/* roulang page: index */
/* ===== 设计令牌 ===== */
:root{
  --ink:#0B3B3C;
  --ink-deep:#072A2B;
  --ink-soft:#E6EFEE;
  --accent:#FF6A2B;
  --accent-hover:#E85A1E;
  --accent-soft:#FFF1E8;
  --heading:#14161A;
  --text:#3A4247;
  --muted:#6B7478;
  --border:#E3DFD6;
  --bg:#F6F4EF;
  --card:#FFFFFF;
  --alt:#EFECE5;
  --success:#2E7D5B;
  --warn:#B45309;
  --r-card:16px;
  --r-img:14px;
  --r-btn:999px;
  --r-badge:6px;
  --sh-1:0 1px 2px rgba(20,22,26,.04);
  --sh-2:0 14px 36px -22px rgba(11,59,60,.22);
  --font-cn:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Inter","Oswald","Helvetica Neue",Arial,sans-serif;
  --pad-x:32px;
  --sec-y:108px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--ink);
  outline-offset:2px;
  border-radius:4px;
}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;color:var(--heading);letter-spacing:-.015em;line-height:1.25}
h1{font-size:clamp(32px,5vw,56px);font-weight:800}
h2{font-size:clamp(26px,3.2vw,38px);font-weight:700}
h3{font-size:20px;font-weight:600}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
input,select,textarea{font-family:inherit;font-size:16px}
::selection{background:var(--accent-soft);color:var(--accent-hover)}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;z-index:999}
.skip-link:focus{left:0}

/* ===== 容器与板块 ===== */
.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding-left:var(--pad-x);
  padding-right:var(--pad-x);
}
.section{padding:calc(var(--sec-y) * .5) 0}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:38px;
}
.section-head h2{
  position:relative;
  padding-left:16px;
}
.section-head h2::before{
  content:"";
  position:absolute;
  left:0;top:.18em;bottom:.18em;
  width:4px;border-radius:2px;background:var(--ink);
}
.section-sub{font-size:15px;color:var(--muted);margin-top:8px}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--ink);font-weight:600;font-size:15px;
  position:relative;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:-3px;height:2px;width:0;
  background:var(--accent);transition:width .28s var(--ease);
}
.text-link:hover::after{width:100%}
.text-link svg{transition:transform .28s var(--ease)}
.text-link:hover svg{transform:translateX(2px)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:50px;padding:0 28px;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;border:1.5px solid transparent;
  transition:transform .25s var(--ease),background-color .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);background:#D14E15}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink-soft);transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--ink-soft);transform:translateY(-1px)}
.btn-sm{height:42px;padding:0 20px;font-size:15px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn-block{width:100%}

/* ===== 徽章 / 标签 ===== */
.badge{
  display:inline-flex;align-items:center;
  padding:4px 10px;border-radius:var(--r-badge);
  font-size:13px;font-weight:600;line-height:1.5;
  background:var(--ink-soft);color:var(--ink);
}
.badge-accent{background:var(--accent-soft);color:var(--accent-hover)}
.tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-badge);
  background:var(--accent-soft);color:var(--accent-hover);
  font-size:13px;font-weight:600;letter-spacing:.02em;
}
.num-font{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ===== 顶部信息条 ===== */
.topbar{
  background:var(--ink-deep);color:rgba(255,255,255,.82);
  font-size:13px;
}
.topbar-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:38px;padding-top:6px;padding-bottom:6px;
}
.topbar a{color:#fff;font-weight:600;transition:color .2s var(--ease)}
.topbar a:hover{color:var(--accent)}
.topbar-right{display:flex;align-items:center;gap:18px}
.topbar-right span{display:inline-flex;align-items:center;gap:6px}

/* ===== 导航 ===== */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(246,244,239,.94);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid transparent;
  transition:box-shadow .3s var(--ease),border-color .3s var(--ease),background-color .3s var(--ease);
}
.site-header.is-stuck{
  border-bottom-color:var(--border);
  box-shadow:0 10px 30px -26px rgba(11,59,60,.5);
  background:rgba(246,244,239,.98);
}
.header-main{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:26px;
  padding-top:14px;
  padding-bottom:14px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:40px;height:40px;flex:0 0 auto}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-text b{font-size:19px;font-weight:800;color:var(--heading);letter-spacing:-.02em}
.logo-text small{font-size:11px;color:var(--muted);letter-spacing:.14em;text-transform:uppercase}

.search{
  position:relative;
  width:100%;max-width:540px;margin:0 auto;
  display:flex;align-items:center;
  background:#fff;
  border:1.5px solid var(--border);
  border-radius:var(--r-btn);
  height:48px;
  padding:0 6px 0 44px;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.search:focus-within{border-color:var(--ink);box-shadow:0 0 0 4px rgba(11,59,60,.08)}
.search svg.search-icon{
  position:absolute;left:16px;top:50%;transform:translateY(-50%);
  color:var(--muted);
}
.search input{
  flex:1;border:0;background:transparent;height:100%;
  color:var(--heading);font-size:15px;outline:none;
}
.search input::placeholder{color:#9AA2A5}
.search button{
  width:38px;height:38px;border-radius:50%;border:0;
  background:var(--ink);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  transition:background-color .25s var(--ease),transform .25s var(--ease);
}
.search button:hover{background:var(--ink-deep);transform:translateY(-1px)}

.main-nav{display:flex;align-items:center;gap:22px}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;color:var(--text);
  padding:6px 0;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--accent);transition:width .28s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{width:100%}
.nav-link[aria-current="page"]{color:var(--ink);font-weight:700}
.nav-link[aria-current="page"]::after{width:100%}

.menu-btn{
  display:none;
  width:44px;height:44px;border-radius:12px;
  border:1.5px solid var(--border);background:#fff;color:var(--ink);
  align-items:center;justify-content:center;
}
.menu-btn:hover{border-color:var(--ink)}

/* ===== 抽屉 ===== */
.drawer{
  position:fixed;inset:0;z-index:120;
  background:rgba(7,42,43,.45);
  opacity:0;visibility:hidden;
  transition:opacity .3s var(--ease),visibility .3s var(--ease);
}
.drawer.is-open{opacity:1;visibility:visible}
.drawer-panel{
  position:absolute;right:0;top:0;bottom:0;
  width:min(86vw,360px);
  background:var(--bg);
  padding:22px;
  transform:translateX(100%);
  transition:transform .32s var(--ease);
  overflow-y:auto;
  display:flex;flex-direction:column;gap:20px;
}
.drawer.is-open .drawer-panel{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{
  width:40px;height:40px;border-radius:12px;border:1.5px solid var(--border);
  background:#fff;color:var(--ink);display:inline-flex;align-items:center;justify-content:center;
}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{
  padding:13px 14px;border-radius:12px;font-weight:600;color:var(--heading);
  border:1px solid transparent;
  transition:background-color .2s var(--ease),border-color .2s var(--ease);
}
.drawer-nav a:hover{background:#fff;border-color:var(--border)}
.drawer-nav a[aria-current="page"]{background:#fff;border-color:var(--ink);color:var(--ink)}
.drawer-contact{font-size:14px;color:var(--muted);display:flex;flex-direction:column;gap:6px}

/* ===== Hero ===== */
.hero{padding:56px 0 0;position:relative}
.hero-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.hero-copy .tag{margin-bottom:20px}
.hero-copy h1{margin-bottom:18px}
.hero-sub{font-size:18px;color:var(--muted);max-width:30em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 36px}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;padding-top:26px;border-top:1px solid var(--border);
}
.hero-stats li{display:flex;flex-direction:column;gap:2px}
.hero-stats .num{font-family:var(--font-num);font-size:28px;font-weight:700;color:var(--ink);letter-spacing:.01em}
.hero-stats .lbl{font-size:13px;color:var(--muted)}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:16/11;object-fit:cover;
  border-radius:20px;background:var(--alt);
}
.hero-badge{
  position:absolute;left:-18px;bottom:26px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:14px 18px;box-shadow:var(--sh-2);
  display:flex;flex-direction:column;gap:2px;max-width:220px;
}
.hero-badge strong{color:var(--ink);font-size:15px}
.hero-badge span{font-size:13px;color:var(--muted)}

/* ===== Chip 横滑 ===== */
.chip-row{
  display:grid;
  grid-auto-flow:column;
  grid-auto-columns:minmax(156px,1fr);
  gap:14px;
  overflow-x:auto;
  scroll-snap-type:x proximity;
  padding:2px 2px 16px;
  scrollbar-width:none;
}
.chip-row::-webkit-scrollbar{display:none}
.chip{
  scroll-snap-align:start;
  display:flex;flex-direction:column;gap:10px;
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:18px;box-shadow:var(--sh-1);
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.chip:hover{transform:translateY(-3px);border-color:var(--ink);box-shadow:var(--sh-2)}
.chip-icon{
  width:38px;height:38px;border-radius:12px;background:var(--ink-soft);color:var(--ink);
  display:inline-flex;align-items:center;justify-content:center;
}
.chip span{font-size:15px;font-weight:600;color:var(--heading)}

/* ===== 爆款网格 ===== */
.deal-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.deal-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
  display:flex;
}
.deal-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--sh-2)}
.deal-link{display:flex;flex-direction:column;width:100%;height:100%}
.deal-cover{overflow:hidden;background:var(--alt)}
.deal-cover img{width:100%;height:100%;object-fit:cover;aspect-ratio:3/2;transition:transform .45s var(--ease)}
.deal-card:hover .deal-cover img{transform:scale(1.04)}
.deal-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.deal-body h3{
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.deal-desc{
  font-size:14.5px;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.deal-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.price{font-family:var(--font-num);font-size:19px;font-weight:700;color:var(--accent-hover);letter-spacing:.01em}
.deal-card--lead{grid-column:span 2}
.deal-card--lead .deal-cover img{aspect-ratio:16/8}
.deal-card--lead .deal-body{padding:24px 26px 26px}
.deal-card--lead h3{font-size:24px}
.deal-card--lead .deal-desc{font-size:15.5px}

/* ===== 评价横滑 ===== */
.review-wrap{position:relative}
.review-track{
  display:grid;
  grid-auto-flow:column;
  grid-auto-columns:calc((100% - 48px) / 3);
  gap:24px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:4px 2px 20px;
  scrollbar-width:none;
}
.review-track::-webkit-scrollbar{display:none}
.review-card{
  scroll-snap-align:start;
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
  display:flex;flex-direction:column;gap:14px;
}
.review-top{display:flex;align-items:center;gap:12px}
.avatar{
  width:44px;height:44px;border-radius:50%;background:var(--ink);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:18px;font-weight:700;flex:0 0 auto;
}
.review-name{font-weight:600;color:var(--heading);font-size:15px}
.stars{display:flex;gap:2px;color:var(--accent)}
.review-text{font-size:15px;color:var(--text)}
.review-src{font-size:13px;color:var(--muted);margin-top:auto}
.review-controls{display:flex;align-items:center;gap:16px;margin-top:6px}
.review-arrows{display:flex;gap:10px}
.arrow-btn{
  width:44px;height:44px;border-radius:50%;border:1.5px solid var(--border);
  background:#fff;color:var(--ink);display:inline-flex;align-items:center;justify-content:center;
  transition:border-color .25s var(--ease),background-color .25s var(--ease),transform .25s var(--ease);
}
.arrow-btn:hover{border-color:var(--ink);background:var(--ink-soft);transform:translateY(-1px)}
.review-progress{
  flex:1;height:3px;border-radius:999px;background:var(--border);overflow:hidden;
}
.review-progress span{
  display:block;height:100%;width:22%;background:var(--accent);
  transition:width .25s var(--ease);
}

/* ===== 保障条（深色） ===== */
.guarantee{
  background:var(--ink);color:#fff;
  padding:64px 0;margin-top:calc(var(--sec-y) * .5);
}
.guarantee-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:32px}
.guarantee-item{display:flex;flex-direction:column;gap:10px}
.guarantee-icon{
  width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,.1);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
}
.guarantee-item h3{color:#fff;font-size:19px}
.guarantee-item p{font-size:14px;color:rgba(255,255,255,.72)}

/* ===== 预约 CTA ===== */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink-soft);
  border-radius:24px;
  padding:56px 56px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;bottom:-120px;width:420px;height:420px;
  border-radius:50%;border:2px solid rgba(11,59,60,.16);
  box-shadow:0 0 0 40px rgba(11,59,60,.06),0 0 0 84px rgba(11,59,60,.04);
  pointer-events:none;
}
.cta-band h2{margin-bottom:10px}
.cta-band p{color:var(--muted);max-width:44em;position:relative;z-index:1}
.cta-band .cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1;flex:0 0 auto}

/* ===== 资讯 ===== */
.news-layout{
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  gap:28px;align-items:start;
}
.news-lead{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
  display:block;
}
.news-lead:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--sh-2)}
.news-lead img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--alt)}
.news-lead-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:12px}
.news-lead-body h3{font-size:23px}
.news-lead-body p{font-size:15px;color:var(--muted)}
.news-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--muted);flex-wrap:wrap}
.news-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--border)}
.news-list{display:flex;flex-direction:column;gap:16px}
.news-item{
  display:grid;grid-template-columns:120px minmax(0,1fr);gap:16px;
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:14px;box-shadow:var(--sh-1);
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.news-item:hover{transform:translateY(-3px);border-color:var(--ink);box-shadow:var(--sh-2)}
.news-item img{width:100%;height:100%;min-height:88px;object-fit:cover;border-radius:12px;background:var(--alt)}
.news-item-body{display:flex;flex-direction:column;gap:6px;justify-content:center}
.news-item-body h3{
  font-size:16.5px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-item-body p{
  font-size:13.5px;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-empty{
  grid-column:1 / -1;
  background:var(--card);border:1px dashed var(--border);border-radius:var(--r-card);
  padding:56px 24px;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:12px;
}
.news-empty svg{color:var(--muted)}
.news-empty p{color:var(--muted);font-size:15px}

/* ===== FAQ ===== */
.faq-list{border-top:1px solid var(--border)}
.faq-list details{border-bottom:1px solid var(--border)}
.faq-list summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;gap:18px;
  padding:24px 4px;
  transition:color .2s var(--ease);
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary:hover{color:var(--ink)}
.faq-idx{
  font-family:var(--font-num);font-size:15px;font-weight:700;
  color:var(--muted);letter-spacing:.06em;flex:0 0 auto;
}
.faq-q{flex:1;font-size:17.5px;font-weight:600;color:var(--heading)}
.faq-arrow{
  flex:0 0 auto;color:var(--muted);
  transition:transform .3s var(--ease),color .3s var(--ease);
}
.faq-list details[open] .faq-arrow{transform:rotate(180deg);color:var(--ink)}
.faq-a{padding:0 4px 26px 48px;font-size:16px;color:var(--text);max-width:56em}

/* ===== 页脚 ===== */
.site-footer{background:var(--ink-deep);color:rgba(255,255,255,.72);margin-top:var(--sec-y);padding:72px 0 0}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:52px;border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand{display:flex;flex-direction:column;gap:16px}
.footer-brand .logo-text b{color:#fff}
.footer-brand .logo-text small{color:rgba(255,255,255,.5)}
.footer-brand p{font-size:14.5px;line-height:1.8;max-width:30em}
.footer-contact{display:flex;flex-direction:column;gap:8px;font-size:14.5px}
.footer-contact a{color:#fff;font-weight:600}
.footer-contact a:hover{color:var(--accent)}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:18px;font-weight:700}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14.5px;transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:24px 0;font-size:13.5px;color:rgba(255,255,255,.5);
}

/* ===== 动效 ===== */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.js .reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .js .reveal{opacity:1;transform:none}
}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  :root{--pad-x:24px;--sec-y:84px}
  .hero-grid{gap:40px}
  .main-nav{gap:16px}
  .search{max-width:420px}
}
@media (max-width:1023px){
  :root{--pad-x:24px;--sec-y:72px}
  .header-main{grid-template-columns:auto auto;gap:12px;padding-top:12px;padding-bottom:12px}
  .main-nav{display:none}
  .menu-btn{display:inline-flex}
  .search{grid-column:1 / -1;max-width:none;order:3;margin:0}
  .hero{padding-top:40px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media img{aspect-ratio:16/10}
  .hero-badge{left:auto;right:16px;bottom:16px}
  .deal-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .deal-card--lead{grid-column:span 2}
  .review-track{grid-auto-columns:calc((100% - 24px) / 2)}
  .guarantee-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:44px 36px}
  .news-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  :root{--pad-x:16px;--sec-y:56px}
  body{font-size:16px}
  .topbar-inner{flex-direction:column;align-items:flex-start;gap:4px;padding:8px 0}
  .topbar-right{gap:14px}
  .logo-mark{width:34px;height:34px}
  .logo-text b{font-size:17px}
  .search{height:46px;padding-left:40px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
  .hero-stats .num{font-size:24px}
  .chip-row{grid-auto-columns:minmax(140px,60%)}
  .deal-grid{grid-template-columns:1fr;gap:18px}
  .deal-card--lead{grid-column:span 1}
  .deal-card--lead .deal-cover img{aspect-ratio:3/2}
  .deal-card--lead h3{font-size:21px}
  .review-track{grid-auto-columns:82%}
  .guarantee{padding:48px 0}
  .guarantee-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  .cta-band{padding:34px 24px;border-radius:20px}
  .cta-band .cta-actions{width:100%}
  .cta-band .cta-actions .btn{flex:1}
  .news-item{grid-template-columns:96px minmax(0,1fr)}
  .faq-a{padding-left:4px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px}
}

/* roulang page: category1 */
/* ===================== 设计变量 ===================== */
:root{
  --brand:#0B3B3C;
  --brand-deep:#072A2B;
  --brand-soft:#E6EFEE;
  --accent:#FF6A2B;
  --accent-deep:#E85A1E;
  --accent-soft:#FFF1E8;
  --ink:#14161A;
  --text:#3A4247;
  --muted:#6B7478;
  --border:#E3DFD6;
  --surface:#EFECE5;
  --bg:#F6F4EF;
  --white:#FFFFFF;
  --ok:#2E7D5B;
  --warn:#B45309;
  --r-card:16px;
  --r-img:14px;
  --r-pill:999px;
  --r-badge:6px;
  --sh-1:0 1px 2px rgba(20,22,26,.04);
  --sh-2:0 14px 36px -22px rgba(11,59,60,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-num:"Inter","Oswald","Helvetica Neue",Arial,sans-serif;
  --gap-desk:120px;
  --gap-tab:72px;
  --gap-mob:56px;
}

/* ===================== reset / base ===================== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;background:var(--surface);}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:var(--accent-deep);}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.018em;line-height:1.25;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}

/* ===================== 布局容器 ===================== */
.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 32px;
}
.section{padding:var(--gap-desk) 0;}
.section--tight{padding:72px 0;}
.section--surface{background:var(--surface);}
.section--white{background:var(--white);}

/* ===================== 顶部信息条 ===================== */
.topbar{
  background:var(--brand-deep);
  color:rgba(255,255,255,.78);
  font-size:13px;
  line-height:1;
}
.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:40px;
}
.topbar-note{letter-spacing:.01em;}
.topbar-links{display:flex;align-items:center;gap:18px;}
.topbar-links a{color:rgba(255,255,255,.86);}
.topbar-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}

/* ===================== 头部 / 导航 ===================== */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,244,239,.96);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.is-stuck{
  border-bottom-color:var(--border);
  box-shadow:0 10px 28px -24px rgba(11,59,60,.45);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:78px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.logo-mark{
  width:38px;height:38px;
  display:grid;place-items:center;
  background:var(--brand);
  border-radius:12px;
  flex:0 0 auto;
}
.logo-text{display:flex;flex-direction:column;line-height:1.1;}
.logo-text b{font-size:19px;font-weight:800;color:var(--ink);letter-spacing:-.02em;}
.logo-text small{
  font-family:var(--font-num);
  font-size:10.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}
.search-form{
  position:relative;
  flex:1 1 auto;
  max-width:520px;
  display:flex;
  align-items:center;
  height:50px;
  background:var(--white);
  border:1px solid var(--border);
  border-radius:var(--r-pill);
  padding:0 6px 0 18px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.search-form:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(11,59,60,.09);
}
.search-icon{display:grid;place-items:center;color:var(--muted);flex:0 0 auto;}
.search-form input{
  flex:1 1 auto;
  min-width:0;
  border:0;
  background:transparent;
  height:100%;
  padding:0 12px;
  font-size:15px;
  outline:none;
}
.search-form input::placeholder{color:var(--muted);}
.search-submit{
  width:38px;height:38px;
  border-radius:50%;
  background:var(--accent);
  color:#fff;
  display:grid;place-items:center;
  flex:0 0 auto;
  transition:background .22s var(--ease),transform .22s var(--ease);
}
.search-submit:hover{background:var(--accent-deep);transform:translateY(-1px);}
.main-nav{
  display:flex;
  align-items:center;
  gap:20px;
  margin-left:auto;
  flex:0 0 auto;
}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:600;
  color:var(--text);
  white-space:nowrap;
  padding:6px 0;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .28s var(--ease);
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--brand);}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--brand);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--border);
  border-radius:12px;
  background:var(--white);
  place-items:center;
  flex:0 0 auto;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  background:var(--ink);
  margin:3px 0;
  border-radius:2px;
}

/* 移动抽屉 */
.drawer{
  display:none;
  border-top:1px solid var(--border);
  background:var(--white);
  padding:18px 0 26px;
}
.drawer.is-open{display:block;}
.drawer .container{display:grid;gap:14px;}
.drawer-link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:12px 2px;
  border-bottom:1px solid var(--border);
  font-size:16px;
  font-weight:600;
  color:var(--ink);
}
.drawer-contact{font-size:14px;color:var(--muted);}
.drawer-contact a{color:var(--brand);font-weight:600;}

/* ===================== 按钮 ===================== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:50px;
  padding:0 28px;
  border-radius:var(--r-pill);
  font-size:16px;
  font-weight:600;
  letter-spacing:.01em;
  border:1.5px solid transparent;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--accent-deep);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);background:#D14E16;}
.btn-ghost{background:transparent;color:var(--brand);border-color:var(--brand);}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep);transform:translateY(-1px);}
.btn-light{background:#fff;color:var(--brand);}
.btn-light:hover{background:var(--accent-soft);color:var(--accent-deep);transform:translateY(-1px);}
.btn-sm{height:42px;padding:0 20px;font-size:14.5px;}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:600;
  color:var(--brand);
  position:relative;
}
.text-link::after{
  content:"";
  position:absolute;
  left:0;bottom:-3px;
  width:100%;height:1.5px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .28s var(--ease);
}
.text-link:hover::after{transform:scaleX(1);}
.text-link svg{transition:transform .22s var(--ease);}
.text-link:hover svg{transform:translateX(3px);}

/* ===================== 徽章 / 标签 ===================== */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:var(--r-badge);
  background:var(--brand-soft);
  color:var(--brand-deep);
  font-size:13px;
  font-weight:600;
  letter-spacing:.01em;
}
.badge-accent{background:var(--accent-soft);color:#A63C0D;}
.badge-dark{background:var(--brand);color:#fff;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-num);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--brand);
}
.eyebrow::before{
  content:"";
  width:4px;height:14px;
  background:var(--accent);
  border-radius:2px;
}

/* ===================== 面包屑 ===================== */
.crumbs{
  font-size:14px;
  color:var(--muted);
  padding:26px 0 0;
}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs li+li::before{content:"/";color:var(--border);}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--accent-deep);}
.crumbs .current{color:var(--ink);font-weight:600;}

/* ===================== Hero ===================== */
.hero{padding:48px 0 var(--gap-desk);}
.hero-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.hero-copy h1{
  font-size:clamp(32px,4.2vw,50px);
  font-weight:800;
  margin:18px 0 16px;
}
.hero-copy .lede{
  font-size:17.5px;
  color:var(--text);
  max-width:52ch;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin:30px 0 34px;
}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:22px;
  border-top:1px solid var(--border);
  padding-top:24px;
}
.stat-num{
  font-family:var(--font-num);
  font-size:30px;
  font-weight:700;
  color:var(--brand);
  letter-spacing:.01em;
  line-height:1.1;
}
.stat-num small{font-size:15px;font-weight:600;color:var(--muted);margin-left:3px;}
.stat-label{font-size:13.5px;color:var(--muted);margin-top:6px;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
  border-radius:20px;
  box-shadow:var(--sh-2);
}
.float-card{
  position:absolute;
  left:-22px;
  bottom:26px;
  background:var(--white);
  border:1px solid var(--border);
  border-radius:14px;
  box-shadow:var(--sh-2);
  padding:14px 18px;
  display:flex;
  align-items:center;
  gap:12px;
  max-width:280px;
}
.float-card .fc-icon{
  width:38px;height:38px;
  border-radius:10px;
  background:var(--brand-soft);
  color:var(--brand);
  display:grid;place-items:center;
  flex:0 0 auto;
}
.float-card b{display:block;font-size:14.5px;color:var(--ink);}
.float-card span{font-size:12.5px;color:var(--muted);}

/* ===================== 板块标题 ===================== */
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:28px;
  margin-bottom:40px;
}
.section-head h2{
  font-size:clamp(26px,3vw,36px);
  font-weight:700;
  padding-left:16px;
  border-left:4px solid var(--accent);
}
.section-head .sub{
  margin-top:10px;
  padding-left:16px;
  color:var(--muted);
  font-size:15.5px;
  max-width:62ch;
}

/* ===================== 信息卡横排 ===================== */
.info-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:22px;
}
.info-card{
  background:var(--white);
  border:1px solid var(--border);
  border-radius:var(--r-card);
  padding:24px 22px;
  box-shadow:var(--sh-1);
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.info-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--sh-2);}
.info-card .ic-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.info-card .ic-icon{
  width:44px;height:44px;
  border-radius:12px;
  background:var(--brand-soft);
  color:var(--brand);
  display:grid;place-items:center;
}
.info-card .ic-index{
  font-family:var(--font-num);
  font-size:26px;
  font-weight:700;
  color:rgba(11,59,60,.16);
  letter-spacing:.02em;
}
.info-card h3{font-size:19px;font-weight:600;margin-bottom:8px;}
.info-card p{font-size:14.8px;color:var(--text);}
.info-card .ic-meta{
  margin-top:14px;
  padding-top:14px;
  border-top:1px dashed var(--border);
  font-size:13px;
  color:var(--muted);
}

/* ===================== 图文交错 ===================== */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
  padding:44px 0;
  border-bottom:1px solid var(--border);
}
.split:last-of-type{border-bottom:0;padding-bottom:0;}
.split:first-of-type{padding-top:0;}
.split.reverse .split-media{order:2;}
.split-media img{
  width:100%;
  aspect-ratio:3/2;
  object-fit:cover;
  border-radius:var(--r-img);
  transition:transform .4s var(--ease);
}
.split-media{overflow:hidden;border-radius:var(--r-img);}
.split-media:hover img{transform:scale(1.04);}
.split-body h3{
  font-size:clamp(21px,2.2vw,27px);
  font-weight:700;
  margin:14px 0 14px;
}
.split-body p{color:var(--text);}
.point-list{margin-top:20px;display:grid;gap:12px;}
.point-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:15.4px;
}
.point-list li::before{
  content:"";
  width:8px;height:8px;
  border-radius:2px;
  background:var(--accent);
  flex:0 0 auto;
  margin-top:9px;
}
.point-list b{color:var(--ink);font-weight:600;}

/* ===================== 数据条 ===================== */
.data-band{
  background:var(--brand-soft);
  border-radius:20px;
  padding:44px 40px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:28px;
}
.data-item .num{
  font-family:var(--font-num);
  font-size:clamp(28px,3.4vw,40px);
  font-weight:700;
  color:var(--brand);
  line-height:1.05;
  letter-spacing:.01em;
}
.data-item .num small{font-size:16px;font-weight:600;margin-left:2px;}
.data-item .txt{font-size:14.5px;color:var(--text);margin-top:10px;}
.data-item + .data-item{border-left:1px solid rgba(11,59,60,.14);padding-left:28px;}

/* ===================== FAQ ===================== */
.faq-list{border-top:1px solid var(--border);}
.faq-item{border-bottom:1px solid var(--border);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  gap:18px;
  padding:24px 4px;
  font-size:17.5px;
  font-weight:600;
  color:var(--ink);
  transition:color .22s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand);}
.faq-item .q-index{
  font-family:var(--font-num);
  font-size:15px;
  font-weight:700;
  color:var(--accent);
  letter-spacing:.06em;
  flex:0 0 auto;
}
.faq-item .q-arrow{
  margin-left:auto;
  flex:0 0 auto;
  color:var(--muted);
  transition:transform .3s var(--ease);
}
.faq-item[open] .q-arrow{transform:rotate(180deg);color:var(--brand);}
.faq-item .q-body{
  padding:0 4px 26px 46px;
  color:var(--text);
  font-size:15.6px;
  max-width:78ch;
}

/* ===================== CTA ===================== */
.cta-band{
  position:relative;
  overflow:hidden;
  background:var(--brand);
  border-radius:22px;
  padding:56px 48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  color:#fff;
}
.cta-band::before{
  content:"";
  position:absolute;
  right:-120px;top:-140px;
  width:460px;height:460px;
  border:2px solid rgba(255,255,255,.12);
  border-radius:50%;
  pointer-events:none;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-60px;bottom:-190px;
  width:340px;height:340px;
  border:2px solid rgba(255,255,255,.09);
  border-radius:50%;
  pointer-events:none;
}
.cta-copy{position:relative;z-index:1;max-width:60ch;}
.cta-copy h2{color:#fff;font-size:clamp(24px,2.8vw,34px);font-weight:700;}
.cta-copy p{color:rgba(255,255,255,.78);margin-top:12px;font-size:15.5px;}
.cta-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:14px;flex:0 0 auto;}
.cta-note{
  position:relative;z-index:1;
  margin-top:22px;
  display:flex;
  flex-wrap:wrap;
  gap:24px;
  font-size:13.5px;
  color:rgba(255,255,255,.66);
}

/* ===================== 页脚 ===================== */
.site-footer{
  background:var(--brand-deep);
  color:rgba(255,255,255,.7);
  padding:72px 0 30px;
  font-size:14.5px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:44px;
  padding-bottom:44px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.site-footer .logo-text b{color:#fff;}
.site-footer .logo-text small{color:rgba(255,255,255,.5);}
.footer-brand p{margin:18px 0 20px;max-width:38ch;color:rgba(255,255,255,.66);}
.footer-contact{display:grid;gap:8px;font-size:14px;}
.footer-contact a{color:#fff;font-weight:600;}
.footer-contact a:hover{color:var(--accent);}
.footer-col h4{
  color:#fff;
  font-size:15.5px;
  font-weight:700;
  margin-bottom:18px;
}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{color:rgba(255,255,255,.68);}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
  padding-top:24px;
  font-size:13.5px;
  color:rgba(255,255,255,.55);
}

/* ===================== 动效 ===================== */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
.reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ===================== 响应式 ===================== */
@media (max-width:1279px){
  .container{padding:0 24px;}
  .section{padding:88px 0;}
  .hero-grid{gap:40px;}
  .search-form{max-width:420px;}
}

@media (max-width:1023px){
  .section{padding:var(--gap-tab) 0;}
  .header-inner{flex-wrap:wrap;row-gap:14px;padding-top:14px;padding-bottom:14px;min-height:auto;}
  .logo{order:1;}
  .nav-toggle{order:2;display:grid;margin-left:auto;}
  .search-form{order:3;flex:1 1 100%;max-width:none;}
  .main-nav{display:none;}
  .hero{padding:36px 0 var(--gap-tab);}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-media{order:-1;}
  .float-card{left:14px;bottom:14px;}
  .info-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .split{grid-template-columns:1fr;gap:28px;padding:36px 0;}
  .split.reverse .split-media{order:0;}
  .data-band{grid-template-columns:repeat(2,minmax(0,1fr));padding:36px 28px;gap:24px;}
  .data-item + .data-item{border-left:0;padding-left:0;}
  .data-item{border-top:1px solid rgba(11,59,60,.14);padding-top:20px;}
  .data-item:nth-child(1),.data-item:nth-child(2){border-top:0;padding-top:0;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:44px 32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
}

@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 16px;}
  .section{padding:var(--gap-mob) 0;}
  .topbar-note{display:none;}
  .topbar-inner{justify-content:center;}
  .hero-copy h1{font-size:clamp(28px,7vw,34px);}
  .hero-actions{gap:10px;}
  .hero-actions .btn{flex:1 1 100%;}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
  .info-grid{grid-template-columns:1fr;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:28px;}
  .data-band{grid-template-columns:1fr;padding:28px 20px;}
  .data-item{border-top:1px solid rgba(11,59,60,.14);padding-top:18px;}
  .data-item:nth-child(2){border-top:1px solid rgba(11,59,60,.14);padding-top:18px;}
  .faq-item summary{font-size:16px;gap:12px;padding:20px 0;}
  .faq-item .q-body{padding:0 0 22px 30px;}
  .cta-band{padding:34px 22px;border-radius:18px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:32px;}
  .site-footer{padding:52px 0 24px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: article */
/* ===== 设计令牌 ===== */
:root{
  --ink:#0B3B3C;
  --ink-deep:#072A2B;
  --ink-soft:#E6EFEE;
  --orange:#FF6A2B;
  --orange-dark:#E85A1E;
  --orange-soft:#FFF1E8;
  --title:#14161A;
  --text:#3A4247;
  --muted:#6B7478;
  --border:#E3DFD6;
  --bg:#F6F4EF;
  --bg-soft:#EFECE5;
  --white:#FFFFFF;
  --success:#2E7D5B;
  --warn:#B45309;
  --r-card:16px;
  --r-img:14px;
  --r-pill:999px;
  --r-badge:6px;
  --sh-1:0 1px 2px rgba(20,22,26,.04);
  --sh-2:0 14px 36px -22px rgba(11,59,60,.22);
  --container:1280px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ===== Reset / Base ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:17px;
  line-height:1.75;
  letter-spacing:.005em;
  overflow-x:hidden;
}
img{max-width:100%;display:block;background:var(--bg-soft);}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--orange-dark);}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4{margin:0;color:var(--title);line-height:1.25;letter-spacing:-.015em;font-weight:700;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px;border-radius:4px;}
.num,.en{font-variant-numeric:tabular-nums;letter-spacing:.02em;font-feature-settings:"tnum";}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}

/* ===== 通用按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 28px;border-radius:var(--r-pill);
  font-size:16px;font-weight:600;letter-spacing:.01em;
  transition:transform .25s var(--ease),background-color .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 10px 24px -16px rgba(255,106,43,.9);}
.btn-primary:hover{background:var(--orange-dark);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink);}
.btn-ghost:hover{background:var(--ink-soft);color:var(--ink-deep);transform:translateY(-1px);}
.btn-light{background:#fff;color:var(--ink);}
.btn-light:hover{background:var(--ink-soft);color:var(--ink-deep);transform:translateY(-1px);}
.btn-sm{min-height:42px;padding:0 20px;font-size:15px;}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;transform:none;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--ink);
  position:relative;
}
.link-arrow::after{
  content:"";position:absolute;left:0;bottom:-3px;height:1.5px;width:100%;
  background:var(--orange);transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);
}
.link-arrow:hover::after{transform:scaleX(1);}
.link-arrow svg{transition:transform .25s var(--ease);}
.link-arrow:hover svg{transform:translateX(3px);}

/* ===== 徽章 / 标签 ===== */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-badge);
  font-size:13px;font-weight:600;line-height:1.6;
  background:var(--ink-soft);color:var(--ink-deep);
}
.badge-orange{background:var(--orange-soft);color:var(--orange-dark);}

/* ===== 顶部信息条 ===== */
.topbar{background:var(--ink-deep);color:#CFE0DE;font-size:13px;}
.topbar-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:38px;flex-wrap:wrap;
}
.topbar-note{letter-spacing:.02em;}
.topbar-links{display:flex;align-items:center;gap:18px;}
.topbar-links a{color:#CFE0DE;border-bottom:1px solid transparent;transition:color .2s,border-color .2s;}
.topbar-links a:hover{color:#fff;border-bottom-color:var(--orange);}

/* ===== 头部 ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,244,239,.94);
  backdrop-filter:saturate(1.2) blur(6px);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--border);box-shadow:0 8px 24px -22px rgba(11,59,60,.5);}
.header-main{background:transparent;}
.header-inner{
  display:flex;align-items:center;gap:28px;
  min-height:78px;
}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand:hover{color:inherit;}
.brand svg{width:40px;height:40px;flex:0 0 auto;}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text b{font-size:19px;font-weight:800;color:var(--ink-deep);letter-spacing:.01em;}
.logo-text small{font-size:11px;color:var(--muted);letter-spacing:.14em;text-transform:uppercase;}

.nav-search{
  flex:1 1 auto;max-width:560px;min-width:280px;
  display:flex;align-items:center;gap:8px;
  height:50px;padding:0 6px 0 18px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-pill);
  box-shadow:var(--sh-1);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.nav-search:focus-within{border-color:var(--ink);box-shadow:0 0 0 4px rgba(11,59,60,.08);}
.nav-search .ico{width:18px;height:18px;color:var(--muted);flex:0 0 auto;}
.nav-search input{
  flex:1 1 auto;min-width:0;border:0;background:transparent;height:100%;
  font-size:15px;outline:none;
}
.nav-search input::placeholder{color:#9AA3A6;}
.search-submit{
  flex:0 0 auto;width:38px;height:38px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--ink);color:#fff;transition:background-color .25s var(--ease),transform .25s var(--ease);
}
.search-submit:hover{background:var(--orange);transform:translateY(-1px);}
.search-submit svg{width:17px;height:17px;}

.main-nav{display:flex;align-items:center;gap:22px;flex:0 0 auto;}
.nav-link{
  position:relative;font-size:15px;font-weight:600;color:var(--text);
  padding:6px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--orange);transform:scaleX(0);transform-origin:left;
  transition:transform .28s var(--ease);
}
.nav-link:hover{color:var(--ink-deep);}
.nav-link:hover::after,.nav-link[aria-current="page"]::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--ink-deep);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--border);
  align-items:center;justify-content:center;background:#fff;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-deep);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-deep);
  transition:transform .25s var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

.drawer{
  display:none;border-top:1px solid var(--border);background:#fff;
}
.drawer.is-open{display:block;}
.drawer-inner{padding:18px 0 26px;}
.drawer-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:16px;}
.drawer-nav a{
  padding:12px 4px;font-size:16px;font-weight:600;color:var(--ink-deep);
  border-bottom:1px solid var(--border);
}
.drawer-meta{display:flex;flex-direction:column;gap:8px;font-size:14px;color:var(--muted);margin-bottom:16px;}

/* ===== 阅读进度条 ===== */
.read-progress{
  position:fixed;top:0;left:0;height:2px;width:0;background:var(--orange);
  z-index:120;transition:width .12s linear;
}

/* ===== 面包屑 ===== */
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13.5px;color:var(--muted);padding:22px 0 6px;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--ink);}
.breadcrumb .sep{color:#C4C0B6;}
.breadcrumb .current{color:var(--ink-deep);font-weight:600;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ===== 文章头部 ===== */
.article-head{padding:12px 0 34px;border-bottom:1px solid var(--border);}
.article-head .badge{margin-bottom:16px;}
.article-title{
  font-size:clamp(28px,4.2vw,44px);
  font-weight:800;letter-spacing:-.02em;line-height:1.22;
  max-width:920px;margin-bottom:20px;
}
.article-meta{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  font-size:14px;color:var(--muted);
}
.article-meta b{color:var(--title);font-weight:600;}
.article-meta .dot{width:1px;height:14px;background:var(--border);display:inline-block;}

/* ===== 文章布局 ===== */
.article-wrap{
  display:grid;grid-template-columns:minmax(0,1fr);
  gap:48px;padding:48px 0 96px;
}
.article-main{min-width:0;}
.article-body{
  max-width:760px;
  font-size:17.5px;line-height:1.9;color:var(--text);
}
.article-body>*+*{margin-top:1.2em;}
.article-body h2{
  position:relative;font-size:26px;font-weight:700;line-height:1.4;
  margin-top:2.4em;margin-bottom:.7em;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;width:4px;height:1.05em;
  border-radius:2px;background:var(--ink);
}
.article-body h3{font-size:20.5px;font-weight:600;margin-top:1.9em;margin-bottom:.6em;}
.article-body p{margin:0;}
.article-body a{color:var(--ink);border-bottom:1px solid rgba(11,59,60,.35);}
.article-body a:hover{color:var(--orange-dark);border-bottom-color:var(--orange);}
.article-body strong{color:var(--title);font-weight:700;}
.article-body img{border-radius:12px;margin:1.6em 0 .6em;width:100%;height:auto;}
.article-body figure{margin:1.8em 0;}
.article-body figcaption{font-size:13.5px;color:var(--muted);text-align:center;line-height:1.7;}
.article-body blockquote{
  margin:1.8em 0;padding:16px 22px;border-left:3px solid var(--ink);
  background:var(--ink-soft);border-radius:0 12px 12px 0;
  color:var(--ink-deep);font-size:16.5px;
}
.article-body ul,.article-body ol{margin:1.2em 0;padding-left:0;}
.article-body li{position:relative;padding-left:24px;margin:.55em 0;}
.article-body ul li::before{
  content:"";position:absolute;left:4px;top:.72em;width:8px;height:8px;
  border-radius:2px;background:var(--ink);
}
.article-body ol{counter-reset:olc;}
.article-body ol li{counter-increment:olc;}
.article-body ol li::before{
  content:counter(olc,decimal-leading-zero);
  position:absolute;left:0;top:0;font-size:13px;font-weight:700;color:var(--orange-dark);
}
.article-body table{
  width:100%;border-collapse:separate;border-spacing:0;
  border:1px solid var(--border);border-radius:12px;overflow:hidden;
  font-size:15.5px;margin:1.6em 0;
}
.article-body thead th{
  background:var(--ink-soft);color:var(--ink-deep);font-weight:700;text-align:left;
  padding:12px 16px;font-size:14.5px;
}
.article-body tbody td{padding:12px 16px;border-top:1px solid var(--border);}
.article-body tbody tr:nth-child(even){background:#FBFAF7;}
.article-body .table-scroll{overflow-x:auto;margin:1.6em 0;}

/* 空态 */
.empty-state{
  max-width:640px;margin:0 auto;text-align:center;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:56px 28px;box-shadow:var(--sh-1);
}
.empty-state svg{width:52px;height:52px;color:#B9B4A8;margin:0 auto 16px;}
.empty-state h2{font-size:22px;margin-bottom:10px;}
.empty-state p{color:var(--muted);margin-bottom:22px;font-size:15.5px;}

/* ===== 分栏卡片 / 相关推荐 ===== */
.section{padding:72px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(24px,3vw,32px);font-weight:700;}
.section-head p{color:var(--muted);font-size:15px;margin-top:8px;}

.pager-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.pager-card{
  display:block;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:22px 24px;box-shadow:var(--sh-1);
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.pager-card:hover{transform:translateY(-3px);border-color:var(--ink);box-shadow:var(--sh-2);}
.pager-card span{display:block;font-size:12.5px;font-weight:700;letter-spacing:.08em;color:var(--orange-dark);margin-bottom:10px;}
.pager-card h3{font-size:18px;font-weight:600;line-height:1.5;margin-bottom:8px;}
.pager-card p{font-size:14px;color:var(--muted);}

.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--sh-2);}
.card-cover{aspect-ratio:3/2;overflow:hidden;background:var(--bg-soft);}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease);}
.card:hover .card-cover img{transform:scale(1.04);}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body .badge{align-self:flex-start;}
.card-body h3{font-size:19px;font-weight:600;line-height:1.5;}
.card-body p{font-size:14.5px;color:var(--muted);}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:6px;font-size:14px;}

/* ===== FAQ ===== */
.faq-list{border-top:1px solid var(--border);}
.faq-item{border-bottom:1px solid var(--border);}
.faq-item summary{
  display:flex;align-items:center;gap:18px;padding:22px 4px;
  cursor:pointer;list-style:none;font-size:17.5px;font-weight:600;color:var(--title);
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--ink);}
.faq-item .faq-idx{font-size:13px;font-weight:700;color:var(--orange-dark);flex:0 0 auto;}
.faq-item summary .faq-arrow{margin-left:auto;flex:0 0 auto;transition:transform .3s var(--ease);color:var(--muted);}
.faq-item[open] summary .faq-arrow{transform:rotate(180deg);}
.faq-item .faq-a{padding:0 4px 24px 46px;color:var(--text);font-size:16px;max-width:880px;}

/* ===== CTA ===== */
.cta-band{
  position:relative;overflow:hidden;background:var(--ink);color:#EAF3F2;
  border-radius:24px;padding:56px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{color:#fff;font-size:clamp(24px,3vw,34px);margin-bottom:12px;}
.cta-band p{color:#B9CFCD;font-size:16px;max-width:640px;}
.cta-band .cta-acts{display:flex;gap:14px;flex-wrap:wrap;}
.cta-band .deco{position:absolute;right:-60px;bottom:-90px;width:340px;opacity:.16;pointer-events:none;}
.cta-band .btn-ghost{border-color:rgba(234,243,242,.55);color:#EAF3F2;}
.cta-band .btn-ghost:hover{background:rgba(234,243,242,.12);color:#fff;}

/* ===== 页脚 ===== */
.site-footer{background:#14161A;color:#A9B0B4;margin-top:96px;font-size:14.5px;}
.site-footer .container{padding-top:64px;padding-bottom:28px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.site-footer .logo-text b{color:#fff;}
.site-footer .logo-text small{color:#7D868A;}
.footer-brand p{margin:18px 0;color:#9BA3A7;line-height:1.8;max-width:420px;}
.footer-contact{display:flex;flex-direction:column;gap:8px;font-size:14px;color:#8C9599;}
.footer-contact a{color:#EAF3F2;}
.footer-contact a:hover{color:var(--orange);}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;letter-spacing:.01em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{color:#A9B0B4;transition:color .2s var(--ease),padding-left .2s var(--ease);}
.footer-col a:hover{color:#fff;padding-left:4px;}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid #262A2E;
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:#7D868A;
}

/* ===== 动效 ===== */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  .container{padding:0 24px;}
  .nav-search{max-width:420px;min-width:220px;}
  .main-nav{gap:16px;}
}
@media (max-width:1023px){
  .container{padding:0 24px;}
  .header-inner{flex-wrap:wrap;gap:14px;padding:12px 0;}
  .nav-search{order:3;flex:1 1 100%;max-width:none;min-width:0;height:48px;}
  .main-nav{display:none;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{padding:44px 32px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 16px;}
  .topbar-inner{min-height:34px;font-size:12.5px;}
  .topbar-note{display:none;}
  .header-inner{gap:12px;}
  .logo-text b{font-size:17px;}
  .article-title{font-size:26px;}
  .article-body{font-size:16.5px;line-height:1.85;}
  .article-body h2{font-size:22px;padding-left:14px;}
  .article-wrap{padding:32px 0 64px;}
  .pager-grid{grid-template-columns:1fr;}
  .related-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .section{padding:56px 0;}
  .cta-band{padding:34px 22px;border-radius:18px;}
  .cta-band .cta-acts{width:100%;}
  .cta-band .btn{width:100%;}
  .faq-item summary{font-size:16px;gap:12px;}
  .faq-item .faq-a{padding-left:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .article-body table{font-size:14px;}
  .breadcrumb .current{white-space:normal;}
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root{
  --ink:#0B3B3C;
  --ink-deep:#072A2B;
  --ink-soft:#E6EFEE;
  --accent:#FF6A2B;
  --accent-dark:#E85A1E;
  --accent-soft:#FFF1E8;
  --title:#14161A;
  --text:#3A4247;
  --muted:#6B7478;
  --line:#E3DFD6;
  --surface:#EFECE5;
  --bg:#F6F4EF;
  --card:#FFFFFF;
  --success:#2E7D5B;
  --warn:#B45309;
  --r-card:16px;
  --r-img:14px;
  --r-btn:999px;
  --r-badge:6px;
  --sh-1:0 1px 2px rgba(20,22,26,.04);
  --sh-2:0 14px 36px -22px rgba(11,59,60,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:.25s cubic-bezier(.2,.7,.3,1);
  --font:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
}
/* ===== reset / base ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;background:var(--ink-soft);}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:none;background:none;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
::selection{background:var(--accent);color:#fff;}

/* ===== 布局容器 ===== */
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 32px;}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section-head{max-width:760px;margin:0 auto 48px;text-align:center;}
.section-head--left{max-width:820px;margin:0 0 44px;text-align:left;}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:.08em;font-weight:600;
  color:var(--ink);background:var(--ink-soft);border-radius:var(--r-badge);
  padding:5px 12px;
}
h2{font-size:clamp(26px,3.3vw,38px);font-weight:700;letter-spacing:-.02em;color:var(--title);line-height:1.25;}
h3{font-size:20px;font-weight:600;letter-spacing:-.01em;color:var(--title);line-height:1.4;}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px;}
.rule{height:1px;background:var(--line);border:0;margin:0;}

/* ===== 顶部信息条 ===== */
.topbar{
  background:var(--ink-deep);color:#D8E5E4;font-size:13px;
  max-height:60px;overflow:hidden;transition:max-height .3s var(--ease);
}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:40px;}
.topbar__tag{display:inline-flex;align-items:center;gap:8px;}
.topbar__tag i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;font-style:normal;}
.topbar__links{display:flex;align-items:center;gap:20px;}
.topbar__links a{color:#D8E5E4;transition:color var(--t);}
.topbar__links a:hover{color:#fff;}

/* ===== 导航 ===== */
.site-header{position:sticky;top:0;z-index:50;background:var(--bg);transition:box-shadow var(--t);}
.site-header.is-stuck .topbar{max-height:0;}
.navbar{border-bottom:1px solid transparent;background:var(--bg);transition:border-color var(--t),box-shadow var(--t);}
.site-header.is-stuck .navbar{border-bottom-color:var(--line);box-shadow:0 8px 26px -22px rgba(11,59,60,.6);}
.navbar__inner{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;gap:28px;padding:14px 0;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{width:38px;height:38px;flex-shrink:0;}
.brand__text{display:flex;flex-direction:column;line-height:1.15;}
.brand__text b{font-size:18px;font-weight:800;letter-spacing:-.02em;color:var(--ink);}
.brand__text small{font-size:11px;letter-spacing:.14em;color:var(--muted);font-family:var(--font-num);text-transform:uppercase;}

.nav-search{
  display:flex;align-items:center;gap:8px;
  width:clamp(280px,34vw,520px);justify-self:center;
  height:48px;padding:0 6px 0 16px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-btn);
  transition:border-color var(--t),box-shadow var(--t);
}
.nav-search:focus-within{border-color:var(--ink);box-shadow:0 0 0 3px rgba(11,59,60,.08);}
.nav-search__icon{display:inline-flex;color:var(--muted);flex-shrink:0;}
.nav-search input{
  flex:1;min-width:0;height:100%;border:0;background:transparent;outline:none;
  font-size:15px;color:var(--title);
}
.nav-search input::placeholder{color:#9AA3A6;}
.nav-search input::-webkit-search-cancel-button{display:none;}
.nav-search__btn{
  width:36px;height:36px;flex-shrink:0;border-radius:50%;
  background:var(--accent);color:#fff;display:inline-flex;align-items:center;justify-content:center;
  transition:background var(--t),transform var(--t);
}
.nav-search__btn:hover{background:var(--accent-dark);transform:translateY(-1px);}

.main-nav{display:flex;align-items:center;gap:24px;}
.nav-link{
  position:relative;font-size:15px;color:var(--text);padding:6px 0;white-space:nowrap;
  transition:color var(--t);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--ink);
  transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--ink);font-weight:600;}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--accent);}

.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  align-items:center;justify-content:center;color:var(--ink);background:#fff;
}
.nav-toggle:hover{border-color:var(--ink);}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;z-index:80;background:rgba(7,42,43,.45);
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);
}
.drawer__panel{
  position:absolute;top:0;right:0;height:100%;width:min(340px,86vw);
  background:#fff;padding:22px;overflow-y:auto;
  transform:translateX(100%);transition:transform .3s var(--ease);
  box-shadow:-18px 0 42px -30px rgba(7,42,43,.6);
}
body.drawer-open{overflow:hidden;}
body.drawer-open .drawer{opacity:1;visibility:visible;}
body.drawer-open .drawer__panel{transform:none;}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer__head b{font-size:16px;color:var(--title);}
.drawer__close{
  width:36px;height:36px;border-radius:50%;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink);
}
.drawer__close:hover{border-color:var(--ink);}
.drawer__title{font-size:13px;color:var(--muted);letter-spacing:.08em;margin:24px 0 10px;}
.drawer__link{
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 0;border-bottom:1px solid var(--line);font-size:15px;color:var(--title);
  transition:color var(--t),padding-left var(--t);
}
.drawer__link:hover{color:var(--ink);padding-left:4px;}
.drawer__link[aria-current="page"]{color:var(--accent);font-weight:600;}
.drawer__foot{margin-top:26px;font-size:14px;color:var(--muted);line-height:2;}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 10px 24px -16px rgba(255,106,43,.9);}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-primary:disabled{background:#E0D7D0;color:#9AA3A6;box-shadow:none;cursor:not-allowed;}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink);}
.btn-ghost:hover{background:var(--ink-soft);transform:translateY(-1px);}
.btn-light{background:#fff;color:var(--ink);}
.btn-light:hover{background:var(--ink-soft);transform:translateY(-1px);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--ink);font-weight:600;font-size:15px;
  padding-bottom:2px;position:relative;
}
.btn-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1.5px;background:var(--ink);
  transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.btn-link:hover::after{transform:scaleX(1);}
.btn-link:hover svg{transform:translateX(2px);}
.btn-link svg{transition:transform var(--t);}

/* ===== 面包屑 ===== */
.crumb{padding:20px 0 0;}
.crumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);}
.crumb__list a{color:var(--muted);transition:color var(--t);}
.crumb__list a:hover{color:var(--ink);}
.crumb__list li[aria-current]{color:var(--title);font-weight:600;}

/* ===== Hero ===== */
.cat-hero{padding:44px 0 0;}
.cat-hero__inner{max-width:860px;margin:0 auto;text-align:center;}
.cat-hero h1{
  margin:18px 0 18px;font-size:clamp(30px,4.4vw,52px);font-weight:800;
  letter-spacing:-.02em;line-height:1.18;color:var(--title);
}
.cat-hero h1 em{font-style:normal;color:var(--ink);}
.cat-hero__lead{max-width:720px;margin:0 auto;font-size:17px;color:var(--text);}
.cat-hero__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:30px;}
.cat-hero__meta{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:22px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--ink);
  background:var(--ink-soft);border-radius:var(--r-badge);padding:5px 11px;
}
.tag--accent{background:var(--accent-soft);color:var(--accent-dark);}
.cat-hero__media{
  margin-top:46px;border-radius:20px;overflow:hidden;position:relative;
  aspect-ratio:16/7;box-shadow:var(--sh-2);
}
.cat-hero__media img{width:100%;height:100%;object-fit:cover;}
.cat-hero__badge{
  position:absolute;left:24px;bottom:24px;background:#fff;border-radius:14px;
  padding:14px 18px;box-shadow:0 14px 36px -20px rgba(11,59,60,.5);
  display:flex;align-items:center;gap:14px;
}
.cat-hero__badge b{font-family:var(--font-num);font-size:26px;font-weight:700;color:var(--ink);letter-spacing:.02em;line-height:1;}
.cat-hero__badge span{font-size:13px;color:var(--muted);}

/* ===== 数据条 ===== */
.stat-band{
  background:var(--ink-soft);border-radius:20px;padding:34px 36px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
}
.stat-item{border-left:1px solid rgba(11,59,60,.14);padding-left:20px;}
.stat-item:first-child{border-left:0;padding-left:0;}
.stat-item b{
  display:block;font-family:var(--font-num);font-size:clamp(26px,3vw,34px);font-weight:700;
  color:var(--ink);letter-spacing:.01em;line-height:1.1;
}
.stat-item span{display:block;margin-top:6px;font-size:14px;color:#4C6B6B;}

/* ===== 课程卡片网格 2×2 ===== */
.course-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;}
.course-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  box-shadow:var(--sh-1);transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.course-card:hover{transform:translateY(-3px);border-color:var(--ink);box-shadow:var(--sh-2);}
.course-card__media{aspect-ratio:3/2;overflow:hidden;position:relative;}
.course-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.course-card:hover .course-card__media img{transform:scale(1.04);}
.course-card__media .tag{position:absolute;left:16px;top:16px;background:rgba(255,255,255,.94);color:var(--ink);}
.course-card__body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1;}
.course-card__body h3{margin-bottom:8px;}
.course-card__sub{font-size:14px;color:var(--muted);}
.course-list{margin-top:16px;display:grid;gap:10px;}
.course-list li{display:flex;gap:10px;font-size:15px;color:var(--text);line-height:1.65;}
.course-list li::before{
  content:"";width:7px;height:7px;border-radius:2px;background:var(--accent);
  flex-shrink:0;margin-top:9px;
}
.course-card__foot{
  margin-top:auto;padding-top:20px;display:flex;align-items:center;justify-content:space-between;gap:12px;
  border-top:1px solid var(--line);
}
.course-card__price{font-family:var(--font-num);font-size:15px;color:var(--ink);font-weight:600;letter-spacing:.01em;}

/* ===== 流程 ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step;}
.step{padding-top:22px;border-top:2px solid var(--line);position:relative;}
.step::after{
  content:"";position:absolute;top:-2px;left:0;width:46px;height:2px;background:var(--accent);
}
.step b{
  display:block;font-family:var(--font-num);font-size:38px;font-weight:700;line-height:1;
  color:rgba(11,59,60,.18);letter-spacing:.02em;
}
.step h3{font-size:18px;margin:12px 0 8px;}
.step p{font-size:15px;color:var(--muted);}

/* ===== 窄栏长文 ===== */
.prose-narrow{max-width:760px;margin:0 auto;}
.prose-narrow h3{
  position:relative;padding-left:16px;margin:38px 0 14px;font-size:22px;
}
.prose-narrow h3::before{
  content:"";position:absolute;left:0;top:.28em;width:4px;height:1em;border-radius:2px;background:var(--ink);
}
.prose-narrow h3:first-child{margin-top:0;}
.prose-narrow p{font-size:17px;line-height:1.9;color:var(--text);}
.prose-narrow p + p{margin-top:1.1em;}
.prose-note{
  margin-top:26px;padding:20px 24px;border-left:3px solid var(--ink);
  background:var(--surface);border-radius:0 12px 12px 0;font-size:15.5px;color:var(--text);
}

/* ===== FAQ ===== */
.faq{max-width:880px;margin:0 auto;}
.faq details{border-bottom:1px solid var(--line);}
.faq details:first-of-type{border-top:1px solid var(--line);}
.faq summary{
  display:flex;align-items:center;gap:16px;padding:24px 4px;cursor:pointer;
  list-style:none;color:var(--title);font-size:17px;font-weight:600;
  transition:color var(--t);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--ink);}
.faq summary .idx{
  font-family:var(--font-num);font-size:14px;font-weight:600;letter-spacing:.06em;
  color:var(--accent);flex-shrink:0;width:26px;
}
.faq summary .chev{margin-left:auto;flex-shrink:0;color:var(--muted);transition:transform var(--t),color var(--t);}
.faq details[open] summary .chev{transform:rotate(180deg);color:var(--ink);}
.faq__answer{padding:0 4px 26px 42px;font-size:16px;line-height:1.85;color:var(--text);}

/* ===== CTA ===== */
.cta-band{
  position:relative;overflow:hidden;background:var(--ink);color:#EAF2F1;
  border-radius:24px;padding:56px 56px;display:flex;align-items:center;
  justify-content:space-between;gap:40px;flex-wrap:wrap;
}
.cta-band__deco{position:absolute;right:-60px;top:-60px;width:380px;opacity:.14;pointer-events:none;}
.cta-band__text{position:relative;max-width:600px;}
.cta-band__text h2{color:#fff;font-size:clamp(24px,3vw,34px);}
.cta-band__text p{margin-top:12px;font-size:16px;color:#B9D0CE;max-width:520px;}
.cta-band__actions{position:relative;display:flex;flex-wrap:wrap;gap:14px;}
.cta-band .btn-ghost{color:#fff;border-color:rgba(255,255,255,.5);}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.12);}

/* ===== 页脚 ===== */
.site-footer{background:var(--ink-deep);color:#B9D0CE;padding:72px 0 0;margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;}
.footer-brand .logo-text{display:flex;flex-direction:column;line-height:1.2;margin-bottom:16px;}
.footer-brand .logo-text b{font-size:20px;font-weight:800;color:#fff;letter-spacing:-.01em;}
.footer-brand .logo-text small{font-family:var(--font-num);font-size:11px;letter-spacing:.16em;color:#7FA09E;text-transform:uppercase;}
.footer-brand p{font-size:14.5px;line-height:1.85;color:#9EBAB8;max-width:340px;}
.footer-contact{margin-top:20px;display:grid;gap:8px;font-size:14px;color:#9EBAB8;}
.footer-contact a{color:#fff;font-weight:600;transition:color var(--t);}
.footer-contact a:hover{color:var(--accent);}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{font-size:14.5px;color:#9EBAB8;transition:color var(--t),padding-left var(--t);}
.footer-col a:hover{color:#fff;padding-left:3px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#7FA09E;
}

/* ===== 入场动效 ===== */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .55s var(--ease),transform .55s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  .container{padding:0 24px;}
  .section{padding:80px 0;}
}
@media (max-width:1023px){
  .navbar__inner{
    grid-template-columns:1fr auto;
    grid-template-areas:"brand toggle" "search search";
    row-gap:12px;padding:12px 0 14px;
  }
  .brand{grid-area:brand;}
  .nav-toggle{grid-area:toggle;display:inline-flex;}
  .nav-search{grid-area:search;width:100%;max-width:none;justify-self:stretch;}
  .main-nav{display:none;}
  .course-grid{grid-template-columns:repeat(2,1fr);}
  .stat-band{grid-template-columns:repeat(2,1fr);gap:26px 20px;padding:28px;}
  .stat-item:nth-child(3){border-left:0;padding-left:0;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cat-hero__media{aspect-ratio:16/9;}
  .cta-band{padding:44px 36px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .topbar{font-size:12px;}
  .topbar__tag{display:none;}
  .topbar__inner{justify-content:center;}
  .cat-hero{padding:28px 0 0;}
  .cat-hero__media{aspect-ratio:4/3;margin-top:32px;}
  .cat-hero__badge{left:14px;bottom:14px;padding:11px 14px;}
  .cat-hero__badge b{font-size:22px;}
  .cat-hero__actions .btn{width:100%;}
  .course-grid{grid-template-columns:1fr;}
  .stat-band{grid-template-columns:1fr;padding:24px;border-radius:16px;}
  .stat-item{border-left:0;padding-left:0;border-top:1px solid rgba(11,59,60,.14);padding-top:16px;}
  .stat-item:first-child{border-top:0;padding-top:0;}
  .steps{grid-template-columns:1fr;gap:28px;}
  .prose-narrow h3{font-size:19px;}
  .prose-narrow p{font-size:16px;}
  .faq summary{font-size:16px;padding:20px 2px;gap:12px;}
  .faq__answer{padding:0 2px 22px 38px;font-size:15px;}
  .cta-band{padding:36px 22px;border-radius:18px;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:34px;}
  .footer-bottom{justify-content:flex-start;}
  .site-footer{margin-top:56px;padding-top:52px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
/* ===================== 设计变量 ===================== */
:root{
  --brand:#0B3B3C;
  --brand-deep:#072A2B;
  --brand-light:#E6EFEE;
  --accent:#FF6A2B;
  --accent-hover:#E85A1E;
  --accent-light:#FFF1E8;
  --ink:#14161A;
  --text:#3A4247;
  --muted:#6B7478;
  --border:#E3DFD6;
  --surface:#FFFFFF;
  --page:#F6F4EF;
  --sand:#EFECE5;
  --success:#2E7D5B;
  --warn:#B45309;
  --r-card:16px;
  --r-img:14px;
  --r-pill:999px;
  --r-badge:6px;
  --sh-1:0 1px 2px rgba(20,22,26,.04);
  --sh-2:0 14px 36px -22px rgba(11,59,60,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-num:"Inter","Oswald","Helvetica Neue",Arial,sans-serif;
  --pad-x:32px;
}

/* ===================== reset / base ===================== */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:104px;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;background:var(--sand)}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--accent-hover)}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700;letter-spacing:-.015em;line-height:1.25}
p{margin:0 0 16px}
ul,ol{margin:0;padding:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.num{font-family:var(--font-num);letter-spacing:.02em;font-variant-numeric:tabular-nums}

/* ===================== 布局 ===================== */
.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 var(--pad-x);
}
.section{padding:104px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{max-width:760px;margin-bottom:48px}
.section-head .eyebrow{margin-bottom:14px}
.section-head h2{font-size:clamp(26px,3vw,38px);position:relative;padding-left:18px}
.section-head h2::before{content:"";position:absolute;left:0;top:.12em;width:4px;height:.86em;background:var(--brand);border-radius:2px}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--brand);background:var(--brand-light);
  padding:6px 14px;border-radius:var(--r-badge);
}
.eyebrow-accent{color:var(--accent-hover);background:var(--accent-light)}

/* ===================== 按钮 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:50px;padding:0 28px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;
  border:1.5px solid transparent;cursor:pointer;
  transition:background .25s var(--ease),transform .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease),box-shadow .25s var(--ease);
}
.btn svg{width:16px;height:16px;flex:0 0 auto}
.btn-sm{height:42px;padding:0 20px;font-size:14px}
.btn-lg{height:54px;padding:0 34px;font-size:16px}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px -16px rgba(232,90,30,.7)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{border-color:var(--brand);color:var(--brand);background:transparent}
.btn-outline:hover{background:var(--brand-light);color:var(--brand);transform:translateY(-1px)}
.btn-ghost{background:var(--surface);border-color:var(--border);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.link-more{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);
  position:relative;
}
.link-more::after{content:"";position:absolute;left:0;bottom:-3px;height:1.5px;width:0;background:var(--accent);transition:width .3s var(--ease)}
.link-more:hover::after{width:100%}
.link-more svg{width:15px;height:15px;transition:transform .25s var(--ease)}
.link-more:hover svg{transform:translateX(2px)}

/* ===================== 顶部信息条 ===================== */
.topbar{background:var(--brand-deep);color:#CFE0DF;font-size:13px}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:40px}
.topbar-tag{display:inline-flex;align-items:center;gap:8px}
.topbar-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);flex:0 0 auto}
.topbar-links{display:flex;align-items:center;gap:14px}
.topbar-links a{color:#CFE0DF}
.topbar-links a:hover{color:#fff}
.topbar-sep{width:1px;height:12px;background:rgba(255,255,255,.24)}

/* ===================== 头部与导航 ===================== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.94);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s var(--ease),border-color .25s var(--ease),background .25s var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--border);box-shadow:0 8px 24px -20px rgba(11,59,60,.5);background:rgba(246,244,239,.98)}
.header-inner{display:flex;align-items:center;gap:22px;min-height:78px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink)}
.brand-mark{width:40px;height:40px;flex:0 0 auto}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-text b{font-size:19px;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.logo-text small{font-family:var(--font-num);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}

.search-box{
  flex:1 1 auto;max-width:540px;min-width:220px;
  display:flex;align-items:center;gap:8px;
  height:48px;padding:0 6px 0 16px;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-pill);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.search-box:hover{border-color:#CFC9BC}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(11,59,60,.10)}
.search-ico{width:18px;height:18px;color:var(--muted);flex:0 0 auto}
.search-box input{
  flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;
  font-family:inherit;font-size:15px;color:var(--ink);outline:none;
}
.search-box input::placeholder{color:#9AA1A4}
.search-btn{
  width:36px;height:36px;flex:0 0 auto;border:0;border-radius:50%;
  background:var(--accent);color:#fff;display:grid;place-items:center;cursor:pointer;
  transition:background .25s var(--ease),transform .25s var(--ease);
}
.search-btn svg{width:16px;height:16px}
.search-btn:hover{background:var(--accent-hover);transform:scale(1.04)}
.search-btn:active{transform:scale(1)}

.main-nav{display:flex;align-items:center;gap:20px;margin-left:auto}
.nav-link{
  position:relative;font-size:15px;color:var(--text);padding:6px 0;white-space:nowrap;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--accent);
  transition:width .28s var(--ease);
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{width:100%}

.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--border);border-radius:12px;
  background:var(--surface);color:var(--ink);cursor:pointer;margin-left:auto;
  transition:border-color .25s var(--ease),color .25s var(--ease);
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.nav-toggle svg{width:20px;height:20px}

/* ===================== 移动端抽屉 ===================== */
.drawer{
  position:fixed;inset:0;z-index:90;background:rgba(7,42,43,.45);
  opacity:0;visibility:hidden;transition:opacity .28s var(--ease),visibility .28s var(--ease);
}
.drawer.is-open{opacity:1;visibility:visible}
.drawer-panel{
  position:absolute;top:0;right:0;width:min(360px,86vw);height:100%;
  background:var(--page);padding:22px 20px 32px;overflow-y:auto;
  transform:translateX(100%);transition:transform .32s var(--ease);
  display:flex;flex-direction:column;gap:20px;
}
.drawer.is-open .drawer-panel{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-title{font-size:18px;font-weight:800;color:var(--ink)}
.drawer-close{
  width:40px;height:40px;border:1px solid var(--border);border-radius:12px;background:var(--surface);
  color:var(--ink);cursor:pointer;display:grid;place-items:center;
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand)}
.drawer-close svg{width:18px;height:18px}
.search-box-mobile{max-width:none;min-width:0;width:100%}
.drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--border)}
.drawer-nav a{
  padding:14px 2px;font-size:16px;color:var(--ink);border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;
}
.drawer-nav a:hover{color:var(--brand)}
.drawer-nav a[aria-current="page"]{color:var(--accent-hover);font-weight:600}
.drawer-contact{font-size:14px;color:var(--muted);line-height:1.9}
.drawer-contact a{color:var(--brand);font-weight:600}

/* ===================== 面包屑 ===================== */
.breadcrumb{padding:26px 0 0}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:#C3BFB4}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .current{color:var(--ink);font-weight:600}

/* ===================== Hero ===================== */
.page-hero{padding:36px 0 88px}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.hero-copy h1{font-size:clamp(30px,3.6vw,48px);margin:18px 0 18px;letter-spacing:-.02em}
.hero-sub{font-size:17px;color:var(--text);max-width:520px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-points{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:18px;border-top:1px solid var(--border);padding-top:24px}
.hero-points li{font-size:13px;color:var(--muted);line-height:1.6}
.hero-points b{display:block;font-family:var(--font-num);font-size:26px;font-weight:700;color:var(--brand);letter-spacing:-.02em;margin-bottom:4px}
.hero-media{position:relative;margin:0}
.hero-media img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:20px;box-shadow:var(--sh-1)}
.float-badge{
  position:absolute;left:-18px;bottom:26px;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  padding:14px 18px;box-shadow:var(--sh-2);max-width:230px;
}
.float-badge .num{display:block;font-size:22px;font-weight:700;color:var(--accent-hover);line-height:1.2}
.float-badge span{font-size:13px;color:var(--muted)}

/* ===================== 分栏正文 + 粘性目录 ===================== */
.split-layout{display:grid;grid-template-columns:264px 1fr;gap:56px;align-items:start}
.toc{
  position:sticky;top:110px;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px 22px;box-shadow:var(--sh-1);
}
.toc-title{font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--muted);margin-bottom:14px}
.toc ol{list-style:none;display:grid;gap:2px;counter-reset:toc}
.toc li a{
  display:flex;gap:10px;align-items:baseline;
  padding:10px 0;font-size:15px;color:var(--text);
  border-bottom:1px solid var(--border);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.toc li:last-child a{border-bottom:0}
.toc li a::before{
  counter-increment:toc;content:"0" counter(toc);
  font-family:var(--font-num);font-size:12px;color:var(--muted);letter-spacing:.04em;
}
.toc li a:hover{color:var(--brand);padding-left:4px}
.toc li a.is-current{color:var(--brand);font-weight:600}
.toc li a.is-current::before{color:var(--accent-hover)}
.toc .btn{width:100%;margin-top:18px}
.toc-mobile{display:none;margin-bottom:28px}
.toc-mobile details{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;
}
.toc-mobile summary{
  list-style:none;cursor:pointer;padding:16px 20px;font-size:15px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;
}
.toc-mobile summary::-webkit-details-marker{display:none}
.toc-mobile summary svg{width:16px;height:16px;color:var(--muted);transition:transform .25s var(--ease)}
.toc-mobile details[open] summary svg{transform:rotate(180deg)}
.toc-mobile ol{list-style:none;padding:0 20px 16px;border-top:1px solid var(--border)}
.toc-mobile li a{display:block;padding:11px 0;font-size:15px;color:var(--text);border-bottom:1px dashed var(--border)}
.toc-mobile li:last-child a{border-bottom:0}

.detail-body{max-width:820px}
.detail-block{padding-bottom:44px;margin-bottom:44px;border-bottom:1px solid var(--border)}
.detail-block:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.detail-head{display:flex;align-items:flex-start;gap:18px;margin-bottom:20px}
.detail-num{
  font-family:var(--font-num);font-size:40px;font-weight:700;line-height:1;
  color:rgba(11,59,60,.20);flex:0 0 auto;letter-spacing:-.02em;
}
.detail-head h2{font-size:clamp(21px,2.3vw,28px);letter-spacing:-.02em}
.detail-block p{font-size:17px;line-height:1.85}
.detail-block .h3{font-size:18px;font-weight:600;color:var(--ink);margin:26px 0 10px}
.dot-list{list-style:none;display:grid;gap:10px;margin:0 0 20px}
.dot-list li{position:relative;padding-left:20px;font-size:16px;line-height:1.75;color:var(--text)}
.dot-list li::before{
  content:"";position:absolute;left:0;top:.66em;width:8px;height:8px;border-radius:2px;background:var(--brand);
}
.quote{
  border-left:3px solid var(--brand);background:var(--brand-light);
  border-radius:0 12px 12px 0;padding:18px 22px;margin:24px 0;font-size:16px;color:var(--brand-deep);
}
.detail-figure{margin:26px 0}
.detail-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img)}
.detail-figure figcaption{font-size:13px;color:var(--muted);margin-top:10px}

/* ===================== 参数表 ===================== */
.table-wrap{
  border:1px solid var(--border);border-radius:var(--r-card);background:var(--surface);
  overflow-x:auto;box-shadow:var(--sh-1);
}
.spec-table{width:100%;min-width:760px;border-collapse:collapse;font-size:15px}
.spec-table caption{
  caption-side:top;text-align:left;padding:20px 22px 4px;font-size:14px;color:var(--muted);
}
.spec-table thead th{
  background:var(--brand-light);color:var(--brand-deep);text-align:left;
  font-size:14px;font-weight:700;letter-spacing:.02em;padding:16px 20px;white-space:nowrap;
}
.spec-table tbody th{
  text-align:left;font-weight:600;color:var(--ink);padding:16px 20px;
  border-top:1px solid var(--border);white-space:nowrap;
}
.spec-table tbody td{
  padding:16px 20px;border-top:1px solid var(--border);color:var(--text);vertical-align:top;
}
.spec-table tbody tr:nth-child(even){background:#FAF9F5}
.spec-table tbody tr:hover{background:var(--brand-light)}
.table-note{font-size:13px;color:var(--muted);margin-top:14px}

/* ===================== FAQ ===================== */
.faq-list{max-width:920px;border-top:1px solid var(--border)}
.faq-item{border-bottom:1px solid var(--border)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:18px;
  padding:24px 4px;font-size:18px;font-weight:600;color:var(--ink);
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-index{
  font-family:var(--font-num);font-size:14px;color:var(--muted);flex:0 0 auto;letter-spacing:.04em;
}
.faq-item summary .faq-q-text{flex:1 1 auto}
.faq-arrow{width:18px;height:18px;flex:0 0 auto;color:var(--brand);transition:transform .28s var(--ease)}
.faq-item[open] .faq-arrow{transform:rotate(180deg)}
.faq-answer{padding:0 4px 26px 46px;font-size:16px;line-height:1.85;color:var(--text)}
.faq-answer p:last-child{margin-bottom:0}

/* ===================== CTA + 表单 ===================== */
.cta-band{
  position:relative;background:var(--brand-deep);color:#DCE8E7;border-radius:0;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  opacity:.14;
}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-120px;width:480px;height:480px;
  border:1.5px solid rgba(255,106,43,.35);border-radius:50%;
}
.cta-inner{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:56px;padding:88px 0;align-items:start}
.cta-copy h2{color:#fff;font-size:clamp(26px,3vw,36px);margin-bottom:16px}
.cta-copy p{color:#B9CFCE;font-size:16px;max-width:460px}
.cta-list{list-style:none;display:grid;gap:12px;margin-top:26px}
.cta-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:#CFE0DF}
.cta-list svg{width:18px;height:18px;flex:0 0 auto;color:var(--accent);margin-top:4px}
.cta-contact{margin-top:30px;font-size:15px;color:#CFE0DF}
.cta-contact a{color:#fff;font-weight:700;font-family:var(--font-num);letter-spacing:.02em}

.form-card{background:var(--surface);border-radius:20px;padding:30px 28px;box-shadow:var(--sh-2)}
.form-card h3{font-size:20px;margin-bottom:6px}
.form-card .form-hint{font-size:13px;color:var(--muted);margin-bottom:22px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px 18px}
.field{display:flex;flex-direction:column;gap:8px}
.field-full{grid-column:1 / -1}
.field label{font-size:14px;font-weight:600;color:var(--ink)}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;
  border:1px solid var(--border);border-radius:10px;background:#fff;
  font-family:inherit;font-size:15px;color:var(--ink);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea{height:auto;min-height:96px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(11,59,60,.12);
}
.field input:invalid:not(:placeholder-shown){border-color:#B45309}
.field-error{font-size:12px;color:#B45309;display:none}
.checkbox-row{grid-column:1 / -1;display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--muted)}
.checkbox-row input{width:16px;height:16px;margin-top:4px;flex:0 0 auto;accent-color:var(--brand)}
.checkbox-row a{color:var(--brand);text-decoration:underline}
.form-actions{grid-column:1 / -1;display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:4px}
.form-status{grid-column:1 / -1;display:none;border-radius:12px;padding:12px 16px;font-size:14px}
.form-status.is-success{display:block;background:#E8F3ED;color:var(--success);border:1px solid #C6E2D3}
.form-status.is-error{display:block;background:#FDF2E7;color:var(--warn);border:1px solid #F2DDC4}

/* ===================== 页脚 ===================== */
.site-footer{background:var(--brand-deep);color:#B8CCCB;font-size:14px;padding:76px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px;padding-bottom:52px}
.footer-brand .logo-text b{color:#fff;font-size:20px;font-weight:800}
.footer-brand .logo-text small{color:#7FA09E}
.footer-brand p{margin:18px 0 20px;max-width:340px;line-height:1.85;color:#9FB8B6}
.footer-contact{display:grid;gap:8px;font-size:13px;color:#9FB8B6}
.footer-contact a{color:#fff;font-weight:600;font-family:var(--font-num);letter-spacing:.02em}
.site-footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px}
.site-footer ul{list-style:none;display:grid;gap:11px}
.site-footer ul a{color:#B8CCCB}
.site-footer ul a:hover{color:var(--accent)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 30px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#87A3A1;
}

/* ===================== 动效 ===================== */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ===================== 响应式 ===================== */
@media (max-width:1279px){
  :root{--pad-x:24px}
  .section{padding:80px 0}
  .hero-grid{gap:40px}
  .split-layout{grid-template-columns:236px 1fr;gap:40px}
}
@media (max-width:1023px){
  :root{--pad-x:24px}
  .main-nav{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{flex-wrap:wrap;gap:12px;padding:12px 0;min-height:0}
  .brand{order:1}
  .nav-toggle{order:2}
  .search-box.search-desk{order:3;flex-basis:100%;max-width:none;min-width:0}
  .toc{display:none}
  .toc-mobile{display:block}
  .split-layout{grid-template-columns:1fr;gap:0}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-points{grid-template-columns:repeat(3,1fr)}
  .cta-inner{grid-template-columns:1fr;gap:36px;padding:72px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  :root{--pad-x:16px}
  html{scroll-padding-top:132px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .topbar-tag{font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .hero-points{grid-template-columns:1fr 1fr;gap:16px}
  .page-hero{padding:24px 0 56px}
  .hero-actions .btn{flex:1 1 auto;padding:0 20px}
  .float-badge{position:static;margin-top:14px;max-width:none;box-shadow:var(--sh-1)}
  .detail-head{gap:12px}
  .detail-num{font-size:30px}
  .detail-figure img{aspect-ratio:4/3}
  .form-grid{grid-template-columns:1fr}
  .form-card{padding:24px 20px}
  .faq-item summary{font-size:16px;gap:12px;padding:20px 2px}
  .faq-answer{padding:0 2px 22px 34px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:8px}
  .cta-inner{padding:56px 0}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
}