/* roulang page: index */
:root{
  --brand:#1D5FA8;
  --brand-deep:#164A85;
  --brand-light:#E8F1FB;
  --warn:#C97A18;
  --warn-bg:#FDF3E4;
  --danger:#C0392B;
  --safe:#17756A;
  --nav-bg:#0C1626;
  --neon:#37D6F5;
  --neon2:#7C9BFF;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --line:#E4EAF2;
  --text:#1E2A38;
  --muted:#5B6B7C;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 8px 24px rgba(20,45,80,.07);
  --shadow-hover:0 14px 32px rgba(20,45,80,.12);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.block{padding:72px 0}
.block--white{background:var(--card)}
.block--grey{background:var(--bg)}
.block--soft{background:linear-gradient(180deg,#EEF5FD 0%,#F6F9FE 100%)}
.block--warn{background:var(--warn-bg)}
.sec-head{max-width:760px;margin-bottom:36px}
.sec-head--center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.5px;
  color:var(--brand);background:var(--brand-light);
  padding:5px 12px;border-radius:999px;margin-bottom:14px;
}
.sec-title{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.2px}
.sec-sub{margin-top:12px;color:var(--muted);font-size:15.5px;line-height:1.85;max-width:760px}
.sec-head--center .sec-sub{margin-left:auto;margin-right:auto}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:200;background:var(--nav-bg)}
.site-header.is-scrolled{box-shadow:0 10px 30px rgba(4,12,24,.45)}
.nav-topline{height:2px;background:linear-gradient(90deg,var(--neon),var(--neon2));opacity:.7}
.nav-wrap{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  min-height:68px;display:flex;align-items:center;gap:20px;
  border-bottom:1px solid rgba(55,214,245,.22);
}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;color:#fff}
.logo-mark{width:34px;height:34px;flex-shrink:0}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text strong{font-size:17px;letter-spacing:.6px;font-weight:700}
.logo-text em{font-style:normal;font-size:11px;letter-spacing:3px;color:var(--neon);margin-top:2px}
.nav-panel{display:flex;align-items:center;gap:14px;margin-left:auto;min-width:0}
.site-nav{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;border-radius:8px;
  font-size:14.5px;color:#C7D5E5;transition:color .22s ease,background .22s ease;white-space:nowrap;
}
.nav-link:hover{color:#fff;background:rgba(55,214,245,.09)}
.nav-link.active{color:var(--neon)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--neon);border-radius:2px;
}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:10px;
  border:1px solid rgba(55,214,245,.35);align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--neon);position:relative;border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--neon);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;text-align:center;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);box-shadow:0 10px 24px rgba(29,95,168,.28);transform:translateY(-1px)}
.btn-outline{background:#fff;color:var(--brand);border-color:rgba(29,95,168,.35)}
.btn-outline:hover{background:var(--brand-light);border-color:var(--brand)}
.btn-warn{background:var(--warn);color:#fff}
.btn-warn:hover{background:#A96112;box-shadow:0 10px 24px rgba(201,122,24,.28)}
.btn-neon{background:var(--neon);color:#08131F;font-weight:700}
.btn-neon:hover{background:#5AE3FA;box-shadow:0 10px 24px rgba(55,214,245,.35)}
.btn-ghost-neon{background:transparent;color:#fff;border-color:rgba(55,214,245,.65)}
.btn-ghost-neon:hover{background:rgba(55,214,245,.13);border-color:var(--neon)}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}
.text-link{color:var(--brand);font-weight:600;border-bottom:1px solid rgba(29,95,168,.35);transition:border-color .22s ease,color .22s ease}
.text-link:hover{color:var(--brand-deep);border-color:var(--brand-deep)}

/* ===== Hero ===== */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(125deg,#0F2E52 0%,#164A85 42%,#1D5FA8 78%,#12518F 100%);
  padding:66px 0 0;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(115deg,rgba(55,214,245,.10) 0 1px,transparent 1px 74px);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;padding-bottom:84px;display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:start}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  padding:6px 14px;border-radius:999px;color:#BEE9FA;
  border:1px solid rgba(55,214,245,.45);background:rgba(55,214,245,.10);margin-bottom:20px;
}
.hero h1{font-size:40px;line-height:1.25;font-weight:800;letter-spacing:-.5px;margin-bottom:20px;max-width:14em}
.hero-lead{font-size:16px;line-height:1.9;color:#CFE0F0;max-width:640px}
.hero-cta{margin-top:30px;display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.hero-capsule{
  margin-top:26px;display:inline-flex;align-items:center;gap:10px;
  font-size:13px;color:#FFE0B2;border:1px solid rgba(201,122,24,.75);
  background:rgba(201,122,24,.14);padding:8px 16px;border-radius:999px;
}
.hero-capsule i{width:8px;height:8px;border-radius:50%;background:var(--warn);display:inline-block;flex-shrink:0}
.hero-panel{
  border:1px solid rgba(55,214,245,.30);border-radius:16px;
  background:rgba(8,22,40,.52);padding:26px 24px;
}
.hero-panel h2{font-size:16px;font-weight:700;color:#fff;margin-bottom:4px}
.hero-panel .panel-note{font-size:13px;color:#9FB8CE;margin-bottom:18px}
.check-list{display:grid;gap:14px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:14px;line-height:1.7;color:#D8E6F3}
.check-dot{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;
  border:1px solid var(--neon);color:var(--neon);font-size:12px;
  display:flex;align-items:center;justify-content:center;margin-top:2px;
}
.hero-slant{position:relative;z-index:2;height:70px;background:var(--bg);clip-path:polygon(0 100%,100% 0,100% 100%);margin-top:-70px}

/* ===== Metrics ===== */
.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.metric-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;min-width:0;
}
.metric-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(29,95,168,.3)}
.metric-num{
  font-family:"DIN Alternate","Roboto Mono",monospace;font-size:36px;line-height:1.1;
  font-weight:700;color:var(--brand);letter-spacing:-1px;
}
.metric-num small{font-size:15px;font-weight:600;margin-left:4px;letter-spacing:0}
.metric-label{font-size:15px;font-weight:700;margin-top:8px}
.metric-note{font-size:13px;color:var(--muted);line-height:1.7;margin-top:6px}
.metric-disclaimer{
  margin-top:26px;font-size:13px;color:var(--muted);line-height:1.8;
  border-left:3px solid var(--line);padding-left:14px;
}

/* ===== Entry guide ===== */
.entry-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:28px;align-items:start}
.step-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.step-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:var(--shadow);min-width:0;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.step-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(29,95,168,.3)}
.step-dot{
  width:30px;height:30px;border-radius:50%;border:1px solid var(--neon);
  color:#0E5E7A;background:rgba(55,214,245,.16);font-size:14px;font-weight:700;
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.step-card h3{font-size:16.5px;font-weight:700;margin-bottom:8px}
.step-card p{font-size:14px;color:var(--muted);line-height:1.78}
.wrong-box{background:#EDF1F6;border:1px solid #DCE3EC;border-radius:var(--radius);padding:24px 22px}
.wrong-box h3{font-size:16px;font-weight:700;margin-bottom:6px}
.wrong-box .wrong-sub{font-size:13px;color:var(--muted);margin-bottom:16px}
.wrong-list{display:grid;gap:12px}
.wrong-list li{
  display:flex;gap:10px;font-size:13.5px;line-height:1.7;color:#42566B;
  background:#fff;border-radius:10px;padding:12px 14px;border:1px solid #E1E8F0;
}
.wrong-list li::before{content:"×";color:var(--danger);font-weight:700;flex-shrink:0}

/* ===== Flow timeline ===== */
.flow-list{display:grid;gap:0;max-width:900px;margin:0 auto}
.flow-item{position:relative;padding:0 0 28px 46px;border-left:2px solid var(--line)}
.flow-item:last-child{border-left-color:transparent;padding-bottom:0}
.flow-num{
  position:absolute;left:-19px;top:0;width:36px;height:36px;border-radius:50%;
  background:var(--brand);color:#fff;font-size:15px;font-weight:700;
  display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(29,95,168,.3);
}
.flow-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow)}
.flow-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.flow-card p{font-size:14px;color:var(--muted);line-height:1.78}
.tagline{display:inline-block;margin-top:12px;font-size:12.5px;font-weight:600;color:var(--brand);background:var(--brand-light);padding:4px 10px;border-radius:999px}
.flow-foot{margin-top:30px;text-align:center;font-size:14px;color:var(--muted)}

/* ===== Bento ===== */
.bento{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.bento-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:var(--shadow);min-width:0;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.bento-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(29,95,168,.3)}
.bento-main{grid-column:span 2;grid-row:span 2;background:linear-gradient(160deg,#FFFFFF 0%,#F2F8FF 100%)}
.bento-main h3{font-size:21px;font-weight:700;margin-bottom:10px}
.bento-main > p{font-size:14.5px;color:var(--muted);line-height:1.8;margin-bottom:16px}
.bento-main ul{display:grid;gap:10px}
.bento-main li{display:flex;gap:9px;font-size:14px;line-height:1.72;color:#33465A}
.bento-main li::before{content:"";flex-shrink:0;width:6px;height:6px;border-radius:50%;background:var(--brand);margin-top:9px}
.bento-card h4{font-size:15.5px;font-weight:700;margin-bottom:8px}
.bento-card p{font-size:13.5px;color:var(--muted);line-height:1.75}

/* ===== Risk reveal ===== */
.risk-bar{
  display:flex;align-items:center;gap:12px;background:var(--warn);color:#fff;
  border-radius:var(--radius);padding:14px 20px;font-size:14.5px;font-weight:600;margin-bottom:26px;
}
.risk-bar svg{flex-shrink:0}
.risk-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:28px;align-items:start}
.level-group{display:grid;gap:12px}
.level-item{
  display:flex;align-items:center;gap:14px;background:#fff;border:1px solid #F0DCC0;
  border-radius:var(--radius);padding:14px 18px;
}
.level-pill{
  flex-shrink:0;font-size:13px;font-weight:700;padding:5px 14px;border-radius:999px;color:#fff;
}
.level-low{background:var(--safe)}
.level-mid{background:var(--warn)}
.level-high{background:var(--danger)}
.level-item p{font-size:13.5px;color:#5A4A32;line-height:1.7}
.risk-items{display:grid;gap:14px}
.risk-item{background:#fff;border:1px solid #F0DCC0;border-radius:var(--radius);padding:18px 20px}
.risk-item h4{font-size:15.5px;font-weight:700;margin-bottom:6px;color:#4A3618}
.risk-item p{font-size:13.5px;color:#6A5638;line-height:1.78}

/* ===== Compare ===== */
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.compare-card{border-radius:var(--radius);padding:26px 24px;border:1px solid var(--line);min-width:0}
.compare-plain{background:#F3F5F8;border-color:#E2E7EE}
.compare-leverage{background:var(--brand-light);border-color:rgba(29,95,168,.25)}
.compare-card h3{font-size:18px;font-weight:700;margin-bottom:18px}
.compare-row{margin-bottom:18px}
.compare-row:last-child{margin-bottom:0}
.compare-row .row-head{display:flex;justify-content:space-between;font-size:13.5px;color:#43566B;margin-bottom:8px;gap:12px}
.bar{height:9px;border-radius:999px;background:#DDE4EC;overflow:hidden}
.bar i{display:block;height:100%;border-radius:999px;background:#8FA3B8}
.compare-leverage .bar{background:#CFDFF1}
.compare-leverage .bar i{background:var(--brand)}
.compare-note{margin-top:26px;font-size:13px;color:var(--muted);text-align:center}

/* ===== Milestone ===== */
.milestone{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.milestone-item{position:relative;padding-top:26px;border-top:2px solid var(--line);min-width:0}
.milestone-item::before{
  content:"";position:absolute;top:-7px;left:0;width:12px;height:12px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 4px rgba(29,95,168,.14);
}
.milestone-item h3{font-size:16px;font-weight:700;margin-bottom:8px}
.milestone-item p{font-size:13.5px;color:var(--muted);line-height:1.78}

/* ===== Scenes ===== */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.scene-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);min-width:0;display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(29,95,168,.3)}
.scene-visual{
  aspect-ratio:16/9;position:relative;display:flex;align-items:flex-end;padding:16px;
  background:linear-gradient(140deg,#164A85 0%,#1D5FA8 55%,#2E7BC8 100%);
}
.scene-visual::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(90deg,rgba(255,255,255,.12) 0 1px,transparent 1px 32px);
}
.scene-visual span{
  position:relative;z-index:2;font-size:12.5px;font-weight:600;color:#EAF4FF;
  background:rgba(12,22,38,.42);border:1px solid rgba(255,255,255,.24);
  padding:4px 12px;border-radius:999px;
}
.scene-body{padding:20px 20px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.scene-body h3{font-size:16.5px;font-weight:700;line-height:1.5}
.scene-body p{font-size:14px;color:var(--muted);line-height:1.78;flex:1}

/* ===== News ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.news-card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);min-width:0;overflow:hidden;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(29,95,168,.3)}
.news-cover{
  aspect-ratio:16/10;background:linear-gradient(135deg,#1B4F86,#2E7BC8 70%,#3E93D8);
  position:relative;display:flex;align-items:center;justify-content:center;
}
.news-cover::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(60deg,rgba(255,255,255,.10) 0 1px,transparent 1px 26px);
}
.news-cover b{position:relative;z-index:2;font-size:13px;color:#DCEBFA;letter-spacing:2px;font-weight:600}
.news-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:9px;flex:1}
.news-tag{align-self:flex-start;font-size:12.5px;font-weight:600;color:var(--brand);background:var(--brand-light);padding:3px 10px;border-radius:999px}
.news-title{
  font-size:16px;font-weight:700;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-excerpt{
  font-size:13.5px;color:var(--muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;flex:1;
}
.news-date{font-size:12.5px;color:#8896A6}
.news-empty{
  text-align:center;padding:52px 24px;background:var(--card);border:1px dashed #CFDBE8;
  border-radius:var(--radius);
}
.news-empty .empty-icon{
  width:52px;height:52px;border-radius:50%;background:var(--brand-light);color:var(--brand);
  display:flex;align-items:center;justify-content:center;margin:0 auto 14px;
}
.news-empty p{font-size:14.5px;color:var(--muted);margin-bottom:18px}

/* ===== Guard ===== */
.guard-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.guard-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;min-width:0}
.guard-icon{
  width:42px;height:42px;border-radius:12px;background:var(--brand-light);color:var(--brand);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.guard-item h3{font-size:15.5px;font-weight:700;margin-bottom:8px}
.guard-item p{font-size:13.5px;color:var(--muted);line-height:1.78}

/* ===== Quick answer ===== */
.quick-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.quick-card{
  position:relative;display:block;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px 46px 22px 22px;min-width:0;box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.quick-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(29,95,168,.3)}
.quick-card h3{font-size:15px;font-weight:700;margin-bottom:8px;line-height:1.6}
.quick-card p{font-size:13.5px;color:var(--muted);line-height:1.75}
.quick-card .plus{
  position:absolute;top:20px;right:20px;color:var(--brand);font-size:18px;font-weight:700;
  width:22px;height:22px;line-height:20px;text-align:center;
}

/* ===== FAQ ===== */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:flex-start;gap:14px;text-align:left;
  padding:20px 0;font-size:16px;font-weight:600;line-height:1.65;transition:color .22s ease;
}
.faq-q:hover{color:var(--brand)}
.faq-q .qmark{
  flex-shrink:0;width:24px;height:24px;border-radius:50%;background:var(--brand-light);
  color:var(--brand);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:2px;
}
.faq-q .arrow{margin-left:auto;flex-shrink:0;color:var(--muted);transition:transform .28s ease;margin-top:2px}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-item.open .faq-a{max-height:420px}
.faq-a-inner{
  font-size:14.5px;color:var(--muted);line-height:1.85;background:#F8FAFD;
  border-radius:10px;padding:16px 18px;margin:0 0 20px 38px;
}

/* ===== Download ===== */
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.download-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow);min-width:0;display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.download-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(29,95,168,.3)}
.dl-icon{
  width:48px;height:48px;border-radius:14px;background:var(--brand-light);color:var(--brand);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.download-card h3{font-size:17px;font-weight:700;margin-bottom:6px}
.download-card .dl-file{font-size:13px;color:#8A98A8;margin-bottom:10px;word-break:break-word}
.download-card p{font-size:13.5px;color:var(--muted);line-height:1.75;margin-bottom:20px;flex:1}
.download-card .btn{width:100%}
.dl-note{margin-top:24px;text-align:center;font-size:13px;color:var(--muted)}

/* ===== Tags ===== */
.tag-wall{display:flex;flex-wrap:wrap;gap:12px}
.tag-pill{
  display:inline-flex;align-items:center;font-size:14px;color:#42566B;
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 18px;
  transition:border-color .22s ease,color .22s ease,box-shadow .22s ease,transform .22s ease;
}
.tag-pill:hover{color:var(--brand);border-color:var(--brand);box-shadow:0 8px 18px rgba(29,95,168,.14);transform:translateY(-2px)}

/* ===== Contact form ===== */
.lead-grid{display:grid;grid-template-columns:5fr 7fr;gap:36px;align-items:start}
.lead-info h2{font-size:28px;line-height:1.35;font-weight:700;margin-bottom:16px}
.lead-info p{font-size:15px;color:var(--muted);line-height:1.85;margin-bottom:20px}
.lead-points{display:grid;gap:12px}
.lead-points li{display:flex;gap:10px;font-size:14px;line-height:1.7;color:#33465A}
.lead-points li::before{
  content:"";flex-shrink:0;width:18px;height:18px;border-radius:50%;
  border:1px solid var(--brand);margin-top:4px;
  background:radial-gradient(circle,var(--brand) 0 3px,transparent 3px);
}
.form-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;box-shadow:var(--shadow)}
.form-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.field{margin-bottom:16px;min-width:0}
.field label{display:block;font-size:13px;font-weight:600;color:#42566B;margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;min-height:44px;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:11px 14px;font-size:14.5px;background:#FBFCFE;
  transition:border-color .22s ease,box-shadow .22s ease,background .22s ease;
}
.field textarea{resize:vertical;min-height:96px;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:#fff;
  box-shadow:0 0 0 3px rgba(29,95,168,.14);
}
.field.invalid input,.field.invalid select{border-color:var(--danger);box-shadow:0 0 0 3px rgba(192,57,43,.12)}
.err-msg{display:none;font-size:12px;color:var(--danger);margin-top:6px}
.field.invalid .err-msg{display:block}
.agree-row{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--muted);line-height:1.7;margin:6px 0 18px}
.agree-row input{width:16px;height:16px;margin-top:3px;flex-shrink:0;min-height:auto}
.form-card .btn{width:100%}
.form-note{font-size:12px;color:#8A98A8;line-height:1.7;margin-top:14px}
.form-tip{display:none;margin-top:14px;font-size:13.5px;color:var(--safe);background:#EAF6F3;border-radius:10px;padding:12px 14px}
.form-tip.show{display:block}

/* ===== Footer ===== */
.site-footer{background:var(--nav-bg);color:#9FB3C7;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.6fr 1.1fr;gap:32px;padding-bottom:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:14px}
.footer-brand .logo-mark{width:30px;height:30px}
.footer-brand strong{font-size:16px;letter-spacing:.5px}
.footer-brand em{font-style:normal;display:block;font-size:11px;letter-spacing:3px;color:var(--neon);margin-top:2px}
.footer-about p{font-size:13.5px;line-height:1.8;color:#8FA5BB}
.footer-col h3{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.5px}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:13.5px;color:#9FB3C7;transition:color .22s ease}
.footer-links a:hover{color:var(--neon)}
.footer-note{font-size:12.5px;line-height:1.8;color:#7E93A8}
.footer-note strong{display:block;color:#C7D5E5;margin-bottom:6px;font-weight:600}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0;font-size:12.5px;color:#6F849A;text-align:center}

/* ===== Responsive ===== */
@media (max-width:1100px){
  .hero h1{font-size:34px}
  .hero-inner{grid-template-columns:1fr;gap:34px}
  .hero-panel{max-width:560px}
}
@media (max-width:992px){
  .nav-panel{
    position:fixed;top:70px;left:0;right:0;bottom:0;background:var(--nav-bg);
    display:none;flex-direction:column;align-items:stretch;gap:8px;
    padding:22px 24px 40px;overflow-y:auto;margin-left:0;
  }
  .nav-panel.open{display:flex}
  .site-nav{flex-direction:column;align-items:stretch;gap:4px}
  .nav-link{padding:13px 14px;font-size:15px}
  .nav-link.active::after{left:14px;right:auto;width:26px;bottom:6px}
  .nav-actions{flex-direction:column;align-items:stretch;gap:12px;margin-top:16px}
  .nav-actions .btn{width:100%}
  .nav-toggle{display:flex}
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bento{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bento-main{grid-column:span 2;grid-row:auto}
  .entry-grid{grid-template-columns:1fr}
  .step-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .risk-grid{grid-template-columns:1fr}
  .milestone{grid-template-columns:repeat(2,minmax(0,1fr))}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .guard-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .quick-grid{grid-template-columns:1fr}
  .download-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .lead-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .nav-wrap{padding:0 16px}
  .block{padding:48px 0}
  .hero{padding-top:44px}
  .hero h1{font-size:28px}
  .hero-inner{padding-bottom:64px}
  .hero-slant{height:48px;margin-top:-48px}
  .sec-title{font-size:22px}
  .compare-grid{grid-template-columns:1fr}
  .step-list{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .download-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .lead-info h2{font-size:23px}
  .faq-a-inner{margin-left:0}
}
@media (max-width:520px){
  .metric-grid{grid-template-columns:1fr}
  .bento{grid-template-columns:1fr}
  .bento-main{grid-column:span 1}
  .guard-grid{grid-template-columns:1fr}
  .milestone{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .hero h1{font-size:25px}
  .hero-capsule{font-size:12px;line-height:1.6}
}

/* roulang page: article */
:root{
  --brand:#1D5FA8;
  --brand-deep:#164A85;
  --brand-light:#E8F1FB;
  --warn:#C97A18;
  --warn-bg:#FDF3E4;
  --danger:#C0392B;
  --safe:#17756A;
  --nav-bg:#0C1626;
  --neon:#37D6F5;
  --neon2:#7C9BFF;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --line:#E4EAF2;
  --text:#1E2A38;
  --muted:#5B6B7C;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 8px 24px rgba(20,45,80,.07);
  --shadow-hover:0 14px 32px rgba(20,45,80,.12);
  --container:1180px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.5px;
  color:var(--brand);background:var(--brand-light);
  padding:5px 12px;border-radius:999px;margin-bottom:14px;
}
.sec-title{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.2px;margin:0}
.sec-desc{font-size:15px;color:var(--muted);margin:12px 0 0;max-width:760px}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:200;background:var(--nav-bg)}
.site-header.is-scrolled{box-shadow:0 10px 30px rgba(4,12,24,.45)}
.nav-topline{height:2px;background:linear-gradient(90deg,var(--neon),var(--neon2));opacity:.7}
.nav-wrap{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  min-height:68px;display:flex;align-items:center;gap:20px;
  border-bottom:1px solid rgba(55,214,245,.22);
}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;color:#fff}
.logo-mark{width:34px;height:34px;flex-shrink:0}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text strong{font-size:17px;letter-spacing:.6px;font-weight:700}
.logo-text em{font-style:normal;font-size:11px;letter-spacing:3px;color:var(--neon);margin-top:2px}
.nav-panel{display:flex;align-items:center;gap:14px;margin-left:auto;min-width:0}
.site-nav{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;border-radius:8px;
  font-size:14.5px;color:#C7D5E5;transition:color .22s ease,background .22s ease;white-space:nowrap;
}
.nav-link:hover{color:#fff;background:rgba(55,214,245,.09)}
.nav-link.active{color:var(--neon)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--neon);border-radius:2px;
}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:10px;
  border:1px solid rgba(55,214,245,.35);align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--neon);position:relative;border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--neon);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;text-align:center;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);box-shadow:0 10px 24px rgba(29,95,168,.28);transform:translateY(-1px)}
.btn-outline{background:#fff;color:var(--brand);border-color:rgba(29,95,168,.35)}
.btn-outline:hover{background:var(--brand-light);border-color:var(--brand)}
.btn-warn{background:var(--warn);color:#fff}
.btn-warn:hover{background:#A96112;box-shadow:0 10px 24px rgba(201,122,24,.28)}
.btn-neon{background:var(--neon);color:#08131F;font-weight:700}
.btn-neon:hover{background:#5AE3FA;box-shadow:0 10px 24px rgba(55,214,245,.35)}
.btn-ghost-neon{background:transparent;color:#fff;border-color:rgba(55,214,245,.65)}
.btn-ghost-neon:hover{background:rgba(55,214,245,.13);border-color:var(--neon)}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}
.text-link{color:var(--brand);font-weight:600;border-bottom:1px solid rgba(29,95,168,.35);transition:border-color .22s ease,color .22s ease}
.text-link:hover{color:var(--brand-deep);border-color:var(--brand-deep)}

/* ===== Article head ===== */
.article-head{background:#FFFFFF;border-bottom:1px solid var(--line);padding:34px 0 42px}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:var(--muted);margin-bottom:22px;
}
.crumb a{color:var(--brand);transition:color .22s ease}
.crumb a:hover{color:var(--brand-deep)}
.crumb .sep{color:#B7C3D1}
.crumb .current{color:#405165;max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cat-chip{
  display:inline-flex;align-items:center;gap:7px;
  font-size:13px;font-weight:600;color:var(--brand);
  background:var(--brand-light);border:1px solid rgba(29,95,168,.18);
  padding:5px 13px;border-radius:999px;
}
.cat-chip i{width:6px;height:6px;border-radius:50%;background:var(--brand);display:inline-block}
.article-head h1{
  font-size:34px;line-height:1.4;font-weight:800;letter-spacing:-.3px;
  margin:16px 0 20px;max-width:900px;overflow-wrap:break-word;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  font-size:13.5px;color:var(--muted);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C6D2DF;display:inline-block}
.author-chip{display:inline-flex;align-items:center;gap:8px}
.author-chip .av{
  width:26px;height:26px;border-radius:50%;background:var(--brand-light);
  color:var(--brand);font-size:12px;font-weight:700;
  display:inline-flex;align-items:center;justify-content:center;
}

/* ===== Article body layout ===== */
.article-main{padding:52px 0 76px}
.article-shell{max-width:860px;margin:0 auto;min-width:0}
.key-points{
  background:var(--brand-light);border-left:3px solid var(--brand);
  border-radius:0 var(--radius) var(--radius) 0;
  padding:22px 26px;margin-bottom:30px;
}
.key-points h2{font-size:17px;font-weight:700;margin:0 0 12px;color:var(--brand-deep)}
.key-points ul{list-style:none;margin:0;padding:0}
.key-points li{
  position:relative;padding-left:20px;
  font-size:14.5px;line-height:1.85;color:#28415C;margin-bottom:8px;
}
.key-points li:last-child{margin-bottom:0}
.key-points li::before{
  content:"";position:absolute;left:2px;top:11px;
  width:7px;height:7px;border-radius:2px;background:var(--brand);
}
.article-card{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);
  padding:38px 40px;
}
.article-body{font-size:16px;line-height:1.95;color:var(--text);overflow-wrap:break-word}
.article-body h2{
  font-size:23px;line-height:1.4;font-weight:700;
  margin:40px 0 16px;padding-left:12px;border-left:3px solid var(--brand);
}
.article-body h3{font-size:18.5px;line-height:1.5;font-weight:700;margin:28px 0 12px}
.article-body h4{font-size:16.5px;font-weight:700;margin:22px 0 10px}
.article-body p{margin:0 0 1.2em}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(29,95,168,.35)}
.article-body a:hover{color:var(--brand-deep)}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:22px}
.article-body li{margin-bottom:.5em}
.article-body ul li::marker{color:var(--brand)}
.article-body ol li::marker{color:var(--brand);font-weight:700}
.article-body blockquote{
  margin:24px 0;padding:16px 22px;background:#F8FAFD;
  border-left:3px solid var(--brand);border-radius:0 10px 10px 0;color:#3B4A5A;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:22px auto}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14.5px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:#F2F6FB;font-weight:700}
.article-body pre{
  background:#0F2138;color:#DDE9F5;padding:16px 18px;border-radius:10px;
  overflow-x:auto;font-size:13.5px;line-height:1.7;
}
.article-body code{background:#EEF3F9;border-radius:4px;padding:1px 5px;font-size:14px}
.article-body hr{border:none;border-top:1px solid var(--line);margin:32px 0}

/* empty state */
.empty-state{text-align:center;padding:56px 26px}
.empty-state .empty-title{font-size:19px;font-weight:700;margin:0 0 18px;color:var(--text)}

/* ===== Risk box ===== */
.risk-box{
  margin-top:30px;background:var(--warn-bg);
  border:1px solid rgba(201,122,24,.42);border-radius:var(--radius);
  padding:24px 26px;display:grid;grid-template-columns:40px minmax(0,1fr);gap:16px;
}
.risk-icon{
  width:40px;height:40px;border-radius:10px;background:#FBE6C8;
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.risk-box h2{font-size:17px;font-weight:700;margin:0 0 10px;color:#8A5410}
.risk-box ul{margin:0;padding-left:18px}
.risk-box li{font-size:14.5px;line-height:1.85;color:#6B4B16;margin-bottom:6px}
.risk-box li:last-child{margin-bottom:0}
.risk-box .risk-foot{font-size:12.5px;color:#96703A;margin:12px 0 0}

/* ===== Glossary ===== */
.glossary{padding:64px 0;background:#FFFFFF;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.glossary-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;margin-top:28px;
}
.term-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;min-width:0;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.term-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(29,95,168,.3)}
.term-card dt{font-size:16px;font-weight:700;color:var(--brand-deep);margin-bottom:8px}
.term-card dd{margin:0;font-size:14px;line-height:1.85;color:var(--muted)}

/* ===== Tags ===== */
.tag-section{padding:34px 0 0}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.tag-pill{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13.5px;color:#31465C;background:#EEF3FA;
  border:1px solid var(--line);border-radius:999px;padding:6px 15px;
  transition:color .22s ease,border-color .22s ease,background .22s ease,transform .22s ease;
}
.tag-pill:hover{color:var(--brand);border-color:rgba(29,95,168,.45);background:#fff;transform:translateY(-1px)}

/* ===== Related ===== */
.related{padding:64px 0;background:var(--bg)}
.related-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;margin-top:28px;
}
.rel-card{
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;min-width:0;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(29,95,168,.3)}
.rel-thumb{
  height:104px;background:linear-gradient(125deg,#123863 0%,#1D5FA8 60%,#2A79BE 100%);
  display:flex;align-items:center;justify-content:center;
}
.rel-thumb svg{width:44px;height:44px;opacity:.92}
.rel-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.rel-body h3{font-size:15.5px;line-height:1.55;font-weight:700;margin:0;color:var(--text)}
.rel-body p{font-size:13.5px;line-height:1.75;color:var(--muted);margin:0}
.rel-more{margin-top:auto;font-size:13.5px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:5px}
.rel-card:hover .rel-more{color:var(--brand-deep)}

/* ===== Action bar ===== */
.article-actions{padding:0 0 76px;background:var(--bg)}
.action-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:26px 28px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
}
.action-card p{margin:0;font-size:14.5px;color:var(--muted);max-width:520px}
.action-btns{display:flex;flex-wrap:wrap;gap:12px}

/* ===== Footer ===== */
.site-footer{background:#0C1626;color:#A9BBD0;padding:56px 0 0;margin-top:0}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1.5fr 1fr;
  gap:34px;padding-bottom:38px;align-items:start;
}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:14px}
.footer-brand span{display:flex;flex-direction:column;line-height:1.2}
.footer-brand strong{font-size:16px;letter-spacing:.5px}
.footer-brand em{font-style:normal;font-size:11px;letter-spacing:3px;color:var(--neon);margin-top:2px}
.footer-about p{font-size:13.5px;line-height:1.9;color:#8FA3B8;margin:0}
.footer-col h3{font-size:14px;color:#fff;margin:0 0 14px;font-weight:700}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-links a{font-size:13.5px;color:#9FB3C8;transition:color .22s ease}
.footer-links a:hover{color:var(--neon)}
.footer-note{font-size:12.5px;line-height:1.85;color:#7E93A8;margin:0}
.footer-note strong{display:block;color:#D9C08A;margin-bottom:6px;font-size:12.5px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:18px 0;font-size:12.5px;color:#71869B;text-align:center;
}

/* ===== Responsive ===== */
@media (max-width:1199px){
  .article-head h1{font-size:31px}
}
@media (max-width:991px){
  .nav-toggle{display:flex}
  .nav-panel{
    position:fixed;left:0;right:0;top:70px;bottom:0;
    display:flex;flex-direction:column;align-items:stretch;gap:18px;
    background:#0C1626;padding:24px;margin-left:0;
    border-top:1px solid rgba(55,214,245,.22);
    overflow-y:auto;opacity:0;transform:translateY(-10px);
    pointer-events:none;transition:opacity .25s ease,transform .25s ease;
  }
  .nav-panel.is-open{opacity:1;transform:none;pointer-events:auto}
  .site-nav{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{padding:14px 10px;font-size:16px;border-bottom:1px solid rgba(255,255,255,.07);border-radius:0}
  .nav-link.active::after{display:none}
  .nav-actions{flex-direction:column;gap:10px}
  .nav-actions .btn{width:100%}
  .article-head h1{font-size:27px}
  .article-card{padding:28px 26px}
  .glossary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .nav-wrap{padding:0 16px}
  .article-head{padding:26px 0 32px}
  .article-head h1{font-size:23px;line-height:1.45}
  .article-main{padding:36px 0 56px}
  .article-card{padding:22px 18px}
  .article-body{font-size:15.5px}
  .article-body h2{font-size:20px;margin:32px 0 14px}
  .article-body h3{font-size:17.5px}
  .key-points{padding:18px 18px}
  .risk-box{grid-template-columns:1fr;padding:20px 18px}
  .glossary{padding:46px 0}
  .glossary-grid{grid-template-columns:minmax(0,1fr)}
  .related{padding:46px 0}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .action-card{padding:22px 18px;flex-direction:column;align-items:flex-start}
  .action-btns{width:100%}
  .action-btns .btn{flex:1 1 auto}
  .sec-title{font-size:22px}
  .article-actions{padding-bottom:52px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px}
  .crumb .current{max-width:100%}
}
@media (max-width:520px){
  .article-head h1{font-size:21px}
  .article-meta{gap:10px;font-size:12.5px}
  .article-meta .dot{display:none}
  .action-btns{flex-direction:column}
  .action-btns .btn{width:100%}
}

/* roulang page: category1 */
:root{
  --brand:#1D5FA8;
  --brand-deep:#164A85;
  --brand-light:#E8F1FB;
  --warn:#C97A18;
  --warn-bg:#FDF3E4;
  --danger:#C0392B;
  --safe:#17756A;
  --nav-bg:#0C1626;
  --neon:#37D6F5;
  --neon2:#7C9BFF;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --line:#E4EAF2;
  --text:#1E2A38;
  --muted:#5B6B7C;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 8px 24px rgba(20,45,80,.07);
  --shadow-hover:0 14px 32px rgba(20,45,80,.12);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.5px;
  color:var(--brand);background:var(--brand-light);
  padding:5px 12px;border-radius:999px;margin-bottom:14px;
}
.sec-title{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.2px}
.sec-sub{font-size:15px;color:var(--muted);margin-top:10px;max-width:760px}
.section{padding:72px 0}
.section--white{background:var(--card)}
.section--tint{background:var(--brand-light)}
/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:200;background:var(--nav-bg)}
.site-header.is-scrolled{box-shadow:0 10px 30px rgba(4,12,24,.45)}
.nav-topline{height:2px;background:linear-gradient(90deg,var(--neon),var(--neon2));opacity:.7}
.nav-wrap{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  min-height:68px;display:flex;align-items:center;gap:20px;
  border-bottom:1px solid rgba(55,214,245,.22);
}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;color:#fff}
.logo-mark{width:34px;height:34px;flex-shrink:0}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text strong{font-size:17px;letter-spacing:.6px;font-weight:700}
.logo-text em{font-style:normal;font-size:11px;letter-spacing:3px;color:var(--neon);margin-top:2px}
.nav-panel{display:flex;align-items:center;gap:14px;margin-left:auto;min-width:0}
.site-nav{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;border-radius:8px;
  font-size:14.5px;color:#C7D5E5;transition:color .22s ease,background .22s ease;white-space:nowrap;
}
.nav-link:hover{color:#fff;background:rgba(55,214,245,.09)}
.nav-link.active{color:var(--neon)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--neon);border-radius:2px;
}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:10px;
  border:1px solid rgba(55,214,245,.35);align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--neon);position:relative;border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--neon);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;text-align:center;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);box-shadow:0 10px 24px rgba(29,95,168,.28);transform:translateY(-1px)}
.btn-outline{background:#fff;color:var(--brand);border-color:rgba(29,95,168,.35)}
.btn-outline:hover{background:var(--brand-light);border-color:var(--brand)}
.btn-warn{background:var(--warn);color:#fff}
.btn-warn:hover{background:#A96112;box-shadow:0 10px 24px rgba(201,122,24,.28)}
.btn-neon{background:var(--neon);color:#08131F;font-weight:700}
.btn-neon:hover{background:#5AE3FA;box-shadow:0 10px 24px rgba(55,214,245,.35)}
.btn-ghost-neon{background:transparent;color:#fff;border-color:rgba(55,214,245,.65)}
.btn-ghost-neon:hover{background:rgba(55,214,245,.13);border-color:var(--neon)}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}
.text-link{color:var(--brand);font-weight:600;border-bottom:1px solid rgba(29,95,168,.35);transition:border-color .22s ease,color .22s ease}
.text-link:hover{color:var(--brand-deep);border-color:var(--brand-deep)}
/* ===== Page hero (category) ===== */
.page-hero{background:#EEF3F9;padding:44px 0 48px;border-bottom:1px solid var(--line)}
.page-hero-inner{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:36px;align-items:center}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:16px}
.breadcrumb a{color:var(--muted);transition:color .22s ease}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span.sep{color:#A9B8C8}
.breadcrumb strong{color:var(--text);font-weight:600}
.page-hero h1{font-size:34px;line-height:1.3;font-weight:800;letter-spacing:-.4px;margin-bottom:12px}
.page-hero .hero-lead-line{font-size:16px;color:var(--muted);max-width:660px}
.hero-badge{
  border:1px solid #C9DBEE;border-radius:14px;background:#fff;
  padding:22px 20px;text-align:center;
}
.hero-badge .badge-num{font-family:"DIN Alternate","Roboto Mono",monospace;font-size:30px;font-weight:700;color:var(--brand);line-height:1.2}
.hero-badge .badge-label{font-size:13px;color:var(--muted);margin-top:6px}
.hero-badge .badge-line{height:1px;background:var(--line);margin:16px 0}
.hero-badge .badge-tip{font-size:12.5px;color:var(--warn);line-height:1.7}
/* ===== Quick cards ===== */
.quick-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.quick-card{
  background:#fff;border:1px solid var(--line);border-left:3px solid var(--brand);
  border-radius:12px;padding:20px 20px 18px;min-width:0;
  transition:border-color .22s ease,background .22s ease;
}
.quick-card:hover{border-left-color:var(--warn);background:#FCFDFF}
.quick-card h3{font-size:16px;font-weight:700;margin-bottom:8px}
.quick-card p{font-size:14px;line-height:1.75;color:var(--muted)}
/* ===== Category layout ===== */
.cat-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:32px;align-items:start}
.post-card{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow);min-width:0;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(29,95,168,.3)}
.post-card + .post-card{margin-top:18px}
.post-meta-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:10px}
.post-tag{
  display:inline-block;font-size:12.5px;font-weight:600;color:var(--brand);
  background:var(--brand-light);border-radius:999px;padding:2px 12px;
}
.post-time{font-size:12.5px;color:var(--muted)}
.post-title{font-size:19px;line-height:1.5;font-weight:700;margin-bottom:8px}
.post-excerpt{
  font-size:14px;line-height:1.8;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.empty-state{
  background:#fff;border:1px dashed #C9D6E6;border-radius:var(--radius);
  padding:44px 24px;text-align:center;color:var(--muted);font-size:14.5px;
}
.aside-sticky{position:sticky;top:88px;display:grid;gap:20px}
.aside-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);min-width:0}
.aside-card h3{font-size:15px;font-weight:700;margin-bottom:12px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.aside-card p{font-size:13.5px;line-height:1.85;color:var(--muted)}
.term-list{display:grid;gap:12px}
.term-list li{font-size:13.5px;line-height:1.75;color:var(--muted);padding-left:14px;position:relative}
.term-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand)}
.term-list b{display:block;color:var(--text);font-size:14px;font-weight:700}
/* ===== Self assessment ===== */
.eval-list{max-width:860px;margin:0 auto}
.eval-step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow);
}
.eval-step + .eval-step{margin-top:16px}
.eval-step .eval-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;border-radius:50%;background:var(--brand-light);
  color:var(--brand);font-size:13px;font-weight:700;margin-bottom:10px;
}
.eval-step h3{font-size:17px;font-weight:700;line-height:1.5}
.eval-opts{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
.eval-opt{
  border:1px solid rgba(29,95,168,.35);background:#fff;color:var(--brand);
  border-radius:999px;padding:9px 20px;font-size:14px;font-weight:600;min-height:40px;
  transition:background .22s ease,border-color .22s ease,transform .22s ease;
}
.eval-opt:hover{background:var(--brand-light);border-color:var(--brand);transform:translateY(-1px)}
.eval-note{margin-top:18px;font-size:13px;color:var(--muted);text-align:center}
/* ===== Leverage & margin ===== */
.lever-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:40px;align-items:start}
.num-list{display:grid;gap:20px}
.num-item{display:grid;grid-template-columns:38px minmax(0,1fr);gap:14px;min-width:0}
.num-item .num{
  font-family:"DIN Alternate","Roboto Mono",monospace;font-size:15px;font-weight:700;
  color:var(--brand);background:var(--brand-light);border-radius:8px;
  width:38px;height:38px;display:flex;align-items:center;justify-content:center;
}
.num-item h3{font-size:16.5px;font-weight:700;margin-bottom:6px}
.num-item p{font-size:14.5px;line-height:1.85;color:var(--muted)}
.chart-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow)}
.ring{
  position:relative;width:180px;height:180px;border-radius:50%;margin:0 auto 22px;
  background:conic-gradient(var(--brand) 0 62%,#E7EEF7 62% 100%);
}
.ring-core{
  position:absolute;inset:26px;border-radius:50%;background:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
}
.ring-core strong{font-size:20px;color:var(--brand);font-family:"DIN Alternate","Roboto Mono",monospace}
.ring-core span{font-size:12px;color:var(--muted);margin-top:2px}
.bar-row{display:grid;grid-template-columns:66px minmax(0,1fr) 52px;align-items:center;gap:12px;margin-bottom:14px}
.bar-label{font-size:13.5px;color:var(--muted)}
.bar-track{height:12px;border-radius:999px;background:#EDF2F8;overflow:hidden}
.bar-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),#4E8CD0)}
.bar-fill.is-warn{background:linear-gradient(90deg,#B4741F,var(--warn))}
.bar-val{font-size:13px;color:var(--muted);text-align:right;font-family:"DIN Alternate","Roboto Mono",monospace}
.chart-caption{font-size:12.5px;color:var(--muted);line-height:1.7;margin-top:16px;padding-top:14px;border-top:1px solid var(--line)}
/* ===== Timeline ===== */
.tl{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:8px}
.tl-item{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:20px 18px 18px;min-width:0;box-shadow:var(--shadow);
}
.tl-item::after{content:"";position:absolute;top:28px;right:-19px;width:20px;border-top:2px dashed #C9D6E6}
.tl-item:last-child::after{display:none}
.tl-dot{width:12px;height:12px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(29,95,168,.14);margin-bottom:14px}
.tl-item h3{font-size:15.5px;font-weight:700;margin-bottom:8px}
.tl-item p{font-size:13.5px;line-height:1.8;color:var(--muted)}
.tl-note{margin-top:22px;font-size:12.5px;color:var(--muted);line-height:1.8}
/* ===== Misconceptions ===== */
.mis-row{
  display:grid;grid-template-columns:minmax(0,1fr) 46px minmax(0,1fr);
  align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:18px 22px;min-width:0;
}
.mis-row + .mis-row{margin-top:14px}
.mis-left{font-size:14.5px;line-height:1.75;color:var(--muted)}
.mis-left b,.mis-right b{display:block;font-size:12.5px;letter-spacing:.5px;margin-bottom:4px;font-weight:700}
.mis-left b{color:#93A3B4}
.mis-right b{color:var(--brand)}
.mis-right{font-size:14.5px;line-height:1.75;color:var(--text)}
.mis-arrow{text-align:center;color:var(--brand);font-size:18px;line-height:1}
/* ===== Related ===== */
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.rel-card{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);min-width:0;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(29,95,168,.3)}
.rel-card h3{font-size:15.5px;line-height:1.6;font-weight:700;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-card .post-time{display:block}
.rel-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
/* ===== Footer ===== */
.site-footer{background:var(--nav-bg);color:#B9C8D8;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.5fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:14px}
.footer-brand span{display:flex;flex-direction:column;line-height:1.15}
.footer-brand strong{font-size:17px;letter-spacing:.6px}
.footer-brand em{font-style:normal;font-size:11px;letter-spacing:3px;color:var(--neon);margin-top:2px}
.footer-about p{font-size:13.5px;line-height:1.85;color:#9FB2C6}
.footer-col{min-width:0}
.footer-col h3{font-size:14px;color:#fff;font-weight:700;letter-spacing:.5px;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-links a{font-size:13.5px;color:#9FB2C6;transition:color .22s ease}
.footer-links a:hover{color:var(--neon)}
.footer-note{font-size:12.5px;line-height:1.85;color:#8FA3B7}
.footer-note strong{display:block;color:#E7B269;font-weight:600;margin-bottom:4px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);margin-top:44px;padding:18px 0;
  font-size:12.5px;color:#7A8DA1;text-align:center;
}
/* ===== Responsive ===== */
@media (max-width:1100px){
  .quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tl{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tl-item::after{display:none}
}
@media (max-width:991px){
  .nav-toggle{display:inline-flex}
  .nav-panel{
    position:fixed;left:0;right:0;top:70px;bottom:0;
    background:#0A1424;z-index:190;flex-direction:column;align-items:stretch;
    gap:10px;padding:22px 24px 40px;overflow-y:auto;display:none;
  }
  .nav-panel.is-open{display:flex}
  .site-nav{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{padding:13px 10px;font-size:16px;border-bottom:1px solid rgba(255,255,255,.06);border-radius:0}
  .nav-link.active::after{display:none}
  .nav-actions{flex-direction:column;align-items:stretch;gap:10px;margin-top:14px}
  .nav-actions .btn{width:100%}
  .page-hero-inner{grid-template-columns:minmax(0,1fr)}
  .hero-badge{display:none}
  .cat-layout{grid-template-columns:minmax(0,1fr)}
  .aside-sticky{position:static}
  .lever-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:48px 0}
  .page-hero{padding:32px 0 36px}
  .page-hero h1{font-size:26px}
  .sec-title{font-size:22px}
  .quick-grid{grid-template-columns:minmax(0,1fr)}
  .rel-grid{grid-template-columns:minmax(0,1fr)}
  .tl{grid-template-columns:minmax(0,1fr)}
  .mis-row{grid-template-columns:minmax(0,1fr);padding:18px}
  .mis-arrow{transform:rotate(90deg);padding:4px 0}
  .post-card{padding:18px}
  .bar-row{grid-template-columns:58px minmax(0,1fr) 46px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px}
  .rel-actions .btn{flex:1 1 auto}
}
@media (max-width:520px){
  .page-hero h1{font-size:23px}
  .post-title{font-size:17px}
  .eval-opts{flex-direction:column;align-items:stretch}
  .eval-opt{width:100%}
}