/* roulang page: index */
:root{
  --ink:#16202b;
  --ink-soft:#4d5c6b;
  --ink-mute:#7d8b99;
  --accent:#2f9e8f;
  --accent-deep:#1f7d70;
  --accent-soft:#e6f4f1;
  --gold:#c2954a;
  --gold-soft:#f7efe1;
  --bg:#f7f5f1;
  --surface:#ffffff;
  --surface-2:#fbfaf7;
  --line:#e6e2da;
  --line-strong:#d6d0c5;
  --radius-lg:14px;
  --radius-md:10px;
  --radius-sm:8px;
  --shadow-xs:0 1px 2px rgba(22,32,43,.05);
  --shadow-sm:0 4px 14px rgba(22,32,43,.06);
  --shadow-md:0 14px 34px rgba(22,32,43,.12);
  --ease:.2s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 14px}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.28}
button,input,textarea,select{font-family:inherit;font-size:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid rgba(47,158,143,.55);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.container--narrow{max-width:900px}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,241,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-stuck{box-shadow:0 6px 22px rgba(22,32,43,.09);background:rgba(255,255,255,.96)}
.nav-bar{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;min-height:68px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.02em;color:var(--ink)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--accent),var(--accent-deep));
  display:grid;place-items:center;color:#fff;font-size:15px;font-weight:800;
  box-shadow:0 4px 12px rgba(31,125,112,.28);
}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--ink-mute);letter-spacing:.14em}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  display:inline-flex;align-items:center;min-height:40px;padding:0 13px;
  border-radius:var(--radius-sm);font-size:14.5px;color:var(--ink-soft);
  transition:color var(--ease),background var(--ease);
}
.nav-links a:hover{color:var(--accent-deep);background:var(--accent-soft)}
.nav-links a.is-active{color:var(--accent-deep);font-weight:700;background:var(--accent-soft)}
.nav-cta{display:flex;align-items:center;gap:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:42px;padding:0 20px;border-radius:var(--radius-sm);
  font-size:14.5px;font-weight:600;border:1px solid transparent;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(31,125,112,.24)}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-2px);box-shadow:0 10px 22px rgba(31,125,112,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-deep);background:#fff;transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.4)}
.btn-light:hover{background:rgba(255,255,255,.24);transform:translateY(-2px)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
  background:#fff;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{display:block;padding:13px 24px;font-size:15px;color:var(--ink-soft);border-bottom:1px solid var(--line)}
.mobile-drawer a:last-child{border-bottom:0}
.mobile-drawer a.is-active{color:var(--accent-deep);font-weight:700;background:var(--accent-soft)}

/* hero */
.hero{
  position:relative;overflow:hidden;
  background:#101a22 url("/assets/images/好体育---竞技规则百科全书与教学.webp") center/cover no-repeat;
  color:#fff;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(11,20,27,.94) 0%,rgba(11,20,27,.86) 46%,rgba(11,20,27,.55) 100%);
}
.hero-inner{position:relative;z-index:2;padding:82px 0 76px;display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:12.5px;letter-spacing:.1em;
  background:rgba(47,158,143,.18);color:#8fe0d3;border:1px solid rgba(47,158,143,.4);
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:#5ec9b9;display:block}
.hero h1{font-size:42px;line-height:1.24;margin:20px 0 18px;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:#7fdccd}
.hero-lead{font-size:15.5px;line-height:1.85;color:rgba(255,255,255,.82);max-width:600px;margin-bottom:24px}
.hero-points{display:grid;gap:10px;margin-bottom:28px;max-width:560px}
.hero-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:rgba(255,255,255,.9)}
.hero-points li::before{
  content:"";flex:0 0 auto;width:18px;height:18px;margin-top:4px;border-radius:50%;
  background:rgba(47,158,143,.24);border:1px solid rgba(94,201,185,.7);
  box-shadow:inset 0 0 0 4px rgba(47,158,143,.18);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;font-size:12.5px;
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.22);color:rgba(255,255,255,.86);
}
.countdown-card{
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.18);
  border-radius:18px;
  padding:26px 24px 24px;
  backdrop-filter:blur(8px);
  box-shadow:0 22px 48px rgba(0,0,0,.28);
}
.countdown-card h3{font-size:16px;color:#fff;margin-bottom:4px}
.countdown-card p{font-size:13px;color:rgba(255,255,255,.62);margin-bottom:18px}
.ring-wrap{display:flex;align-items:center;gap:18px}
.ring{position:relative;width:132px;height:132px;flex:0 0 auto}
.ring svg{transform:rotate(-90deg);display:block}
.ring-track{fill:none;stroke:rgba(255,255,255,.14);stroke-width:9}
.ring-bar{fill:none;stroke:#5ec9b9;stroke-width:9;stroke-linecap:round;transition:stroke-dashoffset 1s linear}
.ring-label{
  position:absolute;inset:0;display:grid;place-content:center;text-align:center;
}
.ring-label strong{display:block;font-size:26px;letter-spacing:-.02em;color:#fff;line-height:1.1}
.ring-label span{font-size:11px;letter-spacing:.16em;color:rgba(255,255,255,.6)}
.count-nums{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;flex:1}
.count-nums div{
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);
  border-radius:10px;padding:8px 4px;text-align:center;
}
.count-nums strong{display:block;font-size:18px;color:#fff;line-height:1.2}
.count-nums span{font-size:11px;color:rgba(255,255,255,.58)}
.countdown-note{
  margin-top:18px;padding-top:16px;border-top:1px dashed rgba(255,255,255,.2);
  font-size:12.5px;color:rgba(255,255,255,.7);line-height:1.7;
}

/* sections */
.section{padding:72px 0}
.section--alt{background:var(--surface)}
.section--tight{padding:56px 0}
.section-head{max-width:720px;margin-bottom:34px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;
  letter-spacing:.14em;color:var(--accent-deep);text-transform:uppercase;margin-bottom:12px;
}
.kicker::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px}
.section-head.center .kicker::before{display:none}
.section-title{font-size:29px;letter-spacing:-.02em;margin-bottom:12px}
.section-desc{font-size:15px;color:var(--ink-soft);line-height:1.82;margin:0}

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

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;box-shadow:var(--shadow-xs);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cfd9d6}
.card-icon{
  width:42px;height:42px;border-radius:11px;background:var(--accent-soft);
  display:grid;place-items:center;margin-bottom:16px;color:var(--accent-deep);
}
.card-icon svg{width:21px;height:21px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.card h3{font-size:17px;margin-bottom:9px}
.card p{font-size:14px;color:var(--ink-soft);line-height:1.78;margin:0}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.chip{
  display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;
  font-size:12px;background:var(--surface-2);border:1px solid var(--line);color:var(--ink-soft);
}
.chip--accent{background:var(--accent-soft);border-color:#cbe9e3;color:var(--accent-deep);font-weight:600}
.chip--gold{background:var(--gold-soft);border-color:#ecdcbd;color:#8f6a24;font-weight:600}

.figure-card{overflow:hidden;padding:0}
.figure-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.figure-body{padding:20px 22px 22px}
.figure-body h3{font-size:16.5px;margin-bottom:8px}
.figure-body p{font-size:13.8px;color:var(--ink-soft);margin:0}

/* coverage strip */
.coverage-band{background:var(--surface);border-bottom:1px solid var(--line)}
.coverage-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:44px;align-items:center;padding:64px 0}
.region-list{display:grid;gap:14px}
.region-item{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 18px;border:1px solid var(--line);border-radius:var(--radius-md);
  background:var(--surface-2);transition:border-color var(--ease),background var(--ease);
}
.region-item:hover{border-color:#cbe9e3;background:#fff}
.region-item strong{font-size:14.5px;font-weight:600}
.region-item span{font-size:12.5px;color:var(--ink-mute)}
.region-item b{font-size:13px;color:var(--accent-deep);font-weight:700;white-space:nowrap}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:22px}
.stat{
  background:var(--accent-soft);border:1px solid #cfeae5;border-radius:var(--radius-md);
  padding:16px 14px;text-align:center;
}
.stat strong{display:block;font-size:23px;color:var(--accent-deep);letter-spacing:-.02em;line-height:1.2}
.stat span{font-size:12.5px;color:var(--ink-soft)}

/* scene / scenario cards */
.scene-card{display:flex;gap:18px;align-items:flex-start}
.scene-index{
  flex:0 0 auto;width:44px;height:44px;border-radius:12px;
  display:grid;place-items:center;font-weight:800;font-size:15px;
  background:var(--gold-soft);color:#8f6a24;border:1px solid #ecdcbd;
}
.scene-card h3{font-size:16.5px;margin-bottom:8px}
.scene-card p{font-size:14px;color:var(--ink-soft);margin:0}

/* localization split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}
.split-media{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--line)}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.feature-list{display:grid;gap:16px;margin-top:22px}
.feature-item{display:flex;gap:14px;align-items:flex-start}
.feature-dot{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;background:var(--accent-soft);
  display:grid;place-items:center;color:var(--accent-deep);margin-top:3px;
}
.feature-dot svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.feature-item h4{font-size:15px;margin-bottom:4px}
.feature-item p{font-size:13.8px;color:var(--ink-soft);margin:0}

/* rules */
.rule-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.rule-card{
  background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent);
  border-radius:var(--radius-md);padding:20px 22px;box-shadow:var(--shadow-xs);
  transition:box-shadow var(--ease),transform var(--ease);
}
.rule-card:hover{box-shadow:var(--shadow-sm);transform:translateY(-3px)}
.rule-card h3{font-size:15.5px;margin-bottom:8px}
.rule-card p{font-size:13.8px;color:var(--ink-soft);margin:0}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;counter-reset:step}
.step{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:26px 24px 24px;box-shadow:var(--shadow-xs);
  transition:transform var(--ease),box-shadow var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.step::before{
  counter-increment:step;content:"0" counter(step);
  position:absolute;top:-14px;left:24px;
  background:var(--accent);color:#fff;font-size:12.5px;font-weight:700;
  padding:4px 12px;border-radius:999px;letter-spacing:.08em;
}
.step h3{font-size:16.5px;margin:10px 0 9px}
.step p{font-size:14px;color:var(--ink-soft);margin:0}

/* dark band */
.band-dark{background:#101a22;color:#fff}
.band-dark .section-title{color:#fff}
.band-dark .section-desc{color:rgba(255,255,255,.72)}
.band-dark .kicker{color:#7fdccd}
.band-dark .kicker::before{background:#5ec9b9}
.dark-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius-lg);padding:24px;transition:background var(--ease),transform var(--ease),border-color var(--ease);
}
.dark-card:hover{background:rgba(255,255,255,.1);transform:translateY(-4px);border-color:rgba(94,201,185,.5)}
.dark-card h3{font-size:16.5px;color:#fff;margin-bottom:9px}
.dark-card p{font-size:13.8px;color:rgba(255,255,255,.72);margin:0}
.dark-card .chip{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.2);color:rgba(255,255,255,.82)}

/* metrics */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.metric{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px 20px;text-align:left;box-shadow:var(--shadow-xs);
}
.metric strong{display:block;font-size:30px;letter-spacing:-.03em;color:var(--accent-deep);line-height:1.15}
.metric span{display:block;font-size:13.5px;color:var(--ink-soft);margin-top:6px}

/* cases */
.case-card{display:flex;flex-direction:column;gap:14px}
.case-top{display:flex;align-items:center;gap:12px}
.avatar{
  width:42px;height:42px;border-radius:50%;flex:0 0 auto;
  background:linear-gradient(140deg,#3a4a58,#1f2c37);color:#fff;
  display:grid;place-items:center;font-size:14px;font-weight:700;
}
.case-top strong{font-size:14.5px;display:block}
.case-top span{font-size:12.5px;color:var(--ink-mute)}
.case-card p{font-size:14px;color:var(--ink-soft);margin:0}

/* category wall */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cat-card{
  position:relative;display:flex;flex-direction:column;gap:12px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px 24px 24px;box-shadow:var(--shadow-xs);overflow:hidden;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.cat-card::after{
  content:"";position:absolute;right:-40px;top:-40px;width:120px;height:120px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,158,143,.14),transparent 70%);
}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cbe9e3}
.cat-card h3{font-size:18px}
.cat-card p{font-size:13.8px;color:var(--ink-soft);margin:0}
.cat-link{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:700;color:var(--accent-deep);margin-top:4px}
.cat-link svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;transition:transform var(--ease)}
.cat-card:hover .cat-link svg{transform:translateX(4px)}

/* news */
.news-layout{display:grid;grid-template-columns:1.55fr 1fr;gap:26px;align-items:start}
.post-list{display:grid;gap:14px}
.post-card{
  display:block;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-md);padding:18px 20px;box-shadow:var(--shadow-xs);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:#cbe9e3}
.post-card h3{font-size:15.5px;margin-bottom:7px;line-height:1.5}
.post-card p{font-size:13.5px;color:var(--ink-soft);margin:0 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--ink-mute);flex-wrap:wrap}
.post-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--line-strong)}
.side-panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;box-shadow:var(--shadow-xs);
}
.side-panel h3{font-size:16px;margin-bottom:14px}
.side-list{display:grid;gap:12px}
.side-list li{display:flex;gap:10px;font-size:13.8px;color:var(--ink-soft);line-height:1.7}
.side-list li b{color:var(--accent-deep);font-weight:700;flex:0 0 auto}
.empty-note{
  background:var(--surface-2);border:1px dashed var(--line-strong);border-radius:var(--radius-md);
  padding:26px;text-align:center;color:var(--ink-mute);font-size:14px;
}

/* quotes */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.quote{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;box-shadow:var(--shadow-xs);position:relative;
  transition:transform var(--ease),box-shadow var(--ease);
}
.quote:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.quote::before{
  content:"“";position:absolute;top:10px;right:20px;font-size:44px;color:var(--accent-soft);
  font-family:Georgia,serif;line-height:1;
}
.quote p{font-size:14px;color:var(--ink-soft);margin:0 0 14px}
.quote-footer{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-mute)}
.quote-footer b{color:var(--ink);font-size:13.5px}

/* assurance */
.assure-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;box-shadow:var(--shadow-xs);
}
.assure-item{display:flex;gap:12px;align-items:flex-start}
.assure-item svg{width:20px;height:20px;flex:0 0 auto;margin-top:3px;stroke:var(--accent-deep);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.assure-item strong{display:block;font-size:14.5px;margin-bottom:3px}
.assure-item span{font-size:13px;color:var(--ink-soft)}

/* contact */
.contact-wrap{
  background:var(--surface);border:1px solid var(--line);border-radius:18px;
  box-shadow:var(--shadow-sm);overflow:hidden;
  display:grid;grid-template-columns:1fr 1fr;
}
.contact-info{padding:40px 38px;background:linear-gradient(150deg,#14202a,#1d3038);color:#fff}
.contact-info h2{font-size:26px;margin-bottom:12px}
.contact-info p{font-size:14.2px;color:rgba(255,255,255,.74);margin-bottom:22px}
.contact-points{display:grid;gap:12px}
.contact-points li{display:flex;gap:10px;font-size:14px;color:rgba(255,255,255,.86)}
.contact-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:#5ec9b9;margin-top:9px;flex:0 0 auto}
.contact-form{padding:40px 38px}
.contact-form h3{font-size:19px;margin-bottom:6px}
.contact-form p.form-tip{font-size:13.5px;color:var(--ink-mute);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:6px;color:var(--ink)}
.field input,.field textarea,.field select{
  width:100%;padding:11px 14px;border:1px solid var(--line-strong);border-radius:var(--radius-sm);
  background:var(--surface-2);color:var(--ink);font-size:14px;line-height:1.6;
  transition:border-color var(--ease),background var(--ease),box-shadow var(--ease);
}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(47,158,143,.14);
}
.field textarea{min-height:96px;resize:vertical}
.form-note{font-size:12.5px;color:var(--ink-mute);margin-top:12px;line-height:1.7}
.form-feedback{
  display:none;margin-top:14px;padding:11px 14px;border-radius:var(--radius-sm);
  background:var(--accent-soft);border:1px solid #cbe9e3;color:var(--accent-deep);font-size:13.5px;
}
.form-feedback.is-visible{display:block}

/* footer */
.site-footer{background:#0f1920;color:rgba(255,255,255,.72);padding:56px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:38px;padding-bottom:38px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;color:#fff;margin-bottom:14px}
.footer-brand .brand-mark{box-shadow:none}
.site-footer p{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.62);margin:0}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:14px;letter-spacing:.04em}
.footer-col ul{display:grid;gap:9px}
.footer-col a{font-size:13.5px;color:rgba(255,255,255,.66);transition:color var(--ease)}
.footer-col a:hover{color:#7fdccd}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:18px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.46);
}
.footer-bottom a{color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:#7fdccd}

/* responsive */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:36px;padding:64px 0 60px}
  .hero h1{font-size:35px}
  .coverage-grid,.split{grid-template-columns:1fr;gap:30px}
  .grid-4,.metric-grid{grid-template-columns:repeat(2,1fr)}
  .grid-3,.cat-grid,.quote-grid,.steps{grid-template-columns:repeat(2,1fr)}
  .news-layout{grid-template-columns:1fr}
  .assure-row{grid-template-columns:repeat(2,1fr)}
  .contact-wrap{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .nav-links{display:none}
  .nav-cta .btn-primary{display:none}
  .nav-toggle{display:inline-flex}
  .section{padding:56px 0}
  .section-title{font-size:24px}
  .hero h1{font-size:30px}
  .rule-grid{grid-template-columns:1fr}
}
@media (max-width:768px){
  .grid-2,.grid-3,.grid-4,.cat-grid,.quote-grid,.steps,.metric-grid{grid-template-columns:1fr}
  .assure-row{grid-template-columns:1fr}
  .stat-row{grid-template-columns:repeat(3,1fr);gap:10px}
  .ring{width:112px;height:112px}
  .countdown-card{padding:22px 18px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .hero-inner{padding:48px 0 46px}
  .hero h1{font-size:25px;line-height:1.32}
  .hero-lead{font-size:14.5px}
  .btn{width:100%}
  .hero-actions{flex-direction:column;align-items:stretch}
  .count-nums{grid-template-columns:repeat(3,1fr)}
  .stat-row{grid-template-columns:1fr;gap:10px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .contact-info,.contact-form{padding:28px 20px}
  .assure-row{padding:20px}
  .section{padding:44px 0}
}

/* roulang page: article */
:root{
  --ink:#16202b;
  --ink-soft:#4d5c6b;
  --ink-mute:#7d8b99;
  --accent:#2f9e8f;
  --accent-deep:#1f7d70;
  --accent-soft:#e6f4f1;
  --gold:#c2954a;
  --gold-soft:#f7efe1;
  --bg:#f7f5f1;
  --surface:#ffffff;
  --surface-2:#fbfaf7;
  --line:#e6e2da;
  --line-strong:#d6d0c5;
  --radius-lg:14px;
  --radius-md:10px;
  --radius-sm:8px;
  --shadow-xs:0 1px 2px rgba(22,32,43,.05);
  --shadow-sm:0 4px 14px rgba(22,32,43,.06);
  --shadow-md:0 14px 34px rgba(22,32,43,.12);
  --ease:.2s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
p{margin:0 0 16px}
ul,ol{margin:0 0 16px;padding-left:20px}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.35}
button,input,textarea,select{font-family:inherit;font-size:inherit}
button{cursor:pointer}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.container--narrow{max-width:860px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,241,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-stuck{box-shadow:0 6px 22px rgba(22,32,43,.09);background:rgba(255,255,255,.96)}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.02em;color:var(--ink)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--accent),var(--accent-deep));
  display:grid;place-items:center;color:#fff;font-size:15px;font-weight:800;
  box-shadow:0 4px 12px rgba(31,125,112,.28);
}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--ink-mute);letter-spacing:.14em}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  display:inline-flex;align-items:center;min-height:40px;padding:0 13px;
  border-radius:var(--radius-sm);font-size:14.5px;color:var(--ink-soft);
  transition:color var(--ease),background var(--ease);
}
.nav-links a:hover{color:var(--accent-deep);background:var(--accent-soft)}
.nav-links a.is-active{color:var(--accent-deep);font-weight:700;background:var(--accent-soft)}
.nav-cta{display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
  background:#fff;align-items:center;justify-content:center;padding:0;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{display:block;padding:13px 24px;font-size:15px;color:var(--ink-soft);border-bottom:1px solid var(--line)}
.mobile-drawer a:last-child{border-bottom:0}
.mobile-drawer a.is-active{color:var(--accent-deep);font-weight:700;background:var(--accent-soft)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:42px;padding:0 20px;border-radius:var(--radius-sm);
  font-size:14.5px;font-weight:600;border:1px solid transparent;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(31,125,112,.24)}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-2px);box-shadow:0 10px 22px rgba(31,125,112,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-deep);background:#fff;transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.4)}
.btn-light:hover{background:rgba(255,255,255,.24);transform:translateY(-2px)}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;overflow:hidden;color:#fff;
  background:#101a22 url("/assets/images/好体育---竞技规则百科全书与教学.webp") center/cover no-repeat;
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(112deg,rgba(11,20,27,.95) 0%,rgba(11,20,27,.88) 52%,rgba(11,20,27,.62) 100%);
}
.article-hero-inner{position:relative;z-index:2;padding:56px 0 62px;max-width:860px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:rgba(255,255,255,.6);margin-bottom:20px}
.crumb a{color:rgba(255,255,255,.74);transition:color var(--ease)}
.crumb a:hover{color:#8fe0d3}
.crumb span.sep{color:rgba(255,255,255,.35)}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:12.5px;letter-spacing:.08em;
  background:rgba(47,158,143,.18);color:#8fe0d3;border:1px solid rgba(47,158,143,.4);
}
.article-hero h1{font-size:38px;line-height:1.28;margin:20px 0 18px;letter-spacing:-.02em}
.article-lead{font-size:15.5px;line-height:1.85;color:rgba(255,255,255,.8);max-width:720px;margin-bottom:22px}
.article-meta{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13px;color:rgba(255,255,255,.66)}
.article-meta span{display:inline-flex;align-items:center;gap:7px}
.article-meta i{display:block;width:6px;height:6px;border-radius:50%;background:#5ec9b9}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;font-size:12.5px;
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.22);color:rgba(255,255,255,.86);
}

/* ---------- sections ---------- */
.section{padding:66px 0}
.section--tight{padding:48px 0}
.section--alt{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:34px}
.section-head .kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;letter-spacing:.14em;color:var(--accent-deep);font-weight:700;margin-bottom:12px;
}
.section-head .kicker::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px}
.section-head h2{font-size:27px;line-height:1.35;margin-bottom:10px}
.section-head p{font-size:14.5px;color:var(--ink-soft);margin:0}

/* ---------- layout ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:44px;align-items:start}
.article-shell{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);padding:40px 42px;
}
.article-shell .prose{max-width:720px}

/* prose */
.prose{font-size:16px;line-height:1.85;color:#2a3947}
.prose h2{font-size:23px;margin:38px 0 14px;padding-left:14px;position:relative;color:var(--ink)}
.prose h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:3px;background:var(--accent)}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:18px;margin:28px 0 10px;color:var(--ink)}
.prose h4{font-size:16px;margin:22px 0 8px;color:var(--accent-deep)}
.prose p{margin:0 0 18px}
.prose strong{color:var(--ink);font-weight:700}
.prose a{color:var(--accent-deep);border-bottom:1px solid rgba(47,158,143,.4);transition:color var(--ease),border-color var(--ease)}
.prose a:hover{color:#155f56;border-color:#155f56}
.prose ul,.prose ol{padding-left:22px;margin:0 0 20px}
.prose li{margin-bottom:9px}
.prose li::marker{color:var(--accent)}
.prose blockquote{
  margin:24px 0;padding:18px 22px;border-left:4px solid var(--gold);
  background:var(--gold-soft);border-radius:0 var(--radius-md) var(--radius-md) 0;
  color:#6b5326;font-size:15px;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:var(--radius-md);margin:24px 0;box-shadow:var(--shadow-xs)}
.prose table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14.5px;display:block;overflow-x:auto}
.prose th,.prose td{border:1px solid var(--line);padding:11px 14px;text-align:left;white-space:nowrap}
.prose th{background:var(--accent-soft);color:var(--accent-deep);font-weight:700}
.prose tr:nth-child(even) td{background:var(--surface-2)}
.prose hr{border:0;border-top:1px solid var(--line);margin:32px 0}

/* sidebar */
.side{display:grid;gap:20px;position:sticky;top:88px}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);padding:22px 22px 20px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.side-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--line-strong)}
.side-card h3{font-size:15.5px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:5px;height:16px;border-radius:3px;background:var(--accent);display:block}
.side-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.side-list li{display:flex;justify-content:space-between;gap:12px;font-size:13.5px;color:var(--ink-soft);padding-bottom:10px;border-bottom:1px dashed var(--line)}
.side-list li:last-child{border-bottom:0;padding-bottom:0}
.side-list b{color:var(--ink);font-weight:700;white-space:nowrap}
.side-jump{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.side-jump a{
  display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:var(--radius-sm);
  font-size:13.5px;color:var(--ink-soft);transition:background var(--ease),color var(--ease);
}
.side-jump a::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--line-strong);transition:background var(--ease)}
.side-jump a:hover{background:var(--accent-soft);color:var(--accent-deep)}
.side-jump a:hover::before{background:var(--accent)}
.side-figure{margin:0}
.side-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-md)}
.side-figure figcaption{font-size:12.5px;color:var(--ink-mute);margin-top:10px;line-height:1.6}

/* key points */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-xs);padding:26px 24px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--line-strong)}
.card-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:10px;background:var(--accent-soft);
  color:var(--accent-deep);font-weight:800;font-size:14px;margin-bottom:16px;
}
.card h3{font-size:16.5px;margin-bottom:10px}
.card p{font-size:14px;line-height:1.78;color:var(--ink-soft);margin:0}
.card .card-tag{
  display:inline-block;margin-top:16px;padding:4px 11px;border-radius:999px;
  font-size:12px;background:var(--gold-soft);color:#8a6520;border:1px solid rgba(194,149,74,.28);
}

/* channels */
.channel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.channel{
  display:block;padding:28px 24px;border-radius:var(--radius-lg);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-xs);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease);
}
.channel:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(47,158,143,.55);background:#fff}
.channel .ch-label{font-size:12px;letter-spacing:.12em;color:var(--accent-deep);font-weight:700}
.channel h3{font-size:19px;margin:10px 0 8px}
.channel p{font-size:13.8px;line-height:1.75;color:var(--ink-soft);margin:0 0 16px}
.channel .ch-go{font-size:13.5px;font-weight:700;color:var(--accent-deep);display:inline-flex;align-items:center;gap:6px}
.channel:hover .ch-go{gap:11px}

/* faq */
.faq-list{display:grid;gap:14px;max-width:860px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);
  box-shadow:var(--shadow-xs);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item[open]{border-color:rgba(47,158,143,.5);box-shadow:var(--shadow-sm)}
.faq-item summary{
  cursor:pointer;list-style:none;padding:18px 22px;font-size:15.5px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";width:9px;height:9px;flex:0 0 auto;border-right:2px solid var(--accent);
  border-bottom:2px solid var(--accent);transform:rotate(45deg);transition:transform var(--ease);
}
.faq-item[open] summary::after{transform:rotate(-135deg)}
.faq-body{padding:0 22px 20px;font-size:14.5px;line-height:1.8;color:var(--ink-soft)}
.faq-body p:last-child{margin-bottom:0}

/* cta */
.cta-strip{
  position:relative;overflow:hidden;border-radius:18px;color:#fff;
  background:linear-gradient(125deg,#12212a 0%,#17323a 58%,#1c4a47 100%);
  padding:46px 44px;display:flex;flex-wrap:wrap;justify-content:space-between;
  align-items:center;gap:26px;box-shadow:var(--shadow-md);
}
.cta-strip::before{
  content:"";position:absolute;right:-60px;top:-70px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,158,143,.4),transparent 68%);
}
.cta-strip h2{font-size:25px;margin-bottom:10px;position:relative;z-index:2}
.cta-strip p{font-size:14.5px;color:rgba(255,255,255,.76);margin:0;max-width:560px;position:relative;z-index:2}
.cta-strip .cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:12px}

/* empty state */
.empty-state{text-align:center;padding:36px 10px 20px}
.empty-state h2{font-size:22px;margin-bottom:12px}
.empty-state p{color:var(--ink-soft);font-size:14.5px;margin-bottom:22px}

/* footer */
.site-footer{background:#101a22;color:rgba(255,255,255,.72);padding:58px 0 0;margin-top:10px;border-top:1px solid rgba(255,255,255,.08)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;padding-bottom:38px}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:#fff;margin-bottom:14px}
.footer-brand .brand-mark{box-shadow:none}
.site-footer p{font-size:13.8px;line-height:1.85;color:rgba(255,255,255,.62);margin:0}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:14px;letter-spacing:.04em}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.footer-col a{font-size:13.8px;color:rgba(255,255,255,.66);transition:color var(--ease)}
.footer-col a:hover{color:#8fe0d3}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12.8px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.72)}
.footer-bottom a:hover{color:#8fe0d3}

/* responsive */
@media (max-width:1024px){
  .article-layout{grid-template-columns:1fr;gap:34px}
  .side{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3,.channel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .article-hero h1{font-size:32px}
}
@media (max-width:820px){
  .nav-links{display:none}
  .nav-cta .btn-ghost{display:none}
  .nav-toggle{display:inline-flex}
  .article-shell{padding:28px 22px}
  .section{padding:52px 0}
  .section-head h2{font-size:23px}
}
@media (max-width:680px){
  .container{padding:0 18px}
  .article-hero-inner{padding:40px 0 46px}
  .article-hero h1{font-size:26px;line-height:1.35}
  .article-lead{font-size:14.5px}
  .grid-3,.channel-grid{grid-template-columns:1fr}
  .side{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .cta-strip{padding:32px 24px}
  .cta-strip h2{font-size:21px}
  .hero-tags{gap:8px}
  .brand{font-size:17px}
  .nav-bar{min-height:62px;gap:12px}
  .nav-cta .btn{padding:0 14px;font-size:13.5px;min-height:38px}
  .prose{font-size:15.5px}
  .prose h2{font-size:20px}
}
@media (max-width:400px){
  .article-hero h1{font-size:23px}
  .article-meta{font-size:12px;gap:8px 16px}
}

/* roulang page: category1 */
:root{
 --ink:#16202b;
 --ink-soft:#4d5c6b;
 --ink-mute:#7d8b99;
 --accent:#2f9e8f;
 --accent-deep:#1f7d70;
 --accent-soft:#e6f4f1;
 --gold:#c2954a;
 --gold-soft:#f7efe1;
 --bg:#f7f5f1;
 --surface:#ffffff;
 --surface-2:#fbfaf7;
 --line:#e6e2da;
 --line-strong:#d6d0c5;
 --radius-lg:14px;
 --radius-md:10px;
 --radius-sm:8px;
 --shadow-xs:0 1px 2px rgba(22,32,43,.05);
 --shadow-sm:0 4px 14px rgba(22,32,43,.06);
 --shadow-md:0 14px 34px rgba(22,32,43,.12);
 --ease:.2s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
 margin:0;
 background:var(--bg);
 color:var(--ink);
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;
 line-height:1.75;
 -webkit-font-smoothing:antialiased;
 text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font-family:inherit;font-size:inherit}
button{cursor:pointer}
p{margin:0 0 14px}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.3}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.container--narrow{max-width:900px}
:focus-visible{outline:2px solid var(--accent-deep);outline-offset:3px;border-radius:4px}

/* header */
.site-header{
 position:sticky;top:0;z-index:60;
 background:rgba(247,245,241,.92);
 backdrop-filter:blur(12px);
 border-bottom:1px solid var(--line);
 transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-stuck{box-shadow:0 6px 22px rgba(22,32,43,.09);background:rgba(255,255,255,.96)}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.02em;color:var(--ink)}
.brand-mark{
 width:34px;height:34px;border-radius:10px;flex:0 0 auto;
 background:linear-gradient(140deg,var(--accent),var(--accent-deep));
 display:grid;place-items:center;color:#fff;font-size:15px;font-weight:800;
 box-shadow:0 4px 12px rgba(31,125,112,.28);
}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--ink-mute);letter-spacing:.14em}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
 display:inline-flex;align-items:center;min-height:40px;padding:0 13px;
 border-radius:var(--radius-sm);font-size:14.5px;color:var(--ink-soft);
 transition:color var(--ease),background var(--ease);
}
.nav-links a:hover{color:var(--accent-deep);background:var(--accent-soft)}
.nav-links a.is-active{color:var(--accent-deep);font-weight:700;background:var(--accent-soft)}
.nav-cta{display:flex;align-items:center;gap:10px}
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 min-height:42px;padding:0 20px;border-radius:var(--radius-sm);
 font-size:14.5px;font-weight:600;border:1px solid transparent;
 transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(31,125,112,.24)}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-2px);box-shadow:0 10px 22px rgba(31,125,112,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-deep);background:#fff;transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.4)}
.btn-light:hover{background:rgba(255,255,255,.24);transform:translateY(-2px)}
.btn-block{width:100%}
.nav-toggle{
 display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
 background:#fff;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{display:block;padding:13px 24px;font-size:15px;color:var(--ink-soft);border-bottom:1px solid var(--line)}
.mobile-drawer a:last-child{border-bottom:0}
.mobile-drawer a.is-active{color:var(--accent-deep);font-weight:700;background:var(--accent-soft)}

/* hero */
.hero{
 position:relative;overflow:hidden;
 background:#101a22 url("/assets/images/五人桌欢乐炸金花单机娱乐游戏.webp") center/cover no-repeat;
 color:#fff;
}
.hero::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(105deg,rgba(11,20,27,.95) 0%,rgba(11,20,27,.87) 46%,rgba(11,20,27,.6) 100%);
}
.hero-inner{
 position:relative;z-index:2;
 padding:70px 0 66px;
 display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center;
}
.eyebrow{
 display:inline-flex;align-items:center;gap:8px;
 padding:6px 14px;border-radius:999px;font-size:12.5px;letter-spacing:.1em;
 background:rgba(47,158,143,.18);color:#8fe0d3;border:1px solid rgba(47,158,143,.4);
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:#5ec9b9;display:block}
.hero h1{font-size:clamp(28px,3.6vw,40px);margin:20px 0 16px;letter-spacing:-.02em;line-height:1.28}
.hero h1 em{font-style:normal;color:#7fdccd}
.hero-lead{font-size:15.5px;line-height:1.85;color:rgba(255,255,255,.82);max-width:580px;margin-bottom:22px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag{
 display:inline-flex;align-items:center;gap:6px;
 padding:5px 13px;border-radius:999px;font-size:12.5px;
 background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.22);color:rgba(255,255,255,.86);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}

/* rule book card */
.rule-book{
 background:#fff;color:var(--ink);
 border-radius:18px;padding:20px;
 border:1px solid rgba(255,255,255,.5);
 box-shadow:0 24px 52px rgba(0,0,0,.34);
}
.rule-book-cover{position:relative;border-radius:12px;overflow:hidden;margin-bottom:16px}
.rule-book-cover img{width:100%;height:168px;object-fit:cover}
.rule-book-cover::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(180deg,rgba(11,20,27,0) 40%,rgba(11,20,27,.55) 100%);
}
.rule-book-badge{
 position:absolute;left:12px;bottom:12px;z-index:2;
 padding:4px 11px;border-radius:999px;font-size:12px;font-weight:700;
 background:rgba(255,255,255,.92);color:var(--accent-deep);
}
.rule-book h3{font-size:16.5px;margin-bottom:10px}
.book-toc{counter-reset:toc;display:grid;gap:8px;margin-bottom:16px}
.book-toc li{
 counter-increment:toc;
 display:flex;gap:10px;align-items:flex-start;
 font-size:13.5px;color:var(--ink-soft);line-height:1.6;
}
.book-toc li::before{
 content:counter(toc,decimal-leading-zero);
 flex:0 0 auto;font-size:11.5px;font-weight:800;color:var(--accent-deep);
 background:var(--accent-soft);border-radius:6px;padding:1px 6px;margin-top:2px;
}

/* sections */
.section{padding:72px 0}
.section--alt{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section--tight{padding:56px 0}
.section-head{max-width:760px;margin-bottom:34px}
.section-kicker{
 display:inline-flex;align-items:center;gap:8px;
 font-size:12.5px;font-weight:700;letter-spacing:.16em;color:var(--accent-deep);
 text-transform:uppercase;margin-bottom:10px;
}
.section-kicker::before{content:"";width:26px;height:2px;background:var(--accent);border-radius:2px}
.section-title{font-size:clamp(22px,2.6vw,29px);margin-bottom:12px}
.section-sub{font-size:15px;color:var(--ink-soft);line-height:1.8}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:22px 20px;box-shadow:var(--shadow-xs);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm);border-color:var(--line-strong)}
.stat b{display:block;font-size:26px;color:var(--accent-deep);letter-spacing:-.02em;line-height:1.2}
.stat span{display:block;margin-top:6px;font-size:13.5px;color:var(--ink-mute)}

/* cards */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:24px 22px;box-shadow:var(--shadow-xs);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
 display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cfd9d5}
.card-icon{
 width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
 background:var(--accent-soft);color:var(--accent-deep);
 font-size:14px;font-weight:800;margin-bottom:14px;
}
.card-icon--gold{background:var(--gold-soft);color:#9a6f27}
.card-title{font-size:17px;margin-bottom:8px}
.card-text{font-size:14.5px;color:var(--ink-soft);line-height:1.78}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.chip{
 display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;
 font-size:12px;color:var(--accent-deep);background:var(--accent-soft);border:1px solid #d3e9e4;
}
.chip--gold{color:#8a6420;background:var(--gold-soft);border-color:#ecdfc7}

/* rules compare */
.rule-split{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}
.rule-panel{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:24px;box-shadow:var(--shadow-xs);
}
.rule-panel h3{font-size:17px;margin-bottom:6px}
.rule-panel .panel-note{font-size:13px;color:var(--ink-mute);margin-bottom:16px}
.rule-list{display:grid;gap:10px}
.rule-list li{
 display:flex;gap:12px;align-items:flex-start;
 padding:11px 13px;border-radius:var(--radius-md);
 background:var(--surface-2);border:1px solid var(--line);
 font-size:14px;color:var(--ink-soft);line-height:1.65;
}
.rule-list li b{color:var(--ink);font-weight:700;flex:0 0 auto;min-width:72px}

/* scene */
.scene{
 display:grid;grid-template-columns:repeat(4,1fr);gap:18px;
}
.scene-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:22px 20px;box-shadow:var(--shadow-xs);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.scene-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm);border-color:var(--line-strong)}
.scene-item h3{font-size:15.5px;margin-bottom:8px}
.scene-item p{font-size:13.5px;color:var(--ink-soft);line-height:1.75}

/* channel entry */
.channel-card{
 position:relative;overflow:hidden;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 box-shadow:var(--shadow-xs);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
 display:flex;flex-direction:column;
}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--line-strong)}
.channel-card img{width:100%;height:150px;object-fit:cover}
.channel-body{padding:20px 22px 22px}
.channel-body h3{font-size:16.5px;margin-bottom:8px}
.channel-body p{font-size:13.5px;color:var(--ink-soft);line-height:1.72;margin-bottom:14px}
.channel-more{
 display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:700;
 color:var(--accent-deep);
}
.channel-more::after{content:"→";transition:transform var(--ease)}
.channel-card:hover .channel-more::after{transform:translateX(4px)}

/* steps */
.steps{display:grid;gap:14px;counter-reset:step}
.step{
 display:grid;grid-template-columns:52px 1fr;gap:18px;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:20px 22px;box-shadow:var(--shadow-xs);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.step:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:var(--line-strong)}
.step-no{
 counter-increment:step;
 width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
 background:var(--accent);color:#fff;font-weight:800;font-size:15px;
 box-shadow:0 6px 14px rgba(31,125,112,.24);
}
.step-no::before{content:counter(step)}
.step h3{font-size:16px;margin-bottom:6px}
.step p{font-size:14px;color:var(--ink-soft);line-height:1.75}

/* compare mistakes */
.mistake{display:grid;gap:12px}
.mistake-row{
 display:grid;grid-template-columns:1fr 1fr;gap:0;
 border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;
 background:var(--surface);box-shadow:var(--shadow-xs);
}
.mistake-row > div{padding:16px 18px;font-size:14px;line-height:1.7}
.mistake-row .wrong{background:#fbf3f1;color:#8a4a3c;border-right:1px solid var(--line)}
.mistake-row .right{background:#eff7f5;color:#215f56}
.mistake-row .tagline{display:block;font-size:11.5px;font-weight:800;letter-spacing:.12em;margin-bottom:4px;opacity:.75}

/* faq */
.faq{display:grid;gap:12px}
.faq-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);
 box-shadow:var(--shadow-xs);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item[open]{border-color:#cbdcd7;box-shadow:var(--shadow-sm)}
.faq-item summary{
 list-style:none;cursor:pointer;
 padding:17px 20px;font-size:15.5px;font-weight:700;color:var(--ink);
 display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
 content:"+";font-size:19px;font-weight:700;color:var(--accent-deep);
 transition:transform var(--ease);line-height:1;
}
.faq-item[open] summary::after{content:"–"}
.faq-body{padding:0 20px 18px;font-size:14.5px;color:var(--ink-soft);line-height:1.8}

/* cta */
.cta-band{
 position:relative;overflow:hidden;color:#fff;
 background:#101a22 url("/assets/images/好体育---竞技规则百科全书与教学.webp") center/cover no-repeat;
 border-radius:18px;
}
.cta-band::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(110deg,rgba(11,20,27,.95),rgba(17,44,42,.82));
}
.cta-inner{
 position:relative;z-index:2;padding:46px 40px;
 display:grid;grid-template-columns:1.1fr .9fr;gap:38px;align-items:center;
}
.cta-inner h2{font-size:clamp(21px,2.4vw,27px);margin-bottom:12px}
.cta-inner p{font-size:14.5px;color:rgba(255,255,255,.8);line-height:1.8;margin-bottom:0}
.subscribe{display:flex;gap:10px;flex-wrap:wrap}
.subscribe input{
 flex:1 1 200px;min-height:46px;padding:0 16px;border-radius:var(--radius-sm);
 border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.1);color:#fff;
 transition:border-color var(--ease),background var(--ease);
}
.subscribe input::placeholder{color:rgba(255,255,255,.6)}
.subscribe input:focus{outline:none;border-color:#7fdccd;background:rgba(255,255,255,.16)}
.form-note{font-size:12.5px;color:rgba(255,255,255,.62);margin-top:12px;margin-bottom:0}
.form-feedback{margin-top:12px;font-size:13.5px;color:#8fe0d3;min-height:20px}

/* footer */
.site-footer{background:#121a21;color:rgba(255,255,255,.72);padding:56px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;color:#fff;margin-bottom:14px}
.site-footer p{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.66);max-width:420px}
.footer-col h4{font-size:14px;color:#fff;letter-spacing:.06em;margin-bottom:14px}
.footer-col ul{display:grid;gap:9px}
.footer-col a{font-size:13.5px;color:rgba(255,255,255,.68);transition:color var(--ease)}
.footer-col a:hover{color:#8fe0d3}
.footer-bottom{
 display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
 padding-top:22px;font-size:12.5px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.68)}
.footer-bottom a:hover{color:#8fe0d3}

/* responsive */
@media (max-width:1024px){
 .hero-inner{grid-template-columns:1fr;gap:36px;padding:56px 0 54px}
 .grid-3{grid-template-columns:repeat(2,1fr)}
 .scene{grid-template-columns:repeat(2,1fr)}
 .stats{grid-template-columns:repeat(2,1fr)}
 .cta-inner{grid-template-columns:1fr;padding:36px 28px}
 .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:860px){
 .nav-links,.nav-cta{display:none}
 .nav-toggle{display:inline-flex}
 .rule-split{grid-template-columns:1fr}
 .section{padding:56px 0}
}
@media (max-width:640px){
 .container{padding:0 18px}
 .grid-3,.grid-2,.scene{grid-template-columns:1fr}
 .stats{grid-template-columns:1fr 1fr}
 .mistake-row{grid-template-columns:1fr}
 .mistake-row .wrong{border-right:0;border-bottom:1px solid var(--line)}
 .footer-grid{grid-template-columns:1fr}
 .hero-tags{margin-top:18px}
 .btn{min-height:44px}
 .section{padding:48px 0}
}

/* roulang page: category2 */
:root{
 --ink:#16202b;
 --ink-soft:#4d5c6b;
 --ink-mute:#7d8b99;
 --accent:#2f9e8f;
 --accent-deep:#1f7d70;
 --accent-soft:#e6f4f1;
 --gold:#c2954a;
 --gold-soft:#f7efe1;
 --bg:#f7f5f1;
 --surface:#ffffff;
 --surface-2:#fbfaf7;
 --line:#e6e2da;
 --line-strong:#d6d0c5;
 --radius-lg:14px;
 --radius-md:10px;
 --radius-sm:8px;
 --shadow-xs:0 1px 2px rgba(22,32,43,.05);
 --shadow-sm:0 4px 14px rgba(22,32,43,.06);
 --shadow-md:0 14px 34px rgba(22,32,43,.12);
 --ease:.2s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
 margin:0;
 background:var(--bg);
 color:var(--ink);
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;
 line-height:1.75;
 -webkit-font-smoothing:antialiased;
 text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.32;letter-spacing:-.01em}
p{margin:0}
button{font-family:inherit;font-size:inherit;cursor:pointer}
:focus-visible{outline:3px solid rgba(47,158,143,.45);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:60;
 background:rgba(247,245,241,.92);
 backdrop-filter:blur(12px);
 border-bottom:1px solid var(--line);
 transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-stuck{box-shadow:0 6px 22px rgba(22,32,43,.09);background:rgba(255,255,255,.96)}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.02em;color:var(--ink)}
.brand-mark{
 width:34px;height:34px;border-radius:10px;flex:0 0 auto;
 background:linear-gradient(140deg,var(--accent),var(--accent-deep));
 display:grid;place-items:center;color:#fff;font-size:15px;font-weight:800;
 box-shadow:0 4px 12px rgba(31,125,112,.28);
}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--ink-mute);letter-spacing:.14em}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
 display:inline-flex;align-items:center;min-height:40px;padding:0 13px;
 border-radius:var(--radius-sm);font-size:14.5px;color:var(--ink-soft);
 transition:color var(--ease),background var(--ease);
}
.nav-links a:hover{color:var(--accent-deep);background:var(--accent-soft)}
.nav-links a.is-active{color:var(--accent-deep);font-weight:700;background:var(--accent-soft)}
.nav-cta{display:flex;align-items:center;gap:10px}
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 min-height:42px;padding:0 20px;border-radius:var(--radius-sm);
 font-size:14.5px;font-weight:600;border:1px solid transparent;
 transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(31,125,112,.24)}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-2px);box-shadow:0 10px 22px rgba(31,125,112,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-deep);background:#fff;transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.4)}
.btn-light:hover{background:rgba(255,255,255,.24);transform:translateY(-2px)}
.nav-toggle{
 display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
 background:#fff;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{display:block;padding:13px 24px;font-size:15px;color:var(--ink-soft);border-bottom:1px solid var(--line)}
.mobile-drawer a:last-child{border-bottom:0}
.mobile-drawer a.is-active{color:var(--accent-deep);font-weight:700;background:var(--accent-soft)}
/* ---------- hero ---------- */
.hero{
 position:relative;overflow:hidden;
 background:#101a22 url("/assets/images/好体育---竞技规则百科全书与教学.webp") center/cover no-repeat;
 color:#fff;
}
.hero::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(105deg,rgba(11,20,27,.95) 0%,rgba(11,20,27,.87) 46%,rgba(11,20,27,.6) 100%);
}
.hero-inner{position:relative;z-index:2;padding:78px 0 74px;display:grid;grid-template-columns:1.06fr .94fr;gap:48px;align-items:center}
.eyebrow{
 display:inline-flex;align-items:center;gap:8px;
 padding:6px 14px;border-radius:999px;font-size:12.5px;letter-spacing:.1em;
 background:rgba(47,158,143,.18);color:#8fe0d3;border:1px solid rgba(47,158,143,.4);
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:#5ec9b9;display:block}
.hero h1{font-size:40px;line-height:1.26;margin:20px 0 18px;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:#7fdccd}
.hero-lead{font-size:15.5px;line-height:1.85;color:rgba(255,255,255,.82);max-width:600px;margin-bottom:24px}
.hero-points{display:grid;gap:10px;margin-bottom:26px;max-width:560px}
.hero-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:rgba(255,255,255,.9)}
.hero-points li::before{
 content:"";flex:0 0 auto;width:18px;height:18px;margin-top:4px;border-radius:50%;
 background:rgba(47,158,143,.24);border:1px solid rgba(94,201,185,.7);
 box-shadow:inset 0 0 0 4px rgba(47,158,143,.18);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{
 display:inline-flex;align-items:center;gap:6px;
 padding:5px 13px;border-radius:999px;font-size:12.5px;
 background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.22);color:rgba(255,255,255,.86);
}
.compare{display:grid;gap:14px}
.compare-card{
 border-radius:16px;padding:22px 20px;border:1px solid rgba(255,255,255,.18);
 backdrop-filter:blur(8px);
 box-shadow:0 20px 44px rgba(0,0,0,.24);
 transition:transform var(--ease),box-shadow var(--ease);
}
.compare-card:hover{transform:translateY(-3px);box-shadow:0 26px 52px rgba(0,0,0,.3)}
.compare-card--before{background:rgba(18,26,34,.74)}
.compare-card--after{background:rgba(47,158,143,.16);border-color:rgba(94,201,185,.5)}
.compare-card h3{font-size:15px;display:flex;align-items:center;gap:9px;margin-bottom:12px;color:#fff}
.compare-badge{font-size:11px;padding:3px 9px;border-radius:999px;letter-spacing:.1em;font-weight:700}
.compare-card--before .compare-badge{background:rgba(214,120,90,.22);color:#f2bda9;border:1px solid rgba(214,120,90,.5)}
.compare-card--after .compare-badge{background:rgba(94,201,185,.22);color:#9fe8dc;border:1px solid rgba(94,201,185,.55)}
.compare-list li{display:flex;gap:9px;font-size:13.8px;color:rgba(255,255,255,.84);padding:6px 0;line-height:1.68}
.compare-list li::before{content:"";flex:0 0 auto;width:7px;height:7px;border-radius:50%;margin-top:9px;background:rgba(255,255,255,.38)}
.compare-card--after .compare-list li::before{background:#5ec9b9}
/* ---------- sections ---------- */
.section{padding:72px 0}
.section--tight{padding:56px 0}
.section--alt{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section--dark{background:#131d26;color:#eef3f5}
.section-head{max-width:740px;margin-bottom:34px}
.section-kicker{
 display:inline-flex;align-items:center;gap:8px;
 font-size:12.5px;letter-spacing:.14em;color:var(--accent-deep);font-weight:700;
}
.section-kicker::before{content:"";width:26px;height:2px;background:var(--accent);border-radius:2px}
.section-title{font-size:30px;margin:12px 0 12px}
.section-desc{color:var(--ink-soft);font-size:15px;line-height:1.8}
.section--dark .section-kicker{color:#7fdccd}
.section--dark .section-kicker::before{background:#5ec9b9}
.section--dark .section-title{color:#fff}
.section--dark .section-desc{color:rgba(255,255,255,.7)}
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
/* ---------- cards ---------- */
.card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:24px;box-shadow:var(--shadow-xs);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--line-strong)}
.card h3{font-size:17px;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--ink-soft);line-height:1.78}
.card-icon{
 width:42px;height:42px;border-radius:11px;display:grid;place-items:center;
 background:var(--accent-soft);color:var(--accent-deep);margin-bottom:14px;
}
.card-icon svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.pain-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-xs);transition:transform var(--ease),box-shadow var(--ease)}
.pain-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.pain-num{font-size:12.5px;font-weight:800;letter-spacing:.12em;color:var(--gold);margin-bottom:10px;display:block}
.pain-card h3{font-size:17px;margin-bottom:8px}
.pain-card p{font-size:14.5px;color:var(--ink-soft)}
.media-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 overflow:hidden;box-shadow:var(--shadow-xs);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.media-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--line-strong)}
.media-card figure{margin:0;aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
.media-card img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.media-card:hover img{transform:scale(1.05)}
.media-body{padding:20px 22px 22px}
.media-body h3{font-size:17px;margin-bottom:8px}
.media-body p{font-size:14.3px;color:var(--ink-soft);line-height:1.76}
.mini-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.mini-tag{
 font-size:12px;padding:3px 10px;border-radius:999px;
 background:var(--surface-2);border:1px solid var(--line);color:var(--ink-mute);
}
/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.step{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:22px;box-shadow:var(--shadow-xs);position:relative;
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm);border-color:rgba(47,158,143,.45)}
.step-num{
 display:inline-flex;align-items:center;padding:3px 11px;border-radius:999px;
 font-size:12.5px;font-weight:800;letter-spacing:.14em;
 color:var(--accent-deep);background:var(--accent-soft);margin-bottom:12px;
}
.step h3{font-size:16px;margin-bottom:8px}
.step p{font-size:14.2px;color:var(--ink-soft);line-height:1.76}
.step-note{margin-top:22px;font-size:13.5px;color:var(--ink-mute);border-left:3px solid var(--accent-soft);padding-left:14px}
/* ---------- metrics ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:8px}
.metric{padding-left:22px;border-left:1px solid rgba(255,255,255,.14)}
.metric:first-child{padding-left:0;border-left:0}
.metric strong{display:block;font-size:34px;line-height:1.1;color:#7fdccd;letter-spacing:-.02em}
.metric span{display:block;margin-top:8px;font-size:13.5px;color:rgba(255,255,255,.72);line-height:1.6}
.metric-note{margin-top:26px;font-size:13px;color:rgba(255,255,255,.52)}
/* ---------- quotes ---------- */
.quote{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:24px;box-shadow:var(--shadow-xs);
 transition:transform var(--ease),box-shadow var(--ease);
}
.quote:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.quote p{font-size:14.5px;color:var(--ink);line-height:1.82}
.quote footer{display:flex;align-items:center;gap:10px;margin-top:16px;font-size:13px;color:var(--ink-mute)}
.avatar{
 width:34px;height:34px;border-radius:50%;flex:0 0 auto;
 background:var(--gold-soft);color:#8a6a2f;display:grid;place-items:center;
 font-weight:800;font-size:13px;
}
/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-card{
 display:flex;flex-direction:column;gap:10px;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:22px;box-shadow:var(--shadow-xs);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--line-strong)}
.news-tag{
 align-self:flex-start;font-size:12px;padding:3px 10px;border-radius:999px;
 background:var(--accent-soft);color:var(--accent-deep);font-weight:700;
}
.news-card h3{font-size:16px;line-height:1.55}
.news-card p{font-size:14px;color:var(--ink-soft);line-height:1.72}
.news-date{font-size:12.5px;color:var(--ink-mute);margin-top:auto;padding-top:6px}
.news-empty{
 padding:24px;background:var(--surface);border:1px dashed var(--line-strong);
 border-radius:var(--radius-lg);color:var(--ink-mute);font-size:14.5px;
}
/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;max-width:880px}
.faq-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);
 padding:0 22px;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item:hover{border-color:var(--line-strong);box-shadow:var(--shadow-xs)}
.faq-item summary{
 cursor:pointer;list-style:none;padding:18px 0;font-weight:700;font-size:15.5px;
 display:flex;justify-content:space-between;align-items:center;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:20px;color:var(--accent-deep);line-height:1}
.faq-item[open] summary::after{content:"–"}
.faq-item p{padding-bottom:18px;font-size:14.5px;color:var(--ink-soft);line-height:1.8}
/* ---------- cta ---------- */
.cta-band{
 background:linear-gradient(120deg,#16202b 0%,#1c3a38 100%);
 color:#fff;border-radius:18px;padding:44px;
 display:flex;align-items:center;justify-content:space-between;gap:32px;
 box-shadow:var(--shadow-md);
}
.cta-band h2{font-size:26px;margin-bottom:10px}
.cta-band p{font-size:14.8px;color:rgba(255,255,255,.76);max-width:620px;line-height:1.8}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto}
/* ---------- footer ---------- */
.site-footer{background:#131d26;color:rgba(255,255,255,.72);padding:56px 0 0;margin-top:72px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;padding-bottom:36px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;margin-bottom:14px}
.footer-brand .brand-mark{width:32px;height:32px;font-size:14px;border-radius:9px}
.site-footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62)}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:14px;letter-spacing:.02em}
.footer-col ul{display:grid;gap:9px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.66);transition:color var(--ease)}
.footer-col a:hover{color:#7fdccd}
.footer-bottom{
 display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
 padding:20px 0 26px;border-top:1px solid rgba(255,255,255,.12);
 font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.7)}
.footer-bottom a:hover{color:#7fdccd}
/* ---------- responsive ---------- */
@media (max-width:1024px){
 .hero-inner{grid-template-columns:1fr;gap:34px;padding:64px 0 60px}
 .hero h1{font-size:34px}
 .grid-4{grid-template-columns:repeat(2,1fr)}
 .steps{grid-template-columns:repeat(2,1fr)}
 .metrics{grid-template-columns:repeat(2,1fr);gap:22px}
 .metric:nth-child(3){padding-left:0;border-left:0}
 .news-grid{grid-template-columns:repeat(2,1fr)}
 .cta-band{flex-direction:column;align-items:flex-start;padding:34px}
 .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:860px){
 .nav-links{display:none}
 .nav-toggle{display:inline-flex}
 .nav-cta .btn-primary{display:none}
 .section{padding:56px 0}
 .section-title{font-size:25px}
 .grid-3{grid-template-columns:1fr}
 .quote{padding:22px}
}
@media (max-width:768px){
 .hero h1{font-size:30px}
 .hero-lead{font-size:14.8px}
 .grid-2{grid-template-columns:1fr}
 .news-grid{grid-template-columns:1fr}
 .metrics{grid-template-columns:1fr;gap:18px}
 .metric,.metric:nth-child(3){padding-left:16px;border-left:1px solid rgba(255,255,255,.14)}
 .metric:first-child{padding-left:16px}
 .footer-grid{grid-template-columns:1fr;gap:26px}
 .cta-band h2{font-size:22px}
}
@media (max-width:520px){
 .container{padding:0 18px}
 .brand{font-size:17px}
 .brand small{display:none}
 .hero-inner{padding:48px 0 46px}
 .hero h1{font-size:26px;line-height:1.32}
 .hero-actions .btn{width:100%}
 .grid-4{grid-template-columns:1fr}
 .steps{grid-template-columns:1fr}
 .section{padding:46px 0}
 .section-title{font-size:22px}
 .card,.pain-card,.media-body,.quote,.news-card{padding:20px}
 .cta-band{padding:26px 22px;border-radius:14px}
 .cta-actions .btn{width:100%}
 .btn{min-height:44px}
}

/* roulang page: category3 */
:root{
 --ink:#16202b;
 --ink-soft:#4d5c6b;
 --ink-mute:#7d8b99;
 --accent:#2f9e8f;
 --accent-deep:#1f7d70;
 --accent-soft:#e6f4f1;
 --gold:#c2954a;
 --gold-soft:#f7efe1;
 --bg:#f7f5f1;
 --surface:#ffffff;
 --surface-2:#fbfaf7;
 --line:#e6e2da;
 --line-strong:#d6d0c5;
 --radius-lg:14px;
 --radius-md:10px;
 --radius-sm:8px;
 --shadow-xs:0 1px 2px rgba(22,32,43,.05);
 --shadow-sm:0 4px 14px rgba(22,32,43,.06);
 --shadow-md:0 14px 34px rgba(22,32,43,.12);
 --ease:.2s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
 margin:0;
 background:var(--bg);
 color:var(--ink);
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;
 line-height:1.75;
 -webkit-font-smoothing:antialiased;
 text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font-family:inherit;font-size:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:3px solid rgba(47,158,143,.55);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.container--narrow{max-width:900px}

/* ============ header ============ */
.site-header{
 position:sticky;top:0;z-index:60;
 background:rgba(247,245,241,.92);
 backdrop-filter:blur(12px);
 border-bottom:1px solid var(--line);
 transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-stuck{box-shadow:0 6px 22px rgba(22,32,43,.09);background:rgba(255,255,255,.96)}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.02em;color:var(--ink)}
.brand-mark{
 width:34px;height:34px;border-radius:10px;flex:0 0 auto;
 background:linear-gradient(140deg,var(--accent),var(--accent-deep));
 display:grid;place-items:center;color:#fff;font-size:15px;font-weight:800;
 box-shadow:0 4px 12px rgba(31,125,112,.28);
}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--ink-mute);letter-spacing:.14em}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
 display:inline-flex;align-items:center;min-height:40px;padding:0 13px;
 border-radius:var(--radius-sm);font-size:14.5px;color:var(--ink-soft);
 transition:color var(--ease),background var(--ease);
}
.nav-links a:hover{color:var(--accent-deep);background:var(--accent-soft)}
.nav-links a.is-active{color:var(--accent-deep);font-weight:700;background:var(--accent-soft)}
.nav-cta{display:flex;align-items:center;gap:10px}
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 min-height:42px;padding:0 20px;border-radius:var(--radius-sm);
 font-size:14.5px;font-weight:600;border:1px solid transparent;
 transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(31,125,112,.24)}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-2px);box-shadow:0 10px 22px rgba(31,125,112,.3);color:#fff}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-deep);background:#fff;transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.4)}
.btn-light:hover{background:rgba(255,255,255,.24);transform:translateY(-2px);color:#fff}
.nav-toggle{
 display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
 background:#fff;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{display:block;padding:13px 24px;font-size:15px;color:var(--ink-soft);border-bottom:1px solid var(--line)}
.mobile-drawer a:last-child{border-bottom:0}
.mobile-drawer a.is-active{color:var(--accent-deep);font-weight:700;background:var(--accent-soft)}

/* ============ hero ============ */
.hero{
 position:relative;overflow:hidden;
 background:#101a22 url("/assets/images/好体育---竞技规则百科全书与教学.webp") center/cover no-repeat;
 color:#fff;
}
.hero::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(105deg,rgba(11,20,27,.95) 0%,rgba(11,20,27,.88) 48%,rgba(11,20,27,.6) 100%);
}
.hero-inner{position:relative;z-index:2;padding:74px 0 70px;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.eyebrow{
 display:inline-flex;align-items:center;gap:8px;
 padding:6px 14px;border-radius:999px;font-size:12.5px;letter-spacing:.1em;
 background:rgba(47,158,143,.18);color:#8fe0d3;border:1px solid rgba(47,158,143,.4);
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:#5ec9b9;display:block}
.hero h1{font-size:40px;line-height:1.26;margin:18px 0 16px;letter-spacing:-.02em;color:#fff}
.hero h1 em{font-style:normal;color:#7fdccd}
.hero-lead{font-size:15.5px;line-height:1.85;color:rgba(255,255,255,.82);max-width:600px;margin-bottom:22px}
.hero-points{display:grid;gap:10px;margin-bottom:26px;max-width:560px}
.hero-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:rgba(255,255,255,.9)}
.hero-points li::before{
 content:"";flex:0 0 auto;width:18px;height:18px;margin-top:4px;border-radius:50%;
 background:rgba(47,158,143,.24);border:1px solid rgba(94,201,185,.7);
 box-shadow:inset 0 0 0 4px rgba(47,158,143,.18);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag{
 display:inline-flex;align-items:center;gap:6px;
 padding:5px 13px;border-radius:999px;font-size:12.5px;
 background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.22);color:rgba(255,255,255,.86);
}
.panel-card{
 background:rgba(255,255,255,.07);
 border:1px solid rgba(255,255,255,.18);
 border-radius:18px;
 padding:26px 24px;
 backdrop-filter:blur(8px);
 box-shadow:0 22px 48px rgba(0,0,0,.28);
}
.panel-card h3{font-size:16px;color:#fff;margin-bottom:6px}
.panel-card .panel-sub{font-size:12.5px;color:rgba(255,255,255,.62);margin-bottom:18px;line-height:1.7}
.panel-list{display:grid;gap:12px}
.panel-list li{display:flex;gap:11px;align-items:flex-start;font-size:14px;color:rgba(255,255,255,.9);line-height:1.65}
.panel-list .num{
 flex:0 0 auto;width:24px;height:24px;border-radius:8px;display:grid;place-items:center;
 font-size:12px;font-weight:700;color:#7fdccd;background:rgba(47,158,143,.2);border:1px solid rgba(94,201,185,.45);
}
.panel-foot{
 margin-top:18px;padding-top:16px;border-top:1px dashed rgba(255,255,255,.2);
 font-size:12.5px;color:rgba(255,255,255,.6);
}

/* ============ section ============ */
.section{padding:72px 0}
.section--tight{padding:56px 0}
.section--alt{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:740px;margin-bottom:36px}
.sec-kicker{
 display:inline-flex;align-items:center;gap:9px;
 font-size:12.5px;letter-spacing:.16em;color:var(--accent-deep);font-weight:700;
}
.sec-kicker::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px}
.sec-head h2{font-size:29px;line-height:1.36;margin:12px 0 10px;letter-spacing:-.01em;color:var(--ink)}
.sec-head p{color:var(--ink-soft);font-size:15px;line-height:1.8;margin:0}
.section--alt .sec-head h2{color:var(--ink)}

/* ============ cards ============ */
.grid{display:grid;gap:22px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{
 background:var(--surface);
 border:1px solid var(--line);
 border-radius:var(--radius-lg);
 padding:24px 22px;
 box-shadow:var(--shadow-xs);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
 display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cfe6e1}
.card-icon{
 width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
 background:var(--accent-soft);color:var(--accent-deep);margin-bottom:16px;
}
.card-icon svg{width:21px;height:21px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.card h3{font-size:17.5px;line-height:1.5;margin-bottom:8px;color:var(--ink)}
.card p{font-size:14.5px;line-height:1.8;color:var(--ink-soft);margin-bottom:16px}
.card .card-tags{margin-top:auto;display:flex;flex-wrap:wrap;gap:7px}
.chip{
 display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;
 font-size:12px;color:var(--accent-deep);background:var(--accent-soft);border:1px solid #cfe6e1;
}
.chip--gold{color:#8b6a26;background:var(--gold-soft);border-color:#ecdcc0}

/* ============ 图文对照 ============ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}
.split-media{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-md);border:1px solid var(--line)}
.split-media img{width:100%;aspect-ratio:16/11;object-fit:cover}
.split-media figcaption{
 position:absolute;left:0;right:0;bottom:0;padding:16px 18px;font-size:12.5px;color:#fff;
 background:linear-gradient(to top,rgba(11,20,27,.82),rgba(11,20,27,0));
}
.scene-list{display:grid;gap:16px}
.scene-item{
 display:flex;gap:14px;background:var(--surface);border:1px solid var(--line);
 border-radius:var(--radius-md);padding:18px 18px;box-shadow:var(--shadow-xs);
 transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.scene-item:hover{transform:translateY(-3px);border-color:#cfe6e1;box-shadow:var(--shadow-sm)}
.scene-item .dot{
 flex:0 0 auto;width:8px;height:8px;border-radius:50%;background:var(--accent);margin-top:9px;
 box-shadow:0 0 0 4px var(--accent-soft);
}
.scene-item h4{font-size:15.5px;margin-bottom:5px;color:var(--ink)}
.scene-item p{font-size:14px;color:var(--ink-soft);line-height:1.75;margin:0}

/* ============ 步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:step}
.step{
 position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:22px 18px 20px;box-shadow:var(--shadow-xs);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.step::before{
 counter-increment:step;content:counter(step,decimal-leading-zero);
 display:block;font-size:13px;font-weight:800;color:var(--accent);letter-spacing:.08em;margin-bottom:10px;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cfe6e1}
.step h3{font-size:15.5px;margin-bottom:7px;color:var(--ink)}
.step p{font-size:13.5px;color:var(--ink-soft);line-height:1.75;margin:0}

/* ============ 数据 ============ */
.stat-strip{
 display:grid;grid-template-columns:repeat(4,1fr);gap:18px;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:28px;box-shadow:var(--shadow-sm);
}
.stat{ text-align:left;padding-left:18px;border-left:3px solid var(--accent-soft)}
.stat strong{display:block;font-size:30px;line-height:1.2;letter-spacing:-.02em;color:var(--ink);font-weight:800}
.stat strong span{font-size:15px;color:var(--accent-deep);font-weight:700;margin-left:2px}
.stat em{display:block;font-style:normal;font-size:13.5px;color:var(--ink-mute);margin-top:6px}

/* ============ 清单 ============ */
.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.check-box{
 background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--gold);
 border-radius:var(--radius-md);padding:20px 22px;
 transition:transform var(--ease),box-shadow var(--ease);
}
.check-box:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.check-box h3{font-size:15.5px;margin-bottom:7px;color:var(--ink)}
.check-box p{font-size:14px;color:var(--ink-soft);line-height:1.78;margin:0}

/* ============ 列表 ============ */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:22px;box-shadow:var(--shadow-xs);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
 display:flex;flex-direction:column;gap:12px;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cfe6e1}
.post-card h3{font-size:16.5px;line-height:1.55;color:var(--ink)}
.post-card h3 a:hover{color:var(--accent-deep)}
.post-card p{font-size:14px;line-height:1.78;color:var(--ink-soft);margin:0}
.post-meta{display:flex;align-items:center;gap:12px;font-size:12.5px;color:var(--ink-mute);margin-top:auto;padding-top:12px;border-top:1px dashed var(--line)}
.post-meta .cat{color:var(--accent-deep);background:var(--accent-soft);padding:2px 9px;border-radius:999px}
.post-empty{
 background:var(--surface);border:1px dashed var(--line-strong);border-radius:var(--radius-md);
 padding:34px 24px;text-align:center;color:var(--ink-mute);font-size:14.5px;
}

/* ============ FAQ ============ */
.faq{display:grid;gap:12px;max-width:920px}
.faq details{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);
 padding:0 20px;box-shadow:var(--shadow-xs);transition:border-color var(--ease),box-shadow var(--ease);
}
.faq details[open]{border-color:#cfe6e1;box-shadow:var(--shadow-sm)}
.faq summary{
 list-style:none;cursor:pointer;padding:18px 34px 18px 0;position:relative;
 font-size:15.5px;font-weight:600;color:var(--ink);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
 content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);
 font-size:20px;font-weight:400;color:var(--accent);line-height:1;
}
.faq details[open] summary::after{content:"–"}
.faq .answer{padding:0 0 20px;font-size:14.5px;line-height:1.85;color:var(--ink-soft)}

/* ============ CTA ============ */
.cta-band{
 background:#12232b;color:#fff;border-radius:18px;padding:44px 46px;
 display:grid;grid-template-columns:1.25fr .75fr;gap:34px;align-items:center;
 box-shadow:0 22px 48px rgba(18,35,43,.24);
}
.cta-band h2{font-size:26px;line-height:1.4;margin-bottom:12px;color:#fff}
.cta-band p{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.72);margin:0}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}

/* ============ footer ============ */
.site-footer{
 background:#101a22;color:rgba(255,255,255,.72);
 padding:56px 0 26px;border-top:1px solid rgba(255,255,255,.08);
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:44px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;color:#fff;margin-bottom:14px}
.site-footer p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);margin:0}
.footer-col h4{font-size:14px;letter-spacing:.08em;color:#fff;margin-bottom:14px}
.footer-col ul{display:grid;gap:9px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.66);transition:color var(--ease)}
.footer-col a:hover{color:#7fdccd}
.footer-bottom{
 display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
 margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
 font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.68)}
.footer-bottom a:hover{color:#7fdccd}

/* ============ 响应式 ============ */
@media (max-width:1024px){
 .hero h1{font-size:34px}
 .hero-inner{gap:34px;padding:62px 0 60px}
 .grid-4{grid-template-columns:repeat(2,1fr)}
 .steps{grid-template-columns:repeat(3,1fr)}
 .post-grid{grid-template-columns:repeat(2,1fr)}
 .stat-strip{grid-template-columns:repeat(2,1fr);gap:22px}
 .footer-grid{grid-template-columns:1.3fr 1fr;gap:34px}
 .cta-band{grid-template-columns:1fr;padding:36px}
 .cta-actions{justify-content:flex-start}
}
@media (max-width:900px){
 .nav-links{display:none}
 .nav-toggle{display:inline-flex}
 .hero-inner{grid-template-columns:1fr}
 .panel-card{max-width:560px}
 .split{grid-template-columns:1fr;gap:30px}
 .grid-3{grid-template-columns:repeat(2,1fr)}
 .check-grid{grid-template-columns:1fr}
}
@media (max-width:768px){
 .section{padding:52px 0}
 .section--tight{padding:44px 0}
 .hero h1{font-size:30px}
 .sec-head h2{font-size:24px}
 .sec-head{margin-bottom:28px}
 .steps{grid-template-columns:repeat(2,1fr)}
 .post-grid{grid-template-columns:1fr}
 .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
 .footer-grid{grid-template-columns:1fr;gap:28px}
 .cta-band h2{font-size:22px}
}
@media (max-width:520px){
 .container{padding:0 18px}
 .nav-bar{min-height:62px;gap:12px}
 .brand{font-size:17px}
 .brand small{display:none}
 .nav-cta .btn{padding:0 14px;min-height:40px;font-size:13.5px}
 .hero-inner{padding:48px 0 46px}
 .hero h1{font-size:26px}
 .hero-lead{font-size:14.5px}
 .hero-actions .btn{flex:1 1 auto}
 .steps{grid-template-columns:1fr}
 .stat-strip{grid-template-columns:1fr;padding:22px}
 .stat{padding-left:14px}
 .card,.post-card{padding:20px 18px}
 .cta-band{padding:28px 22px;border-radius:14px}
 .faq summary{font-size:14.5px}
 .footer-bottom{flex-direction:column;align-items:flex-start}
}