/* roulang page: index */
:root{
  --n1:#0e7268;
  --n2:#c98a2b;
  --bgx:#f6f5f1;
  --fgx:#15211f;
  --mut:#5e6d69;
  --lnx:#e3e1d8;
  --rad:14px;
  --shd:0 8px 24px rgba(16,48,43,.07);
  --gap:26px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bgx);color:var(--fgx);
  font:16px/1.75 "PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
input,button{font:inherit}

/* ---- 顶栏 ---- */
.vwhv-hd{position:sticky;top:0;z-index:60;background:rgba(246,245,241,.94);border-bottom:1px solid var(--lnx);backdrop-filter:blur(12px)}
.vwhv-hd-in{max-width:1180px;margin:0 auto;padding:0 24px;height:68px;display:flex;align-items:center;gap:20px}
.vwhv-logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;letter-spacing:.4px;white-space:nowrap}
.vwhv-logo span{width:32px;height:32px;border-radius:10px;background:linear-gradient(140deg,#12897c,#0b5d55);color:#fff;display:grid;place-items:center;font-size:15px;flex:0 0 auto}
.vwhv-logo:focus-visible{outline:2px solid var(--n1);outline-offset:4px;border-radius:8px}
.vwhv-nav{margin-left:auto;display:flex;align-items:center;gap:2px}
.vwhv-nav a{padding:10px 13px;border-radius:10px;font-size:15px;color:#3d4b47;min-height:44px;display:flex;align-items:center;transition:background .2s,color .2s}
.vwhv-nav a:hover,.vwhv-nav a:focus-visible{background:#e6ebe7;color:var(--n1)}

/* ---- 首屏 ---- */
.vwhv-hero{position:relative;overflow:hidden;background:#08201d;color:#eaf2ef}
.vwhv-hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.32}
.vwhv-hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(100deg,rgba(8,32,29,.94) 0%,rgba(8,32,29,.78) 55%,rgba(8,32,29,.58) 100%)}
.vwhv-hero-in{position:relative;z-index:2;max-width:1180px;margin:0 auto;padding:66px 24px 70px;display:grid;grid-template-columns:1.12fr .88fr;gap:48px;align-items:center}
.vwhv-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:1px;color:#9fd3c9;border:1px solid rgba(159,211,201,.35);border-radius:99px;padding:5px 14px;margin-bottom:20px}
.vwhv-hero h1{font-size:44px;letter-spacing:-.5px;color:#fff}
.vwhv-hero h1 em{font-style:normal;color:#f0b862}
.vwhv-hero-lead{margin-top:20px;font-size:16px;color:#c3d6d1;line-height:1.8}
.vwhv-acts{margin-top:28px;display:flex;gap:14px;flex-wrap:wrap}
.vwhv-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:11px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .2s,background .2s,color .2s}
.vwhv-btn:hover{transform:translateY(-1px)}
.vwhv-btn:focus-visible{outline:2px solid #f0b862;outline-offset:3px}
.vwhv-btn-a{background:#f0b862;color:#1b1a12;border-color:#f0b862}
.vwhv-btn-a:hover{background:#e8a844;border-color:#e8a844}
.vwhv-btn-o{background:transparent;color:#e7f1ee;border-color:rgba(231,241,238,.4)}
.vwhv-btn-o:hover{background:rgba(255,255,255,.1)}
.vwhv-dossier{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.18);border-radius:18px;padding:16px;backdrop-filter:blur(6px)}
.vwhv-dossier h3{margin-top:14px;font-size:17px;color:#fff}
.vwhv-toc{margin-top:12px;display:grid;gap:8px}
.vwhv-toc li{display:flex;gap:10px;font-size:14px;color:#c9d9d4;line-height:1.55}
.vwhv-toc li::before{content:"";width:5px;height:5px;border-radius:50%;background:#f0b862;margin-top:8px;flex:0 0 auto}

/* ---- 通用 ---- */
.vwhv-thumb{position:relative;overflow:hidden;background:#dfe4e0;display:block}
.vwhv-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.vwhv-card:hover .vwhv-thumb img{transform:scale(1.05)}
.vwhv-tagb{position:absolute;left:10px;top:10px;background:rgba(12,41,38,.84);color:#eaf2ef;font-size:12px;line-height:1;padding:6px 10px;border-radius:99px;letter-spacing:.5px}
.vwhv-dossier .vwhv-thumb{aspect-ratio:16/9;border-radius:12px}

.vwhv-sec{padding:62px 0}
.vwhv-sec.alt{background:#fff;border-top:1px solid var(--lnx);border-bottom:1px solid var(--lnx)}
.vwhv-in{max-width:1180px;margin:0 auto;padding:0 24px}
.vwhv-head{margin-bottom:32px;max-width:760px}
.vwhv-head h2{font-size:29px;letter-spacing:-.3px}
.vwhv-head h2 strong{color:var(--n1);font-weight:700}
.vwhv-head p{margin-top:10px;color:var(--mut);font-size:15.5px}

.vwhv-g3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.vwhv-g4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.vwhv-g2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}

.vwhv-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--lnx);border-radius:var(--rad);overflow:hidden;box-shadow:var(--shd);transition:transform .25s,box-shadow .25s}
.vwhv-card:hover{transform:translateY(-3px);box-shadow:0 16px 32px rgba(16,48,43,.12)}
.vwhv-card .vwhv-thumb{aspect-ratio:16/10}
.vwhv-cb{padding:16px 17px 20px;display:flex;flex-direction:column;gap:9px;flex:1}
.vwhv-cb h3{font-size:17px}
.vwhv-cb p{font-size:14.5px;color:var(--mut);line-height:1.65}

/* 要点条 */
.vwhv-brief{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.vwhv-brief li{background:#fff;border:1px solid var(--lnx);border-radius:12px;padding:16px 15px;font-size:14px;color:#3d4b47;line-height:1.6}
.vwhv-brief b{display:block;font-size:13px;color:var(--n1);letter-spacing:.6px;margin-bottom:6px}

/* 步骤 */
.vwhv-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.vwhv-step{background:#fff;border:1px solid var(--lnx);border-radius:var(--rad);padding:22px 20px}
.vwhv-step i{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:#e8f1ee;color:var(--n1);font-style:normal;font-weight:700;font-size:15px;margin-bottom:12px}
.vwhv-step h3{font-size:16.5px;margin-bottom:6px}
.vwhv-step p{font-size:14px;color:var(--mut)}

/* 列表 */
.vwhv-rows{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.vwhv-row{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--lnx);border-radius:12px;padding:16px 18px;transition:border-color .2s,transform .2s}
.vwhv-row:hover{border-color:#bcd3cc;transform:translateY(-2px)}
.vwhv-num{font-size:15px;font-weight:700;color:var(--n2);flex:0 0 auto;line-height:1.5}
.vwhv-row h3{font-size:15.5px;margin-bottom:4px}
.vwhv-row p{font-size:13.8px;color:var(--mut);line-height:1.6}
.vwhv-tag{margin-left:auto;flex:0 0 auto;font-size:12px;color:#0e7268;background:#e8f1ee;border-radius:99px;padding:3px 10px;line-height:1.5}

/* 分类频道 */
.vwhv-chips{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.vwhv-chip{background:#fff;border:1px solid var(--lnx);border-radius:12px;padding:16px 18px}
.vwhv-chip span{display:inline-block;font-size:15px;font-weight:700;color:var(--n1);margin-bottom:6px}
.vwhv-chip p{font-size:14px;color:var(--mut)}

/* 排行 */
.vwhv-rank{display:grid;grid-template-columns:repeat(2,1fr);gap:0 26px}
.vwhv-rank li{display:flex;align-items:center;gap:12px;padding:13px 0;border-bottom:1px dashed var(--lnx);font-size:15px}
.vwhv-rk{width:26px;flex:0 0 auto;font-weight:700;font-size:14px;color:#9aa8a4}
.vwhv-rank li:nth-child(-n+3) .vwhv-rk{color:var(--n2)}
.vwhv-rkname{flex:1}

/* 说明卡 */
.vwhv-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.vwhv-note{background:#fff;border:1px solid var(--lnx);border-left:3px solid var(--n1);border-radius:12px;padding:18px 20px}
.vwhv-note h3{font-size:16px;margin-bottom:6px}
.vwhv-note p{font-size:14px;color:var(--mut)}

/* 资讯 */
.vwhv-news{border-top:1px solid var(--lnx)}
.vwhv-news li{display:flex;align-items:center;gap:16px;padding:16px 2px;border-bottom:1px solid var(--lnx);font-size:15.5px}
.vwhv-news .vwhv-when{font-size:13px;color:#94a29e;flex:0 0 58px}
.vwhv-news h3{font-size:15.5px;font-weight:500}

/* 问答 */
.vwhv-faq{display:grid;gap:14px;max-width:920px}
.vwhv-faq details{background:#fff;border:1px solid var(--lnx);border-radius:12px;padding:16px 20px}
.vwhv-faq summary{cursor:pointer;font-weight:600;font-size:16px;list-style:none;display:flex;justify-content:space-between;gap:12px;align-items:center}
.vwhv-faq summary::-webkit-details-marker{display:none}
.vwhv-faq summary::after{content:"+";color:var(--n1);font-weight:700;font-size:18px;line-height:1}
.vwhv-faq details[open] summary::after{content:"–"}
.vwhv-faq p{margin-top:10px;font-size:14.5px;color:var(--mut);line-height:1.75}

/* 风险条 */
.vwhv-warn{background:#1a1512;color:#e8d9c8;padding:26px 0}
.vwhv-warn .vwhv-in{display:flex;gap:16px;align-items:flex-start;font-size:14.5px;line-height:1.75}
.vwhv-warn strong{color:#f0b862;flex:0 0 auto;letter-spacing:.5px}

/* 收口 */
.vwhv-end{position:relative;overflow:hidden;background:#08201d;color:#eaf2ef;padding:64px 0;text-align:center}
.vwhv-end-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.18}
.vwhv-end .vwhv-in{position:relative;z-index:2}
.vwhv-end h2{font-size:30px;color:#fff;letter-spacing:-.3px}
.vwhv-end p{margin:14px auto 26px;max-width:640px;color:#c3d6d1;font-size:15.5px}

/* 页脚 */
.vwhv-ft{background:#07211e;color:#a9bdb7;padding:52px 0 0}
.vwhv-ft-cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:36px}
.vwhv-ft h4{font-size:15px;color:#eaf2ef;margin-bottom:14px}
.vwhv-ft p{font-size:14px;line-height:1.78}
.vwhv-ft li{margin-bottom:10px;font-size:14px}
.vwhv-ft a{color:#a9bdb7;transition:color .2s}
.vwhv-ft a:hover,.vwhv-ft a:focus-visible{color:#f0b862}
.vwhv-ft .vwhv-logo{color:#eaf2ef;font-size:17px;margin-bottom:12px}
.vwhv-cp{border-top:1px solid #17332e;padding:18px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:#7f9691;max-width:1180px;margin:0 auto;padding-left:24px;padding-right:24px}

@media (max-width:1024px){
  .vwhv-hero-in{grid-template-columns:1fr;gap:36px;padding:52px 24px 58px}
  .vwhv-hero h1{font-size:36px}
  .vwhv-g3,.vwhv-notes,.vwhv-chips{grid-template-columns:repeat(2,1fr)}
  .vwhv-flow,.vwhv-brief{grid-template-columns:repeat(2,1fr)}
  .vwhv-ft-cols{grid-template-columns:1fr 1fr;gap:26px}
  .vwhv-nav a{padding:9px 10px;font-size:14px}
  .vwhv-head h2{font-size:26px}
}

@media (max-width:768px){
  .vwhv-hd-in{height:auto;padding:10px 18px;flex-wrap:wrap;gap:6px}
  .vwhv-nav{margin-left:0;width:100%;overflow-x:auto;gap:2px;padding-bottom:4px}
  .vwhv-nav a{white-space:nowrap;font-size:14px}
  .vwhv-sec{padding:44px 0}
  .vwhv-head h2{font-size:23px}
  .vwhv-g3,.vwhv-g4,.vwhv-g2,.vwhv-notes,.vwhv-chips,.vwhv-rows,.vwhv-rank{grid-template-columns:1fr}
  .vwhv-cb p,.vwhv-row p,.vwhv-note p,.vwhv-chip p,.vwhv-step p{font-size:14px}
  .vwhv-news li{flex-wrap:wrap;gap:6px 14px;align-items:flex-start}
  .vwhv-news .vwhv-when{flex:0 0 auto}
  .vwhv-warn .vwhv-in{flex-direction:column;gap:8px}
  .vwhv-end h2{font-size:24px}
  .vwhv-end{padding:48px 0}
}

@media (max-width:520px){
  body{font-size:15px}
  .vwhv-hero h1{font-size:27px;line-height:1.32}
  .vwhv-hero-lead{font-size:15px}
  .vwhv-hero-in{padding:40px 18px 46px}
  .vwhv-acts{flex-direction:column;align-items:stretch}
  .vwhv-btn{width:100%}
  .vwhv-flow,.vwhv-brief{grid-template-columns:1fr}
  .vwhv-ft-cols{grid-template-columns:1fr}
  .vwhv-head h2{font-size:21px}
  .vwhv-sec{padding:36px 0}
  .vwhv-cp{justify-content:flex-start}
}