/* roulang page: index */
:root{
  --bg-0:#06171E;--bg-1:#0A212B;--bg-2:#0E2C38;--bg-glass:rgba(255,255,255,.06);
  --primary:#1FD8C2;--primary-deep:#0E8F86;--primary-soft:rgba(31,216,194,.14);
  --accent:#F0983C;
  --text:#E9F4F3;--text-2:#9DB5B8;--text-3:#6C878C;--text-invert:#05161C;
  --line:rgba(255,255,255,.10);--line-strong:rgba(31,216,194,.35);
  --ok:#3FD08A;--warn:#F0983C;--err:#E2604F;
  --r-sm:6px;--r-md:12px;--r-lg:20px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(0,0,0,.30);
  --sh-2:0 12px 32px rgba(0,0,0,.35);
  --sh-glow:0 0 0 1px rgba(31,216,194,.35),0 8px 24px rgba(31,216,194,.22);
  --sec-y:110px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg-0);color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",Roboto,Inter,Arial,sans-serif;
  font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text)}
p{margin:0 0 14px}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.container{max-width:1240px;margin:0 auto;padding:0 24px;width:100%}
.container .grid-x.grid-padding-x{margin-left:-12px;margin-right:-12px}
.container .grid-x.grid-padding-x>.cell{padding-left:12px;padding-right:12px}
.sec{padding:var(--sec-y) 0}
.sec-tight{padding:76px 0}
.sec-head{margin-bottom:40px;max-width:760px}
.sec-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.08em;color:var(--primary);text-transform:uppercase;margin-bottom:14px}
.sec-head .eyebrow::before{content:"";width:22px;height:1px;background:var(--primary);display:inline-block}
.sec-head h2{font-size:clamp(24px,3.2vw,36px);line-height:1.3;margin-bottom:14px}
.sec-head p{color:var(--text-2);max-width:680px;margin:0}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.muted{color:var(--text-2)}
.small{font-size:14px;line-height:1.7}
.tnum{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 24px;border-radius:var(--r-md);border:1px solid transparent;font-weight:600;font-size:15px;cursor:pointer;transition:all .2s ease-out;white-space:nowrap}
.btn-primary{background:var(--primary);color:var(--text-invert);box-shadow:var(--sh-glow)}
.btn-primary:hover{background:#2ee5cf;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(31,216,194,.45),0 12px 28px rgba(31,216,194,.30)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--primary)}
.btn-ghost:hover{background:var(--primary-soft);border-color:var(--primary)}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}
.link-more{color:var(--primary);font-weight:600;font-size:14px;display:inline-flex;align-items:center;gap:6px;transition:all .2s ease-out}
.link-more::after{content:"→";transition:transform .2s ease-out}
.link-more:hover::after{transform:translateX(4px)}
.badge{display:inline-block;padding:3px 10px;border-radius:var(--r-sm);font-size:12.5px;line-height:1.6;background:var(--primary-soft);color:var(--primary);border:1px solid rgba(31,216,194,.22)}
.badge-accent{background:rgba(240,152,60,.14);color:var(--accent);border-color:rgba(240,152,60,.26)}
.chip{display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:var(--r-pill);border:1px solid rgba(31,216,194,.30);color:var(--primary);font-size:13px;transition:all .2s ease-out}
.chip:hover{background:var(--primary-soft)}

/* 导航 */
.site-header{position:sticky;top:0;z-index:80;background:rgba(6,23,30,.72);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--line);transition:all .25s ease-out}
.site-header.is-scrolled{background:rgba(7,26,34,.96);border-bottom-color:rgba(31,216,194,.22);box-shadow:0 10px 30px rgba(0,0,0,.34)}
.header-bar{display:flex;align-items:center;gap:20px;min-height:88px;transition:min-height .25s ease-out}
.site-header.is-scrolled .header-bar{min-height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:var(--r-sm);border:1px solid var(--line-strong);color:var(--primary);background:var(--primary-soft)}
.brand-text{font-size:19px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.nav-search{position:relative;flex:1 1 auto;min-width:220px;max-width:460px;display:flex;align-items:center;height:46px;border-radius:var(--r-pill);background:rgba(255,255,255,.05);border:1px solid var(--line);transition:all .2s ease-out}
.nav-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 1px rgba(31,216,194,.28),0 8px 22px rgba(31,216,194,.16)}
.nav-search .search-icon{width:18px;height:18px;margin-left:16px;color:var(--text-3);flex:0 0 auto;stroke:currentColor;fill:none;stroke-width:1.5}
.nav-search input{flex:1 1 auto;height:100%;min-width:0;background:transparent;border:0;outline:none;padding:0 10px;font-size:14.5px;color:var(--text)}
.nav-search input::placeholder{color:var(--text-3)}
.nav-search .search-btn{flex:0 0 auto;height:34px;margin-right:6px;padding:0 16px;border:0;border-radius:var(--r-pill);background:var(--primary);color:var(--text-invert);font-size:13.5px;font-weight:700;cursor:pointer;box-shadow:0 4px 16px rgba(31,216,194,.30);transition:all .2s ease-out}
.nav-search .search-btn:hover{background:#2ee5cf}
.hot-chips{position:absolute;top:calc(100% + 10px);left:0;right:0;display:flex;flex-wrap:wrap;gap:8px;padding:14px;border-radius:var(--r-md);background:rgba(10,33,43,.97);border:1px solid var(--line);box-shadow:var(--sh-2);opacity:0;visibility:hidden;transform:translateY(-6px);transition:all .2s ease-out}
.nav-search:focus-within .hot-chips{opacity:1;visibility:visible;transform:translateY(0)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{padding:8px 11px;border-radius:var(--r-sm);font-size:14.5px;color:var(--text-2);position:relative;transition:all .2s ease-out;white-space:nowrap}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-link.active{color:var(--primary)}
.nav-link.active::after{content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;border-radius:2px;background:var(--primary);box-shadow:0 0 10px rgba(31,216,194,.6)}
.nav-cta{flex:0 0 auto;margin-left:8px}
.hamburger{display:none;flex:0 0 auto;width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--line);background:rgba(255,255,255,.04);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.hamburger span{display:block;width:18px;height:1.6px;background:var(--text);border-radius:2px}
.drawer{position:fixed;inset:0 0 0 auto;width:min(360px,86vw);background:rgba(8,27,35,.98);border-left:1px solid var(--line);z-index:120;transform:translateX(100%);transition:transform .26s ease-out;padding:22px;overflow-y:auto}
.drawer.is-open{transform:translateX(0)}
.drawer-mask{position:fixed;inset:0;background:rgba(2,10,14,.62);z-index:110;opacity:0;visibility:hidden;transition:all .25s ease-out}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-close{width:40px;height:40px;border-radius:var(--r-sm);border:1px solid var(--line);background:transparent;cursor:pointer;font-size:18px;line-height:1}
.drawer nav{display:flex;flex-direction:column;gap:4px;margin:18px 0}
.drawer nav a{padding:11px 12px;border-radius:var(--r-sm);color:var(--text-2);font-size:15px;border:1px solid transparent}
.drawer nav a:hover{background:rgba(255,255,255,.05);color:var(--text)}
.drawer nav a.active{color:var(--primary);border-color:var(--line-strong);background:var(--primary-soft)}
.drawer-search{display:flex;align-items:center;height:44px;border-radius:var(--r-pill);border:1px solid var(--line);background:rgba(255,255,255,.05);padding:0 6px 0 14px}
.drawer-search input{flex:1;background:transparent;border:0;outline:none;font-size:14px;min-width:0}
.drawer-search button{height:32px;padding:0 14px;border:0;border-radius:var(--r-pill);background:var(--primary);color:var(--text-invert);font-size:13px;font-weight:700;cursor:pointer}
.drawer-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

/* Hero */
.hero{position:relative;padding:96px 0 76px;overflow:hidden;background:linear-gradient(180deg,#08202A 0%,#06171E 72%)}
.hero::before{content:"";position:absolute;inset:0;background-image:url("/assets/images/backpic/back-2.webp");background-size:cover;background-position:center right;opacity:.22}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(31,216,194,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(31,216,194,.055) 1px,transparent 1px);background-size:64px 64px;mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 82%);-webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 82%);opacity:.7}
.hero .container{position:relative;z-index:2}
.hero-grid{display:flex;align-items:center;gap:44px;flex-wrap:wrap}
.hero-copy{flex:1 1 520px;min-width:0}
.hero-visual{flex:1 1 380px;min-width:0}
.hero h1{font-size:clamp(32px,5vw,56px);line-height:1.2;letter-spacing:-.01em;font-weight:800;margin:18px 0 18px}
.hero h1 .hl{color:var(--primary)}
.hero-sub{font-size:clamp(16px,1.6vw,18px);color:var(--text-2);max-width:600px;margin-bottom:30px;line-height:1.85}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-visual{position:relative}
.hero-visual img{width:100%;border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--sh-2);object-fit:cover;aspect-ratio:4/3}
.hero-visual .visual-tag{position:absolute;left:18px;bottom:18px;padding:8px 14px;border-radius:var(--r-pill);font-size:13px;background:rgba(6,23,30,.78);border:1px solid var(--line-strong);color:var(--primary);backdrop-filter:blur(10px)}
.hero-strip{margin-top:56px;border-radius:var(--r-lg);border:1px solid var(--line);background:var(--bg-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);padding:6px 0}
.strip-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.strip-item{padding:18px 22px;border-right:1px solid var(--line)}
.strip-item:last-child{border-right:0}
.strip-item h4{font-size:15px;margin-bottom:4px}
.strip-item p{margin:0;font-size:13px;color:var(--text-3);line-height:1.7}

/* 服务能力 */
.service-main{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:var(--bg-2);height:100%;display:flex;flex-direction:column;transition:all .2s ease-out}
.service-main:hover{border-color:var(--line-strong);box-shadow:var(--sh-2)}
.service-main img{width:100%;aspect-ratio:16/9;object-fit:cover}
.service-main .sm-body{padding:26px 28px 28px}
.service-main h3{font-size:22px;margin-bottom:12px}
.service-main p{color:var(--text-2);font-size:15px}
.service-sub{display:flex;flex-direction:column;gap:16px}
.service-card{display:flex;gap:16px;padding:20px 22px;border-radius:var(--r-md);border:1px solid var(--line);background:var(--bg-2);transition:all .2s ease-out}
.service-card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.service-card .ico{flex:0 0 auto;width:40px;height:40px;border-radius:var(--r-sm);display:grid;place-items:center;border:1px solid rgba(31,216,194,.28);background:var(--primary-soft);color:var(--primary)}
.service-card .ico svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.service-card h4{font-size:17px;margin-bottom:6px}
.service-card p{font-size:14px;color:var(--text-2);margin:0 0 8px}

/* 数据 */
.metrics{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.metric{padding:10px 26px;border-left:1px solid var(--line)}
.metric:first-child{border-left:0;padding-left:0}
.metric .num{font-size:clamp(34px,4vw,48px);font-weight:800;color:var(--accent);line-height:1.15;text-shadow:0 0 22px rgba(240,152,60,.35);font-variant-numeric:tabular-nums}
.metric .num small{font-size:16px;font-weight:700;margin-left:4px;color:var(--accent)}
.metric h4{font-size:15px;margin:10px 0 6px}
.metric p{margin:0;font-size:13.5px;color:var(--text-3);line-height:1.75}

/* 案例 */
.case-card{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:var(--bg-2);height:100%;display:flex;flex-direction:column;transition:all .2s ease-out}
.case-card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.case-media{position:relative;overflow:hidden}
.case-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s ease-out}
.case-card:hover .case-media img{transform:scale(1.03)}
.case-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,23,30,0) 40%,rgba(6,23,30,.72) 100%)}
.case-media .badge{position:absolute;top:14px;left:14px;z-index:2}
.case-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1 1 auto}
.case-body h3{font-size:18px;margin-bottom:10px;line-height:1.45}
.case-body p{font-size:14px;color:var(--text-2);flex:1 1 auto}

/* 方案 */
.plan-card{position:relative;border-radius:var(--r-lg);border:1px solid var(--line);background:var(--bg-2);padding:32px 28px;height:100%;display:flex;flex-direction:column;transition:all .2s ease-out}
.plan-card:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:var(--sh-2)}
.plan-card.is-featured{border-color:var(--primary);box-shadow:var(--sh-glow);background:linear-gradient(180deg,rgba(31,216,194,.09),rgba(14,44,56,.9))}
.plan-card .flag{position:absolute;top:-13px;right:22px;padding:4px 14px;border-radius:var(--r-pill);background:var(--primary);color:var(--text-invert);font-size:12.5px;font-weight:700;box-shadow:0 6px 18px rgba(31,216,194,.35)}
.plan-card h3{font-size:21px;margin-bottom:8px}
.plan-card .plan-for{font-size:13.5px;color:var(--text-3);margin-bottom:20px}
.plan-card ul{display:flex;flex-direction:column;gap:10px;margin-bottom:26px}
.plan-card li{position:relative;padding-left:24px;font-size:14.5px;color:var(--text-2);line-height:1.75}
.plan-card li::before{content:"";position:absolute;left:0;top:9px;width:12px;height:7px;border-left:1.6px solid var(--primary);border-bottom:1.6px solid var(--primary);transform:rotate(-45deg)}
.plan-card .btn{margin-top:auto;width:100%}

/* 资讯列表 */
.news-list{margin-top:8px}
.news-item{height:100%;border-radius:var(--r-lg);border:1px solid var(--line);background:var(--bg-2);overflow:hidden;transition:all .2s ease-out;display:flex;flex-direction:column}
.news-item:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.news-link{display:flex;flex-direction:column;height:100%;color:inherit}
.news-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}
.news-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1 1 auto}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.news-cat{display:inline-block;padding:3px 10px;border-radius:var(--r-sm);font-size:12.5px;background:var(--primary-soft);color:var(--primary);border:1px solid rgba(31,216,194,.22);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:58%}
.news-time{font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums;white-space:nowrap}
.news-title{font-size:17px;line-height:1.5;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item:hover .news-title{color:var(--primary)}
.news-excerpt{font-size:14px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.news-empty{margin-top:8px;padding:38px 24px;border-radius:var(--r-lg);border:1px dashed var(--line);background:rgba(255,255,255,.03);text-align:center;color:var(--text-3);font-size:15px}
.news-more{display:flex;justify-content:center;margin-top:34px}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:260px 1fr;gap:44px;align-items:start}
.faq-nav{position:sticky;top:118px;border-left:1px solid var(--line);padding-left:20px}
.faq-nav h4{font-size:14px;color:var(--text-3);margin-bottom:14px;letter-spacing:.06em}
.faq-nav a{display:block;padding:8px 0;font-size:14.5px;color:var(--text-2);transition:all .2s ease-out}
.faq-nav a:hover{color:var(--primary)}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);position:relative}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:22px 0 22px 16px;background:transparent;border:0;text-align:left;font-size:17px;font-weight:600;color:var(--text);cursor:pointer;transition:all .2s ease-out}
.faq-q:hover{color:var(--primary)}
.faq-item.is-open .faq-q{color:var(--primary)}
.faq-item::before{content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;border-radius:3px;background:var(--primary);opacity:0;transition:opacity .2s ease-out}
.faq-item.is-open::before{opacity:1}
.faq-sign{flex:0 0 auto;width:22px;height:22px;display:grid;place-items:center;font-size:18px;line-height:1;color:var(--primary);border:1px solid rgba(31,216,194,.30);border-radius:50%;transition:all .2s ease-out}
.faq-a{padding:0 0 0 16px;max-height:0;overflow:hidden;transition:max-height .28s ease-out}
.faq-a p{font-size:15px;color:var(--text-2);padding-bottom:22px;margin:0}

/* 联系 */
.contact{background:var(--bg-1);border-top:1px solid var(--line)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}
.contact h2{font-size:clamp(24px,3vw,34px);line-height:1.32;margin-bottom:16px}
.contact .lead{color:var(--text-2);margin-bottom:28px}
.info-block{display:flex;gap:14px;padding:16px 0;border-top:1px solid var(--line)}
.info-block .ico{flex:0 0 auto;width:38px;height:38px;border-radius:var(--r-sm);display:grid;place-items:center;border:1px solid rgba(31,216,194,.28);background:var(--primary-soft);color:var(--primary)}
.info-block .ico svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.info-block h4{font-size:16px;margin-bottom:4px}
.info-block p{margin:0;font-size:14px;color:var(--text-2)}
.form-panel{border-radius:var(--r-lg);border:1px solid var(--line);background:var(--bg-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);padding:30px 28px}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;margin-bottom:8px;color:var(--text-2)}
.field input,.field select,.field textarea{width:100%;background:rgba(6,23,30,.55);border:1px solid var(--line);border-radius:var(--r-sm);padding:0 14px;height:48px;font-size:15px;color:var(--text);outline:none;transition:all .2s ease-out;appearance:none}
.field textarea{height:auto;padding:12px 14px;line-height:1.7;resize:vertical;min-height:110px}
.field select{background-image:linear-gradient(45deg,transparent 50%,var(--primary) 50%),linear-gradient(135deg,var(--primary) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--primary);box-shadow:0 0 0 1px rgba(31,216,194,.25),0 6px 18px rgba(31,216,194,.14)}
.field .err{display:none;font-size:13px;color:var(--err);margin-top:6px}
.field.is-invalid input,.field.is-invalid select,.field.is-invalid textarea{border-color:var(--err)}
.field.is-invalid .err{display:block}
.form-note{font-size:13px;color:var(--text-3);margin:14px 0 0}
.form-ok{display:none;margin-top:16px;padding:12px 16px;border-radius:var(--r-sm);background:rgba(63,208,138,.12);border:1px solid rgba(63,208,138,.32);color:var(--ok);font-size:14px}
.form-ok.is-show{display:block}

/* 页脚 */
.site-footer{background:#041116;border-top:1px solid var(--line);position:relative;padding:66px 0 0;margin-top:0}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(31,216,194,.7),transparent)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:340px}
.footer-col h4{font-size:15px;margin-bottom:16px}
.footer-col a,.footer-col li{display:block;font-size:14px;color:var(--text-2);padding:5px 0;transition:color .2s ease-out}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{margin-top:52px;border-top:1px solid var(--line);padding:20px 0 26px;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--text-3)}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--primary)}
.to-top{position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:var(--r-sm);border:1px solid var(--line-strong);background:rgba(8,27,35,.9);color:var(--primary);display:grid;place-items:center;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .22s ease-out;z-index:70}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--primary-soft);box-shadow:var(--sh-glow)}

/* 入场动画 */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease-out,transform .5s ease-out}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{transition-duration:.01ms !important}
}

/* 断点 */
@media (max-width:1439px){:root{--sec-y:100px}}
@media (max-width:1199px){
  .container{max-width:1140px}
  .nav-link{padding:8px 9px;font-size:14px}
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .metric{border-left:0;padding:22px 0}
  .metric:nth-child(odd){padding-right:20px;border-right:1px solid var(--line)}
  .faq-wrap{grid-template-columns:1fr;gap:26px}
  .faq-nav{position:static;border-left:0;padding-left:0;display:flex;flex-wrap:wrap;gap:10px;align-items:center}
  .faq-nav h4{width:100%;margin-bottom:4px}
  .faq-nav a{padding:6px 12px;border:1px solid var(--line);border-radius:var(--r-pill);font-size:13.5px}
}
@media (max-width:1100px){
  .main-nav,.nav-cta{display:none}
  .hamburger{display:flex}
  .nav-search{max-width:none}
}
@media (max-width:991px){
  :root{--sec-y:80px}
  .hero{padding:70px 0 60px}
  .hero-grid{gap:34px}
  .strip-grid{grid-template-columns:repeat(2,1fr)}
  .strip-item:nth-child(2){border-right:0}
  .strip-item:nth-child(1),.strip-item:nth-child(2){border-bottom:1px solid var(--line)}
  .contact-grid{grid-template-columns:1fr;gap:34px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:767px){
  :root{--sec-y:58px}
  .container{padding:0 16px}
  .container .grid-x.grid-padding-x{margin-left:-10px;margin-right:-10px}
  .container .grid-x.grid-padding-x>.cell{padding-left:10px;padding-right:10px}
  .header-bar{flex-wrap:wrap;gap:12px;min-height:64px;padding:10px 0}
  .site-header.is-scrolled .header-bar{min-height:58px}
  .nav-search{order:3;flex:1 1 100%;max-width:none;height:44px}
  .hero h1{font-size:clamp(28px,7vw,38px)}
  .hero-visual{flex:1 1 100%}
  .strip-grid{grid-template-columns:1fr}
  .strip-item{border-right:0;border-bottom:1px solid var(--line);padding:16px 18px}
  .strip-item:last-child{border-bottom:0}
  .metrics-grid{grid-template-columns:1fr}
  .metric{padding:18px 0 !important;border-right:0 !important;border-bottom:1px solid var(--line)}
  .metric:last-child{border-bottom:0}
  .faq-q{font-size:16px;padding:18px 0 18px 14px}
  .form-panel{padding:24px 18px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .to-top{right:14px;bottom:18px}
}
@media (max-width:520px){
  .hero-actions .btn{width:100%}
  .plan-card{padding:26px 20px}
  .service-main .sm-body{padding:20px 18px}
  .case-body{padding:18px 18px 20px}
}

/* roulang page: article */
:root{
  --bg-0:#06171E;
  --bg-1:#0A212B;
  --bg-2:#0E2C38;
  --bg-glass:rgba(255,255,255,.06);
  --primary:#1FD8C2;
  --primary-deep:#0E8F86;
  --primary-soft:rgba(31,216,194,.14);
  --accent:#F0983C;
  --text:#E9F4F3;
  --text-2:#9DB5B8;
  --text-3:#6C878C;
  --text-invert:#05161C;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(31,216,194,.35);
  --ok:#3FD08A;
  --err:#E2604F;
  --r-sm:6px;
  --r-md:12px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-sm:0 1px 2px rgba(0,0,0,.30);
  --sh-md:0 12px 32px rgba(0,0,0,.35);
  --sh-glow:0 0 0 1px rgba(31,216,194,.35), 0 8px 24px rgba(31,216,194,.22);
  --ease:all .2s ease-out;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg-0);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(31,216,194,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(31,216,194,.05) 1px,transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(circle at 24% 0%,#000 0%,transparent 68%);
  mask-image:radial-gradient(circle at 24% 0%,#000 0%,transparent 68%);
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:var(--ease);}
a:hover{color:var(--primary);}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;color:var(--text);letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
table{border-collapse:collapse;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}

.site-header,.site-main,.site-footer{position:relative;z-index:1;}
.container{width:100%;max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:var(--ease);
}
.btn-primary{background:var(--primary);color:var(--text-invert);box-shadow:var(--sh-glow);}
.btn-primary:hover{background:#3AE3CF;color:var(--text-invert);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(31,216,194,.45),0 12px 28px rgba(31,216,194,.28);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--primary);}
.btn-ghost:hover{background:rgba(31,216,194,.10);color:var(--primary);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}

.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14px;font-weight:600;}
.text-link span{transition:transform .2s ease-out;}
.text-link:hover{color:var(--primary);}
.text-link:hover span{transform:translateX(4px);}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:200;
  background:rgba(6,23,30,.74);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid transparent;
  transition:background .2s ease-out,border-color .2s ease-out;
}
.site-header.is-scrolled{background:rgba(6,23,30,.95);border-bottom-color:var(--line);}
.nav-shell{
  display:flex;align-items:center;gap:20px;
  height:88px;
  transition:height .2s ease-out;
}
.site-header.is-scrolled .nav-shell{height:68px;}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--primary);
  background:var(--primary-soft);
  border:1px solid var(--line-strong);
}
.brand-text{font-size:17px;font-weight:800;letter-spacing:.01em;color:var(--text);white-space:nowrap;}
.brand:hover .brand-text{color:var(--primary);}

.nav-search{
  position:relative;display:flex;align-items:center;
  flex:1 1 auto;max-width:520px;height:46px;
  padding:0 6px 0 44px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  transition:var(--ease);
}
.nav-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(31,216,194,.14);}
.search-icon{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--text-3);display:inline-flex;}
.nav-search:focus-within .search-icon{color:var(--primary);}
.nav-search input{
  width:100%;height:100%;min-width:0;
  background:transparent;border:0;outline:none;
  color:var(--text);font-size:14px;
}
.nav-search input::placeholder{color:var(--text-3);}
.search-btn{
  flex:0 0 auto;height:34px;padding:0 16px;
  border:0;border-radius:var(--r-pill);
  background:var(--primary);color:var(--text-invert);
  font-size:13px;font-weight:700;cursor:pointer;
  box-shadow:0 6px 18px rgba(31,216,194,.24);
  transition:var(--ease);
}
.search-btn:hover{background:#3AE3CF;transform:translateY(-1px);}

.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto;flex:0 0 auto;}
.nav-link{
  position:relative;
  padding:8px 12px;border-radius:var(--r-sm);
  font-size:14.5px;font-weight:500;color:var(--text-2);white-space:nowrap;
  transition:var(--ease);
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05);}
.nav-link.active{color:var(--primary);}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  border-radius:2px;background:var(--primary);
  box-shadow:0 0 10px rgba(31,216,194,.6);
}
.nav-cta{margin-left:10px;}

.nav-hot{
  display:flex;align-items:center;gap:8px;
  max-height:44px;overflow:hidden;
  padding:0 0 12px;
  transition:max-height .2s ease-out,opacity .2s ease-out,padding .2s ease-out;
}
.site-header.is-scrolled .nav-hot{max-height:0;opacity:0;padding-bottom:0;}
.nav-hot-label{font-size:12.5px;color:var(--text-3);flex:0 0 auto;}
.chip{
  display:inline-flex;align-items:center;
  height:26px;padding:0 12px;
  border-radius:var(--r-pill);
  border:1px solid rgba(31,216,194,.30);
  background:rgba(31,216,194,.06);
  color:var(--primary);font-size:12.5px;white-space:nowrap;
  transition:var(--ease);
}
.chip:hover{background:rgba(31,216,194,.16);border-color:var(--line-strong);color:var(--primary);}

.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;flex:0 0 auto;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);border-radius:var(--r-md);
  color:var(--text);cursor:pointer;
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--primary);}
.nav-mask{
  display:none;position:fixed;inset:0;z-index:205;
  background:rgba(3,12,16,.6);
  -webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);
}
.nav-mask.is-open{display:block;}

/* ---------- page head ---------- */
.page-head{
  position:relative;
  padding:44px 0 40px;
  border-bottom:1px solid var(--line);
  background:
    linear-gradient(180deg,rgba(6,23,30,.88) 0%,rgba(6,23,30,.97) 100%),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
}
.page-head::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(31,216,194,.55),transparent);
}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13.5px;color:var(--text-3);margin-bottom:22px;
}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-3);opacity:.7;}
.breadcrumb .current{color:var(--primary);max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

.article-cat{
  display:inline-flex;align-items:center;gap:6px;
  height:28px;padding:0 14px;margin-bottom:18px;
  border-radius:var(--r-pill);
  background:var(--primary-soft);color:var(--primary);
  font-size:13px;font-weight:600;
}
.article-title{
  font-size:clamp(30px,4.2vw,46px);
  font-weight:800;line-height:1.22;letter-spacing:-.01em;
  max-width:960px;
}
.article-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px 22px;
  margin-top:22px;font-size:13.5px;color:var(--text-3);
}
.meta-item{display:inline-flex;align-items:center;gap:7px;}
.meta-item svg{color:var(--primary);opacity:.85;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
.meta-divider{width:1px;height:14px;background:var(--line);}

/* ---------- article body ---------- */
.article-section{padding:56px 0 0;}
.article-wrap{display:flex;gap:36px;justify-content:center;}
.article-main{width:100%;max-width:820px;min-width:0;}
.article-body{
  font-size:16.5px;line-height:1.9;color:var(--text);
  background:rgba(14,44,56,.45);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:40px 44px;
}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  font-size:24px;line-height:1.4;font-weight:700;
  margin:40px 0 16px;padding-left:14px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;
  border-radius:2px;background:var(--primary);
}
.article-body h3{font-size:20px;line-height:1.5;font-weight:700;margin:28px 0 12px;}
.article-body h4{font-size:17px;font-weight:600;margin:22px 0 10px;color:var(--text-2);}
.article-body h2:first-child,.article-body h3:first-child{margin-top:0;}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:#3AE3CF;}
.article-body strong{color:#fff;font-weight:700;}
.article-body ul,.article-body ol{margin:0 0 1.2em;}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.5em;}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:7px;height:7px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 8px rgba(31,216,194,.5);
}
.article-body ol{counter-reset:ab-item;}
.article-body ol li{counter-increment:ab-item;position:relative;padding-left:30px;margin-bottom:.5em;}
.article-body ol li::before{
  content:counter(ab-item,decimal-leading-zero);
  position:absolute;left:0;top:0;
  color:var(--primary);font-weight:700;font-size:14px;
  font-variant-numeric:tabular-nums;
}
.article-body blockquote{
  margin:24px 0;padding:16px 22px;
  border-left:3px solid var(--primary);
  background:rgba(31,216,194,.06);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-md);margin:24px auto;}
.article-body figure{margin:24px 0;}
.article-body figcaption{
  margin-top:10px;text-align:center;
  font-size:13px;color:var(--text-3);
}
.article-body table{
  width:100%;font-size:14.5px;min-width:520px;
  background:rgba(255,255,255,.02);
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
}
.article-body .table-scroll{overflow-x:auto;margin:24px 0;border-radius:var(--r-md);}
.article-body th{
  text-align:left;padding:12px 16px;font-weight:600;color:var(--primary);
  background:rgba(31,216,194,.10);border-bottom:1px solid var(--line);
}
.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);color:var(--text-2);}
.article-body tr:last-child td{border-bottom:0;}
.article-body pre{
  margin:24px 0;padding:18px 20px;
  background:#04121A;border:1px solid var(--line);border-radius:var(--r-md);
  overflow-x:auto;
}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;color:#7FE9DB;
}
.article-body p code,.article-body li code{
  padding:2px 6px;border-radius:var(--r-sm);
  background:rgba(31,216,194,.10);
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0;}
.article-empty{
  text-align:center;padding:32px 20px 12px;
}
.article-empty h2{font-size:24px;margin-bottom:12px;padding:0;}
.article-empty h2::before{display:none;}
.article-empty p{color:var(--text-2);margin-bottom:24px;}

/* ---------- inline CTA ---------- */
.article-cta{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  margin-top:48px;padding:26px 30px;
  background:var(--bg-glass);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border:1px solid var(--line);border-radius:var(--r-lg);
}
.article-cta h3{font-size:19px;font-weight:700;margin-bottom:8px;}
.article-cta p{font-size:14.5px;color:var(--text-2);max-width:560px;}

/* ---------- related ---------- */
.related{padding:72px 0 0;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:32px;
}
.section-head h2{font-size:clamp(22px,2.6vw,30px);}
.section-head p{margin-top:10px;font-size:14.5px;color:var(--text-2);}
.rel-grid{margin-top:0;}
.rel-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--bg-2);
  border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;
  transition:var(--ease);
}
.rel-card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--sh-md);}
.rel-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-1);}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
.rel-card:hover .rel-thumb img{transform:scale(1.03);}
.rel-thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,23,30,0) 35%,rgba(6,23,30,.85) 100%);
}
.rel-body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1 1 auto;}
.rel-cat{
  align-self:flex-start;
  padding:4px 12px;margin-bottom:14px;
  border-radius:var(--r-pill);
  background:var(--primary-soft);color:var(--primary);
  font-size:12.5px;font-weight:600;
}
.rel-title{font-size:17.5px;font-weight:700;line-height:1.45;margin-bottom:10px;}
.rel-card:hover .rel-title{color:var(--primary);}
.rel-excerpt{font-size:14px;color:var(--text-2);line-height:1.75;margin-bottom:18px;flex:1 1 auto;}
.rel-link{font-size:13.5px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px;}
.rel-link span{transition:transform .2s ease-out;}
.rel-card:hover .rel-link span{transform:translateX(4px);}

/* ---------- faq ---------- */
.faq{padding:72px 0 0;}
.faq-list{
  border-top:1px solid var(--line);
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 0 20px 0;
  background:transparent;border:0;
  text-align:left;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--text);
  transition:var(--ease);
  position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:-14px;top:16px;bottom:16px;width:3px;
  border-radius:2px;background:var(--primary);
  opacity:0;transition:var(--ease);
}
.faq-q:hover{color:var(--primary);}
.faq-item.is-open .faq-q{color:var(--primary);}
.faq-item.is-open .faq-q::before{opacity:1;}
.faq-icon{
  flex:0 0 auto;width:22px;height:22px;position:relative;color:var(--primary);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  background:currentColor;border-radius:2px;
}
.faq-icon::before{width:14px;height:1.6px;}
.faq-icon::after{width:1.6px;height:14px;transition:transform .2s ease-out;}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{
  display:none;
  padding:0 0 22px;
  font-size:15px;line-height:1.85;color:var(--text-2);
  max-width:820px;
}
.faq-item.is-open .faq-a{display:block;}

/* ---------- article foot ---------- */
.article-foot{
  padding:56px 0 0;
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.adjacent{display:flex;gap:14px;flex-wrap:wrap;}
.adj-link{
  display:flex;flex-direction:column;gap:4px;
  min-width:196px;padding:14px 18px;
  background:rgba(255,255,255,.03);
  border:1px solid var(--line);border-radius:var(--r-md);
  transition:var(--ease);
}
.adj-link:hover{border-color:var(--line-strong);background:rgba(31,216,194,.07);}
.adj-label{font-size:12.5px;color:var(--text-3);}
.adj-link strong{font-size:15px;font-weight:600;color:var(--text);}
.adj-link:hover strong{color:var(--primary);}

.article-end{padding:72px 0 96px;}

/* ---------- footer ---------- */
.site-footer{
  margin-top:0;
  background:#04121A;
  border-top:1px solid var(--line);
  position:relative;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:2px;
  background:linear-gradient(90deg,rgba(31,216,194,0),rgba(31,216,194,.8),rgba(240,152,60,.5),rgba(31,216,194,0));
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;
  padding:64px 0 44px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.8;max-width:340px;}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:18px;color:var(--text);}
.footer-col a{display:block;font-size:14px;color:var(--text-2);margin-bottom:12px;}
.footer-col a:hover{color:var(--primary);}
.footer-col ul li{font-size:14px;color:var(--text-2);margin-bottom:12px;line-height:1.7;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--primary);}

/* ---------- to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:180;
  width:46px;height:46px;border-radius:var(--r-md);
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(6,23,30,.85);
  border:1px solid var(--line-strong);
  color:var(--primary);cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  transition:var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:rgba(31,216,194,.14);box-shadow:var(--sh-glow);}

/* ---------- responsive ---------- */
@media (min-width:1200px) and (max-width:1439px){
  .container{max-width:1140px;}
}
@media (max-width:1199px){
  .nav-search{max-width:380px;}
  .article-body{padding:34px 32px;}
}
@media (max-width:991px){
  .nav-shell{height:78px;}
  .nav-search{max-width:300px;}
  .nav-hot{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 36px;}
  .footer-brand p{max-width:none;}
}
@media (max-width:768px){
  .container{padding-left:16px;padding-right:16px;}
  .nav-shell{height:64px;flex-wrap:wrap;gap:12px;padding-top:10px;padding-bottom:10px;}
  .site-header.is-scrolled .nav-shell{height:60px;}
  .nav-search{order:3;flex:1 0 100%;max-width:100%;height:44px;}
  .nav-toggle{display:inline-flex;}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;width:min(84vw,340px);
    z-index:210;margin:0;
    flex-direction:column;align-items:stretch;gap:4px;
    padding:84px 20px 28px;
    background:#08202A;
    border-left:1px solid var(--line);
    transform:translateX(100%);
    transition:transform .24s ease-out;
    overflow-y:auto;
  }
  .main-nav.is-open{transform:translateX(0);}
  .nav-link{padding:14px 12px;font-size:16px;border-bottom:1px solid var(--line);border-radius:0;}
  .nav-link.active::after{display:none;}
  .nav-link.active{background:rgba(31,216,194,.08);}
  .nav-cta{margin:20px 0 0;width:100%;}
  .nav-cta .btn{width:100%;}
  .nav-mask.is-open{display:block;}

  .page-head{padding:32px 0 30px;}
  .breadcrumb{margin-bottom:16px;}
  .breadcrumb .current{max-width:180px;}
  .article-title{font-size:clamp(26px,7vw,34px);}
  .article-meta{gap:8px 16px;font-size:13px;}

  .article-section{padding:32px 0 0;}
  .article-body{padding:24px 20px;font-size:15.5px;line-height:1.85;border-radius:var(--r-md);}
  .article-body h2{font-size:21px;margin:32px 0 14px;}
  .article-body h3{font-size:18px;margin:24px 0 10px;}
  .article-cta{padding:22px;margin-top:32px;}
  .article-cta .btn{width:100%;}

  .related,.faq{padding:48px 0 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:24px;}
  .article-foot{flex-direction:column;align-items:stretch;padding:40px 0 0;}
  .adj-link{min-width:0;flex:1 1 100%;}
  .article-end{padding:48px 0 64px;}

  .footer-grid{grid-template-columns:1fr;gap:28px;padding:44px 0 28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .to-top{right:16px;bottom:18px;}
}
@media (max-width:480px){
  .brand-text{font-size:15.5px;}
  .brand-mark{width:34px;height:34px;}
  .btn{width:100%;min-width:160px;}
  .adjacent{flex-direction:column;}
  .article-body{padding:20px 16px;}
  .article-cta{padding:18px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category1 */
:root{
  --bg-0:#06171E;
  --bg-1:#0A212B;
  --bg-2:#0E2C38;
  --bg-glass:rgba(255,255,255,.06);
  --primary:#1FD8C2;
  --primary-deep:#0E8F86;
  --primary-soft:rgba(31,216,194,.14);
  --accent:#F0983C;
  --text:#E9F4F3;
  --text-2:#9DB5B8;
  --text-3:#6C878C;
  --text-invert:#05161C;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(31,216,194,.35);
  --ok:#3FD08A;
  --warn:#F0983C;
  --err:#E2604F;
  --r-sm:6px;
  --r-md:12px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-s:0 1px 2px rgba(0,0,0,.30);
  --sh-m:0 12px 32px rgba(0,0,0,.35);
  --sh-glow:0 0 0 1px rgba(31,216,194,.35),0 8px 24px rgba(31,216,194,.22);
  --font-cn:-apple-system,BlinkMacSystemFont,"Segoe UI","Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-num:"Inter","SFMono-Regular","Helvetica Neue",Arial,sans-serif;
  --sp-1:8px;
  --sp-2:16px;
  --sp-3:24px;
  --sp-4:32px;
  --sp-5:48px;
  --sp-6:64px;
  --sp-7:96px;
  --header-h:88px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:110px;-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding-top:var(--header-h);
  background:var(--bg-0);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.drawer-open{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none;transition:all .2s ease-out}
a:hover{color:#63ead9}
ul,ol{margin:0 0 16px;padding-left:1.25em}
p{margin:0 0 14px}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--primary);color:var(--text-invert);
  padding:10px 18px;border-radius:0 0 var(--r-md) 0;font-weight:700;
}
.skip-link:focus{left:0}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--header-h);
  background:rgba(6,23,30,.62);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid transparent;
  transition:background .25s ease-out,height .25s ease-out,border-color .25s ease-out,box-shadow .25s ease-out;
}
.site-header.scrolled{
  height:68px;
  background:rgba(7,26,33,.95);
  border-bottom-color:var(--line);
  box-shadow:0 12px 32px rgba(0,0,0,.35);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:100%;
}
.brand{
  display:flex;align-items:center;gap:10px;
  flex:0 0 auto;color:var(--text);
}
.brand:hover{color:var(--text)}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;
  display:flex;align-items:center;justify-content:center;
  border-radius:var(--r-md);
  color:var(--primary);
  background:var(--primary-soft);
  border:1px solid var(--line-strong);
}
.brand-text{
  font-size:18px;font-weight:800;letter-spacing:.01em;white-space:nowrap;
}
.brand-text em{font-style:normal;color:var(--primary)}

.nav-search{
  position:relative;
  flex:1 1 380px;
  max-width:520px;
  margin:0 auto;
}
.search-form{
  display:flex;align-items:center;
  height:46px;
  padding:0 4px 0 16px;
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.06);
  border:1px solid var(--line);
  transition:all .2s ease-out;
}
.search-form:focus-within{
  border-color:var(--line-strong);
  box-shadow:var(--sh-glow);
  background:rgba(255,255,255,.08);
}
.search-icon{flex:0 0 auto;color:var(--text-3);display:flex}
.search-form:focus-within .search-icon{color:var(--primary)}
.search-input{
  flex:1 1 auto;min-width:0;
  height:100%;
  background:none;border:0;outline:none;
  padding:0 12px;
  color:var(--text);
  font-size:15px;
}
.search-input::placeholder{color:var(--text-3)}
.search-btn{
  flex:0 0 auto;
  height:36px;
  padding:0 18px;
  border:0;border-radius:var(--r-pill);
  background:var(--primary);
  color:var(--text-invert);
  font-weight:700;font-size:14px;
  box-shadow:0 0 0 1px rgba(31,216,194,.35),0 6px 18px rgba(31,216,194,.28);
  transition:all .2s ease-out;
}
.search-btn:hover{background:#3ee3ce;transform:translateY(-1px)}
.search-btn:active{transform:translateY(1px)}
.search-chips{
  position:absolute;left:0;right:0;top:calc(100% + 10px);
  display:flex;flex-wrap:wrap;gap:8px;
  padding:14px;
  border-radius:var(--r-md);
  background:rgba(10,33,43,.97);
  border:1px solid var(--line);
  box-shadow:var(--sh-m);
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:all .2s ease-out;
}
.nav-search:focus-within .search-chips{opacity:1;visibility:visible;transform:none}
.search-chips span{font-size:13px;color:var(--text-3);width:100%;margin-bottom:-2px}
.chip{
  display:inline-flex;align-items:center;
  padding:5px 13px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-strong);
  color:var(--primary);
  font-size:13px;
  background:transparent;
  transition:all .2s ease-out;
}
.chip:hover,.chip:focus-visible{background:var(--primary-soft);color:var(--primary);transform:translateY(-1px)}

.header-right{display:flex;align-items:center;gap:22px;flex:0 0 auto;margin-left:auto}
.main-nav{display:flex;align-items:center;gap:22px}
.nav-link{
  position:relative;
  color:var(--text-2);
  font-size:15px;
  padding:6px 0;
  white-space:nowrap;
  transition:all .2s ease-out;
}
.nav-link::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;
  height:2px;border-radius:2px;
  background:var(--primary);
  transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease-out;
  box-shadow:0 0 10px rgba(31,216,194,.7);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--primary);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--r-md);
  font-size:15px;font-weight:700;
  border:1px solid transparent;
  transition:all .2s ease-out;
  white-space:nowrap;
}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn-primary{
  background:var(--primary);
  color:var(--text-invert);
  box-shadow:0 0 0 1px rgba(31,216,194,.35),0 8px 24px rgba(31,216,194,.22);
}
.btn-primary:hover{
  background:#42e4d0;color:var(--text-invert);
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(31,216,194,.5),0 12px 28px rgba(31,216,194,.34);
}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--primary);
}
.btn-ghost:hover{background:var(--primary-soft);color:var(--primary);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-weight:600;font-size:15px;
}
.text-link svg{transition:transform .2s ease-out}
.text-link:hover svg{transform:translateX(4px)}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  background:var(--bg-glass);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  color:var(--text);
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--primary)}

.mobile-drawer{
  position:fixed;left:0;right:0;top:var(--header-h);bottom:0;
  z-index:99;
  background:var(--bg-0);
  border-top:1px solid var(--line);
  padding:24px;
  overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:all .22s ease-out;
}
.mobile-drawer.open{opacity:1;visibility:visible;transform:none}
.mobile-drawer .drawer-search{margin-bottom:22px}
.mobile-drawer .drawer-links{display:flex;flex-direction:column;gap:2px;margin-bottom:24px}
.mobile-drawer .drawer-links a{
  padding:14px 4px;
  color:var(--text-2);
  font-size:16px;
  border-bottom:1px solid var(--line);
}
.mobile-drawer .drawer-links a.active{color:var(--primary);font-weight:700}
.mobile-drawer .chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:56px 0 64px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:var(--bg-1);
}
.page-hero .hero-bg{
  position:absolute;inset:0;
  opacity:.26;
  pointer-events:none;
}
.page-hero .hero-bg img{width:100%;height:100%;object-fit:cover}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(6,23,30,.96) 4%,rgba(6,23,30,.72) 46%,rgba(6,23,30,.92) 100%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);
  margin-bottom:22px;
}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--primary);opacity:.75}
.breadcrumb .current{color:var(--primary)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;
  border-radius:var(--r-pill);
  background:var(--primary-soft);
  color:var(--primary);
  font-size:13px;font-weight:600;
  letter-spacing:.02em;
}
.page-hero h1{
  font-size:clamp(32px,5vw,56px);
  line-height:1.2;
  font-weight:800;
  letter-spacing:-.01em;
  margin:16px 0 18px;
  max-width:16em;
}
.page-hero h1 em{font-style:normal;color:var(--primary)}
.lede{
  max-width:44em;
  color:var(--text-2);
  font-size:17px;
  line-height:1.85;
  margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px}

.anchor-chips{
  display:flex;flex-wrap:wrap;gap:10px;
  padding:16px 18px;
  border-radius:var(--r-lg);
  background:var(--bg-glass);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border:1px solid var(--line);
}
.anchor-chips .chips-label{
  font-size:13px;color:var(--text-3);
  display:flex;align-items:center;
  margin-right:4px;
}
.anchor-chips a{
  display:inline-flex;align-items:center;
  padding:6px 14px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  color:var(--text-2);
  font-size:14px;
  transition:all .2s ease-out;
}
.anchor-chips a:hover{
  border-color:var(--line-strong);
  color:var(--primary);
  background:var(--primary-soft);
  transform:translateY(-1px);
}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-sm{padding:72px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{
  font-size:clamp(24px,3.2vw,36px);
  line-height:1.3;
  font-weight:700;
  margin-bottom:14px;
}
.section-head p{color:var(--text-2);margin:0}
.eyebrow{
  display:block;
  font-size:13px;font-weight:600;letter-spacing:.16em;
  color:var(--primary);
  text-transform:uppercase;
  margin-bottom:12px;
}

/* ---------- 正文两栏 + 锚点目录 ---------- */
.doc-grid{padding-top:72px}
.toc-card{
  position:sticky;top:112px;
  padding:24px;
  border-radius:var(--r-lg);
  background:var(--bg-1);
  border:1px solid var(--line);
  box-shadow:var(--sh-s);
}
.toc-card h2{
  font-size:15px;
  letter-spacing:.08em;
  color:var(--text-3);
  font-weight:600;
  margin-bottom:14px;
}
.toc-card ol{list-style:none;margin:0;padding:0;counter-reset:toc}
.toc-card li{counter-increment:toc;margin-bottom:2px}
.toc-card a{
  display:flex;gap:10px;align-items:flex-start;
  padding:10px 10px;
  border-radius:var(--r-sm);
  color:var(--text-2);
  font-size:14px;
  line-height:1.6;
  transition:all .2s ease-out;
}
.toc-card a::before{
  content:counter(toc,decimal-leading-zero);
  font-family:var(--font-num);
  font-size:12px;
  color:var(--primary);
  opacity:.7;
  padding-top:2px;
}
.toc-card a:hover{background:var(--primary-soft);color:var(--text)}
.toc-note{
  margin-top:18px;padding-top:18px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);line-height:1.7;
}

.doc-block{margin-bottom:56px}
.doc-block:last-child{margin-bottom:0}
.doc-block h2{
  position:relative;
  font-size:clamp(22px,2.6vw,30px);
  line-height:1.35;
  padding-left:16px;
  margin-bottom:20px;
}
.doc-block h2::before{
  content:"";
  position:absolute;left:0;top:.22em;bottom:.22em;
  width:4px;border-radius:2px;
  background:var(--primary);
  box-shadow:0 0 12px rgba(31,216,194,.6);
}
.doc-block h3{
  font-size:20px;font-weight:700;line-height:1.4;
  margin:26px 0 12px;
  color:var(--text);
}
.doc-block p{color:var(--text-2);margin-bottom:14px}
.doc-block strong{color:var(--text);font-weight:600}
.doc-block ul li,.doc-block ol li{color:var(--text-2);margin-bottom:8px}
.doc-block ul li::marker{color:var(--primary)}
.doc-block ol li::marker{color:var(--primary);font-family:var(--font-num);font-weight:700}

.doc-figure{
  margin:24px 0;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
}
.doc-figure img{width:100%;height:280px;object-fit:cover}
.doc-figure figcaption{
  padding:12px 18px;
  font-size:13px;color:var(--text-3);
  background:var(--bg-1);
  border-top:1px solid var(--line);
}

.quote{
  margin:24px 0;
  padding:20px 22px;
  border-left:3px solid var(--primary);
  border-radius:0 var(--r-md) var(--r-md) 0;
  background:rgba(31,216,194,.06);
  color:var(--text);
  font-size:16px;
}
.quote span{display:block;margin-top:8px;font-size:13px;color:var(--text-3)}

/* ---------- 数据条 ---------- */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  margin:28px 0;
  padding:24px 8px;
  border-radius:var(--r-lg);
  background:var(--bg-glass);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border:1px solid var(--line);
}
.stat-item{
  padding:6px 22px;
  border-right:1px solid var(--line);
}
.stat-item:last-child{border-right:0}
.stat-num{
  font-family:var(--font-num);
  font-size:clamp(30px,3.4vw,44px);
  font-weight:800;
  color:var(--accent);
  line-height:1.15;
  text-shadow:0 0 22px rgba(240,152,60,.4);
}
.stat-num small{font-size:15px;font-weight:700;margin-left:2px}
.stat-label{font-size:14px;color:var(--text-3);margin-top:4px}

/* ---------- 参数表 ---------- */
.param-card{
  margin:26px 0;
  border-radius:var(--r-lg);
  background:var(--bg-2);
  border:1px solid var(--line);
  overflow:hidden;
}
.param-card .param-head{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  padding:18px 24px;
  border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.03);
}
.param-card .param-head h3{margin:0;font-size:17px;font-weight:700}
.param-card .param-head .tag{font-size:12px;padding:3px 10px}
.table-scroll{overflow-x:auto}
table.param-table{
  width:100%;
  min-width:620px;
  border-collapse:collapse;
  font-size:15px;
}
table.param-table caption{
  caption-side:top;
  text-align:left;
  padding:14px 24px 0;
  color:var(--text-3);
  font-size:13px;
}
table.param-table th,table.param-table td{
  padding:14px 24px;
  text-align:left;
  border-bottom:1px solid var(--line);
  color:var(--text-2);
  vertical-align:top;
}
table.param-table thead th{
  background:rgba(31,216,194,.08);
  color:var(--text);
  font-weight:600;
  font-size:14px;
  white-space:nowrap;
}
table.param-table tbody tr:last-child td{border-bottom:0}
table.param-table tbody tr:hover td{background:rgba(255,255,255,.03);color:var(--text)}
table.param-table td:first-child{color:var(--text);font-weight:600}

/* ---------- 时间线 ---------- */
.timeline{list-style:none;margin:28px 0 0;padding:0}
.timeline li{
  position:relative;
  padding:0 0 26px 34px;
  border-left:1px solid var(--line);
  margin-left:7px;
}
.timeline li:last-child{padding-bottom:0;border-left-color:transparent}
.timeline li::before{
  content:"";
  position:absolute;left:-7px;top:6px;
  width:13px;height:13px;border-radius:50%;
  background:var(--bg-0);
  border:2px solid var(--primary);
  box-shadow:0 0 0 4px rgba(31,216,194,.10);
}
.timeline h3{
  font-size:17px;font-weight:700;margin:0 0 6px;
}
.timeline h3 span{
  font-family:var(--font-num);
  color:var(--accent);
  font-size:13px;
  margin-right:8px;
  font-weight:700;
}
.timeline p{margin:0;color:var(--text-2);font-size:15px}

/* ---------- 卡片网格 ---------- */
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  margin-top:26px;
}
.info-card{
  padding:26px;
  border-radius:var(--r-lg);
  background:var(--bg-1);
  border:1px solid var(--line);
  transition:all .2s ease-out;
}
.info-card:hover{
  transform:translateY(-2px);
  border-color:var(--line-strong);
  box-shadow:var(--sh-m);
}
.info-card .ico{
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  border-radius:var(--r-md);
  color:var(--primary);
  background:var(--primary-soft);
  border:1px solid var(--line-strong);
  margin-bottom:16px;
}
.info-card h3{font-size:18px;font-weight:700;margin-bottom:8px}
.info-card p{color:var(--text-2);font-size:15px;margin:0}

/* ---------- FAQ ---------- */
.faq-wrap{
  max-width:900px;
  border-top:1px solid var(--line);
}
.faq-item{
  position:relative;
  border-bottom:1px solid var(--line);
}
.faq-item::before{
  content:"";
  position:absolute;left:0;top:12px;bottom:12px;
  width:3px;border-radius:2px;
  background:var(--primary);
  opacity:0;
  transition:opacity .2s ease-out;
}
.faq-item.open::before{opacity:1}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0 20px 16px;
  background:none;border:0;
  text-align:left;
  font-size:17px;font-weight:600;
  color:var(--text);
  transition:color .2s ease-out;
}
.faq-q:hover{color:var(--primary)}
.faq-item.open .faq-q{color:var(--primary)}
.faq-icon{
  flex:0 0 20px;
  width:20px;height:20px;
  position:relative;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;background:currentColor;border-radius:2px;
  transition:transform .2s ease-out,opacity .2s ease-out;
}
.faq-icon::before{left:0;right:0;top:9px;height:2px}
.faq-icon::after{top:0;bottom:0;left:9px;width:2px}
.faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s ease-out;
}
.faq-a p{
  padding:0 44px 22px 16px;
  margin:0;
  color:var(--text-2);
  font-size:15.5px;
}

/* ---------- CTA ---------- */
.cta-band{
  margin:0 0 8px;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(31,216,194,.10) 0%,rgba(14,44,56,.9) 46%,rgba(10,33,43,.95) 100%);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  padding:40px;
  display:grid;
  grid-template-columns:1.15fr 1fr;
  gap:40px;
  align-items:center;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;right:-60px;top:-60px;
  width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(240,152,60,.20),transparent 68%);
}
.cta-band h2{
  font-size:clamp(22px,2.6vw,30px);
  line-height:1.35;margin-bottom:12px;
}
.cta-band p{color:var(--text-2);margin:0}
.cta-side{position:relative;z-index:2}
.cta-steps{
  list-style:none;margin:0 0 22px;padding:0;
  display:grid;gap:12px;
}
.cta-steps li{
  display:flex;gap:12px;align-items:flex-start;
  font-size:15px;color:var(--text-2);
}
.cta-steps .dot{
  flex:0 0 22px;height:22px;margin-top:3px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid var(--line-strong);
  color:var(--primary);
  font-size:12px;font-family:var(--font-num);font-weight:700;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:96px;
  background:#04121a;
  border-top:1px solid var(--line);
  position:relative;
  padding-top:64px;
}
.site-footer::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,216,194,.75),rgba(240,152,60,.5),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{
  color:var(--text-3);
  font-size:14px;
  line-height:1.8;
  max-width:32em;
  margin:0;
}
.footer-col h4{
  font-size:15px;
  font-weight:700;
  margin-bottom:16px;
  color:var(--text);
}
.footer-col a,.footer-col li{
  display:block;
  color:var(--text-3);
  font-size:14px;
  line-height:1.9;
  transition:color .2s ease-out;
}
.footer-col a:hover{color:var(--primary)}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding:20px 0 28px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--primary)}

/* ---------- 回到顶部 ---------- */
.back-top{
  position:fixed;right:24px;bottom:28px;z-index:90;
  width:46px;height:46px;
  display:flex;align-items:center;justify-content:center;
  border-radius:var(--r-md);
  background:rgba(10,33,43,.9);
  border:1px solid var(--line-strong);
  color:var(--primary);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all .22s ease-out;
}
.back-top.show{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:var(--primary-soft);transform:translateY(-2px)}

/* ---------- 断点 ---------- */
@media screen and (max-width:1439px){
  .container{max-width:1140px}
}
@media screen and (max-width:1199px){
  .header-right{gap:16px}
  .main-nav{gap:16px}
  .nav-link{font-size:14px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band{grid-template-columns:1fr;gap:28px;padding:32px}
}
@media screen and (max-width:991px){
  .main-nav,.nav-cta{display:none}
  .nav-toggle{display:flex}
  .nav-search{max-width:none;flex:1 1 auto}
  .section{padding:72px 0}
  .section-sm{padding:56px 0}
  .doc-grid{padding-top:56px}
  .toc-card{position:static;margin-bottom:34px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .stat-item:nth-child(2){border-right:0}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:18px}
}
@media screen and (max-width:767px){
  :root{--header-h:64px}
  body{font-size:15px}
  .container{padding-left:16px;padding-right:16px}
  .header-inner{gap:12px}
  .brand-text{font-size:16px}
  .nav-search{
    position:absolute;left:16px;right:16px;top:calc(100% + 8px);
    max-width:none;margin:0;
  }
  .search-form{height:44px;box-shadow:var(--sh-m)}
  .site-header{padding-bottom:0}
  .page-hero{padding:44px 0 48px}
  .page-hero h1{margin-top:12px}
  .lede{font-size:15.5px}
  .hero-actions .btn{flex:1 1 100%}
  .anchor-chips{padding:14px}
  .section{padding:56px 0}
  .section-head{margin-bottom:28px}
  .card-grid{grid-template-columns:1fr;gap:20px}
  .doc-block{margin-bottom:44px}
  .doc-figure img{height:200px}
  .param-card .param-head{padding:14px 18px}
  table.param-table th,table.param-table td{padding:12px 18px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .footer-bottom{justify-content:flex-start}
  .cta-band{padding:24px}
  .cta-actions .btn{flex:1 1 100%}
  .back-top{right:16px;bottom:18px}
}
@media screen and (max-width:520px){
  .stat-strip{grid-template-columns:1fr;padding:20px 6px}
  .stat-item{border-right:0;border-bottom:1px solid var(--line);padding:14px 18px;margin:0}
  .stat-item:last-child{border-bottom:0}
  .stat-item:nth-child(1),.stat-item:nth-child(2){margin-bottom:0;padding-bottom:14px}
  .faq-q{font-size:16px;padding-right:0}
  .faq-a p{padding-right:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --bg-0:#06171E;
  --bg-1:#0A212B;
  --bg-2:#0E2C38;
  --bg-glass:rgba(255,255,255,.06);
  --primary:#1FD8C2;
  --primary-deep:#0E8F86;
  --primary-soft:rgba(31,216,194,.14);
  --accent:#F0983C;
  --accent-soft:rgba(240,152,60,.14);
  --text:#E9F4F3;
  --text-2:#9DB5B8;
  --text-3:#6C878C;
  --text-invert:#05161C;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(31,216,194,.35);
  --success:#3FD08A;
  --error:#E2604F;
  --r-sm:6px;
  --r-md:12px;
  --r-lg:20px;
  --r-pill:999px;
  --shadow-sm:0 1px 2px rgba(0,0,0,.30);
  --shadow-md:0 12px 32px rgba(0,0,0,.35);
  --glow:0 0 0 1px rgba(31,216,194,.35),0 8px 24px rgba(31,216,194,.22);
  --ease:all .2s ease-out;
  --maxw:1240px;
}

*,*::before,*::after{box-sizing:border-box;}

html{scroll-behavior:smooth;}

body{
  margin:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img{max-width:100%;height:auto;display:block;border-style:none;}
a{color:var(--primary);text-decoration:none;transition:var(--ease);}
a:hover{color:#5BE7D6;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
  border-radius:var(--r-sm);
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;}
hr{border:0;border-top:1px solid var(--line);margin:0;}

.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.grid-container{max-width:var(--maxw);padding-left:24px;padding-right:24px;}

/* ---------- 通用文字层级 ---------- */
.h1{font-size:clamp(32px,5vw,56px);line-height:1.2;font-weight:800;letter-spacing:-.01em;}
.h2{font-size:clamp(24px,3.2vw,36px);line-height:1.3;font-weight:700;letter-spacing:-.005em;}
.h3{font-size:21px;line-height:1.4;font-weight:700;}
.h4{font-size:17px;line-height:1.5;font-weight:600;}
.lead{font-size:17px;line-height:1.9;color:var(--text-2);}
.muted{color:var(--text-2);}
.dim{color:var(--text-3);font-size:14px;line-height:1.6;}
.mono-num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

.section{padding:112px 0;position:relative;}
.section--tight{padding:88px 0;}
.section--alt{background:var(--bg-1);}
.section-head{margin-bottom:40px;}
.section-head .h2{margin-bottom:14px;}
.section-head .lead{max-width:760px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.12em;
  color:var(--primary);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{
  content:"";width:22px;height:1px;background:var(--primary);display:inline-block;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:11px 24px;
  border-radius:var(--r-md);
  font-size:15px;font-weight:600;line-height:1.2;
  transition:var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:var(--primary);
  color:var(--text-invert);
  box-shadow:var(--glow);
}
.btn-primary:hover{
  background:#38e3cf;
  color:var(--text-invert);
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(31,216,194,.45),0 14px 28px rgba(31,216,194,.30);
}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  border:1px solid var(--line-strong);
  color:var(--primary);
  background:transparent;
}
.btn-ghost:hover{
  background:var(--primary-soft);
  color:var(--primary);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{min-height:38px;padding:8px 18px;font-size:14px;}
.btn-block{width:100%;}

.text-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-size:14px;font-weight:600;
}
.text-link svg{transition:transform .2s ease-out;}
.text-link:hover svg{transform:translateX(4px);}

/* ---------- 标签 / 徽章 ---------- */
.tag{
  display:inline-block;
  padding:4px 12px;
  border-radius:var(--r-pill);
  font-size:13px;font-weight:600;line-height:1.6;
  background:var(--primary-soft);
  color:var(--primary);
}
.tag-accent{background:var(--accent-soft);color:var(--accent);}
.badge{
  display:inline-block;padding:3px 10px;border-radius:var(--r-sm);
  border:1px solid var(--line);color:var(--text-2);font-size:12px;
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,23,30,.55);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid transparent;
  transition:var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,23,30,.94);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;align-items:center;gap:22px;
  min-height:88px;
  transition:var(--ease);
}
.site-header.is-scrolled .header-inner{min-height:68px;}

.brand{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--text);flex:0 0 auto;
}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line-strong);
  background:var(--primary-soft);
  color:var(--primary);
  flex:0 0 auto;
}
.brand-text{
  font-size:17px;font-weight:800;letter-spacing:.01em;
  white-space:nowrap;
}
.brand:hover{color:var(--text);}

.nav-search{flex:1 1 40%;min-width:0;position:relative;}
.search-form{
  display:flex;align-items:center;gap:8px;
  height:46px;padding:0 6px 0 16px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  transition:var(--ease);
}
.search-form:focus-within{
  border-color:var(--primary);
  box-shadow:0 0 0 1px rgba(31,216,194,.35),0 8px 24px rgba(31,216,194,.18);
  background:rgba(255,255,255,.07);
}
.search-icon{color:var(--text-3);display:inline-flex;flex:0 0 auto;}
.search-input{
  flex:1 1 auto;min-width:0;
  height:100%;border:0;background:transparent;
  color:var(--text);font-size:14px;outline:none;
}
.search-input::placeholder{color:var(--text-3);}
.search-btn{
  flex:0 0 auto;
  height:34px;padding:0 18px;
  border-radius:var(--r-pill);
  background:var(--primary);color:var(--text-invert);
  font-size:13px;font-weight:700;
  box-shadow:0 0 0 1px rgba(31,216,194,.35),0 6px 16px rgba(31,216,194,.20);
  transition:var(--ease);
}
.search-btn:hover{background:#38e3cf;}

.hot-words{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  padding:7px 4px 0 16px;
  font-size:12px;color:var(--text-3);
}
.hot-words a{
  padding:2px 10px;border-radius:var(--r-pill);
  border:1px solid var(--line-strong);
  color:var(--primary);font-size:12px;line-height:1.7;
}
.hot-words a:hover{background:var(--primary-soft);}
.site-header.is-scrolled .hot-words{display:none;}

.main-nav{
  display:flex;align-items:center;gap:4px;flex:0 0 auto;
}
.nav-link{
  position:relative;
  padding:8px 12px;
  border-radius:var(--r-sm);
  font-size:14px;font-weight:500;color:var(--text-2);
  white-space:nowrap;
  transition:var(--ease);
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05);}
.nav-link.active{color:var(--primary);}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;
  height:2px;border-radius:2px;background:var(--primary);
  box-shadow:0 0 10px rgba(31,216,194,.7);
}
.nav-cta{flex:0 0 auto;}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  color:var(--text);
  align-items:center;justify-content:center;
  flex:0 0 auto;
}
.nav-toggle span{
  display:block;width:18px;height:2px;background:currentColor;border-radius:2px;
  position:relative;
}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

.nav-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:rgba(6,23,30,.98);
  padding:18px 24px 26px;
}
.nav-drawer.open{display:block;}
.nav-drawer .search-form{margin-bottom:16px;}
.nav-drawer .nav-link{
  display:block;padding:12px 4px;font-size:16px;
  border-bottom:1px solid var(--line);
}
.nav-drawer .nav-link.active::after{display:none;}
.nav-drawer .btn{margin-top:18px;}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--text-2);
}
.crumbs a{color:var(--text-2);}
.crumbs a:hover{color:var(--primary);}
.crumbs .sep{color:var(--text-3);}
.crumbs .current{color:var(--primary);font-weight:600;}

/* ---------- 页面横幅 ---------- */
.page-hero{
  position:relative;
  padding:64px 0 84px;
  background-image:
    linear-gradient(115deg,rgba(6,23,30,.96) 0%,rgba(6,23,30,.86) 46%,rgba(6,23,30,.62) 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(31,216,194,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(31,216,194,.07) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.75;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.page-hero h1{margin:22px 0 20px;max-width:900px;}
.page-hero h1 .hl{color:var(--primary);}
.page-hero .lead{max-width:820px;}

.anchor-chips{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:30px;
}
.anchor-chips a{
  padding:8px 16px;border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--bg-glass);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  color:var(--text-2);font-size:13px;font-weight:600;
}
.anchor-chips a:hover{
  border-color:var(--line-strong);color:var(--primary);
  background:var(--primary-soft);transform:translateY(-2px);
}

.hero-facts{
  display:flex;flex-wrap:wrap;gap:32px;
  margin-top:38px;padding:22px 28px;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:var(--bg-glass);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}
.hero-facts .fact{min-width:140px;}
.hero-facts .fact b{
  display:block;font-size:26px;font-weight:800;color:var(--accent);
  text-shadow:0 0 18px rgba(240,152,60,.45);
  font-variant-numeric:tabular-nums;
}
.hero-facts .fact span{font-size:13px;color:var(--text-2);}

/* ---------- 图文交替 ---------- */
.zigzag-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.zigzag-row + .zigzag-row{margin-top:96px;}
.zigzag-row.reverse .zigzag-media{order:2;}
.zigzag-row.reverse .zigzag-body{order:1;}

.zigzag-media{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-md);
}
.zigzag-media img{
  width:100%;height:100%;
  aspect-ratio:4/3;object-fit:cover;
  transition:transform .5s ease-out;
}
.zigzag-media:hover img{transform:scale(1.03);}
.zigzag-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,23,30,0) 40%,rgba(6,23,30,.62) 100%);
  pointer-events:none;
}
.zigzag-media .media-cap{
  position:absolute;left:20px;bottom:16px;z-index:2;
  font-size:13px;color:var(--text);font-weight:600;letter-spacing:.02em;
}

.zigzag-body .step-index{
  display:inline-flex;align-items:center;
  font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--accent);margin-bottom:12px;
}
.zigzag-body h3{margin-bottom:16px;}
.zigzag-body p{color:var(--text-2);margin-bottom:16px;}
.check-list{display:grid;gap:12px;margin-top:20px;}
.check-list li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:15px;color:var(--text-2);line-height:1.7;
}
.check-list li svg{flex:0 0 auto;margin-top:5px;color:var(--primary);}

/* ---------- 参数表卡片 ---------- */
.spec-panel{
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:var(--bg-2);
  box-shadow:var(--shadow-md);
  overflow:hidden;
}
.spec-panel-head{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 28px;
  border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.03);
}
.spec-scroll{overflow-x:auto;}
.spec-table{
  width:100%;min-width:720px;
  border-collapse:collapse;
}
.spec-table th,.spec-table td{
  padding:18px 28px;
  text-align:left;
  border-bottom:1px solid var(--line);
  font-size:15px;line-height:1.7;
  vertical-align:top;
}
.spec-table th{
  width:220px;
  color:var(--primary);
  font-weight:600;
  background:rgba(31,216,194,.05);
  white-space:nowrap;
}
.spec-table td{color:var(--text-2);}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:0;}
.spec-table tbody tr:hover th,
.spec-table tbody tr:hover td{background:rgba(255,255,255,.025);}

.spec-cards{display:none;gap:14px;}
.spec-card{
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--bg-2);
  padding:16px 18px;
}
.spec-card dt{
  font-size:13px;font-weight:700;color:var(--primary);margin-bottom:6px;
}
.spec-card dd{margin:0;font-size:15px;color:var(--text-2);line-height:1.75;}

/* ---------- 作业流程 ---------- */
.timeline{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:0;
  margin-top:12px;
  position:relative;
}
.timeline::before{
  content:"";
  position:absolute;left:6%;right:6%;top:26px;
  height:1px;background:linear-gradient(90deg,rgba(31,216,194,.55),rgba(240,152,60,.45));
}
.tl-node{
  position:relative;padding:0 18px;text-align:center;
}
.tl-node .dot{
  width:52px;height:52px;margin:0 auto 20px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg-1);
  border:1px solid var(--line-strong);
  color:var(--primary);
  font-weight:800;font-size:15px;
  box-shadow:0 0 0 6px rgba(6,23,30,.9);
  position:relative;z-index:2;
}
.tl-node h4{margin-bottom:8px;color:var(--text);}
.tl-node p{font-size:14px;color:var(--text-2);line-height:1.7;}

/* ---------- 场景卡片 ---------- */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  margin-top:8px;
}
.scene-card{
  padding:28px;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--bg-2);
  transition:var(--ease);
}
.scene-card:hover{
  transform:translateY(-2px);
  border-color:var(--line-strong);
  box-shadow:var(--shadow-md);
}
.scene-card .icon{
  width:44px;height:44px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line-strong);
  color:var(--primary);
  background:rgba(31,216,194,.07);
  margin-bottom:18px;
}
.scene-card h3{font-size:18px;margin-bottom:10px;}
.scene-card p{font-size:14.5px;color:var(--text-2);line-height:1.75;}

/* ---------- FAQ ---------- */
.faq-wrap{
  display:grid;grid-template-columns:320px 1fr;gap:56px;
  align-items:start;
}
.faq-aside h2{margin-bottom:16px;}
.faq-aside p{color:var(--text-2);font-size:15px;margin-bottom:24px;}
.faq-anchor-list{display:grid;gap:10px;}
.faq-anchor-list a{
  display:block;font-size:14px;color:var(--text-2);
  padding:8px 14px;border-left:2px solid var(--line);
  transition:var(--ease);
}
.faq-anchor-list a:hover{
  color:var(--primary);border-left-color:var(--primary);
  background:linear-gradient(90deg,rgba(31,216,194,.12),transparent);
}

.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);position:relative;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 8px 22px 0;
  text-align:left;
  font-size:17px;font-weight:600;color:var(--text);
  transition:var(--ease);
}
.faq-q:hover{color:var(--primary);}
.faq-item.open .faq-q{color:var(--primary);}
.faq-q .sign{
  flex:0 0 auto;width:22px;height:22px;position:relative;
}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;
  transition:var(--ease);
}
.faq-q .sign::before{left:0;top:10px;width:22px;height:2px;}
.faq-q .sign::after{left:10px;top:0;width:2px;height:22px;}
.faq-item.open .faq-q .sign::after{transform:rotate(90deg);opacity:0;}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .28s ease-out;
}
.faq-a-inner{
  padding:0 40px 24px 20px;
  font-size:15.5px;color:var(--text-2);line-height:1.85;
  border-left:3px solid transparent;
}
.faq-item.open .faq-a-inner{
  border-left-color:var(--primary);
  padding-left:20px;
}

/* ---------- CTA ---------- */
.cta-band{
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:
    linear-gradient(120deg,rgba(31,216,194,.10),rgba(240,152,60,.06) 70%,transparent),
    var(--bg-glass);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  padding:48px;
  display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:center;
  box-shadow:var(--shadow-md);
}
.cta-band h2{margin-bottom:14px;}
.cta-band p{color:var(--text-2);font-size:15.5px;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}

.cta-links{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:26px;
}
.cta-link-card{
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:22px 24px;
  background:var(--bg-2);
  transition:var(--ease);
  display:block;
}
.cta-link-card:hover{
  transform:translateY(-2px);
  border-color:var(--line-strong);
  box-shadow:var(--shadow-md);
}
.cta-link-card strong{display:block;color:var(--text);font-size:16px;margin-bottom:8px;}
.cta-link-card span{font-size:14px;color:var(--text-2);line-height:1.7;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#04121A;
  border-top:1px solid var(--line);
  position:relative;
  padding:72px 0 0;
}
.site-footer::before{
  content:"";
  position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,216,194,.6),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{
  color:var(--text-2);font-size:14px;line-height:1.85;max-width:340px;
}
.footer-col h4{
  font-size:14px;font-weight:700;color:var(--text);
  margin-bottom:18px;letter-spacing:.04em;
}
.footer-col a{
  display:block;color:var(--text-2);font-size:14px;
  padding:6px 0;
}
.footer-col a:hover{color:var(--primary);}
.footer-col ul li{
  color:var(--text-2);font-size:14px;padding:6px 0;line-height:1.7;
}
.footer-bottom{
  margin-top:56px;
  padding:22px 0 26px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--primary);}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  border:1px solid var(--line-strong);
  background:rgba(10,33,43,.9);
  color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--primary-soft);box-shadow:var(--glow);}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease-out,transform .6s ease-out;}
.reveal.in{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation:none !important;}
}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1439px){
  :root{--maxw:1140px;}
}
@media screen and (max-width:1199px){
  .main-nav{gap:0;}
  .nav-link{padding:8px 9px;font-size:13.5px;}
  .hot-words{display:none;}
  .faq-wrap{grid-template-columns:1fr;gap:36px;}
  .faq-anchor-list{display:none;}
  .timeline{grid-template-columns:repeat(3,1fr);row-gap:36px;}
  .timeline::before{display:none;}
}
@media screen and (max-width:991px){
  .section{padding:88px 0;}
  .zigzag-row{grid-template-columns:1fr;gap:32px;}
  .zigzag-row.reverse .zigzag-media{order:1;}
  .zigzag-row.reverse .zigzag-body{order:2;}
  .zigzag-row + .zigzag-row{margin-top:72px;}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .cta-band{grid-template-columns:1fr;padding:36px;}
  .cta-actions{justify-content:flex-start;}
  .cta-links{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media screen and (max-width:767px){
  .container{padding-left:16px;padding-right:16px;}
  .grid-container{padding-left:16px;padding-right:16px;}
  .section{padding:56px 0;}
  .section--tight{padding:56px 0;}
  .header-inner{min-height:64px;gap:12px;}
  .site-header.is-scrolled .header-inner{min-height:60px;}
  .main-nav,.nav-cta{display:none;}
  .nav-toggle{display:flex;}
  .nav-search{display:none;}
  .nav-drawer .nav-search{display:block;flex:1 1 auto;}
  .header-inner{flex-wrap:wrap;}
  .page-hero{padding:40px 0 56px;}
  .hero-facts{gap:20px;padding:18px 20px;}
  .hero-facts .fact{min-width:120px;}
  .spec-table{display:none;}
  .spec-cards{display:grid;}
  .spec-panel{border:0;background:transparent;box-shadow:none;}
  .spec-panel-head{padding:0 0 20px;background:transparent;border-bottom:1px solid var(--line);}
  .scene-grid{grid-template-columns:1fr;}
  .timeline{grid-template-columns:1fr;row-gap:28px;}
  .tl-node{text-align:left;padding:0 0 0 70px;min-height:52px;}
  .tl-node .dot{position:absolute;left:0;top:0;margin:0;}
  .faq-q{font-size:16px;padding:18px 4px 18px 0;}
  .cta-band{padding:28px 22px;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .to-top{right:16px;bottom:18px;}
}
@media screen and (max-width:480px){
  .btn{min-width:160px;}
  .btn-block,.cta-actions .btn{min-width:0;}
  .hero-facts .fact b{font-size:22px;}
}

/* roulang page: category3 */
:root{
  --bg-0:#06171E;
  --bg-1:#0A212B;
  --bg-2:#0E2C38;
  --bg-glass:rgba(255,255,255,.06);
  --primary:#1FD8C2;
  --primary-deep:#0E8F86;
  --primary-soft:rgba(31,216,194,.14);
  --accent:#F0983C;
  --text:#E9F4F3;
  --text-2:#9DB5B8;
  --text-3:#6C878C;
  --text-invert:#05161C;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(31,216,194,.35);
  --success:#3FD08A;
  --warn:#F0983C;
  --error:#E2604F;
  --r-sm:6px;
  --r-md:12px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-sm:0 1px 2px rgba(0,0,0,.30);
  --sh-md:0 12px 32px rgba(0,0,0,.35);
  --sh-glow:0 0 0 1px rgba(31,216,194,.35), 0 8px 24px rgba(31,216,194,.22);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
svg{display:block;}
::selection{background:var(--primary-soft);color:var(--text);}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}

.grid-container{max-width:1240px;padding-left:24px;padding-right:24px;margin:0 auto;}
@media (min-width:1200px) and (max-width:1439px){
  .grid-container{max-width:1140px;}
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(6,23,30,.74);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
  transition:background .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
}
.site-header.is-stuck{
  background:rgba(6,23,30,.95);
  box-shadow:var(--sh-md);
  border-bottom-color:var(--line-strong);
}
.header-main{
  display:flex;align-items:center;gap:18px;
  min-height:88px;
  transition:min-height .2s ease-out;
}
.is-stuck .header-main{min-height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);
  background:var(--primary-soft);
  border:1px solid var(--line-strong);
  box-shadow:0 0 18px rgba(31,216,194,.16);
}
.brand-text{font-size:18px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;}

.nav-search{
  position:relative;
  flex:1 1 40%;
  max-width:540px;
  display:flex;align-items:center;
  height:46px;
  padding:0 6px 0 44px;
  border-radius:var(--r-pill);
  background:var(--bg-glass);
  border:1px solid var(--line);
  transition:border-color .2s ease-out, box-shadow .2s ease-out, background .2s ease-out;
}
.nav-search:focus-within{
  border-color:var(--primary);
  box-shadow:0 0 0 3px var(--primary-soft), 0 0 22px rgba(31,216,194,.18);
  background:rgba(255,255,255,.08);
}
.search-ico{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--text-3);}
.nav-search:focus-within .search-ico{color:var(--primary);}
.nav-search input{
  flex:1 1 auto;min-width:0;height:100%;
  background:transparent;border:0;outline:none;
  color:var(--text);font-size:14.5px;
}
.nav-search input::placeholder{color:var(--text-3);}
.search-btn{
  flex:0 0 auto;
  height:34px;padding:0 18px;
  border:0;border-radius:var(--r-pill);
  background:var(--primary);color:var(--text-invert);
  font-size:14px;font-weight:700;
  cursor:pointer;
  box-shadow:var(--sh-glow);
  transition:all .2s ease-out;
}
.search-btn:hover{filter:brightness(1.08);}
.search-btn:active{transform:translateY(1px);}

.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto;}
.nav-link{
  position:relative;
  padding:9px 11px;
  font-size:15px;color:var(--text-2);
  border-radius:var(--r-sm);
  white-space:nowrap;
  transition:all .2s ease-out;
}
.nav-link:hover{color:var(--text);background:var(--bg-glass);}
.nav-link.active{color:var(--primary);}
.nav-link.active::after{
  content:"";position:absolute;left:11px;right:11px;bottom:1px;height:2px;
  border-radius:2px;background:var(--primary);
  box-shadow:0 0 12px rgba(31,216,194,.75);
}
.nav-cta{
  flex:0 0 auto;margin-left:6px;
  padding:10px 18px;border-radius:var(--r-pill);
  background:var(--primary);color:var(--text-invert);
  font-size:14px;font-weight:700;white-space:nowrap;
  box-shadow:var(--sh-glow);
  transition:all .2s ease-out;
}
.nav-cta:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(31,216,194,.5), 0 10px 28px rgba(31,216,194,.28);}
.nav-cta:active{transform:translateY(0);}

.search-chips{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  padding:0 0 13px;
  font-size:13px;color:var(--text-3);
  transition:max-height .2s ease-out, opacity .2s ease-out, padding .2s ease-out;
  max-height:60px;overflow:hidden;
}
.is-stuck .search-chips{max-height:0;opacity:0;padding-bottom:0;}
.chip{
  padding:4px 12px;border-radius:var(--r-pill);
  border:1px solid var(--line-strong);
  color:var(--primary);font-size:13px;
  transition:all .2s ease-out;
}
.chip:hover{background:var(--primary-soft);border-color:var(--primary);}

.nav-toggle{
  display:none;
  width:44px;height:44px;flex:0 0 auto;
  align-items:center;justify-content:center;
  background:var(--bg-glass);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  color:var(--text);cursor:pointer;
  transition:all .2s ease-out;
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--primary);}
.nav-toggle .bar{display:block;width:20px;height:2px;background:currentColor;border-radius:2px;position:relative;}
.nav-toggle .bar::before,
.nav-toggle .bar::after{content:"";position:absolute;left:0;width:20px;height:2px;background:currentColor;border-radius:2px;}
.nav-toggle .bar::before{top:-6px;}
.nav-toggle .bar::after{top:6px;}

.mobile-panel{
  display:none;
  border-top:1px solid var(--line);
  background:rgba(6,23,30,.98);
  padding:16px 0 24px;
}
.mobile-panel.open{display:block;}
.mobile-panel .m-search{display:flex;gap:8px;margin-bottom:16px;}
.mobile-panel .m-search input{
  flex:1;height:46px;padding:0 16px;border-radius:var(--r-pill);
  background:var(--bg-glass);border:1px solid var(--line);color:var(--text);outline:none;
}
.mobile-panel .m-search input:focus{border-color:var(--primary);}
.mobile-nav{display:flex;flex-direction:column;}
.mobile-nav a{
  padding:13px 4px;font-size:16px;color:var(--text-2);
  border-bottom:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:center;
  transition:all .2s ease-out;
}
.mobile-nav a:hover,.mobile-nav a.active{color:var(--primary);}
.mobile-nav a .dot{width:6px;height:6px;border-radius:50%;background:var(--primary);opacity:0;transition:opacity .2s ease-out;}
.mobile-nav a.active .dot{opacity:1;}
.mobile-cta{
  display:block;margin-top:18px;text-align:center;
  padding:13px;border-radius:var(--r-pill);
  background:var(--primary);color:var(--text-invert);font-weight:700;
  box-shadow:var(--sh-glow);
}

/* ============ 通用 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-md);
  font-size:15px;font-weight:700;
  cursor:pointer;border:1px solid transparent;
  transition:all .2s ease-out;
  min-height:48px;
}
.btn-primary{
  background:var(--primary);color:var(--text-invert);
  box-shadow:var(--sh-glow);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(31,216,194,.5), 0 12px 28px rgba(31,216,194,.28);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;color:var(--primary);
  border:1px solid var(--line-strong);
}
.btn-ghost:hover{background:var(--primary-soft);border-color:var(--primary);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}

.text-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-size:14px;font-weight:600;
  transition:all .2s ease-out;
}
.text-link .arrow{transition:transform .2s ease-out;}
.text-link:hover .arrow{transform:translateX(4px);}

.badge{
  display:inline-flex;align-items:center;
  padding:3px 10px;border-radius:var(--r-sm);
  background:var(--primary-soft);color:var(--primary);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.badge-accent{background:rgba(240,152,60,.14);color:var(--accent);}

.section{padding:104px 0;position:relative;}
.section-alt{background:var(--bg-1);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--primary);text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--primary);}
.section-title{font-size:clamp(24px,3.2vw,36px);font-weight:700;line-height:1.3;}
.section-desc{margin-top:16px;color:var(--text-2);font-size:16px;line-height:1.9;}

/* ============ 面包屑 ============ */
.crumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13.5px;color:var(--text-3);
  margin-bottom:26px;
}
.crumb a{color:var(--text-3);transition:color .2s ease-out;}
.crumb a:hover{color:var(--primary);}
.crumb .sep{color:var(--primary);}
.crumb .now{color:var(--text-2);}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  padding:56px 0 88px;
  background:
    linear-gradient(105deg, rgba(6,23,30,.96) 0%, rgba(6,23,30,.86) 46%, rgba(8,32,42,.74) 100%),
    url("/assets/images/backpic/back-1.png") center/cover no-repeat;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(31,216,194,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31,216,194,.055) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg, rgba(0,0,0,.75), rgba(0,0,0,0));
  -webkit-mask-image:linear-gradient(180deg, rgba(0,0,0,.75), rgba(0,0,0,0));
}
.hero .grid-container{position:relative;z-index:2;}
.hero-title{
  font-size:clamp(32px,5vw,56px);
  font-weight:800;line-height:1.2;
  letter-spacing:-.01em;
  margin-bottom:22px;
}
.hero-title .hl{color:var(--primary);}
.hero-lead{
  max-width:640px;
  color:var(--text-2);font-size:17px;line-height:1.95;
  margin-bottom:14px;
}
.hero-lead + .hero-lead{margin-bottom:0;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}

.hero-panel{
  border-radius:var(--r-lg);
  background:var(--bg-glass);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border:1px solid var(--line);
  padding:18px;
  box-shadow:var(--sh-md);
}
.hero-panel img{
  width:100%;height:258px;object-fit:cover;
  border-radius:var(--r-md);
}
.hero-facts{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:10px;margin-top:16px;
}
.hero-fact{
  padding:12px 10px;border-radius:var(--r-md);
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  text-align:center;
}
.hero-fact strong{display:block;font-size:15px;color:var(--primary);font-weight:700;}
.hero-fact span{display:block;font-size:12.5px;color:var(--text-3);margin-top:2px;}

.anchor-bar{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-top:44px;
  padding:14px 18px;
  border-radius:var(--r-lg);
  background:var(--bg-glass);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border:1px solid var(--line);
}
.anchor-bar .label{font-size:13.5px;color:var(--text-3);margin-right:4px;display:flex;align-items:center;}
.anchor-link{
  padding:7px 15px;border-radius:var(--r-pill);
  border:1px solid var(--line);
  font-size:13.5px;color:var(--text-2);
  transition:all .2s ease-out;
}
.anchor-link:hover{border-color:var(--line-strong);color:var(--primary);background:var(--primary-soft);}

/* ============ 卡片矩阵 ============ */
.matrix-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.m-card{
  position:relative;
  padding:28px 26px;
  border-radius:var(--r-md);
  background:var(--bg-2);
  border:1px solid var(--line);
  box-shadow:var(--sh-sm);
  transition:all .2s ease-out;
  overflow:hidden;
}
.m-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg, var(--primary), rgba(31,216,194,0));
  opacity:.5;transition:opacity .2s ease-out;
}
.m-card:hover{
  transform:translateY(-2px);
  border-color:var(--line-strong);
  box-shadow:var(--sh-md);
}
.m-card:hover::before{opacity:1;}
.m-ico{
  width:44px;height:44px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);
  background:var(--primary-soft);
  border:1px solid var(--line-strong);
  margin-bottom:18px;
}
.m-card h3{font-size:19px;font-weight:700;line-height:1.45;margin-bottom:10px;}
.m-card p{color:var(--text-2);font-size:15px;line-height:1.85;margin-bottom:16px;}
.m-tags{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:18px;}
.m-tags span{
  font-size:12.5px;color:var(--text-3);
  padding:3px 9px;border-radius:var(--r-sm);
  border:1px solid var(--line);
}
.m-card .text-link{margin-top:auto;}

/* ============ 时间线 ============ */
.timeline-wrap{
  margin-top:12px;
  padding:36px 34px;
  border-radius:var(--r-lg);
  background:var(--bg-glass);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border:1px solid var(--line);
}
.timeline{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:18px;}
.timeline::before{
  content:"";position:absolute;top:19px;left:6%;right:6%;height:1px;
  background:linear-gradient(90deg, rgba(31,216,194,.5), rgba(31,216,194,.12));
}
.tl-item{position:relative;padding-top:52px;text-align:left;}
.tl-node{
  position:absolute;top:6px;left:0;
  width:28px;height:28px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg-0);border:1px solid var(--line-strong);
  color:var(--primary);font-size:12.5px;font-weight:700;
  z-index:2;
}
.tl-item:first-child .tl-node{
  background:var(--primary);color:var(--text-invert);
  box-shadow:0 0 18px rgba(31,216,194,.5);
}
.tl-item h3{font-size:17px;font-weight:700;margin-bottom:8px;}
.tl-item p{color:var(--text-2);font-size:14.5px;line-height:1.8;}
.tl-item .tl-time{
  display:inline-block;margin-top:10px;
  font-size:12.5px;color:var(--accent);
  font-variant-numeric:tabular-nums;
}

/* ============ 适用品类 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.scene-item{
  padding:22px 20px;
  border-radius:var(--r-md);
  background:var(--bg-2);
  border:1px solid var(--line);
  transition:all .2s ease-out;
}
.scene-item:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:var(--sh-md);}
.scene-item img{
  width:100%;height:132px;object-fit:cover;
  border-radius:var(--r-sm);margin-bottom:16px;
}
.scene-item h3{font-size:16.5px;font-weight:700;margin-bottom:8px;}
.scene-item p{color:var(--text-2);font-size:14px;line-height:1.8;}

/* ============ 单证表 ============ */
.doc-panel{
  border-radius:var(--r-lg);
  background:var(--bg-2);
  border:1px solid var(--line);
  overflow:hidden;
}
.doc-head{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:22px 26px;
  border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.03);
}
.doc-head h3{font-size:19px;font-weight:700;}
.doc-head span{font-size:13.5px;color:var(--text-3);}
.table-scroll{width:100%;overflow-x:auto;}
table.doc-table{width:100%;border-collapse:collapse;min-width:720px;}
table.doc-table th,table.doc-table td{
  padding:15px 22px;text-align:left;font-size:14.5px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
table.doc-table th{
  color:var(--primary);font-weight:700;font-size:13.5px;
  background:rgba(31,216,194,.07);
  white-space:nowrap;
}
table.doc-table td{color:var(--text-2);line-height:1.8;}
table.doc-table td strong{color:var(--text);font-weight:600;}
table.doc-table tr:last-child td{border-bottom:0;}
table.doc-table tr:hover td{background:rgba(255,255,255,.025);}

/* ============ FAQ ============ */
.faq-list{
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:var(--bg-2);
  overflow:hidden;
}
.faq-item{border-bottom:1px solid var(--line);position:relative;}
.faq-item:last-child{border-bottom:0;}
.faq-item::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:var(--primary);border-radius:0 3px 3px 0;
  opacity:0;transition:opacity .2s ease-out;
}
.faq-item.open::before{opacity:1;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 26px;
  background:transparent;border:0;cursor:pointer;
  color:var(--text);text-align:left;
  font-size:17.5px;font-weight:600;line-height:1.5;
  transition:all .2s ease-out;
}
.faq-q:hover{background:rgba(255,255,255,.03);color:var(--primary);}
.faq-icon{
  flex:0 0 auto;position:relative;
  width:20px;height:20px;color:var(--primary);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;
  transition:transform .2s ease-out, opacity .2s ease-out;
}
.faq-icon::before{left:0;top:9px;width:20px;height:2px;}
.faq-icon::after{top:0;left:9px;width:2px;height:20px;}
.faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .28s ease-out;
}
.faq-item.open .faq-a{max-height:340px;}
.faq-a p{
  padding:0 60px 24px 26px;
  color:var(--text-2);font-size:15.5px;line-height:1.95;
}

/* ============ CTA ============ */
.cta-section{padding:96px 0;}
.cta-panel{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--line-strong);
  background:
    linear-gradient(110deg, rgba(9,36,46,.94) 0%, rgba(6,23,30,.86) 58%, rgba(12,44,56,.82) 100%),
    url("/assets/images/backpic/back-3.webp") center/cover no-repeat;
  padding:54px 48px;
  box-shadow:var(--sh-md);
}
.cta-panel::after{
  content:"";position:absolute;right:-70px;top:-70px;width:280px;height:280px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(31,216,194,.20), rgba(31,216,194,0) 68%);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;gap:32px;justify-content:space-between;}
.cta-copy{max-width:640px;}
.cta-copy h2{font-size:clamp(22px,2.8vw,32px);font-weight:700;line-height:1.35;margin-bottom:14px;}
.cta-copy p{color:var(--text-2);font-size:16px;line-height:1.9;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.cta-points{display:flex;flex-wrap:wrap;gap:22px;margin-top:26px;}
.cta-points li{display:flex;align-items:center;gap:8px;color:var(--text-2);font-size:14px;}
.cta-points svg{color:var(--primary);flex:0 0 auto;}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  background:#041116;
  border-top:1px solid var(--line);
  padding-top:66px;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg, rgba(31,216,194,0), rgba(31,216,194,.75), rgba(31,216,194,0));
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:52px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{color:var(--text-3);font-size:14.5px;line-height:1.9;max-width:330px;}
.footer-col h4{
  font-size:15px;font-weight:700;color:var(--text);
  margin-bottom:18px;letter-spacing:.02em;
}
.footer-col a{
  display:block;color:var(--text-3);font-size:14.5px;
  padding:6px 0;
  transition:all .2s ease-out;
}
.footer-col a:hover{color:var(--primary);transform:translateX(3px);}
.footer-col ul li{color:var(--text-3);font-size:14.5px;padding:6px 0;line-height:1.7;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:22px 0 30px;
  border-top:1px solid var(--line);
  color:var(--text-3);font-size:13.5px;
}
.footer-bottom a{color:var(--text-3);transition:color .2s ease-out;}
.footer-bottom a:hover{color:var(--primary);}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(6,23,30,.9);
  border:1px solid var(--line-strong);
  color:var(--primary);cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all .2s ease-out;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--primary-soft);box-shadow:var(--sh-glow);}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .5s ease-out, transform .5s ease-out;}
.reveal.in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .nav-link{font-size:14px;padding:8px 9px;}
  .nav-link.active::after{left:9px;right:9px;}
  .nav-search{max-width:400px;flex-basis:34%;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .footer-grid .footer-col:last-child{grid-column:span 3;}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991px){
  .main-nav{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .header-main{min-height:78px;}
  .is-stuck .header-main{min-height:66px;}
  .nav-search{max-width:none;flex:1 1 auto;}
  .section{padding:80px 0;}
  .matrix-grid{grid-template-columns:repeat(2,1fr);}
  .timeline{grid-template-columns:repeat(2,1fr);gap:24px 20px;}
  .timeline::before{display:none;}
  .tl-item{padding-top:44px;}
  .hero{padding:44px 0 68px;}
  .hero-panel{margin-top:38px;}
  .cta-panel{padding:42px 32px;}
  .cta-inner{gap:24px;}
}
@media (max-width:767px){
  .grid-container{padding-left:16px;padding-right:16px;}
  .header-main{flex-wrap:wrap;gap:12px;padding-top:12px;padding-bottom:12px;min-height:0;}
  .is-stuck .header-main{padding-top:10px;padding-bottom:10px;}
  .nav-search{order:3;flex-basis:100%;max-width:100%;}
  .brand-text{font-size:16.5px;}
  .search-chips{order:4;flex-basis:100%;padding-bottom:4px;}
  .is-stuck .search-chips{display:none;}
  .section{padding:58px 0;}
  .section-head{margin-bottom:30px;}
  .matrix-grid{grid-template-columns:1fr;}
  .scene-grid{grid-template-columns:1fr;}
  .timeline{grid-template-columns:1fr;}
  .hero-title{margin-bottom:16px;}
  .hero-lead{font-size:15.5px;}
  .hero-actions .btn{flex:1 1 auto;}
  .hero-facts{grid-template-columns:1fr;gap:8px;}
  .hero-panel img{height:200px;}
  .anchor-bar{padding:12px 14px;gap:8px;}
  .faq-q{font-size:16px;padding:18px 18px;}
  .faq-a p{padding:0 22px 20px 18px;font-size:15px;}
  .cta-panel{padding:34px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:36px;}
  .footer-grid .footer-col:last-child{grid-column:auto;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .to-top{right:14px;bottom:16px;}
}
@media (max-width:480px){
  body{font-size:15px;}
  .btn{width:100%;min-width:160px;}
  .hero-actions{flex-direction:column;}
  .m-card{padding:22px 18px;}
  .timeline-wrap{padding:24px 18px;}
  .doc-head{padding:18px 18px;}
  table.doc-table th,table.doc-table td{padding:12px 16px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category4 */
:root{
  --bg-0:#06171E;
  --bg-1:#0A212B;
  --bg-2:#0E2C38;
  --bg-glass:rgba(255,255,255,.06);
  --primary:#1FD8C2;
  --primary-deep:#0E8F86;
  --primary-soft:rgba(31,216,194,.14);
  --accent:#F0983C;
  --text:#E9F4F3;
  --text-2:#9DB5B8;
  --text-3:#6C878C;
  --text-invert:#05161C;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(31,216,194,.35);
  --ok:#3FD08A;
  --warn:#F0983C;
  --err:#E2604F;
  --r-sm:6px;
  --r-md:12px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-sm:0 1px 2px rgba(0,0,0,.30);
  --sh-md:0 12px 32px rgba(0,0,0,.35);
  --sh-glow:0 0 0 1px rgba(31,216,194,.35), 0 8px 24px rgba(31,216,194,.22);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border-style:none;}
a{color:var(--primary);text-decoration:none;transition:all .2s ease-out;}
p{margin:0 0 14px;line-height:1.9;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;color:var(--text);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;font-size:15px;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
  border-radius:var(--r-sm);
}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.section{padding:104px 0;position:relative;}
.section.alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{font-size:clamp(24px,3.2vw,36px);letter-spacing:-.01em;}
.section-head p{color:var(--text-2);font-size:16px;margin:14px 0 0;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;letter-spacing:.02em;
  color:var(--primary);
  background:var(--primary-soft);
  border:1px solid var(--line-strong);
  border-radius:var(--r-sm);
  padding:5px 12px;
  margin-bottom:16px;
}
.tag.accent{color:var(--accent);background:rgba(240,152,60,.12);border-color:rgba(240,152,60,.35);}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:200;
  background:rgba(6,23,30,.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
  transition:background .2s ease-out, box-shadow .2s ease-out;
}
.site-header.scrolled{background:rgba(6,23,30,.95);box-shadow:0 10px 30px rgba(0,0,0,.35);}
.nav-bar{display:flex;align-items:center;gap:18px;height:88px;transition:height .2s ease-out;}
.site-header.scrolled .nav-bar{height:68px;}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--text);}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:var(--r-md);
  color:var(--primary);
  background:var(--primary-soft);
  border:1px solid var(--line-strong);
  transition:all .2s ease-out;
}
.brand:hover .brand-mark{box-shadow:var(--sh-glow);}
.brand-text{font-size:18px;font-weight:800;letter-spacing:.01em;white-space:nowrap;}

.nav-search{flex:1 1 auto;max-width:440px;min-width:220px;}
.search-form{
  display:flex;align-items:center;
  height:46px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  padding:4px 4px 4px 14px;
  transition:all .2s ease-out;
}
.search-form:focus-within{
  border-color:var(--line-strong);
  box-shadow:0 0 0 3px rgba(31,216,194,.12);
  background:rgba(255,255,255,.07);
}
.search-icon{display:inline-flex;color:var(--text-3);flex:0 0 auto;}
.search-form input[type="search"]{
  flex:1 1 auto;min-width:0;
  height:100%;
  margin:0;padding:0 10px;
  background:transparent;border:0;box-shadow:none;
  color:var(--text);font-size:14.5px;
}
.search-form input[type="search"]::placeholder{color:var(--text-3);}
.search-form input[type="search"]:focus{outline:none;}
.search-btn{
  flex:0 0 auto;
  height:36px;padding:0 18px;
  border:0;border-radius:var(--r-pill);
  background:var(--primary);color:var(--text-invert);
  font-size:14px;font-weight:700;
  box-shadow:0 0 0 1px rgba(31,216,194,.35), 0 6px 18px rgba(31,216,194,.24);
  transition:all .2s ease-out;
}
.search-btn:hover{background:#3ee0cd;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(31,216,194,.45), 0 8px 22px rgba(31,216,194,.3);}
.search-btn:active{transform:translateY(1px);}

.main-nav{display:flex;align-items:center;gap:2px;flex:0 0 auto;}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  height:38px;padding:0 12px;
  border-radius:var(--r-sm);
  color:var(--text-2);font-size:14px;font-weight:500;
  white-space:nowrap;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.06);}
.nav-link.active{color:var(--primary);background:var(--primary-soft);}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;
  background:var(--primary);border-radius:2px;
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;
  border:1px solid transparent;border-radius:var(--r-md);
  font-size:14.5px;font-weight:700;line-height:1;
  text-align:center;white-space:nowrap;
  transition:all .2s ease-out;
}
.btn-primary{
  background:var(--primary);color:var(--text-invert);border-color:var(--primary);
  box-shadow:0 0 0 1px rgba(31,216,194,.35), 0 8px 24px rgba(31,216,194,.22);
}
.btn-primary:hover{
  background:#3ee0cd;border-color:#3ee0cd;color:var(--text-invert);
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(31,216,194,.5), 0 10px 28px rgba(31,216,194,.3);
}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--primary);}
.btn-ghost:hover{background:rgba(31,216,194,.12);color:var(--primary);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-block{width:100%;}
.nav-cta{flex:0 0 auto;height:42px;padding:0 18px;}

.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:4px;
  width:44px;height:44px;padding:0 10px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);border-radius:var(--r-md);
}
.nav-toggle span{display:block;height:2px;width:100%;background:var(--text);border-radius:2px;transition:all .2s ease-out;}
.nav-toggle.active span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.active span:nth-child(2){opacity:0;}
.nav-toggle.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

.hot-row{border-top:1px solid var(--line);max-height:44px;overflow:hidden;opacity:1;transition:max-height .2s ease-out, opacity .2s ease-out;}
.site-header.scrolled .hot-row{max-height:0;opacity:0;border-top-color:transparent;}
.hot-inner{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:8px 24px;}
.hot-label{font-size:13px;color:var(--text-3);flex:0 0 auto;}
.chip{
  display:inline-flex;align-items:center;
  height:28px;padding:0 12px;
  border:1px solid var(--line-strong);border-radius:var(--r-pill);
  color:var(--primary);font-size:13px;
  transition:all .2s ease-out;
}
.chip:hover{background:var(--primary-soft);color:var(--primary);}

.mobile-drawer{display:none;background:var(--bg-1);border-top:1px solid var(--line);padding:16px 0 22px;}
.mobile-drawer.open{display:block;}
.mobile-drawer .drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:16px;}
.mobile-drawer .nav-link{height:46px;padding:0 14px;font-size:15px;}
.mobile-drawer .nav-link.active::after{display:none;}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:52px 0 84px;background:var(--bg-0);border-bottom:1px solid var(--line);}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.30;
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,rgba(6,23,30,.80) 0%,rgba(6,23,30,.92) 60%,var(--bg-0) 100%);
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background-image:linear-gradient(rgba(31,216,194,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(31,216,194,.055) 1px,transparent 1px);
  background-size:72px 72px;
  opacity:.75;
}
.hero .container{position:relative;z-index:3;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-3);margin-bottom:26px;flex-wrap:wrap;}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-3);}
.breadcrumb .current{color:var(--primary);}

.hero-inner{display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center;}
.hero-copy h1{font-size:clamp(32px,5vw,52px);font-weight:800;line-height:1.2;letter-spacing:-.01em;margin-bottom:20px;}
.hero-copy h1 em{font-style:normal;color:var(--primary);}
.hero-sub{font-size:17px;line-height:1.85;color:var(--text-2);max-width:620px;margin-bottom:28px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:30px;}
.hero-points{display:flex;flex-direction:column;gap:12px;}
.hero-points li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--text-2);}
.hero-points li svg{flex:0 0 auto;margin-top:6px;color:var(--primary);}
.hero-points li strong{color:var(--text);font-weight:600;}

.hero-media{position:relative;}
.hero-media img{
  width:100%;border-radius:var(--r-lg);
  border:1px solid var(--line);
  box-shadow:var(--sh-md);
  object-fit:cover;
  aspect-ratio:4/3;
}
.hero-media-card{
  position:absolute;left:-18px;bottom:-22px;
  background:var(--bg-glass);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:14px 18px;
  box-shadow:var(--sh-md);
  max-width:230px;
}
.hero-media-card span{display:block;font-size:12.5px;color:var(--text-3);letter-spacing:.04em;}
.hero-media-card strong{display:block;font-size:15px;color:var(--text);font-weight:700;margin-top:4px;}

.anchor-bar{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  margin-top:44px;padding:14px 18px;
  background:var(--bg-glass);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
}
.anchor-bar span{font-size:13px;color:var(--text-3);margin-right:4px;}
.anchor-bar a{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  font-size:13.5px;color:var(--text-2);
}
.anchor-bar a:hover{border-color:var(--line-strong);color:var(--primary);background:var(--primary-soft);}

/* ============ 双栏要点对照 ============ */
.cmp-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;}
.cmp-col{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:30px 28px;
  transition:all .2s ease-out;
}
.cmp-col:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--sh-md);}
.cmp-col.highlight{
  border-color:var(--line-strong);
  background:linear-gradient(180deg,rgba(31,216,194,.10),rgba(14,44,56,.75));
  box-shadow:var(--sh-glow);
}
.cmp-col h3{font-size:21px;margin-bottom:8px;}
.cmp-col .cmp-note{font-size:13.5px;color:var(--text-3);margin-bottom:18px;}
.cmp-list li{
  display:flex;align-items:flex-start;gap:10px;
  padding:13px 0;
  font-size:15px;color:var(--text-2);
  border-bottom:1px dashed var(--line);
}
.cmp-list li:last-child{border-bottom:0;}
.cmp-list li svg{flex:0 0 auto;margin-top:5px;}
.cmp-list li.neg svg{color:var(--err);}
.cmp-list li.pos svg{color:var(--primary);}

/* ============ 对比表 ============ */
.table-wrap{
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:var(--bg-2);
  -webkit-overflow-scrolling:touch;
}
table.cmp-table{width:100%;min-width:820px;border-collapse:collapse;font-size:15px;}
table.cmp-table th,table.cmp-table td{
  padding:18px 20px;text-align:left;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
table.cmp-table thead th{
  background:rgba(31,216,194,.10);
  color:var(--primary);
  font-size:13.5px;font-weight:700;letter-spacing:.03em;
  border-bottom:1px solid var(--line-strong);
  white-space:nowrap;
}
table.cmp-table tbody tr:last-child td{border-bottom:0;}
table.cmp-table tbody tr{transition:background .2s ease-out;}
table.cmp-table tbody tr:hover{background:rgba(255,255,255,.03);}
table.cmp-table td:first-child{color:var(--text);font-weight:700;}
table.cmp-table td{color:var(--text-2);}
table.cmp-table .tier-tag{
  display:inline-block;font-size:12.5px;color:var(--accent);
  background:rgba(240,152,60,.12);
  border:1px solid rgba(240,152,60,.32);
  border-radius:var(--r-sm);
  padding:2px 8px;margin-bottom:8px;
}
.table-foot{font-size:13.5px;color:var(--text-3);margin-top:14px;}

/* ============ 引用 + 图 ============ */
.quote-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;}
.quote-block{
  background:rgba(31,216,194,.06);
  border-left:3px solid var(--primary);
  border-radius:0 var(--r-md) var(--r-md) 0;
  padding:26px 30px;
}
.quote-block p{font-size:19px;line-height:1.75;color:var(--text);margin:0 0 14px;}
.quote-block cite{font-style:normal;font-size:13.5px;color:var(--text-3);}
.quote-figure img{
  width:100%;border-radius:var(--r-lg);
  border:1px solid var(--line);
  box-shadow:var(--sh-md);
  object-fit:cover;aspect-ratio:16/11;
}

/* ============ 流程 ============ */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:22px;position:relative;margin-top:8px;}
.flow::before{
  content:"";position:absolute;left:19px;right:19px;top:19px;height:1px;
  background:linear-gradient(90deg,var(--line-strong),rgba(31,216,194,.12));
  z-index:0;
}
.flow-item{position:relative;z-index:1;padding-top:58px;}
.flow-num{
  position:absolute;top:0;left:0;
  width:38px;height:38px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg-1);
  border:1px solid var(--line-strong);
  color:var(--primary);font-size:15px;font-weight:700;
  box-shadow:0 0 0 6px var(--bg-0);
}
.section.alt .flow-num{box-shadow:0 0 0 6px var(--bg-1);}
.flow-item h3{font-size:17px;margin-bottom:8px;}
.flow-item p{font-size:14.5px;color:var(--text-2);margin:0;}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:.7fr 1.3fr;gap:48px;align-items:start;}
.faq-aside h2{font-size:clamp(24px,3.2vw,34px);margin-bottom:14px;}
.faq-aside p{color:var(--text-2);font-size:15.5px;margin-bottom:22px;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 0;
  background:none;border:0;text-align:left;
  color:var(--text);font-size:17.5px;font-weight:600;line-height:1.5;
  position:relative;
  transition:all .2s ease-out;
}
.faq-q:hover{color:var(--primary);}
.faq-icon{
  flex:0 0 auto;display:flex;align-items:center;justify-content:center;
  width:24px;height:24px;border-radius:50%;
  border:1px solid var(--line-strong);color:var(--primary);
  font-size:16px;line-height:1;
  transition:all .2s ease-out;
}
.faq-item.open .faq-q{color:var(--primary);}
.faq-item.open .faq-q::before{
  content:"";position:absolute;left:-18px;top:20px;bottom:20px;width:3px;
  background:var(--primary);border-radius:3px;
}
.faq-item.open .faq-icon{background:var(--primary);color:var(--text-invert);border-color:var(--primary);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease-out;}
.faq-a p{padding:0 40px 22px 0;font-size:15.5px;color:var(--text-2);margin:0;}

/* ============ CTA / 表单 ============ */
.cta-panel{
  display:grid;grid-template-columns:1.05fr .95fr;gap:44px;
  background:linear-gradient(120deg,rgba(31,216,194,.10),rgba(240,152,60,.07)),var(--bg-1);
  border:1px solid var(--line-strong);
  border-radius:var(--r-lg);
  padding:44px 44px 46px;
  position:relative;
  overflow:hidden;
}
.cta-panel::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(31,216,194,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(31,216,194,.045) 1px,transparent 1px);
  background-size:56px 56px;
}
.cta-copy{position:relative;z-index:1;}
.cta-copy h2{font-size:clamp(24px,3.2vw,34px);margin-bottom:16px;}
.cta-copy p{color:var(--text-2);font-size:15.5px;max-width:520px;}
.cta-list{margin:22px 0 26px;}
.cta-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--text-2);padding:6px 0;}
.cta-list li svg{flex:0 0 auto;margin-top:6px;color:var(--accent);}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

.form-card{
  position:relative;z-index:1;
  background:var(--bg-glass);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:28px 26px;
}
.form-card h3{font-size:19px;margin-bottom:6px;}
.form-card .form-sub{font-size:13.5px;color:var(--text-3);margin-bottom:20px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13.5px;color:var(--text-2);margin-bottom:7px;}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;
  background:rgba(6,23,30,.62);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  color:var(--text);
  margin:0;
  transition:all .2s ease-out;
  appearance:none;
  -webkit-appearance:none;
}
.field textarea{height:96px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field select{
  background-image:linear-gradient(45deg,transparent 50%,var(--text-2) 50%),linear-gradient(135deg,var(--text-2) 50%,transparent 50%);
  background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;
  background-size:6px 6px,6px 6px;
  background-repeat:no-repeat;
  padding-right:38px;
}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:var(--line-strong);
  box-shadow:0 0 0 3px rgba(31,216,194,.12);
  background:rgba(6,23,30,.82);
}
.form-tip{display:none;margin-top:14px;font-size:13.5px;color:var(--ok);}
.form-tip.show{display:block;}

/* ============ 页脚 ============ */
.site-footer{
  background:#04121A;
  border-top:1px solid var(--line);
  position:relative;
  padding:72px 0 0;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--primary),transparent);
  opacity:.6;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:52px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14.5px;color:var(--text-2);line-height:1.85;max-width:340px;margin:0;}
.footer-col h4{font-size:15px;color:var(--text);margin-bottom:16px;font-weight:700;}
.footer-col a{display:block;font-size:14.5px;color:var(--text-2);padding:6px 0;}
.footer-col a:hover{color:var(--primary);padding-left:4px;}
.footer-col ul li{font-size:14.5px;color:var(--text-2);padding:6px 0;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0 30px;
  border-top:1px solid var(--line);
  font-size:13.5px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--primary);}

/* ============ 回到顶部 ============ */
.back-top{
  position:fixed;right:26px;bottom:28px;z-index:150;
  width:46px;height:46px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(10,33,43,.9);
  border:1px solid var(--line-strong);
  border-radius:50%;
  color:var(--primary);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all .2s ease-out;
  backdrop-filter:blur(10px);
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{background:var(--primary-soft);box-shadow:var(--sh-glow);}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease-out,transform .55s ease-out;}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* ============ 响应式 ============ */
@media (max-width:1439px){
  .container{max-width:1180px;}
}
@media (max-width:1199px){
  .main-nav,.nav-cta{display:none;}
  .nav-toggle{display:flex;}
  .nav-bar{flex-wrap:wrap;height:auto;padding:14px 0 0;gap:14px;}
  .brand{order:1;}
  .nav-toggle{order:2;margin-left:auto;}
  .nav-search{order:3;flex:1 0 100%;max-width:none;min-width:0;margin-bottom:14px;}
  .site-header.scrolled .nav-bar{height:auto;padding:12px 0 0;}
  .hot-row{display:none;}
  .hero-inner{grid-template-columns:1.1fr .9fr;gap:34px;}
  .footer-grid{grid-template-columns:1.3fr 1fr 1fr;gap:32px;}
}
@media (max-width:991px){
  .section{padding:78px 0;}
  .hero{padding:42px 0 64px;}
  .hero-inner{grid-template-columns:1fr;gap:40px;}
  .hero-media{max-width:560px;}
  .hero-media-card{left:auto;right:14px;bottom:-18px;}
  .cmp-grid{grid-template-columns:1fr;}
  .quote-grid{grid-template-columns:1fr;gap:28px;}
  .flow{grid-template-columns:repeat(2,1fr);gap:26px 20px;}
  .flow::before{display:none;}
  .faq-wrap{grid-template-columns:1fr;gap:30px;}
  .cta-panel{grid-template-columns:1fr;padding:34px 28px 36px;gap:30px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:60px 0;}
  .hero{padding:32px 0 52px;}
  .hero-sub{font-size:15.5px;}
  .hero-cta .btn{flex:1 1 160px;}
  .anchor-bar{padding:12px 14px;}
  .cmp-col{padding:22px 20px;}
  .faq-q{font-size:16.5px;}
  .faq-a p{padding-right:0;font-size:15px;}
  .cta-panel{padding:28px 20px 30px;}
  .form-card{padding:22px 18px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding-bottom:40px;}
  .back-top{right:16px;bottom:18px;}

  .table-wrap{overflow:visible;border:0;background:transparent;border-radius:0;}
  table.cmp-table{min-width:0;width:100%;display:block;}
  table.cmp-table thead{display:none;}
  table.cmp-table tbody,table.cmp-table tr,table.cmp-table td{display:block;width:100%;}
  table.cmp-table tr{
    background:var(--bg-2);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    margin-bottom:16px;
    padding:10px 0;
  }
  table.cmp-table td{border-bottom:0;padding:9px 18px;font-size:14.5px;}
  table.cmp-table td::before{
    content:attr(data-label);
    display:block;
    font-size:12.5px;color:var(--text-3);
    margin-bottom:3px;letter-spacing:.02em;
  }
  table.cmp-table td:first-child{
    font-size:16px;
    padding-bottom:12px;
    border-bottom:1px solid var(--line);
    margin-bottom:6px;
  }
  table.cmp-table td:first-child::before{display:none;}
}
@media (max-width:480px){
  .hero-copy h1{font-size:clamp(28px,8vw,34px);}
  .hero-cta{flex-direction:column;gap:12px;}
  .hero-cta .btn{width:100%;}
  .cta-actions{flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .flow{grid-template-columns:1fr;}
  .brand-text{font-size:16.5px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}