/* roulang page: index */
:root{
  --ink-900:#05080F;
  --ink-800:#0A1122;
  --ink-700:#101A31;
  --glass:rgba(17,28,52,.55);
  --line:rgba(140,180,255,.14);
  --brand:#2EE6C5;
  --brand-2:#4B63F0;
  --warn:#FF7A59;
  --t-hi:#E9F0FF;
  --t:#B7C6E0;
  --t-dim:#7E8FB0;
  --sh-1:0 8px 24px rgba(3,8,20,.45);
  --sh-glow:0 0 0 1px rgba(46,230,197,.25),0 8px 28px rgba(46,230,197,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --r:18px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--ink-900);color:var(--t);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;line-height:1.8;letter-spacing:.01em;overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;transition:color .24s var(--ease);}
a:hover{color:#7FF3DD;}
p{margin:0 0 1em;}
h1,h2,h3,h4,h5{color:var(--t-hi);margin:0 0 14px;font-weight:700;line-height:1.3;letter-spacing:0;}
h1{font-size:clamp(28px,4vw,52px);line-height:1.18;font-weight:800;letter-spacing:-.5px;}
h2{font-size:clamp(22px,2.4vw,34px);line-height:1.3;}
h3{font-size:19px;font-weight:600;line-height:1.4;}
h4{font-size:16px;font-weight:600;}
ul,ol{margin:0 0 1em;padding-left:20px;}
li{margin-bottom:.4em;}
button{font:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px;width:100%;}
.sec{padding:88px 0;position:relative;}
.sec-alt{background:var(--ink-800);}
.bg-grid{
  background-image:linear-gradient(rgba(140,180,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(140,180,255,.04) 1px,transparent 1px);
  background-size:24px 24px;
}
.sec-head{max-width:780px;margin-bottom:44px;}
.eyebrow{display:inline-flex;align-items:center;font-size:12px;letter-spacing:.16em;color:var(--brand);margin-bottom:14px;font-weight:700;text-transform:uppercase;}
.sec-lead{font-size:16px;line-height:1.78;color:var(--t);margin:0;}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;text-decoration:none;
  transition:all .24s var(--ease);line-height:1;white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,#2EE6C5,#4B63F0);color:#04121A;box-shadow:var(--sh-glow);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(46,230,197,.3),0 12px 36px rgba(46,230,197,.28);color:#04121A;}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--t-hi);text-decoration:none;}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.btn-warn{background:transparent;border-color:rgba(255,122,89,.5);color:#FF9C82;text-decoration:none;}
.btn-warn:hover{border-color:var(--warn);color:#fff;background:rgba(255,122,89,.1);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;border-radius:999px;}

/* ============ 通用组件 ============ */
.card{
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--sh-1);transition:all .24s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(46,230,197,.35);box-shadow:0 14px 34px rgba(3,8,20,.55);}
.card-glass{
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh-1);
}
.tag{
  display:inline-flex;align-items:center;font-size:12px;line-height:1;padding:5px 10px;
  border-radius:8px;border:1px solid var(--line);color:var(--t-dim);white-space:nowrap;
}
.tag-brand{border-color:rgba(75,99,240,.5);color:#9EAEFF;}
.tag-warn{border-color:rgba(255,122,89,.45);color:#FF9C82;}
.icon-box{
  width:44px;height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:rgba(46,230,197,.07);color:var(--brand);flex:0 0 auto;
}
.icon-box svg{width:22px;height:22px;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(5,8,15,.72);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease);
}
.site-header.scrolled{box-shadow:var(--sh-1);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px;}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--t-hi);}
.brand:hover{color:var(--t-hi);}
.brand-mark{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;color:var(--brand);}
.brand-mark svg{width:30px;height:30px;}
.brand-text{font-size:18px;font-weight:800;letter-spacing:.02em;line-height:1.2;}
.brand-text em{font-style:normal;color:var(--brand);}
.nav-menu{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0;}
.nav-menu li{margin:0;}
.nav-menu a{
  display:inline-flex;align-items:center;height:40px;padding:0 14px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--t);text-decoration:none;position:relative;
  transition:all .24s var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:50%;bottom:4px;transform:translateX(-50%) scaleX(0);
  width:16px;height:2px;border-radius:2px;background:var(--brand);transition:transform .24s var(--ease);
}
.nav-menu a:hover,.nav-menu a.active{color:var(--brand);}
.nav-menu a:hover::after,.nav-menu a.active::after{transform:translateX(-50%) scaleX(1);}
.nav-menu .nav-cta a{color:#04121A;background:linear-gradient(135deg,#2EE6C5,#4B63F0);height:42px;padding:0 20px;border-radius:999px;font-weight:700;box-shadow:var(--sh-glow);margin-left:10px;}
.nav-menu .nav-cta a::after{display:none;}
.nav-menu .nav-cta a:hover{transform:translateY(-2px);color:#04121A;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:transparent;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;
  transition:border-color .24s var(--ease);padding:0;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--t-hi);border-radius:2px;transition:all .24s var(--ease);}
.nav-toggle:hover{border-color:var(--brand);}
.nav-toggle.open span:first-child{transform:translateY(3.5px) rotate(45deg);}
.nav-toggle.open span:last-child{transform:translateY(-3.5px) rotate(-45deg);}

/* ============ Hero ============ */
.hero{position:relative;padding:76px 0 92px;overflow:hidden;isolation:isolate;background:var(--ink-900);}
.hero-bg{
  position:absolute;inset:0;z-index:-2;
  background-image:url('/assets/images/84177f913f15546b.jpg');
  background-size:cover;background-position:center;opacity:.16;
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(600px 400px at 82% 8%,rgba(46,230,197,.10),transparent 70%),
    linear-gradient(180deg,rgba(5,8,15,.45),rgba(5,8,15,.95));
}
.hero-band{position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(46,230,197,.85),transparent);z-index:1;}
.hero h1{max-width:15em;}
.hero-sub{font-size:17px;color:var(--t-hi);font-weight:600;margin-bottom:14px;line-height:1.6;}
.hero-text{font-size:16px;line-height:1.85;color:var(--t);max-width:34em;}
.hero-hint{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--t-dim);margin-top:16px;}
.hero-hint svg{width:16px;height:16px;color:var(--brand);flex:0 0 auto;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 22px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:6px;}
.hero-card{padding:18px;overflow:hidden;}
.hero-card-figure{border-radius:14px;overflow:hidden;border:1px solid var(--line);margin-bottom:14px;position:relative;}
.hero-card-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-card-title{font-size:14px;font-weight:700;color:var(--t-hi);margin:0 0 10px;}
.dl-row{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;}
.dl-row .btn{height:44px;padding:0 10px;font-size:13px;}

/* ============ 下载区 ============ */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.dl-card{padding:26px 22px;display:flex;flex-direction:column;gap:12px;}
.dl-card h3{margin:0;font-size:18px;}
.dl-card p{margin:0;font-size:14px;line-height:1.7;color:var(--t);}
.dl-card .btn{align-self:flex-start;margin-top:4px;}
.dl-note{font-size:13px;color:var(--t-dim);margin-top:22px;display:flex;align-items:flex-start;gap:8px;}
.dl-note svg{width:15px;height:15px;flex:0 0 auto;margin-top:4px;color:var(--brand-2);}

/* ============ Bento 功能矩阵 ============ */
.bento{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.bento-item{padding:24px;display:flex;flex-direction:column;gap:12px;}
.bento-item.feature{grid-column:span 2;grid-row:span 2;justify-content:flex-start;background:linear-gradient(160deg,rgba(46,230,197,.08),rgba(16,26,49,.9) 55%);}
.bento-item.feature .feature-figure{border-radius:14px;overflow:hidden;border:1px solid var(--line);margin-top:auto;}
.bento-item.feature .feature-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.bento-item h3{margin:0;font-size:17px;}
.bento-item p{margin:0;font-size:14px;line-height:1.7;color:var(--t);}
.bento-wide{grid-column:span 4;}

/* ============ 指南入口 ============ */
.guide-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.guide-card{padding:24px 22px;display:flex;flex-direction:column;gap:10px;text-decoration:none;color:inherit;}
.guide-card:hover{color:inherit;}
.guide-num{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;color:var(--brand);letter-spacing:.12em;}
.guide-card h3{margin:0;font-size:17px;}
.guide-card p{margin:0;font-size:14px;line-height:1.7;color:var(--t-dim);}
.guide-card .go{margin-top:auto;font-size:13px;font-weight:700;color:var(--brand);}

/* ============ 隐私能力清单 ============ */
.check-list{list-style:none;margin:0;padding:0;}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;padding:14px 0;
  border-bottom:1px dashed var(--line);font-size:15px;line-height:1.7;color:var(--t);
}
.check-list li:last-child{border-bottom:0;}
.check-list svg{width:18px;height:18px;flex:0 0 auto;margin-top:5px;color:var(--brand);}
.figure-panel{border-radius:var(--r);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);}
.figure-panel img{width:100%;aspect-ratio:3/4;object-fit:cover;}
.figure-cap{font-size:13px;color:var(--t-dim);margin-top:12px;}

/* ============ 步骤时间轴 ============ */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative;margin-top:12px;}
.step{padding:0 14px;position:relative;}
.step::before{content:"";position:absolute;top:18px;left:0;right:0;height:1px;background:var(--line);}
.step:first-child::before{left:50%;}
.step:last-child::before{right:50%;}
.step-node{
  position:relative;z-index:1;width:36px;height:36px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;margin:0 auto 16px;
  background:var(--ink-700);border:1px solid var(--line);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;color:var(--t-hi);
}
.step.active .step-node{border-color:var(--brand);color:var(--brand);box-shadow:0 0 0 1px rgba(46,230,197,.25),0 0 22px rgba(46,230,197,.28);}
.step h3{font-size:15px;text-align:center;margin:0 0 8px;}
.step p{font-size:13px;line-height:1.7;color:var(--t-dim);text-align:center;margin:0;}

/* ============ 场景卡 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:start;}
.scene-card{overflow:hidden;padding:0;display:flex;flex-direction:column;}
.scene-card:nth-child(2){margin-top:24px;}
.scene-card figure{margin:0;overflow:hidden;}
.scene-card figure img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s var(--ease);}
.scene-card:hover figure img{transform:scale(1.04);}
.scene-body{padding:20px 20px 24px;}
.scene-body h3{margin:10px 0 8px;font-size:17px;}
.scene-body p{margin:0;font-size:14px;line-height:1.75;color:var(--t);}

/* ============ 风险专题 ============ */
.risk-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.risk-card{
  padding:24px 22px;border-radius:var(--r);background:rgba(255,122,89,.05);
  border:1px solid rgba(255,122,89,.35);transition:all .24s var(--ease);
}
.risk-card:hover{border-color:rgba(255,122,89,.6);transform:translateY(-3px);box-shadow:0 14px 34px rgba(3,8,20,.5);}
.risk-card h3{margin:12px 0 14px;font-size:17px;color:#FFB6A3;}
.risk-line{display:flex;gap:8px;font-size:14px;line-height:1.7;margin-bottom:10px;color:var(--t);}
.risk-line span.k{flex:0 0 62px;color:#FF9C82;font-weight:700;}
.risk-line:last-child{margin-bottom:0;}

/* ============ 对照卡 ============ */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--ink-700);}
.compare-col{padding:26px 24px;}
.compare-col:first-child{border-right:1px solid var(--line);}
.compare-col h3{font-size:17px;display:flex;align-items:center;gap:8px;margin-bottom:16px;}
.compare-col h3 svg{width:18px;height:18px;}
.compare-col.on h3{color:var(--brand);}
.compare-col.off h3{color:#FF9C82;}
.compare-list{list-style:none;margin:0;padding:0;}
.compare-list li{font-size:14px;line-height:1.7;color:var(--t);padding:10px 0;border-bottom:1px dashed var(--line);}
.compare-list li:last-child{border-bottom:0;}

/* ============ 资讯列表 ============ */
.list-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:36px;}
.list-head .sec-head{margin-bottom:0;}
.news-card{
  display:flex;flex-direction:column;gap:10px;padding:22px;height:100%;
  text-decoration:none;color:inherit;
}
.news-card:hover{color:inherit;}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;}
.news-date{font-size:12px;color:var(--t-dim);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;}
.news-title{font-size:17px;margin:0;line-height:1.5;color:var(--t-hi);}
.news-excerpt{font-size:14px;line-height:1.7;color:var(--t-dim);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-more{margin-top:auto;font-size:13px;font-weight:700;color:var(--brand);}
.empty-box{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:64px 20px;border:1px dashed var(--line);border-radius:var(--r);color:var(--t-dim);
  text-align:center;
}
.empty-box svg{width:64px;height:64px;color:var(--line);}
.empty-box p{margin:0;font-size:14px;}

/* ============ FAQ ============ */
.faq-wrap{max-width:920px;margin:0 auto;}
.faq-item{
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden;
  transition:border-color .24s var(--ease);
}
.faq-item:hover{border-color:rgba(46,230,197,.3);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:transparent;border:0;color:var(--t-hi);
  font-size:16px;font-weight:600;text-align:left;cursor:pointer;line-height:1.6;
  transition:color .24s var(--ease);
}
.faq-q:hover{color:var(--brand);}
.faq-sign{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;position:relative;transition:all .24s var(--ease);
}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform .24s var(--ease);
}
.faq-sign::before{width:11px;height:2px;}
.faq-sign::after{width:2px;height:11px;}
.faq-item.open .faq-sign{border-color:var(--brand);background:rgba(46,230,197,.1);}
.faq-item.open .faq-sign::after{transform:scaleY(0);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease);}
.faq-item.open .faq-a{max-height:420px;}
.faq-a-inner{
  padding:0 22px 20px 22px;font-size:15px;line-height:1.8;color:var(--t);
  border-left:3px solid var(--brand);margin-left:22px;padding-left:18px;
}
.faq-a-inner p{margin:0;}

/* ============ 终端适配宽卡 ============ */
.term-card{padding:36px;display:grid;grid-template-columns:1.35fr 1fr;gap:36px;align-items:center;}
.term-card h2{font-size:clamp(20px,2.2vw,28px);margin-bottom:14px;}
.term-card p{font-size:15px;line-height:1.8;color:var(--t);margin-bottom:0;}
.term-list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;}
.term-item{
  border:1px solid var(--line);border-radius:14px;padding:16px 12px;text-align:center;
  background:rgba(16,26,49,.7);transition:all .24s var(--ease);
}
.term-item:hover{border-color:rgba(46,230,197,.4);transform:translateY(-2px);}
.term-item svg{width:22px;height:22px;color:var(--brand);margin:0 auto 8px;}
.term-item span{display:block;font-size:12px;color:var(--t-dim);margin-bottom:8px;}
.term-item a{font-size:13px;font-weight:700;color:var(--t-hi);text-decoration:none;}
.term-item a:hover{color:var(--brand);}

/* ============ 保障条 ============ */
.assure{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:34px 0;}
.assure-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;}
.assure-item{
  text-align:center;font-size:14px;color:var(--t);font-weight:600;
  padding:6px 10px;border-right:1px solid var(--line);
}
.assure-item:last-child{border-right:0;}

/* ============ 反馈表单 ============ */
.feedback-card{padding:40px;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start;}
.feedback-card h2{font-size:clamp(22px,2.4vw,30px);}
.feedback-card p{font-size:15px;line-height:1.8;color:var(--t);}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;color:var(--t-dim);margin-bottom:8px;font-weight:600;}
.field input,.field select,.field textarea{
  width:100%;background:var(--ink-700);border:1px solid var(--line);border-radius:12px;
  color:var(--t-hi);font-size:15px;padding:0 14px;height:48px;
  transition:all .24s var(--ease);font-family:inherit;
}
.field textarea{height:118px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:var(--t-dim);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(46,230,197,.14);
}
.field select{
  appearance:none;-webkit-appearance:none;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%237E8FB0' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:38px;
}
.form-note{font-size:12px;color:var(--t-dim);line-height:1.7;margin:12px 0 0;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--t-dim);margin:0;max-width:22em;}
.footer-col h4{font-size:13px;letter-spacing:.1em;color:var(--t-dim);font-weight:700;margin-bottom:16px;}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--t-dim);text-decoration:none;transition:color .24s var(--ease);}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--t-dim);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .bento{grid-template-columns:repeat(2,1fr);}
  .bento-item.feature{grid-column:span 2;grid-row:auto;}
  .bento-wide{grid-column:span 2;}
}
@media (max-width:991px){
  .sec{padding:64px 0;}
  .hero{padding:56px 0 68px;}
  .nav-toggle{display:flex;}
  .nav-menu{
    position:absolute;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(5,8,15,.98);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);padding:14px 20px 22px;display:none;
    box-shadow:0 24px 48px rgba(3,8,20,.6);
  }
  .nav-menu.open{display:flex;}
  .nav-menu a{height:48px;padding:0 12px;width:100%;}
  .nav-menu a::after{display:none;}
  .nav-menu .nav-cta a{margin:8px 0 0;width:100%;height:48px;}
  .dl-grid{grid-template-columns:repeat(2,1fr);}
  .guide-grid{grid-template-columns:repeat(2,1fr);}
  .risk-grid{grid-template-columns:1fr;}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .scene-card:nth-child(2){margin-top:0;}
  .steps{grid-template-columns:1fr;gap:0;}
  .step{display:grid;grid-template-columns:36px 1fr;gap:14px;padding:0 0 22px;text-align:left;}
  .step::before{top:0;bottom:0;left:17px;right:auto;width:1px;height:auto;}
  .step:first-child::before{left:17px;top:18px;}
  .step:last-child::before{right:auto;bottom:auto;height:18px;}
  .step-node{margin:0;}
  .step h3,.step p{text-align:left;}
  .step h3{margin-bottom:4px;}
  .term-card{grid-template-columns:1fr;gap:24px;padding:28px;}
  .feedback-card{grid-template-columns:1fr;gap:28px;padding:28px;}
  .assure-grid{grid-template-columns:repeat(2,1fr);row-gap:16px;}
  .assure-item:nth-child(2){border-right:0;}
  .assure-item:nth-child(1),.assure-item:nth-child(2){padding-bottom:14px;border-bottom:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .compare-col{padding:22px 18px;}
}
@media (max-width:575px){
  .sec{padding:48px 0;}
  .hero{padding:40px 0 56px;}
  h1{font-size:clamp(26px,7vw,34px);}
  .hero-actions .btn{width:100%;}
  .dl-grid{grid-template-columns:1fr;}
  .guide-grid{grid-template-columns:1fr;}
  .bento{grid-template-columns:1fr;}
  .bento-item.feature{grid-column:span 1;}
  .bento-wide{grid-column:span 1;}
  .scene-grid{grid-template-columns:1fr;}
  .compare{grid-template-columns:1fr;}
  .compare-col:first-child{border-right:0;border-bottom:1px solid var(--line);}
  .assure-grid{grid-template-columns:1fr;row-gap:12px;}
  .assure-item{border-right:0;border-bottom:1px solid var(--line);padding-bottom:12px;}
  .assure-item:last-child{border-bottom:0;}
  .term-list{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .dl-row{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .faq-q{font-size:15px;padding:16px 16px;}
  .faq-a-inner{margin-left:16px;padding-left:14px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --ink-900:#05080F;
  --ink-800:#0A1122;
  --ink-700:#101A31;
  --glass:rgba(17,28,52,.55);
  --line:rgba(140,180,255,.14);
  --brand:#2EE6C5;
  --brand-2:#4B63F0;
  --warn:#FF7A59;
  --t-hi:#E9F0FF;
  --t:#B7C6E0;
  --t-dim:#7E8FB0;
  --sh-1:0 8px 24px rgba(3,8,20,.45);
  --sh-glow:0 0 0 1px rgba(46,230,197,.25),0 8px 28px rgba(46,230,197,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --r:18px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--ink-900);color:var(--t);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;line-height:1.8;letter-spacing:.01em;overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;transition:color .24s var(--ease);}
a:hover{color:#7FF3DD;}
button{font:inherit;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
h1,h2,h3,h4{margin:0;color:var(--t-hi);}
h2{font-size:clamp(22px,2.4vw,34px);line-height:1.3;font-weight:700;letter-spacing:-.2px;}
h3{font-size:18px;line-height:1.45;font-weight:600;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px;width:100%;}
.bg-grid{
  background-image:linear-gradient(rgba(140,180,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(140,180,255,.04) 1px,transparent 1px);
  background-size:24px 24px;
}
.eyebrow{display:inline-flex;align-items:center;font-size:12px;letter-spacing:.16em;color:var(--brand);margin-bottom:14px;font-weight:700;text-transform:uppercase;}
.sec{padding:88px 0;position:relative;}
.sec-alt{background:var(--ink-800);}
.sec-head{max-width:780px;margin-bottom:44px;}
.sec-head h2{margin-bottom:14px;}
.sec-lead{font-size:16px;line-height:1.8;color:var(--t);margin:0;}
/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;text-decoration:none;
  transition:all .24s var(--ease);line-height:1;white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,#2EE6C5,#4B63F0);color:#04121A;box-shadow:var(--sh-glow);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(46,230,197,.3),0 12px 36px rgba(46,230,197,.28);color:#04121A;}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--t-hi);text-decoration:none;}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}
/* ============ 卡片 / 标签 ============ */
.card{
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--sh-1);transition:all .24s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(46,230,197,.35);box-shadow:0 14px 34px rgba(3,8,20,.55);}
.card-glass{
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh-1);
}
.tag{
  display:inline-flex;align-items:center;font-size:12px;line-height:1;padding:5px 10px;
  border-radius:8px;border:1px solid var(--line);color:var(--t-dim);white-space:nowrap;
}
.tag-brand{border-color:rgba(75,99,240,.5);color:#9EAEFF;}
.tag-warn{border-color:rgba(255,122,89,.45);color:#FF9C82;}
/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(5,8,15,.72);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease);
}
.site-header.scrolled{box-shadow:var(--sh-1);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px;}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--t-hi);}
.brand:hover{color:var(--t-hi);}
.brand-mark{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;color:var(--brand);}
.brand-mark svg{width:30px;height:30px;}
.brand-text{font-size:18px;font-weight:800;letter-spacing:.02em;line-height:1.2;}
.brand-text em{font-style:normal;color:var(--brand);}
.nav-menu{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0;}
.nav-menu li{margin:0;}
.nav-menu a{
  display:inline-flex;align-items:center;height:40px;padding:0 14px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--t);text-decoration:none;position:relative;
  transition:all .24s var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:50%;bottom:4px;transform:translateX(-50%) scaleX(0);
  width:16px;height:2px;border-radius:2px;background:var(--brand);transition:transform .24s var(--ease);
}
.nav-menu a:hover,.nav-menu a.active{color:var(--brand);}
.nav-menu a:hover::after,.nav-menu a.active::after{transform:translateX(-50%) scaleX(1);}
.nav-menu .nav-cta a{color:#04121A;background:linear-gradient(135deg,#2EE6C5,#4B63F0);height:42px;padding:0 20px;border-radius:999px;font-weight:700;box-shadow:var(--sh-glow);margin-left:10px;}
.nav-menu .nav-cta a::after{display:none;}
.nav-menu .nav-cta a:hover{transform:translateY(-2px);color:#04121A;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:transparent;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;
  transition:border-color .24s var(--ease);padding:0;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--t-hi);border-radius:2px;transition:all .24s var(--ease);}
.nav-toggle:hover{border-color:var(--brand);}
.nav-toggle.open span:first-child{transform:translateY(3.5px) rotate(45deg);}
.nav-toggle.open span:last-child{transform:translateY(-3.5px) rotate(-45deg);}
/* ============ 分类标题条 ============ */
.cat-hero{
  position:relative;padding:52px 0 64px;overflow:hidden;isolation:isolate;
  background:var(--ink-900);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background-image:url('/assets/images/2d6bb9bfdf8a694e.webp');
  background-size:cover;background-position:center;opacity:.14;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(520px 340px at 88% 0%,rgba(46,230,197,.10),transparent 70%),
    linear-gradient(180deg,rgba(5,8,15,.55),rgba(5,8,15,.96));
}
.cat-hero .hero-band{position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(46,230,197,.85),transparent);}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t-dim);margin-bottom:22px;flex-wrap:wrap;}
.crumbs a{color:var(--t-dim);text-decoration:none;}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{opacity:.5;}
.crumbs .current{color:var(--t);}
.cat-hero-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:44px;align-items:center;}
.cat-hero h1{
  font-size:clamp(28px,3.4vw,44px);line-height:1.22;font-weight:800;letter-spacing:-.5px;
  margin-bottom:18px;max-width:16em;
}
.cat-lead{font-size:16px;line-height:1.85;color:var(--t);max-width:44em;margin-bottom:22px;}
.cat-tags{display:flex;flex-wrap:wrap;gap:10px;}
.cat-figure{
  margin:0;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--sh-1);background:var(--ink-700);aspect-ratio:16/9;
}
.cat-figure img{width:100%;height:100%;object-fit:cover;}
/* ============ 覆盖内容卡 ============ */
.cover-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.cover-card{padding:24px 22px;display:flex;flex-direction:column;gap:10px;}
.cover-num{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;letter-spacing:.12em;
  color:var(--brand);font-weight:700;
}
.cover-card h3{font-size:17px;}
.cover-card p{font-size:14px;line-height:1.7;color:var(--t-dim);margin:0;}
/* ============ 指南条目列表 ============ */
.guide-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.guide-card{
  display:flex;gap:16px;padding:16px;background:var(--ink-700);border:1px solid var(--line);
  border-radius:var(--r);box-shadow:var(--sh-1);transition:all .24s var(--ease);
}
.guide-card:hover{transform:translateY(-3px);border-color:rgba(46,230,197,.35);box-shadow:0 14px 34px rgba(3,8,20,.55);}
.guide-thumb{
  flex:0 0 172px;aspect-ratio:16/10;border-radius:12px;overflow:hidden;background:var(--ink-800);border:1px solid var(--line);
}
.guide-thumb img{width:100%;height:100%;object-fit:cover;}
.guide-body{min-width:0;display:flex;flex-direction:column;}
.guide-body h3{font-size:17px;margin-bottom:8px;line-height:1.45;}
.guide-body p{font-size:14px;line-height:1.72;color:var(--t-dim);margin:0 0 12px;}
.guide-meta{margin-top:auto;display:flex;flex-wrap:wrap;gap:8px;}
/* ============ 知识点 ============ */
.know-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:32px;align-items:start;}
.know-list{list-style:none;margin:0;padding:0;border-top:1px dashed var(--line);}
.know-list li{
  display:flex;gap:16px;padding:18px 0;border-bottom:1px dashed var(--line);
}
.know-list .k-num{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;font-weight:700;
  color:var(--brand);flex:0 0 34px;line-height:1.7;
}
.know-list .k-text{font-size:15px;line-height:1.75;color:var(--t);}
.know-list .k-text strong{color:var(--t-hi);font-weight:600;}
.know-side{padding:28px 26px;}
.know-side h3{font-size:18px;margin-bottom:18px;}
.know-side ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:16px;}
.know-side li{display:flex;gap:12px;font-size:14px;line-height:1.72;color:var(--t);}
.know-side li .dot{
  flex:0 0 8px;width:8px;height:8px;border-radius:50%;background:var(--brand);
  margin-top:9px;box-shadow:0 0 0 4px rgba(46,230,197,.12);
}
/* ============ 步骤流程 ============ */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;position:relative;}
.step{position:relative;padding:0 18px 0 0;}
.step::before{
  content:"";position:absolute;top:18px;left:36px;right:0;height:1px;background:var(--line);
}
.step:last-child::before{display:none;}
.step-node{
  width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;font-weight:700;
  background:var(--ink-700);border:1px solid var(--line);color:var(--t-hi);position:relative;z-index:1;
  margin-bottom:18px;transition:all .24s var(--ease);
}
.step:hover .step-node{border-color:var(--brand);color:var(--brand);box-shadow:var(--sh-glow);}
.step h3{font-size:16px;margin-bottom:8px;}
.step p{font-size:14px;line-height:1.7;color:var(--t-dim);margin:0;}
/* ============ 误解澄清 ============ */
.myth-list{display:flex;flex-direction:column;gap:18px;}
.myth-card{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.12fr);gap:0;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  box-shadow:var(--sh-1);
}
.myth-wrong{padding:22px 24px;border-right:1px solid var(--line);}
.myth-right{padding:22px 24px;border-left:3px solid var(--brand);}
.myth-label{
  display:inline-block;font-size:12px;letter-spacing:.08em;margin-bottom:10px;font-weight:700;
}
.myth-wrong .myth-label{color:var(--t-dim);}
.myth-right .myth-label{color:var(--brand);}
.myth-wrong p{font-size:15px;line-height:1.75;color:var(--t-dim);margin:0;}
.myth-right p{font-size:15px;line-height:1.75;color:var(--t);margin:0;}
/* ============ FAQ ============ */
.faq-wrap{max-width:900px;}
.faq-wrap .accordion-item{
  background:var(--ink-700);border:1px solid var(--line);border-radius:14px;
  overflow:hidden;margin-bottom:12px;
}
.faq-wrap .accordion-button{
  background:transparent;color:var(--t-hi);font-size:16px;font-weight:600;
  padding:18px 22px;box-shadow:none;line-height:1.55;
}
.faq-wrap .accordion-button:not(.collapsed){
  color:var(--brand);background:rgba(46,230,197,.05);box-shadow:inset 3px 0 0 var(--brand);
}
.faq-wrap .accordion-button:focus{box-shadow:inset 0 0 0 1px var(--brand);}
.faq-wrap .accordion-button::after{
  content:"+";background-image:none;width:24px;height:24px;font-size:22px;line-height:1;
  color:var(--brand);display:flex;align-items:center;justify-content:center;transform:none;
  transition:transform .24s var(--ease);flex:0 0 24px;
}
.faq-wrap .accordion-button:not(.collapsed)::after{content:"−";transform:none;}
.faq-wrap .accordion-body{color:var(--t);font-size:15px;line-height:1.85;padding:2px 22px 20px;}
/* ============ 下载 CTA ============ */
.dl-band{
  padding:36px;border-radius:var(--r);border:1px solid var(--line);
  background:var(--ink-700);box-shadow:var(--sh-1);
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:28px;align-items:center;
}
.dl-band h2{font-size:clamp(20px,2.2vw,28px);margin-bottom:8px;}
.dl-band p{font-size:14px;color:var(--t-dim);margin:0;}
.dl-btns{display:flex;flex-wrap:wrap;gap:12px;}
.dl-return{display:flex;flex-wrap:wrap;gap:18px;align-items:center;margin-top:26px;font-size:14px;color:var(--t-dim);}
.dl-return a{color:var(--t-dim);text-decoration:none;border-bottom:1px dashed var(--line);padding-bottom:2px;}
.dl-return a:hover{color:var(--brand);border-color:var(--brand);}
/* ============ 页脚 ============ */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--t-dim);margin:16px 0 0;max-width:34em;}
.footer-brand .brand{margin-bottom:0;}
.footer-col h4{font-size:13px;letter-spacing:.12em;color:var(--t-hi);font-weight:700;margin-bottom:16px;text-transform:none;}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--t-dim);text-decoration:none;}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0 26px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--t-dim);
}
/* ============ 响应式 ============ */
@media (max-width:991px){
  .sec{padding:64px 0;}
  .nav-toggle{display:flex;}
  .nav-menu{
    position:absolute;top:72px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(5,8,15,.97);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    padding:12px 20px 20px;display:none;
  }
  .nav-menu.open{display:flex;}
  .nav-menu a{height:48px;width:100%;padding:0 12px;}
  .nav-menu a::after{display:none;}
  .nav-menu .nav-cta a{margin:10px 0 0;justify-content:center;width:100%;}
  .cat-hero{padding:36px 0 52px;}
  .cat-hero-grid{grid-template-columns:1fr;gap:28px;}
  .cat-figure{aspect-ratio:16/9;max-width:520px;}
  .cover-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .guide-list{grid-template-columns:1fr;}
  .know-grid{grid-template-columns:1fr;gap:24px;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:28px;}
  .step::before{display:none;}
  .myth-card{grid-template-columns:1fr;}
  .myth-wrong{border-right:none;border-bottom:1px solid var(--line);}
  .myth-right{border-left:3px solid var(--brand);}
  .dl-band{grid-template-columns:1fr;padding:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:575px){
  .sec{padding:48px 0;}
  .cat-hero h1{font-size:clamp(24px,6.4vw,30px);}
  .cover-grid{grid-template-columns:1fr;}
  .guide-card{flex-direction:column;gap:14px;}
  .guide-thumb{flex:none;width:100%;aspect-ratio:16/9;}
  .steps{grid-template-columns:1fr;}
  .dl-btns .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .know-side{padding:22px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --ink-900:#05080F;
  --ink-800:#0A1122;
  --ink-700:#101A31;
  --glass:rgba(17,28,52,.55);
  --line:rgba(140,180,255,.14);
  --brand:#2EE6C5;
  --brand-2:#4B63F0;
  --warn:#FF7A59;
  --t-hi:#E9F0FF;
  --t:#B7C6E0;
  --t-dim:#7E8FB0;
  --sh-1:0 8px 24px rgba(3,8,20,.45);
  --sh-glow:0 0 0 1px rgba(46,230,197,.25),0 8px 28px rgba(46,230,197,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --r:18px;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--ink-900);color:var(--t);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;line-height:1.8;letter-spacing:.01em;overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
h1,h2,h3,h4{color:var(--t-hi);margin:0 0 14px;font-weight:700;line-height:1.32;word-break:break-word;}
h1{font-size:clamp(24px,3vw,38px);line-height:1.26;font-weight:800;letter-spacing:-.4px;}
h2{font-size:clamp(21px,2.2vw,30px);}
h3{font-size:19px;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
a{color:var(--brand);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;transition:color .24s var(--ease);}
a:hover{color:#7FF3DD;}
button{font:inherit;}
a:focus-visible,button:focus-visible,.btn:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px;}
.eyebrow{display:inline-flex;align-items:center;font-size:12px;letter-spacing:.16em;color:var(--brand);margin-bottom:12px;font-weight:700;text-transform:uppercase;}
.sec-head{margin-bottom:30px;max-width:820px;}
.sec-lead{font-size:15.5px;line-height:1.78;color:var(--t);margin:0;}
/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;text-decoration:none;line-height:1;white-space:nowrap;
  transition:all .24s var(--ease);color:var(--t-hi);background:transparent;
}
.btn-primary{background:linear-gradient(135deg,#2EE6C5,#4B63F0);color:#04121A;box-shadow:var(--sh-glow);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(46,230,197,.3),0 12px 36px rgba(46,230,197,.28);color:#04121A;}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--t-hi);text-decoration:none;}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}
/* ============ 标签 ============ */
.tag{
  display:inline-flex;align-items:center;font-size:12px;line-height:1;padding:5px 10px;
  border-radius:8px;border:1px solid var(--line);color:var(--t-dim);white-space:nowrap;
}
.tag-brand{border-color:rgba(75,99,240,.5);color:#9EAEFF;}
/* ============ 卡片 ============ */
.card{
  display:block;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--sh-1);transition:all .24s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(46,230,197,.35);box-shadow:0 14px 34px rgba(3,8,20,.55);}
.card-glass{
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh-1);
}
/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(5,8,15,.72);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease);
}
.site-header.scrolled{box-shadow:var(--sh-1);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px;}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--t-hi);}
.brand:hover{color:var(--t-hi);}
.brand-mark{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;color:var(--brand);}
.brand-mark svg{width:30px;height:30px;}
.brand-text{font-size:18px;font-weight:800;letter-spacing:.02em;line-height:1.2;}
.brand-text em{font-style:normal;color:var(--brand);}
.nav-menu{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0;}
.nav-menu li{margin:0;}
.nav-menu a{
  display:inline-flex;align-items:center;height:40px;padding:0 14px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--t);text-decoration:none;position:relative;
  transition:all .24s var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:50%;bottom:4px;transform:translateX(-50%) scaleX(0);
  width:16px;height:2px;border-radius:2px;background:var(--brand);transition:transform .24s var(--ease);
}
.nav-menu a:hover,.nav-menu a.active{color:var(--brand);}
.nav-menu a:hover::after,.nav-menu a.active::after{transform:translateX(-50%) scaleX(1);}
.nav-menu .nav-cta a{color:#04121A;background:linear-gradient(135deg,#2EE6C5,#4B63F0);height:42px;padding:0 20px;border-radius:999px;font-weight:700;box-shadow:var(--sh-glow);margin-left:10px;}
.nav-menu .nav-cta a::after{display:none;}
.nav-menu .nav-cta a:hover{transform:translateY(-2px);color:#04121A;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:transparent;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;
  transition:border-color .24s var(--ease);padding:0;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--t-hi);border-radius:2px;transition:all .24s var(--ease);}
.nav-toggle:hover{border-color:var(--brand);}
.nav-toggle.open span:first-child{transform:translateY(3.5px) rotate(45deg);}
.nav-toggle.open span:last-child{transform:translateY(-3.5px) rotate(-45deg);}
/* ============ 文章页板块 ============ */
.article-hero{position:relative;padding:52px 0 30px;overflow:hidden;isolation:isolate;}
.article-hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:radial-gradient(600px 320px at 88% -10%,rgba(46,230,197,.10),transparent 70%);
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t-dim);margin-bottom:22px;}
.crumb a{color:var(--t-dim);text-decoration:none;}
.crumb a:hover{color:var(--brand);}
.crumb-sep{color:rgba(126,143,176,.55);}
.crumb-cur{color:var(--t);}
.article-hero .tag-brand{margin-bottom:16px;}
.article-lead{font-size:16px;line-height:1.8;color:var(--t);max-width:820px;margin:14px 0 0;}
/* 信息条 */
.meta-sec{padding:0 0 34px;}
.meta-strip{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding:16px 22px;border:1px solid var(--line);border-radius:14px;
  background:var(--ink-800);font-size:13px;color:var(--t-dim);
}
.meta-left,.meta-right{display:inline-flex;flex-wrap:wrap;align-items:center;gap:14px;}
.meta-item{display:inline-flex;align-items:center;gap:6px;}
.meta-item time,.meta-num{font-family:var(--mono);color:var(--t);}
.meta-dot{width:3px;height:3px;border-radius:50%;background:rgba(126,143,176,.7);}
/* 要点速览 */
.key-sec{padding:0 0 52px;}
.key-card{padding:26px 28px;}
.key-card h2{font-size:18px;margin-bottom:16px;letter-spacing:.01em;}
.key-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:14px 26px;margin:0;padding:0;}
.key-list li{display:flex;gap:10px;font-size:14.5px;line-height:1.7;color:var(--t);}
.key-list li::before{
  content:"";flex:0 0 auto;width:7px;height:7px;margin-top:9px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 10px rgba(46,230,197,.6);
}
/* 正文布局 */
.content-sec{padding:0 0 68px;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start;}
.article-main{max-width:760px;width:100%;min-width:0;}
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px;}
.side-card{padding:20px 20px 22px;}
.side-title{font-size:14px;letter-spacing:.08em;color:var(--t-hi);margin:0 0 14px;font-weight:700;}
.side-desc{font-size:13.5px;line-height:1.7;color:var(--t-dim);margin:0 0 14px;}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:340px;overflow:auto;}
.toc-link{
  font-size:13.5px;line-height:1.55;color:var(--t-dim);text-decoration:none;
  padding:7px 10px;border-left:2px solid transparent;border-radius:0 8px 8px 0;
  transition:all .2s var(--ease);
}
.toc-link:hover{color:var(--t-hi);background:rgba(140,180,255,.06);}
.toc-link.active{color:var(--brand);border-left-color:var(--brand);background:rgba(46,230,197,.07);}
.toc-toggle{display:none;width:100%;height:42px;margin-bottom:10px;border-radius:10px;border:1px solid var(--line);background:transparent;color:var(--t);font-size:14px;cursor:pointer;transition:all .24s var(--ease);}
.toc-toggle:hover{border-color:var(--brand);color:var(--brand);}
.side-dl .dl-mini{
  display:flex;align-items:center;justify-content:space-between;
  height:44px;padding:0 14px;margin-bottom:10px;border-radius:12px;
  border:1px solid var(--line);background:rgba(140,180,255,.04);
  color:var(--t);font-size:14px;text-decoration:none;transition:all .24s var(--ease);
}
.side-dl .dl-mini:last-child{margin-bottom:0;}
.side-dl .dl-mini:hover{border-color:var(--brand);color:var(--brand);}
.side-dl .dl-mini::after{content:"↓";font-family:var(--mono);color:var(--brand);}
.side-list{list-style:none;margin:0;padding:0;}
.side-list li{padding:10px 0;border-bottom:1px dashed var(--line);}
.side-list li:last-child{border-bottom:0;padding-bottom:0;}
.side-list li:first-child{padding-top:0;}
.side-list a{font-size:14px;line-height:1.6;color:var(--t);text-decoration:none;}
.side-list a:hover{color:var(--brand);}
/* 正文排版 */
.article-body{font-size:16px;line-height:1.9;color:var(--t);letter-spacing:.01em;}
.article-body h2{
  font-size:clamp(20px,2vw,26px);margin:40px 0 16px;padding-left:14px;position:relative;
  color:var(--t-hi);scroll-margin-top:96px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;
  border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:19px;margin:28px 0 12px;color:var(--t-hi);scroll-margin-top:96px;}
.article-body p{margin:0 0 1em;}
.article-body ul,.article-body ol{padding-left:22px;margin:0 0 1em;line-height:1.8;}
.article-body li{margin-bottom:.45em;}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;border-left:3px solid var(--brand-2);
  background:rgba(75,99,240,.09);border-radius:0 12px 12px 0;color:var(--t-hi);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:14px;margin:24px 0;width:100%;}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:13px;color:var(--t-dim);text-align:center;margin-top:8px;}
.article-body a{color:var(--brand);}
.article-body code{font-family:var(--mono);font-size:.92em;background:var(--ink-700);padding:2px 6px;border-radius:6px;color:#9EAEFF;}
.article-body strong{color:var(--t-hi);}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0;}
.article-body iframe{max-width:100%;border-radius:14px;}
/* 空态 */
.empty-state{
  padding:56px 24px;text-align:center;border:1px dashed var(--line);
  border-radius:var(--r);background:rgba(16,26,49,.45);
}
.empty-state svg{width:72px;height:72px;color:var(--line);margin:0 auto 18px;display:block;}
.empty-title{font-size:17px;font-weight:700;color:var(--t-hi);margin:0 0 8px;}
.empty-desc{font-size:14px;color:var(--t-dim);margin:0 0 20px;}
/* 自检清单 */
.check-sec{padding:72px 0;background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.check-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.check-card{padding:24px 22px;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r);transition:all .24s var(--ease);}
.check-card:hover{transform:translateY(-3px);border-color:rgba(46,230,197,.35);box-shadow:0 14px 34px rgba(3,8,20,.55);}
.check-num{display:inline-block;font-family:var(--mono);font-size:12px;color:var(--brand);letter-spacing:.1em;margin-bottom:10px;}
.check-card h3{font-size:16.5px;margin-bottom:8px;}
.check-card p{font-size:14px;line-height:1.75;color:var(--t-dim);margin:0;}
/* 相关推荐 */
.rec-sec{padding:72px 0;}
.rec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.rec-card{padding:22px;display:flex;flex-direction:column;gap:10px;text-decoration:none;color:inherit;}
.rec-card:hover{color:inherit;}
.rec-card h3{font-size:16.5px;line-height:1.5;margin:0;color:var(--t-hi);transition:color .24s var(--ease);}
.rec-card:hover h3{color:var(--brand);}
.rec-desc{font-size:13.5px;line-height:1.7;color:var(--t-dim);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rec-date{font-size:12.5px;color:var(--t-dim);font-family:var(--mono);margin-top:auto;}
.rec-empty{padding:44px 24px;text-align:center;border:1px dashed var(--line);border-radius:var(--r);background:rgba(16,26,49,.45);}
.rec-empty p{font-size:14px;color:var(--t-dim);margin:0 0 16px;}
/* 下载条 */
.download-sec{padding:0 0 72px;}
.dl-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
  padding:34px 36px;border-radius:var(--r);
  background:var(--glass);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(16px) saturate(140%);backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--sh-1);position:relative;overflow:hidden;
}
.dl-bar::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(46,230,197,.8),transparent);}
.dl-copy{max-width:520px;}
.dl-copy h2{font-size:clamp(20px,2.2vw,26px);margin-bottom:10px;}
.dl-copy p{font-size:14.5px;line-height:1.75;color:var(--t-dim);margin:0;}
.dl-actions{display:flex;flex-wrap:wrap;gap:12px;}
.dl-btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:132px;height:48px;padding:0 22px;border-radius:999px;
  font-size:14.5px;font-weight:700;text-decoration:none;line-height:1;
  border:1px solid var(--line);color:var(--t-hi);background:transparent;
  transition:all .24s var(--ease);
}
.dl-btn:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.dl-btn.primary{background:linear-gradient(135deg,#2EE6C5,#4B63F0);color:#04121A;border-color:transparent;box-shadow:var(--sh-glow);}
.dl-btn.primary:hover{color:#04121A;box-shadow:0 0 0 1px rgba(46,230,197,.3),0 12px 36px rgba(46,230,197,.28);}
/* 返回条 */
.foot-sec{padding:0 0 76px;}
.article-foot{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:16px;padding-top:26px;border-top:1px solid var(--line);
}
.foot-note{font-size:13px;line-height:1.7;color:var(--t-dim);max-width:620px;}
/* ============ 页脚 ============ */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);padding-top:56px;}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:36px;padding-bottom:42px;}
.footer-brand p{font-size:14px;line-height:1.75;color:var(--t-dim);margin:16px 0 0;max-width:34em;}
.footer-col h4{font-size:13px;letter-spacing:.12em;color:var(--t-hi);margin:0 0 16px;font-weight:700;text-transform:uppercase;}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--t-dim);text-decoration:none;transition:color .24s var(--ease);}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  padding:20px 0;border-top:1px solid var(--line);font-size:13px;color:var(--t-dim);
}
/* ============ 响应式 ============ */
@media (max-width:1199px){
  .article-layout{gap:36px;}
}
@media (max-width:991px){
  .nav-toggle{display:flex;}
  .nav-menu{
    position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;
    background:rgba(5,8,15,.97);border-bottom:1px solid var(--line);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    padding:12px 20px 20px;display:none;
  }
  .nav-menu.open{display:flex;}
  .nav-menu a{height:48px;padding:0 12px;font-size:16px;}
  .nav-menu a::after{display:none;}
  .nav-menu .nav-cta a{margin:8px 0 0;justify-content:center;width:100%;height:48px;}
  .article-hero{padding:38px 0 26px;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:32px;}
  .article-side{position:static;}
  .article-main{max-width:none;}
  .toc-toggle{display:block;}
  .toc-list{display:none;}
  .toc-list.open{display:flex;max-height:none;}
  .check-sec,.rec-sec{padding:56px 0;}
  .check-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .rec-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .dl-bar{padding:28px 24px;}
}
@media (max-width:767px){
  .key-list{grid-template-columns:1fr;}
  .meta-strip{flex-direction:column;align-items:flex-start;gap:10px;}
}
@media (max-width:575px){
  .content-sec{padding-bottom:52px;}
  .check-grid,.rec-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .dl-actions{width:100%;}
  .dl-btn{flex:1 1 100%;}
  .article-foot{flex-direction:column;align-items:flex-start;}
  .key-card{padding:22px 20px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
  .card:hover,.check-card:hover,.btn:hover,.dl-btn:hover{transform:none;}
}