/* roulang page: index */
/* ================= 设计令牌 ================= */
:root{
  --ink-900:#060A16;
  --ink-800:#0C1428;
  --ink-700:#121C36;
  --brand:#2F6BFF;
  --brand-deep:#1E4FD8;
  --brand-soft:#EAF0FF;
  --teal:#22D3EE;
  --accent:#FF8A3D;
  --accent-soft:#FFF1E6;
  --text:#0F172A;
  --text-2:#334155;
  --muted:#64748B;
  --line:#E2E8F0;
  --line-dark:rgba(148,190,255,.16);
  --soft:#F5F7FB;
  --card:#FFFFFF;
  --success:#34D399;
  --warn:#FBBF24;
  --danger:#F87171;
  --radius-s:12px;
  --radius:16px;
  --radius-l:20px;
  --pill:999px;
  --shadow-1:0 10px 30px rgba(15,23,42,.08);
  --shadow-2:0 18px 44px rgba(15,23,42,.12);
  --shadow-glow:0 8px 24px rgba(255,138,61,.35);
  --shadow-blue:0 0 40px rgba(47,107,255,.18);
  --container:1200px;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.2,.8,.2,1);
}

/* ================= 基础 reset ================= */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.8;color:var(--text-2);background:#fff;
  -webkit-font-smoothing:antialiased;
}
body.drawer-open{overflow:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;line-height:1.3;letter-spacing:.2px}
p{margin:0}
hr{border:0;border-top:1px solid var(--line);margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:8px}
::selection{background:rgba(47,107,255,.18)}

/* ================= 布局容器与板块 ================= */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 clamp(16px,4vw,32px)}
.section{padding:80px 0}
.section-tight{padding:56px 0}
.sec-soft{background:var(--soft)}
.sec-dark{background:var(--ink-900);color:#B8C4DE;position:relative;overflow:hidden}
.sec-dark h2,.sec-dark h3{color:#fff}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,3vw,34px)}
.section-head p{margin-top:10px;color:var(--muted);font-size:15px;max-width:640px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:1px;
  color:var(--brand);text-transform:uppercase;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--brand),var(--teal));border-radius:2px}
.sec-dark .eyebrow{color:var(--teal)}
.text-link{color:var(--brand);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:6px}
.text-link:hover{color:var(--brand-deep)}
.text-link::after{content:"→";transition:transform .2s var(--ease)}
.text-link:hover::after{transform:translateX(4px)}

/* ================= 按钮 ================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--pill);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .22s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn:active{transform:scale(.98)}
.btn-primary{
  background:linear-gradient(135deg,#FF9A55 0%,#FF8A3D 55%,#F2732A 100%);
  color:#231204;box-shadow:var(--shadow-glow);
}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 12px 32px rgba(255,138,61,.45)}
.btn-soft{background:var(--brand);color:#fff;box-shadow:0 8px 24px rgba(47,107,255,.28)}
.btn-soft:hover{background:var(--brand-deep)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.36);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.6)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--text)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-glass{background:rgba(255,255,255,.06);border-color:var(--line-dark);color:#E6EEFF;backdrop-filter:blur(12px)}
.btn-glass:hover{background:rgba(255,255,255,.12);border-color:rgba(148,190,255,.4)}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}

/* ================= 标签徽章 ================= */
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--pill);
  font-size:12px;font-weight:600;line-height:1.6;letter-spacing:.2px;
}
.badge-brand{background:var(--brand-soft);color:var(--brand-deep)}
.badge-teal{background:rgba(34,211,238,.14);color:#0E7490}
.badge-accent{background:var(--accent-soft);color:#B45309}
.badge-green{background:rgba(52,211,153,.16);color:#047857}
.badge-mono{font-family:var(--mono);letter-spacing:0}
.badge-ghost{background:rgba(255,255,255,.08);color:#CFDCF7;border:1px solid var(--line-dark)}

/* ================= 头部导航 ================= */
.site-header{
  position:sticky;top:0;z-index:60;width:100%;
  background:rgba(255,255,255,.94);
  border-bottom:1px solid rgba(15,23,42,.08);
  box-shadow:0 2px 12px rgba(15,23,42,.05);
  backdrop-filter:blur(10px);
  transition:box-shadow .25s var(--ease),background .25s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 10px 28px rgba(15,23,42,.1);background:rgba(255,255,255,.9)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,#2F6BFF,#22D3EE);box-shadow:0 6px 18px rgba(47,107,255,.32);
}
.brand-text{font-size:17px;font-weight:700;color:var(--text);letter-spacing:.2px}
.nav-center{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;padding:8px 14px;font-size:15px;font-weight:500;color:#475569;border-radius:10px;
}
.nav-link:hover{color:var(--brand);background:var(--brand-soft)}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px}
.search-box{
  display:flex;align-items:center;gap:8px;width:230px;height:40px;padding:0 14px;
  background:#F1F5F9;border:1px solid transparent;border-radius:var(--pill);
  transition:background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search-box:hover{border-color:#CBD5E1}
.search-box:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,107,255,.16)}
.search-box svg{flex:0 0 auto;color:#94A3B8}
.search-box input{width:100%;border:0;outline:none;background:transparent;font-size:14px;color:var(--text)}
.search-box input::placeholder{color:#94A3B8}
.menu-btn{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  align-items:center;justify-content:center;color:var(--text);background:#fff;
}
.menu-btn:hover{border-color:var(--brand);color:var(--brand)}

/* 移动端抽屉 */
.drawer{
  position:fixed;inset:0 0 0 auto;width:min(86vw,360px);z-index:90;
  background:#fff;box-shadow:-18px 0 48px rgba(15,23,42,.18);
  transform:translateX(102%);transition:transform .22s var(--ease),opacity .22s var(--ease);
  display:flex;flex-direction:column;padding:20px;opacity:0;
}
.drawer.is-open{transform:translateX(0);opacity:1}
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,10,22,.5);z-index:80;opacity:0;pointer-events:none;
  transition:opacity .22s var(--ease);
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{width:44px;height:44px;border-radius:12px;font-size:22px;color:var(--muted);border:1px solid var(--line)}
.drawer-nav{display:flex;flex-direction:column;gap:4px;padding:16px 0;flex:1}
.drawer-nav a{padding:12px 14px;border-radius:12px;font-size:16px;font-weight:500;color:#334155}
.drawer-nav a:hover{background:var(--brand-soft);color:var(--brand)}
.drawer-nav a.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600}

/* ================= Hero ================= */
.hero{
  position:relative;overflow:hidden;color:#C7D3EC;
  background-color:var(--ink-900);
  background-image:linear-gradient(120deg,rgba(6,10,22,.96) 0%,rgba(9,17,38,.92) 48%,rgba(12,20,40,.86) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:64px 64px;
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:84px 0 72px}
.hero h1{font-size:clamp(30px,4.4vw,50px);line-height:1.16;color:#fff;letter-spacing:.4px}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.85;color:#B6C5E2;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.chip{
  display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:var(--pill);
  background:rgba(255,255,255,.055);border:1px solid var(--line-dark);backdrop-filter:blur(14px);
  font-size:13px;color:#D3DEF6;box-shadow:inset 0 1px 0 rgba(255,255,255,.1);
}
.chip b{font-family:var(--mono);font-weight:600;color:#fff}
.chip-dot{width:5px;height:5px;border-radius:50%;background:var(--teal);box-shadow:0 0 8px var(--teal)}
.hero-visual{position:relative;min-height:340px}
.hero-visual-bg{
  position:absolute;inset:-6% -4%;border-radius:26px;background-size:cover;background-position:center;
  opacity:.42;filter:saturate(1.1);
  -webkit-mask-image:linear-gradient(160deg,#000 40%,transparent 100%);
  mask-image:linear-gradient(160deg,#000 40%,transparent 100%);
}
.hero-visual-card{
  position:relative;z-index:3;border-radius:var(--radius-l);overflow:hidden;
  border:1px solid var(--line-dark);background:rgba(255,255,255,.06);backdrop-filter:blur(14px);
  box-shadow:var(--shadow-blue),inset 0 1px 0 rgba(255,255,255,.1);
  transform:perspective(1100px) rotateY(-7deg) rotateX(2deg);
  transition:transform .35s var(--ease);
}
.hero-visual-card:hover{transform:perspective(1100px) rotateY(-3deg) rotateX(0deg) translateY(-4px)}
.hero-visual-card img{border-radius:var(--radius-l)}
.hero-visual-tag{
  position:absolute;left:16px;bottom:16px;padding:6px 14px;border-radius:var(--pill);
  background:rgba(6,10,22,.72);border:1px solid var(--line-dark);color:#DCE6FA;font-size:13px;backdrop-filter:blur(10px);
}

/* ================= 信任条 ================= */
.trust-bar{background:var(--ink-800);border-top:1px solid rgba(148,190,255,.12)}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.trust-item{padding:24px 18px;border-right:1px solid rgba(148,190,255,.12)}
.trust-item:last-child{border-right:0}
.trust-item h3{font-size:15px;color:#fff;font-weight:600;display:flex;align-items:center;gap:8px}
.trust-item p{font-size:13px;color:#8B9AC0;margin-top:6px;line-height:1.7}
.trust-item .mono{font-family:var(--mono);color:var(--teal);font-size:12px}

/* ================= 截图轮播 ================= */
.shots{position:relative}
.shot-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 4px 22px;scrollbar-width:none;-ms-overflow-style:none;
}
.shot-track::-webkit-scrollbar{display:none}
.shot{
  flex:0 0 78%;scroll-snap-align:center;position:relative;border-radius:var(--radius-l);overflow:hidden;
  border:1px solid var(--line-dark);background:rgba(255,255,255,.055);backdrop-filter:blur(14px);
  box-shadow:0 0 40px rgba(47,107,255,.14),inset 0 1px 0 rgba(255,255,255,.1);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.shot:hover{transform:translateY(-4px);box-shadow:0 0 48px rgba(47,107,255,.26),inset 0 1px 0 rgba(255,255,255,.14)}
.shot img{width:100%;aspect-ratio:16/10;object-fit:cover}
.shot-cap{
  position:absolute;left:16px;right:16px;bottom:14px;padding:12px 16px;border-radius:14px;
  background:rgba(6,10,22,.74);border:1px solid var(--line-dark);backdrop-filter:blur(10px);
}
.shot-cap h3{font-size:15px;color:#fff}
.shot-cap p{font-size:12.5px;color:#9FB0D4;margin-top:4px}
.shot-nav{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:6px}
.shot-dots{display:flex;gap:8px;flex:1}
.shot-dots button{width:30px;height:4px;border-radius:2px;background:rgba(255,255,255,.18);transition:background .2s var(--ease),box-shadow .2s var(--ease)}
.shot-dots button.is-active{background:var(--brand);box-shadow:0 0 10px rgba(47,107,255,.9)}
.shot-arrows{display:flex;gap:10px}
.arrow-btn{
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;color:#D6E1F8;
  background:rgba(255,255,255,.06);border:1px solid var(--line-dark);backdrop-filter:blur(12px);
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.arrow-btn:hover{background:rgba(255,255,255,.14);transform:translateY(-2px)}

/* ================= 核心能力（sticky 编号卡） ================= */
.ability-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;align-items:start}
.ability-sticky{position:sticky;top:104px}
.ability-sticky h2{font-size:clamp(24px,3vw,34px)}
.ability-sticky p{margin-top:16px;color:var(--muted);font-size:15.5px}
.ability-note{
  margin-top:24px;padding:18px;border-radius:var(--radius);background:var(--brand-soft);
  border:1px solid #D8E3FF;font-size:14px;color:#25406F;
}
.ability-list{display:flex;flex-direction:column;gap:18px}
.ability-card{
  display:grid;grid-template-columns:72px 1fr;gap:20px;padding:26px;border-radius:var(--radius-l);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.ability-card:hover{transform:translateY(-4px);border-color:#C9D8FF;box-shadow:var(--shadow-2)}
.ability-num{
  font-family:var(--mono);font-size:20px;font-weight:700;color:var(--brand);
  width:56px;height:56px;border-radius:16px;display:grid;place-items:center;
  background:var(--brand-soft);border:1px solid #D8E3FF;
}
.ability-card h3{font-size:18px;margin-bottom:8px}
.ability-card p{font-size:15px;color:var(--muted)}
.ability-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

/* ================= 系统要求 ================= */
.spec-table{border:1px solid var(--line);border-radius:var(--radius-l);background:#fff;overflow:hidden;box-shadow:var(--shadow-1)}
.spec-row{
  display:grid;grid-template-columns:1.1fr 1.4fr 1.2fr .8fr;gap:16px;align-items:center;
  padding:20px 24px;border-bottom:1px solid var(--line);transition:background .2s var(--ease);
}
.spec-row:last-child{border-bottom:0}
.spec-row:hover{background:#F2F6FF}
.spec-head{background:#EEF3FF;font-size:13px;font-weight:600;color:#4A5B7C;letter-spacing:.4px}
.spec-row strong{font-size:15px;color:var(--text);display:flex;align-items:center;gap:10px}
.spec-mono{font-family:var(--mono);font-size:13.5px;color:#41506B}
.spec-table-note{margin-top:16px;font-size:13.5px;color:var(--muted)}

/* ================= 评价墙 ================= */
.voice-wall{column-count:1;column-gap:20px}
.voice-card{
  break-inside:avoid;margin-bottom:20px;padding:24px;border-radius:var(--radius);background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.voice-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.voice-top{display:flex;align-items:center;gap:12px}
.avatar{
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;flex:0 0 auto;
  background:linear-gradient(135deg,#E4ECFF,#D6F5FB);color:var(--brand-deep);font-weight:700;font-size:15px;
}
.voice-name{font-size:15px;font-weight:600;color:var(--text)}
.voice-meta{font-size:12.5px;color:var(--muted)}
.stars{display:flex;gap:2px;margin:14px 0 10px;color:var(--accent)}
.voice-card p{font-size:14.5px;color:#475569}

/* ================= 下载回收区 ================= */
.download-panel{
  display:grid;grid-template-columns:1.35fr .65fr;gap:36px;align-items:center;
  padding:40px;border-radius:24px;border:1px solid var(--line-dark);
  background:rgba(255,255,255,.055);backdrop-filter:blur(14px);
  box-shadow:0 0 40px rgba(47,107,255,.18),inset 0 1px 0 rgba(255,255,255,.1);
}
.download-panel h2{font-size:clamp(22px,2.6vw,30px);color:#fff}
.download-panel p{margin-top:12px;color:#9FB0D4;font-size:15px}
.platform-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.file-meta{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:22px;font-size:13px;color:#93A4C9;font-family:var(--mono)}
.qr-box{
  border:1px dashed rgba(148,190,255,.4);border-radius:var(--radius-l);padding:20px;text-align:center;
  background:rgba(255,255,255,.03);
}
.qr-box span.qr-square{
  display:block;width:112px;height:112px;margin:0 auto 14px;border-radius:14px;
  border:1px solid rgba(148,190,255,.34);
  background-image:linear-gradient(90deg,rgba(190,215,255,.35) 1px,transparent 1px),linear-gradient(rgba(190,215,255,.35) 1px,transparent 1px);
  background-size:14px 14px;
}
.qr-box p{font-size:13px;color:#93A4C9;margin:0}

/* ================= 最新信息（CMS 区） ================= */
.cms-layout{display:grid;grid-template-columns:1.15fr 1fr;gap:26px;align-items:start}
.cms-main{
  border-radius:var(--radius-l);overflow:hidden;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.cms-main:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.cms-main-cover{display:block;position:relative;overflow:hidden}
.cms-main-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s var(--ease)}
.cms-main:hover .cms-main-cover img{transform:scale(1.04)}
.cms-main-body{padding:24px}
.cms-main-body h3{font-size:20px;margin:14px 0 10px;line-height:1.5}
.cms-main-body h3 a:hover{color:var(--brand)}
.cms-main-body p{font-size:14.5px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.cms-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;font-size:12.5px;color:var(--muted);margin-top:16px}
.cms-side-list{display:flex;flex-direction:column;gap:16px}
.cms-mini{
  display:grid;grid-template-columns:104px 1fr;gap:16px;align-items:center;
  padding:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:0 6px 18px rgba(15,23,42,.05);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.cms-mini:hover{transform:translateY(-3px);border-color:#C9D8FF;box-shadow:var(--shadow-1)}
.cms-mini img{width:104px;height:72px;object-fit:cover;border-radius:12px}
.cms-mini h4{font-size:15.5px;line-height:1.5;margin:8px 0 6px}
.cms-mini h4 a:hover{color:var(--brand)}
.cms-mini p{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cms-empty{
  border:1px dashed var(--line);border-radius:var(--radius-l);background:#fff;
  padding:56px 24px;text-align:center;
}
.cms-empty svg{margin:0 auto 16px;color:#93A4C9}
.cms-empty p{font-size:15px;color:var(--muted);margin-bottom:20px}

/* ================= FAQ ================= */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.faq-item.is-open{border-color:#C9D8FF;box-shadow:var(--shadow-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;text-align:left;font-size:16px;font-weight:600;color:var(--text);
}
.faq-q:hover{color:var(--brand)}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);font-size:16px;line-height:1;
  transition:transform .24s var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a-inner{padding:0 24px 22px;font-size:15px;color:#475569}

/* ================= 页脚 CTA 带 ================= */
.cta-band{
  background:linear-gradient(120deg,#0A1226 0%,#12224A 60%,#0A1226 100%);
  border-top:1px solid rgba(148,190,255,.14);
}
.cta-band-inner{display:flex;align-items:center;justify-content:space-between;gap:26px;padding:44px 0;flex-wrap:wrap}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);color:#fff}
.cta-band p{color:#9FB0D4;font-size:14.5px;margin-top:8px}

/* ================= 页脚 ================= */
.site-footer{background:#060A16;color:#8291B4;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:38px;padding-bottom:44px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-text{color:#fff}
.footer-about{font-size:14px;line-height:1.9;color:#8291B4;max-width:320px}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social span{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  border:1px solid rgba(148,190,255,.18);color:#A9B8DA;font-size:13px;
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.footer-social span:hover{border-color:var(--brand);color:#fff;background:rgba(47,107,255,.18)}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:18px;font-weight:600}
.footer-col li{margin-bottom:12px}
.footer-col a{font-size:14px;color:#8291B4}
.footer-col a:hover{color:#fff}
.footer-col .mono{font-family:var(--mono);font-size:13.5px;color:#9DB0DA}
.footer-bottom{
  border-top:1px solid rgba(148,190,255,.14);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#64748B;
}
.footer-bottom a:hover{color:#A9B8DA}

/* ================= 响应式 ================= */
@media (max-width:1199px){
  .hero-inner{gap:40px}
  .ability-layout{gap:38px}
}
@media (max-width:1023px){
  .nav-center,.search-box{display:none}
  .menu-btn{display:inline-flex}
  .header-inner{height:60px}
  .section{padding:64px 0}
  .hero-inner{grid-template-columns:1fr;padding:64px 0 56px}
  .hero-visual{min-height:0;margin-top:8px}
  .hero-visual-card{transform:none}
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .trust-item:nth-child(2){border-right:0}
  .trust-item:nth-child(1),.trust-item:nth-child(2){border-bottom:1px solid rgba(148,190,255,.12)}
  .ability-layout{grid-template-columns:1fr}
  .ability-sticky{position:static}
  .cms-layout{grid-template-columns:1fr}
  .download-panel{grid-template-columns:1fr;padding:32px}
  .spec-row{grid-template-columns:1fr 1fr;gap:8px 16px;padding:18px 20px}
  .spec-head{display:none}
  .spec-row > *:nth-child(1){grid-column:1 / -1}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (min-width:640px){
  .shot{flex-basis:52%}
  .voice-wall{column-count:2}
}
@media (min-width:1024px){
  .shot{flex-basis:36%}
  .voice-wall{column-count:3}
}
@media (max-width:639px){
  .section{padding:48px 0}
  .header-inner{gap:10px}
  .btn{min-height:48px;padding:0 20px}
  .hero-actions .btn{width:100%}
  .trust-grid{grid-template-columns:1fr}
  .trust-item{border-right:0;border-bottom:1px solid rgba(148,190,255,.12)}
  .trust-item:last-child{border-bottom:0}
  .shot{flex-basis:84%}
  .ability-card{grid-template-columns:1fr;gap:14px}
  .cms-mini{grid-template-columns:88px 1fr}
  .cms-mini img{width:88px;height:66px}
  .voice-wall{column-count:1}
  .cta-band-inner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
}

/* roulang page: article */
:root{
    --ink-900:#060A16;
    --ink-800:#0C1428;
    --ink-700:#121C36;
    --blue:#2F6BFF;
    --cyan:#22D3EE;
    --amber:#FF8A3D;
    --light:#F5F7FB;
    --card:#FFFFFF;
    --text:#334155;
    --title:#0F172A;
    --muted:#64748B;
    --line:#E2E8F0;
    --success:#34D399;
    --warn:#FBBF24;
    --danger:#F87171;
    --glass-line:rgba(148,190,255,.16);
    --r-card:16px;
    --r-lg:20px;
    --shadow-card:0 10px 30px rgba(15,23,42,.08);
    --shadow-cta:0 8px 24px rgba(255,138,61,.35);
    --ease:cubic-bezier(.2,.8,.2,1);
    --maxw:1200px;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  html body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",Inter,system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.8;
    color:var(--text);
    background:#FFFFFF;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  input{font:inherit}
  ul,ol{list-style:none;margin:0;padding:0}
  h1,h2,h3,h4{margin:0;color:var(--title);font-weight:700;line-height:1.25}
  p{margin:0}
  .mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace}
  .container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 clamp(16px,4vw,32px)}
  :focus-visible{outline:2px solid var(--blue);outline-offset:2px}

  /* ---------- header ---------- */
  .site-header{position:sticky;top:0;z-index:60;background:#FFFFFF;border-bottom:1px solid rgba(15,23,42,.08);box-shadow:0 2px 12px rgba(15,23,42,.05);transition:box-shadow .25s var(--ease),background .25s var(--ease)}
  .site-header.is-scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(12px);box-shadow:0 6px 24px rgba(15,23,42,.10)}
  .header-inner{display:flex;align-items:center;gap:20px;height:68px}
  .brand{display:inline-flex;align-items:center;gap:10px;flex:none}
  .brand-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:0 6px 16px rgba(47,107,255,.28)}
  .brand-text{font-size:17px;font-weight:700;color:var(--title);letter-spacing:.2px;white-space:nowrap}
  .nav-center{display:flex;align-items:center;gap:2px;margin-left:6px}
  .nav-link{position:relative;display:inline-flex;align-items:center;height:68px;padding:0 12px;font-size:15px;font-weight:500;color:#475569;transition:color .2s var(--ease)}
  .nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;border-radius:2px;background:var(--blue);transform:scaleX(0);transform-origin:center;transition:transform .22s var(--ease)}
  .nav-link:hover{color:var(--blue)}
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link.is-active{color:var(--blue);font-weight:600}
  .nav-link.is-active::after{transform:scaleX(1)}
  .header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
  .search-box{display:flex;align-items:center;gap:8px;width:224px;height:40px;padding:0 14px;border-radius:999px;background:#F1F5F9;border:2px solid transparent;transition:background .2s var(--ease),border-color .2s var(--ease)}
  .search-box svg{flex:none;color:#64748B}
  .search-box input{width:100%;border:0;background:transparent;outline:none;font-size:14px;color:#0F172A}
  .search-box input::placeholder{color:#94A3B8}
  .search-box:hover{background:#E8EEF7}
  .search-box:focus-within{background:#FFFFFF;border-color:var(--blue)}
  .nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);align-items:center;justify-content:center;color:#0F172A;transition:border-color .2s var(--ease),color .2s var(--ease)}
  .nav-toggle:hover{border-color:var(--blue);color:var(--blue)}

  .drawer{position:fixed;left:0;right:0;top:60px;bottom:0;z-index:55;background:#FFFFFF;padding:18px 20px 120px;overflow-y:auto;opacity:0;transform:translateY(-14px);pointer-events:none;transition:opacity .22s var(--ease),transform .22s var(--ease)}
  .drawer.is-open{opacity:1;transform:none;pointer-events:auto}
  .drawer a.drawer-link{display:flex;align-items:center;justify-content:space-between;height:52px;padding:0 4px;font-size:16px;font-weight:500;color:#334155;border-bottom:1px solid var(--line)}
  .drawer a.drawer-link.is-active{color:var(--blue);font-weight:600}
  .drawer .drawer-search{display:flex;align-items:center;gap:8px;height:46px;padding:0 16px;border-radius:12px;background:#F1F5F9;margin-bottom:18px;border:2px solid transparent}
  .drawer .drawer-search:focus-within{background:#fff;border-color:var(--blue)}
  .drawer .drawer-search input{width:100%;border:0;background:transparent;outline:none;font-size:15px}
  .drawer .drawer-cta{position:fixed;left:0;right:0;bottom:0;padding:12px 20px calc(12px + env(safe-area-inset-bottom));background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-top:1px solid var(--line)}

  /* ---------- buttons ---------- */
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:999px;font-size:15px;font-weight:600;white-space:nowrap;transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease)}
  .btn-primary{background:linear-gradient(135deg,#FF9A55,var(--amber));color:#fff;box-shadow:var(--shadow-cta)}
  .btn-primary:hover{filter:brightness(1.07);transform:translateY(-1px);box-shadow:0 12px 30px rgba(255,138,61,.46)}
  .btn-primary:active{transform:scale(.98)}
  .btn-blue{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;box-shadow:0 8px 24px rgba(47,107,255,.30)}
  .btn-blue:hover{filter:brightness(1.07);transform:translateY(-1px)}
  .btn-outline{border:1px solid var(--line);background:#fff;color:#334155}
  .btn-outline:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-1px)}
  .btn-ghost{border:1px solid rgba(148,190,255,.35);background:rgba(255,255,255,.06);color:#E2E8F0}
  .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:rgba(148,190,255,.6)}
  .btn-sm{height:40px;padding:0 18px;font-size:14px}
  .btn-block{width:100%}

  /* ---------- article hero ---------- */
  .article-hero{position:relative;background:var(--ink-900);padding:40px 0 52px;overflow:hidden}
  .article-hero .hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;opacity:.30}
  .article-hero .hero-mask{position:absolute;inset:0;background:linear-gradient(112deg,rgba(6,10,22,.96) 0%,rgba(6,10,22,.80) 46%,rgba(12,20,40,.66) 100%)}
  .article-hero .hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(148,190,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(148,190,255,.07) 1px,transparent 1px);background-size:64px 64px}
  .article-hero .container{position:relative;z-index:2}
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:#64748B;margin-bottom:22px;flex-wrap:wrap}
  .breadcrumb a{color:#94A3B8;transition:color .2s var(--ease)}
  .breadcrumb a:hover{color:#fff}
  .breadcrumb i{font-style:normal;color:#475569}
  .breadcrumb .crumb-current{color:#CBD5E1;max-width:min(520px,60vw);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .tag-pill{display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:999px;background:rgba(47,107,255,.16);border:1px solid rgba(148,190,255,.28);color:#9DC0FF;font-size:13px;font-weight:600;letter-spacing:.02em}
  .article-title{font-size:clamp(26px,3.4vw,42px);line-height:1.22;color:#FFFFFF;margin:16px 0 18px;font-weight:700;max-width:22em}
  .article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px 20px;padding-top:18px;border-top:1px solid rgba(148,190,255,.16);font-size:14px;color:#94A3B8}
  .article-meta .meta-item{display:inline-flex;align-items:center;gap:7px}
  .article-meta .dot{width:4px;height:4px;border-radius:50%;background:#475569}

  /* ---------- article body ---------- */
  .article-main{padding:56px 0 20px;background:#FFFFFF}
  .article-layout{display:grid;grid-template-columns:minmax(0,1fr) 262px;gap:52px;align-items:start}
  .article-body{max-width:760px;font-size:16px;line-height:1.9;color:var(--text)}
  .article-body>*:first-child{margin-top:0}
  .article-body h2{position:relative;font-size:clamp(21px,2.3vw,26px);line-height:1.35;margin:44px 0 16px;padding-left:16px}
  .article-body h2::before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;border-radius:3px;background:linear-gradient(180deg,var(--blue),var(--cyan))}
  .article-body h3{font-size:19px;margin:30px 0 12px;color:#1E293B}
  .article-body h4{font-size:17px;margin:24px 0 10px;color:#1E293B}
  .article-body p{margin:0 0 1.25em}
  .article-body img{border-radius:16px;margin:26px 0;box-shadow:var(--shadow-card)}
  .article-body figure{margin:26px 0}
  .article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
  .article-body blockquote{margin:26px 0;padding:16px 22px;background:#EFF5FF;border-left:3px solid var(--blue);border-radius:0 12px 12px 0;color:#334155}
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body ul{list-style:disc;padding-left:1.4em;margin:0 0 1.3em}
  .article-body ol{list-style:decimal;padding-left:1.5em;margin:0 0 1.3em}
  .article-body li{margin-bottom:.55em;line-height:1.85}
  .article-body a{color:var(--blue);text-decoration:underline;text-underline-offset:3px;transition:color .2s var(--ease)}
  .article-body a:hover{color:#1D4ED8}
  .article-body strong{color:#0F172A}
  .article-body code{padding:2px 6px;border-radius:6px;background:#F1F5F9;color:#1D4ED8;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em}
  .article-body pre{margin:24px 0;padding:18px;border-radius:14px;background:#0C1428;color:#E2E8F0;overflow-x:auto;font-size:14px;line-height:1.7}
  .article-body pre code{background:none;color:inherit;padding:0}
  .article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;border:1px solid var(--line);border-radius:14px;overflow:hidden}
  .article-body th{background:#F1F5F9;color:var(--title);font-weight:600;text-align:left}
  .article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line)}
  .article-body tbody tr:nth-child(even){background:#FAFBFE}
  .article-body tbody tr:last-child td{border-bottom:0}
  .article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}

  .toc{position:sticky;top:96px;padding:18px;border:1px solid var(--line);border-radius:var(--r-card);background:#F8FAFF}
  .toc h2{font-size:13px;letter-spacing:.12em;color:var(--muted);font-weight:600;margin-bottom:10px;text-transform:uppercase}
  .toc ul{display:flex;flex-direction:column;gap:2px;max-height:60vh;overflow-y:auto}
  .toc a{display:block;font-size:14px;line-height:1.55;color:#475569;padding:7px 10px;border-radius:8px;border-left:2px solid transparent;transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease)}
  .toc a:hover{color:var(--blue);background:#fff}
  .toc a.is-current{color:var(--blue);font-weight:600;background:#fff;border-left-color:var(--blue)}
  .toc a.is-sub{padding-left:24px;font-size:13px;color:#64748B}
  .toc-empty{font-size:13px;color:var(--muted);line-height:1.7}

  .article-foot{margin-top:44px;padding-top:26px;border-top:1px solid var(--line)}
  .tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:26px}
  .tag-row .label{font-size:13px;color:var(--muted)}
  .tag{display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:999px;background:#F1F5F9;color:#475569;font-size:13px;transition:background .2s var(--ease),color .2s var(--ease)}
  .tag:hover{background:#E6EEFB;color:var(--blue)}
  .pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:24px}
  .pn-card{display:block;padding:18px;border:1px solid var(--line);border-radius:var(--r-card);background:#fff;transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease)}
  .pn-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card);border-color:rgba(47,107,255,.32)}
  .pn-card .pn-label{font-size:13px;color:var(--muted);margin-bottom:8px}
  .pn-card .pn-title{font-size:15px;font-weight:600;color:var(--title);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .pn-card.is-empty .pn-title{color:#94A3B8;font-weight:500}

  .article-empty{max-width:760px;padding:56px 32px;border:1px dashed var(--line);border-radius:var(--r-lg);background:#FAFBFE;text-align:center}
  .article-empty h2{font-size:22px;margin-bottom:10px}
  .article-empty p{color:var(--muted);margin-bottom:22px}

  /* ---------- related ---------- */
  .related{padding:56px 0 68px;background:var(--light)}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;flex-wrap:wrap}
  .section-head h2{font-size:clamp(22px,2.6vw,30px)}
  .section-head p{font-size:15px;color:var(--muted);margin-top:8px}
  .related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
  .rel-card{display:flex;flex-direction:column;background:#fff;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card);transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
  .rel-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(15,23,42,.14)}
  .rel-card .thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:#E2E8F0}
  .rel-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
  .rel-card:hover .thumb img{transform:scale(1.05)}
  .rel-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
  .rel-card .chip{align-self:flex-start;font-size:12px;font-weight:600;color:var(--blue);background:rgba(47,107,255,.10);padding:4px 10px;border-radius:999px}
  .rel-card h3{font-size:17px;line-height:1.5}
  .rel-card p{font-size:14px;color:var(--muted);line-height:1.7;flex:1}
  .rel-card .time{font-size:13px;color:#94A3B8}

  /* ---------- cta band ---------- */
  .cta-band{background:var(--ink-900);padding:52px 0;position:relative;overflow:hidden}
  .cta-band::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 240px at 82% 20%,rgba(47,107,255,.34),transparent 70%)}
  .cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
  .cta-inner h2{color:#fff;font-size:clamp(20px,2.4vw,27px)}
  .cta-inner p{color:#94A3B8;font-size:15px;margin-top:8px;max-width:56ch}

  /* ---------- footer ---------- */
  .site-footer{background:var(--ink-900);color:#94A3B8;padding:60px 0 26px;font-size:14px}
  .footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:40px}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
  .footer-brand .brand-text{color:#fff;font-size:16px}
  .footer-about{line-height:1.85;color:#94A3B8;max-width:36em}
  .footer-social{display:flex;gap:10px;margin-top:18px}
  .footer-social span{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;border:1px solid var(--glass-line);background:rgba(255,255,255,.04);color:#CBD5E1;font-size:13px}
  .footer-col h3{color:#fff;font-size:15px;margin-bottom:14px}
  .footer-col li{margin-bottom:10px;line-height:1.7}
  .footer-col a{color:#94A3B8;transition:color .2s var(--ease)}
  .footer-col a:hover{color:#fff}
  .footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:42px;padding-top:22px;border-top:1px solid var(--glass-line);font-size:13px;color:#64748B}

  /* ---------- responsive ---------- */
  @media (max-width:1279px){
    .article-layout{grid-template-columns:1fr;gap:0}
    .toc{display:none}
    .article-body{max-width:820px}
  }
  @media (max-width:1023px){
    .nav-center,.search-box{display:none}
    .nav-toggle{display:inline-flex}
    .header-inner{height:60px}
    .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  }
  @media (max-width:767px){
    .article-hero{padding:28px 0 38px}
    .article-main{padding:36px 0 12px}
    .article-body{font-size:16px}
    .article-body h2{margin-top:34px}
    .pn-grid{grid-template-columns:1fr}
    .related{padding:44px 0 52px}
    .related-grid{grid-template-columns:1fr}
    .cta-band{padding:40px 0}
    .site-footer{padding:48px 0 22px}
    .footer-grid{grid-template-columns:1fr;gap:28px}
    .footer-bottom{flex-direction:column}
    .article-meta{gap:8px 16px}
  }
  @media (max-width:520px){
    .brand-text{font-size:15px}
    .article-title{font-size:24px}
    .article-empty{padding:40px 20px}
  }
  @media (hover:none){
    .rel-card:hover,.pn-card:hover{transform:none}
  }

/* roulang page: category1 */
:root{
  --ink-900:#060A16;
  --ink-800:#0C1428;
  --ink-700:#121C36;
  --brand:#2F6BFF;
  --brand-soft:#EAF0FF;
  --cyan:#22D3EE;
  --amber:#FF8A3D;
  --light-bg:#F5F7FB;
  --card:#FFFFFF;
  --text:#0F172A;
  --text-2:#334155;
  --muted:#64748B;
  --line:#E2E8F0;
  --success:#34D399;
  --warning:#FBBF24;
  --danger:#F87171;
  --radius-card:18px;
  --radius-lg:20px;
  --radius-input:12px;
  --radius-pill:999px;
  --shadow-card:0 10px 30px rgba(15,23,42,.08);
  --shadow-soft:0 4px 16px rgba(15,23,42,.06);
  --shadow-cta:0 8px 24px rgba(255,138,61,.35);
  --shadow-brand:0 8px 24px rgba(47,107,255,.30);
  --ease:cubic-bezier(.2,.8,.2,1);
  --container:1200px;
  --font-body:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.85;
  color:var(--text-2);
  background:#FFFFFF;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.mono{font-family:var(--font-mono);letter-spacing:.02em}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 clamp(16px,4vw,32px)}
.section{padding:clamp(48px,7vw,80px) 0}
.section-light{background:var(--light-bg)}
.section-dark{background:var(--ink-900);color:#E2E8F0}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#FFFFFF;
  border-bottom:1px solid rgba(15,23,42,.08);
  box-shadow:0 2px 12px rgba(15,23,42,.05);
  transition:box-shadow .25s var(--ease),background .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:0 6px 24px rgba(15,23,42,.10);
}
.header-inner{display:flex;align-items:center;gap:18px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand),var(--cyan));
  box-shadow:0 6px 16px rgba(47,107,255,.32);
}
.brand-text{font-size:17px;font-weight:700;color:var(--text);letter-spacing:-.01em;white-space:nowrap}
.nav-center{display:flex;align-items:center;gap:2px;margin:0 auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;min-height:44px;
  padding:10px 14px;font-size:15px;font-weight:500;color:#475569;border-radius:10px;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--cyan));
  opacity:0;transform:scaleX(.35);transition:opacity .22s var(--ease),transform .22s var(--ease);
}
.nav-link:hover{color:var(--brand);background:rgba(47,107,255,.06)}
.nav-link:hover::after{opacity:1;transform:scaleX(1)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{opacity:1;transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.search-box{
  display:flex;align-items:center;gap:8px;height:40px;width:220px;padding:0 14px;
  background:#F1F5F9;border:1px solid transparent;border-radius:var(--radius-pill);
  transition:background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search-box:hover{background:#E9EEF7}
.search-box:focus-within{background:#FFFFFF;border-color:var(--brand);box-shadow:0 0 0 2px rgba(47,107,255,.25)}
.search-box svg{flex:0 0 auto;stroke:#94A3B8}
.search-box input{
  width:100%;border:0;background:transparent;outline:none;font-size:14px;color:var(--text);
}
.search-box input::placeholder{color:#94A3B8}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn:active{transform:scale(.98)}
.btn-primary{
  color:#fff;background:linear-gradient(135deg,#2F6BFF,#5B8CFF);
  box-shadow:var(--shadow-brand);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 12px 30px rgba(47,107,255,.42)}
.btn-cta{
  color:#fff;background:linear-gradient(135deg,#FF8A3D,#FFB067);
  box-shadow:var(--shadow-cta);
}
.btn-cta:hover{filter:brightness(1.06);box-shadow:0 12px 32px rgba(255,138,61,.46)}
.btn-ghost{
  color:#E2E8F0;border:1px solid rgba(148,190,255,.35);background:rgba(255,255,255,.04);
}
.btn-ghost:hover{background:rgba(255,255,255,.10);border-color:rgba(148,190,255,.6);color:#fff}
.btn-outline{
  color:var(--brand);border:1px solid rgba(47,107,255,.35);background:#fff;
}
.btn-outline:hover{background:var(--brand-soft);border-color:var(--brand)}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}

.menu-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  align-items:center;justify-content:center;background:#fff;
}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand)}
.mobile-drawer{
  position:fixed;left:0;right:0;top:60px;bottom:0;z-index:70;
  background:rgba(255,255,255,.98);backdrop-filter:blur(16px);
  padding:20px clamp(16px,4vw,32px) 24px;
  transform:translateY(-14px);opacity:0;pointer-events:none;
  transition:transform .22s var(--ease),opacity .22s var(--ease);
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateY(0);opacity:1;pointer-events:auto}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:20px}
.drawer-nav a{
  display:flex;align-items:center;min-height:52px;padding:0 14px;border-radius:14px;
  font-size:16px;font-weight:500;color:#334155;border:1px solid transparent;
}
.drawer-nav a:hover{background:var(--brand-soft);color:var(--brand)}
.drawer-nav a.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600;border-color:rgba(47,107,255,.25)}
.drawer-search{margin-bottom:20px}
.drawer-search input{
  width:100%;height:48px;padding:0 16px;border-radius:14px;border:1px solid var(--line);
  background:#F8FAFC;outline:none;
}
.drawer-search input:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 2px rgba(47,107,255,.2)}

/* ============ Hero ============ */
.hero-page{
  position:relative;overflow:hidden;background:var(--ink-900);color:#fff;
  padding:clamp(44px,6vw,76px) 0 clamp(52px,7vw,88px);
}
.hero-bg{
  position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;opacity:.42;
}
.hero-veil{
  position:absolute;inset:0;
  background:
    radial-gradient(900px 420px at 12% 10%, rgba(47,107,255,.30), transparent 62%),
    linear-gradient(100deg, rgba(6,10,22,.95) 0%, rgba(6,10,22,.80) 52%, rgba(6,10,22,.60) 100%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.35fr .9fr;gap:clamp(24px,4vw,56px);align-items:center}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:#94A3B8;margin-bottom:18px;
}
.breadcrumb a:hover{color:#fff}
.breadcrumb .sep{opacity:.5}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:16px;
  padding:6px 14px;border-radius:var(--radius-pill);font-size:13px;font-weight:600;
  color:#BFD4FF;background:rgba(47,107,255,.16);border:1px solid rgba(148,190,255,.28);
}
.hero-page h1{
  font-size:clamp(30px,4.2vw,50px);line-height:1.16;font-weight:700;color:#FFFFFF;
  letter-spacing:-.015em;
}
.hero-lead{
  margin-top:18px;max-width:640px;font-size:clamp(16px,1.5vw,18px);line-height:1.85;color:#CBD5E1;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.meta-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:var(--radius-pill);font-size:13px;color:#D7E2F5;
  background:rgba(255,255,255,.055);border:1px solid rgba(148,190,255,.18);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.chip b{color:#fff;font-weight:600}
.chip .mono{color:#8FE3F5}

.hero-visual{position:relative;padding:14px}
.hero-shot{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid rgba(148,190,255,.22);
  background:rgba(255,255,255,.05);
  box-shadow:0 0 40px rgba(47,107,255,.18), inset 0 1px 0 rgba(255,255,255,.10);
  transform:perspective(1200px) rotateY(-6deg) rotateX(2deg);
}
.hero-shot img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-shot-caption{
  position:absolute;left:0;right:0;bottom:0;padding:16px 18px;
  background:linear-gradient(180deg, rgba(6,10,22,0), rgba(6,10,22,.88));
  font-size:13px;color:#D7E2F5;
}

/* ============ 通用板块标题 ============ */
.section-head{max-width:760px;margin-bottom:clamp(24px,4vw,40px)}
.section-kicker{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:12px;
  font-size:13px;font-weight:600;color:var(--brand);letter-spacing:.04em;
}
.section-kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--brand),var(--cyan))}
.section-title{font-size:clamp(24px,3vw,36px);line-height:1.28;font-weight:700;color:var(--text);letter-spacing:-.015em}
.section-title.on-dark{color:#fff}
.section-sub{margin-top:14px;font-size:16px;line-height:1.85;color:var(--muted)}
.section-sub.on-dark{color:#94A3B8}

/* ============ 平台切换 ============ */
.platform-tabs{
  display:inline-flex;flex-wrap:wrap;gap:6px;padding:6px;
  background:#EAEEF6;border-radius:var(--radius-pill);border:1px solid rgba(15,23,42,.05);
}
.platform-tab{
  display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 20px;
  border-radius:var(--radius-pill);font-size:15px;font-weight:500;color:#475569;
  transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.platform-tab:hover{color:var(--brand);background:rgba(255,255,255,.7)}
.platform-tab.is-active{
  color:var(--brand);font-weight:600;background:#fff;box-shadow:0 4px 14px rgba(15,23,42,.10);
}
.platform-panel{display:none;margin-top:32px}
.platform-panel.is-active{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(20px,3vw,32px);align-items:start;animation:fadeUp .32s var(--ease)}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

.spec-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);overflow:hidden;
}
.spec-card-head{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;border-bottom:1px solid var(--line);
}
.spec-card-head h3{font-size:18px;font-weight:600;color:var(--text)}
.badge-version{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--radius-pill);
  font-family:var(--font-mono);font-size:13px;font-weight:600;color:#8A3D0B;
  background:rgba(255,138,61,.14);border:1px solid rgba(255,138,61,.30);
}
.spec-list{padding:6px 0}
.spec-row{
  display:grid;grid-template-columns:132px 1fr;gap:16px;align-items:center;
  padding:13px 24px;border-bottom:1px solid #EEF2F8;
  transition:background .2s var(--ease);
}
.spec-row:last-child{border-bottom:0}
.spec-row:hover{background:#F6F9FF}
.spec-row dt{font-size:14px;color:var(--muted)}
.spec-row dd{font-size:14px;color:var(--text);font-weight:500}
.spec-row dd.mono{font-family:var(--font-mono);font-size:13.5px;color:#1E293B}

.download-side{display:flex;flex-direction:column;gap:16px}
.download-box{
  padding:24px;border-radius:var(--radius-card);background:var(--ink-900);color:#E2E8F0;
  border:1px solid rgba(148,190,255,.16);
  box-shadow:0 0 40px rgba(47,107,255,.16), inset 0 1px 0 rgba(255,255,255,.08);
}
.download-box h3{font-size:17px;font-weight:600;color:#fff;margin-bottom:8px}
.download-box p{font-size:14px;color:#94A3B8;line-height:1.8;margin-bottom:18px}
.download-alt{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.pill-link{
  display:inline-flex;align-items:center;gap:7px;min-height:38px;padding:0 14px;
  border-radius:var(--radius-pill);font-size:13px;color:#D7E2F5;
  background:rgba(255,255,255,.06);border:1px solid rgba(148,190,255,.20);
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.pill-link:hover{background:rgba(255,255,255,.13);border-color:rgba(148,190,255,.5);color:#fff}

.note-card{
  padding:20px 22px;border-radius:var(--radius-card);background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow-soft);
}
.note-card h4{font-size:15px;font-weight:600;color:var(--text);margin-bottom:10px}
.note-card ul{display:flex;flex-direction:column;gap:8px}
.note-card li{position:relative;padding-left:20px;font-size:14px;color:var(--text-2);line-height:1.8}
.note-card li::before{
  content:"";position:absolute;left:2px;top:11px;width:7px;height:7px;border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--cyan));
}

/* ============ 编号步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(16px,2.4vw,24px);counter-reset:step}
.step-item{
  position:relative;padding:28px 24px 24px;border-radius:var(--radius-card);background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow-soft);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.step-item:hover{transform:translateY(-4px);border-color:rgba(47,107,255,.32);box-shadow:0 16px 36px rgba(15,23,42,.10)}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
  border-radius:14px;margin-bottom:16px;font-family:var(--font-mono);font-size:15px;font-weight:600;
  color:var(--brand);background:var(--brand-soft);border:1px solid rgba(47,107,255,.20);
}
.step-item h3{font-size:18px;font-weight:600;color:var(--text);margin-bottom:10px}
.step-item p{font-size:15px;color:var(--muted);line-height:1.85}

/* ============ 系统要求 ============ */
.req-table{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);overflow:hidden;
}
.req-head,.req-row{display:grid;grid-template-columns:1.1fr 1.3fr 1.3fr 1fr;gap:16px;padding:16px 24px;align-items:center}
.req-head{
  font-size:13px;font-weight:600;color:var(--muted);letter-spacing:.04em;
  background:#F8FAFD;border-bottom:1px solid var(--line);
}
.req-row{border-bottom:1px solid #EEF2F8;font-size:14.5px;color:var(--text-2);transition:background .2s var(--ease)}
.req-row:last-child{border-bottom:0}
.req-row:hover{background:#F6F9FF}
.req-row .plat{font-weight:600;color:var(--text);display:flex;align-items:center;gap:10px}
.req-row .plat span.dot{
  width:9px;height:9px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--cyan));flex:0 0 auto;
}
.req-row .num{font-family:var(--font-mono);font-size:13.5px;color:#1E293B}

/* ============ 校验图文 ============ */
.verify-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,52px);align-items:center}
.verify-figure{
  border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-card);background:#fff;
}
.verify-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.verify-list{display:flex;flex-direction:column;gap:16px;margin-top:26px}
.verify-item{
  display:flex;gap:16px;padding:18px 20px;border-radius:var(--radius-card);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-soft);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.verify-item:hover{transform:translateY(-3px);border-color:rgba(47,107,255,.30)}
.verify-icon{
  flex:0 0 auto;width:40px;height:40px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-soft);border:1px solid rgba(47,107,255,.20);
}
.verify-item h3{font-size:16px;font-weight:600;color:var(--text);margin-bottom:6px}
.verify-item p{font-size:14.5px;color:var(--muted);line-height:1.8}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:16px;margin-bottom:12px;
  overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item:hover{border-color:rgba(47,107,255,.28)}
.faq-item.is-open{border-color:rgba(47,107,255,.36);box-shadow:0 12px 30px rgba(15,23,42,.08)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;text-align:left;font-size:16px;font-weight:600;color:var(--text);
  min-height:44px;
}
.faq-q .plus{
  flex:0 0 auto;position:relative;width:22px;height:22px;border-radius:50%;
  background:var(--brand-soft);transition:transform .24s var(--ease),background .24s var(--ease);
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-q .plus::before{width:10px;height:2px}
.faq-q .plus::after{width:2px;height:10px}
.faq-item.is-open .faq-q .plus{transform:rotate(45deg);background:rgba(255,138,61,.16)}
.faq-item.is-open .faq-q .plus::before,.faq-item.is-open .faq-q .plus::after{background:var(--amber)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a-inner{padding:0 22px 22px;font-size:15px;color:var(--muted);line-height:1.9}

/* ============ CTA 带 ============ */
.cta-band{background:var(--ink-900);color:#fff;position:relative;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(700px 300px at 78% 20%, rgba(47,107,255,.34), transparent 65%),
             radial-gradient(600px 260px at 10% 90%, rgba(34,211,238,.20), transparent 68%);
}
.cta-inner{
  position:relative;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:24px;padding:clamp(36px,5vw,56px) 0;
}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;color:#fff;line-height:1.35;max-width:620px}
.cta-inner p{margin-top:10px;font-size:15px;color:#94A3B8;max-width:620px}

/* ============ Footer ============ */
.site-footer{background:#060A16;color:#94A3B8;padding:clamp(48px,6vw,72px) 0 28px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:clamp(24px,4vw,48px)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-text{color:#fff;font-size:17px;font-weight:700}
.footer-about{line-height:1.9;color:#8494AC;max-width:360px}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social span{
  width:38px;height:38px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;color:#BFD4FF;background:rgba(255,255,255,.055);border:1px solid rgba(148,190,255,.16);
}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{color:#94A3B8;transition:color .2s var(--ease)}
.footer-col a:hover{color:#fff}
.footer-col li{line-height:1.7}
.footer-bottom{
  margin-top:clamp(32px,4vw,48px);padding-top:22px;border-top:1px solid rgba(148,190,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:#64748B;
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .header-inner{height:60px;gap:12px}
  .nav-center{display:none}
  .search-box{display:none}
  .menu-toggle{display:inline-flex}
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero-shot{transform:none}
  .platform-panel.is-active{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .verify-grid{grid-template-columns:1fr;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .req-head{display:none}
  .req-row{grid-template-columns:1fr;gap:6px;padding:18px 20px}
  .req-row .cell::before{
    content:attr(data-label);display:block;font-size:12.5px;color:var(--muted);margin-bottom:2px;
  }
}
@media (max-width:640px){
  body{font-size:15.5px}
  .brand-text{font-size:16px}
  .steps{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .meta-chips{gap:8px}
  .chip{font-size:12.5px;padding:7px 12px}
  .platform-tabs{width:100%;justify-content:flex-start;border-radius:18px}
  .platform-tab{flex:1 1 auto;justify-content:center;padding:0 14px;font-size:14px}
  .spec-row{grid-template-columns:1fr;gap:4px;padding:14px 18px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-inner .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
}

/* roulang page: category2 */
:root{
    --ink-900:#060A16;
    --ink-800:#0C1428;
    --ink-700:#121C36;
    --brand:#2F6BFF;
    --brand-600:#1E56E6;
    --cyan:#22D3EE;
    --amber:#FF8A3D;
    --light-bg:#F5F7FB;
    --card:#FFFFFF;
    --text:#334155;
    --title:#0F172A;
    --muted:#64748B;
    --line:#E2E8F0;
    --glass:rgba(255,255,255,.055);
    --glass-line:rgba(148,190,255,.16);
    --radius-sm:12px;
    --radius:16px;
    --radius-lg:20px;
    --shadow-card:0 10px 30px rgba(15,23,42,.08);
    --shadow-glow:0 0 40px rgba(47,107,255,.18);
    --shadow-cta:0 8px 24px rgba(255,138,61,.35);
    --container:1200px;
    --nav-h:68px;
    --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;line-height:1.85;color:var(--text);background:#fff;
    -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  }
  img{max-width:100%;height:auto;display:block}
  a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background .2s ease}
  button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
  input{font:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4{margin:0;font-weight:700;color:var(--title);line-height:1.3}
  p{margin:0}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
  .mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}
  .container{width:100%;max-width:var(--container);margin:0 auto;padding:0 clamp(16px,4vw,32px)}
  .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}

  /* ============ Header ============ */
  .site-header{
    position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);
    -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
    border-bottom:1px solid rgba(15,23,42,.08);
    transition:box-shadow .25s ease,background .25s ease;
  }
  .site-header.is-scrolled{box-shadow:0 2px 12px rgba(15,23,42,.08);background:rgba(255,255,255,.97)}
  .header-inner{display:flex;align-items:center;gap:18px;height:var(--nav-h)}
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .brand-mark{
    width:34px;height:34px;border-radius:11px;display:grid;place-items:center;flex-shrink:0;
    background:linear-gradient(135deg,#2F6BFF,#22D3EE);box-shadow:0 6px 16px rgba(47,107,255,.32);
  }
  .brand-text{font-size:17px;font-weight:700;color:#0F172A;letter-spacing:.2px;white-space:nowrap}
  .nav-center{display:flex;align-items:center;gap:2px;margin-left:10px}
  .nav-link{position:relative;padding:10px 14px;font-size:15px;font-weight:500;color:#475569;border-radius:10px;white-space:nowrap}
  .nav-link:hover{color:var(--brand);background:rgba(47,107,255,.06)}
  .nav-link.is-active{color:var(--brand);font-weight:600}
  .nav-link.is-active::after{
    content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;border-radius:2px;
    background:linear-gradient(90deg,#2F6BFF,#22D3EE);
  }
  .header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
  .search-box{
    display:flex;align-items:center;gap:8px;width:232px;height:40px;padding:0 14px;
    border-radius:999px;background:#F1F5F9;border:1px solid transparent;transition:.2s ease;
  }
  .search-box:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,107,255,.16)}
  .search-box input{width:100%;border:0;background:transparent;outline:none;font-size:14px;color:#0F172A}
  .search-box input::placeholder{color:#94A3B8}
  .search-box svg{flex-shrink:0;color:#64748B}

  /* ============ Buttons ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;
    border-radius:999px;font-size:15px;font-weight:600;white-space:nowrap;
    transition:transform .2s cubic-bezier(.2,.8,.2,1),box-shadow .25s ease,background .25s ease,color .25s ease,border-color .25s ease,filter .25s ease;
  }
  .btn-sm{height:40px;padding:0 18px;font-size:14px}
  .btn-lg{height:50px;padding:0 28px;font-size:16px}
  .btn-cta{background:linear-gradient(120deg,#FF8A3D,#FF6B1A);color:#fff;box-shadow:var(--shadow-cta)}
  .btn-cta:hover{filter:brightness(1.08);box-shadow:0 12px 30px rgba(255,138,61,.48);transform:translateY(-1px)}
  .btn-cta:active{transform:scale(.98)}
  .btn-primary{background:linear-gradient(120deg,#2F6BFF,#22D3EE);color:#fff;box-shadow:0 8px 26px rgba(47,107,255,.38)}
  .btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 12px 32px rgba(47,107,255,.48)}
  .btn-primary:active{transform:scale(.98)}
  .btn-ghost{border:1px solid var(--line);background:#fff;color:#0F172A}
  .btn-ghost:hover{border-color:var(--brand);color:var(--brand);box-shadow:0 10px 24px rgba(47,107,255,.14)}
  .btn-glass{border:1px solid var(--glass-line);background:var(--glass);color:#E2E8F0;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}
  .btn-glass:hover{background:rgba(255,255,255,.12);border-color:rgba(148,190,255,.42);color:#fff;transform:translateY(-1px)}

  .menu-toggle{
    display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
    place-items:center;color:#0F172A;background:#fff;
  }
  .menu-toggle:hover{border-color:var(--brand);color:var(--brand)}
  .menu-toggle svg{pointer-events:none}

  .mobile-drawer{
    position:fixed;left:0;right:0;top:var(--nav-h);bottom:0;z-index:55;
    background:rgba(255,255,255,.98);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    padding:20px clamp(16px,4vw,32px) 110px;overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
  }
  .mobile-drawer.is-open{opacity:1;visibility:visible;transform:none}
  .drawer-search{display:flex;align-items:center;gap:10px;height:46px;padding:0 16px;border-radius:12px;background:#F1F5F9;margin-bottom:18px}
  .drawer-search input{width:100%;border:0;background:transparent;outline:none;font-size:15px}
  .drawer-nav{display:grid;gap:6px}
  .drawer-nav a{padding:14px 16px;border-radius:12px;font-size:16px;font-weight:500;color:#334155;border:1px solid transparent}
  .drawer-nav a:hover{background:#F1F5F9}
  .drawer-nav a.is-active{color:var(--brand);font-weight:600;background:rgba(47,107,255,.08);border-color:rgba(47,107,255,.2)}
  .drawer-cta{margin-top:22px;display:grid;gap:12px}

  /* ============ Hero ============ */
  .hero-inner{position:relative;overflow:hidden;background:var(--ink-900);color:#E2E8F0;padding:56px 0 72px}
  .hero-bg{
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-1.webp');
    background-size:cover;background-position:center;opacity:.3;
  }
  .hero-mask{
    position:absolute;inset:0;
    background:
      radial-gradient(760px 420px at 82% 12%,rgba(47,107,255,.34),transparent 70%),
      linear-gradient(112deg,rgba(6,10,22,.97) 0%,rgba(6,10,22,.88) 46%,rgba(12,20,40,.74) 100%);
  }
  .hero-inner .container{position:relative;z-index:2}
  .hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:52px;align-items:center}
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:#94A3B8;margin-bottom:20px;flex-wrap:wrap}
  .breadcrumb a:hover{color:#fff}
  .breadcrumb .sep{color:#475569}
  .hero-badge{
    display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;border-radius:999px;
    background:rgba(47,107,255,.14);border:1px solid rgba(148,190,255,.26);
    font-size:13px;font-weight:600;color:#A9C6FF;letter-spacing:.04em;
  }
  .hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
  .hero-title{
    margin:18px 0 0;color:#fff;font-weight:700;line-height:1.18;
    font-size:clamp(28px,4.2vw,50px);letter-spacing:-.01em;
  }
  .hero-lead{margin-top:18px;font-size:17px;line-height:1.9;color:#C7D3E6;max-width:620px}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
  .hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
  .hero-chip-item{
    display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 14px;border-radius:999px;
    background:var(--glass);border:1px solid var(--glass-line);
    font-size:13px;color:#CBD5E1;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  }
  .hero-chip-item .mono{color:#fff}
  .hero-nav-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;padding-top:22px;border-top:1px solid rgba(148,190,255,.16)}
  .hero-nav-chips a{font-size:14px;color:#94A3B8;padding:6px 0;border-bottom:1px solid transparent}
  .hero-nav-chips a:hover{color:#fff;border-color:var(--cyan)}

  .hero-visual{position:relative;padding:14px}
  .hero-shot{
    position:relative;border-radius:20px;overflow:hidden;
    border:1px solid rgba(148,190,255,.22);background:rgba(255,255,255,.06);
    box-shadow:0 0 60px rgba(47,107,255,.28);
    transform:perspective(1200px) rotateY(-6deg) rotateX(2deg);
    transition:transform .5s cubic-bezier(.2,.8,.2,1);
  }
  .hero-shot:hover{transform:perspective(1200px) rotateY(-2deg) rotateX(0deg)}
  .hero-shot img{width:100%;aspect-ratio:16/10;object-fit:cover}
  .hero-float{
    position:absolute;left:-6px;bottom:-16px;display:flex;align-items:center;gap:12px;
    padding:14px 18px;border-radius:16px;background:rgba(12,20,40,.86);
    border:1px solid rgba(148,190,255,.24);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    box-shadow:0 18px 40px rgba(0,0,0,.4);
  }
  .hero-float .ring{
    width:38px;height:38px;border-radius:12px;display:grid;place-items:center;flex-shrink:0;
    background:linear-gradient(135deg,rgba(47,107,255,.35),rgba(34,211,238,.28));
    border:1px solid rgba(148,190,255,.3);color:#BBD3FF;
  }
  .hero-float strong{display:block;font-size:14px;color:#fff;font-weight:600}
  .hero-float span{font-size:12.5px;color:#94A3B8}

  /* ============ Sections ============ */
  .section{padding:80px 0}
  .section-light{background:var(--light-bg)}
  .section-dark{background:var(--ink-900);color:#CBD5E1}
  .section-head{max-width:780px;margin-bottom:46px}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
    letter-spacing:.1em;color:var(--brand);text-transform:uppercase;
  }
  .eyebrow::before{content:"";width:20px;height:2px;border-radius:2px;background:linear-gradient(90deg,#2F6BFF,#22D3EE)}
  .section-title{margin-top:14px;font-size:clamp(23px,3vw,35px);line-height:1.28;color:var(--title)}
  .section-dark .section-title{color:#fff}
  .section-sub{margin-top:14px;font-size:16px;color:var(--muted);line-height:1.9}
  .section-dark .section-sub{color:#94A3B8}

  /* ============ Zigzag ============ */
  .zrow{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:44px 0}
  .zrow + .zrow{border-top:1px solid var(--line)}
  .z-index{
    display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);
    font-size:13px;font-weight:600;color:var(--brand);letter-spacing:.12em;
  }
  .z-index::after{content:"";width:32px;height:1px;background:linear-gradient(90deg,#2F6BFF,transparent)}
  .z-title{margin-top:12px;font-size:clamp(20px,2.4vw,26px);color:var(--title)}
  .z-text{margin-top:14px;font-size:15.5px;line-height:1.95;color:#475569}
  .point-list{margin-top:20px;display:grid;gap:12px}
  .point-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:#475569;line-height:1.8}
  .point-list .tick{
    flex-shrink:0;width:22px;height:22px;margin-top:3px;border-radius:7px;display:grid;place-items:center;
    background:rgba(47,107,255,.1);border:1px solid rgba(47,107,255,.24);color:var(--brand);
  }
  .z-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 22px 48px rgba(15,23,42,.18)}
  .z-media img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform .6s cubic-bezier(.2,.8,.2,1)}
  .z-media:hover img{transform:scale(1.04)}
  .z-media::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(6,10,22,0) 42%,rgba(6,10,22,.66) 100%);
  }
  .z-media-cap{position:absolute;left:20px;right:20px;bottom:18px;z-index:2;color:#fff}
  .z-media-cap strong{display:block;font-size:15px;font-weight:600}
  .z-media-cap span{font-size:13px;color:#CBD5E1}
  .z-media-tag{
    position:absolute;left:20px;top:18px;z-index:2;height:28px;padding:0 12px;border-radius:999px;
    display:inline-flex;align-items:center;font-size:12.5px;font-weight:600;color:#DBEAFE;
    background:rgba(6,10,22,.55);border:1px solid rgba(148,190,255,.3);
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  }

  /* ============ Ability grid ============ */
  .grid-ability{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  .ability{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;
    transition:transform .22s cubic-bezier(.2,.8,.2,1),box-shadow .25s ease,border-color .25s ease;
  }
  .ability:hover{transform:translateY(-4px);box-shadow:0 18px 34px rgba(15,23,42,.1);border-color:rgba(47,107,255,.36)}
  .ability-icon{
    width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
    border:1px solid rgba(47,107,255,.26);background:rgba(47,107,255,.06);color:var(--brand);
  }
  .ability h3{margin-top:18px;font-size:17px;color:var(--title)}
  .ability p{margin-top:10px;font-size:14.5px;line-height:1.85;color:#64748B}

  /* ============ Steps ============ */
  .steps{display:grid;gap:0;border-top:1px solid var(--line)}
  .step{
    display:grid;grid-template-columns:76px 1fr;gap:22px;align-items:start;
    padding:26px 8px;border-bottom:1px solid var(--line);transition:background .22s ease;
  }
  .step:hover{background:rgba(47,107,255,.045)}
  .step-num{
    font-family:var(--mono);font-size:26px;font-weight:700;line-height:1;
    color:transparent;-webkit-text-stroke:1.4px rgba(47,107,255,.55);
  }
  .step h3{font-size:18px;color:var(--title)}
  .step p{margin-top:8px;font-size:15px;color:#64748B;line-height:1.85}
  .step .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}

  .tag{
    display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
    font-size:12.5px;font-weight:600;background:rgba(47,107,255,.09);color:#1E56E6;
    border:1px solid rgba(47,107,255,.2);
  }
  .tag-cyan{background:rgba(34,211,238,.12);color:#0E7490;border-color:rgba(34,211,238,.3)}
  .tag-amber{background:rgba(255,138,61,.12);color:#B45309;border-color:rgba(255,138,61,.3)}
  .tag-slate{background:#EEF2F7;color:#475569;border-color:#E2E8F0}

  /* ============ Spec table ============ */
  .spec-table{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
  .spec-row{
    display:grid;grid-template-columns:1.05fr 1.25fr 1.35fr .8fr;gap:16px;align-items:center;
    padding:18px 22px;border-bottom:1px solid var(--line);transition:background .2s ease;
  }
  .spec-row:last-child{border-bottom:0}
  .spec-row:hover{background:rgba(47,107,255,.05)}
  .spec-head{background:#F8FAFC;font-size:13px;font-weight:700;color:#475569;letter-spacing:.05em}
  .spec-head:hover{background:#F8FAFC}
  .spec-plat{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:600;color:var(--title)}
  .spec-plat .badge{
    width:30px;height:30px;border-radius:9px;display:grid;place-items:center;flex-shrink:0;
    background:rgba(47,107,255,.08);border:1px solid rgba(47,107,255,.2);color:var(--brand);
    font-size:12px;font-weight:700;font-family:var(--mono);
  }
  .spec-cell{font-size:14.5px;color:#475569}
  .spec-cell.mono{font-family:var(--mono);color:#0F172A;font-size:14px}
  .spec-note{margin-top:14px;font-size:13px;color:#94A3B8}

  /* ============ FAQ ============ */
  .faq-wrap{display:grid;gap:14px;max-width:900px}
  .faq-item{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
    transition:border-color .22s ease,box-shadow .25s ease;
  }
  .faq-item:hover{border-color:rgba(47,107,255,.34)}
  .faq-item.is-open{border-color:rgba(47,107,255,.46);box-shadow:0 14px 34px rgba(47,107,255,.12)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:20px 22px;font-size:16px;font-weight:600;color:var(--title);text-align:left;line-height:1.6;
  }
  .faq-icon{
    flex-shrink:0;width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
    background:rgba(47,107,255,.08);border:1px solid rgba(47,107,255,.2);color:var(--brand);
    transition:transform .24s ease,background .24s ease;
  }
  .faq-item.is-open .faq-icon{transform:rotate(45deg);background:rgba(47,107,255,.14)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
  .faq-a-inner{padding:0 22px 22px;font-size:15px;line-height:1.9;color:#475569}

  /* ============ CTA band ============ */
  .cta-band{position:relative;overflow:hidden;background:linear-gradient(118deg,#0C1428 0%,#121C36 60%,#0C1428 100%);padding:60px 0}
  .cta-band-bg{
    position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.png');
    background-size:cover;background-position:center;opacity:.16;
  }
  .cta-band::after{
    content:"";position:absolute;inset:0;
    background:radial-gradient(620px 320px at 78% 20%,rgba(255,138,61,.22),transparent 70%);
  }
  .cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap}
  .cta-inner h2{color:#fff;font-size:clamp(22px,2.8vw,32px);line-height:1.3;max-width:640px}
  .cta-inner p{margin-top:12px;color:#94A3B8;font-size:15.5px;max-width:600px}
  .cta-actions{display:flex;gap:14px;flex-wrap:wrap}

  /* ============ Footer ============ */
  .site-footer{background:var(--ink-900);color:#94A3B8;padding:64px 0 28px;font-size:14px}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
  .footer-brand .brand-text{color:#fff}
  .footer-about{line-height:1.9;color:#94A3B8;margin-bottom:18px;max-width:420px}
  .footer-social{display:flex;gap:10px}
  .footer-social span{
    width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
    border:1px solid rgba(148,190,255,.18);background:rgba(255,255,255,.05);
    font-size:13px;color:#CBD5E1;transition:.22s ease;
  }
  .footer-social span:hover{border-color:rgba(148,190,255,.42);color:#fff;background:rgba(255,255,255,.1)}
  .footer-col h3{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
  .footer-col ul{display:grid;gap:10px}
  .footer-col a{color:#94A3B8}
  .footer-col a:hover{color:#fff}
  .footer-col li{line-height:1.7}
  .footer-bottom{
    margin-top:46px;padding-top:22px;border-top:1px solid rgba(148,190,255,.14);
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:#64748B;line-height:1.8;
  }

  /* ============ Responsive ============ */
  @media (max-width:1180px){
    .nav-link{padding:10px 11px;font-size:14.5px}
    .search-box{width:200px}
  }
  @media (max-width:1023px){
    :root{--nav-h:60px}
    .nav-center{display:none}
    .search-box{display:none}
    .menu-toggle{display:grid}
    .header-actions{gap:10px}
    .section{padding:64px 0}
    .hero-inner{padding:44px 0 60px}
    .hero-grid{grid-template-columns:1fr;gap:38px}
    .hero-visual{padding:6px 0 0}
    .hero-shot{transform:none}
    .hero-shot:hover{transform:none}
    .hero-float{left:12px;bottom:-14px}
    .zrow{grid-template-columns:1fr;gap:28px;padding:34px 0}
    .z-media{order:-1}
    .grid-ability{grid-template-columns:repeat(2,1fr)}
    .spec-row{grid-template-columns:1fr 1fr;gap:12px 18px;padding:16px 18px}
    .spec-head{display:none}
    .footer-grid{grid-template-columns:1.4fr 1fr;gap:34px}
    .cta-inner{gap:24px}
  }
  @media (max-width:767px){
    body{font-size:15.5px}
    .container{padding:0 18px}
    .brand-text{font-size:16px}
    .section{padding:48px 0}
    .hero-inner{padding:34px 0 52px}
    .hero-actions{gap:10px}
    .hero-actions .btn{width:100%}
    .hero-chips{gap:8px}
    .hero-chip-item{font-size:12.5px;height:32px;padding:0 12px}
    .grid-ability{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr;gap:30px}
    .footer-bottom{flex-direction:column;gap:8px}
    .step{grid-template-columns:56px 1fr;gap:16px;padding:22px 4px}
    .step-num{font-size:22px}
    .cta-actions .btn{width:100%}
    .z-media img{aspect-ratio:16/10}
  }
  @media (max-width:520px){
    .hero-title{font-size:26px}
    .hero-lead{font-size:15.5px}
    .section-title{font-size:23px}
    .faq-q{padding:17px 16px;font-size:15px}
    .faq-a-inner{padding:0 16px 18px;font-size:14.5px}
    .ability{padding:22px 18px}
    .spec-row{grid-template-columns:1fr}
    .spec-cell{font-size:14px}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  }

/* roulang page: category3 */
:root{
    --ink-900:#060A16;
    --ink-800:#0C1428;
    --ink-700:#121C36;
    --brand:#2F6BFF;
    --brand-dark:#1E4FD8;
    --cyan:#22D3EE;
    --amber:#FF8A3D;
    --light:#F5F7FB;
    --card:#FFFFFF;
    --title:#0F172A;
    --text:#334155;
    --muted:#64748B;
    --line:#E2E8F0;
    --success:#34D399;
    --warn:#FBBF24;
    --error:#F87171;
    --radius-sm:12px;
    --radius:16px;
    --radius-lg:20px;
    --pill:999px;
    --shadow-card:0 10px 30px rgba(15,23,42,.08);
    --shadow-soft:0 2px 12px rgba(15,23,42,.05);
    --shadow-glow:0 8px 24px rgba(255,138,61,.35);
    --container:1200px;
    --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
    --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
    --header-h:68px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:var(--font);
    font-size:16px;
    line-height:1.8;
    color:var(--text);
    background:#fff;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
  ul,ol{list-style:none;}
  a{color:inherit;text-decoration:none;transition:color .2s ease;}
  img{max-width:100%;display:block;}
  button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
  input{font-family:inherit;font-size:inherit;}
  .mono{font-family:var(--mono);letter-spacing:.02em;}

  a:focus-visible,button:focus-visible,input:focus-visible{
    outline:2px solid var(--brand);
    outline-offset:2px;
    border-radius:6px;
  }

  .container{
    width:100%;
    max-width:var(--container);
    margin:0 auto;
    padding:0 clamp(16px,4vw,32px);
  }

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;
    top:0;
    z-index:80;
    background:#fff;
    border-bottom:1px solid rgba(15,23,42,.08);
    box-shadow:var(--shadow-soft);
    transition:box-shadow .25s ease,background .25s ease,backdrop-filter .25s ease;
  }
  .site-header.is-scrolled{
    background:rgba(255,255,255,.92);
    backdrop-filter:blur(12px);
    box-shadow:0 6px 24px rgba(15,23,42,.09);
  }
  .header-inner{
    height:var(--header-h);
    display:flex;
    align-items:center;
    gap:18px;
  }
  .brand{
    display:flex;
    align-items:center;
    gap:10px;
    flex:0 0 auto;
    min-height:44px;
  }
  .brand-mark{
    width:34px;height:34px;
    border-radius:10px;
    display:inline-flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,var(--brand) 0%,#5B8BFF 55%,var(--cyan) 100%);
    box-shadow:0 6px 16px rgba(47,107,255,.32);
    flex:0 0 auto;
  }
  .brand-text{
    font-size:17px;
    font-weight:700;
    color:var(--title);
    letter-spacing:.01em;
    white-space:nowrap;
  }
  .nav-center{
    display:flex;
    align-items:center;
    gap:6px;
    margin-left:12px;
    flex:1 1 auto;
    min-width:0;
  }
  .nav-link{
    position:relative;
    font-size:15px;
    font-weight:500;
    color:#475569;
    padding:0 12px;
    height:44px;
    display:inline-flex;
    align-items:center;
    border-radius:10px;
    white-space:nowrap;
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:12px;right:12px;bottom:6px;
    height:2px;
    border-radius:2px;
    background:var(--brand);
    transform:scaleX(0);
    transform-origin:center;
    transition:transform .22s cubic-bezier(.2,.8,.2,1);
  }
  .nav-link:hover{color:var(--brand);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.is-active{color:var(--brand);font-weight:600;}
  .nav-link.is-active::after{transform:scaleX(1);}

  .header-actions{
    display:flex;
    align-items:center;
    gap:12px;
    flex:0 0 auto;
  }
  .nav-search{
    display:flex;
    align-items:center;
    gap:8px;
    width:220px;
    height:40px;
    padding:0 14px;
    background:#F1F5F9;
    border:1px solid transparent;
    border-radius:var(--pill);
    transition:background .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .nav-search:hover{background:#E9EFF7;}
  .nav-search:focus-within{
    background:#fff;
    border-color:var(--brand);
    box-shadow:0 0 0 2px rgba(47,107,255,.25);
  }
  .search-icon{flex:0 0 auto;color:#94A3B8;display:inline-flex;}
  .search-input{
    border:0;background:transparent;outline:none;
    width:100%;font-size:14px;color:var(--title);
  }
  .search-input::placeholder{color:#94A3B8;}

  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    font-size:15px;
    font-weight:600;
    border-radius:var(--pill);
    padding:0 22px;
    min-height:44px;
    transition:transform .18s cubic-bezier(.2,.8,.2,1),box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
    white-space:nowrap;
  }
  .btn:active{transform:scale(.98);}
  .btn-cta{
    height:40px;
    min-height:40px;
    padding:0 20px;
    color:#fff;
    background:linear-gradient(135deg,#FF9A54 0%,var(--amber) 60%,#F2701F 100%);
    box-shadow:var(--shadow-glow);
  }
  .btn-cta:hover{
    box-shadow:0 12px 30px rgba(255,138,61,.45);
    filter:brightness(1.06);
  }
  .btn-primary{
    color:#fff;
    background:linear-gradient(135deg,#4E86FF 0%,var(--brand) 55%,var(--brand-dark) 100%);
    box-shadow:0 10px 26px rgba(47,107,255,.32);
  }
  .btn-primary:hover{
    box-shadow:0 14px 34px rgba(47,107,255,.42);
    filter:brightness(1.06);
  }
  .btn-ghost{
    color:#E2E8F0;
    background:rgba(255,255,255,.06);
    border:1px solid rgba(148,190,255,.28);
  }
  .btn-ghost:hover{
    background:rgba(255,255,255,.12);
    border-color:rgba(148,190,255,.5);
  }
  .btn-outline{
    color:var(--brand);
    border:1px solid rgba(47,107,255,.4);
    background:#fff;
  }
  .btn-outline:hover{
    background:#F0F5FF;
    border-color:var(--brand);
  }

  .nav-toggle{
    display:none;
    width:44px;height:44px;
    border-radius:12px;
    align-items:center;
    justify-content:center;
    flex-direction:column;
    gap:5px;
    border:1px solid var(--line);
    background:#fff;
  }
  .nav-toggle span{
    display:block;
    width:18px;height:2px;
    border-radius:2px;
    background:#0F172A;
    transition:transform .22s ease,opacity .22s ease;
  }
  .nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle.is-open span:nth-child(2){opacity:0;}
  .nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  .mobile-drawer{
    position:fixed;
    left:0;right:0;top:60px;bottom:0;
    background:#fff;
    padding:16px 20px 96px;
    overflow-y:auto;
    transform:translateY(-10px);
    opacity:0;
    visibility:hidden;
    transition:transform .22s cubic-bezier(.2,.8,.2,1),opacity .22s ease,visibility .22s;
    z-index:70;
  }
  .mobile-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible;}
  .drawer-nav{display:flex;flex-direction:column;gap:4px;}
  .drawer-link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    min-height:52px;
    padding:0 14px;
    border-radius:12px;
    font-size:16px;
    font-weight:500;
    color:#334155;
    border:1px solid transparent;
  }
  .drawer-link:hover{background:#F5F7FB;color:var(--brand);}
  .drawer-link.is-active{
    background:#F0F5FF;
    color:var(--brand);
    font-weight:600;
    border-color:rgba(47,107,255,.18);
  }
  .drawer-search{
    display:flex;align-items:center;gap:8px;
    height:46px;padding:0 14px;margin-bottom:14px;
    background:#F1F5F9;border-radius:var(--pill);
  }
  .drawer-foot{
    position:fixed;
    left:0;right:0;bottom:0;
    padding:12px 20px calc(12px + env(safe-area-inset-bottom));
    background:rgba(255,255,255,.96);
    border-top:1px solid var(--line);
    backdrop-filter:blur(10px);
  }
  .drawer-foot .btn{width:100%;}

  /* ============ 内页 Hero ============ */
  .page-hero{
    position:relative;
    background:linear-gradient(160deg,var(--ink-900) 0%,var(--ink-800) 55%,#0B1A3A 100%);
    color:#E2E8F0;
    overflow:hidden;
    isolation:isolate;
  }
  .page-hero::before{
    content:"";
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-2.png');
    background-size:cover;
    background-position:center;
    opacity:.16;
    z-index:-1;
  }
  .page-hero::after{
    content:"";
    position:absolute;inset:0;
    background:
      radial-gradient(600px 300px at 12% 0%,rgba(34,211,238,.16),transparent 70%),
      radial-gradient(760px 380px at 92% 20%,rgba(47,107,255,.22),transparent 72%);
    z-index:-1;
    pointer-events:none;
  }
  .hero-inner{
    display:grid;
    grid-template-columns:1.15fr .85fr;
    gap:48px;
    align-items:center;
    padding:64px 0 68px;
  }
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    font-weight:600;
    letter-spacing:.06em;
    color:#9FD8FF;
    background:rgba(47,107,255,.16);
    border:1px solid rgba(120,170,255,.3);
    border-radius:var(--pill);
    padding:6px 14px;
    margin-bottom:18px;
  }
  .hero-title{
    font-size:clamp(30px,4.2vw,48px);
    line-height:1.18;
    font-weight:700;
    color:#fff;
    letter-spacing:.01em;
  }
  .hero-sub{
    margin-top:16px;
    font-size:clamp(15px,1.5vw,17px);
    line-height:1.85;
    color:#CBD5E1;
    max-width:620px;
  }
  .hero-chips{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-top:26px;
  }
  .chip{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-family:var(--mono);
    font-size:13px;
    color:#D6E4FF;
    padding:8px 14px;
    border-radius:var(--pill);
    background:rgba(255,255,255,.055);
    border:1px solid rgba(148,190,255,.18);
    backdrop-filter:blur(14px);
  }
  .chip b{font-weight:600;color:#fff;}
  .hero-actions{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    margin-top:28px;
  }
  .hero-visual{
    position:relative;
    border-radius:var(--radius-lg);
    overflow:hidden;
    border:1px solid rgba(148,190,255,.2);
    background:rgba(255,255,255,.055);
    backdrop-filter:blur(14px);
    box-shadow:0 0 40px rgba(47,107,255,.18);
    transform:rotate(-1.4deg);
  }
  .hero-visual img{
    width:100%;
    height:280px;
    object-fit:cover;
    opacity:.92;
  }
  .hero-visual-caption{
    padding:14px 18px;
    font-size:13px;
    color:#B9CBE8;
    border-top:1px solid rgba(148,190,255,.14);
    background:rgba(6,10,22,.35);
  }
  .hero-visual-caption .mono{color:#fff;}

  /* ============ 通用板块 ============ */
  .section{padding:80px 0;}
  .section-light{background:var(--light);}
  .section-dark{background:var(--ink-900);color:#CBD5E1;}
  .section-head{max-width:760px;margin-bottom:44px;}
  .section-title{
    font-size:clamp(24px,3vw,34px);
    line-height:1.3;
    font-weight:700;
    color:var(--title);
  }
  .section-dark .section-title{color:#fff;}
  .section-desc{
    margin-top:14px;
    font-size:16px;
    line-height:1.85;
    color:var(--muted);
  }
  .section-dark .section-desc{color:#94A3B8;}

  /* ============ 版本速览条 ============ */
  .stats-bar{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    border-top:1px solid rgba(148,190,255,.16);
    background:var(--ink-800);
  }
  .stat{
    padding:26px clamp(16px,2.4vw,30px);
    border-right:1px solid rgba(148,190,255,.12);
  }
  .stat:last-child{border-right:0;}
  .stat-num{
    font-family:var(--mono);
    font-size:22px;
    font-weight:600;
    color:#fff;
    letter-spacing:.02em;
  }
  .stat-label{
    margin-top:6px;
    font-size:13px;
    color:#94A3B8;
  }

  /* ============ 时间轴 ============ */
  .timeline{
    position:relative;
    margin-top:8px;
  }
  .timeline::before{
    content:"";
    position:absolute;
    left:9px;
    top:12px;
    bottom:12px;
    width:2px;
    border-radius:2px;
    background:linear-gradient(180deg,rgba(47,107,255,.55),rgba(34,211,238,.35),rgba(47,107,255,.08));
  }
  .tl-item{
    position:relative;
    padding-left:44px;
    margin-bottom:26px;
  }
  .tl-item:last-child{margin-bottom:0;}
  .tl-dot{
    position:absolute;
    left:0;
    top:26px;
    width:20px;height:20px;
    border-radius:50%;
    background:#fff;
    border:2px solid rgba(47,107,255,.45);
    box-shadow:0 0 0 5px rgba(47,107,255,.09);
    display:flex;align-items:center;justify-content:center;
  }
  .tl-dot::after{
    content:"";
    width:8px;height:8px;
    border-radius:50%;
    background:var(--brand);
  }
  .tl-item.is-latest .tl-dot{border-color:var(--amber);box-shadow:0 0 0 5px rgba(255,138,61,.14);}
  .tl-item.is-latest .tl-dot::after{background:var(--amber);}
  .tl-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-card);
    padding:24px clamp(18px,2.2vw,28px);
    transition:transform .2s cubic-bezier(.2,.8,.2,1),box-shadow .22s ease,border-color .22s ease;
  }
  .tl-card:hover{
    transform:translateY(-4px);
    border-color:rgba(47,107,255,.32);
    box-shadow:0 18px 40px rgba(15,23,42,.11);
  }
  .tl-head{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:12px;
    padding-bottom:14px;
    border-bottom:1px dashed var(--line);
  }
  .ver-badge{
    display:inline-flex;
    align-items:center;
    font-family:var(--mono);
    font-size:15px;
    font-weight:600;
    color:#fff;
    background:linear-gradient(135deg,#4E86FF,var(--brand-dark));
    border-radius:10px;
    padding:5px 12px;
    letter-spacing:.02em;
  }
  .tl-item.is-latest .ver-badge{
    background:linear-gradient(135deg,#FFA76B,var(--amber));
    box-shadow:0 6px 16px rgba(255,138,61,.32);
  }
  .tl-date{
    font-family:var(--mono);
    font-size:13px;
    color:var(--muted);
  }
  .tl-latest-tag{
    font-size:12px;
    font-weight:600;
    color:#B45309;
    background:#FFF3E6;
    border:1px solid rgba(255,138,61,.35);
    border-radius:var(--pill);
    padding:3px 10px;
  }
  .tl-list{
    margin-top:16px;
    display:flex;
    flex-direction:column;
    gap:10px;
  }
  .tl-list li{
    display:flex;
    gap:12px;
    align-items:flex-start;
    font-size:15px;
    line-height:1.8;
    color:var(--text);
  }
  .tl-list li::before{
    content:"";
    flex:0 0 auto;
    width:6px;height:6px;
    margin-top:11px;
    border-radius:50%;
    background:#94A3B8;
  }
  .tag{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    font-size:12px;
    font-weight:600;
    border-radius:var(--pill);
    padding:3px 10px;
    white-space:nowrap;
  }
  .tag-new{color:#065F46;background:#DCFCE7;}
  .tag-opt{color:#1E3A8A;background:#DBEAFE;}
  .tag-fix{color:#9A3412;background:#FFEDD5;}

  /* ============ 说明区 / 图例 ============ */
  .split{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:24px;
    align-items:start;
  }
  .note-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-card);
    padding:28px clamp(20px,2.4vw,32px);
    height:100%;
  }
  .note-card h3{
    font-size:19px;
    font-weight:600;
    color:var(--title);
    margin-bottom:8px;
  }
  .note-card > p{
    font-size:15px;
    line-height:1.85;
    color:var(--muted);
    margin-bottom:18px;
  }
  .legend-row{
    display:flex;
    gap:14px;
    align-items:flex-start;
    padding:14px 0;
    border-bottom:1px solid var(--line);
  }
  .legend-row:last-child{border-bottom:0;padding-bottom:0;}
  .legend-text strong{
    display:block;
    font-size:15px;
    font-weight:600;
    color:var(--title);
    margin-bottom:4px;
  }
  .legend-text span{
    font-size:14px;
    line-height:1.8;
    color:var(--muted);
  }
  .num-list{display:flex;flex-direction:column;gap:16px;}
  .num-item{display:flex;gap:16px;align-items:flex-start;}
  .num-idx{
    flex:0 0 auto;
    width:38px;height:38px;
    border-radius:12px;
    display:flex;align-items:center;justify-content:center;
    font-family:var(--mono);
    font-size:15px;
    font-weight:600;
    color:var(--brand);
    background:#EFF4FF;
    border:1px solid rgba(47,107,255,.2);
  }
  .num-item strong{
    display:block;
    font-size:15px;
    font-weight:600;
    color:var(--title);
    margin-bottom:4px;
  }
  .num-item p{font-size:14px;line-height:1.8;color:var(--muted);}

  /* ============ 图文区块 ============ */
  .feature-row{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:48px;
    align-items:center;
  }
  .feature-img{
    border-radius:var(--radius-lg);
    overflow:hidden;
    border:1px solid var(--line);
    box-shadow:var(--shadow-card);
    position:relative;
  }
  .feature-img img{width:100%;height:330px;object-fit:cover;}
  .feature-text h3{
    font-size:clamp(20px,2.4vw,26px);
    font-weight:700;
    color:var(--title);
    line-height:1.4;
    margin-bottom:14px;
  }
  .feature-text p{
    font-size:15.5px;
    line-height:1.9;
    color:var(--text);
    margin-bottom:14px;
  }
  .feature-list{display:flex;flex-direction:column;gap:12px;margin-top:20px;}
  .feature-list li{
    display:flex;gap:10px;align-items:flex-start;
    font-size:15px;color:var(--text);
  }
  .feature-list li svg{flex:0 0 auto;margin-top:5px;color:var(--brand);}

  /* ============ FAQ ============ */
  .faq{display:flex;flex-direction:column;gap:14px;max-width:900px;}
  .faq-item{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius);
    box-shadow:0 4px 14px rgba(15,23,42,.04);
    overflow:hidden;
    transition:border-color .22s ease,box-shadow .22s ease;
  }
  .faq-item.is-open{
    border-color:rgba(47,107,255,.36);
    box-shadow:0 12px 30px rgba(15,23,42,.09);
  }
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    text-align:left;
    padding:18px clamp(16px,2vw,24px);
    font-size:16px;
    font-weight:600;
    color:var(--title);
    min-height:56px;
  }
  .faq-q:hover{color:var(--brand);}
  .faq-icon{
    flex:0 0 auto;
    width:26px;height:26px;
    border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    color:var(--brand);
    background:#EFF4FF;
    border:1px solid rgba(47,107,255,.18);
    transition:transform .24s ease,background .22s ease;
  }
  .faq-item.is-open .faq-icon{transform:rotate(45deg);background:#DCE7FF;}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .24s ease;
  }
  .faq-a-inner{
    padding:0 clamp(16px,2vw,24px) 20px;
    font-size:15px;
    line-height:1.9;
    color:#475569;
    border-top:1px solid transparent;
  }
  .faq-item.is-open .faq-a-inner{border-top-color:var(--line);padding-top:16px;}

  /* ============ CTA 带 ============ */
  .cta-band{
    position:relative;
    background:linear-gradient(140deg,var(--ink-900) 0%,#10204A 60%,#0B1730 100%);
    color:#E2E8F0;
    overflow:hidden;
  }
  .cta-band::after{
    content:"";
    position:absolute;inset:0;
    background:radial-gradient(520px 260px at 82% 30%,rgba(255,138,61,.18),transparent 70%),
               radial-gradient(520px 260px at 12% 80%,rgba(34,211,238,.14),transparent 70%);
    pointer-events:none;
  }
  .cta-inner{
    position:relative;
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:24px;
    padding:44px 0;
  }
  .cta-title{
    font-size:clamp(20px,2.6vw,28px);
    font-weight:700;
    color:#fff;
  }
  .cta-desc{
    margin-top:8px;
    font-size:15px;
    color:#A9BBD6;
    max-width:640px;
  }
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

  /* ============ 页脚 ============ */
  .site-footer{
    background:#060A16;
    color:#94A3B8;
    padding:64px 0 26px;
    font-size:14px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1.2fr;
    gap:40px;
    padding-bottom:40px;
  }
  .footer-brand{
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:16px;
  }
  .footer-brand .brand-text{font-size:17px;font-weight:700;color:#fff;}
  .footer-about{
    font-size:14px;
    line-height:1.9;
    color:#8FA1BC;
    max-width:360px;
  }
  .footer-social{
    display:flex;
    gap:10px;
    margin-top:20px;
  }
  .footer-social span{
    width:40px;height:40px;
    border-radius:12px;
    display:flex;align-items:center;justify-content:center;
    font-size:13px;
    color:#9FD8FF;
    background:rgba(255,255,255,.055);
    border:1px solid rgba(148,190,255,.16);
    transition:background .2s ease,border-color .2s ease,color .2s ease;
  }
  .footer-social span:hover{background:rgba(47,107,255,.18);border-color:rgba(148,190,255,.4);color:#fff;}
  .footer-col h3{
    font-size:15px;
    font-weight:600;
    color:#fff;
    margin-bottom:16px;
  }
  .footer-col ul{display:flex;flex-direction:column;gap:11px;}
  .footer-col a{
    color:#94A3B8;
    font-size:14px;
    display:inline-flex;
    min-height:22px;
    align-items:center;
  }
  .footer-col a:hover{color:#fff;}
  .footer-col li span{color:#8FA1BC;font-size:14px;line-height:1.7;}
  .footer-bottom{
    border-top:1px solid rgba(148,190,255,.12);
    padding-top:22px;
    display:flex;
    flex-wrap:wrap;
    justify-content:space-between;
    gap:12px;
    font-size:13px;
    color:#64748B;
  }

  /* ============ 响应式 ============ */
  @media (max-width:1023px){
    :root{--header-h:60px;}
    .nav-center,.header-actions .nav-search,.header-actions .btn-cta{display:none;}
    .nav-toggle{display:inline-flex;}
    .header-inner{justify-content:space-between;}
    .hero-inner{grid-template-columns:1fr;gap:32px;padding:44px 0 52px;}
    .hero-visual{transform:none;}
    .hero-visual img{height:230px;}
    .section{padding:64px 0;}
    .stats-bar{grid-template-columns:repeat(2,1fr);}
    .stat{border-bottom:1px solid rgba(148,190,255,.12);}
    .stat:nth-child(2n){border-right:0;}
    .split{grid-template-columns:1fr;}
    .feature-row{grid-template-columns:1fr;gap:28px;}
    .feature-img img{height:260px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  }

  @media (max-width:767px){
    .section{padding:52px 0;}
    .section-head{margin-bottom:32px;}
    .timeline::before{left:6px;}
    .tl-item{padding-left:30px;}
    .tl-dot{width:16px;height:16px;top:28px;}
    .tl-dot::after{width:6px;height:6px;}
    .tl-card{padding:20px 18px;}
    .cta-inner{padding:36px 0;flex-direction:column;align-items:flex-start;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-bottom{flex-direction:column;}
    .brand-text{font-size:16px;}
  }

  @media (max-width:519px){
    .stats-bar{grid-template-columns:1fr;}
    .stat{border-right:0;}
    .hero-chips{gap:8px;}
    .chip{font-size:12px;padding:7px 12px;}
    .hero-actions .btn{width:100%;}
    .btn{padding:0 18px;}
    .tl-list li{font-size:14.5px;}
  }

/* roulang page: category4 */
:root{
    --ink-900:#060A16;
    --ink-800:#0C1428;
    --ink-700:#121C36;
    --blue:#2F6BFF;
    --cyan:#22D3EE;
    --amber:#FF8A3D;
    --bg-light:#F5F7FB;
    --card:#FFFFFF;
    --text:#334155;
    --title:#0F172A;
    --muted:#64748B;
    --line:#E2E8F0;
    --success:#34D399;
    --glass:rgba(255,255,255,.055);
    --glass-line:rgba(148,190,255,.16);
    --r-card:18px;
    --r-md:14px;
    --r-sm:12px;
    --sh-card:0 10px 30px rgba(15,23,42,.08);
    --sh-glass:0 0 40px rgba(47,107,255,.18);
    --font-sans:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
    --container:1200px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.8;
    color:var(--text);
    background:#fff;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;height:auto}
  a{color:inherit;text-decoration:none}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  button{font-family:inherit}
  input,select,textarea{font-family:inherit}
  :focus-visible{outline:2px solid var(--blue);outline-offset:2px}
  .mono{font-family:var(--font-mono)}

  .container{width:100%;max-width:var(--container);margin:0 auto;padding:0 clamp(16px,4vw,32px)}
  .section{padding:80px 0}
  .section--light{background:var(--bg-light)}
  .section--dark{background:var(--ink-900);color:#fff}

  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:600;letter-spacing:.12em;
    color:var(--blue);text-transform:uppercase;
  }
  .eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--blue),var(--cyan))}
  .section-title{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.28;color:var(--title);margin-top:12px}
  .section-sub{margin-top:14px;font-size:16px;color:var(--muted);max-width:760px}
  .section-head{margin-bottom:36px}

  /* ---------- Header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:#fff;
    border-bottom:1px solid rgba(15,23,42,.08);
    box-shadow:0 2px 12px rgba(15,23,42,.05);
    transition:box-shadow .25s ease,background .25s ease;
  }
  .site-header.is-scrolled{
    background:rgba(255,255,255,.92);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    box-shadow:0 8px 26px rgba(15,23,42,.10);
  }
  .header-inner{display:flex;align-items:center;gap:18px;height:68px}
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .brand-mark{
    width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
    background:linear-gradient(135deg,var(--blue),var(--cyan));
    box-shadow:0 6px 18px rgba(47,107,255,.35);
  }
  .brand-text{font-size:17px;font-weight:700;color:var(--title);letter-spacing:.2px}

  .nav-center{display:flex;align-items:center;gap:2px;margin:0 auto}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;height:44px;
    padding:0 14px;font-size:15px;font-weight:500;color:#475569;border-radius:10px;
    transition:color .2s ease,background .2s ease;
  }
  .nav-link::after{
    content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
    background:linear-gradient(90deg,var(--blue),var(--cyan));
    transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
  }
  .nav-link:hover{color:var(--blue);background:rgba(47,107,255,.06)}
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link.is-active{color:var(--blue);font-weight:600}
  .nav-link.is-active::after{transform:scaleX(1)}

  .header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
  .search-box{
    display:flex;align-items:center;gap:8px;height:40px;width:230px;padding:0 14px;
    background:#F1F5F9;border:1px solid transparent;border-radius:999px;
    transition:background .2s ease,border-color .2s ease,box-shadow .2s ease;
  }
  .search-box:hover{border-color:rgba(47,107,255,.3)}
  .search-box:focus-within{background:#fff;border-color:var(--blue);box-shadow:0 0 0 2px rgba(47,107,255,.22)}
  .search-box input{flex:1;border:0;background:transparent;outline:none;font-size:14px;color:var(--title);min-width:0}
  .search-box input::placeholder{color:#94A3B8}
  .search-box svg{flex-shrink:0}

  .nav-toggle{
    display:none;flex-direction:column;justify-content:center;gap:5px;
    width:44px;height:44px;padding:0 12px;background:#fff;
    border:1px solid var(--line);border-radius:12px;cursor:pointer;
  }
  .nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--title);transition:transform .2s ease,opacity .2s ease}
  .nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle.is-open span:nth-child(2){opacity:0}
  .nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

  .mobile-drawer{
    position:fixed;left:0;right:0;top:60px;bottom:0;z-index:55;
    background:#fff;padding:16px clamp(16px,4vw,32px) 32px;
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:transform .22s ease,opacity .22s ease;overflow-y:auto;
  }
  .mobile-drawer.is-open{transform:translateY(0);opacity:1;pointer-events:auto}
  .drawer-link{display:block;padding:15px 4px;font-size:16px;font-weight:500;color:var(--title);border-bottom:1px solid var(--line)}
  .drawer-link.is-active{color:var(--blue);font-weight:600}
  .drawer-cta{margin-top:22px;width:100%}

  /* ---------- Buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 22px;border-radius:999px;border:1px solid transparent;
    font-size:15px;font-weight:600;line-height:1;cursor:pointer;
    transition:transform .18s cubic-bezier(.2,.8,.2,1),box-shadow .22s ease,filter .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  }
  .btn:active{transform:scale(.98)}
  .btn-sm{height:40px;padding:0 18px;font-size:14px}
  .btn-primary{background:linear-gradient(135deg,#FF9A4D,#FF6A1F);color:#fff;box-shadow:0 8px 24px rgba(255,138,61,.35)}
  .btn-primary:hover{filter:brightness(1.08);box-shadow:0 10px 30px rgba(255,138,61,.45)}
  .btn-blue{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;box-shadow:0 8px 24px rgba(47,107,255,.32)}
  .btn-blue:hover{filter:brightness(1.07);box-shadow:0 10px 30px rgba(47,107,255,.42)}
  .btn-ghost{background:transparent;color:#fff;border-color:rgba(148,190,255,.42)}
  .btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(148,190,255,.7)}
  .btn-outline{background:#fff;color:var(--title);border-color:var(--line)}
  .btn-outline:hover{border-color:var(--blue);color:var(--blue);box-shadow:0 8px 22px rgba(47,107,255,.14)}

  .badge{
    display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
    font-size:12px;font-weight:600;letter-spacing:.02em;
  }
  .badge-blue{background:rgba(47,107,255,.10);color:#2453c9}
  .badge-cyan{background:rgba(34,211,238,.14);color:#0e7490}
  .badge-amber{background:rgba(255,138,61,.14);color:#c2410c}

  /* ---------- Page hero ---------- */
  .page-hero{position:relative;overflow:hidden;background:var(--ink-900);color:#fff}
  .page-hero::before{
    content:"";position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-1.webp');
    background-size:cover;background-position:center;
    opacity:.30;
  }
  .page-hero::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(112deg,rgba(6,10,22,.97) 0%,rgba(6,10,22,.86) 44%,rgba(12,20,40,.66) 100%);
  }
  .page-hero-inner{
    position:relative;z-index:2;
    display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;
    padding:72px 0 76px;
  }
  .hero-badge{
    display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
    background:rgba(47,107,255,.18);border:1px solid var(--glass-line);
    color:#BFD4FF;font-size:13px;font-weight:600;
  }
  .hero-title{font-size:clamp(30px,4vw,44px);font-weight:700;line-height:1.2;margin-top:18px;letter-spacing:-.01em}
  .hero-lead{margin-top:16px;font-size:17px;line-height:1.85;color:#CBD5E1;max-width:610px}
  .hero-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:26px;font-family:var(--font-mono);font-size:13px;color:#94A3B8}
  .hero-meta span.dot{color:#3B4A66}
  .hero-search{
    display:flex;align-items:center;gap:10px;margin-top:26px;padding:8px 8px 8px 20px;
    max-width:580px;border-radius:999px;
    background:var(--glass);border:1px solid var(--glass-line);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    transition:border-color .22s ease,box-shadow .22s ease;
  }
  .hero-search:focus-within{border-color:rgba(47,107,255,.75);box-shadow:0 0 0 3px rgba(47,107,255,.18)}
  .hero-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;color:#fff;font-size:15px;padding:8px 0}
  .hero-search input::placeholder{color:#8FA2BF}
  .hero-tags{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:18px}
  .hero-tags span.hint{font-size:13px;color:#7C8CA8}
  .tag-chip{
    font-size:13px;color:#CBD5E1;padding:6px 13px;border-radius:999px;cursor:pointer;
    border:1px solid rgba(148,190,255,.18);background:rgba(255,255,255,.04);
    transition:color .2s ease,border-color .2s ease,background .2s ease;
  }
  .tag-chip:hover{color:#fff;border-color:rgba(47,107,255,.65);background:rgba(47,107,255,.16)}

  .hero-visual{position:relative}
  .hero-shot{
    position:relative;border-radius:20px;overflow:hidden;
    border:1px solid var(--glass-line);background:var(--glass);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    box-shadow:var(--sh-glass);
    transform:perspective(1200px) rotateY(-6deg) rotateX(2deg);
  }
  .hero-shot img{width:100%;height:290px;object-fit:cover}
  .hero-shot-bar{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    padding:14px 18px;font-size:13px;color:#CBD5E1;
    border-top:1px solid var(--glass-line);background:rgba(6,10,22,.5);
  }
  .hero-shot-bar .mono{color:#8FB0FF}

  /* ---------- Help layout ---------- */
  .help-section{background:var(--bg-light);padding:80px 0}
  .help-layout{display:grid;grid-template-columns:264px minmax(0,1fr);gap:40px;align-items:start}

  .side-nav{
    position:sticky;top:92px;
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    padding:16px;box-shadow:var(--sh-card);
  }
  .side-nav-title{font-size:13px;font-weight:600;color:var(--muted);padding:6px 12px 12px;letter-spacing:.06em}
  .side-nav a{
    display:block;padding:11px 14px;border-radius:10px;font-size:15px;color:#475569;
    border-left:2px solid transparent;transition:background .2s ease,color .2s ease,border-color .2s ease;
  }
  .side-nav a:hover{background:#F1F5F9;color:var(--blue)}
  .side-nav a.is-current{background:rgba(47,107,255,.08);color:var(--blue);font-weight:600;border-left-color:var(--blue)}
  .side-nav-foot{
    margin-top:14px;padding:14px;border-radius:12px;background:#F5F7FB;
    font-size:13px;color:var(--muted);line-height:1.7;
  }

  .help-panel{display:flex;flex-direction:column;gap:40px}
  .faq-group-head{display:flex;align-items:center;gap:12px;margin-bottom:16px}
  .faq-group-head h2{font-size:20px;font-weight:700;color:var(--title)}
  .faq-count{
    font-family:var(--font-mono);font-size:12px;color:var(--blue);
    background:rgba(47,107,255,.10);padding:3px 10px;border-radius:999px;
  }

  .faq-item{
    background:#fff;border:1px solid var(--line);border-radius:16px;margin-bottom:12px;overflow:hidden;
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .faq-item:hover{border-color:rgba(47,107,255,.35);box-shadow:0 10px 30px rgba(15,23,42,.06)}
  .faq-item.is-open{border-color:rgba(47,107,255,.45);box-shadow:0 12px 32px rgba(47,107,255,.10)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 20px;background:none;border:0;text-align:left;cursor:pointer;
    font-size:16px;font-weight:600;color:var(--title);line-height:1.6;
  }
  .faq-icon{
    flex:0 0 26px;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
    background:rgba(47,107,255,.09);color:var(--blue);font-size:17px;line-height:1;
    transition:transform .24s ease,background .24s ease;
  }
  .faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--blue);color:#fff}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
  .faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.9;color:#475569}
  .faq-a-inner strong{color:var(--title)}
  .faq-a-inner ul{margin-top:10px}
  .faq-a-inner li{position:relative;padding-left:18px;margin-top:6px}
  .faq-a-inner li::before{content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;background:var(--cyan)}

  .faq-empty{
    display:none;background:#fff;border:1px dashed var(--line);border-radius:var(--r-card);
    padding:40px 28px;text-align:center;color:var(--muted);
  }
  .faq-empty.is-visible{display:block}
  .faq-empty h3{font-size:17px;font-weight:600;color:var(--title);margin-bottom:8px}

  /* ---------- Troubleshoot steps ---------- */
  .troubleshoot{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    padding:30px 34px;box-shadow:var(--sh-card);
  }
  .troubleshoot h2{font-size:20px;font-weight:700;color:var(--title)}
  .troubleshoot > p{margin-top:10px;font-size:15px;color:var(--muted)}
  .step-row{display:flex;gap:22px;padding:22px 0;border-bottom:1px solid var(--line)}
  .step-row:last-child{border-bottom:0;padding-bottom:0}
  .step-num{
    flex:0 0 54px;font-family:var(--font-mono);font-size:22px;font-weight:700;
    color:var(--blue);line-height:1.3;
  }
  .step-row h3{font-size:16px;font-weight:600;color:var(--title);margin-bottom:6px}
  .step-row p{font-size:15px;color:var(--muted)}

  /* ---------- Contact ---------- */
  .contact-section{background:var(--bg-light);padding:0 0 80px}
  .contact-card{
    display:grid;grid-template-columns:1fr 1.15fr;gap:40px;
    background:#fff;border:1px solid var(--line);border-radius:20px;
    padding:38px;box-shadow:var(--sh-card);
  }
  .contact-card h2{font-size:24px;font-weight:700;color:var(--title);line-height:1.35}
  .contact-card > div > p{margin-top:14px;font-size:15px;color:var(--muted)}
  .contact-points{margin-top:22px;display:flex;flex-direction:column;gap:12px}
  .contact-points li{
    display:flex;gap:10px;align-items:flex-start;font-size:14px;color:#475569;
    padding:12px 14px;border-radius:12px;background:#F5F7FB;border:1px solid #E8EEF7;
  }
  .contact-points li span.k{font-family:var(--font-mono);color:var(--blue);font-weight:600}

  .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
  .field{display:flex;flex-direction:column}
  .field.full{grid-column:1 / -1}
  .field label{font-size:13px;font-weight:600;color:#334155;margin-bottom:8px}
  .field input,.field select,.field textarea{
    width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;
    font-size:15px;color:var(--title);background:#fff;
    transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
  }
  .field input:hover,.field select:hover,.field textarea:hover{border-color:rgba(47,107,255,.4)}
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,107,255,.16);background:#fff;
  }
  .field textarea{min-height:118px;resize:vertical;line-height:1.75}
  .field-hint{font-size:12px;color:var(--muted);margin-top:6px}
  .form-actions{grid-column:1 / -1;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
  .form-note{font-size:13px;color:var(--muted)}
  .form-status{
    display:none;grid-column:1 / -1;font-size:14px;color:#0f8a5f;
    background:rgba(52,211,153,.12);border:1px solid rgba(52,211,153,.35);
    border-radius:12px;padding:12px 16px;
  }
  .form-status.is-visible{display:block}

  /* ---------- Link cards ---------- */
  .links-section{padding:80px 0;background:#fff}
  .link-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
  .link-card{
    display:flex;flex-direction:column;overflow:hidden;background:#fff;
    border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);
    transition:transform .2s cubic-bezier(.2,.8,.2,1),box-shadow .22s ease,border-color .22s ease;
  }
  .link-card:hover{transform:translateY(-4px);border-color:rgba(47,107,255,.35);box-shadow:0 16px 40px rgba(15,23,42,.13)}
  .link-card img{width:100%;height:180px;object-fit:cover}
  .link-card-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
  .link-card-body h3{font-size:18px;font-weight:600;color:var(--title);margin:12px 0 10px}
  .link-card-body p{font-size:14px;color:var(--muted);flex:1}
  .link-more{margin-top:16px;font-size:14px;font-weight:600;color:var(--blue);display:inline-flex;align-items:center;gap:6px}
  .link-card:hover .link-more{gap:10px}

  /* ---------- CTA band ---------- */
  .cta-band{background:var(--ink-900);color:#fff;padding:56px 0;position:relative;overflow:hidden}
  .cta-band::before{
    content:"";position:absolute;inset:0;
    background:radial-gradient(600px 220px at 12% 0%,rgba(47,107,255,.28),transparent 70%),
               radial-gradient(520px 200px at 92% 100%,rgba(34,211,238,.18),transparent 70%);
  }
  .cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
  .cta-inner h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.35}
  .cta-inner p{margin-top:10px;font-size:15px;color:#94A3B8;max-width:640px}

  /* ---------- Footer ---------- */
  .site-footer{background:#060A16;color:#94A3B8;padding:64px 0 28px}
  .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
  .footer-brand .brand-text{color:#fff;font-size:17px;font-weight:700}
  .footer-about{font-size:14px;line-height:1.85;color:#94A3B8;max-width:380px}
  .footer-social{display:flex;gap:10px;margin-top:20px}
  .footer-social span{
    width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
    font-size:13px;color:#CBD5E1;background:rgba(255,255,255,.05);
    border:1px solid rgba(148,190,255,.18);
  }
  .footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
  .footer-col ul{display:flex;flex-direction:column;gap:10px}
  .footer-col a,.footer-col span{font-size:14px;color:#94A3B8;transition:color .2s ease}
  .footer-col a:hover{color:#fff}
  .footer-col .mono{font-size:13px;color:#A9C3FF}
  .footer-bottom{
    margin-top:44px;padding-top:22px;border-top:1px solid rgba(148,190,255,.12);
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:#64748B;
  }

  /* ---------- Responsive ---------- */
  @media (max-width:1023px){
    .nav-center{display:none}
    .search-box{display:none}
    .nav-toggle{display:inline-flex}
    .header-inner{height:60px}
    .mobile-drawer{top:60px}
    .page-hero-inner{grid-template-columns:1fr;gap:34px;padding:56px 0 60px}
    .hero-shot{transform:none}
    .hero-shot img{height:240px}
    .help-section{padding:64px 0}
    .help-layout{grid-template-columns:1fr;gap:26px}
    .side-nav{position:static;display:flex;gap:8px;overflow-x:auto;padding:10px;border-radius:14px;scrollbar-width:none}
    .side-nav::-webkit-scrollbar{display:none}
    .side-nav-title,.side-nav-foot{display:none}
    .side-nav a{white-space:nowrap;border-left:0;border-bottom:2px solid transparent;padding:9px 14px}
    .side-nav a.is-current{border-left:0;border-bottom-color:var(--blue)}
    .contact-card{grid-template-columns:1fr;padding:28px}
    .link-cards{grid-template-columns:repeat(2,minmax(0,1fr))}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
    .section{padding:64px 0}
  }
  @media (max-width:767px){
    .section,.help-section,.links-section{padding:48px 0}
    .contact-section{padding:0 0 56px}
    .page-hero-inner{padding:44px 0 48px}
    .hero-search{flex-direction:column;align-items:stretch;border-radius:20px;padding:12px}
    .hero-search input{padding:6px 8px}
    .form-grid{grid-template-columns:1fr}
    .link-cards{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr}
    .troubleshoot{padding:22px 20px}
    .step-row{gap:14px}
    .step-num{flex:0 0 40px;font-size:19px}
    .faq-q{padding:16px;font-size:15px}
    .faq-a-inner{padding:0 16px 18px}
    .cta-band{padding:44px 0}
  }