/* =========================================================
   五十远行 50trip.com — 全站设计系统
   面向 50+ 旅行者：大字号、高对比、宽行距、大点击区
   配色：海蓝 #1b3f5e / 珊瑚 #d88163 / 雾白 #edf4f8
   ========================================================= */

:root{
  --ink:#1b2b36;
  --ink-soft:#41535f;
  --muted:#5d707c;
  --sea:#1b3f5e;
  --sea-2:#2a5a7f;
  --sea-3:#102b42;
  --coral:#d88163;
  --coral-deep:#a95136;
  --coral-soft:#eab39b;
  --mist:#edf4f8;
  --mist-2:#dfebf1;
  --paper:#fbfdfc;
  --line:#d6e2e8;
  --line-soft:#e5eff4;
  --white:#ffffff;
  --danger:#a54535;

  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong","SimSun",Georgia,serif;
  --sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;

  --wrap:1180px;
  --radius:3px;
  --shadow:0 10px 30px rgba(27,63,94,.08);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:18px;
  line-height:1.85;
  letter-spacing:.01em;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
::selection{background:var(--mist-2);color:var(--sea)}

h1,h2,h3,h4{
  font-family:var(--serif);
  font-weight:600;
  letter-spacing:.015em;
  line-height:1.35;
  margin:0;
  color:var(--sea);
}
p{margin:0 0 1.1em}
ul,ol{margin:0 0 1.2em;padding-left:1.25em}
li{margin:.35em 0}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 28px}
.narrow{max-width:860px;margin:0 auto;padding:0 28px}

.skip{position:absolute;left:-9999px;top:0;z-index:99;background:var(--sea);color:#fff;padding:12px 20px}
.skip:focus{left:16px;top:16px}
:focus-visible{outline:3px solid var(--coral-deep);outline-offset:3px}

/* ---------- 品牌与页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(251,253,252,.94);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line-soft);
}
.header-inner{display:flex;align-items:center;gap:28px;min-height:76px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{width:38px;height:38px;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{font-family:var(--serif);font-size:20px;letter-spacing:.16em;color:var(--sea)}
.brand-text em{font-style:normal;font-size:9.5px;letter-spacing:.22em;color:var(--coral-deep);margin-top:3px}
.site-nav{display:flex;align-items:center;gap:4px;margin-left:auto;flex-wrap:wrap}
.site-nav a{
  display:inline-block;padding:10px 13px;font-size:16.5px;color:var(--ink-soft);
  border-bottom:2px solid transparent;transition:color .2s,border-color .2s;
}
.site-nav a:hover{color:var(--sea)}
.site-nav a[aria-current="page"]{color:var(--sea);border-bottom-color:var(--coral)}
.header-cta{
  flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 18px;background:var(--sea);color:#fff;
  font-size:15.5px;letter-spacing:.04em;border-radius:var(--radius);
  transition:background .2s,transform .2s;
}
.header-cta:hover{background:var(--sea-2)}
.nav-toggle{
  display:none;margin-left:auto;min-height:44px;padding:0 16px;
  background:transparent;border:1px solid var(--line);border-radius:var(--radius);
  font-size:16px;cursor:pointer;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:52px;padding:0 28px;border-radius:var(--radius);
  font-size:17px;letter-spacing:.04em;line-height:1.2;
  background:var(--sea);color:#fff;border:1px solid var(--sea);
  transition:background .2s,color .2s,transform .2s;cursor:pointer;
}
.btn:hover{background:var(--sea-2);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--sea);border-color:var(--sea)}
.btn-ghost:hover{background:var(--sea);color:#fff}
.btn-gold{background:var(--coral);border-color:var(--coral);color:#1b2b36}
.btn-gold:hover{background:var(--coral-soft);color:#1b2b36}
.btn-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-light:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-sm{min-height:44px;padding:0 18px;font-size:15.5px}

/* ---------- 首页主视觉 ---------- */
.hero{position:relative;min-height:min(680px,86vh);display:flex;align-items:flex-end;overflow:hidden;background:var(--sea)}
.hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-shade{
  position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(12,35,54,.70) 0%,rgba(12,35,54,.44) 40%,rgba(12,35,54,.12) 62%,rgba(12,35,54,0) 80%),
    linear-gradient(180deg,rgba(15,41,62,.18) 0%,rgba(15,41,62,.34) 55%,rgba(13,36,56,.78) 100%);
}
.hero-content{position:relative;z-index:2;width:100%;padding-top:120px;padding-bottom:64px;color:#fff;max-width:var(--wrap)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--sans);font-size:12.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--coral-soft);margin:0 0 18px;font-weight:600;
}
.eyebrow::before{content:"";width:30px;height:1px;background:var(--coral-soft);display:inline-block}
.hero h1{
  color:#fff;font-size:clamp(36px,4.4vw,54px);line-height:1.32;
  margin:0 0 20px;letter-spacing:.02em;text-wrap:balance;max-width:900px;
  text-shadow:0 2px 24px rgba(11,32,49,.45);
}
.hero-lead{font-size:19px;line-height:1.85;color:rgba(255,255,255,.92);max-width:660px;margin:0 0 30px;text-shadow:0 1px 16px rgba(11,32,49,.4)}
.hero .eyebrow,.page-hero .eyebrow{text-shadow:0 1px 12px rgba(11,32,49,.5)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-facts{display:flex;flex-wrap:wrap;gap:0;margin:0;padding:0;list-style:none;border-top:1px solid rgba(255,255,255,.24)}
.hero-facts li{padding:14px 30px 0 0;margin:0}
.hero-facts li:not(:first-child){padding-left:30px;border-left:1px solid rgba(255,255,255,.18)}
.hero-facts span{display:block;font-size:12px;letter-spacing:.16em;color:rgba(255,255,255,.68);margin-bottom:2px}
.hero-facts strong{display:block;font-size:16px;font-weight:500;color:#fff;letter-spacing:.02em}

/* ---------- 通用区块 ---------- */
.section{padding:88px 0}
.section-sand{background:var(--mist)}
.section-pine{background:var(--sea);color:#fff}
.section-head{max-width:760px;margin-bottom:44px}
.section-head .eyebrow{color:var(--coral-deep);margin-bottom:14px}
.section-head .eyebrow::before{background:var(--coral-deep)}
.section-head h2{font-size:clamp(28px,3.2vw,40px);margin-bottom:16px}
.section-head p{font-size:17.5px;color:var(--muted);margin:0}
.section-pine .section-head .eyebrow{color:var(--coral-soft)}
.section-pine .section-head .eyebrow::before{background:var(--coral-soft)}
.section-pine .section-head h2{color:#fff}
.section-pine .section-head p{color:rgba(255,255,255,.78)}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:44px}
.section-head-row .section-head{margin-bottom:0}
.link-more{
  display:inline-flex;align-items:center;gap:8px;font-size:16px;color:var(--sea);
  border-bottom:1px solid var(--coral);padding-bottom:3px;white-space:nowrap;
}
.link-more::after{content:"→";color:var(--coral-deep)}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;gap:26px}
.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{
  display:flex;flex-direction:column;background:var(--paper);
  border:1px solid var(--line-soft);border-radius:var(--radius);overflow:hidden;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line)}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--mist-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-tag{
  position:absolute;left:14px;top:14px;background:rgba(251,253,252,.92);
  color:var(--sea);font-size:12.5px;letter-spacing:.1em;padding:5px 10px;border-radius:2px;
}
.card-body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:22px;margin:0 0 10px;line-height:1.4}
.card-body p{font-size:16px;line-height:1.75;color:var(--muted);margin:0 0 18px}
.card-meta{
  display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:auto;padding-top:14px;
  border-top:1px solid var(--line-soft);font-size:13.5px;color:var(--ink-soft);
}
.card-meta span{display:inline-flex;align-items:center;gap:6px}
.card-meta b{font-weight:500;color:var(--coral-deep)}

.mini-card{
  position:relative;display:flex;gap:16px;align-items:flex-start;padding:22px 38px 24px 20px;
  background:var(--paper);border:1px solid var(--line-soft);border-radius:var(--radius);
  transition:border-color .2s,transform .2s;
}
.mini-card::after{
  content:"→";position:absolute;right:18px;bottom:18px;font-size:14px;
  color:var(--coral-deep);opacity:.65;transition:transform .2s,opacity .2s;
}
.mini-card:hover::after{transform:translateX(3px);opacity:1}
.mini-card:hover{border-color:var(--coral);transform:translateY(-2px)}
.mini-num{
  font-family:var(--serif);font-size:13px;color:var(--coral-deep);letter-spacing:.08em;
  flex:0 0 auto;padding-top:2px;min-width:30px;
}
.mini-card h3{font-size:18.5px;margin:0 0 6px}
.mini-card p{font-size:14.5px;color:var(--muted);margin:0;line-height:1.7}

/* ---------- 价值主张 ---------- */
.value-list{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
.value-item{padding:30px 26px 0 0;margin:0}
.value-item:not(:first-child){padding-left:26px;border-left:1px solid var(--line)}
.value-item span{display:block;font-family:var(--serif);font-size:13px;letter-spacing:.16em;color:var(--coral-deep);margin-bottom:10px}
.value-item h3{font-size:20px;margin:0 0 8px}
.value-item p{font-size:15px;line-height:1.75;color:var(--muted);margin:0}

/* ---------- 页面主视觉（内页） ---------- */
.page-hero{position:relative;min-height:470px;display:flex;align-items:flex-end;overflow:hidden;background:var(--sea)}
.page-hero .hero-img{opacity:.92}
.page-hero .hero-shade{background:
  linear-gradient(90deg,rgba(12,35,54,.6) 0%,rgba(12,35,54,.26) 48%,rgba(12,35,54,0) 74%),
  linear-gradient(180deg,rgba(15,41,62,.12) 0%,rgba(15,41,62,.38) 50%,rgba(13,36,56,.82) 100%)}
.page-hero .hero-content{padding-top:110px;padding-bottom:52px}
.page-hero h1{color:#fff;font-size:clamp(30px,3.4vw,42px);max-width:960px}
.page-hero .hero-lead{font-size:18px;margin-bottom:26px;max-width:700px}
.page-hero .hero-facts li{padding-top:12px}
.page-hero--plain{
  background:
    radial-gradient(1200px 400px at 80% -10%,rgba(216,129,99,.18),transparent),
    var(--sea);
  min-height:380px;
}
.page-hero--plain::after{
  content:"";position:absolute;inset:0;opacity:.22;pointer-events:none;
  background-image:
    repeating-linear-gradient(135deg,rgba(255,255,255,.06) 0 1px,transparent 1px 14px);
}

/* ---------- 面包屑 ---------- */
.crumbs{padding:18px 0 0;font-size:13.5px;color:var(--muted)}
.crumbs ol{display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none}
.crumbs li::after{content:"/";margin-left:6px;color:var(--line)}
.crumbs li:last-child::after{content:""}
.crumbs a{color:var(--ink-soft)}
.crumbs a:hover{color:var(--sea)}

/* ---------- 正文排版 ---------- */
.prose{max-width:820px;margin:0 auto}
.prose h2{
  font-size:clamp(25px,2.6vw,31px);margin:56px 0 18px;padding-top:8px;
  border-top:1px solid var(--line);padding-top:34px;
}
.prose h2:first-child{border-top:0;margin-top:0;padding-top:0}
.prose h3{font-size:21px;margin:34px 0 12px;color:var(--sea)}
.prose p{font-size:18px;line-height:1.95;margin:0 0 1.2em}
.prose ul,.prose ol{font-size:17.5px;line-height:1.9}
.prose li{margin:.5em 0}
.prose a{color:var(--sea);border-bottom:1px solid var(--coral);padding-bottom:1px}
.prose a:hover{color:var(--coral-deep)}
/* 正文内的按钮链接：覆盖 .prose a 的深色字与珊瑚下划线，避免深色字落在深色按钮上 */
.prose a.btn{border-bottom:0;padding-bottom:0;color:#fff}
.prose a.btn-gold{color:#1b2b36}
.prose a.btn-light{color:#fff}
.prose a.btn-ghost{color:var(--sea)}
.prose a.btn:hover{color:#fff}
.prose a.btn-gold:hover{color:#1b2b36}
.prose a.btn-ghost:hover{color:#fff}
.prose strong{font-weight:600;color:var(--sea)}
.prose blockquote{
  margin:30px 0;padding:22px 26px;background:var(--mist);border-left:3px solid var(--coral);
  font-family:var(--serif);font-size:19px;line-height:1.8;color:var(--ink-soft);
}
.prose blockquote p{margin:0;font-size:19px}
.prose figure{margin:30px 0}
.prose figure img{border-radius:var(--radius)}
.prose figcaption{font-size:13.5px;color:var(--muted);margin-top:8px;text-align:center}

.callout{
  margin:30px 0;padding:22px 24px;border:1px solid var(--line);border-left:3px solid var(--coral);
  background:#fbfdfc;border-radius:0 var(--radius) var(--radius) 0;
}
.callout h4{font-size:16px;margin:0 0 6px;color:var(--coral-deep);font-family:var(--sans);letter-spacing:.06em}
.callout p,.callout li{font-size:16px;line-height:1.8;margin:0;color:var(--ink-soft)}
.callout ul{margin:4px 0 0}
.callout--sea{background:var(--sea);border-color:var(--coral-soft);color:#fff}
.callout--sea h4{color:var(--coral-soft)}
.callout--sea p,.callout--sea li{color:rgba(255,255,255,.85)}

.fact-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border:1px solid var(--line);border-radius:var(--radius);background:var(--paper);
  margin:0 0 8px;
}
.fact-strip div{padding:18px 20px;border-right:1px solid var(--line-soft)}
.fact-strip div:last-child{border-right:0}
.fact-strip span{display:block;font-size:12px;letter-spacing:.14em;color:var(--muted);margin-bottom:4px}
.fact-strip strong{font-size:17px;font-weight:500;color:var(--sea);font-family:var(--serif)}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;margin:28px 0;border:1px solid var(--line);border-radius:var(--radius)}
table{width:100%;border-collapse:collapse;font-size:15.5px;min-width:520px;background:var(--paper)}
th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line-soft);vertical-align:top}
th{background:var(--mist);font-weight:600;color:var(--sea);font-size:14px;letter-spacing:.04em}
tr:last-child td{border-bottom:0}
td.num{white-space:nowrap;font-variant-numeric:tabular-nums}

/* ---------- 时间线 ---------- */
.timeline{position:relative;margin:36px 0;padding-left:34px}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:1px;background:var(--line)}
.day{position:relative;margin:0 0 30px}
.day::before{
  content:"";position:absolute;left:-30px;top:6px;width:9px;height:9px;border-radius:50%;
  background:var(--coral);box-shadow:0 0 0 4px var(--paper);
}
.day h3{font-size:19px;margin:0 0 4px;display:flex;flex-wrap:wrap;align-items:baseline;gap:10px}
.day h3 em{font-style:normal;font-family:var(--sans);font-size:12px;letter-spacing:.12em;color:var(--coral-deep)}
.day p{font-size:16px;color:var(--ink-soft);line-height:1.8;margin:0}

/* ---------- FAQ ---------- */
.faq{margin:30px 0}
.faq details{
  border-bottom:1px solid var(--line-soft);padding:0;
}
.faq summary{
  display:flex;justify-content:space-between;align-items:flex-start;gap:20px;
  cursor:pointer;list-style:none;padding:20px 0;font-size:18px;font-weight:600;color:var(--sea);
  font-family:var(--serif);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--sans);font-size:22px;color:var(--coral);line-height:1;padding-top:2px}
.faq details[open] summary::after{content:"−"}
.faq details p{font-size:16px;color:var(--ink-soft);line-height:1.85;margin:0 0 20px;padding-right:44px}

/* ---------- 携程联盟模块 ---------- */
.aff{
  margin:48px 0;border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg,#fbfdfc,#edf4f8);
  padding:30px 30px 26px;
}
.aff-top{display:flex;flex-wrap:wrap;align-items:baseline;gap:12px;margin-bottom:6px}
.aff h3{font-size:22px;margin:0}
.aff .aff-badge{
  font-size:11.5px;letter-spacing:.14em;color:var(--coral-deep);
  border:1px solid var(--coral-soft);padding:2px 8px;border-radius:2px;
}
.aff p{font-size:15px;color:var(--muted);line-height:1.75;margin:0 0 18px}
.aff-actions{display:flex;flex-wrap:wrap;gap:10px}
.aff-actions .btn{min-height:46px;padding:0 20px;font-size:15.5px}
.aff-note{font-size:12.5px;color:var(--muted);line-height:1.7;margin:14px 0 0}

/* ---------- CTA 横幅 ---------- */
.cta-band{background:var(--sea-3);color:#fff;padding:64px 0;position:relative;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;right:-80px;top:-80px;width:340px;height:340px;border-radius:50%;
  border:1px solid rgba(216,129,99,.28);
}
.cta-band .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:30px;position:relative}
.cta-band h2{color:#fff;font-size:clamp(26px,3vw,34px);margin:0 0 8px}
.cta-band p{color:rgba(255,255,255,.76);margin:0;font-size:16px}
.cta-band .actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{background:#0c2236;color:rgba(255,255,255,.78);padding:64px 0 28px;font-size:15px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-brand .brand-text strong{color:#fff;font-size:19px}
.footer-brand .brand-text em{color:var(--coral-soft)}
.footer-brand p{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.62);margin:16px 0 0;max-width:320px}
.footer-col h3{font-family:var(--sans);font-size:12.5px;letter-spacing:.16em;color:var(--coral-soft);margin:0 0 16px;font-weight:600}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{margin:0 0 10px}
.footer-col a{color:rgba(255,255,255,.76);font-size:14.5px}
.footer-col a:hover{color:#fff;border-bottom:1px solid var(--coral-soft)}
.footer-bottom{padding-top:24px;display:flex;flex-wrap:wrap;gap:14px 30px;justify-content:space-between;font-size:12.5px;color:rgba(255,255,255,.5)}
.footer-bottom p{margin:0;max-width:760px;line-height:1.7}

/* ---------- 清单页 ---------- */
.checklist-app{max-width:900px;margin:0 auto}
.progress-card{
  position:sticky;top:92px;z-index:10;background:var(--paper);border:1px solid var(--line);
  border-radius:var(--radius);padding:18px 22px;margin-bottom:28px;box-shadow:var(--shadow);
}
.progress-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:10px}
.progress-head strong{font-size:16px;color:var(--sea)}
.progress-head span{font-size:14px;color:var(--muted)}
.progress-bar{height:8px;background:var(--mist-2);border-radius:4px;overflow:hidden}
.progress-bar i{display:block;height:100%;width:0;background:var(--coral);transition:width .3s}
.progress-actions{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.check-group{background:var(--paper);border:1px solid var(--line-soft);border-radius:var(--radius);margin-bottom:22px;overflow:hidden}
.check-group h2{
  font-family:var(--sans);font-size:16px;letter-spacing:.06em;background:var(--mist);
  margin:0;padding:14px 20px;border-bottom:1px solid var(--line-soft);color:var(--sea);
}
.check-item{display:flex;gap:14px;align-items:flex-start;padding:14px 20px;border-bottom:1px solid var(--line-soft)}
.check-item:last-child{border-bottom:0}
.check-item input{
  width:22px;height:22px;margin:5px 0 0;accent-color:var(--coral-deep);flex:0 0 auto;cursor:pointer;
}
.check-item label{font-size:16px;line-height:1.7;cursor:pointer}
.check-item label small{display:block;font-size:13px;color:var(--muted);line-height:1.6;margin-top:2px}
.check-item input:checked + label{color:var(--muted);text-decoration:line-through;text-decoration-color:var(--line)}

/* ---------- 关于/联系 ---------- */
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:start}
.pullquote{
  font-family:var(--serif);font-size:26px;line-height:1.7;color:var(--sea);
  border-left:3px solid var(--coral);padding-left:26px;margin:0;
}
.contact-box{border:1px solid var(--line);background:var(--mist);padding:30px;border-radius:var(--radius)}
.contact-box h3{font-size:20px;margin:0 0 10px}
.contact-box p{font-size:15.5px;color:var(--ink-soft);line-height:1.8}
.contact-box a{color:var(--sea);border-bottom:1px solid var(--coral)}
.copy-list{display:grid;gap:14px;margin:26px 0 0}
.copy-item{display:flex;gap:12px;align-items:flex-start;padding:16px 18px;background:var(--paper);border:1px solid var(--line-soft);border-radius:var(--radius)}
.copy-item code{font-family:Consolas,monospace;font-size:13px;color:var(--muted);white-space:pre-wrap;word-break:break-all}

/* ---------- 404 ---------- */
.notfound{min-height:58vh;display:flex;align-items:center;padding:80px 0}
.notfound h1{font-size:clamp(34px,4vw,52px);margin:0 0 14px}
.notfound p{font-size:18px;color:var(--muted);max-width:560px}
.notfound .actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .header-cta{display:none}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .value-list{grid-template-columns:repeat(2,1fr)}
  .value-item:nth-child(3){padding-left:0;border-left:0}
  .value-item:nth-child(3),.value-item:nth-child(4){border-top:1px solid var(--line);margin-top:26px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .split{grid-template-columns:1fr;gap:40px}
}
@media (max-width:860px){
  body{font-size:17.5px}
  .header-inner{min-height:66px;gap:14px}
  .brand-mark{width:32px;height:32px}
  .brand-text strong{font-size:18px}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .site-nav{
    display:none;position:absolute;left:0;right:0;top:66px;background:var(--paper);
    border-bottom:1px solid var(--line);padding:10px 20px 16px;flex-direction:column;align-items:stretch;
    gap:0;box-shadow:var(--shadow);margin-left:0;
  }
  .site-nav.is-open{display:flex}
  .site-nav a{padding:13px 4px;border-bottom:1px solid var(--line-soft);font-size:17px}
  .site-nav a[aria-current="page"]{border-bottom-color:var(--line-soft);color:var(--coral-deep)}
  .hero{min-height:78vh}
  .hero-facts li{padding-right:20px}
  .hero-facts li:not(:first-child){padding-left:20px}
  .section{padding:62px 0}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .grid-4{grid-template-columns:1fr}
  .value-list{grid-template-columns:1fr}
  .value-item{padding:24px 0 0;border-left:0!important;border-top:1px solid var(--line);margin-top:0}
  .value-item:first-child{border-top:0;padding-top:0}
  .fact-strip{grid-template-columns:1fr 1fr}
  .fact-strip div:nth-child(3){border-top:1px solid var(--line-soft)}
  .fact-strip div:nth-child(2){border-right:0}
  .page-hero{min-height:420px}
  .page-hero .hero-content{padding-top:96px}
  .prose h2{font-size:26px}
  .aff{padding:24px 20px 22px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .cta-band .wrap{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .wrap,.narrow{padding:0 20px}
  .hero h1{font-size:34px}
  .hero-lead{font-size:17px}
  .hero-actions .btn{width:100%}
  .hero-facts{display:grid;grid-template-columns:1fr 1fr;gap:0}
  .hero-facts li{padding:12px 10px 0 0!important;border-left:0!important}
  .hero-facts li:nth-child(even){padding-left:14px!important;border-left:1px solid rgba(255,255,255,.18)!important}
  .section-head-row{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .fact-strip{grid-template-columns:1fr}
  .fact-strip div{border-right:0;border-bottom:1px solid var(--line-soft)}
  .fact-strip div:last-child{border-bottom:0}
  .cta-band .actions .btn{width:100%}
  .aff-actions .btn{width:100%}
}

/* ---------- 打印 ---------- */
@media print{
  .site-header,.site-footer,.cta-band,.aff,.hero-actions,.progress-actions,.nav-toggle{display:none!important}
  body{background:#fff;font-size:12pt}
  .section{padding:12pt 0}
  .check-group{break-inside:avoid}
  a{color:#000;text-decoration:none}
}