/* roulang page: index */
:root{
  --ink:#10141A;
  --ink-2:#1B2129;
  --paper:#FAFAF8;
  --brand:#12D6A8;
  --brand-deep:#0A9E7E;
  --accent:#FF5A3C;
  --muted:#5B6470;
  --line:rgba(16,20,26,.10);
  --line-strong:rgba(16,20,26,.18);
  --radius:16px;
  --radius-lg:20px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --shadow-card:0 1px 2px rgba(16,20,26,.04), 0 14px 30px -20px rgba(16,20,26,.30);
  --shadow-lift:0 1px 2px rgba(16,20,26,.05), 0 24px 44px -24px rgba(16,20,26,.38);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:0;background:none;color:inherit;}
ul{list-style:none;padding:0;}
::selection{background:rgba(18,214,168,.28);color:var(--ink);}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
.num{font-family:Inter,"SF Mono",ui-monospace,monospace;font-variant-numeric:tabular-nums;}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:768px){.container{padding-left:32px;padding-right:32px;}}
.narrow{max-width:820px;margin-left:auto;margin-right:auto;}

/* ---------- 入场动效 ---------- */
@keyframes riseIn{
  from{opacity:0;transform:translateY(12px);}
  to{opacity:1;transform:translateY(0);}
}
.rise{animation:riseIn 420ms var(--ease) both;}
@keyframes fadeIn{from{opacity:0;}to{opacity:1;}}
.fade{animation:fadeIn 520ms var(--ease) both;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(250,250,248,.86);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(250,250,248,.96);
  border-bottom-color:var(--line-strong);
  box-shadow:0 10px 30px -22px rgba(16,20,26,.45);
}
.nav-inner{display:flex;align-items:center;gap:20px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex-shrink:0;
  background:linear-gradient(140deg,var(--brand) 0%,var(--brand-deep) 100%);
  display:flex;align-items:center;justify-content:center;
  color:#06231C;font-weight:800;font-size:15px;letter-spacing:-.02em;
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;}
.nav-links{display:none;align-items:center;gap:4px;margin-left:14px;}
@media (min-width:900px){.nav-links{display:flex;}}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 14px;
  font-size:15px;font-weight:500;color:#2A3138;border-radius:10px;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--ink);background:rgba(16,20,26,.04);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--ink);font-weight:600;}
.nav-link.active::after{transform:scaleX(1);}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.nav-cta{display:none;}
@media (min-width:768px){.nav-cta{display:inline-flex;}}
.burger{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;
  align-items:center;
}
@media (min-width:900px){.burger{display:none;}}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .2s var(--ease),opacity .2s var(--ease);}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.drawer-mask{
  position:fixed;inset:0;background:rgba(16,20,26,.42);opacity:0;pointer-events:none;
  transition:opacity .24s var(--ease);z-index:70;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(88vw,360px);z-index:80;
  background:var(--paper);border-left:1px solid var(--line);
  padding:22px 20px 32px;display:flex;flex-direction:column;gap:20px;
  transform:translateX(102%);transition:transform .28s var(--ease);
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-links{display:flex;flex-direction:column;gap:6px;}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 14px;border-radius:12px;font-size:16px;font-weight:500;
  border:1px solid transparent;
}
.drawer-link:hover{background:#fff;border-color:var(--line);}
.drawer-link.active{background:#fff;border-color:var(--line);font-weight:700;}
.drawer-link .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);opacity:0;}
.drawer-link.active .dot{opacity:1;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:50px;padding:0 28px;border-radius:12px;
  font-size:15.5px;font-weight:600;line-height:1;white-space:nowrap;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-sm{height:42px;padding:0 20px;font-size:14.5px;border-radius:11px;}
.btn-primary{background:var(--brand);color:#06231C;box-shadow:0 12px 26px -16px rgba(18,214,168,.95);}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-1px);box-shadow:0 18px 34px -18px rgba(10,158,126,.85);}
.btn-primary:active{transform:translateY(0);box-shadow:0 8px 18px -14px rgba(10,158,126,.8);}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-light{background:#EDF1F0;color:var(--ink);}
.btn-light:hover{background:#fff;transform:translateY(-1px);}
.btn-block{width:100%;}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;
  border-radius:6px;font-size:12px;font-weight:600;line-height:1;letter-spacing:.01em;
}
.badge-brand{background:rgba(18,214,168,.16);color:#0A7A61;}
.badge-accent{background:rgba(255,90,60,.14);color:#C4371E;}
.badge-ink{background:rgba(16,20,26,.07);color:#3A424A;}
.badge-dark{background:rgba(18,214,168,.14);color:#5CE8C4;}

/* ---------- Hero ---------- */
.hero{padding:52px 0 60px;position:relative;overflow:hidden;}
@media (min-width:1024px){.hero{padding:76px 0 88px;}}
.hero-grid{display:grid;gap:40px;align-items:center;}
@media (min-width:1024px){.hero-grid{grid-template-columns:1.02fr .98fr;gap:56px;}}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 12px;
  border-radius:999px;border:1px solid rgba(18,214,168,.45);
  background:rgba(18,214,168,.10);color:#0A7A61;font-size:13px;font-weight:600;
}
.hero-title{
  font-size:clamp(34px,5.2vw,58px);
  line-height:1.12;font-weight:800;letter-spacing:-.01em;margin-top:18px;
}
.hero-title .line-2{display:block;color:#1F272E;}
.hero-sub{
  margin-top:20px;font-size:17px;line-height:1.8;color:var(--muted);max-width:34em;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);}
.hero-media img{width:100%;aspect-ratio:16/9;object-fit:cover;}
@media (max-width:1023px){.hero-media img{aspect-ratio:16/9;}}
.hero-media-tag{
  position:absolute;left:16px;bottom:16px;display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:10px;background:rgba(16,20,26,.78);color:#EDF1F0;
  font-size:13px;font-weight:600;backdrop-filter:blur(6px);
}
.hero-stats{
  margin-top:34px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px 24px;padding-top:24px;border-top:1px solid var(--line);
}
@media (min-width:640px){.hero-stats{grid-template-columns:repeat(4,minmax(0,1fr));}}
.hero-stat .v{font-size:26px;font-weight:700;color:var(--accent);line-height:1.2;}
.hero-stat .k{font-size:13px;color:var(--muted);line-height:1.6;margin-top:2px;}

/* ---------- 通用板块 ---------- */
.section{padding:64px 0;}
@media (min-width:1024px){.section{padding:88px 0;}}
.section-head{max-width:760px;}
.section-kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--brand-deep);letter-spacing:.06em;
}
.section-kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand);}
.section-title{font-size:clamp(26px,3.4vw,38px);line-height:1.2;font-weight:700;margin-top:14px;letter-spacing:-.01em;}
.section-desc{margin-top:14px;color:var(--muted);font-size:16px;line-height:1.85;max-width:38em;}

/* ---------- 权益对比表 ---------- */
.compare-wrap{
  margin-top:40px;overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-lg);
  background:#fff;box-shadow:var(--shadow-card);
  -webkit-overflow-scrolling:touch;
}
.compare-table{width:100%;min-width:880px;border-collapse:separate;border-spacing:0;}
.compare-table th,.compare-table td{padding:0 20px;text-align:left;vertical-align:middle;}
.compare-table thead th{
  background:#F2F5F3;height:64px;font-size:14px;font-weight:600;color:#333B42;
  border-bottom:1px solid var(--line-strong);white-space:nowrap;
}
.compare-table thead th:first-child{
  position:sticky;left:0;z-index:3;background:#F2F5F3;min-width:200px;
  font-size:14px;color:var(--muted);font-weight:600;
}
.compare-table tbody td{
  height:60px;font-size:15px;color:#252C33;border-bottom:1px solid var(--line);
}
.compare-table tbody td:first-child{
  position:sticky;left:0;z-index:2;background:#fff;font-weight:600;color:var(--ink);
  box-shadow:1px 0 0 var(--line);
}
.compare-table tbody tr:last-child td{border-bottom:0;}
.compare-table tbody tr:hover td{background:#FBFCFB;}
.compare-table tbody tr:hover td:first-child{background:#FBFCFB;}
.col-reco{background:#EAFBF6 !important;position:relative;}
td.col-reco,th.col-reco{background:#EAFBF6;}
thead th.col-reco{box-shadow:inset 0 3px 0 var(--brand);border-bottom-color:rgba(18,214,168,.35);}
.compare-table tbody tr:hover td.col-reco{background:#E3F8F2 !important;}
.plan-head{display:flex;flex-direction:column;gap:4px;padding:10px 0;}
.plan-name{font-size:16px;font-weight:700;color:var(--ink);display:flex;align-items:center;gap:8px;}
.plan-price{font-size:13px;color:var(--muted);font-weight:500;}
.plan-price b{font-size:19px;color:var(--accent);font-weight:700;margin-right:2px;}
.tick{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;background:rgba(18,214,168,.18);color:#0A7A61;font-size:12px;font-weight:700;}
.tick-off{display:inline-block;width:14px;height:2px;border-radius:2px;background:rgba(91,100,112,.5);}
.compare-sub{font-size:12.5px;color:var(--muted);}
.plan-cell{white-space:nowrap;}
.plan-action{padding:18px 20px 22px;}
.compare-note{margin-top:16px;font-size:13px;color:var(--muted);line-height:1.8;}

/* ---------- 等级亮点（深色） ---------- */
.dark-band{background:var(--ink);color:#EDF1F0;position:relative;overflow:hidden;}
.dark-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(237,241,240,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(237,241,240,.045) 1px,transparent 1px);
  background-size:56px 56px;
}
.dark-band .section-title{color:#F4F7F6;}
.dark-band .section-desc{color:rgba(237,241,240,.66);}
.level-list{margin-top:44px;position:relative;z-index:1;}
.level-item{
  display:grid;gap:16px;padding:30px 0;border-top:1px solid rgba(237,241,240,.14);
  transition:background-color .2s var(--ease),padding-left .2s var(--ease);
}
@media (min-width:768px){.level-item{grid-template-columns:150px 1fr;gap:24px;align-items:start;}}
.level-item:last-child{border-bottom:1px solid rgba(237,241,240,.14);}
.level-item:hover{background:rgba(18,214,168,.05);padding-left:12px;}
.level-num{
  font-family:Inter,"SF Mono",ui-monospace,monospace;font-variant-numeric:tabular-nums;
  font-size:clamp(38px,5vw,54px);line-height:1;font-weight:700;
  color:transparent;-webkit-text-stroke:1.4px rgba(18,214,168,.7);
  letter-spacing:-.02em;
}
.level-item:hover .level-num{color:var(--accent);-webkit-text-stroke:0;}
.level-body{max-width:560px;}
.level-body h3{font-size:20px;font-weight:700;color:#F4F7F6;line-height:1.4;}
.level-body p{margin-top:8px;font-size:15px;line-height:1.9;color:rgba(237,241,240,.66);}
.level-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.level-tags span{
  font-size:12px;font-weight:600;padding:4px 10px;border-radius:6px;
  border:1px solid rgba(18,214,168,.28);color:#7BEDD1;
}

/* ---------- 专属内容预览（不对称网格） ---------- */
.asym-grid{margin-top:42px;display:grid;gap:24px;grid-template-columns:1fr;}
@media (min-width:768px){.asym-grid{grid-template-columns:1fr 1fr;}}
@media (min-width:1024px){.asym-grid{grid-template-columns:1.25fr .95fr .95fr;}}
.content-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.content-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift);border-color:rgba(18,214,168,.42);}
.content-card .thumb{position:relative;overflow:hidden;}
.content-card .thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .32s var(--ease);}
.content-card:hover .thumb img{transform:scale(1.035);}
.content-card .thumb .badge{position:absolute;left:14px;top:14px;background:rgba(255,255,255,.94);color:#252C33;}
.content-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;gap:10px;}
.content-card h3{font-size:19px;line-height:1.4;font-weight:700;}
.content-card p{font-size:14.5px;line-height:1.85;color:var(--muted);}
.content-card .more{
  margin-top:auto;display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--brand-deep);
}
.content-card .more .arw{transition:transform .18s var(--ease);}
.content-card:hover .more .arw{transform:translateX(4px);}
.content-card.feature{grid-row:span 2;}
@media (max-width:767px){.content-card.feature{grid-row:auto;}}
.content-card.feature .thumb img{aspect-ratio:16/10;}
@media (min-width:1024px){.content-card.feature .thumb img{aspect-ratio:16/11;}}
.content-card.feature h3{font-size:22px;}
.small-list{display:grid;gap:24px;}

/* ---------- 数据 + 反馈 ---------- */
.proof-grid{margin-top:44px;display:grid;gap:28px;}
@media (min-width:1024px){.proof-grid{grid-template-columns:.85fr 1.15fr;gap:40px;}}
.proof-stats{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:28px;box-shadow:var(--shadow-card);display:grid;gap:22px;
}
.proof-stat{display:flex;align-items:baseline;gap:14px;padding-bottom:20px;border-bottom:1px solid var(--line);}
.proof-stat:last-child{padding-bottom:0;border-bottom:0;}
.proof-stat .v{font-size:32px;font-weight:700;color:var(--ink);line-height:1;min-width:96px;}
.proof-stat .v em{font-style:normal;font-size:16px;color:var(--accent);margin-left:2px;}
.proof-stat .k{font-size:14px;color:var(--muted);line-height:1.75;}
.quote-wrap{display:grid;gap:20px;}
.quote{
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);
  border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow-card);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.quote:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift);}
.quote p{font-size:15.5px;line-height:1.9;color:#252C33;}
.quote footer{margin-top:14px;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);}
.quote .who{width:30px;height:30px;border-radius:50%;background:rgba(18,214,168,.18);color:#0A7A61;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;}
.quote.accentline{border-left-color:var(--accent);}
.quote.accentline .who{background:rgba(255,90,60,.14);color:#C4371E;}

/* ---------- 最新信息（轻卡） ---------- */
.news-grid{margin-top:40px;display:grid;gap:20px;grid-template-columns:1fr;}
@media (min-width:640px){.news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.news-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}
.news-card{
  display:flex;flex-direction:column;gap:12px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:0 1px 2px rgba(16,20,26,.03);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.news-card:hover{transform:translateY(-3px);border-color:rgba(18,214,168,.42);box-shadow:var(--shadow-card);}
.news-top{display:flex;align-items:center;justify-content:space-between;gap:10px;}
.news-top time{font-size:12.5px;color:var(--muted);}
.news-card h3{font-size:17px;line-height:1.5;font-weight:700;}
.news-card p{font-size:14px;line-height:1.8;color:var(--muted);}
.news-more{margin-top:auto;font-size:13.5px;font-weight:600;color:var(--brand-deep);display:inline-flex;align-items:center;gap:6px;}
.news-card:hover .news-more .arw{transform:translateX(4px);}
.news-more .arw{transition:transform .18s var(--ease);}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.news-empty{
  margin-top:40px;border:1.5px dashed var(--line-strong);border-radius:var(--radius-lg);
  padding:52px 24px;text-align:center;background:#fff;
}
.news-empty .ico{
  width:52px;height:52px;margin:0 auto 16px;border-radius:14px;
  background:rgba(18,214,168,.14);color:#0A7A61;display:flex;align-items:center;justify-content:center;font-size:22px;
}
.news-empty p{color:var(--muted);font-size:15px;margin-bottom:20px;}

/* ---------- FAQ ---------- */
.faq-list{margin-top:36px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 4px;text-align:left;font-size:16.5px;font-weight:600;color:var(--ink);
  transition:color .18s var(--ease),padding-left .2s var(--ease);
}
.faq-q:hover{color:var(--brand-deep);padding-left:10px;}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:8px;border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;position:relative;
  transition:transform .24s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--ink);border-radius:2px;
  transition:transform .24s var(--ease),background-color .2s var(--ease),opacity .2s var(--ease);
}
.faq-icon::before{width:11px;height:2px;}
.faq-icon::after{width:2px;height:11px;}
.faq-item.is-open .faq-icon{background:var(--brand);border-color:var(--brand);transform:rotate(180deg);}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:#06231C;}
.faq-item.is-open .faq-icon::after{opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
.faq-a-inner{padding:0 44px 24px 4px;font-size:15.5px;line-height:1.85;color:var(--muted);}
.faq-a-inner .hl{color:var(--brand-deep);font-weight:600;}

/* ---------- CTA ---------- */
.cta-band{background:var(--ink);color:#EDF1F0;position:relative;overflow:hidden;}
.cta-band::before{
  content:"";position:absolute;right:-140px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,214,168,.22) 0%,rgba(18,214,168,0) 68%);
  pointer-events:none;
}
.cta-grid{position:relative;z-index:1;display:grid;gap:36px;padding:64px 0;}
@media (min-width:1024px){.cta-grid{grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:84px 0;}}
.cta-title{font-size:clamp(26px,3.2vw,36px);line-height:1.25;font-weight:700;color:#F4F7F6;}
.cta-points{margin-top:26px;display:grid;gap:14px;}
.cta-points li{display:flex;align-items:flex-start;gap:12px;font-size:15.5px;color:rgba(237,241,240,.82);line-height:1.7;}
.cta-points .ck{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;background:rgba(18,214,168,.18);
  color:#5CE8C4;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;margin-top:3px;
}
.cta-form-box{
  background:var(--ink-2);border:1px solid rgba(18,214,168,.22);border-radius:var(--radius-lg);
  padding:28px;
}
.cta-form-box .lb{font-size:14px;color:rgba(237,241,240,.72);margin-bottom:12px;}
.cta-form{display:grid;gap:12px;}
@media (min-width:640px){.cta-form{grid-template-columns:1fr auto;align-items:center;}}
.cta-input{
  height:48px;border-radius:12px;width:100%;
  background:#12171D;border:1px solid rgba(237,241,240,.18);
  color:#EDF1F0;padding:0 16px;font-size:15px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.cta-input::placeholder{color:rgba(237,241,240,.42);}
.cta-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(18,214,168,.18);}
.cta-tip{margin-top:14px;font-size:12px;line-height:1.7;color:rgba(237,241,240,.5);}
.cta-tip a{color:#5CE8C4;text-decoration:underline;text-underline-offset:3px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(237,241,240,.72);position:relative;}
.footer-grid{
  display:grid;gap:32px;padding:56px 0 40px;
  grid-template-columns:1fr;
}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.3fr .9fr .9fr 1.1fr;gap:40px;padding:68px 0 48px;}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{width:32px;height:32px;font-size:14px;}
.footer-brand span{font-size:16.5px;font-weight:700;color:#F4F7F6;}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(237,241,240,.62);max-width:26em;}
.footer-col h4{font-size:14px;font-weight:700;color:#F4F7F6;margin-bottom:14px;letter-spacing:.01em;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;line-height:2;color:rgba(237,241,240,.66);}
.footer-col a:hover{color:#5CE8C4;}
.footer-col li span{font-size:14px;line-height:2;color:rgba(237,241,240,.66);}
.footer-bottom{
  border-top:1px solid rgba(237,241,240,.14);padding:22px 0 30px;
  display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(237,241,240,.5);
}
.footer-bottom .site-id{font-family:Inter,"SF Mono",ui-monospace,monospace;letter-spacing:.02em;}

/* ---------- 长文排版 ---------- */
.prose-cn{font-size:16.5px;line-height:1.9;color:#252C33;}
.prose-cn p{margin-bottom:1.15em;}
.prose-cn h2{font-size:24px;font-weight:700;line-height:1.4;margin:1.8em 0 .8em;padding-left:14px;position:relative;}
.prose-cn h2::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:2px;background:var(--brand);}
.prose-cn h3{font-size:18.5px;font-weight:700;margin:1.5em 0 .6em;}
.prose-cn blockquote{
  margin:1.4em 0;padding:16px 20px;background:#F2F5F3;border-left:3px solid var(--brand);
  border-radius:0 12px 12px 0;color:#333B42;
}
.prose-cn ul,.prose-cn ol{padding-left:1.1em;margin-bottom:1.15em;}
.prose-cn ul li{list-style:none;position:relative;padding-left:16px;margin-bottom:8px;}
.prose-cn ul li::before{content:"";position:absolute;left:0;top:.75em;width:6px;height:6px;border-radius:50%;background:var(--brand);}
.prose-cn ol{counter-reset:li;}
.prose-cn ol li{list-style:none;position:relative;padding-left:26px;margin-bottom:8px;counter-increment:li;}
.prose-cn ol li::before{content:counter(li)".";position:absolute;left:0;top:0;font-weight:600;color:var(--brand-deep);font-family:Inter,ui-monospace,monospace;}

/* 滚动条 */
::-webkit-scrollbar{height:10px;width:10px;}
::-webkit-scrollbar-track{background:rgba(16,20,26,.04);}
::-webkit-scrollbar-thumb{background:rgba(16,20,26,.18);border-radius:8px;}
::-webkit-scrollbar-thumb:hover{background:rgba(16,20,26,.3);}

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

/* roulang page: article */
:root{
  --ink:#10141A;
  --ink-2:#1B2129;
  --paper:#FAFAF8;
  --brand:#12D6A8;
  --brand-deep:#0A9E7E;
  --accent:#FF5A3C;
  --muted:#5B6470;
  --line:rgba(16,20,26,.10);
  --radius:16px;
  --radius-lg:20px;
  --shadow-card:0 1px 2px rgba(16,20,26,.04), 0 14px 30px -20px rgba(16,20,26,.30);
  --shadow-lift:0 1px 2px rgba(16,20,26,.05), 0 26px 46px -24px rgba(16,20,26,.42);
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::selection{background:rgba(18,214,168,.26)}
.num{font-family:"Inter","SF Mono",ui-monospace,monospace;font-variant-numeric:tabular-nums;letter-spacing:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.narrow{max-width:820px}
.section{padding:72px 0}
.section-tight{padding:56px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.06em;
  color:var(--brand-deep);background:rgba(18,214,168,.12);
  border:1px solid rgba(18,214,168,.26);
  padding:5px 12px;border-radius:999px;
}
.h2{font-size:clamp(26px,3.4vw,38px);line-height:1.2;font-weight:750;letter-spacing:-.01em}
.lead{color:var(--muted);font-size:15.5px;line-height:1.85}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(250,250,248,.88);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(250,250,248,.97);
  border-bottom-color:var(--line);
  box-shadow:0 12px 30px -24px rgba(16,20,26,.5);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand);color:var(--ink);
  display:grid;place-items:center;font-weight:800;font-size:17px;line-height:1;
  box-shadow:0 10px 20px -14px rgba(18,214,168,.95);
}
.brand-text{font-weight:800;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:30px;margin-left:auto}
.nav-link{position:relative;font-size:15px;font-weight:500;color:#2A3138;padding:6px 0;transition:color .18s var(--ease);white-space:nowrap}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink);font-weight:700}
.nav-link.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:50px;padding:0 28px;border-radius:12px;
  font-size:15px;font-weight:600;white-space:nowrap;
  border:1.5px solid transparent;
  transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{background:var(--brand);color:var(--ink);box-shadow:0 14px 26px -18px rgba(18,214,168,.95)}
.btn-primary:hover{background:var(--brand-deep);color:#04140F;transform:translateY(-1px);box-shadow:0 20px 32px -18px rgba(10,158,126,.8)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:42px;padding:0 18px;font-size:14px;border-radius:10px}
.btn-lg{height:52px;padding:0 30px}
.btn-block{width:100%}
.burger{
  display:none;width:42px;height:42px;border-radius:10px;
  border:1px solid var(--line);background:#fff;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.burger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(88vw,340px);z-index:80;
  background:var(--paper);border-left:1px solid var(--line);
  box-shadow:-24px 0 60px -30px rgba(16,20,26,.6);
  transform:translateX(100%);transition:transform .28s var(--ease);
  padding:20px;display:flex;flex-direction:column;gap:16px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer .drawer-title{font-size:13px;font-weight:700;color:var(--muted)}
.drawer a.drawer-link{
  display:block;padding:13px 14px;border-radius:12px;border:1px solid var(--line);
  background:#fff;font-size:15px;font-weight:600;
}
.drawer a.drawer-link:hover{border-color:rgba(18,214,168,.5);background:rgba(18,214,168,.08)}
.drawer a.drawer-link.active{border-color:var(--brand);background:rgba(18,214,168,.12)}
.scrim{
  position:fixed;inset:0;background:rgba(16,20,26,.42);z-index:70;
  opacity:0;pointer-events:none;transition:opacity .24s var(--ease);
}
.scrim.is-open{opacity:1;pointer-events:auto}

/* ---------- page head ---------- */
.page-head{padding:36px 0 8px;border-bottom:1px solid var(--line);background:
  linear-gradient(180deg,rgba(18,214,168,.06),rgba(250,250,248,0) 70%);}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand-deep)}
.crumb .sep{opacity:.55}
.crumb .now{color:#8A929C;max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-title{
  font-size:clamp(28px,3.9vw,44px);line-height:1.22;font-weight:800;letter-spacing:-.015em;
  margin:22px 0 18px;max-width:26ch;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;padding-bottom:26px;font-size:13.5px;color:var(--muted)}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;border-radius:6px;
  font-size:12px;font-weight:600;line-height:1;
}
.badge-brand{background:rgba(18,214,168,.14);color:#078469}
.badge-accent{background:rgba(255,90,60,.13);color:#C73318}
.badge-ink{background:rgba(16,20,26,.07);color:#2A3138}
.meta-dot{width:4px;height:4px;border-radius:50%;background:rgba(16,20,26,.22);display:inline-block}
.meta-num{font-family:"Inter","SF Mono",ui-monospace,monospace;font-variant-numeric:tabular-nums}

/* ---------- layout ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 316px;gap:56px;padding:48px 0 8px;align-items:start}
.article-main{min-width:0}

/* ---------- prose ---------- */
.prose-cn{font-size:16.5px;line-height:1.92;color:#1B2129;max-width:800px}
.prose-cn > * + *{margin-top:1.15em}
.prose-cn h2{
  position:relative;font-size:clamp(21px,2.4vw,26px);line-height:1.35;font-weight:750;
  margin:2.1em 0 .7em;padding-top:22px;letter-spacing:-.01em;
}
.prose-cn h2::before{
  content:"";position:absolute;top:0;left:0;width:40px;height:3px;border-radius:2px;background:var(--brand);
}
.prose-cn h3{font-size:19px;line-height:1.45;font-weight:700;margin:1.7em 0 .55em}
.prose-cn p{color:#232A32}
.prose-cn a{color:var(--brand-deep);font-weight:600;border-bottom:1px solid rgba(10,158,126,.35)}
.prose-cn a:hover{border-bottom-color:var(--brand-deep);background:rgba(18,214,168,.1)}
.prose-cn strong{font-weight:750;color:var(--ink)}
.prose-cn ul,.prose-cn ol{padding-left:1.35em}
.prose-cn li{margin:.45em 0}
.prose-cn ul li::marker{color:var(--brand-deep)}
.prose-cn ol li::marker{color:var(--accent);font-weight:700}
.prose-cn blockquote{
  margin:1.6em 0;padding:18px 20px;background:#F2F5F3;border-left:3px solid var(--brand);
  border-radius:0 12px 12px 0;color:#3A424B;font-size:15.5px;
}
.prose-cn blockquote p{margin:0;color:#3A424B}
.prose-cn img{border-radius:12px;margin:1.6em auto;box-shadow:var(--shadow-card)}
.prose-cn figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
.prose-cn table{
  width:100%;border-collapse:collapse;display:block;overflow-x:auto;margin:1.6em 0;
  font-size:15px;border:1px solid var(--line);border-radius:12px;
}
.prose-cn th,.prose-cn td{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left;white-space:nowrap}
.prose-cn th{background:#F2F5F3;font-weight:700}
.prose-cn code{
  font-family:"SF Mono",ui-monospace,monospace;font-size:14px;background:#F2F5F3;
  padding:2px 6px;border-radius:6px;color:#0A6B57;
}
.prose-cn pre{
  background:var(--ink);color:#EDF1F0;padding:18px;border-radius:12px;overflow-x:auto;font-size:14px;
}
.prose-cn pre code{background:none;color:inherit;padding:0}
.prose-cn hr{border:0;border-top:1px solid var(--line);margin:2em 0}

/* ---------- aside ---------- */
.article-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px}
.side-card{
  border:1px solid var(--line);border-radius:var(--radius);background:#fff;
  box-shadow:var(--shadow-card);padding:20px;
}
.side-title{font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.02em;margin-bottom:12px}
.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;font-size:14px;color:#3A424B;padding:7px 10px;border-radius:8px;
  border-left:2px solid transparent;line-height:1.6;transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.toc-list a:hover{background:rgba(18,214,168,.1);border-left-color:var(--brand);color:var(--ink)}
.side-cta{
  background:var(--ink);border:1px solid rgba(18,214,168,.28);border-radius:var(--radius);
  padding:22px;color:#EDF1F0;
}
.side-cta h3{font-size:17px;font-weight:750;color:#EDF1F0;line-height:1.4}
.side-cta p{font-size:13.5px;color:rgba(237,241,240,.68);margin-top:8px;line-height:1.75}
.side-cta .btn{margin-top:16px}
.side-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}
.side-list li{padding-bottom:12px;border-bottom:1px dashed var(--line)}
.side-list li:last-child{border-bottom:0;padding-bottom:0}
.side-list a{font-size:14.5px;font-weight:600;line-height:1.55;display:block}
.side-list a:hover{color:var(--brand-deep)}
.side-list .sm{font-size:12px;color:var(--muted);margin-top:5px;display:flex;gap:10px}

/* ---------- related ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.rel-card{
  border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:20px;
  display:flex;flex-direction:column;gap:10px;box-shadow:var(--shadow-card);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(18,214,168,.42);box-shadow:var(--shadow-lift)}
.rel-card .rel-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.rel-card h3{font-size:17px;font-weight:700;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-card p{font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-card .rel-foot{display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--muted);margin-top:auto}
.arrow-move{transition:transform .18s var(--ease);color:var(--accent);font-weight:700}
.rel-card:hover .arrow-move{transform:translateX(4px)}

/* ---------- prevnext ---------- */
.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:28px}
.pn-item{
  border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:18px 20px;
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.pn-item:hover{transform:translateY(-3px);border-color:rgba(18,214,168,.42);box-shadow:var(--shadow-card)}
.pn-item .pn-label{font-size:12px;font-weight:700;color:var(--muted)}
.pn-item .pn-title{font-size:15.5px;font-weight:600;margin-top:6px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pn-item.next{text-align:right}

/* ---------- cta ---------- */
.cta-wrap{
  background:var(--ink);color:#EDF1F0;border-radius:var(--radius-lg);
  padding:48px;display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-wrap::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(18,214,168,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(18,214,168,.06) 1px,transparent 1px);
  background-size:44px 44px;opacity:.85;
}
.cta-wrap > *{position:relative;z-index:1}
.cta-wrap h2{font-size:clamp(24px,2.9vw,34px);line-height:1.25;font-weight:800;color:#EDF1F0;letter-spacing:-.01em}
.cta-wrap .cta-sub{color:rgba(237,241,240,.68);font-size:15px;margin-top:12px;line-height:1.8}
.cta-points{list-style:none;margin:22px 0 0;padding:0;display:flex;flex-direction:column;gap:11px}
.cta-points li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:rgba(237,241,240,.9)}
.cta-points .tick{
  flex:0 0 auto;width:20px;height:20px;border-radius:6px;background:rgba(18,214,168,.18);
  color:var(--brand);display:grid;place-items:center;font-size:12px;font-weight:800;margin-top:4px;
}
.cta-form{display:flex;gap:12px}
.cta-form input{
  flex:1 1 auto;height:50px;border-radius:12px;padding:0 16px;
  background:#1B2129;border:1px solid rgba(237,241,240,.18);color:#EDF1F0;font-size:15px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.cta-form input::placeholder{color:rgba(237,241,240,.42)}
.cta-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(18,214,168,.2)}
.form-note{font-size:12px;color:rgba(237,241,240,.5);margin-top:12px;line-height:1.7}
.form-tip{font-size:13px;color:var(--brand);margin-top:10px;min-height:18px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#EDF1F0;margin-top:80px;padding:64px 0 0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand .brand-mark{background:var(--brand)}
.foot-brand .brand-text{color:#EDF1F0}
.foot-desc{font-size:14px;color:rgba(237,241,240,.62);line-height:1.85;max-width:32ch}
.foot-col h3{font-size:13px;font-weight:700;color:rgba(237,241,240,.72);margin-bottom:14px}
.foot-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.foot-col a{font-size:14px;color:rgba(237,241,240,.82);line-height:2}
.foot-col a:hover{color:var(--brand)}
.foot-col p{font-size:14px;color:rgba(237,241,240,.72);line-height:2}
.foot-col p .mono{font-family:"Inter","SF Mono",ui-monospace,monospace;color:rgba(237,241,240,.9)}
.foot-bottom{
  margin-top:48px;padding:22px 0;border-top:1px solid rgba(237,241,240,.14);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:12.5px;color:rgba(237,241,240,.5);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px)}
.reveal.is-in{opacity:1;transform:none;transition:opacity .42s var(--ease),transform .42s var(--ease)}

/* ---------- empty ---------- */
.empty-box{
  border:1px dashed rgba(16,20,26,.22);border-radius:var(--radius);background:#fff;
  padding:48px 24px;text-align:center;
}
.empty-box .ico{
  width:52px;height:52px;border-radius:14px;background:rgba(18,214,168,.14);color:var(--brand-deep);
  display:grid;place-items:center;margin:0 auto 16px;font-size:22px;font-weight:800;
}
.empty-box h3{font-size:19px;font-weight:750}
.empty-box p{font-size:14.5px;color:var(--muted);margin-top:8px}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:36px}
  .article-side{position:static;top:auto}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-wrap{grid-template-columns:1fr;gap:28px;padding:36px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:52px 0}
  .section-tight{padding:40px 0}
  .nav-links{display:none}
  .burger{display:flex}
  .nav-inner{height:64px}
  .brand-text{font-size:16px}
  .brand-mark{width:30px;height:30px;font-size:15px;border-radius:9px}
  .nav-cta{display:none}
  .page-head{padding:24px 0 4px}
  .article-title{max-width:none}
  .related-grid{grid-template-columns:1fr}
  .prevnext{grid-template-columns:1fr}
  .pn-item.next{text-align:left}
  .cta-wrap{padding:28px 20px;border-radius:var(--radius)}
  .cta-form{flex-direction:column}
  .cta-form .btn{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{padding-top:48px;margin-top:56px}
  .prose-cn{font-size:16px;line-height:1.9}
}
@media (max-width:520px){
  .article-title{font-size:26px}
  .btn-lg{padding:0 22px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --ink:#10141A;
  --ink-2:#1B2129;
  --paper:#FAFAF8;
  --surface:#FFFFFF;
  --brand:#12D6A8;
  --brand-deep:#0A9E7E;
  --brand-soft:#EAFBF6;
  --accent:#FF5A3C;
  --muted:#5B6470;
  --line:rgba(16,20,26,.10);
  --line-strong:rgba(16,20,26,.16);
  --r-sm:6px;
  --r:12px;
  --r-md:16px;
  --r-lg:20px;
  --shadow-1:0 1px 2px rgba(16,20,26,.04);
  --shadow-2:0 1px 2px rgba(16,20,26,.04), 0 14px 30px -20px rgba(16,20,26,.30);
  --shadow-3:0 1px 2px rgba(16,20,26,.05), 0 22px 40px -22px rgba(16,20,26,.38);
  --ease:cubic-bezier(.2,.7,.2,1);
  --mono:"Inter","SF Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input{font:inherit}
button{cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container{padding:0 32px}}

/* 导航 */
.site-header{position:sticky;top:0;z-index:60;background:rgba(250,250,248,.88);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:box-shadow .3s var(--ease),background .3s var(--ease)}
.site-header.is-scrolled{background:rgba(250,250,248,.97);box-shadow:0 10px 26px -20px rgba(16,20,26,.42)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--ink);color:var(--brand);display:grid;place-items:center;font-weight:800;font-size:17px;line-height:1}
.brand-text{font-weight:800;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-link{position:relative;font-size:15px;font-weight:500;color:#3E4753;padding:6px 0;transition:color .18s var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease)}
.nav-link:hover,.nav-link:focus-visible{color:var(--ink)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:var(--r);font-size:15px;font-weight:600;white-space:nowrap;transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease)}
.btn-primary{background:var(--brand);color:var(--ink);box-shadow:0 10px 24px -16px rgba(18,214,168,.95)}
.btn-primary:hover{background:var(--brand-deep);color:#051A14;transform:translateY(-1px);box-shadow:0 16px 30px -16px rgba(10,158,126,.8)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 16px -14px rgba(10,158,126,.8)}
.btn-ghost{border:1.5px solid var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.btn-lg{height:52px;padding:0 30px;font-size:16px}
.btn-block{width:100%}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.burger{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;flex-direction:column;align-items:center;justify-content:center;gap:4px;transition:background .18s var(--ease),border-color .18s var(--ease)}
.burger:hover{background:#fff;border-color:var(--line-strong)}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink)}

/* 移动抽屉 */
.drawer-mask{position:fixed;inset:0;background:rgba(16,20,26,.45);z-index:70;opacity:0;pointer-events:none;transition:opacity .3s var(--ease)}
.drawer-mask.open{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);z-index:80;background:var(--paper);padding:22px 20px 28px;display:flex;flex-direction:column;gap:18px;transform:translateX(100%);transition:transform .3s var(--ease);box-shadow:-24px 0 44px -26px rgba(16,20,26,.45)}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);font-size:20px;line-height:1;display:grid;place-items:center;background:#fff}
.drawer-close:hover{border-color:var(--line-strong)}
.drawer-links{display:flex;flex-direction:column;gap:4px;margin-top:4px}
.drawer-link{padding:12px 12px;border-radius:10px;font-size:15.5px;font-weight:500;color:#3E4753;border:1px solid transparent;transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease)}
.drawer-link:hover{background:#fff;border-color:var(--line)}
.drawer-link.active{background:var(--brand-soft);color:#086651;font-weight:600;border-color:rgba(18,214,168,.42)}
.drawer-note{margin-top:auto;font-size:12.5px;line-height:1.7;color:var(--muted)}

/* Hero */
.cat-hero{position:relative;min-height:44vh;display:flex;align-items:center;padding:62px 0 54px;border-bottom:1px solid var(--line);background-image:linear-gradient(180deg,rgba(250,250,248,.93),rgba(250,250,248,.985)),url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center}
.cat-hero .container{width:100%}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:20px;flex-wrap:wrap}
.crumb a{color:var(--muted);transition:color .18s var(--ease)}
.crumb a:hover{color:var(--brand-deep)}
.crumb-cur{color:#8A929C}
.crumb-sep{color:#C3C9CE}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(280px,.85fr);gap:40px;align-items:center}
.pill{display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:8px;background:var(--brand-soft);color:#086651;font-size:12.5px;font-weight:700;border:1px solid rgba(18,214,168,.36)}
.hero-title{font-size:clamp(30px,4.4vw,46px);line-height:1.16;font-weight:800;letter-spacing:-.01em;margin-top:16px}
.hero-desc{margin-top:14px;font-size:16.5px;line-height:1.8;color:#3E4753;max-width:660px}
.tagbar{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.tag{display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;font-size:13px;font-weight:600;background:#fff;border:1px solid var(--line);color:#3E4753;transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease)}
.tag:hover{border-color:rgba(18,214,168,.5);color:#086651}
.tag.is-on{background:var(--brand-soft);border-color:rgba(18,214,168,.45);color:#086651}
.fact-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-2);padding:22px 22px 18px}
.fact-card h2{font-size:15px;font-weight:700;letter-spacing:0}
.fact-list{margin-top:14px;border-top:1px solid var(--line)}
.fact-item{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:13px 0;border-bottom:1px solid var(--line)}
.fact-item:last-child{border-bottom:0}
.fact-num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:20px;font-weight:700;color:var(--accent);letter-spacing:-.02em}
.fact-label{font-size:13.5px;color:var(--muted)}

/* 通用板块 */
.section{padding:76px 0}
.section-tight{padding:56px 0}
.section-head{max-width:780px;margin-bottom:34px}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--brand-deep)}
.kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand)}
.h2{font-size:clamp(26px,3.4vw,38px);line-height:1.2;font-weight:750;letter-spacing:-.01em;margin-top:12px}
.section-sub{margin-top:12px;font-size:15.5px;line-height:1.85;color:var(--muted)}
.divider-node{height:1px;background:var(--line)}

/* 权益清单 */
.spec-list{border-top:1px solid var(--line-strong)}
.spec-row{display:grid;grid-template-columns:58px minmax(0,1fr) 46px;gap:22px;align-items:center;padding:24px 14px 24px 20px;border-bottom:1px solid var(--line);position:relative;background:transparent;transition:background .18s var(--ease)}
.spec-row::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;background:var(--brand);transform:scaleY(0);transform-origin:top;transition:transform .2s var(--ease)}
.spec-row:hover{background:#fff}
.spec-row:hover::before{transform:scaleY(1)}
.spec-idx{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:18px;font-weight:700;color:var(--accent);letter-spacing:-.02em}
.spec-title{font-size:19px;font-weight:700;line-height:1.4}
.spec-desc{margin-top:6px;font-size:14.5px;line-height:1.78;color:var(--muted);max-width:760px}
.spec-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.mini-tag{display:inline-flex;align-items:center;height:24px;padding:0 9px;border-radius:6px;font-size:12px;font-weight:600}
.mini-brand{background:var(--brand-soft);color:#086651}
.mini-accent{background:#FFEDE8;color:#B93318}
.mini-ink{background:rgba(16,20,26,.06);color:#3E4753}
.spec-arrow{width:42px;height:42px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;color:var(--ink);font-size:16px;transition:transform .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease)}
.spec-row:hover .spec-arrow{transform:translateX(4px);background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* 深色流程 */
.dark-band{background:var(--ink);color:#EDF1F0}
.dark-band .kicker{color:var(--brand)}
.dark-band .section-sub{color:rgba(237,241,240,.66)}
.dark-band .h2{color:#fff}
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:8px}
.step{position:relative;background:var(--ink-2);border:1px solid rgba(18,214,168,.22);border-radius:var(--r-md);padding:22px 20px 20px;transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease)}
.step:hover{transform:translateY(-4px);border-color:rgba(18,214,168,.5);box-shadow:0 22px 40px -26px rgba(0,0,0,.75)}
.step-num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:14px;font-weight:700;color:var(--brand);letter-spacing:.08em}
.step h3{margin-top:12px;font-size:17.5px;font-weight:700;color:#fff;line-height:1.4}
.step p{margin-top:8px;font-size:13.8px;line-height:1.75;color:rgba(237,241,240,.66)}

/* 场景图文（不对称网格） */
.feature-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:24px}
.feature-card{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-2);transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);display:flex;flex-direction:column}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3);border-color:rgba(18,214,168,.35)}
.feature-media{position:relative;overflow:hidden;background:#EFEFEC}
.feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.feature-card:hover .feature-media img{transform:scale(1.03)}
.feature-large .feature-media{aspect-ratio:16/9}
.feature-small .feature-media{aspect-ratio:16/10}
.feature-body{padding:20px 22px 22px}
.corner-badge{position:absolute;top:14px;left:14px;display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:6px;background:rgba(16,20,26,.86);color:var(--brand);font-size:12px;font-weight:700}
.feature-title{font-size:20px;font-weight:700;line-height:1.4}
.feature-text{margin-top:8px;font-size:14.5px;line-height:1.8;color:var(--muted)}
.feature-meta{display:flex;align-items:center;gap:10px;margin-top:16px;font-size:12.5px;color:var(--muted)}
.feature-meta .num{color:var(--ink);font-weight:600}

/* 会员声音 */
.quote-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.quote{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:22px 20px;box-shadow:var(--shadow-1);transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease)}
.quote:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(18,214,168,.35)}
.quote-text{font-size:14.8px;line-height:1.85;color:#3E4753}
.quote-foot{display:flex;align-items:center;gap:10px;margin-top:16px;padding-top:14px;border-top:1px solid var(--line)}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--brand-soft);color:#086651;display:grid;place-items:center;font-weight:700;font-size:14px}
.quote-who{font-size:13.5px;font-weight:600}
.quote-role{font-size:12.5px;color:var(--muted)}

/* FAQ */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);margin-bottom:12px;overflow:hidden;transition:border-color .18s var(--ease),box-shadow .18s var(--ease)}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item[open]{border-color:rgba(18,214,168,.45);box-shadow:var(--shadow-1)}
.faq-q{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 20px;font-size:16.5px;font-weight:600;line-height:1.6;cursor:pointer}
.faq-q::-webkit-details-marker{display:none}
.faq-sign{position:relative;width:18px;height:18px;flex-shrink:0}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;background:var(--ink);border-radius:2px;transition:transform .22s var(--ease),opacity .22s var(--ease)}
.faq-sign::before{left:0;right:0;top:8px;height:2px}
.faq-sign::after{top:0;bottom:0;left:8px;width:2px}
.faq-item[open] .faq-sign::after{transform:scaleY(0);opacity:0}
.faq-item[open] .faq-sign::before{background:var(--brand-deep)}
.faq-a{padding:0 20px 20px;font-size:15.5px;line-height:1.88;color:#3E4753}

/* CTA */
.cta-band{background:var(--ink);color:#EDF1F0;padding:44px 0;border-top:1px solid rgba(18,214,168,.18)}
.cta-inner{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:36px;align-items:center}
.cta-title{font-size:clamp(22px,2.6vw,30px);font-weight:750;line-height:1.25;color:#fff}
.cta-points{display:flex;flex-wrap:wrap;gap:12px 22px;margin-top:16px}
.cta-points li{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(237,241,240,.82)}
.cta-points li::before{content:"";width:16px;height:16px;border-radius:50%;background:rgba(18,214,168,.16);border:1px solid rgba(18,214,168,.55);flex-shrink:0}
.cta-form{display:flex;gap:12px;align-items:center}
.cta-input{flex:1;min-width:0;height:48px;padding:0 16px;border-radius:var(--r);background:#1B2129;border:1px solid rgba(237,241,240,.18);color:#EDF1F0;font-size:15px;transition:border-color .18s var(--ease),box-shadow .18s var(--ease)}
.cta-input::placeholder{color:rgba(237,241,240,.42)}
.cta-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(18,214,168,.22)}
.form-note{margin-top:12px;font-size:12px;line-height:1.7;color:rgba(237,241,240,.5)}
.form-note.is-ok{color:var(--brand)}

/* 页脚 */
.site-footer{background:var(--ink);color:rgba(237,241,240,.72);padding:56px 0 26px;border-top:1px solid rgba(237,241,240,.08)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
.brand-footer .brand-mark{background:rgba(18,214,168,.16);color:var(--brand)}
.brand-footer .brand-text{color:#fff}
.footer-desc{margin-top:14px;font-size:13.5px;line-height:1.85;max-width:300px;color:rgba(237,241,240,.6)}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-col a,.footer-col p{display:block;font-size:13.8px;line-height:2;color:rgba(237,241,240,.66);transition:color .18s var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{margin-top:40px;padding-top:20px;border-top:1px solid rgba(237,241,240,.12);display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:12.8px;color:rgba(237,241,240,.5)}
.footer-bottom .num{color:rgba(237,241,240,.62)}

/* 动效 */
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.fade-up{animation:fadeUp .42s var(--ease) both}
.d1{animation-delay:.06s}
.d2{animation-delay:.12s}
.d3{animation-delay:.18s}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* 响应式 */
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .burger{display:flex}
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .fact-card{max-width:520px}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .feature-grid{grid-template-columns:1fr}
  .quote-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-inner{grid-template-columns:1fr;gap:24px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .site-header{backdrop-filter:none;-webkit-backdrop-filter:none;background:rgba(250,250,248,.98)}
  .section{padding:52px 0}
  .section-tight{padding:44px 0}
  .cat-hero{padding:44px 0 40px;min-height:0}
  .spec-row{grid-template-columns:38px minmax(0,1fr) 34px;gap:12px;padding:20px 6px 20px 12px}
  .spec-idx{font-size:16px}
  .spec-title{font-size:17.5px}
  .spec-arrow{width:34px;height:34px;font-size:14px}
  .steps{grid-template-columns:1fr}
  .quote-grid{grid-template-columns:1fr}
  .cta-form{flex-direction:column;align-items:stretch}
  .cta-form .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:520px){
  .brand-text{font-size:15.5px}
  .brand-mark{width:30px;height:30px;font-size:15px}
  .nav-inner{height:64px;gap:12px}
  .hero-title{font-size:28px;line-height:1.22}
  .hero-desc{font-size:15.5px}
  .h2{font-size:25px}
  .faq-q{font-size:15.5px;padding:16px 16px}
  .faq-a{padding:0 16px 18px;font-size:15px}
  .fact-card{padding:18px}
}

/* roulang page: category2 */
:root{
    --ink:#10141A;
    --ink-2:#1B2129;
    --paper:#FAFAF8;
    --brand:#12D6A8;
    --brand-deep:#0A9E7E;
    --accent:#FF5A3C;
    --muted:#5B6470;
    --line:rgba(16,20,26,.10);
    --line-strong:rgba(16,20,26,.16);
    --radius:16px;
    --radius-lg:20px;
    --shadow-sm:0 1px 2px rgba(16,20,26,.04);
    --shadow-md:0 1px 2px rgba(16,20,26,.04), 0 14px 30px -20px rgba(16,20,26,.30);
    --shadow-lg:0 2px 4px rgba(16,20,26,.06), 0 22px 40px -22px rgba(16,20,26,.38);
    --ease:cubic-bezier(.2,.7,.2,1);
    --num-font:"Inter","SF Mono",ui-monospace,Menlo,Consolas,monospace;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.85;
    letter-spacing:0;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-style:none;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  input{font-family:inherit;font-size:inherit;}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
  ul,ol{list-style:none;}
  ::selection{background:rgba(18,214,168,.32);color:var(--ink);}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:8px;}
  ::-webkit-scrollbar{width:10px;height:10px;}
  ::-webkit-scrollbar-thumb{background:rgba(16,20,26,.22);border-radius:99px;}
  ::-webkit-scrollbar-track{background:rgba(16,20,26,.05);}

  .num{font-family:var(--num-font);font-variant-numeric:tabular-nums;letter-spacing:0;}

  .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 20px;
  }
  @media (min-width:768px){ .container{padding:0 32px;} }

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(250,250,248,.88);
    backdrop-filter:saturate(150%) blur(10px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
  }
  .site-header.is-scrolled{
    background:rgba(250,250,248,.97);
    border-color:var(--line-strong);
    box-shadow:0 10px 26px -22px rgba(16,20,26,.55);
  }
  .nav-inner{
    display:flex;
    align-items:center;
    gap:16px;
    min-height:72px;
  }
  .brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
    flex-shrink:0;
    transition:transform .18s var(--ease);
  }
  .brand:hover{transform:translateY(-1px);}
  .brand-mark{
    width:36px;height:36px;
    display:grid;place-items:center;
    border-radius:10px;
    background:var(--ink);
    color:var(--brand);
    font-size:18px;
    font-weight:800;
    line-height:1;
    box-shadow:var(--shadow-sm);
  }
  .brand-text{
    font-size:17px;
    font-weight:800;
    letter-spacing:-0.01em;
    white-space:nowrap;
  }
  .nav-links{
    display:none;
    align-items:center;
    gap:6px;
    margin-left:18px;
  }
  .nav-link{
    position:relative;
    display:inline-block;
    padding:9px 12px;
    font-size:15px;
    font-weight:500;
    color:#2A313A;
    border-radius:10px;
    transition:color .18s var(--ease), background-color .18s var(--ease);
    white-space:nowrap;
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:12px;right:12px;
    bottom:4px;
    height:2px;
    background:var(--brand);
    border-radius:2px;
    transform:scaleX(0);
    transform-origin:left center;
    transition:transform .2s var(--ease);
  }
  .nav-link:hover{color:var(--ink);background:rgba(18,214,168,.10);}
  .nav-link:hover::after,.nav-link.active::after{transform:scaleX(1);}
  .nav-link.active{color:var(--ink);font-weight:700;}
  .nav-right{
    display:flex;
    align-items:center;
    gap:10px;
    margin-left:auto;
  }

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    min-height:50px;
    padding:0 28px;
    border-radius:12px;
    font-size:15px;
    font-weight:600;
    line-height:1;
    border:1.5px solid transparent;
    transition:transform .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease);
    white-space:nowrap;
  }
  .btn-primary{
    background:var(--brand);
    color:var(--ink);
    box-shadow:0 10px 22px -14px rgba(18,214,168,.95);
  }
  .btn-primary:hover{background:var(--brand-deep);color:#04231B;transform:translateY(-1px);box-shadow:0 16px 30px -16px rgba(10,158,126,.9);}
  .btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px -10px rgba(10,158,126,.8);}
  .btn-ghost{
    background:transparent;
    border-color:var(--ink);
    color:var(--ink);
  }
  .btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px);}
  .btn-sm{min-height:44px;padding:0 20px;font-size:14px;border-radius:11px;}
  .btn-block{width:100%;}

  .burger{
    display:inline-flex;
    flex-direction:column;
    justify-content:center;
    gap:5px;
    width:46px;height:44px;
    border-radius:11px;
    border:1px solid var(--line-strong);
    background:#fff;
    padding:0 12px;
    transition:background-color .18s var(--ease), border-color .18s var(--ease);
  }
  .burger span{display:block;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s var(--ease), opacity .2s var(--ease);}
  .burger:hover{background:rgba(18,214,168,.12);border-color:rgba(18,214,168,.5);}

  .drawer{
    position:fixed;
    top:0;right:0;
    width:min(86vw,340px);
    height:100%;
    background:#fff;
    border-left:1px solid var(--line);
    box-shadow:-24px 0 48px -32px rgba(16,20,26,.55);
    transform:translateX(102%);
    transition:transform .26s var(--ease);
    z-index:80;
    padding:22px 20px 32px;
    display:flex;
    flex-direction:column;
    gap:16px;
    overflow-y:auto;
  }
  .drawer.open{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
  .drawer-close{
    width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
    display:grid;place-items:center;font-size:20px;line-height:1;color:var(--muted);
    transition:background-color .18s var(--ease),color .18s var(--ease);
  }
  .drawer-close:hover{background:rgba(16,20,26,.06);color:var(--ink);}
  .drawer-link{
    display:block;
    padding:13px 14px;
    border-radius:12px;
    font-size:16px;
    font-weight:600;
    border:1px solid var(--line);
    background:#fff;
    transition:border-color .18s var(--ease), background-color .18s var(--ease), transform .18s var(--ease);
  }
  .drawer-link:hover{border-color:rgba(18,214,168,.55);background:rgba(18,214,168,.08);transform:translateX(2px);}
  .drawer-link.active{border-color:var(--brand);background:rgba(18,214,168,.14);}
  .scrim{
    position:fixed;inset:0;background:rgba(16,20,26,.42);
    opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease);z-index:70;
  }
  .scrim.open{opacity:1;visibility:visible;}

  @media (min-width:1024px){
    .nav-links{display:flex;}
    .burger{display:none;}
    .drawer,.scrim{display:none;}
  }

  /* ============ 通用区块 ============ */
  .section{padding:64px 0;}
  .section-tight{padding:48px 0;}
  @media (min-width:768px){ .section{padding:84px 0;} .section-tight{padding:60px 0;} }

  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    font-weight:600;
    color:var(--brand-deep);
    letter-spacing:.02em;
  }
  .eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px;}

  .h2{
    font-size:clamp(26px,3.4vw,38px);
    line-height:1.2;
    font-weight:750;
    letter-spacing:-0.01em;
    margin-top:14px;
  }
  .lead{color:var(--muted);font-size:15.5px;line-height:1.85;margin-top:14px;max-width:640px;}

  .crumb{
    font-size:13px;
    color:var(--muted);
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:6px;
  }
  .crumb a{transition:color .18s var(--ease);}
  .crumb a:hover{color:var(--brand-deep);}
  .crumb .sep{color:rgba(16,20,26,.28);}
  .crumb .cur{color:var(--muted);}

  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:4px 10px;
    border-radius:6px;
    font-size:12px;
    font-weight:600;
    line-height:1.6;
    white-space:nowrap;
  }
  .badge-brand{background:rgba(18,214,168,.16);color:#076652;}
  .badge-accent{background:rgba(255,90,60,.14);color:#B32D16;}
  .badge-ink{background:rgba(16,20,26,.07);color:#39414B;}

  /* ============ 分类 Hero ============ */
  .cat-hero{
    position:relative;
    padding:34px 0 40px;
    border-bottom:1px solid var(--line);
    background:
      linear-gradient(rgba(16,20,26,.035) 1px, transparent 1px) 0 0/48px 48px,
      linear-gradient(90deg, rgba(16,20,26,.035) 1px, transparent 1px) 0 0/48px 48px,
      var(--paper);
    overflow:hidden;
  }
  .cat-hero-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:28px;
    align-items:center;
    min-height:40vh;
  }
  .cat-hero h1{
    font-size:clamp(34px,5.2vw,58px);
    line-height:1.12;
    font-weight:800;
    letter-spacing:-0.01em;
    margin-top:16px;
  }
  .cat-hero p.sub{
    margin-top:16px;
    font-size:16.5px;
    line-height:1.85;
    color:var(--muted);
    max-width:560px;
  }
  .cat-hero-media{
    position:relative;
    border-radius:var(--radius-lg);
    overflow:hidden;
    border:1px solid var(--line);
    box-shadow:var(--shadow-md);
    aspect-ratio:16/9;
    background:var(--ink);
  }
  .cat-hero-media img{width:100%;height:100%;object-fit:cover;}
  .cat-hero-tag{
    position:absolute;
    left:14px;bottom:14px;
    background:rgba(16,20,26,.82);
    color:#EDF1F0;
    border-radius:10px;
    padding:8px 12px;
    font-size:12.5px;
    line-height:1.5;
    border:1px solid rgba(18,214,168,.35);
  }
  .cat-hero-tag b{color:var(--brand);font-family:var(--num-font);}
  @media (min-width:1024px){
    .cat-hero-grid{grid-template-columns:1.05fr .95fr;gap:44px;}
  }

  .stat-strip{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:14px;
    margin-top:28px;
    max-width:620px;
  }
  .stat-item{
    border:1px solid var(--line);
    background:#fff;
    border-radius:14px;
    padding:12px 14px;
  }
  .stat-item b{
    display:block;
    font-family:var(--num-font);
    font-variant-numeric:tabular-nums;
    font-size:24px;
    line-height:1.2;
    color:var(--accent);
    font-weight:700;
  }
  .stat-item span{font-size:12.5px;color:var(--muted);}
  @media (min-width:768px){ .stat-strip{grid-template-columns:repeat(4,minmax(0,1fr));max-width:none;} }

  /* ============ 筛选标签条 ============ */
  .chip-bar-wrap{
    border-bottom:1px solid var(--line);
    background:#fff;
    position:relative;
  }
  .chip-bar{
    display:flex;
    gap:10px;
    overflow-x:auto;
    padding:16px 20px;
    scrollbar-width:none;
  }
  .chip-bar::-webkit-scrollbar{display:none;}
  @media (min-width:768px){ .chip-bar{padding:16px 32px;max-width:1200px;margin:0 auto;} }
  .chip{
    flex:0 0 auto;
    padding:9px 16px;
    border-radius:999px;
    border:1px solid var(--line-strong);
    background:#fff;
    font-size:14px;
    font-weight:600;
    color:#39414B;
    transition:border-color .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease), transform .18s var(--ease);
  }
  .chip:hover{border-color:rgba(18,214,168,.7);color:var(--ink);transform:translateY(-1px);}
  .chip.active{background:var(--ink);border-color:var(--ink);color:var(--brand);}

  /* ============ 图文卡片网格 ============ */
  .card-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:16px;
    margin-top:36px;
  }
  @media (min-width:640px){ .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;} }
  @media (min-width:1024px){ .card-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;} }

  .g-card{
    display:flex;
    flex-direction:column;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    overflow:hidden;
    box-shadow:var(--shadow-sm);
    transition:transform .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease);
  }
  .g-card:hover{
    transform:translateY(-4px);
    box-shadow:var(--shadow-lg);
    border-color:rgba(18,214,168,.4);
  }
  .g-cover{
    position:relative;
    aspect-ratio:16/10;
    overflow:hidden;
    background:var(--ink-2);
  }
  .g-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
  .g-card:hover .g-cover img{transform:scale(1.04);}
  .g-corner{
    position:absolute;
    left:12px;top:12px;
  }
  .g-body{padding:18px 18px 16px;display:flex;flex-direction:column;flex:1;gap:10px;}
  .g-title{
    font-size:19px;
    line-height:1.4;
    font-weight:700;
    letter-spacing:-0.005em;
  }
  .g-desc{
    font-size:14px;
    line-height:1.8;
    color:var(--muted);
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
  }
  .g-meta{
    margin-top:auto;
    padding-top:12px;
    border-top:1px solid var(--line);
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    font-size:12.5px;
    color:var(--muted);
  }
  .g-meta .time{font-family:var(--num-font);font-variant-numeric:tabular-nums;}

  /* ============ 深墨板块 ============ */
  .dark-band{
    background:var(--ink);
    color:#EDF1F0;
  }
  .dark-band .h2{color:#EDF1F0;}
  .dark-band .lead{color:rgba(237,241,240,.66);}
  .dark-band .eyebrow{color:var(--brand);}
  .dark-panel{
    background:var(--ink-2);
    border:1px solid rgba(18,214,168,.28);
    border-radius:var(--radius);
    padding:20px;
  }

  /* ============ 使用指南（编号单列） ============ */
  .guide-list{margin-top:32px;border-top:1px solid var(--line);}
  .guide-item{
    display:grid;
    grid-template-columns:64px 1fr;
    gap:18px;
    padding:24px 0;
    border-bottom:1px solid var(--line);
    transition:background-color .18s var(--ease);
  }
  .guide-item:hover{background:rgba(18,214,168,.05);}
  .guide-no{
    font-family:var(--num-font);
    font-variant-numeric:tabular-nums;
    font-size:44px;
    line-height:1;
    font-weight:700;
    color:transparent;
    -webkit-text-stroke:1.4px rgba(255,90,60,.85);
  }
  .guide-item h3{font-size:19px;font-weight:700;line-height:1.4;}
  .guide-item p{margin-top:8px;font-size:15px;color:var(--muted);max-width:560px;}
  .dark-band .guide-list{border-color:rgba(237,241,240,.16);}
  .dark-band .guide-item{border-color:rgba(237,241,240,.14);}
  .dark-band .guide-item p{color:rgba(237,241,240,.66);}
  .dark-band .guide-no{color:transparent;-webkit-text-stroke:1.4px var(--brand);}

  /* ============ 更新节奏时间线 ============ */
  .timeline{
    margin-top:34px;
    display:grid;
    grid-template-columns:1fr;
    gap:14px;
  }
  .tl-item{
    position:relative;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius);
    padding:18px 20px 18px 22px;
    box-shadow:var(--shadow-sm);
    transition:transform .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease);
  }
  .tl-item::before{
    content:"";
    position:absolute;
    left:0;top:16px;bottom:16px;
    width:4px;
    border-radius:0 4px 4px 0;
    background:var(--brand);
  }
  .tl-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(18,214,168,.42);}
  .tl-item .tl-day{
    font-family:var(--num-font);
    font-size:12.5px;
    font-weight:700;
    color:var(--accent);
    letter-spacing:.04em;
  }
  .tl-item h3{font-size:17px;font-weight:700;margin-top:6px;}
  .tl-item p{margin-top:6px;font-size:14px;color:var(--muted);}
  @media (min-width:768px){ .timeline{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;} }
  @media (min-width:1024px){ .timeline{grid-template-columns:repeat(4,minmax(0,1fr));} }

  /* ============ 会员权益双栏 ============ */
  .split{
    display:grid;
    grid-template-columns:1fr;
    gap:28px;
    align-items:center;
    margin-top:32px;
  }
  @media (min-width:1024px){ .split{grid-template-columns:.92fr 1.08fr;gap:48px;} }
  .split-media{
    border-radius:var(--radius-lg);
    overflow:hidden;
    border:1px solid var(--line);
    box-shadow:var(--shadow-md);
    aspect-ratio:16/10;
    background:var(--ink-2);
  }
  .split-media img{width:100%;height:100%;object-fit:cover;}
  .tick-list{margin-top:22px;display:grid;gap:14px;}
  .tick-list li{display:grid;grid-template-columns:26px 1fr;gap:12px;align-items:flex-start;font-size:15px;color:#2A313A;}
  .tick-list li b{display:block;font-weight:700;color:var(--ink);}
  .tick-list li span{display:block;color:var(--muted);font-size:14px;margin-top:2px;}
  .tick{
    width:22px;height:22px;border-radius:7px;
    background:rgba(18,214,168,.18);
    color:#076652;
    display:grid;place-items:center;
    font-size:13px;font-weight:800;line-height:1;
    margin-top:3px;
  }

  /* ============ FAQ ============ */
  .faq-list{margin-top:30px;max-width:780px;}
  .faq-item{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius);
    margin-bottom:12px;
    overflow:hidden;
    transition:border-color .18s var(--ease), box-shadow .18s var(--ease);
  }
  .faq-item:hover{border-color:rgba(18,214,168,.42);}
  .faq-item.open{border-color:rgba(18,214,168,.55);box-shadow:var(--shadow-sm);}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    text-align:left;
    padding:18px 20px;
    font-size:16.5px;
    font-weight:600;
    line-height:1.6;
  }
  .faq-ico{
    position:relative;
    flex:0 0 auto;
    width:22px;height:22px;
    border-radius:50%;
    border:1.5px solid var(--line-strong);
    transition:transform .26s var(--ease), border-color .26s var(--ease), background-color .26s var(--ease);
  }
  .faq-ico::before,.faq-ico::after{
    content:"";
    position:absolute;
    left:50%;top:50%;
    background:var(--ink);
    border-radius:2px;
    transform:translate(-50%,-50%);
    transition:opacity .22s var(--ease), background-color .22s var(--ease);
  }
  .faq-ico::before{width:10px;height:1.6px;}
  .faq-ico::after{width:1.6px;height:10px;}
  .faq-item.open .faq-ico{transform:rotate(180deg);background:var(--brand);border-color:var(--brand);}
  .faq-item.open .faq-ico::before,.faq-item.open .faq-ico::after{background:var(--ink);}
  .faq-item.open .faq-ico::after{opacity:0;}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .32s var(--ease);
  }
  .faq-a p{
    padding:0 20px 20px;
    font-size:15px;
    line-height:1.85;
    color:var(--muted);
  }

  /* ============ CTA 条 ============ */
  .cta-band{
    background:var(--ink);
    color:#EDF1F0;
    border-radius:var(--radius-lg);
    padding:28px 24px;
    display:grid;
    grid-template-columns:1fr;
    gap:22px;
    align-items:center;
    border:1px solid rgba(18,214,168,.22);
  }
  @media (min-width:1024px){
    .cta-band{grid-template-columns:1.3fr .7fr;padding:36px 40px;gap:32px;}
  }
  .cta-band h2{
    font-size:clamp(22px,2.6vw,30px);
    line-height:1.25;
    font-weight:750;
    letter-spacing:-0.01em;
  }
  .cta-points{
    margin-top:14px;
    display:flex;
    flex-wrap:wrap;
    gap:10px 20px;
    font-size:14px;
    color:rgba(237,241,240,.72);
  }
  .cta-points span{display:inline-flex;align-items:center;gap:8px;}
  .cta-points span::before{
    content:"";
    width:14px;height:14px;border-radius:5px;
    background:rgba(18,214,168,.22);
    border:1px solid rgba(18,214,168,.6);
    flex:0 0 auto;
  }
  .cta-form{
    display:grid;
    gap:12px;
  }
  .cta-form input{
    height:50px;
    border-radius:12px;
    background:var(--ink-2);
    border:1px solid rgba(237,241,240,.2);
    color:#EDF1F0;
    padding:0 16px;
    font-size:15px;
    transition:border-color .18s var(--ease), box-shadow .18s var(--ease);
  }
  .cta-form input::placeholder{color:rgba(237,241,240,.42);}
  .cta-form input:focus{
    outline:none;
    border-color:var(--brand);
    box-shadow:0 0 0 3px rgba(18,214,168,.22);
  }
  .cta-note{font-size:12px;line-height:1.7;color:rgba(237,241,240,.5);}

  /* ============ 页脚 ============ */
  .site-footer{
    background:var(--ink);
    color:rgba(237,241,240,.78);
    padding:56px 0 26px;
    margin-top:64px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:30px;
  }
  @media (min-width:640px){ .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));} }
  @media (min-width:1024px){ .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px;} }
  .footer-brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
    color:#EDF1F0;
    font-size:17px;
    font-weight:800;
  }
  .footer-brand .brand-mark{background:rgba(18,214,168,.16);color:var(--brand);}
  .footer-about{margin-top:14px;font-size:13.5px;line-height:1.85;color:rgba(237,241,240,.6);max-width:320px;}
  .footer-col h3{font-size:13.5px;font-weight:700;color:#EDF1F0;letter-spacing:0;margin-bottom:14px;}
  .footer-col li{margin-bottom:10px;}
  .footer-col a{
    font-size:14px;
    line-height:2;
    color:rgba(237,241,240,.68);
    transition:color .18s var(--ease), transform .18s var(--ease);
    display:inline-block;
  }
  .footer-col a:hover{color:var(--brand);transform:translateX(2px);}
  .footer-meta{font-size:13.5px;line-height:1.9;color:rgba(237,241,240,.62);}
  .footer-bottom{
    margin-top:36px;
    padding-top:20px;
    border-top:1px solid rgba(237,241,240,.14);
    display:flex;
    flex-wrap:wrap;
    gap:10px 20px;
    align-items:center;
    justify-content:space-between;
    font-size:12.5px;
    color:rgba(237,241,240,.5);
  }
  .footer-bottom .num{color:rgba(237,241,240,.55);}

  /* ============ 动效 ============ */
  .reveal{opacity:0;transform:translateY(12px);}
  .reveal.is-in{
    opacity:1;transform:none;
    transition:opacity .42s var(--ease), transform .42s var(--ease);
  }
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto;}
    .reveal{opacity:1;transform:none;}
    *{animation:none !important;transition:none !important;}
  }