/* roulang page: index */
:root{
  --ink-950:#05080F; --ink-900:#0A111D; --ink-850:#0D1524;
  --brand-400:#5BF0DA; --brand-500:#2BE3C8; --brand-600:#12B9A2;
  --accent-500:#6C5CE7; --warm-400:#FFB65C;
  --t-main:#EAF2FF; --t-sub:#9FB0C9; --t-weak:#6B7C95;
  --line:rgba(255,255,255,.08);
  --glass:rgba(16,26,44,.62);
  --r-card:16px; --r-lg:24px; --r-btn:12px; --r-img:14px;
  --sh-card:0 18px 50px rgba(0,0,0,.45);
  --sh-glow:0 10px 30px -8px rgba(43,227,200,.55);
  --ease:cubic-bezier(.22,.8,.28,1);
  --side-w:248px;
  --sec-y:56px;
}
@media (min-width:768px){ :root{ --sec-y:72px; } }
@media (min-width:1280px){ :root{ --sec-y:96px; --side-w:248px; } }

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background-color:var(--ink-950);
  background-image:
    radial-gradient(58% 44% at 10% 2%, rgba(43,227,200,.14), transparent 70%),
    radial-gradient(48% 40% at 92% 94%, rgba(108,92,231,.16), transparent 72%);
  background-attachment:fixed;
  color:var(--t-main);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
button{ font-family:inherit; }
input,select,textarea{ font-family:inherit; font-size:15px; }
:focus-visible{ outline:2px solid var(--brand-500); outline-offset:2px; border-radius:4px; }
.num,.stat-num,.fc-num{ font-variant-numeric:tabular-nums; font-family:Inter,system-ui,sans-serif; }

/* ============ 布局骨架 ============ */
.app{ position:relative; min-height:100vh; }
.main-wrap{ margin-left:0; }
@media (min-width:1024px){ .main-wrap{ margin-left:76px; } }
@media (min-width:1280px){ .main-wrap{ margin-left:var(--side-w); } }

.container{ width:100%; max-width:1280px; margin:0 auto; padding:0 20px; }
@media (min-width:768px){ .container{ padding:0 32px; } }
@media (min-width:1280px){ .container{ padding:0 48px; } }

.section{ padding:var(--sec-y) 0; }
.sec-head{ margin-bottom:28px; max-width:760px; }
@media (min-width:768px){ .sec-head{ margin-bottom:32px; } }
.sec-head h2{
  margin:0 0 12px;
  font-size:clamp(26px,2.6vw,36px);
  font-weight:700;
  line-height:1.3;
  letter-spacing:-.005em;
}
.sec-head p{ margin:0; color:var(--t-sub); font-size:16px; line-height:1.85; }
.sec-head-row{ display:flex; align-items:flex-end; justify-content:space-between; gap:20px; max-width:none; }
.text-link{
  color:var(--brand-500); font-weight:600; font-size:15px; white-space:nowrap;
  border-bottom:1px solid rgba(43,227,200,.35); padding-bottom:2px;
  transition:color .2s var(--ease), border-color .2s var(--ease);
}
.text-link:hover{ color:var(--brand-400); border-color:var(--brand-400); }

/* ============ 侧栏 App Shell ============ */
.sidebar{
  position:fixed; left:0; top:0; bottom:0; width:248px; z-index:60;
  display:flex; flex-direction:column;
  padding:24px 16px 18px;
  background:rgba(10,17,29,.86);
  backdrop-filter:blur(16px);
  border-right:1px solid var(--line);
}
.side-brand{
  display:flex; align-items:center; gap:12px; padding:6px 8px 22px;
}
.brand-mark{
  flex:none; width:38px; height:38px; border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  background:linear-gradient(145deg, rgba(43,227,200,.9), rgba(108,92,231,.85));
  box-shadow:0 8px 22px -10px rgba(43,227,200,.85);
  color:#04231F;
}
.brand-mark svg{ width:20px; height:20px; }
.side-brand-text{ font-size:16px; font-weight:700; letter-spacing:.02em; color:var(--t-main); }
.side-nav{ display:flex; flex-direction:column; gap:4px; }
.side-link{
  position:relative; display:flex; align-items:center; gap:12px;
  padding:11px 12px; border-radius:12px;
  color:var(--t-sub); font-size:15px; font-weight:600;
  transition:background .2s var(--ease), color .2s var(--ease);
}
.side-link svg{ width:20px; height:20px; flex:none; }
.side-link:hover{ background:rgba(255,255,255,.05); color:var(--t-main); }
.side-link.active{ background:rgba(43,227,200,.10); color:var(--brand-400); }
.side-link.active::before{
  content:""; position:absolute; left:0; top:10px; bottom:10px; width:3px;
  border-radius:0 3px 3px 0; background:var(--brand-500);
  box-shadow:0 0 12px rgba(43,227,200,.9);
}
.side-sep{ height:1px; background:var(--line); margin:18px 8px; }
.side-card{
  background:var(--glass); border:1px solid var(--line); border-radius:14px;
  padding:16px; position:relative; overflow:hidden;
}
.side-card::before{
  content:""; position:absolute; inset:0 0 auto 0; height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);
}
.side-card p{ margin:0 0 12px; font-size:13px; line-height:1.7; color:var(--t-sub); }
.side-foot{ margin-top:auto; display:flex; flex-direction:column; gap:8px; padding:14px 8px 0; }
.side-foot a{ font-size:13px; color:var(--t-weak); transition:color .2s var(--ease); }
.side-foot a:hover{ color:var(--brand-500); }
.side-foot span{ font-size:12px; color:var(--t-weak); }

@media (max-width:1279px){
  .sidebar{ width:76px; padding:20px 12px 16px; align-items:center; }
  .side-brand{ padding:6px 0 20px; justify-content:center; }
  .side-brand-text{ display:none; }
  .side-nav{ width:100%; align-items:center; }
  .side-link{ justify-content:center; padding:12px 0; width:100%; }
  .side-link .side-label{ display:none; }
  .side-card{ display:none; }
  .side-sep{ width:100%; margin:16px 0; }
  .side-foot{ align-items:center; padding:12px 0 0; }
  .side-foot span{ display:none; }
  .side-link::after{
    content:attr(data-tip);
    position:absolute; left:calc(100% + 12px); top:50%; transform:translateY(-50%);
    background:rgba(16,26,44,.95); border:1px solid var(--line); color:var(--t-main);
    font-size:13px; font-weight:600; padding:6px 12px; border-radius:10px;
    white-space:nowrap; opacity:0; pointer-events:none; transition:opacity .18s var(--ease);
    z-index:80;
  }
  .side-link:hover::after{ opacity:1; }
}
@media (max-width:1023px){ .sidebar{ display:none; } }

/* 移动端顶部栏 */
.mobile-bar{
  display:none; position:sticky; top:0; z-index:55;
  height:64px; align-items:center; gap:12px;
  padding:0 16px;
  background:rgba(10,17,29,.82);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .25s var(--ease), box-shadow .25s var(--ease);
}
.mobile-bar.scrolled{ background:rgba(5,8,15,.95); box-shadow:0 10px 30px rgba(0,0,0,.45); }
@media (max-width:1023px){ .mobile-bar{ display:flex; } }
.mobile-brand{
  flex:1; text-align:center; font-size:15.5px; font-weight:700; letter-spacing:.02em;
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
}
.icon-btn{
  width:44px; height:44px; min-width:44px; display:inline-flex; align-items:center; justify-content:center;
  border-radius:12px; border:1px solid var(--line); background:rgba(255,255,255,.04);
  color:var(--t-main); cursor:pointer; transition:background .2s var(--ease), border-color .2s var(--ease);
}
.icon-btn:hover{ background:rgba(255,255,255,.08); border-color:rgba(43,227,200,.4); }
.icon-btn svg{ width:20px; height:20px; }

/* 抽屉 */
.drawer-mask{
  position:fixed; inset:0; z-index:70; background:rgba(3,6,12,.7);
  backdrop-filter:blur(8px); opacity:0; transition:opacity .25s var(--ease);
}
.drawer-mask.show{ opacity:1; }
.drawer{
  position:fixed; top:0; right:0; bottom:0; width:300px; max-width:88vw; z-index:71;
  display:flex; flex-direction:column; padding:20px 18px;
  background:rgba(10,17,29,.94); backdrop-filter:blur(16px);
  border-left:1px solid var(--line);
  transform:translateX(102%); transition:transform .28s var(--ease);
}
.drawer.open{ transform:translateX(0); }
.drawer-head{ display:flex; align-items:center; justify-content:space-between; gap:12px; padding-bottom:18px; }
.drawer-head strong{ font-size:15.5px; font-weight:700; letter-spacing:.02em; }
.drawer-nav{ display:flex; flex-direction:column; gap:6px; }
.drawer-nav .side-link{ font-size:15.5px; padding:13px 14px; }
.drawer-foot{ margin-top:auto; padding-top:18px; border-top:1px solid var(--line); }

/* ============ 通用组件 ============ */
.glass{
  position:relative; background:var(--glass);
  backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line); border-radius:var(--r-card);
  box-shadow:var(--sh-card);
}
.glass::before{
  content:""; position:absolute; inset:0 0 auto 0; height:1px; pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);
}
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  min-height:46px; padding:13px 24px; border-radius:var(--r-btn);
  font-size:15px; font-weight:700; letter-spacing:.01em;
  border:1px solid transparent; cursor:pointer;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}
.btn-primary{
  background:linear-gradient(180deg,var(--brand-400),var(--brand-500));
  color:#04231F; box-shadow:var(--sh-glow);
}
.btn-primary:hover{
  background:linear-gradient(180deg,#7BF5E3,var(--brand-400));
  transform:translateY(-1px);
  box-shadow:0 14px 40px -6px rgba(43,227,200,.70);
}
.btn-primary:active{ transform:translateY(1px); box-shadow:0 6px 18px -10px rgba(43,227,200,.6); }
.btn-ghost{ background:transparent; border-color:rgba(43,227,200,.4); color:var(--brand-500); }
.btn-ghost:hover{ background:rgba(43,227,200,.08); border-color:var(--brand-500); transform:translateY(-1px); }
.btn-sm{ min-height:40px; padding:9px 16px; font-size:14px; }
.btn-xs{ min-height:36px; padding:7px 13px; font-size:13px; }
.btn-block{ width:100%; }
.badge{
  display:inline-flex; align-items:center; gap:6px;
  padding:5px 13px; border-radius:999px;
  font-size:12.5px; font-weight:600; letter-spacing:.02em;
  background:rgba(43,227,200,.12); color:var(--brand-400);
  border:1px solid rgba(43,227,200,.28);
}
.badge-accent{ background:rgba(108,92,231,.16); color:#B9B0FF; border-color:rgba(108,92,231,.35); }
.badge-warm{ background:rgba(255,182,92,.12); color:var(--warm-400); border-color:rgba(255,182,92,.3); }

/* 进场 */
.js .reveal{ opacity:0; transform:translateY(12px); transition:opacity .38s var(--ease), transform .38s var(--ease); }
.js .reveal.in{ opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  .js .reveal{ opacity:1; transform:none; transition:none; }
  *,*::before,*::after{ transition-duration:.01ms !important; animation-duration:.01ms !important; }
}

/* ============ Hero ============ */
.hero{ padding-top:40px; padding-bottom:8px; }
.hero-grid{
  display:grid; grid-template-columns:1fr; gap:40px; align-items:center;
  padding-top:16px; padding-bottom:24px;
}
@media (min-width:1024px){
  .hero-grid{ grid-template-columns:7fr 5fr; gap:56px; padding-top:44px; padding-bottom:40px; }
}
.hero-left h1{
  margin:18px 0 18px;
  font-size:clamp(32px,4.4vw,54px);
  line-height:1.18; font-weight:800; letter-spacing:-.01em;
}
.hero-sub{ margin:0 0 26px; color:var(--t-sub); font-size:16.5px; line-height:1.85; max-width:600px; }
.hero-cta{ display:flex; flex-wrap:wrap; gap:12px; margin-bottom:28px; }
.trust{ list-style:none; display:flex; flex-wrap:wrap; gap:10px 22px; margin:0; padding:0; }
.trust li{ display:flex; align-items:center; gap:8px; font-size:13.5px; color:var(--t-sub); }
.trust svg{ width:16px; height:16px; color:var(--brand-500); flex:none; }

.hero-visual{ position:relative; padding:10px 0 26px; }
.hero-figure{
  margin:0; position:relative; overflow:hidden;
  border-radius:var(--r-img); border:1px solid var(--line);
  box-shadow:var(--sh-card); aspect-ratio:16/10;
  background:linear-gradient(140deg,rgba(16,26,44,.95),rgba(10,17,29,.95));
}
.hero-figure img{ width:100%; height:100%; object-fit:cover; }
.hero-fade{
  position:absolute; inset:auto 0 0 0; height:58%;
  background:linear-gradient(180deg,transparent,rgba(5,8,15,.9));
}
.float-card{
  position:absolute; width:196px; padding:14px 16px; border-radius:14px;
  background:rgba(16,26,44,.74); backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.1);
  box-shadow:0 18px 40px rgba(0,0,0,.5);
}
.float-card::before{
  content:""; position:absolute; inset:0 0 auto 0; height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);
}
.fc-a{ left:-12px; bottom:44px; }
.fc-b{ right:-12px; top:20px; }
.fc-label{ display:block; font-size:12px; color:var(--t-weak); letter-spacing:.04em; }
.fc-num{ display:block; font-size:26px; font-weight:800; color:var(--warm-400); line-height:1.3; }
.fc-num span{ font-size:13px; font-weight:600; color:var(--t-sub); margin-left:2px; }
.fc-note{ display:block; font-size:12px; color:var(--t-weak); line-height:1.6; }
@media (max-width:639px){
  .float-card{ width:150px; padding:10px 12px; }
  .fc-num{ font-size:21px; }
  .fc-a{ left:-6px; bottom:14px; }
}
@media (max-width:519px){ .fc-b{ display:none; } }

/* ============ 痛点提问 ============ */
.pain-grid{ display:grid; grid-template-columns:1fr; gap:20px; }
@media (min-width:768px){ .pain-grid{ grid-template-columns:repeat(3,1fr); align-items:start; } }
.pain-card{
  position:relative; overflow:hidden; padding:26px 24px 24px;
  background:var(--glass); border:1px solid var(--line); border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  transition:transform .22s var(--ease), border-color .22s var(--ease);
}
.pain-card:hover{ transform:translateY(-3px); border-color:rgba(43,227,200,.35); }
.pain-card h3{ position:relative; z-index:1; margin:0 0 12px; font-size:18px; font-weight:600; line-height:1.6; }
.pain-card p{ position:relative; z-index:1; margin:0; font-size:14px; color:var(--t-sub); line-height:1.75; }
.pain-num{
  position:absolute; right:14px; top:-6px;
  font-family:Inter,system-ui,sans-serif; font-size:76px; font-weight:800;
  color:rgba(255,255,255,.045); letter-spacing:-.04em; line-height:1;
  pointer-events:none;
}
.pain-card.p1{ min-height:auto; }
@media (min-width:768px){
  .pain-card.p1{ margin-top:0; }
  .pain-card.p2{ margin-top:38px; padding-bottom:40px; }
  .pain-card.p3{ margin-top:14px; padding-bottom:30px; }
}

/* ============ 方案卡片 ============ */
.plan-grid{ display:grid; grid-template-columns:1fr; gap:20px; }
@media (min-width:1024px){ .plan-grid{ grid-template-columns:7fr 5fr; align-items:stretch; } }
.plan-main{
  position:relative; overflow:hidden; border-radius:var(--r-lg);
  background:var(--glass); border:1px solid var(--line); box-shadow:var(--sh-card);
  display:flex; flex-direction:column;
  transition:border-color .22s var(--ease);
}
.plan-main:hover{ border-color:rgba(43,227,200,.3); }
.plan-main::before{
  content:""; position:absolute; inset:0 0 auto 0; height:2px; z-index:2;
  background:linear-gradient(90deg,var(--brand-500),var(--accent-500),transparent);
}
.plan-cover{ position:relative; aspect-ratio:16/9; overflow:hidden; background:rgba(13,21,36,.9); }
.plan-cover img{ width:100%; height:100%; object-fit:cover; }
.plan-cover::after{
  content:""; position:absolute; inset:auto 0 0 0; height:50%;
  background:linear-gradient(180deg,transparent,rgba(5,8,15,.92));
}
.plan-tag{ position:absolute; left:20px; bottom:18px; z-index:3; }
.plan-body{ padding:26px 26px 28px; display:flex; flex-direction:column; gap:16px; flex:1; }
.plan-body h3{ margin:0; font-size:21px; font-weight:700; }
.plan-points{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:11px; }
.plan-points li{ position:relative; padding-left:24px; font-size:15px; color:var(--t-sub); line-height:1.75; }
.plan-points li::before{
  content:""; position:absolute; left:2px; top:9px; width:8px; height:8px; border-radius:3px;
  background:var(--brand-500); box-shadow:0 0 10px rgba(43,227,200,.7);
}
.plan-body .btn{ align-self:flex-start; margin-top:4px; }
.plan-side{ display:grid; gap:20px; }
.plan-card{
  position:relative; overflow:hidden; padding:24px;
  background:var(--glass); border:1px solid var(--line); border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  display:flex; flex-direction:column; gap:12px;
  transition:transform .22s var(--ease), border-color .22s var(--ease);
}
.plan-card:hover{ transform:translateY(-3px); border-color:rgba(108,92,231,.45); }
.plan-card::before{
  content:""; position:absolute; inset:0 0 auto 0; height:1px;
  background:linear-gradient(90deg,rgba(108,92,231,.85),transparent);
}
.plan-card .corner{
  position:absolute; right:16px; top:16px;
  font-size:11.5px; letter-spacing:.06em; color:var(--t-weak);
}
.plan-card h3{ margin:0; font-size:18px; font-weight:700; }
.plan-card p{ margin:0; font-size:14.5px; color:var(--t-sub); line-height:1.8; }
.plan-card .text-link{ align-self:flex-start; font-size:14px; }

/* ============ 数据区 ============ */
.stats-wrap{
  position:relative; overflow:hidden;
  background:linear-gradient(180deg,rgba(13,21,36,.85),rgba(10,17,29,.6));
  border:1px solid var(--line); border-radius:var(--r-lg);
  box-shadow:var(--sh-card);
}
.stats{ display:grid; grid-template-columns:repeat(2,1fr); }
@media (min-width:1024px){ .stats{ grid-template-columns:repeat(4,1fr); } }
.stat{ padding:26px 20px; text-align:center; border-bottom:1px solid var(--line); }
.stat:nth-child(2n){ border-right:none; }
.stat:nth-child(odd){ border-right:1px solid var(--line); }
@media (min-width:1024px){
  .stat{ border-bottom:none; border-right:1px solid var(--line); }
  .stat:nth-child(odd){ border-right:1px solid var(--line); }
  .stat:last-child{ border-right:none; }
}
@media (max-width:1023px){
  .stat:nth-child(3),.stat:nth-child(4){ border-bottom:none; }
}
.stat-num{
  display:block; font-size:40px; font-weight:800; line-height:1.25;
  color:var(--brand-400); letter-spacing:-.02em;
}
.stat-num em{ font-style:normal; font-size:15px; font-weight:600; color:var(--t-sub); margin-left:4px; }
.stat p{ margin:8px 0 0; font-size:14px; color:var(--t-sub); line-height:1.7; }
.stats-note{
  margin:0; padding:16px 24px 20px; font-size:12px; color:var(--t-weak);
  border-top:1px solid var(--line); line-height:1.7;
}

/* ============ 表单 ============ */
.form-shell{ max-width:720px; margin:0 auto; }
.form-card{ padding:28px 24px 26px; }
@media (min-width:768px){ .form-card{ padding:34px 34px 32px; } }
.form-card h2{ margin:0 0 8px; font-size:clamp(22px,2.2vw,28px); font-weight:700; }
.form-card > p.form-intro{ margin:0 0 24px; color:var(--t-sub); font-size:15px; line-height:1.8; }
.lead-form{ display:grid; grid-template-columns:1fr; gap:16px; }
@media (min-width:768px){
  .lead-form{ grid-template-columns:1fr 1fr; }
  .lead-form .field-full{ grid-column:1 / -1; }
}
.field{ display:flex; flex-direction:column; gap:7px; }
.field label{ font-size:13.5px; font-weight:600; color:var(--t-sub); }
.field input,.field select,.field textarea{
  width:100%; min-height:46px; padding:11px 14px;
  background:rgba(5,8,15,.55); color:var(--t-main);
  border:1px solid var(--line); border-radius:var(--r-btn);
  transition:border-color .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease);
}
.field textarea{ min-height:110px; resize:vertical; line-height:1.75; }
.field input::placeholder,.field textarea::placeholder{ color:var(--t-weak); }
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none; border-color:var(--brand-500); background:rgba(5,8,15,.8);
  box-shadow:0 0 0 3px rgba(43,227,200,.14);
}
.field.error input,.field.error select,.field.error textarea{ border-color:#F87171; }
.err{ margin:0; font-size:12px; color:#F87171; min-height:0; display:none; }
.field.error .err{ display:block; }
.check{ display:flex; align-items:flex-start; gap:10px; font-size:13.5px; color:var(--t-sub); line-height:1.7; }
.check input{ width:18px; height:18px; min-height:18px; margin-top:4px; accent-color:var(--brand-500); flex:none; }
.check.error{ color:#F87171; }
.form-success{
  display:flex; flex-direction:column; align-items:flex-start; gap:12px;
  padding:26px 24px; border-radius:var(--r-card);
  background:rgba(52,211,153,.08); border:1px solid rgba(52,211,153,.35);
}
.form-success svg{ width:34px; height:34px; color:#34D399; }
.form-success strong{ font-size:18px; font-weight:700; }
.form-success p{ margin:0; font-size:14.5px; color:var(--t-sub); line-height:1.8; }
.privacy-note{
  max-width:720px; margin:14px auto 0;
  font-size:12px; color:var(--t-weak); line-height:1.75;
}
.privacy-note a{ color:var(--t-sub); border-bottom:1px solid rgba(255,255,255,.14); }
.privacy-note a:hover{ color:var(--brand-500); border-color:rgba(43,227,200,.5); }

/* ============ 资讯列表 ============ */
.news-grid{ display:grid; grid-template-columns:1fr; gap:20px; }
@media (min-width:640px){ .news-grid{ grid-template-columns:repeat(2,1fr); } }
@media (min-width:1024px){ .news-grid{ grid-template-columns:repeat(3,1fr); } }
.news-card{
  position:relative; overflow:hidden; display:flex; flex-direction:column;
  background:var(--glass); border:1px solid var(--line); border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  transition:transform .22s var(--ease), border-color .22s var(--ease);
}
.news-card:hover{ transform:translateY(-3px); border-color:rgba(43,227,200,.32); }
.news-cover{ display:block; aspect-ratio:16/9; overflow:hidden; background:rgba(13,21,36,.9); }
.news-cover img{ width:100%; height:100%; object-fit:cover; transition:transform .35s var(--ease); }
.news-card:hover .news-cover img{ transform:scale(1.03); }
.news-body{ padding:20px; display:flex; flex-direction:column; gap:10px; flex:1; }
.news-body .badge{ align-self:flex-start; }
.news-title{ margin:0; font-size:17px; font-weight:700; line-height:1.6; }
.news-title a{ transition:color .2s var(--ease); }
.news-title a:hover{ color:var(--brand-400); }
.news-title{
  display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden;
}
.news-excerpt{
  margin:0; font-size:14px; color:var(--t-sub); line-height:1.8;
  display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden;
}
.news-meta{
  margin-top:auto; padding-top:12px; border-top:1px solid var(--line);
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  font-size:12.5px; color:var(--t-weak);
}
.read-link{ color:var(--brand-500); font-weight:600; font-size:13px; }
.read-link:hover{ color:var(--brand-400); }
@media (min-width:1024px){
  .news-lead{ grid-column:span 2; flex-direction:row; }
  .news-lead .news-cover{ width:52%; aspect-ratio:16/10; }
  .news-lead .news-body{ width:48%; padding:26px; }
  .news-lead .news-title{ font-size:20px; -webkit-line-clamp:3; }
  .news-lead .news-excerpt{ -webkit-line-clamp:4; }
}
.empty-state{
  padding:44px 28px; text-align:center;
  display:flex; flex-direction:column; align-items:center; gap:12px;
}
.empty-state svg{ width:42px; height:42px; color:var(--brand-500); opacity:.75; }
.empty-state .empty-title{ margin:0; font-size:16.5px; font-weight:700; }
.empty-state .empty-sub{ margin:0; font-size:14px; color:var(--t-sub); line-height:1.8; max-width:520px; }

/* ============ FAQ ============ */
.faq{ max-width:820px; margin:0 auto; }
.faq details{
  position:relative; margin-bottom:12px; overflow:hidden;
  background:rgba(16,26,44,.5); border:1px solid var(--line); border-radius:14px;
  transition:border-color .22s var(--ease), background .22s var(--ease);
}
.faq details:hover{ border-color:rgba(255,255,255,.16); }
.faq details[open]{ border-color:rgba(43,227,200,.35); background:rgba(16,26,44,.68); }
.faq details[open]::before{
  content:""; position:absolute; left:0; top:14px; bottom:14px; width:3px;
  border-radius:0 3px 3px 0; background:var(--brand-500); box-shadow:0 0 12px rgba(43,227,200,.8);
}
.faq summary{
  list-style:none; cursor:pointer; position:relative;
  padding:18px 56px 18px 22px; font-size:17px; font-weight:600; line-height:1.65;
}
.faq summary::-webkit-details-marker{ display:none; }
.faq summary::after{
  content:""; position:absolute; right:24px; top:50%;
  width:9px; height:9px;
  border-right:2px solid var(--brand-500); border-bottom:2px solid var(--brand-500);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .25s var(--ease);
}
.faq details[open] summary::after{ transform:translateY(-30%) rotate(-135deg); }
.faq .faq-a{ padding:0 22px 20px; font-size:15px; color:var(--t-sub); line-height:1.8; }
.faq .faq-a p{ margin:0 0 10px; }
.faq .faq-a p:last-child{ margin-bottom:0; }

/* ============ 页脚 CTA 条 + 页脚 ============ */
.foot-cta-wrap{ padding:0 0 var(--sec-y); }
.foot-cta{
  display:flex; flex-direction:column; gap:18px; align-items:flex-start;
  padding:24px 26px;
  background:linear-gradient(90deg,rgba(43,227,200,.10),rgba(108,92,231,.10));
  border:1px solid var(--line); border-radius:var(--r-lg);
  backdrop-filter:blur(14px);
}
@media (min-width:768px){
  .foot-cta{ flex-direction:row; align-items:center; justify-content:space-between; padding:26px 34px; }
}
.foot-cta p{ margin:0; font-size:18px; font-weight:700; line-height:1.6; }
.site-foot{ border-top:1px solid var(--line); background:rgba(5,8,15,.6); }
.foot-grid{
  display:grid; grid-template-columns:1fr; gap:26px;
  padding:44px 0 30px;
}
@media (min-width:768px){ .foot-grid{ grid-template-columns:1.4fr 1fr; align-items:start; } }
.foot-brand{ display:flex; flex-direction:column; gap:12px; }
.foot-brand-row{ display:flex; align-items:center; gap:12px; }
.foot-brand-row strong{ font-size:16px; font-weight:700; letter-spacing:.02em; }
.foot-brand p{ margin:0; font-size:14px; color:var(--t-sub); line-height:1.8; max-width:440px; }
.foot-links{ display:flex; flex-wrap:wrap; gap:10px 26px; }
.foot-links a{ font-size:14px; color:var(--t-sub); transition:color .2s var(--ease); }
.foot-links a:hover{ color:var(--brand-500); }
.foot-bottom{
  display:flex; flex-wrap:wrap; gap:8px 18px; align-items:center; justify-content:space-between;
  padding:16px 0 30px; border-top:1px solid var(--line);
  font-size:12.5px; color:var(--t-weak);
}

/* ============ 悬浮按钮 + 模态 ============ */
.fab{
  position:fixed; right:20px; bottom:22px; z-index:58;
  display:inline-flex; align-items:center; gap:9px;
  min-height:48px; padding:12px 20px; border-radius:999px;
  background:linear-gradient(180deg,var(--brand-400),var(--brand-500));
  color:#04231F; font-size:14.5px; font-weight:700; border:none; cursor:pointer;
  box-shadow:0 14px 34px -10px rgba(43,227,200,.75);
  transition:transform .2s var(--ease), box-shadow .2s var(--ease);
}
.fab:hover{ transform:translateY(-2px); box-shadow:0 18px 44px -8px rgba(43,227,200,.85); }
.fab svg{ width:18px; height:18px; }
@media (min-width:1024px){ .fab{ right:28px; bottom:28px; } }
.modal-mask{
  position:fixed; inset:0; z-index:90;
  display:flex; align-items:center; justify-content:center; padding:20px;
  background:rgba(3,6,12,.72); backdrop-filter:blur(8px);
  opacity:0; transition:opacity .24s var(--ease);
}
.modal-mask.show{ opacity:1; }
.modal{
  position:relative; width:100%; max-width:560px; max-height:88vh; overflow:auto;
  padding:28px 24px 26px; border-radius:var(--r-lg);
  background:rgba(10,17,29,.94); backdrop-filter:blur(18px);
  border:1px solid var(--line); box-shadow:0 30px 80px rgba(0,0,0,.6);
  transform:translateY(12px) scale(.985); transition:transform .26s var(--ease);
}
.modal-mask.show .modal{ transform:none; }
.modal::before{
  content:""; position:absolute; inset:0 0 auto 0; height:2px;
  background:linear-gradient(90deg,var(--brand-500),var(--accent-500),transparent);
  border-radius:var(--r-lg) var(--r-lg) 0 0;
}
.modal h3{ margin:0 0 8px; font-size:21px; font-weight:700; }
.modal > p{ margin:0 0 20px; font-size:14.5px; color:var(--t-sub); line-height:1.8; }
.modal-close{
  position:absolute; right:14px; top:14px;
  width:44px; height:44px; display:inline-flex; align-items:center; justify-content:center;
  border-radius:12px; border:1px solid var(--line); background:rgba(255,255,255,.04);
  color:var(--t-main); cursor:pointer; transition:background .2s var(--ease);
}
.modal-close:hover{ background:rgba(255,255,255,.1); }
.modal-close svg{ width:18px; height:18px; }
@media (max-width:639px){
  .modal-mask{ align-items:flex-end; padding:0; }
  .modal{ max-width:none; max-height:88vh; border-radius:20px 20px 0 0; padding:24px 20px 28px; }
}
body.no-scroll{ overflow:hidden; }

/* roulang page: category1 */
:root{
  --ink-950:#05080F;
  --ink-900:#0A111D;
  --ink-850:#0D1524;
  --card-bg:rgba(16,26,44,.62);
  --brand-500:#2BE3C8;
  --brand-400:#5BF0DA;
  --brand-600:#12B9A2;
  --accent-500:#6C5CE7;
  --warm-400:#FFB65C;
  --text:#EAF2FF;
  --text-2:#9FB0C9;
  --text-3:#6B7C95;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --ok:#34D399;
  --warn:#F59E0B;
  --err:#F87171;
  --r-card:16px;
  --r-block:24px;
  --r-btn:12px;
  --r-input:12px;
  --r-img:14px;
  --shadow-card:0 18px 50px rgba(0,0,0,.45);
  --shadow-glow:0 10px 30px -8px rgba(43,227,200,.55);
  --shadow-glow-hi:0 14px 40px -6px rgba(43,227,200,.70);
  --ease:cubic-bezier(.22,.8,.28,1);
  --sidebar-w:248px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-950);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(45% 45% at 12% 6%,rgba(43,227,200,.16),transparent 62%),
    radial-gradient(30% 30% at 88% 88%,rgba(108,92,231,.18),transparent 66%);
}
h1,h2,h3,h4{margin:0;line-height:1.28;font-weight:800;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.skip-link{position:absolute;left:-9999px;top:0;z-index:200;background:var(--brand-500);color:#04120F;padding:10px 16px;border-radius:0 0 12px 0;font-weight:700}
.skip-link:focus{left:0}

/* 侧栏 */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  display:flex;flex-direction:column;gap:16px;
  padding:22px 16px 18px;
  background:rgba(10,17,29,.88);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-right:1px solid var(--line);
  z-index:60;
  overflow-y:auto;
}
.side-logo{display:flex;align-items:center;gap:11px;padding:4px 8px 16px;border-bottom:1px solid var(--line)}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;
  border-radius:11px;
  background:linear-gradient(145deg,rgba(43,227,200,.22),rgba(108,92,231,.24));
  border:1px solid rgba(43,227,200,.35);
  color:var(--brand-400);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.16);
}
.brand-mark svg{width:18px;height:18px}
.side-logo-text{font-size:16px;font-weight:700;letter-spacing:.02em;white-space:nowrap}
.side-nav{display:flex;flex-direction:column;gap:6px}
.side-link{
  position:relative;
  display:flex;align-items:center;gap:12px;
  padding:11px 12px;
  border-radius:12px;
  color:var(--text-2);
  font-size:15px;font-weight:600;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.side-link svg{width:20px;height:20px;flex:0 0 20px}
.side-link:hover{background:rgba(255,255,255,.05);color:var(--text)}
.side-link.active{background:rgba(43,227,200,.10);color:var(--text)}
.side-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:3px;
  background:var(--brand-500);
  box-shadow:0 0 12px rgba(43,227,200,.85);
}
.side-label{white-space:nowrap}
.side-divider{height:1px;background:var(--line);margin:4px 0}
.side-card{
  border-radius:var(--r-card);
  background:var(--card-bg);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  padding:14px;
}
.side-card p{font-size:13px;line-height:1.7;color:var(--text-2);margin-bottom:10px}
.btn-sm{padding:9px 14px;font-size:13.5px}
.side-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--text-3);padding-top:12px;border-top:1px solid var(--line)}
.side-foot a:hover{color:var(--brand-400)}

/* 移动端顶栏 */
.mobile-bar{
  position:sticky;top:0;z-index:70;
  display:none;align-items:center;justify-content:space-between;
  height:64px;padding:0 16px;
  background:rgba(5,8,15,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .24s var(--ease),border-color .24s var(--ease);
}
.mobile-bar.scrolled{background:rgba(5,8,15,.95);border-bottom-color:var(--line)}
.mobile-logo{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:700;letter-spacing:.02em}
.icon-btn{
  width:44px;height:44px;display:grid;place-items:center;
  border-radius:12px;background:rgba(255,255,255,.05);
  border:1px solid var(--line);color:var(--text);cursor:pointer;
  transition:background .2s var(--ease);
}
.icon-btn:hover{background:rgba(255,255,255,.1)}
.icon-btn svg{width:20px;height:20px}
.mobile-cta{padding:10px 14px;font-size:13.5px;border-radius:10px}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;z-index:80;
  background:rgba(3,6,12,.7);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s;
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:300px;max-width:88vw;z-index:90;
  display:flex;flex-direction:column;gap:18px;padding:18px;
  background:rgba(10,17,29,.94);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-left:1px solid var(--line);
  transform:translateX(100%);
  transition:transform .28s var(--ease);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line)}
.drawer-foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--line)}

/* 主区与容器 */
.main-wrap{position:relative;z-index:1;margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 48px}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{margin-bottom:28px;max-width:760px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--brand-400);text-transform:none}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand-500)}
h2.sec-title{font-size:clamp(26px,2.6vw,36px);margin-top:12px}
.sec-desc{margin-top:14px;color:var(--text-2);font-size:16px;line-height:1.85}

/* 页头 */
.page-hero{
  position:relative;
  margin:32px auto 0;
  border-radius:var(--r-block);
  overflow:hidden;
  min-height:320px;
  display:flex;align-items:flex-end;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.page-hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.page-hero-veil{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(5,8,15,.35) 0%,rgba(5,8,15,.72) 55%,rgba(5,8,15,.95) 100%),
    linear-gradient(90deg,rgba(5,8,15,.86),rgba(5,8,15,.28));
}
.page-hero-inner{position:relative;width:100%;padding:44px 44px 40px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:16px}
.crumb a:hover{color:var(--brand-400)}
.crumb .sep{color:rgba(255,255,255,.22)}
.crumb .now{color:var(--text-2)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  border-radius:999px;padding:5px 12px;
  font-size:12.5px;font-weight:700;letter-spacing:.02em;
  border:1px solid var(--line-strong);
  color:var(--text-2);
  background:rgba(255,255,255,.04);
}
.badge-accent{color:#CFCBFF;border-color:rgba(108,92,231,.5);background:rgba(108,92,231,.16)}
.badge-brand{color:#B6FFF2;border-color:rgba(43,227,200,.45);background:rgba(43,227,200,.13)}
.badge-warm{color:#FFDFB8;border-color:rgba(255,182,92,.4);background:rgba(255,182,92,.13)}
.page-hero h1{
  font-size:clamp(30px,4vw,50px);
  line-height:1.18;
  letter-spacing:-.01em;
  margin:16px 0 14px;
  max-width:820px;
}
.page-hero-sub{max-width:720px;color:var(--text-2);font-size:16.5px;line-height:1.85}
.lead{margin-top:24px;max-width:820px;color:var(--text-2);font-size:16.5px}

/* 图文交错 */
.split{display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:center;padding:34px 0}
.split + .split{border-top:1px solid var(--line)}
.split.reverse .split-media{order:2}
.split-media{
  position:relative;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  aspect-ratio:16/10;
  background:
    linear-gradient(135deg,rgba(43,227,200,.10),rgba(108,92,231,.12)),var(--ink-850);
}
.split-media img{width:100%;height:100%;object-fit:cover}
.split-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(5,8,15,.55))}
.split-body h3{font-size:20px;font-weight:700;margin-bottom:12px}
.split-body p{color:var(--text-2);line-height:1.9}
.split-body p + p{margin-top:10px}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:16px;font-size:14.5px;font-weight:700;color:var(--brand-400);
  transition:color .2s var(--ease),gap .2s var(--ease);
}
.text-link:hover{color:var(--brand-500);gap:10px}
.step-no{
  font-size:13px;font-weight:800;color:var(--warm-400);
  letter-spacing:.14em;font-variant-numeric:tabular-nums;
}

/* 卡片组（2 列） */
.cards-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:36px}
.media-card{
  display:flex;flex-direction:column;
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--card-bg);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.media-card:hover{transform:translateY(-3px);border-color:rgba(43,227,200,.34);box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 24px 60px rgba(0,0,0,.55)}
.media-card-cover{position:relative;aspect-ratio:16/9;background:var(--ink-850);overflow:hidden}
.media-card-cover img{width:100%;height:100%;object-fit:cover}
.media-card-cover .badge{position:absolute;left:12px;top:12px;background:rgba(9,14,24,.72);backdrop-filter:blur(8px)}
.media-card-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.media-card-body h3{font-size:18px;font-weight:700;line-height:1.5}
.media-card-body p{margin-top:10px;color:var(--text-2);font-size:15px;line-height:1.8}
.media-card-foot{
  margin-top:auto;padding-top:16px;
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.dot-sep{display:inline-block;width:4px;height:4px;border-radius:50%;background:currentColor;opacity:.5;margin:0 7px;vertical-align:middle}

/* 要点条 */
.point-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:32px}
.point{
  border-radius:var(--r-card);
  background:var(--card-bg);
  border:1px solid var(--line);
  padding:22px;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.point .k{font-size:26px;font-weight:800;color:var(--warm-400);font-variant-numeric:tabular-nums}
.point h4{margin-top:8px;font-size:16.5px;font-weight:700}
.point p{margin-top:6px;color:var(--text-2);font-size:14.5px;line-height:1.8}

/* FAQ */
.faq-wrap{max-width:820px;margin-top:32px}
.faq-item{
  border-radius:var(--r-card);
  background:var(--card-bg);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s var(--ease);
}
.faq-item[open]{border-color:rgba(43,227,200,.36)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;
  font-size:17px;font-weight:600;
  position:relative;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item[open] summary{color:#fff}
.faq-item[open] summary::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:3px;
  background:var(--brand-500);box-shadow:0 0 12px rgba(43,227,200,.8);
}
.faq-item summary svg{width:18px;height:18px;flex:0 0 18px;color:var(--brand-400);transition:transform .24s var(--ease)}
.faq-item[open] summary svg{transform:rotate(180deg)}
.faq-body{padding:0 20px 20px;color:var(--text-2);font-size:15px;line-height:1.85}

/* 表单 / CTA */
.cta-card{
  margin-top:36px;
  border-radius:var(--r-block);
  background:var(--card-bg);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.07),var(--shadow-card);
  padding:28px 30px;
  position:relative;
  overflow:hidden;
}
.cta-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--brand-500),rgba(108,92,231,.9),transparent);
  opacity:.85;
}
.cta-inline{display:flex;flex-wrap:wrap;align-items:flex-end;gap:14px}
.cta-inline .cta-copy{flex:1 1 260px;min-width:220px}
.cta-inline .cta-copy h3{font-size:19px;font-weight:700}
.cta-inline .cta-copy p{margin-top:6px;font-size:14px;color:var(--text-2);line-height:1.7}
.field{display:flex;flex-direction:column;gap:6px;flex:0 1 200px;min-width:160px}
.field label{font-size:13px;color:var(--text-2);font-weight:600}
.field input,.field select,.field textarea{
  width:100%;border-radius:var(--r-input);
  background:rgba(8,13,23,.72);
  border:1px solid var(--line-strong);
  padding:12px 14px;font-size:15px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.field input:focus,.field select:focus{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(43,227,200,.16);outline:none}
.field.error input{border-color:var(--err)}
.field .hint{font-size:12px;color:var(--err);min-height:14px}
.privacy-note{margin-top:16px;font-size:12px;color:var(--text-3);line-height:1.75}
.privacy-note a{color:var(--text-2);text-decoration:underline;text-underline-offset:3px}
.form-ok{
  display:none;align-items:center;gap:10px;
  padding:14px 16px;border-radius:var(--r-card);
  border:1px solid rgba(52,211,153,.4);background:rgba(52,211,153,.10);
  color:#C8F8E6;font-size:14.5px;font-weight:600;
}
.form-ok.show{display:flex}
.form-ok svg{width:20px;height:20px;color:var(--ok);flex:0 0 20px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);
  padding:12px 22px;
  font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary{background:var(--brand-500);color:#04140F;box-shadow:var(--shadow-glow)}
.btn-primary:hover{background:var(--brand-400);transform:translateY(-1px);box-shadow:var(--shadow-glow-hi)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 6px 18px -8px rgba(43,227,200,.5)}
.btn-ghost{background:transparent;border-color:rgba(43,227,200,.4);color:var(--brand-400)}
.btn-ghost:hover{background:rgba(43,227,200,.10);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-accent{background:transparent;border-color:rgba(108,92,231,.55);color:#C6C2FF}
.btn-accent:hover{background:rgba(108,92,231,.16);transform:translateY(-1px)}

/* 页脚 */
.site-foot{
  margin-top:auto;
  border-top:1px solid var(--line);
  background:rgba(6,10,18,.72);
  backdrop-filter:blur(14px);
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:36px;padding:56px 0 30px}
.foot-brand-row{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand-row strong{font-size:16px;font-weight:700;letter-spacing:.02em}
.foot-brand p{color:var(--text-2);font-size:14.5px;line-height:1.85;max-width:520px}
.foot-links{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.foot-links a{color:var(--text-2);font-size:14.5px;transition:color .2s var(--ease),transform .2s var(--ease)}
.foot-links a:hover{color:var(--brand-400);transform:translateX(2px)}
.foot-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  border-top:1px solid var(--line);
  padding-top:18px;padding-bottom:26px;
  font-size:12.5px;color:var(--text-3);
}

/* 进场动画 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .38s var(--ease),transform .38s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1279px){
  :root{--sidebar-w:76px}
  .side-logo-text,.side-label,.side-card p,.side-card .btn span,.side-foot span{display:none}
  .side-logo{justify-content:center;padding-left:0;padding-right:0}
  .side-link{justify-content:center;padding:12px 8px}
  .side-card{padding:10px;display:flex;justify-content:center}
  .side-foot{justify-content:center}
  .side-link::after{
    content:attr(data-tip);
    position:absolute;left:calc(100% + 12px);top:50%;transform:translateY(-50%) translateX(-6px);
    background:rgba(10,17,29,.96);border:1px solid var(--line-strong);border-radius:10px;
    padding:6px 11px;font-size:13px;font-weight:600;color:var(--text);white-space:nowrap;
    opacity:0;pointer-events:none;transition:opacity .2s var(--ease),transform .2s var(--ease);
    box-shadow:0 12px 30px rgba(0,0,0,.5);z-index:5;
  }
  .side-link:hover::after{opacity:1;transform:translateY(-50%) translateX(0)}
  .container{padding:0 32px}
  .split{grid-template-columns:1fr;gap:24px}
  .split.reverse .split-media{order:0}
  .section{padding:72px 0}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .mobile-bar{display:flex}
  .main-wrap{margin-left:0}
  .container{padding:0 20px}
  .cards-2{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:26px;padding:44px 0 24px}
  .foot-links{flex-direction:row;flex-wrap:wrap;gap:16px}
  .page-hero{margin:20px auto 0;min-height:260px}
  .page-hero-inner{padding:28px 24px 26px}
}
@media (max-width:640px){
  body{font-size:16px}
  .section{padding:56px 0}
  .section-tight{padding:48px 0}
  .point-row{grid-template-columns:1fr}
  .cta-card{padding:22px 18px}
  .cta-inline{flex-direction:column;align-items:stretch}
  .field{flex:1 1 auto;min-width:0}
  .btn{width:100%}
  .mobile-bar .btn{width:auto}
  .page-hero h1{font-size:clamp(26px,7vw,34px)}
  .foot-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink-950:#05080F;
  --ink-900:#0A111D;
  --ink-850:#0D1524;
  --brand-500:#2BE3C8;
  --brand-400:#5BF0DA;
  --brand-600:#12B9A2;
  --accent-500:#6C5CE7;
  --warm-400:#FFB65C;
  --text:#EAF2FF;
  --text-2:#9FB0C9;
  --text-3:#6B7C95;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --glass:rgba(16,26,44,.62);
  --glass-strong:rgba(14,22,38,.86);
  --ok:#34D399;
  --warn:#F59E0B;
  --err:#F87171;
  --r-card:16px;
  --r-block:24px;
  --r-btn:12px;
  --r-input:12px;
  --r-img:14px;
  --shadow-card:0 18px 50px rgba(0,0,0,.45);
  --shadow-glow:0 10px 30px -8px rgba(43,227,200,.55);
  --shadow-glow-hi:0 14px 40px -6px rgba(43,227,200,.70);
  --ease:cubic-bezier(.22,.8,.28,1);
  --side-w:248px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-950);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC","Inter",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(58% 42% at 10% 0%,rgba(43,227,200,.16),transparent 62%),
    radial-gradient(52% 44% at 94% 96%,rgba(108,92,231,.18),transparent 66%);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ============ 布局骨架 ============ */
.app-shell{position:relative;z-index:1;min-height:100vh}
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--side-w);
  display:flex;flex-direction:column;gap:18px;
  padding:22px 16px 18px;
  background:linear-gradient(180deg,rgba(10,17,29,.96),rgba(10,17,29,.88));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-right:1px solid var(--line);
  overflow-y:auto;z-index:60;
}
.sidebar::-webkit-scrollbar{width:6px}
.sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,.1);border-radius:99px}
.brand{display:flex;align-items:center;gap:10px;padding:6px 8px 14px;border-bottom:1px solid var(--line)}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:11px;display:grid;place-items:center;
  color:#03130F;background:linear-gradient(140deg,var(--brand-400),var(--brand-600));
  box-shadow:0 8px 24px -8px rgba(43,227,200,.65);
}
.brand-mark svg{width:20px;height:20px}
.brand-text{font-size:16px;font-weight:700;letter-spacing:.02em;line-height:1.35;color:var(--text)}
.side-nav{display:flex;flex-direction:column;gap:6px}
.side-link{
  position:relative;display:flex;align-items:center;gap:12px;
  min-height:46px;padding:11px 12px;border-radius:12px;
  color:var(--text-2);font-size:15px;font-weight:600;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.side-link svg{width:20px;height:20px;flex:0 0 20px}
.side-link:hover{background:rgba(255,255,255,.05);color:var(--text)}
.side-link.active{background:rgba(43,227,200,.10);color:var(--brand-400)}
.side-link.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:0 3px 3px 0;
  background:var(--brand-500);box-shadow:0 0 12px rgba(43,227,200,.9);
}
.side-sep{height:1px;background:var(--line);margin:4px 0}
.side-card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  padding:14px;box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.side-card p{font-size:13px;line-height:1.7;color:var(--text-2);margin-bottom:10px}
.side-card .btn{width:100%;justify-content:center;font-size:13px;padding:9px 12px}
.side-foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px}
.side-foot a,.side-foot span{font-size:12px;color:var(--text-3);letter-spacing:.02em}
.side-foot a:hover{color:var(--brand-400)}

.main-shell{margin-left:var(--side-w);position:relative;z-index:1}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 48px}

/* ============ 按钮 / 标签 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.btn svg{width:17px;height:17px}
.btn-primary{background:linear-gradient(135deg,var(--brand-400),var(--brand-500));color:#04140F;box-shadow:var(--shadow-glow)}
.btn-primary:hover{background:linear-gradient(135deg,var(--brand-400),var(--brand-400));box-shadow:var(--shadow-glow-hi);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 6px 18px -10px rgba(43,227,200,.6)}
.btn-ghost{background:transparent;border-color:rgba(43,227,200,.4);color:var(--brand-400)}
.btn-ghost:hover{background:rgba(43,227,200,.10);border-color:var(--brand-400);transform:translateY(-1px)}
.btn-quiet{background:rgba(255,255,255,.05);border-color:var(--line);color:var(--text-2)}
.btn-quiet:hover{background:rgba(255,255,255,.09);color:var(--text)}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:10px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:12.5px;font-weight:600;letter-spacing:.02em;
  background:rgba(108,92,231,.16);color:#B9B1FF;border:1px solid rgba(108,92,231,.36);
}
.badge-brand{background:rgba(43,227,200,.12);color:var(--brand-400);border-color:rgba(43,227,200,.34)}
.badge-warm{background:rgba(255,182,92,.14);color:var(--warm-400);border-color:rgba(255,182,92,.32)}

/* ============ 阅读进度 ============ */
.read-progress{
  position:fixed;top:0;left:var(--side-w);right:0;height:3px;z-index:80;
  background:rgba(255,255,255,.05);
}
.read-progress span{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--brand-600),var(--brand-400),var(--accent-500));
  box-shadow:0 0 12px rgba(43,227,200,.6);
  transition:width .12s linear;
}

/* ============ 顶部栏（移动） ============ */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;z-index:70;
  align-items:center;justify-content:space-between;gap:12px;padding:0 16px;
  background:rgba(8,13,24,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.topbar.scrolled{background:rgba(6,10,20,.96);border-bottom-color:var(--line-strong)}
.topbar .icon-btn{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);display:grid;place-items:center;cursor:pointer;
}
.topbar .icon-btn svg{width:21px;height:21px}
.topbar .brand-mini{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:700;letter-spacing:.01em}
.topbar .brand-mini .brand-mark{width:30px;height:30px;flex:0 0 30px;border-radius:9px}

/* ============ 抽屉 ============ */
.scrim{
  position:fixed;inset:0;background:rgba(3,6,12,.7);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease);z-index:88;
}
.scrim.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:300px;max-width:86vw;z-index:90;
  background:var(--glass-strong);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-left:1px solid var(--line);padding:18px 16px;
  display:flex;flex-direction:column;gap:16px;
  transform:translateX(102%);transition:transform .3s var(--ease);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line)}
.drawer-head strong{font-size:15px;letter-spacing:.02em}
.drawer-nav{display:flex;flex-direction:column;gap:6px}
.drawer-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line)}
.drawer-foot .btn{width:100%;justify-content:center}

/* ============ 文章头部 ============ */
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3);padding:38px 0 0}
.crumbs a{color:var(--text-3);transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--brand-400)}
.crumbs .sep{color:rgba(255,255,255,.2)}
.crumbs .now{color:var(--text-2)}

.article-hero{padding:22px 0 8px;max-width:820px}
.article-hero h1{
  font-size:clamp(28px,3.4vw,42px);
  line-height:1.28;font-weight:800;letter-spacing:-.01em;margin:16px 0 0;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  margin-top:18px;font-size:14px;color:var(--text-3);
}
.article-meta .m{display:inline-flex;align-items:center;gap:7px}
.article-meta svg{width:15px;height:15px;opacity:.85}
.hero-rule{margin-top:26px;height:1px;background:linear-gradient(90deg,rgba(43,227,200,.5),rgba(255,255,255,.06) 45%,transparent)}

/* ============ 正文 ============ */
.article-body{
  max-width:760px;margin:0 auto;padding:40px 0 8px;
  font-size:16.5px;line-height:1.95;color:#DCE7F7;
}
.article-body p{margin:0 0 20px}
.article-body h2{
  position:relative;font-size:22px;font-weight:700;margin:40px 0 16px;padding-left:15px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.42em;width:4px;height:18px;border-radius:2px;
  background:linear-gradient(180deg,var(--brand-400),var(--brand-600));
  box-shadow:0 0 12px rgba(43,227,200,.55);
}
.article-body h3{font-size:18px;font-weight:700;margin:28px 0 12px;color:var(--text)}
.article-body a{color:var(--brand-400);border-bottom:1px solid rgba(43,227,200,.35)}
.article-body a:hover{border-bottom-color:var(--brand-400)}
.article-body blockquote{
  margin:24px 0;padding:16px 18px;border-left:3px solid var(--brand-500);
  background:var(--glass);border-radius:0 12px 12px 0;color:var(--text-2);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
}
.article-body ul{margin:0 0 20px}
.article-body ul li{position:relative;padding-left:20px;margin:9px 0}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.74em;width:7px;height:7px;border-radius:2px;
  background:var(--brand-500);
}
.article-body ol{margin:0 0 20px;counter-reset:ol;padding-left:0}
.article-body ol li{position:relative;padding-left:32px;margin:10px 0;counter-increment:ol}
.article-body ol li::before{
  content:counter(ol);position:absolute;left:0;top:.28em;width:22px;height:22px;border-radius:7px;
  display:grid;place-items:center;font-size:12.5px;font-weight:700;color:#04140F;
  background:linear-gradient(140deg,var(--brand-400),var(--brand-600));
}
.article-body img{border-radius:var(--r-img);margin:20px auto;box-shadow:var(--shadow-card)}
.article-body figure{margin:22px 0}
.article-body figcaption,.article-body .caption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px}
.article-body table{
  width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;
  background:var(--glass);border:1px solid var(--line);border-radius:12px;overflow:hidden;
}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
.article-body th{background:rgba(255,255,255,.04);color:var(--text);font-weight:700}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.025)}
.article-body tbody td:first-child{font-weight:700;color:var(--text)}
.article-body code{background:rgba(43,227,200,.10);color:var(--brand-400);padding:2px 7px;border-radius:6px;font-size:14.5px}
.article-body hr{border:0;height:1px;background:var(--line);margin:32px 0}

.empty-state{
  max-width:760px;margin:40px auto;padding:34px 26px;text-align:center;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
}
.empty-state svg{width:36px;height:36px;color:var(--brand-400);margin:0 auto 14px}
.empty-state p{color:var(--text-2);font-size:15px;margin-bottom:16px}

/* ============ 相关推荐 ============ */
.block{padding:64px 0}
.block-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:28px}
.block-head h2{font-size:clamp(22px,2.2vw,28px)}
.block-head p{font-size:14.5px;color:var(--text-2);margin-top:8px;max-width:620px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.post-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.post-card:hover{transform:translateY(-3px);border-color:rgba(43,227,200,.34);box-shadow:0 22px 56px rgba(0,0,0,.5)}
.cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(140deg,rgba(43,227,200,.16),rgba(108,92,231,.16))}
.cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.post-card:hover .cover img{transform:scale(1.04)}
.cover .tag{position:absolute;left:12px;top:12px}
.post-card .body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card h3{font-size:17px;line-height:1.5;font-weight:700}
.post-card p{font-size:14px;color:var(--text-2);line-height:1.8}
.post-card .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);padding-top:6px}
.post-card .foot a{color:var(--brand-400);font-weight:600}
.post-card .foot a:hover{color:var(--brand-400);text-decoration:underline}

/* ============ 表单 ============ */
.form-block{padding:64px 0 0}
.form-card{
  max-width:720px;margin:0 auto;padding:30px 30px 26px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-block);
  box-shadow:var(--shadow-card);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  position:relative;overflow:hidden;
}
.form-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,var(--brand-500),var(--accent-500),transparent);
}
.form-card h2{font-size:24px;margin-bottom:8px}
.form-card .lead{font-size:14.5px;color:var(--text-2);margin-bottom:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:16px}
.field label{font-size:13.5px;color:var(--text-2);font-weight:600}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:var(--r-input);
  background:rgba(5,9,18,.72);border:1px solid var(--line);color:var(--text);
  font-size:15px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:#5C6C84}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:rgba(43,227,200,.6);box-shadow:0 0 0 3px rgba(43,227,200,.14);
}
.field textarea{min-height:104px;resize:vertical;line-height:1.7}
.field.err input,.field.err select,.field.err textarea{border-color:var(--err);box-shadow:0 0 0 3px rgba(248,113,113,.13)}
.field .tip{font-size:12px;color:var(--err);display:none}
.field.err .tip{display:block}
.check{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--text-2);line-height:1.7;margin:6px 0 18px}
.check input{width:17px;height:17px;margin-top:3px;accent-color:var(--brand-500);flex:0 0 17px}
.check a{color:var(--brand-400)}
.form-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.form-note{font-size:12px;color:var(--text-3);line-height:1.7;margin-top:14px}
.privacy-line{
  max-width:720px;margin:14px auto 0;font-size:12px;color:var(--text-3);line-height:1.75;text-align:center;
}
.form-success{
  display:none;text-align:center;padding:22px 8px;
}
.form-success.show{display:block}
.form-success svg{width:46px;height:46px;color:var(--ok);margin:0 auto 14px}
.form-success h3{font-size:20px;margin-bottom:8px}
.form-success p{font-size:14.5px;color:var(--text-2);max-width:440px;margin:0 auto}

/* ============ FAQ ============ */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
  transition:border-color .22s var(--ease);
}
.faq-item[open]{border-color:rgba(43,227,200,.34)}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 54px 18px 20px;font-size:17px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";position:absolute;right:20px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--brand-400);border-bottom:2px solid var(--brand-400);
  transform:translateY(-70%) rotate(45deg);transition:transform .24s var(--ease);
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq-item summary:hover{color:var(--brand-400)}
.faq-item .ans{
  position:relative;padding:0 22px 20px 20px;font-size:15px;line-height:1.85;color:var(--text-2);
}
.faq-item[open] .ans::before{
  content:"";position:absolute;left:0;top:4px;bottom:16px;width:3px;border-radius:0 3px 3px 0;
  background:var(--brand-500);box-shadow:0 0 10px rgba(43,227,200,.6);
}

/* ============ 页脚 CTA 条 / 页脚 ============ */
.cta-strip{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:22px 26px;border-radius:var(--r-block);
  background:var(--glass);border:1px solid var(--line);box-shadow:var(--shadow-card);
  margin-bottom:0;
}
.cta-strip strong{font-size:18px;font-weight:700;letter-spacing:-.01em}
.cta-strip span.sub{display:block;font-size:13.5px;color:var(--text-2);margin-top:4px;font-weight:400}

.site-foot{margin-top:72px;border-top:1px solid var(--line);background:rgba(5,9,18,.6);padding:52px 0 26px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:start}
.foot-brand-row{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand-row .brand-mark{width:32px;height:32px;flex:0 0 32px;border-radius:10px}
.foot-brand-row strong{font-size:16.5px;letter-spacing:.02em}
.foot-brand p{font-size:14px;color:var(--text-2);max-width:520px;line-height:1.85}
.foot-links{display:flex;flex-direction:column;gap:10px}
.foot-links a{font-size:14.5px;color:var(--text-2);transition:color .2s var(--ease),transform .2s var(--ease)}
.foot-links a:hover{color:var(--brand-400);transform:translateX(2px)}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  margin-top:36px;padding-top:18px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-3);
}

/* ============ 浮动按钮 / 弹层 ============ */
.float-btn{
  position:fixed;right:24px;bottom:24px;z-index:75;
  display:inline-flex;align-items:center;gap:9px;
  padding:14px 20px;border-radius:999px;border:1px solid rgba(43,227,200,.4);
  background:linear-gradient(135deg,rgba(43,227,200,.95),rgba(18,185,162,.95));
  color:#04140F;font-size:14.5px;font-weight:700;cursor:pointer;
  box-shadow:var(--shadow-glow-hi);transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.float-btn svg{width:18px;height:18px}
.float-btn:hover{transform:translateY(-2px)}
.modal{
  position:fixed;inset:0;z-index:95;display:grid;place-items:center;padding:20px;
  background:rgba(3,6,12,.72);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease);
}
.modal.open{opacity:1;visibility:visible}
.modal-card{
  position:relative;width:100%;max-width:560px;max-height:88vh;overflow-y:auto;
  background:var(--glass-strong);border:1px solid var(--line);border-radius:var(--r-block);
  padding:28px 28px 24px;box-shadow:0 30px 80px rgba(0,0,0,.6);
  transform:translateY(14px);transition:transform .26s var(--ease);
}
.modal.open .modal-card{transform:translateY(0)}
.modal-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;border-radius:24px 24px 0 0;
  background:linear-gradient(90deg,var(--brand-500),var(--accent-500),transparent);
}
.modal-close{
  position:absolute;right:14px;top:14px;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);cursor:pointer;
  display:grid;place-items:center;color:var(--text-2);
}
.modal-close:hover{color:var(--text);background:rgba(255,255,255,.09)}
.modal-card h3{font-size:21px;margin-bottom:8px;padding-right:52px}
.modal-card .lead{font-size:14px;color:var(--text-2);margin-bottom:20px}

/* ============ 进场动画 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  :root{--side-w:76px}
  .sidebar{padding:18px 10px;align-items:center}
  .brand{justify-content:center;padding:6px 0 14px;width:100%}
  .brand-text{display:none}
  .side-nav{width:100%}
  .side-link{justify-content:center;padding:12px 0}
  .side-label{display:none}
  .side-card{display:none}
  .side-foot{width:100%;align-items:center}
  .side-foot span{font-size:10px;text-align:center}
  .side-foot a{font-size:10px}
  .side-link::after{
    content:attr(data-tip);position:absolute;left:calc(100% + 12px);top:50%;transform:translateY(-50%);
    background:var(--glass-strong);border:1px solid var(--line);color:var(--text);
    padding:7px 12px;border-radius:10px;font-size:13px;white-space:nowrap;
    opacity:0;visibility:hidden;transition:opacity .18s var(--ease);pointer-events:none;
    box-shadow:var(--shadow-card);z-index:70;
  }
  .side-link:hover::after{opacity:1;visibility:visible}
  .container{padding:0 32px}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .topbar{display:flex}
  .main-shell{margin-left:0;padding-top:64px}
  .read-progress{left:0}
  .container{padding:0 24px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-grid{grid-template-columns:1fr;gap:24px}
  .block{padding:56px 0}
}
@media (max-width:640px){
  body{font-size:16px}
  .container{padding:0 20px}
  .card-grid{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .form-card{padding:22px 18px 20px}
  .block{padding:48px 0}
  .article-body{font-size:16px;padding-top:28px}
  .article-hero h1{font-size:26px}
  .float-btn{right:14px;bottom:14px;padding:12px 16px;font-size:13.5px}
  .cta-strip{padding:18px}
  .modal{padding:0;align-items:end}
  .modal-card{max-width:100%;border-radius:24px 24px 0 0;max-height:88vh;transform:translateY(100%)}
  .modal.open .modal-card{transform:translateY(0)}
  .crumbs{padding-top:26px}
  .article-body table{display:block;overflow-x:auto}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --ink-950:#05080F;
  --ink-900:#0A111D;
  --ink-850:#0D1524;
  --brand-500:#2BE3C8;
  --brand-400:#5BF0DA;
  --brand-600:#12B9A2;
  --accent-500:#6C5CE7;
  --warm-400:#FFB65C;
  --text-1:#EAF2FF;
  --text-2:#9FB0C9;
  --text-3:#6B7C95;
  --line:rgba(255,255,255,.08);
  --glass:rgba(16,26,44,.62);
  --r-card:16px;
  --r-block:24px;
  --r-btn:12px;
  --r-img:14px;
  --shadow-card:0 18px 50px rgba(0,0,0,.45);
  --ease:cubic-bezier(.22,.8,.28,1);
  --side-w:248px;
}
*,*::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","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--text-1);
  background-color:var(--ink-950);
  background-image:
    radial-gradient(60vw 60vw at 8% 0%, rgba(43,227,200,.15), transparent 62%),
    radial-gradient(52vw 52vw at 100% 86%, rgba(108,92,231,.16), transparent 60%);
  min-height:100vh;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}

/* ============ 侧栏 App Shell ============ */
.app-side{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--side-w);
  display:flex;
  flex-direction:column;
  gap:18px;
  padding:24px 18px;
  background:rgba(10,17,29,.88);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-right:1px solid var(--line);
  z-index:60;
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.app-side.scrolled{background:rgba(6,10,18,.94)}
.side-brand{
  display:flex;align-items:center;gap:10px;
  padding:4px 8px 6px;
}
.brand-mark{
  width:34px;height:34px;flex:none;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;
  background:linear-gradient(140deg,rgba(43,227,200,.22),rgba(108,92,231,.28));
  border:1px solid rgba(43,227,200,.35);
  color:var(--brand-400);
  box-shadow:0 8px 24px -10px rgba(43,227,200,.7);
}
.brand-mark svg{width:18px;height:18px}
.side-brand-text{
  font-size:16px;font-weight:700;letter-spacing:.02em;color:var(--text-1);
  line-height:1.3;
}
.side-nav{display:flex;flex-direction:column;gap:4px}
.side-link{
  position:relative;
  display:flex;align-items:center;gap:12px;
  padding:11px 12px;
  border-radius:12px;
  font-size:15px;font-weight:600;
  color:var(--text-2);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.side-link svg{width:20px;height:20px;flex:none}
.side-link:hover{background:rgba(255,255,255,.05);color:var(--text-1)}
.side-link.active{background:rgba(43,227,200,.10);color:#fff}
.side-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:3px;
  background:var(--brand-500);
  box-shadow:0 0 12px rgba(43,227,200,.9);
}
.side-sep{height:1px;background:var(--line);margin:6px 4px}
.side-card{
  margin-top:auto;
  padding:14px;
  border-radius:14px;
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.side-card p{
  font-size:13px;line-height:1.7;color:var(--text-2);margin-bottom:10px;
}
.side-foot{
  display:flex;align-items:center;justify-content:space-between;
  font-size:12px;color:var(--text-3);
  padding:0 4px;
}
.side-top-btn{
  font-size:12px;color:var(--text-3);
  padding:6px 8px;border-radius:8px;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.side-top-btn:hover{color:var(--brand-400);background:rgba(255,255,255,.05)}
.side-burger,.side-cta-m{display:none}

/* ============ 主内容 ============ */
.app-main{margin-left:var(--side-w);min-height:60vh}
.container{
  width:100%;max-width:1280px;margin:0 auto;
  padding-left:48px;padding-right:48px;
}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:32px}
.section-title{
  font-size:clamp(26px,2.6vw,36px);
  font-weight:700;line-height:1.3;letter-spacing:-.01em;
}
.section-sub{margin-top:14px;color:var(--text-2);font-size:15.5px;line-height:1.85}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.04em;
  color:var(--brand-400);
  padding:6px 12px;border-radius:999px;
  background:rgba(43,227,200,.10);
  border:1px solid rgba(43,227,200,.28);
  margin-bottom:18px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 10px var(--brand-500)}

/* ============ 页头 ============ */
.page-head{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-head-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.42;
}
.page-head::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.62) 0%,rgba(5,8,15,.80) 55%,rgba(5,8,15,.96) 100%);
}
.page-head .container{
  position:relative;z-index:2;
  padding-top:76px;padding-bottom:64px;
  min-height:300px;
  display:flex;flex-direction:column;justify-content:center;
}
.crumbs{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);margin-bottom:18px;
}
.crumbs a{color:var(--text-3);transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--brand-400)}
.crumbs span[aria-current]{color:var(--text-2)}
.page-title{
  font-size:clamp(32px,4.4vw,54px);
  font-weight:800;line-height:1.18;letter-spacing:-.01em;
  max-width:920px;
}
.page-lead{
  margin-top:18px;max-width:760px;
  color:var(--text-2);font-size:16.5px;line-height:1.85;
}
.page-lead + .page-lead{margin-top:10px}
.head-facts{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;
}
.fact-chip{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;color:var(--text-2);
  padding:8px 14px;border-radius:999px;
  background:rgba(16,26,44,.62);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.fact-chip strong{color:var(--warm-400);font-weight:700;font-variant-numeric:tabular-nums}

/* ============ 图文交错 ============ */
.split{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
  align-items:center;
}
.split + .split{margin-top:64px}
.split-media{grid-column:1 / span 5}
.split-body{grid-column:6 / span 7}
.split.rev .split-media{grid-column:8 / span 5}
.split.rev .split-body{grid-column:1 / span 7}
.split-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.split-body h3{
  font-size:20px;font-weight:700;margin:14px 0 12px;line-height:1.4;
}
.split-body p{color:var(--text-2);font-size:16px;line-height:1.85}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:16px;font-size:14.5px;font-weight:700;color:var(--brand-400);
  transition:gap .2s var(--ease),color .2s var(--ease);
}
.text-link:hover{gap:10px;color:var(--brand-500)}
.text-link::after{content:"→"}

/* ============ 标签与卡片 ============ */
.tag{
  display:inline-flex;align-items:center;
  font-size:12.5px;font-weight:700;letter-spacing:.02em;
  padding:5px 11px;border-radius:999px;
}
.tag-accent{background:rgba(108,92,231,.18);color:#B9B1FF;border:1px solid rgba(108,92,231,.42)}
.tag-brand{background:rgba(43,227,200,.12);color:var(--brand-400);border:1px solid rgba(43,227,200,.32)}
.tag-warm{background:rgba(255,182,92,.14);color:var(--warm-400);border:1px solid rgba(255,182,92,.32)}

.card-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
  margin-top:36px;
}
.card{
  position:relative;
  display:flex;flex-direction:column;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(43,227,200,.55),transparent);
}
.card:hover{transform:translateY(-2px);border-color:rgba(43,227,200,.34)}
.card-cover{aspect-ratio:16/9;object-fit:cover;width:100%}
.card-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}
.card h3{font-size:18px;font-weight:700;line-height:1.5}
.card p{font-size:14.5px;color:var(--text-2);line-height:1.8}
.card-foot{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.card-foot a{color:var(--brand-400);font-weight:700;transition:color .2s var(--ease)}
.card-foot a:hover{color:var(--brand-500)}

/* ============ FAQ ============ */
.faq{max-width:820px;margin-top:34px}
.faq details{
  position:relative;
  margin-bottom:12px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:14px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  overflow:hidden;
  transition:border-color .24s var(--ease);
}
.faq details[open]{border-color:rgba(43,227,200,.34)}
.faq details[open]::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand-500);
  box-shadow:0 0 12px rgba(43,227,200,.8);
}
.faq summary{
  list-style:none;cursor:pointer;
  padding:18px 58px 18px 22px;
  font-size:17px;font-weight:600;line-height:1.6;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";position:absolute;right:24px;top:26px;
  width:9px;height:9px;border-right:2px solid var(--brand-500);border-bottom:2px solid var(--brand-500);
  transform:rotate(45deg);transition:transform .25s var(--ease);
}
.faq details[open] summary::after{transform:rotate(-135deg)}
.faq .faq-body{
  padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--text-2);
}

/* ============ CTA 与表单 ============ */
.cta-bar{
  position:relative;
  display:grid;
  grid-template-columns:1.25fr 1fr;
  gap:28px;
  align-items:center;
  padding:30px;
  border-radius:var(--r-block);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.cta-bar::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(43,227,200,.6),rgba(108,92,231,.5),transparent);
}
.cta-copy h2{font-size:clamp(22px,2.2vw,28px);font-weight:700;line-height:1.35}
.cta-copy p{margin-top:10px;font-size:15px;color:var(--text-2);line-height:1.8}
.cta-form{display:flex;gap:10px;align-items:flex-start;flex-wrap:wrap}
.field{flex:1 1 220px;min-width:0;position:relative}
.field input{
  width:100%;
  padding:13px 16px;
  border-radius:var(--r-btn);
  background:rgba(8,14,24,.75);
  border:1px solid var(--line);
  color:var(--text-1);
  font-size:15px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field input::placeholder{color:var(--text-3)}
.field input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(43,227,200,.16)}
.field.error input{border-color:#F87171;box-shadow:0 0 0 3px rgba(248,113,113,.14)}
.field-tip{font-size:12px;color:#F87171;margin-top:6px;display:none}
.field.error .field-tip{display:block}
.form-ok{
  display:flex;align-items:center;gap:12px;
  padding:14px 16px;border-radius:var(--r-btn);
  background:rgba(52,211,153,.10);
  border:1px solid rgba(52,211,153,.35);
  font-size:14.5px;color:#9DF3D6;
  flex:1 1 260px;
}
.form-ok svg{width:22px;height:22px;flex:none;color:#34D399}
.privacy-note{
  margin-top:18px;font-size:12.5px;line-height:1.7;color:var(--text-3);max-width:820px;
}
.privacy-note a{color:var(--text-2);border-bottom:1px dashed rgba(255,255,255,.24)}
.privacy-note a:hover{color:var(--brand-400);border-color:rgba(43,227,200,.6)}
.cta-divider{height:1px;background:var(--line);margin:72px 0 0}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;font-weight:700;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.btn-primary{
  background:var(--brand-500);color:#04161B;
  box-shadow:0 10px 30px -8px rgba(43,227,200,.55);
}
.btn-primary:hover{
  background:var(--brand-400);
  transform:translateY(-1px);
  box-shadow:0 14px 40px -6px rgba(43,227,200,.70);
}
.btn-primary:active{transform:translateY(1px);box-shadow:0 6px 18px -10px rgba(43,227,200,.5)}
.btn-ghost{
  background:transparent;color:var(--text-1);
  border-color:rgba(255,255,255,.18);
}
.btn-ghost:hover{border-color:rgba(43,227,200,.5);color:var(--brand-400);transform:translateY(-1px)}
.btn-sm{padding:10px 16px;font-size:13.5px;border-radius:10px}
.btn-block{width:100%}

/* ============ 页脚 ============ */
.site-foot{
  margin-left:var(--side-w);
  border-top:1px solid var(--line);
  background:rgba(8,13,23,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.foot-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr;
  gap:36px;
  padding-top:56px;padding-bottom:36px;
}
.foot-brand-row{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand-row strong{font-size:16px;font-weight:700;letter-spacing:.02em}
.foot-brand p{font-size:14px;color:var(--text-2);line-height:1.8;max-width:520px}
.foot-links{display:flex;flex-direction:column;gap:10px;justify-content:flex-start}
.foot-links a{
  font-size:14.5px;color:var(--text-2);
  transition:color .2s var(--ease);
  width:fit-content;
}
.foot-links a:hover{color:var(--brand-400)}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding-top:18px;padding-bottom:24px;
  border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-3);
}

/* ============ 抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;z-index:80;
  background:rgba(3,6,12,.7);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  opacity:0;pointer-events:none;
  transition:opacity .25s var(--ease);
}
.drawer-mask.show{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:300px;z-index:90;
  display:none;flex-direction:column;gap:16px;
  padding:20px;
  background:rgba(10,17,29,.96);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-left:1px solid var(--line);
  transform:translateX(100%);
  transition:transform .3s var(--ease);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.drawer-head strong{font-size:15.5px;font-weight:700}
.drawer-close{
  width:44px;height:44px;flex:none;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  color:var(--text-2);cursor:pointer;font-size:20px;line-height:1;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.drawer-close:hover{color:var(--brand-400);border-color:rgba(43,227,200,.5)}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{
  display:flex;align-items:center;gap:12px;
  min-height:44px;padding:11px 12px;border-radius:12px;
  font-size:15px;font-weight:600;color:var(--text-2);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.drawer-nav a svg{width:20px;height:20px;flex:none}
.drawer-nav a:hover{background:rgba(255,255,255,.05);color:var(--text-1)}
.drawer-nav a.active{background:rgba(43,227,200,.10);color:#fff}
.drawer-cta{margin-top:auto}

/* ============ 进场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============ 平板 ============ */
@media (max-width:1279px){
  .app-side{width:76px;padding:22px 10px;align-items:center;gap:14px}
  .side-brand{justify-content:center;padding:0;width:100%}
  .side-brand-text{display:none}
  .side-nav{width:100%;align-items:center}
  .side-label{display:none}
  .side-link{justify-content:center;padding:12px;width:100%}
  .side-card{display:none}
  .side-foot{display:none}
  .side-link::after{
    content:attr(data-tip);
    position:absolute;left:calc(100% + 12px);top:50%;
    transform:translateY(-50%) translateX(-4px);
    padding:6px 10px;border-radius:8px;
    background:#0F1A2C;border:1px solid var(--line);
    color:var(--text-1);font-size:13px;font-weight:600;white-space:nowrap;
    opacity:0;pointer-events:none;
    transition:opacity .2s var(--ease),transform .2s var(--ease);
    z-index:70;
  }
  .side-link:hover::after{opacity:1;transform:translateY(-50%) translateX(0)}
  .app-main{margin-left:76px}
  .site-foot{margin-left:76px}
  .container{padding-left:32px;padding-right:32px}
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
  .split-media{grid-column:1 / span 5}
  .split-body{grid-column:6 / span 7}
  .split.rev .split-media{grid-column:8 / span 5}
  .split.rev .split-body{grid-column:1 / span 7}
}

/* ============ 移动端 ============ */
@media (max-width:1023px){
  .app-side{
    inset:0 0 auto 0;
    width:auto;height:64px;
    flex-direction:row;align-items:center;justify-content:space-between;
    padding:0 16px;gap:12px;
    border-right:0;border-bottom:1px solid transparent;
    background:rgba(7,12,21,.88);
  }
  .app-side.scrolled{border-bottom-color:var(--line);background:rgba(5,9,17,.96)}
  .side-nav{display:none}
  .side-brand{justify-content:flex-start;width:auto;flex:1 1 auto;min-width:0}
  .side-brand-text{display:block;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .side-burger{
    display:inline-flex;align-items:center;justify-content:center;
    width:44px;height:44px;flex:none;
    border-radius:12px;
    border:1px solid var(--line);
    background:rgba(255,255,255,.04);
    color:var(--text-2);
    cursor:pointer;
    transition:color .2s var(--ease),border-color .2s var(--ease);
  }
  .side-burger:hover{color:var(--brand-400);border-color:rgba(43,227,200,.5)}
  .side-burger svg{width:20px;height:20px}
  .side-cta-m{display:inline-flex;flex:none}
  .drawer{display:flex}
  .app-main{margin-left:0;padding-top:64px}
  .site-foot{margin-left:0}
  .container{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .page-head .container{padding-top:52px;padding-bottom:44px;min-height:260px}
  .split{grid-template-columns:1fr;gap:20px}
  .split-media,.split-body,
  .split.rev .split-media,.split.rev .split-body{grid-column:1 / -1}
  .split.rev .split-media{order:0}
  .split + .split{margin-top:48px}
  .card-grid{grid-template-columns:1fr;gap:18px}
  .cta-bar{grid-template-columns:1fr;padding:22px;gap:20px}
  .cta-form{flex-direction:column;align-items:stretch}
  .field{flex:1 1 auto}
  .btn{width:100%}
  .cta-form .btn{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:24px;padding-top:40px;padding-bottom:28px}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:6px}
  .faq summary{padding:16px 52px 16px 18px;font-size:16px}
  .faq summary::after{right:20px;top:24px}
  .faq .faq-body{padding:0 18px 18px}
  .cta-divider{margin-top:48px}
}

@media (max-width:520px){
  body{font-size:16px;line-height:1.8}
  .page-title{font-size:30px}
  .head-facts{gap:8px}
  .fact-chip{font-size:12.5px;padding:7px 12px}
  .card-body{padding:16px}
  .split-body h3{font-size:18px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .reveal{opacity:1;transform:none}
}