/* roulang page: index */
/* ============================================================
   设计变量
   ============================================================ */
:root{
  --c-bg:#0E0D1A;
  --c-bg-2:#0A0916;
  --c-panel:#171633;
  --c-panel-2:#1E1C3A;
  --c-line:rgba(255,255,255,.08);
  --c-line-strong:rgba(255,255,255,.16);
  --c-primary:#6D3BF5;
  --c-primary-2:#8F6BFF;
  --c-accent:#2FE3C0;
  --c-cta:#FF7A2F;
  --c-cta-hover:#FF9256;
  --c-cta-text:#17110A;
  --c-text:#F3F2FA;
  --c-text-2:#B4B1CC;
  --c-text-3:#7E7B99;
  --c-paper:#FBFAF7;
  --c-paper-2:#F3F1EB;
  --c-paper-text:#1B1A26;
  --c-paper-text-2:#4A4757;
  --c-paper-line:#E6E3DC;

  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:Inter,"DIN Alternate",system-ui,-apple-system,"Segoe UI",sans-serif;

  --r-card:18px;
  --r-img:14px;
  --r-input:10px;
  --r-pill:999px;

  --sh-card:0 18px 40px -24px rgba(0,0,0,.7);
  --sh-float:0 24px 60px -28px rgba(0,0,0,.85);

  --ease:.28s cubic-bezier(.2,.7,.3,1);
  --nav-w:248px;
  --topbar-h:56px;
}

/* ============================================================
   Reset / 基础
   ============================================================ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html:not(.reduce-motion){scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  text-align:left;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;height:auto;display:block;border-style:none}
a{color:var(--c-accent);text-decoration:none;transition:color var(--ease),background-color var(--ease),border-color var(--ease),transform var(--ease)}
a:hover{color:var(--c-primary-2)}
h1,h2,h3,h4,h5,h6{margin:0 0 .6em;color:inherit;font-weight:800;line-height:1.25;text-rendering:optimizeLegibility}
p{margin:0 0 1.2em}
ul,ol{margin:0 0 1.2em;padding-left:1.15em}
li{margin-bottom:.45em}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea,select{font-family:inherit;font-size:16px}
figure{margin:0}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}

.skip-link{
  position:fixed;left:12px;top:-60px;z-index:200;
  background:var(--c-primary);color:#fff;padding:10px 18px;border-radius:var(--r-pill);
  font-size:14px;transition:top var(--ease);
}
.skip-link:focus{top:12px;color:#fff}

/* ============================================================
   通用容器 / 排版
   ============================================================ */
.container{width:100%;max-width:1120px;margin:0 auto;padding:0 24px}
.container-wide{max-width:1280px}
.section{padding:96px 0}
.section-dark{background:var(--c-bg)}
.section-panel{background:var(--c-panel);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section-head{margin-bottom:32px;max-width:760px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.06em;
  color:var(--c-accent);background:rgba(47,227,192,.12);
  padding:5px 12px;border-radius:var(--r-pill);margin-bottom:16px;
}
.eyebrow.purple{color:var(--c-primary-2);background:rgba(109,59,245,.16)}
h1{font-size:clamp(34px,5vw,60px);line-height:1.18;letter-spacing:-.01em;font-weight:800}
h2{font-size:clamp(26px,3.4vw,40px);line-height:1.24;font-weight:800}
h3{font-size:22px;line-height:1.4;font-weight:700}
h4{font-size:18px;line-height:1.5;font-weight:700}
.lead{font-size:17px;line-height:1.85;color:var(--c-text-2);margin-bottom:0}
.small{font-size:14px;color:var(--c-text-2);line-height:1.7}
.tiny{font-size:13px;color:var(--c-text-3);line-height:1.65}
.mono-num{font-family:var(--font-num);font-variant-numeric:tabular-nums}
.hr-line{height:1px;background:var(--c-line);border:0;margin:0}

/* ============================================================
   按钮
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1.2;letter-spacing:.01em;
  border:1px solid transparent;text-align:center;white-space:nowrap;
  transition:transform var(--ease),background-color var(--ease),border-color var(--ease),color var(--ease),box-shadow var(--ease),filter var(--ease);
}
.btn svg{width:18px;height:18px;flex:0 0 auto}
.btn-cta{background:var(--c-cta);color:var(--c-cta-text);box-shadow:0 14px 30px -18px rgba(255,122,47,.9)}
.btn-cta:hover{background:var(--c-cta-hover);color:var(--c-cta-text);transform:translateY(-2px)}
.btn-cta:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.25)}
.btn-ghost{background:transparent;color:var(--c-primary-2);border-color:rgba(143,107,255,.55)}
.btn-ghost:hover{background:rgba(109,59,245,.14);color:var(--c-text);border-color:var(--c-primary-2);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-dark{background:var(--c-panel-2);color:var(--c-text);border-color:var(--c-line-strong)}
.btn-dark:hover{background:#26244a;color:var(--c-text);transform:translateY(-2px)}
.btn-block{width:100%}
.btn-lg{padding:16px 32px;font-size:16px}
.btn:disabled,.btn.is-disabled{opacity:.45;transform:none;pointer-events:none}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;
  color:var(--c-accent);position:relative;
}
.link-arrow::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
}
.link-arrow:hover::after{transform:scaleX(1)}
.link-arrow svg{width:16px;height:16px}

/* ============================================================
   App Shell / 侧栏
   ============================================================ */
.skip-anchor{position:absolute}
.app{min-height:100vh}

.sidebar{
  position:fixed;inset:0 auto 0 0;width:var(--nav-w);z-index:120;
  background:var(--c-bg-2);border-right:1px solid var(--c-line);
  display:flex;flex-direction:column;
  overflow-y:auto;overscroll-behavior:contain;
}
.sidebar-top{padding:20px 20px 0;min-height:88px}
.brand{display:flex;align-items:center;gap:12px;color:var(--c-text)}
.brand:hover{color:var(--c-text)}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  background:linear-gradient(140deg,var(--c-primary),#4A21C9);
  display:grid;place-items:center;box-shadow:0 10px 24px -14px rgba(109,59,245,.95);
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;font-size:15px;font-weight:700;line-height:1.3;letter-spacing:.01em}
.brand-sub{font-size:11px;font-weight:500;color:var(--c-text-3);letter-spacing:.04em;margin-top:3px}

.side-nav{display:flex;flex-direction:column;padding:24px 12px 8px;gap:2px}
.nav-label{
  font-size:11px;font-weight:600;letter-spacing:.08em;color:var(--c-text-3);
  padding:0 10px 8px;
}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;height:48px;padding:0 12px 0 14px;
  border-radius:10px;font-size:14px;font-weight:600;color:var(--c-text-2);
}
.nav-item::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;background:var(--c-primary);border-radius:2px;transition:height var(--ease);
}
.nav-item:hover{background:rgba(109,59,245,.12);color:var(--c-text)}
.nav-item:hover::before{height:20px}
.nav-item.is-active{background:rgba(109,59,245,.12);color:var(--c-text)}
.nav-item.is-active::before{height:26px}
.nav-item svg{width:18px;height:18px;color:var(--c-primary-2)}

.side-anchors{display:flex;flex-direction:column;padding:8px 12px 20px;gap:1px}
.anchor-item{
  position:relative;display:flex;align-items:center;height:40px;padding:0 12px 0 14px;
  border-radius:9px;font-size:13px;color:var(--c-text-3);
}
.anchor-item::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;background:var(--c-primary);border-radius:2px;transition:height var(--ease);
}
.anchor-item:hover{background:rgba(109,59,245,.1);color:var(--c-text-2)}
.anchor-item.is-current{background:rgba(109,59,245,.12);color:var(--c-text)}
.anchor-item.is-current::before{height:20px}

.sidebar-bottom{
  margin-top:auto;padding:16px 20px 24px;border-top:1px solid var(--c-line);
  display:flex;flex-direction:column;gap:10px;
}
.sidebar-bottom .btn{width:100%}
.foot-mini{font-size:12px;color:var(--c-text-3);line-height:1.6;margin:0}

/* 移动端顶栏 */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:var(--topbar-h);z-index:130;
  background:rgba(10,9,22,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);align-items:center;justify-content:space-between;
  padding:0 14px;
}
.topbar .brand-mark{width:32px;height:32px;flex-basis:32px;border-radius:10px}
.topbar .brand-mark svg{width:18px;height:18px}
.topbar .brand-text{font-size:14px}
.topbar .brand-sub{display:none}
.burger{
  width:42px;height:42px;border-radius:11px;border:1px solid var(--c-line-strong);
  display:grid;place-items:center;background:var(--c-panel);
}
.burger span{display:block;width:18px;height:2px;background:var(--c-text);border-radius:2px;position:relative}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-text);border-radius:2px;
}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.overlay{
  position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:110;
  opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);
}
.overlay.is-open{opacity:1;visibility:visible}

.main{margin-left:var(--nav-w);min-height:100vh;background:var(--c-bg)}
.main-inner{max-width:1120px;margin:0 auto;padding:0 24px}
section[id]{scroll-margin-top:72px}

/* ============================================================
   Hero
   ============================================================ */
.hero{
  position:relative;overflow:hidden;
  min-height:78vh;display:flex;align-items:center;
  padding:80px 0 72px;
  background:
    linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px) 0 0/40px 40px,
    linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px) 0 0/40px 40px,
    var(--c-bg);
  border-bottom:1px solid var(--c-line);
}
.hero-glow{
  position:absolute;top:-18%;left:6%;width:60%;max-width:760px;aspect-ratio:1/1;
  background:radial-gradient(circle,rgba(109,59,245,.42) 0%,rgba(109,59,245,.14) 42%,transparent 68%);
  pointer-events:none;filter:blur(6px);
}
.hero-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;gap:48px}
.hero-copy{flex:1 1 520px;min-width:0}
.hero-media{flex:1 1 380px;min-width:0}
.hero h1{margin-bottom:18px}
.hero h1 .hl{color:var(--c-accent)}
.hero-sub{font-size:18px;line-height:1.7;color:var(--c-text-2);max-width:36em;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-trust{display:flex;flex-wrap:wrap;gap:14px 28px;padding-top:24px;border-top:1px solid var(--c-line)}
.trust-item{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--c-text-2)}
.trust-item svg{width:20px;height:20px;color:var(--c-accent);flex:0 0 auto}

.hero-figure{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--c-line-strong);box-shadow:var(--sh-float);
  aspect-ratio:4/3;background:var(--c-panel);
}
.hero-figure img{width:100%;height:100%;object-fit:cover}
.hero-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(109,59,245,.42),rgba(14,13,26,.55));
  mix-blend-mode:multiply;
}
.hero-corner{
  position:absolute;width:14px;height:14px;border:2px solid var(--c-accent);z-index:3;
}
.hero-corner.tl{top:14px;left:14px;border-right:0;border-bottom:0}
.hero-corner.br{bottom:14px;right:14px;border-left:0;border-top:0}

/* ============================================================
   卖点（非对称网格）
   ============================================================ */
.selling-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  position:relative;background:var(--c-panel-2);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-card),inset 0 1px 0 rgba(255,255,255,.04);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
  overflow:hidden;
}
.card:hover{transform:translateY(-2px);border-color:rgba(109,59,245,.42)}
.card h3{margin-bottom:10px}
.card p{font-size:14px;line-height:1.8;color:var(--c-text-2);margin-bottom:0}
.card-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:rgba(109,59,245,.16);border:1px solid rgba(143,107,255,.3);margin-bottom:16px;
}
.card-icon svg{width:22px;height:22px;color:var(--c-primary-2)}
.card-icon.green{background:rgba(47,227,192,.12);border-color:rgba(47,227,192,.3)}
.card-icon.green svg{color:var(--c-accent)}
.sell-lg{grid-column:span 2;padding:32px;display:flex;flex-direction:column;gap:20px}
.sell-lg h3{font-size:24px}
.sell-lg .sell-figure{
  border-radius:var(--r-img);overflow:hidden;border:1px solid var(--c-line);
  aspect-ratio:16/9;background:var(--c-panel);
}
.sell-lg .sell-figure img{width:100%;height:100%;object-fit:cover}
.sell-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.sell-list li{display:flex;gap:9px;font-size:14px;color:var(--c-text-2);margin:0}
.sell-list svg{width:17px;height:17px;color:var(--c-accent);flex:0 0 auto;margin-top:4px}

/* ============================================================
   演示 / 流程
   ============================================================ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-bottom:40px}
.step{position:relative;padding:0 22px 0 0}
.step:last-child{padding-right:0}
.step-num{
  font-family:var(--font-num);font-size:40px;font-weight:700;line-height:1;
  color:var(--c-accent);letter-spacing:-.02em;margin-bottom:14px;display:block;
}
.step h3{font-size:18px;margin-bottom:8px}
.step p{font-size:13.5px;line-height:1.75;color:var(--c-text-2);margin:0}
.step::before{
  content:"";position:absolute;top:22px;right:8px;width:14px;height:1px;background:var(--c-line-strong);
}
.step:last-child::before{display:none}

.demo-lower{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:stretch}
.wireframe{
  background:var(--c-panel);border:1px solid var(--c-line-strong);border-radius:var(--r-card);
  padding:16px;box-shadow:var(--sh-card);
}
.wire-bar{display:flex;gap:6px;margin-bottom:16px}
.wire-bar span{width:9px;height:9px;border-radius:50%;background:var(--c-line-strong)}
.wire-bar span:first-child{background:rgba(255,122,47,.7)}
.wire-body{display:grid;gap:12px}
.wire-block{height:16px;border-radius:6px;background:linear-gradient(90deg,rgba(109,59,245,.35),rgba(109,59,245,.12))}
.wire-block.w-70{width:70%}
.wire-block.w-45{width:45%}
.wire-block.w-85{width:85%}
.wire-block.accent{background:linear-gradient(90deg,rgba(47,227,192,.35),rgba(47,227,192,.1))}
.wire-box{height:96px;border-radius:12px;border:1px dashed var(--c-line-strong);background:rgba(255,255,255,.02)}
.wire-foot{display:flex;gap:10px;margin-top:4px}
.wire-pill{height:30px;flex:1;border-radius:999px;background:rgba(255,122,47,.28)}

.paper-panel{
  background:var(--c-paper);color:var(--c-paper-text);border-radius:var(--r-card);
  padding:32px;box-shadow:var(--sh-card);
}
.paper-panel h3{color:var(--c-paper-text);font-size:20px;margin-bottom:12px}
.paper-panel p{color:var(--c-paper-text-2);font-size:15px;line-height:1.9;margin-bottom:14px}
.paper-panel p:last-child{margin-bottom:0}
.paper-panel .paper-tag{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.06em;
  color:#5B2FCF;background:rgba(109,59,245,.1);padding:4px 11px;border-radius:var(--r-pill);margin-bottom:14px;
}
.paper-panel ul{margin:0;padding-left:0;list-style:none}
.paper-panel ul li{
  position:relative;padding-left:18px;font-size:15px;color:var(--c-paper-text-2);margin-bottom:8px;
}
.paper-panel ul li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;background:var(--c-primary);
}

/* ============================================================
   证据区
   ============================================================ */
.proof-top{display:grid;grid-template-columns:5fr 7fr;gap:32px;align-items:center}
.proof-figure{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line-strong);aspect-ratio:4/3;background:var(--c-panel)}
.proof-figure img{width:100%;height:100%;object-fit:cover}
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--c-line);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden}
.stat{background:var(--c-panel-2);padding:26px 24px}
.stat-num{
  font-family:var(--font-num);font-size:40px;font-weight:700;line-height:1;
  color:var(--c-accent);letter-spacing:-.02em;margin-bottom:10px;
}
.stat-label{font-size:14px;color:var(--c-text-2);line-height:1.6}
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:56px;border-top:1px solid var(--c-line);padding-top:36px}
.quote{padding:0 28px;border-left:1px solid var(--c-line)}
.quote:first-child{border-left:0;padding-left:0}
.quote:last-child{padding-right:0}
.quote-mark{font-family:var(--font-num);font-size:34px;line-height:1;color:var(--c-primary-2);opacity:.7;margin-bottom:10px}
.quote p{font-size:14.5px;line-height:1.85;color:var(--c-text-2);margin-bottom:18px}
.quote-who{display:flex;align-items:center;gap:11px}
.avatar{
  width:40px;height:40px;border-radius:50%;flex:0 0 40px;display:grid;place-items:center;
  font-size:15px;font-weight:700;color:#0E0D1A;background:linear-gradient(140deg,var(--c-accent),#22B99C);
}
.avatar.p2{background:linear-gradient(140deg,var(--c-primary-2),#5A2BD8);color:#fff}
.avatar.p3{background:linear-gradient(140deg,#FFB27A,var(--c-cta));color:#1A1108}
.quote-name{font-size:13px;color:var(--c-text-3);line-height:1.5}
.quote-name b{display:block;color:var(--c-text);font-size:13px;font-weight:600}

/* ============================================================
   最新信息（CMS 列表）
   ============================================================ */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.news-head .section-head{margin-bottom:0}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  background:var(--c-panel-2);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-card);transition:transform var(--ease),border-color var(--ease);
  display:flex;
}
.news-card:hover{transform:translateY(-2px);border-color:rgba(109,59,245,.42)}
.news-link{display:flex;flex-direction:column;width:100%;color:var(--c-text)}
.news-link:hover{color:var(--c-text)}
.news-thumb{
  position:relative;aspect-ratio:16/10;background:linear-gradient(140deg,#2A2458,#141230);overflow:hidden;
}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.thumb-shape{
  position:absolute;inset:0;
  background:
    linear-gradient(130deg,rgba(109,59,245,.75),rgba(23,22,51,.9)),
    repeating-linear-gradient(45deg,rgba(255,255,255,.05) 0 12px,transparent 12px 24px);
}
.news-badge{
  position:absolute;top:12px;left:12px;z-index:2;
  font-size:12px;font-weight:600;letter-spacing:.06em;
  color:#0E0D1A;background:var(--c-accent);padding:4px 11px;border-radius:var(--r-pill);
}
.news-body{padding:20px;display:flex;flex-direction:column;flex:1}
.news-body h3{font-size:17px;line-height:1.45;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-excerpt{
  font-size:14px;line-height:1.75;color:var(--c-text-2);margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:14px;border-top:1px solid var(--c-line);
}
.news-date{font-size:13px;color:var(--c-text-3);font-family:var(--font-num)}
.news-go{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--c-accent)}
.news-go svg{width:15px;height:15px;transition:transform var(--ease)}
.news-card:hover .news-go svg{transform:translateX(3px)}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:16px;padding:64px 24px;text-align:center;
  background:var(--c-panel-2);border:1px dashed var(--c-line-strong);border-radius:var(--r-card);
}
.empty-state svg{width:64px;height:64px;color:rgba(109,59,245,.45)}
.empty-state p{font-size:16px;color:var(--c-text-2);margin:0}

/* ============================================================
   价格 / 服务方案
   ============================================================ */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.plan{
  position:relative;background:var(--c-panel-2);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:32px 28px;display:flex;flex-direction:column;
  box-shadow:var(--sh-card);transition:transform var(--ease),border-color var(--ease);
}
.plan:hover{transform:translateY(-2px);border-color:rgba(109,59,245,.42)}
.plan.featured{
  border-color:rgba(109,59,245,.75);transform:translateY(-16px);
  background:linear-gradient(180deg,rgba(109,59,245,.14),rgba(30,28,58,.9));
  box-shadow:0 30px 60px -32px rgba(109,59,245,.8);
}
.plan.featured:hover{transform:translateY(-18px)}
.plan-flag{
  position:absolute;top:-12px;right:20px;
  font-size:12px;font-weight:700;letter-spacing:.06em;
  color:var(--c-cta-text);background:var(--c-cta);padding:5px 13px;border-radius:var(--r-pill);
}
.plan h3{font-size:20px;margin-bottom:6px}
.plan-desc{font-size:14px;color:var(--c-text-2);margin-bottom:20px}
.plan-price{
  font-family:var(--font-num);font-size:34px;font-weight:700;line-height:1;
  color:var(--c-text);margin-bottom:6px;letter-spacing:-.02em;
}
.plan-price span{font-size:14px;font-weight:500;color:var(--c-text-3);margin-left:6px;letter-spacing:0}
.plan-feats{list-style:none;margin:22px 0 26px;padding:0;display:grid;gap:11px}
.plan-feats li{display:flex;gap:10px;font-size:15px;color:var(--c-text-2);margin:0}
.plan-feats svg{width:17px;height:17px;color:var(--c-accent);flex:0 0 auto;margin-top:4px}
.plan .btn{margin-top:auto}
.plan-note{text-align:center;font-size:12px;color:var(--c-text-3);margin:24px 0 0}

/* ============================================================
   FAQ
   ============================================================ */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-aside h2{margin-bottom:14px}
.faq-aside .lead{margin-bottom:24px}
.faq-list{display:flex;flex-direction:column}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-item:first-child{border-top:1px solid var(--c-line)}
.faq-q{margin:0}
.faq-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 4px;text-align:left;font-size:17px;font-weight:700;line-height:1.6;
  color:var(--c-text);transition:color var(--ease);
}
.faq-btn:hover{color:var(--c-accent)}
.faq-icon{
  position:relative;width:20px;height:20px;flex:0 0 20px;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  background:var(--c-accent);border-radius:2px;transition:transform var(--ease),opacity var(--ease);
}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-btn[aria-expanded="true"] .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{
  padding:0 4px 22px;font-size:15px;line-height:1.9;color:var(--c-text-2);
  background:transparent;
}
.faq-a[hidden]{display:none}
.faq-a p:last-child{margin-bottom:0}

/* ============================================================
   底部 CTA
   ============================================================ */
.final-cta{
  background:rgba(109,59,245,.12);border:1px solid rgba(109,59,245,.5);
  border-radius:24px;padding:48px 40px;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:16px;
}
.final-cta h2{max-width:22em;margin:0}
.final-cta p{color:var(--c-text-2);font-size:16px;margin:0;max-width:38em}
.final-cta .btn{margin-top:8px}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{background:var(--c-bg-2);border-top:1px solid var(--c-line);padding:64px 0 0;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
.footer-col h4{font-size:14px;font-weight:700;letter-spacing:.04em;color:var(--c-text);margin-bottom:18px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--c-text-2);margin-bottom:0}
.footer-links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px}
.footer-links li{margin:0}
.footer-links a,.footer-text{
  font-size:15px;color:var(--c-text-2);display:inline-block;
  transition:color var(--ease),transform var(--ease);
}
.footer-links a:hover{color:var(--c-accent);transform:translateX(2px)}
.footer-text{color:var(--c-text-3);font-size:14px;line-height:1.75;display:block}
.footer-form{display:flex;gap:10px;margin-top:14px}
.footer-form input{
  flex:1 1 auto;min-width:0;background:var(--c-panel);border:1px solid var(--c-line);
  border-radius:var(--r-input);padding:11px 14px;color:var(--c-text);font-size:14px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.footer-form input::placeholder{color:var(--c-text-3)}
.footer-form input:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(47,227,192,.3);
}
.footer-bottom{
  margin-top:56px;border-top:1px solid var(--c-line);padding:22px 0;
  text-align:center;font-size:13px;color:var(--c-text-3);line-height:1.8;
}
.footer-bottom a{color:var(--c-text-3)}
.footer-bottom a:hover{color:var(--c-accent)}

/* ============================================================
   浮动 CTA
   ============================================================ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:100;
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta.is-hidden{opacity:0;visibility:hidden}
.float-cta .btn{height:52px;box-shadow:var(--sh-float)}
.mobile-bar{display:none}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1439px){
  .container-wide{max-width:1120px}
}
@media (max-width:1199px){
  .section{padding:80px 0}
}
@media (max-width:991px){
  .topbar{display:flex}
  .sidebar{
    transform:translateX(-100%);transition:transform var(--ease);
    width:280px;padding-top:0;box-shadow:var(--sh-float);
  }
  .sidebar.is-open{transform:translateX(0)}
  .sidebar-top{padding-top:18px}
  .main{margin-left:0;padding-top:var(--topbar-h)}
  .hero{min-height:auto;padding:56px 0 48px}
  .hero-inner{gap:32px}
  .selling-grid{grid-template-columns:repeat(2,1fr)}
  .sell-lg{grid-column:span 2}
  .steps{grid-template-columns:repeat(2,1fr);gap:32px 0}
  .step:nth-child(2)::before{display:none}
  .demo-lower{grid-template-columns:1fr}
  .proof-top{grid-template-columns:1fr;gap:28px}
  .quotes{grid-template-columns:1fr;gap:0;padding-top:8px}
  .quote{border-left:0;border-top:1px solid var(--c-line);padding:26px 0}
  .quote:first-child{border-top:0;padding-top:0}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .plans{grid-template-columns:1fr;gap:20px}
  .plan.featured{transform:none;margin:0}
  .plan.featured:hover{transform:translateY(-2px)}
  .faq-layout{grid-template-columns:1fr;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:72px 0}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .main-inner{padding:0 18px}
  .section{padding:56px 0}
  .section-head{margin-bottom:24px}
  .hero h1{font-size:clamp(28px,8vw,40px)}
  .hero-sub{font-size:16px}
  .hero-actions{gap:10px}
  .hero-actions .btn{flex:1 1 100%}
  .hero-trust{gap:12px 20px}
  .selling-grid{grid-template-columns:1fr}
  .sell-lg{grid-column:span 1;padding:24px}
  .steps{grid-template-columns:1fr;gap:0}
  .step{padding:0 0 28px 26px;border-left:2px solid rgba(109,59,245,.45)}
  .step:last-child{border-left-color:transparent;padding-bottom:0}
  .step::before{
    top:6px;left:-7px;right:auto;width:12px;height:12px;border-radius:50%;
    background:var(--c-accent);border:2px solid var(--c-bg);
  }
  .step:last-child::before{display:block;background:var(--c-line-strong)}
  .news-grid{grid-template-columns:1fr}
  .news-head{flex-direction:column;align-items:flex-start;gap:12px}
  .stat{padding:20px 18px}
  .stat-num{font-size:32px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .paper-panel{padding:22px}
  .final-cta{padding:32px 22px}
  .float-cta{display:none}
  .mobile-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;height:64px;z-index:100;
    background:rgba(10,9,22,.96);backdrop-filter:blur(10px);
    border-top:1px solid var(--c-line);align-items:center;gap:12px;padding:0 14px;
    transition:transform var(--ease),opacity var(--ease);
  }
  .mobile-bar .btn{flex:1 1 auto;height:44px;padding:0 18px}
  .mobile-bar .bar-link{font-size:13px;color:var(--c-text-2);white-space:nowrap}
  .mobile-bar.is-hidden{transform:translateY(110%);opacity:0}
  .site-footer{padding-bottom:64px}
  .footer-form{flex-direction:column}
  .footer-form .btn{width:100%}
}
@media (max-width:519px){
  h2{font-size:24px}
  .hero h1{font-size:27px}
  .step-num{font-size:32px}
  .quote p{font-size:14px}
  .news-body{padding:16px}
  .plan{padding:26px 20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --c-bg:#0E0D1A;
  --c-bg-2:#0A0916;
  --c-panel:#171633;
  --c-panel-2:#1E1C3A;
  --c-line:rgba(255,255,255,.08);
  --c-line-strong:rgba(255,255,255,.16);
  --c-primary:#6D3BF5;
  --c-primary-2:#8F6BFF;
  --c-accent:#2FE3C0;
  --c-cta:#FF7A2F;
  --c-cta-hover:#FF9256;
  --c-text:#F3F2FA;
  --c-text-2:#B4B1CC;
  --c-text-3:#7E7B99;
  --c-paper:#FBFAF7;
  --c-paper-text:#1B1A26;
  --c-paper-text-2:#4A4757;
  --c-paper-line:#E6E3DC;
  --r-card:18px;
  --r-btn:999px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.7);
  --ease:.28s cubic-bezier(.2,.7,.3,1);
  --sidebar-w:248px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Inter","DIN Alternate",system-ui,-apple-system,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-align:left;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;background:none;}
button,input{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul{list-style:none;padding:0;}
::selection{background:rgba(109,59,245,.4);color:#fff;}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px;}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--c-cta);color:#17110A;padding:10px 18px;border-radius:0 0 10px 0;font-weight:700;
}
.skip-link:focus{left:0;}

/* ============ 布局骨架 ============ */
.app-main{
  margin-left:var(--sidebar-w);
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.container-main{
  width:100%;
  max-width:1120px;
  margin:0 auto;
  padding:0 32px;
}
.container-wide{
  width:100%;
  max-width:1120px;
  margin:0 auto;
  padding:0 32px;
}

/* ============ 左侧导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--c-bg-2);
  border-right:1px solid var(--c-line);
  display:flex;flex-direction:column;
  padding:0 14px;
  z-index:60;
}
.sidebar .brand{
  height:88px;
  display:flex;align-items:center;gap:10px;
  padding:0 8px;
  flex:0 0 auto;
}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;
  border-radius:10px;
  background:linear-gradient(140deg,var(--c-primary),#3B1CA8);
  display:grid;place-items:center;
  box-shadow:0 8px 22px -12px rgba(109,59,245,.9);
}
.brand-mark svg{width:20px;height:20px;display:block;}
.brand-text{
  display:flex;flex-direction:column;
  font-size:14px;font-weight:700;line-height:1.3;letter-spacing:.01em;
  color:var(--c-text);
}
.brand-sub{
  font-size:11px;font-weight:400;
  color:var(--c-text-3);letter-spacing:.04em;margin-top:2px;
}

.side-nav{display:flex;flex-direction:column;gap:4px;margin-top:6px;}
.side-link{
  position:relative;
  display:flex;align-items:center;
  height:46px;padding:0 12px;
  border-radius:0 10px 10px 0;
  font-size:14px;font-weight:600;
  color:var(--c-text-2);
  transition:var(--ease);
}
.side-link::before{
  content:"";position:absolute;left:-14px;top:50%;
  width:3px;height:0;background:var(--c-primary);
  transform:translateY(-50%);
  transition:height var(--ease);
  border-radius:0 3px 3px 0;
}
.side-link:hover,.side-link.active{
  background:rgba(109,59,245,.12);
  color:var(--c-text);
}
.side-link:hover::before,.side-link.active::before{height:24px;}

.side-foot{
  margin-top:auto;
  padding:18px 4px 22px;
  border-top:1px solid var(--c-line);
}
.side-foot .btn{width:100%;justify-content:center;margin-bottom:14px;}
.side-note{font-size:12px;line-height:1.7;color:var(--c-text-3);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;
  border-radius:999px;
  font-size:15px;font-weight:700;
  border:1px solid transparent;
  cursor:pointer;
  transition:var(--ease);
  white-space:nowrap;
}
.btn-cta{
  background:var(--c-cta);color:#17110A;
  box-shadow:0 16px 34px -20px rgba(255,122,47,.9);
}
.btn-cta:hover{background:var(--c-cta-hover);transform:translateY(-2px);}
.btn-cta:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.25);}
.btn-ghost{
  background:transparent;color:var(--c-primary-2);
  border-color:rgba(109,59,245,.55);
}
.btn-ghost:hover{background:rgba(109,59,245,.12);color:var(--c-text);border-color:var(--c-primary);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}

/* ============ 顶部移动栏 ============ */
.topbar{display:none;}
.burger{
  width:40px;height:40px;flex:0 0 40px;
  border:1px solid var(--c-line-strong);
  background:transparent;border-radius:10px;
  display:grid;place-items:center;cursor:pointer;
  transition:var(--ease);
}
.burger:hover{background:rgba(109,59,245,.14);}
.burger span{display:block;width:16px;height:2px;background:var(--c-text);border-radius:2px;position:relative;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--c-text);border-radius:2px;
}
.burger span::before{top:-5px;}
.burger span::after{top:5px;}

.scrim{
  position:fixed;inset:0;background:rgba(0,0,0,.6);
  z-index:55;opacity:0;pointer-events:none;
  transition:opacity var(--ease);
}
.scrim.on{opacity:1;pointer-events:auto;}

/* ============ 阅读进度条 ============ */
.read-progress{
  position:fixed;top:0;left:0;
  height:2px;width:0;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent));
  z-index:90;
}

/* ============ 面包屑 ============ */
.crumbs{
  display:flex;align-items:center;gap:8px;
  padding:26px 0 0;
  font-size:13px;color:var(--c-text-3);
  overflow:hidden;
}
.crumbs a{color:var(--c-text-2);transition:var(--ease);flex:0 0 auto;}
.crumbs a:hover{color:var(--c-accent);}
.crumb-sep{color:var(--c-text-3);flex:0 0 auto;}
.crumb-cur{
  flex:1 1 auto;min-width:0;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* ============ 文章头 ============ */
.post-head{padding:22px 0 30px;border-bottom:1px solid var(--c-line);}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.06em;
  background:rgba(47,227,192,.12);color:var(--c-accent);
  transition:var(--ease);
}
a.badge:hover{background:rgba(47,227,192,.22);}
.post-head h1{
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.24;font-weight:800;letter-spacing:-.01em;
  margin-top:16px;
  max-width:900px;
}
.post-intro{
  margin-top:16px;max-width:820px;
  font-size:16px;line-height:1.85;color:var(--c-text-2);
}
.post-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  margin-top:22px;
  font-size:13px;color:var(--c-text-3);
}
.post-meta .mi{display:inline-flex;align-items:center;gap:6px;}
.post-meta svg{width:14px;height:14px;stroke:var(--c-accent);fill:none;stroke-width:1.8;flex:0 0 14px;}
.meta-sep{width:1px;height:12px;background:var(--c-line-strong);}

/* ============ 封面 ============ */
.post-cover{
  margin-top:30px;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--c-line);
  aspect-ratio:16/9;
  background:var(--c-panel-2);
}
.post-cover img{width:100%;height:100%;object-fit:cover;}

/* ============ 正文纸面 ============ */
.paper{
  background:var(--c-paper);
  color:var(--c-paper-text);
  border-radius:20px;
  padding:48px;
  margin-top:24px;
  box-shadow:var(--shadow-card);
}
.post-body{font-size:17px;line-height:1.95;text-align:left;}
.post-body > *:first-child{margin-top:0;}
.post-body p{margin:0 0 1.2em;color:var(--c-paper-text);}
.post-body h2{
  position:relative;
  font-size:clamp(22px,2.4vw,28px);
  line-height:1.36;font-weight:800;
  color:#141326;
  margin:40px 0 16px;
  padding-left:14px;
}
.post-body h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;
  width:3px;background:var(--c-primary);border-radius:2px;
}
.post-body h3{
  font-size:24px;line-height:1.4;font-weight:700;
  color:#141326;margin:32px 0 12px;
}
.post-body h4{
  font-size:18px;line-height:1.5;font-weight:700;
  color:#1E1C33;margin:24px 0 10px;
}
.post-body ul,.post-body ol{margin:0 0 1.2em;padding-left:0;}
.post-body li{
  position:relative;
  padding-left:22px;
  margin-bottom:.5em;
  color:var(--c-paper-text);
}
.post-body li::before{
  content:"";position:absolute;left:4px;top:.72em;
  width:7px;height:7px;border-radius:2px;background:var(--c-primary);
}
.post-body ol{list-style:decimal;padding-left:1.4em;}
.post-body ol li{padding-left:6px;}
.post-body ol li::before{display:none;}
.post-body blockquote{
  margin:24px 0;padding:14px 20px;
  border-left:4px solid var(--c-accent);
  background:#F1F7F5;
  color:var(--c-paper-text-2);
  border-radius:0 12px 12px 0;
}
.post-body blockquote p:last-child{margin-bottom:0;}
.post-body a{color:#0E8F79;text-decoration:underline;text-underline-offset:3px;}
.post-body a:hover{color:var(--c-primary);}
.post-body img{border-radius:14px;margin:24px auto;border:1px solid var(--c-paper-line);}
.post-body figure{margin:24px 0;}
.post-body figcaption{
  text-align:center;font-size:13px;color:var(--c-paper-text-2);margin-top:10px;
}
.post-body table{
  width:100%;border-collapse:collapse;margin:24px 0;
  font-size:15px;border:1px solid var(--c-paper-line);
  display:block;overflow-x:auto;
}
.post-body th,.post-body td{
  border:1px solid var(--c-paper-line);padding:10px 14px;text-align:left;
}
.post-body th{background:#F1EFE9;font-weight:700;}
.post-body hr{border:none;border-top:1px solid var(--c-paper-line);margin:32px 0;}
.post-body code{
  background:#EFECE5;padding:2px 6px;border-radius:6px;
  font-family:var(--font-num);font-size:15px;
}

/* ============ 空态 ============ */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:18px;text-align:center;
  padding:64px 24px;
  margin-top:24px;
  border:1px dashed var(--c-line-strong);
  border-radius:var(--r-card);
  background:var(--c-panel);
}
.empty-state svg{width:96px;height:96px;stroke:rgba(109,59,245,.4);fill:none;stroke-width:1.4;}
.empty-state p{font-size:16px;color:var(--c-text-2);}

/* ============ 标签与操作 ============ */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  border-radius:999px;font-size:13px;
  background:rgba(255,255,255,.06);
  border:1px solid var(--c-line);
  color:var(--c-text-2);
  transition:var(--ease);
}
.tag:hover{border-color:rgba(109,59,245,.5);color:var(--c-text);}
.post-actions{
  display:flex;flex-wrap:wrap;gap:14px;
  margin-top:28px;padding-top:26px;
  border-top:1px solid var(--c-line);
}

/* ============ 通用区块 ============ */
.section{padding:64px 0 0;}
.section-head{margin-bottom:32px;}
.section-title{
  font-size:clamp(24px,3vw,32px);
  line-height:1.3;font-weight:800;letter-spacing:-.01em;
}
.section-desc{margin-top:12px;font-size:15px;color:var(--c-text-2);max-width:760px;}

/* ============ FAQ ============ */
.faq-list{
  margin-top:26px;
  border-top:1px solid var(--c-line);
  max-width:900px;
}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 4px;
  cursor:pointer;list-style:none;
  font-size:17px;font-weight:700;line-height:1.6;
  color:var(--c-text);
  transition:var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";flex:0 0 14px;
  width:14px;height:14px;
  border-right:2px solid var(--c-accent);
  border-bottom:2px solid var(--c-accent);
  transform:rotate(45deg);
  transition:transform var(--ease);
}
.faq-item[open] summary::after{transform:rotate(-135deg);}
.faq-item summary:hover{color:var(--c-primary-2);}
.faq-body{
  padding:4px 4px 22px;
  font-size:15px;line-height:1.85;color:var(--c-text-2);
  background:linear-gradient(180deg,rgba(23,22,51,.5),transparent);
}
.faq-body p{margin:0 0 .8em;}
.faq-body p:last-child{margin-bottom:0;}

/* ============ 底部 CTA ============ */
.cta-band{
  margin-top:64px;
  padding:40px;
  border-radius:22px;
  background:rgba(109,59,245,.12);
  border:1px solid rgba(109,59,245,.45);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);line-height:1.32;font-weight:800;}
.cta-band p{margin-top:10px;font-size:15px;color:var(--c-text-2);max-width:560px;}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:50;
  display:inline-flex;align-items:center;gap:8px;
  height:52px;padding:0 22px;
  border-radius:999px;
  background:var(--c-cta);color:#17110A;
  font-size:15px;font-weight:700;
  box-shadow:0 18px 40px -18px rgba(255,122,47,.8);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:var(--ease);
}
.float-cta svg{width:18px;height:18px;stroke:#17110A;fill:none;stroke-width:2;}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta:hover{background:var(--c-cta-hover);transform:translateY(-2px);}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:80px;
  background:var(--c-bg-2);
  border-top:1px solid var(--c-line);
  padding:64px 0 24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.35fr;
  gap:32px;
}
.footer-col h4{
  font-size:15px;font-weight:700;margin-bottom:16px;color:var(--c-text);
}
.footer-brand .brand{margin-bottom:16px;display:flex;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--c-text-2);}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{
  display:inline-block;
  font-size:15px;color:var(--c-text-2);
  transition:var(--ease);
}
.footer-links a:hover{color:var(--c-accent);transform:translateX(2px);}
.footer-text{display:block;font-size:14px;color:var(--c-text-2);margin-bottom:8px;}
.footer-form{display:flex;gap:8px;margin-top:12px;}
.footer-form input{
  flex:1;min-width:0;height:44px;padding:0 14px;
  border-radius:10px;
  background:var(--c-panel);
  border:1px solid var(--c-line);
  color:var(--c-text);font-size:14px;
  transition:var(--ease);
}
.footer-form input::placeholder{color:var(--c-text-3);}
.footer-form input:focus{
  outline:none;border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(47,227,192,.18);
}
.footer-form .btn{height:44px;padding:0 18px;font-size:14px;}
.footer-bottom{
  margin-top:40px;padding-top:20px;
  border-top:1px solid var(--c-line);
  text-align:center;font-size:13px;color:var(--c-text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .paper{padding:38px;}
}
@media (max-width:991px){
  .topbar{
    display:flex;position:fixed;top:0;left:0;right:0;
    height:56px;align-items:center;justify-content:space-between;
    padding:0 16px;
    background:rgba(10,9,22,.94);
    border-bottom:1px solid var(--c-line);
    z-index:70;
  }
  .topbar .brand-text{font-size:14px;}
  .topbar .brand-mark{width:30px;height:30px;flex:0 0 30px;border-radius:9px;}
  .sidebar{
    width:280px;
    transform:translateX(-100%);
    transition:transform .3s cubic-bezier(.2,.7,.3,1);
    z-index:75;
  }
  .sidebar.open{transform:translateX(0);}
  .app-main{margin-left:0;padding-top:56px;}
  .container-main,.container-wide{padding:0 20px;}
  .section{padding:52px 0 0;}
  .paper{padding:30px;border-radius:16px;}
  .post-body{font-size:16.5px;}
  .cta-band{padding:30px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:640px){
  body{padding-bottom:74px;}
  .container-main,.container-wide{padding:0 16px;}
  .crumbs{padding-top:18px;}
  .post-head{padding:18px 0 24px;}
  .post-head h1{font-size:26px;}
  .post-intro{font-size:15px;}
  .post-meta{gap:10px;font-size:12px;}
  .paper{padding:22px;border-radius:14px;}
  .post-body{font-size:16px;line-height:1.9;}
  .post-body h2{font-size:21px;margin-top:32px;}
  .post-body h3{font-size:19px;}
  .section{padding:44px 0 0;}
  .faq-item summary{font-size:15.5px;padding:16px 2px;}
  .cta-band{padding:24px;border-radius:18px;}
  .cta-band .btn{width:100%;}
  .float-cta{
    left:0;right:0;bottom:0;height:64px;
    border-radius:0;justify-content:center;font-size:16px;
  }
  .footer-grid{grid-template-columns:1fr;}
  .footer-form{flex-direction:column;}
  .footer-form .btn{width:100%;}
  .post-actions .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
  .float-cta.show{transform:none;}
  .float-cta:hover{transform:none;}
}

/* roulang page: category1 */
:root{
  --c-bg:#0E0D1A;
  --c-bg-2:#0A0916;
  --c-panel:#171633;
  --c-panel-2:#1E1C3A;
  --c-line:rgba(255,255,255,.08);
  --c-line-strong:rgba(255,255,255,.16);
  --c-primary:#6D3BF5;
  --c-primary-2:#8F6BFF;
  --c-accent:#2FE3C0;
  --c-cta:#FF7A2F;
  --c-cta-hover:#FF9256;
  --c-text:#F3F2FA;
  --c-text-2:#B4B1CC;
  --c-text-3:#7E7B99;
  --c-paper:#FBFAF7;
  --c-paper-text:#1B1A26;
  --c-paper-text-2:#4A4757;
  --c-paper-line:#E6E3DC;
  --r-card:18px;
  --r-img:14px;
  --r-input:10px;
  --sh-card:0 18px 40px -24px rgba(0,0,0,.7), inset 0 1px 0 rgba(255,255,255,.04);
  --sh-float:0 24px 60px -28px rgba(0,0,0,.85);
  --tr:.28s cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Inter","DIN Alternate",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.nav-locked{overflow:hidden}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
h1,h2,h3,h4{margin:0;color:var(--c-text);letter-spacing:-.01em}
h1{font-size:clamp(34px,5vw,60px);line-height:1.18;font-weight:800}
h2{font-size:clamp(26px,3.4vw,40px);line-height:1.24;font-weight:800}
h3{font-size:22px;line-height:1.4;font-weight:700}
h4{font-size:18px;line-height:1.5;font-weight:700}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul{margin:0 0 1em;padding-left:1.1em}
li{margin-bottom:.5em}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--c-primary);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;
}
.skip-link:focus{left:0}
.container{width:100%;max-width:1120px;margin:0 auto;padding:0 32px}
.container-wide{width:100%;max-width:1280px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section-tight{padding:64px 0}
.section-head{max-width:760px;margin-bottom:32px}
.section-head p{color:var(--c-text-2);font-size:16px;margin-top:14px;margin-bottom:0}
.eyebrow{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.06em;
  background:rgba(47,227,192,.12);color:var(--c-accent);margin-bottom:18px;
}
.eyebrow.is-primary{background:rgba(109,59,245,.16);color:var(--c-primary-2)}

/* ---------- 顶部移动栏 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:80;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:rgba(10,9,22,.94);border-bottom:1px solid var(--c-line);
  backdrop-filter:blur(8px);
}
.brand{display:inline-flex;align-items:center;gap:10px;min-width:0}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;
  background:linear-gradient(140deg,var(--c-primary),#3A1E9E);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 8px 20px -12px rgba(109,59,245,.9);
}
.brand-mark svg{width:22px;height:22px}
.brand-text{font-size:15px;font-weight:700;line-height:1.3;color:var(--c-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-sub{display:block;font-size:11px;font-weight:500;color:var(--c-text-3);letter-spacing:.02em}
.burger{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line-strong);
  background:rgba(255,255,255,.04);display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;transition:var(--tr);flex:0 0 42px;
}
.burger:hover{background:rgba(109,59,245,.18)}
.burger span,.burger span::before,.burger span::after{
  content:"";display:block;width:18px;height:2px;border-radius:2px;background:var(--c-text);
  position:relative;transition:var(--tr);
}
.burger span::before{position:absolute;top:-6px;left:0}
.burger span::after{position:absolute;top:6px;left:0}

/* ---------- 左侧导航 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:248px;z-index:90;
  background:var(--c-bg-2);border-right:1px solid var(--c-line);
  display:flex;flex-direction:column;transition:transform var(--tr);
}
.sidebar-head{
  height:88px;display:flex;align-items:center;padding:0 20px;border-bottom:1px solid var(--c-line);
}
.side-nav{padding:18px 12px;display:flex;flex-direction:column;gap:4px;flex:1 1 auto;overflow-y:auto}
.side-nav-label{
  font-size:11px;letter-spacing:.14em;color:var(--c-text-3);padding:6px 12px 10px;text-transform:none;
}
.side-link{
  display:flex;align-items:center;gap:10px;height:48px;padding:0 12px;border-radius:10px;
  font-size:14px;font-weight:600;color:var(--c-text-2);position:relative;transition:var(--tr);
  border-left:3px solid transparent;
}
.side-link svg{width:18px;height:18px;flex:0 0 18px;stroke:currentColor}
.side-link:hover{background:rgba(109,59,245,.12);color:var(--c-text);border-left-color:var(--c-primary)}
.side-link.is-active{background:rgba(109,59,245,.14);color:var(--c-text);border-left-color:var(--c-primary)}
.sidebar-foot{padding:18px 16px 22px;border-top:1px solid var(--c-line)}
.foot-note{font-size:12px;color:var(--c-text-3);margin:10px 0 0;line-height:1.6}

/* ---------- 抽屉遮罩 ---------- */
.scrim{
  position:fixed;inset:0;background:rgba(0,0,0,.6);opacity:0;pointer-events:none;
  transition:opacity var(--tr);z-index:85;
}
.scrim.is-on{opacity:1;pointer-events:auto}

/* ---------- 主内容区 ---------- */
.page-main{padding-top:0}
@media (min-width:992px){
  body{padding-left:248px}
}
@media (max-width:991px){
  .topbar{display:flex}
  .sidebar{transform:translateX(-100%);width:280px;box-shadow:var(--sh-float)}
  .sidebar.is-open{transform:none}
  .page-main{padding-top:56px}
  .sidebar-head{height:66px}
}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:24px 0 0}
.breadcrumb ol{
  list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin:0;padding:0;font-size:13px;color:var(--c-text-3);
}
.breadcrumb li{display:flex;align-items:center;gap:8px;margin:0}
.breadcrumb a{color:var(--c-text-2);transition:var(--tr)}
.breadcrumb a:hover{color:var(--c-accent)}
.breadcrumb li::after{content:"/";color:var(--c-text-3);opacity:.6}
.breadcrumb li:last-child::after{content:""}
.breadcrumb .current{color:var(--c-text-3);max-width:280px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;font-family:inherit;
  transition:transform var(--tr),background var(--tr),border-color var(--tr),filter var(--tr),box-shadow var(--tr);
}
.btn svg{width:18px;height:18px}
.btn-cta{background:var(--c-cta);color:#17110A}
.btn-cta:hover{background:var(--c-cta-hover);transform:translateY(-2px);filter:brightness(1.06)}
.btn-cta:active{transform:none;box-shadow:inset 0 3px 10px rgba(0,0,0,.25)}
.btn-ghost{background:transparent;border-color:rgba(109,59,245,.55);color:var(--c-primary-2)}
.btn-ghost:hover{background:rgba(109,59,245,.12);transform:translateY(-2px)}
.btn-ghost:active{transform:none;box-shadow:inset 0 3px 10px rgba(0,0,0,.25)}
.btn-line{background:transparent;border-color:var(--c-line-strong);color:var(--c-text-2)}
.btn-line:hover{border-color:rgba(47,227,192,.5);color:var(--c-text);transform:translateY(-2px)}
.btn-block{width:100%}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}

/* ---------- Hero ---------- */
.hero{position:relative;padding:56px 0 88px;overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-180px;right:-120px;width:60vw;max-width:760px;height:760px;
  background:radial-gradient(circle at 50% 50%,rgba(109,59,245,.42),rgba(109,59,245,0) 68%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(to right,rgba(255,255,255,.04) 1px,transparent 1px),
                   linear-gradient(to bottom,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:40px 40px;
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.55),transparent 78%);
}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero h1{margin-bottom:18px}
.hero-sub{font-size:18px;color:var(--c-text-2);max-width:560px}
.hero-trust{display:flex;flex-wrap:wrap;gap:28px;margin-top:36px}
.trust-item{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--c-text-2)}
.trust-item svg{width:20px;height:20px;flex:0 0 20px;stroke:var(--c-accent)}
.hero-media{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--c-line-strong);box-shadow:var(--sh-card);
}
.hero-media img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover;border-radius:0}
.hero-media::after{
  content:"";position:absolute;inset:0;background:linear-gradient(150deg,rgba(109,59,245,.32),rgba(14,13,26,.12));
}

/* ---------- 时间线 ---------- */
.timeline{position:relative;padding-left:34px;margin-top:40px}
.timeline::before{
  content:"";position:absolute;left:11px;top:10px;bottom:14px;width:2px;
  background:linear-gradient(to bottom,rgba(47,227,192,.55),rgba(47,227,192,.12));
}
.tl-item{position:relative;padding-bottom:36px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-30px;top:7px;width:12px;height:12px;border-radius:50%;
  background:var(--c-bg);border:2px solid var(--c-accent);
}
.tl-num{font-family:var(--font-num);font-size:34px;font-weight:800;color:var(--c-accent);line-height:1}
.tl-item h3{margin:8px 0 8px}
.tl-item p{color:var(--c-text-2);font-size:15px;margin:0;max-width:720px}

/* ---------- 卡片 ---------- */
.card{
  background:var(--c-panel-2);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-card);transition:transform var(--tr),border-color var(--tr);height:100%;
}
.card:hover{border-color:rgba(109,59,245,.4);transform:translateY(-2px)}
.card h3{margin-bottom:10px}
.card p{color:var(--c-text-2);font-size:15px;margin:0}
.card-icon{
  width:42px;height:42px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:rgba(109,59,245,.14);margin-bottom:16px;
}
.card-icon svg{width:22px;height:22px;stroke:var(--c-primary-2)}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card-grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}

/* 横向大卡 */
.feature-wide{
  display:grid;grid-template-columns:5fr 6fr;gap:0;overflow:hidden;
  background:var(--c-panel-2);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);margin-bottom:24px;
}
.feature-wide .fw-media{position:relative;min-height:280px}
.feature-wide .fw-media img{width:100%;height:100%;object-fit:cover;border-radius:0;position:absolute;inset:0}
.feature-wide .fw-body{padding:36px}
.feature-wide h3{margin-bottom:12px}
.feature-wide p{color:var(--c-text-2);font-size:15px}
.point-list{list-style:none;padding:0;margin:16px 0 0}
.point-list li{
  position:relative;padding-left:24px;font-size:15px;color:var(--c-text-2);margin-bottom:10px;
}
.point-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:var(--c-primary-2);
}
.point-list.is-accent li::before{background:var(--c-accent)}

/* ---------- 浅纸阅读区 ---------- */
.paper{
  background:var(--c-paper);color:var(--c-paper-text);border-radius:20px;
  padding:48px;box-shadow:0 30px 60px -40px rgba(0,0,0,.85);
}
.paper h2,.paper h3{color:var(--c-paper-text)}
.paper p{color:var(--c-paper-text-2);font-size:17px;line-height:1.95}
.paper .point-list li{color:var(--c-paper-text-2);font-size:16px}
.paper .point-list li::before{background:var(--c-primary)}
.paper-split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin-top:28px}
.paper-split img{border:1px solid var(--c-paper-line);border-radius:var(--r-img);width:100%;aspect-ratio:4/3;object-fit:cover}
.split-reverse .paper-split-media{order:-1}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--c-line);border-radius:14px;margin-top:28px}
table.dt{width:100%;border-collapse:collapse;min-width:660px;font-size:15px}
table.dt th{
  background:rgba(109,59,245,.14);color:var(--c-text);text-align:left;padding:14px 18px;
  font-size:13px;font-weight:700;letter-spacing:.06em;white-space:nowrap;
}
table.dt td{padding:14px 18px;border-top:1px solid var(--c-line);color:var(--c-text-2);vertical-align:top}
table.dt tr:hover td{background:rgba(255,255,255,.02)}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-intro p{color:var(--c-text-2);font-size:16px;margin-top:16px}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--c-panel);border:1px solid var(--c-line);border-radius:14px;overflow:hidden;
  transition:border-color var(--tr);
}
.faq-item:hover{border-color:var(--c-line-strong)}
.faq-q{margin:0}
.faq-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:none;border:0;cursor:pointer;text-align:left;
  font-family:inherit;font-size:17px;font-weight:700;color:var(--c-text);line-height:1.6;
  transition:background var(--tr);
}
.faq-btn:hover{background:rgba(109,59,245,.08)}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 16px;transition:transform var(--tr)}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--c-accent);border-radius:2px;transition:opacity var(--tr);
}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{left:7px;top:0;width:2px;height:16px}
.faq-btn[aria-expanded="true"] .faq-icon{transform:rotate(90deg)}
.faq-btn[aria-expanded="true"] .faq-icon::after{opacity:0}
.faq-a{padding:0 20px 18px;border-top:1px solid var(--c-line);color:var(--c-text-2);font-size:15px;line-height:1.8}
.faq-a p{margin:14px 0 0}

/* ---------- CTA 宽带 ---------- */
.cta-band{
  background:rgba(109,59,245,.12);border:1px solid rgba(109,59,245,.45);border-radius:24px;
  padding:48px 40px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(24px,2.8vw,34px);margin-bottom:10px}
.cta-band p{color:var(--c-text-2);font-size:16px;margin:0;max-width:620px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-bg-2);border-top:1px solid var(--c-line);padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:32px}
.footer-col h4{font-size:15px;margin-bottom:18px;color:var(--c-text)}
.footer-brand p{color:var(--c-text-2);font-size:14px;line-height:1.8;margin:18px 0 0;max-width:340px}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin-bottom:12px}
.footer-links a{font-size:15px;color:var(--c-text-2);display:inline-block;transition:var(--tr)}
.footer-links a:hover{color:var(--c-accent);transform:translateX(2px)}
.footer-text{display:block;font-size:14px;color:var(--c-text-2);margin-bottom:10px}
.footer-form{margin-top:14px;display:flex;gap:10px}
.footer-form input{
  flex:1 1 auto;min-width:0;height:44px;padding:0 14px;border-radius:var(--r-input);
  background:var(--c-panel);border:1px solid var(--c-line);color:var(--c-text);font-family:inherit;font-size:14px;
  transition:var(--tr);
}
.footer-form input::placeholder{color:var(--c-text-3)}
.footer-form input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(47,227,192,.35)}
.footer-form .btn{height:44px;padding:0 18px;font-size:14px;flex:0 0 auto}
.footer-bottom{
  margin-top:56px;border-top:1px solid var(--c-line);padding:22px 0 26px;text-align:center;
}
.footer-bottom p{margin:0;font-size:13px;color:var(--c-text-3)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .hero-grid{gap:36px}
}
@media (max-width:991px){
  .section{padding:72px 0}
  .container,.container-wide{padding:0 24px}
  .hero{padding:40px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-media img{aspect-ratio:16/9}
  .feature-wide{grid-template-columns:1fr}
  .feature-wide .fw-media{min-height:220px;position:relative}
  .paper{padding:32px}
  .paper-split{grid-template-columns:1fr;gap:24px}
  .split-reverse .paper-split-media{order:0}
  .faq-layout{grid-template-columns:1fr;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .card-grid{grid-template-columns:1fr}
  .card-grid-2{grid-template-columns:1fr}
  .feature-wide .fw-body{padding:24px}
  .cta-band{padding:32px 24px;text-align:left}
  .hero-trust{gap:18px}
}
@media (max-width:520px){
  .container,.container-wide{padding:0 18px}
  .section{padding:56px 0}
  .paper{padding:22px;border-radius:16px}
  .footer-grid{grid-template-columns:1fr}
  .footer-form{flex-direction:column}
  .footer-form .btn{width:100%}
  .btn{width:100%}
  .btn-row .btn{width:100%}
  .hero-trust{flex-direction:column;gap:12px}
  .breadcrumb .current{max-width:180px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .card:hover,.btn:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --c-bg:#0E0D1A;
  --c-bg-2:#0A0916;
  --c-panel:#171633;
  --c-panel-2:#1E1C3A;
  --c-line:rgba(255,255,255,.08);
  --c-line-strong:rgba(255,255,255,.16);
  --c-primary:#6D3BF5;
  --c-primary-2:#8F6BFF;
  --c-accent:#2FE3C0;
  --c-cta:#FF7A2F;
  --c-cta-hover:#FF9256;
  --c-text:#F3F2FA;
  --c-text-2:#B4B1CC;
  --c-text-3:#7E7B99;
  --c-paper:#FBFAF7;
  --c-paper-text:#1B1A26;
  --c-paper-text-2:#4A4757;
  --c-paper-line:#E6E3DC;
  --radius-card:18px;
  --radius-img:14px;
  --radius-input:10px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.7), inset 0 1px 0 rgba(255,255,255,.04);
  --shadow-float:0 24px 60px -28px rgba(0,0,0,.85);
  --ease:.28s cubic-bezier(.2,.7,.3,1);
  --nav-w:248px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Inter","DIN Alternate",system-ui,"PingFang SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
input{font:inherit}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--c-cta);color:#17110A;font-weight:700;
  padding:10px 18px;border-radius:0 0 10px 0;
}
.skip-link:focus{left:0}
.container-wide{width:100%;max-width:1280px;margin:0 auto;padding:0 32px}

/* ============ App Shell 布局 ============ */
.main{margin-left:var(--nav-w);min-height:100vh}

/* 侧边栏 */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
  background:var(--c-bg-2);
  border-right:1px solid var(--c-line);
  display:flex;flex-direction:column;
  padding:0 0 20px;
  overflow-y:auto;
  z-index:80;
}
.sidebar-brand{
  height:88px;display:flex;align-items:center;gap:12px;
  padding:0 20px;border-bottom:1px solid var(--c-line);flex:none;
}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:36px;height:36px;flex:none;border-radius:10px;
  background:linear-gradient(140deg,var(--c-primary),var(--c-primary-2));
  display:grid;place-items:center;
  box-shadow:0 8px 20px -12px rgba(109,59,245,.9);
}
.brand-mark svg{width:22px;height:22px}
.brand-text{font-size:15px;font-weight:700;line-height:1.25;letter-spacing:-.01em}
.brand-sub{display:block;font-size:11px;font-weight:500;color:var(--c-text-3);letter-spacing:.02em;margin-top:2px}
.sidebar-nav{flex:1;padding:14px 0}
.nav-label{
  display:block;padding:12px 20px 6px;
  font-size:11px;letter-spacing:.1em;color:var(--c-text-3);font-weight:600;
}
.nav-link{
  display:flex;align-items:center;gap:10px;
  height:48px;padding:0 20px;
  font-size:14px;font-weight:600;color:var(--c-text-2);
  border-left:3px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.nav-link:hover{background:rgba(109,59,245,.12);border-left-color:var(--c-primary);color:var(--c-text)}
.nav-link.is-active{background:rgba(109,59,245,.18);border-left-color:var(--c-primary);color:#fff}
.nav-anchor{
  display:flex;align-items:center;
  height:40px;padding:0 20px;
  font-size:13px;color:var(--c-text-3);
  border-left:3px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.nav-anchor:hover{background:rgba(109,59,245,.12);border-left-color:var(--c-primary);color:var(--c-text)}
.nav-anchor.is-current{background:rgba(109,59,245,.12);border-left-color:var(--c-primary);color:var(--c-text)}
.sidebar-foot{
  margin-top:auto;padding:18px 20px 0;flex:none;
  border-top:1px solid var(--c-line);
  display:flex;flex-direction:column;gap:10px;
}
.sidebar-note{font-size:12px;color:var(--c-text-3);line-height:1.6}

/* 顶部移动栏 */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:56px;
  align-items:center;justify-content:space-between;
  padding:0 16px;
  background:rgba(10,9,22,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
  z-index:90;
}
.topbar .brand-text{font-size:14px}
.topbar .brand-mark{width:30px;height:30px;border-radius:9px}
.topbar .brand-mark svg{width:18px;height:18px}
.burger{
  width:40px;height:40px;border:1px solid var(--c-line-strong);border-radius:10px;
  background:transparent;display:grid;place-items:center;cursor:pointer;
  transition:var(--ease);
}
.burger:hover{background:rgba(109,59,245,.18);border-color:var(--c-primary)}
.burger span,.burger span::before,.burger span::after{
  display:block;width:16px;height:2px;border-radius:2px;background:var(--c-text);
  content:"";position:relative;
}
.burger span::before{position:absolute;top:-5px;left:0}
.burger span::after{position:absolute;top:5px;left:0}
.scrim{
  position:fixed;inset:0;background:rgba(0,0,0,.6);
  opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);
  z-index:75;
}
.scrim.is-open{opacity:1;visibility:visible}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:999px;
  font-size:15px;font-weight:700;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:transform var(--ease),background var(--ease),border-color var(--ease),box-shadow var(--ease),color var(--ease);
}
.btn-cta{background:var(--c-cta);color:#17110A}
.btn-cta:hover{background:var(--c-cta-hover);transform:translateY(-2px)}
.btn-cta:active{transform:translateY(0);box-shadow:inset 0 2px 8px rgba(0,0,0,.28)}
.btn-ghost{background:transparent;border-color:var(--c-primary);color:var(--c-text)}
.btn-ghost:hover{background:rgba(109,59,245,.12);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-full{width:100%}
.btn[disabled]{opacity:.45;transform:none;cursor:not-allowed}

/* ============ 通用板块 ============ */
.section{padding:96px 0}
.section-head{max-width:780px;margin-bottom:32px}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;
  color:var(--c-accent);text-transform:uppercase;margin-bottom:12px;
}
.section-title{font-size:clamp(26px,3.4vw,40px);line-height:1.24}
.section-sub{margin-top:14px;font-size:16px;color:var(--c-text-2);max-width:720px}
.section-dark{background:var(--c-bg-2);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}

/* ============ 页面横幅 ============ */
.page-hero{position:relative;min-height:320px;overflow:hidden;border-bottom:1px solid var(--c-line)}
.page-hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,13,26,.42) 0%,rgba(14,13,26,.78) 48%,rgba(14,13,26,.97) 100%);
}
.page-hero-inner{position:relative;z-index:2;padding:72px 0 48px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);margin-bottom:18px}
.crumbs a{color:var(--c-text-2);transition:color var(--ease)}
.crumbs a:hover{color:var(--c-accent)}
.crumbs span.sep{color:var(--c-text-3)}
.crumbs .current{color:var(--c-text-3);max-width:60vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.page-hero h1{font-size:clamp(30px,4.2vw,52px);line-height:1.18;font-weight:800;max-width:900px}
.page-hero .lede{margin-top:18px;font-size:17px;color:var(--c-text-2);max-width:680px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-badges{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--c-text-2);
  padding:6px 14px;border:1px solid var(--c-line);border-radius:999px;
  background:rgba(23,22,51,.6);
}
.hero-badge svg{width:16px;height:16px;flex:none}

/* ============ 双列清单对比 ============ */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare-card{
  background:var(--c-panel);border:1px solid var(--c-line);
  border-radius:var(--radius-card);padding:32px;
  box-shadow:var(--shadow-card);
  transition:border-color var(--ease),transform var(--ease);
}
.compare-card:hover{border-color:rgba(109,59,245,.4);transform:translateY(-2px)}
.compare-card h3{font-size:20px;margin-bottom:6px}
.compare-card .hint{font-size:14px;color:var(--c-text-3);margin-bottom:18px}
.compare-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:13px 0;font-size:15px;color:var(--c-text-2);
  border-bottom:1px dashed var(--c-line);
  line-height:1.7;
}
.compare-list li:last-child{border-bottom:0}
.mark{
  flex:none;width:18px;height:18px;border-radius:6px;margin-top:4px;
  display:grid;place-items:center;font-size:11px;font-weight:800;font-family:var(--font-num);
}
.mark-warn{background:rgba(255,122,47,.16);color:var(--c-cta)}
.mark-ok{background:rgba(47,227,192,.14);color:var(--c-accent)}

/* 提示类型小卡 */
.tip-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(258px,1fr));gap:24px;margin-top:32px}
.tip-card{
  background:var(--c-panel-2);border:1px solid var(--c-line);
  border-radius:var(--radius-card);padding:26px;
  box-shadow:var(--shadow-card);
  transition:border-color var(--ease),transform var(--ease);
}
.tip-card:hover{border-color:rgba(109,59,245,.4);transform:translateY(-2px)}
.tip-card .tip-icon{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:rgba(109,59,245,.16);margin-bottom:16px;
}
.tip-card .tip-icon svg{width:22px;height:22px;stroke:var(--c-primary-2);fill:none;stroke-width:2}
.tip-card h3{font-size:17px;margin-bottom:8px}
.tip-card p{font-size:14.5px;color:var(--c-text-2);line-height:1.75}

/* ============ 纸底长文区 ============ */
.paper-wrap{padding:96px 0;background:var(--c-bg-2);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.paper{
  background:var(--c-paper);color:var(--c-paper-text);
  border-radius:20px;padding:48px;max-width:1040px;margin:0 auto;
  box-shadow:0 30px 70px -40px rgba(0,0,0,.85);
}
.paper h2{
  font-size:clamp(22px,2.4vw,27px);line-height:1.35;color:var(--c-paper-text);
  margin:44px 0 16px;padding-left:14px;border-left:3px solid var(--c-primary);
}
.paper h2:first-child{margin-top:0}
.paper p{font-size:17px;line-height:1.95;color:var(--c-paper-text-2);margin-bottom:1.2em}
.paper p:last-child{margin-bottom:0}
.paper .dot-list{margin:18px 0 4px}
.paper .dot-list li{
  position:relative;padding-left:22px;margin:10px 0;
  font-size:16px;line-height:1.85;color:var(--c-paper-text-2);
}
.paper .dot-list li::before{
  content:"";position:absolute;left:0;top:11px;
  width:8px;height:8px;border-radius:2px;background:var(--c-primary);
}
.paper .quote{
  margin:24px 0;padding:16px 20px;
  background:rgba(47,227,192,.09);
  border-left:4px solid var(--c-accent);
  border-radius:0 12px 12px 0;
  font-size:15.5px;color:var(--c-paper-text-2);
}

/* ============ 交错内容卡 ============ */
.card-stack{display:flex;flex-direction:column;gap:24px}
.card-wide{
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  gap:32px;align-items:center;
  background:var(--c-panel-2);border:1px solid var(--c-line);
  border-radius:var(--radius-card);padding:32px;
  box-shadow:var(--shadow-card);
  transition:border-color var(--ease),transform var(--ease);
}
.card-wide:hover{border-color:rgba(109,59,245,.4);transform:translateY(-2px)}
.card-duo{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.card{
  background:var(--c-panel-2);border:1px solid var(--c-line);
  border-radius:var(--radius-card);padding:24px;
  box-shadow:var(--shadow-card);
  transition:border-color var(--ease),transform var(--ease);
  display:flex;flex-direction:column;
}
.card:hover{border-color:rgba(109,59,245,.4);transform:translateY(-2px)}
.card-media{
  border-radius:var(--radius-img);overflow:hidden;
  border:1px solid var(--c-line);
  aspect-ratio:16/10;background:linear-gradient(140deg,rgba(109,59,245,.35),rgba(47,227,192,.22));
}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform var(--ease)}
.card:hover .card-media img,.card-wide:hover .card-media img{transform:scale(1.03)}
.card h3{font-size:19px;margin:18px 0 8px}
.card p{font-size:14.5px;color:var(--c-text-2);line-height:1.78}
.card-wide h3{font-size:22px;margin:0 0 10px}
.card-wide p{font-size:15px;color:var(--c-text-2);line-height:1.8}
.tag{
  display:inline-block;height:24px;line-height:24px;padding:0 12px;
  border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.04em;
  background:rgba(47,227,192,.14);color:var(--c-accent);
}
.tag-primary{background:rgba(109,59,245,.2);color:var(--c-primary-2)}
.card-wide .tag{margin-bottom:14px}

/* ============ FAQ ============ */
.faq{max-width:880px}
.faq-item{border-top:1px solid var(--c-line)}
.faq-item:last-child{border-bottom:1px solid var(--c-line)}
.faq-q{margin:0}
.faq-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:transparent;border:0;cursor:pointer;text-align:left;
  padding:22px 0;font-size:17px;font-weight:700;line-height:1.6;color:var(--c-text);
  transition:color var(--ease);
}
.faq-btn:hover{color:var(--c-accent)}
.faq-icon{position:relative;width:16px;height:16px;flex:none}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--c-accent);border-radius:2px;
  transition:transform var(--ease),opacity var(--ease);
}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{left:7px;top:0;width:2px;height:16px}
.faq-btn[aria-expanded="true"] .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{
  padding:0 0 24px;max-width:70ch;
  font-size:15.5px;line-height:1.85;color:var(--c-text-2);
}
.faq-a[hidden]{display:none}

/* ============ 底部 CTA ============ */
.cta-band{
  background:rgba(109,59,245,.12);
  border:1px solid rgba(109,59,245,.42);
  border-radius:20px;padding:48px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:32px;
}
.cta-band h2{font-size:clamp(24px,2.8vw,34px);max-width:640px}
.cta-band p{margin-top:12px;color:var(--c-text-2);font-size:16px;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--c-bg-2);border-top:1px solid var(--c-line);
  padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:32px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:#fff}
.footer-brand .brand{margin-bottom:6px}
.footer-brand p{color:var(--c-text-2);font-size:14px;line-height:1.8;margin-top:14px;max-width:360px}
.footer-links li{margin-bottom:10px}
.footer-links a{
  display:inline-block;font-size:15px;color:var(--c-text-2);
  transition:color var(--ease),transform var(--ease);
}
.footer-links a:hover{color:var(--c-accent);transform:translateX(2px)}
.footer-text{display:block;font-size:14px;color:var(--c-text-2);margin-bottom:10px;line-height:1.7}
.footer-form{display:flex;gap:10px;margin-top:14px}
.footer-form input{
  flex:1;min-width:0;height:44px;padding:0 14px;
  background:var(--c-panel);border:1px solid var(--c-line);
  border-radius:var(--radius-input);color:var(--c-text);font-size:14px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.footer-form input::placeholder{color:var(--c-text-3)}
.footer-form input:focus{
  outline:none;border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(47,227,192,.25);
}
.footer-form .btn{height:44px;padding:0 18px;border-radius:var(--radius-input);font-size:14px}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid var(--c-line);
  text-align:center;
}
.footer-bottom p{font-size:13px;color:var(--c-text-3);line-height:1.8}

/* 锚点滚动留白 */
#compare,#guide,#detail,#faq,#cta{scroll-margin-top:72px}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .section{padding:72px 0}
  .paper-wrap{padding:72px 0}
  .paper{padding:40px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
}
@media (max-width:991px){
  .topbar{display:flex}
  .main{margin-left:0;padding-top:56px}
  .sidebar{
    width:280px;transform:translateX(-100%);
    transition:transform .3s cubic-bezier(.2,.7,.3,1);
    box-shadow:var(--shadow-float);
  }
  .sidebar.is-open{transform:translateX(0)}
  .compare{grid-template-columns:1fr}
  .card-wide{grid-template-columns:1fr;gap:24px;padding:26px}
  .paper-wrap{padding:64px 0}
  .paper{padding:34px;border-radius:18px}
  .paper p{font-size:16.5px}
  .cta-band{padding:36px}
  #compare,#guide,#detail,#faq,#cta{scroll-margin-top:72px}
}
@media (max-width:767px){
  .container-wide{padding:0 20px}
  .section{padding:56px 0}
  .page-hero-inner{padding:48px 0 40px}
  .hero-actions .btn{flex:1 1 100%}
  .compare-card{padding:24px}
  .paper{padding:24px;border-radius:16px}
  .paper h2{margin:32px 0 14px}
  .card-duo{grid-template-columns:1fr}
  .card-wide{padding:22px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-form{flex-direction:column}
  .footer-form .btn{width:100%}
  .cta-band{padding:28px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
}
@media (max-width:520px){
  .page-hero h1{font-size:30px}
  .section-title{font-size:24px}
  .faq-btn{font-size:16px}
  .hero-badge{font-size:12px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .card:hover,.card-wide:hover,.compare-card:hover,.tip-card:hover,.btn:hover{transform:none}
}