/* roulang page: index */
:root{
  --ink:#14171A;
  --ink-soft:#3C4441;
  --muted:#6B7370;
  --paper:#F6F7F3;
  --surface:#FFFFFF;
  --line:#E2E5DE;
  --primary:#0F6E5C;
  --primary-deep:#0A4E42;
  --primary-soft:#E6F2EE;
  --accent:#D6FF4B;
  --warn:#C2410C;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --sh-1:0 1px 2px rgba(20,23,26,.06);
  --sh-2:0 10px 28px -14px rgba(20,23,26,.24);
  --mono:ui-monospace,"SF Mono",Consolas,"Liberation Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --bs-body-bg:#F6F7F3;
  --bs-body-color:#14171A;
  --bs-body-font-family:var(--sans);
  --bs-border-color:#E2E5DE;
  --bs-border-radius:10px;
  --bs-primary:#0F6E5C;
  --bs-primary-rgb:15,110,92;
  --bs-link-color:#0F6E5C;
  --bs-link-hover-color:#0A4E42;
  --bs-emphasis-color:#14171A;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--paper);
  font-feature-settings:"tnum";
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease,opacity .18s ease;}
a:hover{color:var(--primary-deep);}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4{line-height:1.25;font-weight:700;margin:0;letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus{outline:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;box-shadow:0 0 0 3px rgba(15,110,92,.25);border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.mono{font-family:var(--mono);font-feature-settings:"tnum";}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--primary);background:var(--primary-soft);
  padding:5px 12px;border-radius:999px;margin-bottom:14px;
}
.eyebrow::before{content:">";opacity:.7;}
h2.section-title{font-size:30px;color:var(--ink);}
.section-sub{color:var(--muted);font-size:14.5px;max-width:640px;margin-top:10px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:500;color:var(--primary);
  border-bottom:1px solid transparent;padding-bottom:2px;transition:border-color .18s ease,color .18s ease;
}
.text-link::before{content:"›";font-family:var(--mono);}
.text-link:hover{border-bottom-color:var(--primary);color:var(--primary-deep);}

/* ---------- buttons ---------- */
.btn-main,.btn-ghost,.btn-soft{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:500;
  border:1.5px solid transparent;cursor:pointer;transition:all .18s ease;white-space:nowrap;
}
.btn-main{background:var(--primary);color:#fff;box-shadow:var(--sh-1);}
.btn-main:hover{background:#0c5b4c;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-main:active{transform:translateY(0);background:var(--primary-deep);}
.btn-ghost{background:transparent;color:var(--primary);border-color:var(--primary);}
.btn-ghost:hover{background:rgba(15,110,92,.08);color:var(--primary-deep);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-soft{background:var(--primary-soft);color:var(--primary-deep);}
.btn-soft:hover{background:#d7ebe5;color:var(--primary-deep);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn-primary{
  --bs-btn-bg:var(--primary);--bs-btn-border-color:var(--primary);
  --bs-btn-hover-bg:#0c5b4c;--bs-btn-hover-border-color:#0c5b4c;
  --bs-btn-active-bg:var(--primary-deep);--bs-btn-active-border-color:var(--primary-deep);
  --bs-btn-color:#fff;--bs-btn-hover-color:#fff;
  border-radius:var(--r-btn);height:48px;display:inline-flex;align-items:center;justify-content:center;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,247,243,.88);backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 4px 18px -14px rgba(20,23,26,.4);background:rgba(255,255,255,.94);}
.nav-wrap{display:flex;align-items:center;gap:24px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:16.5px;letter-spacing:-.01em;}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:30px;height:30px;border-radius:8px;background:var(--primary-deep);color:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:15px;font-weight:700;
}
.brand-short{display:none;}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:6px;}
.main-nav .nav-link{
  position:relative;padding:8px 14px;font-size:14.5px;color:var(--ink-soft);border-radius:8px;
  transition:color .18s ease,background .18s ease;
}
.main-nav .nav-link:hover{color:var(--primary-deep);background:rgba(15,110,92,.06);}
.main-nav .nav-link.active{color:var(--primary-deep);font-weight:500;}
.main-nav .nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--primary);border-radius:2px;
}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.command-search{
  display:flex;align-items:center;gap:8px;height:40px;padding:0 10px 0 12px;
  background:var(--surface);border:1px solid var(--line);border-radius:10px;min-width:262px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.command-search:hover{border-color:#cfd5cc;}
.command-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,110,92,.18);}
.command-search .prompt{font-family:var(--mono);color:var(--primary);font-size:15px;}
.command-search input{border:0;background:transparent;flex:1;min-width:0;font-size:14px;color:var(--ink);outline:none;}
.command-search input::placeholder{color:#9aa19d;}
.command-search kbd{
  font-family:var(--mono);font-size:11.5px;color:var(--muted);background:var(--paper);
  border:1px solid var(--line);border-radius:6px;padding:2px 6px;
}
.icon-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--surface);
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink-soft);transition:all .18s ease;
}
.icon-btn:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px);}
.menu-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--surface);
  display:none;align-items:center;justify-content:center;color:var(--ink);
}
.menu-btn:hover{border-color:var(--primary);color:var(--primary);}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,23,26,.42);opacity:0;visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;z-index:1040;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);background:var(--surface);z-index:1050;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;padding:20px;gap:18px;box-shadow:-18px 0 40px -24px rgba(20,23,26,.5);
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-nav{display:flex;flex-direction:column;gap:2px;}
.drawer-nav a{padding:12px 12px;border-radius:10px;color:var(--ink-soft);font-size:15px;}
.drawer-nav a:hover{background:var(--primary-soft);color:var(--primary-deep);}
.drawer-nav a.active{background:var(--primary-soft);color:var(--primary-deep);font-weight:500;}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:var(--primary-soft) url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(104deg,rgba(8,58,49,.95) 0%,rgba(10,78,66,.86) 42%,rgba(10,78,66,.42) 100%);
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:1;opacity:.08;
  background-image:radial-gradient(#fff 1px,transparent 1px);
  background-size:14px 14px;
}
.hero-inner{position:relative;z-index:2;padding:104px 0 92px;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;
  color:var(--accent);border:1px solid rgba(214,255,75,.4);background:rgba(214,255,75,.08);
  padding:5px 12px;border-radius:999px;margin-bottom:20px;
}
.hero h1{font-size:44px;color:#fff;margin-bottom:18px;}
.hero-sub{font-size:17px;color:rgba(255,255,255,.86);max-width:560px;margin-bottom:28px;}
.hero-sub span{display:block;}
.hero-search{
  display:flex;align-items:center;gap:10px;background:#fff;border-radius:12px;padding:8px 8px 8px 16px;
  max-width:560px;box-shadow:0 18px 40px -24px rgba(0,0,0,.6);
}
.hero-search .prompt{font-family:var(--mono);color:var(--primary);font-size:16px;}
.hero-search input{flex:1;min-width:0;border:0;outline:none;font-size:15px;color:var(--ink);background:transparent;}
.hero-search input::placeholder{color:#9aa19d;}
.hero-search .btn-main{height:44px;padding:0 20px;}
.hero-cta{display:flex;gap:14px;margin-top:24px;flex-wrap:wrap;}
.hero-cta .btn-ghost{color:#fff;border-color:rgba(255,255,255,.55);}
.hero-cta .btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff;}
.hero-note{margin-top:20px;font-size:13.5px;color:rgba(255,255,255,.72);font-family:var(--mono);}
.hero-panel{
  background:rgba(8,50,42,.78);border:1px solid rgba(214,255,75,.22);border-radius:var(--r-card);
  padding:24px;backdrop-filter:blur(6px);
}
.hero-panel h2{font-size:16px;color:#fff;display:flex;align-items:center;gap:8px;margin-bottom:6px;}
.hero-panel h2::before{content:"[";color:var(--accent);font-family:var(--mono);}
.hero-panel h2::after{content:"]";color:var(--accent);font-family:var(--mono);}
.hero-panel .panel-hint{font-size:13px;color:rgba(255,255,255,.62);margin-bottom:18px;}
.hero-list{display:flex;flex-direction:column;}
.hero-list li{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 0;border-bottom:1px dashed rgba(255,255,255,.16);font-size:14px;color:rgba(255,255,255,.9);
}
.hero-list li:last-child{border-bottom:0;}
.hero-list .val{font-family:var(--mono);color:var(--accent);font-size:14px;}
.hero-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);display:inline-block;margin-right:8px;box-shadow:0 0 0 3px rgba(214,255,75,.18);}

/* ---------- metrics ---------- */
.metrics{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--surface);}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.metric{padding:36px 28px;border-right:1px solid var(--line);}
.metric:last-child{border-right:0;}
.metric .num{font-family:var(--mono);font-size:32px;font-weight:700;color:var(--primary-deep);line-height:1.1;}
.metric .num small{font-size:15px;font-weight:500;margin-left:4px;color:var(--primary);}
.metric .label{margin-top:8px;font-size:13.5px;color:var(--muted);}

/* ---------- news / cms ---------- */
.news-feature{
  display:grid;grid-template-columns:1.02fr .98fr;gap:0;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.news-feature:hover{border-color:rgba(15,110,92,.4);box-shadow:var(--sh-2);transform:translateY(-2px);}
.news-feature .thumb{position:relative;min-height:280px;background:#eef1ea;}
.news-feature .thumb img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;}
.news-feature .body{padding:32px;display:flex;flex-direction:column;gap:14px;}
.news-feature h3{font-size:23px;}
.news-feature h3 a{color:var(--ink);}
.news-feature h3 a:hover{color:var(--primary);}
.news-feature p{color:var(--muted);font-size:14.5px;}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:24px;}
.news-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;height:100%;
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.news-card:hover{border-color:rgba(15,110,92,.4);box-shadow:var(--sh-2);transform:translateY(-2px);}
.news-card .thumb{background:#eef1ea;}
.news-card .thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;}
.news-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-card h3{font-size:18px;font-weight:500;}
.news-card h3 a{color:var(--ink);}
.news-card h3 a:hover{color:var(--primary);}
.news-card .desc{
  color:var(--muted);font-size:14px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:6px;font-size:13px;color:var(--muted);font-family:var(--mono);}
.badge-pill{
  display:inline-flex;align-items:center;padding:3px 11px;border-radius:999px;font-size:12.5px;font-weight:500;
  background:var(--accent);color:var(--ink);line-height:1.7;
}
.badge-soft{background:var(--primary-soft);color:var(--primary);}
.badge-pill.is-soft{background:var(--primary-soft);color:var(--primary);}
.empty-state{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  text-align:center;background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-card);padding:32px;
}
.empty-state i{font-size:28px;color:var(--muted);}
.empty-state .et{color:var(--ink-soft);font-size:15px;}

/* ---------- compare table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface);}
table.plan-table{width:100%;border-collapse:collapse;min-width:760px;}
table.plan-table th,table.plan-table td{
  padding:18px 20px;text-align:center;font-size:14.5px;border-bottom:1px solid var(--line);
}
table.plan-table thead th{
  background:var(--primary-soft);color:var(--primary-deep);font-weight:500;font-size:14.5px;
  position:sticky;top:0;z-index:2;
}
table.plan-table thead th:first-child,table.plan-table tbody th{text-align:left;}
table.plan-table tbody th{font-weight:400;color:var(--ink-soft);background:transparent;}
table.plan-table tbody tr:hover{background:var(--paper);}
table.plan-table tbody tr:last-child th,table.plan-table tbody tr:last-child td{border-bottom:0;}
table.plan-table .yes{color:var(--primary);font-weight:700;}
table.plan-table .no{color:#b5bbb7;}
table.plan-table .rec-col{background:rgba(15,110,92,.045);border-left:1px solid rgba(15,110,92,.28);border-right:1px solid rgba(15,110,92,.28);}
table.plan-table thead th.rec-col{position:relative;color:var(--primary-deep);}
table.plan-table thead th.rec-col::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--accent);}
.plan-note{margin-top:14px;font-size:13.5px;color:var(--muted);}

/* ---------- tiers ---------- */
.tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.tier-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:28px;
  display:flex;flex-direction:column;gap:16px;transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.tier-card:hover{border-color:rgba(15,110,92,.4);box-shadow:var(--sh-2);transform:translateY(-2px);}
.tier-card.is-rec{background:var(--primary-soft);border-color:rgba(15,110,92,.35);}
.tier-num{
  display:inline-flex;align-items:center;justify-content:center;width:42px;height:30px;border-radius:8px;
  background:var(--accent);color:var(--ink);font-family:var(--mono);font-size:14px;font-weight:700;
}
.tier-card h3{font-size:20px;}
.tier-price{font-family:var(--mono);font-size:15px;color:var(--primary-deep);}
.tier-list{display:flex;flex-direction:column;gap:10px;}
.tier-list li{position:relative;padding-left:22px;font-size:14.5px;color:var(--ink-soft);}
.tier-list li::before{content:"›";position:absolute;left:0;top:0;font-family:var(--mono);color:var(--primary);font-weight:700;}

/* ---------- preview ---------- */
.preview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.preview-card{
  position:relative;display:block;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);background:var(--surface);
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.preview-card:hover{border-color:rgba(15,110,92,.4);box-shadow:var(--sh-2);transform:translateY(-2px);}
.preview-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.preview-veil{
  position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,78,66,.18) 0%,rgba(10,78,66,.82) 100%);
  backdrop-filter:blur(3px);display:flex;flex-direction:column;justify-content:flex-end;gap:8px;padding:22px;color:#fff;
}
.preview-veil i{width:34px;height:34px;border-radius:10px;background:rgba(214,255,75,.16);color:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;font-size:15px;border:1px solid rgba(214,255,75,.35);}
.preview-veil h3{font-size:17px;color:#fff;font-weight:500;}
.preview-veil p{font-size:13.5px;color:rgba(255,255,255,.8);}

/* ---------- faq ---------- */
.faq-wrap{max-width:800px;margin:0 auto;}
.accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);}
.accordion-button{
  background:transparent;color:var(--ink);font-size:16px;font-weight:500;padding:22px 8px 22px 26px;
  border-radius:0;box-shadow:none;position:relative;
}
.accordion-button::before{
  content:">";position:absolute;left:4px;font-family:var(--mono);color:var(--primary);font-weight:700;
}
.accordion-button:not(.collapsed){color:var(--primary-deep);background:transparent;box-shadow:none;}
.accordion-button:not(.collapsed)::after{color:var(--primary);}
.accordion-button::after{background-size:14px;width:14px;height:14px;margin-left:auto;}
.accordion-button:focus{box-shadow:0 0 0 3px rgba(15,110,92,.2);border-radius:8px;}
.accordion-body{padding:0 8px 24px 26px;color:var(--ink-soft);font-size:14.5px;border-left:3px solid transparent;}
.accordion-item:has(.accordion-button:not(.collapsed)){border-left:3px solid var(--primary);padding-left:8px;}

/* ---------- join ---------- */
.join{background:var(--primary-deep);color:#fff;position:relative;overflow:hidden;}
.join::before{
  content:"[ ] › [ ] › [ ]";position:absolute;right:-10px;top:26px;font-family:var(--mono);font-size:120px;
  color:rgba(255,255,255,.05);letter-spacing:-.04em;white-space:nowrap;pointer-events:none;
}
.join h2{color:#fff;font-size:30px;}
.join .section-sub{color:rgba(255,255,255,.72);}
.join-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:40px;align-items:start;position:relative;z-index:2;}
.plan-pick{display:flex;flex-direction:column;gap:14px;}
.plan-option{
  display:flex;align-items:flex-start;gap:14px;padding:18px 20px;border-radius:var(--r-card);cursor:pointer;
  background:rgba(255,255,255,.05);border:1.5px solid rgba(255,255,255,.16);transition:all .18s ease;
}
.plan-option:hover{border-color:rgba(214,255,75,.5);background:rgba(255,255,255,.09);}
.plan-option input{margin-top:5px;accent-color:var(--accent);width:17px;height:17px;}
.plan-option .pt{font-size:16px;font-weight:500;color:#fff;}
.plan-option .pd{font-size:13.5px;color:rgba(255,255,255,.68);margin-top:3px;}
.plan-option:has(input:checked){border-color:var(--accent);background:rgba(214,255,75,.1);}
.join-form{
  background:var(--surface);border-radius:var(--r-card);padding:30px;color:var(--ink);box-shadow:var(--sh-2);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:16px;}
.field label{font-size:13.5px;color:var(--ink-soft);}
.field .req{color:var(--warn);}
.form-control{
  height:48px;border:1px solid var(--line);border-radius:var(--r-input);padding:0 14px;font-size:15px;
  background:var(--surface);color:var(--ink);transition:border-color .18s ease,box-shadow .18s ease;
}
textarea.form-control{height:104px;padding:12px 14px;resize:vertical;}
.form-control:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,110,92,.2);outline:none;}
.form-hint{font-size:13px;color:var(--muted);margin-top:12px;}
.form-msg{display:none;margin-top:14px;font-size:13.5px;color:var(--primary);}
.form-msg.is-on{display:block;}

/* ---------- footer ---------- */
.site-footer{background:var(--primary-deep);color:rgba(255,255,255,.82);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:48px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16.5px;margin-bottom:14px;}
.footer-brand .brand-mark{background:var(--accent);color:var(--primary-deep);}
.footer-about{font-size:14px;color:rgba(255,255,255,.7);max-width:320px;}
.footer-contact{margin-top:16px;font-size:14px;color:rgba(214,255,75,.92);font-family:var(--mono);}
.site-footer h3{font-size:14px;color:#fff;letter-spacing:.06em;margin-bottom:16px;font-weight:500;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{color:rgba(255,255,255,.74);font-size:14px;}
.footer-links a:hover{color:var(--accent);}
.footer-meta{font-size:13.5px;color:rgba(255,255,255,.66);line-height:2;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);padding:20px 0;display:flex;align-items:center;
  justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.6);
}
.footer-bottom a{color:rgba(255,255,255,.72);}
.footer-bottom a:hover{color:var(--accent);}
.back-top{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  .command-search{min-width:200px;}
}
@media (max-width:991px){
  .section{padding:56px 0;}
  .section--tight{padding:48px 0;}
  h2.section-title{font-size:23px;}
  .main-nav,.command-search,.nav-right .icon-btn{display:none;}
  .menu-btn{display:inline-flex;}
  .brand-text{display:none;}
  .brand-short{display:inline;font-family:var(--mono);letter-spacing:.04em;}
  .hero-inner{grid-template-columns:1fr;padding:64px 0 56px;gap:32px;}
  .hero h1{font-size:30px;}
  .metrics-grid{grid-template-columns:1fr 1fr;}
  .metric{border-bottom:1px solid var(--line);}
  .metric:nth-child(2n){border-right:0;}
  .metric:nth-child(3),.metric:nth-child(4){border-bottom:0;}
  .news-feature{grid-template-columns:1fr;}
  .news-feature .thumb{min-height:200px;}
  .news-grid,.tier-grid,.preview-grid{grid-template-columns:1fr 1fr;}
  .join-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .news-grid,.tier-grid,.preview-grid{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .hero-search{flex-direction:column;align-items:stretch;padding:12px;gap:12px;}
  .hero-search input{height:40px;}
  .hero-search .btn-main{width:100%;}
  .hero-cta .btn-main,.hero-cta .btn-ghost{width:100%;}
  .metric{padding:26px 18px;}
  .footer-grid{grid-template-columns:1fr;}
}
@media (max-width:575px){
  body{font-size:15.5px;}
  .metrics-grid{grid-template-columns:1fr;}
  .metric{border-right:0;}
  .metric:nth-child(3){border-bottom:1px solid var(--line);}
  .section-head{margin-bottom:26px;}
}

/* roulang page: article */
:root{
  --ink:#14171A;
  --ink-soft:#3C4441;
  --muted:#6B7370;
  --paper:#F6F7F3;
  --surface:#FFFFFF;
  --line:#E2E5DE;
  --primary:#0F6E5C;
  --primary-deep:#0A4E42;
  --primary-soft:#E6F2EE;
  --accent:#D6FF4B;
  --warn:#C2410C;
  --radius-card:14px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(20,23,26,.06);
  --shadow-2:0 10px 28px -14px rgba(20,23,26,.24);
  --mono:ui-monospace,"SF Mono",Consolas,"Liberation Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --bs-primary-rgb:15,110,92;
  --bs-body-bg:#F6F7F3;
  --bs-body-color:#14171A;
  --bs-border-color:#E2E5DE;
  --bs-border-radius:14px;
  --bs-link-color:#0F6E5C;
  --bs-link-hover-color:#0A4E42;
  --bs-font-sans-serif:var(--sans);
  --bs-body-font-family:var(--sans);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--primary);text-decoration:none;}
a:hover{color:var(--primary-deep);}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.25;letter-spacing:-.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;box-shadow:0 0 0 3px rgba(15,110,92,.22);}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(246,247,243,.9);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.scrolled{
  background:rgba(255,255,255,.95);
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-1);
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:64px;}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--ink);font-weight:700;font-size:17px;letter-spacing:-.3px;
  white-space:nowrap;
}
.brand:hover{color:var(--ink);}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;flex:0 0 34px;
  border-radius:10px;
  background:var(--primary);color:var(--accent);
  font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:-1px;
}
.brand-short{display:none;font-family:var(--mono);font-size:15px;color:var(--primary);}
.main-nav{display:flex;align-items:center;gap:4px;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:20px 12px;
  font-size:15px;
  color:var(--ink-soft);
  transition:color .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;left:12px;right:12px;bottom:13px;height:2px;border-radius:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left center;
  transition:transform .22s ease;
}
.nav-link:hover{color:var(--primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--ink);font-weight:500;}
.nav-link.active::after{transform:scaleX(1);}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.command-search{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 10px 0 12px;
  min-width:250px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.command-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,110,92,.14);}
.command-search .prompt{color:var(--primary);font-family:var(--mono);font-size:14px;font-weight:700;}
.command-search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink);
}
.command-search input::placeholder{color:var(--muted);}
.command-search kbd{
  font-family:var(--mono);font-size:11.5px;color:var(--muted);
  background:var(--paper);border:1px solid var(--line);border-radius:6px;
  padding:1px 6px;line-height:1.5;
}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:var(--surface);color:var(--ink-soft);
  transition:.2s ease;
}
.icon-btn:hover{color:var(--primary);border-color:rgba(15,110,92,.4);transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;
  background:var(--primary);color:#fff;font-weight:500;font-size:15px;
  border:1px solid var(--primary);border-radius:var(--radius-btn);
  cursor:pointer;transition:.2s ease;white-space:nowrap;
}
.btn-main:hover{background:var(--primary-deep);border-color:var(--primary-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-main:active{transform:translateY(0);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;
  background:transparent;color:var(--primary);
  border:1.5px solid var(--primary);border-radius:var(--radius-btn);
  font-weight:500;font-size:15px;cursor:pointer;transition:.2s ease;
}
.btn-ghost:hover{background:rgba(15,110,92,.08);color:var(--primary-deep);transform:translateY(-1px);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-size:14.5px;font-weight:500;
}
.btn-text span.u{border-bottom:1px solid transparent;transition:border-color .2s ease;}
.btn-text:hover span.u{border-bottom-color:var(--primary);}
.menu-btn{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:var(--surface);color:var(--ink);
  cursor:pointer;transition:.2s ease;
}
.menu-btn:hover{border-color:rgba(15,110,92,.4);color:var(--primary);}

/* ============ 面包屑 ============ */
.crumb-bar{padding:20px 0 0;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);}
.crumb li{display:inline-flex;align-items:center;gap:8px;}
.crumb li+li::before{content:"›";color:var(--muted);font-family:var(--mono);}
.crumb a{color:var(--muted);transition:color .2s ease;}
.crumb a:hover{color:var(--primary);}
.crumb li[aria-current="page"]{color:var(--ink-soft);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ============ 文章布局 ============ */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:56px;
  padding:28px 0 72px;
}
.article-main{min-width:0;}
.article-head{padding-bottom:26px;border-bottom:1px solid var(--line);}
.article-head h1{
  font-size:44px;
  line-height:1.22;
  letter-spacing:-.6px;
  margin-bottom:18px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13.5px;color:var(--muted);}
.article-meta .m{display:inline-flex;align-items:center;gap:6px;}
.article-meta .m i{color:var(--primary);font-size:12px;}
.badge-cat{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 12px;border-radius:999px;
  background:var(--accent);color:var(--ink);
  font-size:12.5px;font-weight:500;
}
.badge-state{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 12px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary);
  font-size:12.5px;font-weight:500;
}
.author-line{
  display:flex;align-items:center;gap:10px;
  margin-top:20px;padding:14px 16px;
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  font-size:13.5px;color:var(--muted);
}
.author-avatar{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:50%;
  background:var(--primary-soft);color:var(--primary);
  font-family:var(--mono);font-size:12px;font-weight:700;
}

/* ============ 正文排版 ============ */
.article-body{
  max-width:760px;
  padding-top:34px;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-soft);
}
.article-body h2{
  position:relative;
  font-size:30px;line-height:1.3;color:var(--ink);
  margin:2.1em 0 .8em;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.24em;bottom:.24em;width:3px;
  border-radius:2px;background:var(--primary);
}
.article-body h3{font-size:20px;line-height:1.4;color:var(--ink);margin:1.8em 0 .7em;}
.article-body h2:first-child,.article-body h3:first-child{margin-top:0;}
.article-body p{margin:0 0 1.4em;}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.35em;}
.article-body ul li{position:relative;padding-left:6px;margin-bottom:.55em;list-style:none;}
.article-body ul li::before{
  content:"";position:absolute;left:-1.05em;top:.72em;
  width:6px;height:6px;border-radius:2px;background:var(--primary);
}
.article-body ol{list-style:decimal;}
.article-body ol li{margin-bottom:.55em;padding-left:4px;}
.article-body strong{color:var(--ink);font-weight:700;}
.article-body a{color:var(--primary);border-bottom:1px solid rgba(15,110,92,.32);}
.article-body a:hover{color:var(--primary-deep);border-bottom-color:var(--primary-deep);}
.article-body blockquote{
  margin:1.6em 0;padding:16px 20px;
  background:var(--primary-soft);
  border-left:3px solid var(--primary);
  border-radius:0 12px 12px 0;
  color:var(--ink);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:14px;margin:1.6em auto;box-shadow:var(--shadow-1);}
.article-body figure{margin:1.8em 0;}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px;}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;display:block;overflow-x:auto;}
.article-body thead th{
  background:var(--primary-soft);color:var(--primary-deep);
  text-align:left;padding:12px 14px;font-weight:500;
  border-bottom:1px solid var(--line);white-space:nowrap;
}
.article-body tbody td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top;}
.article-body tbody tr:hover{background:var(--paper);}
.article-body pre{
  background:var(--paper);border:1px solid var(--line);border-radius:12px;
  padding:16px 18px;overflow-x:auto;margin:1.6em 0;
  font-family:var(--mono);font-size:13.5px;line-height:1.75;color:var(--ink);
}
.article-body code{
  font-family:var(--mono);font-size:.9em;
  background:var(--paper);border:1px solid var(--line);border-radius:6px;
  padding:1px 6px;color:var(--primary-deep);
}
.article-body pre code{background:none;border:0;padding:0;color:inherit;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0;}

/* ============ 空态 ============ */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-height:260px;text-align:center;gap:14px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:40px 24px;margin-top:32px;
}
.empty-state i{font-size:26px;color:var(--muted);}
.empty-state p{color:var(--muted);font-size:15px;}

/* ============ 侧栏 ============ */
.article-aside{position:relative;}
.aside-sticky{position:sticky;top:88px;display:flex;flex-direction:column;gap:20px;}
.aside-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:20px;
  box-shadow:var(--shadow-1);
}
.aside-card h3{
  font-size:14px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
}
.aside-card h3::before{
  content:"[ ]";font-family:var(--mono);font-size:11px;color:var(--primary);letter-spacing:-1px;
}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:320px;overflow:auto;}
.toc-list a{
  display:block;padding:7px 10px;border-radius:8px;
  font-size:13.5px;color:var(--ink-soft);line-height:1.5;
  border-left:2px solid transparent;transition:.18s ease;
}
.toc-list a:hover{background:var(--paper);color:var(--primary);border-left-color:var(--primary);}
.toc-list li.is-sub a{padding-left:22px;font-size:13px;color:var(--muted);}
.aside-card.accent-card{
  background:linear-gradient(180deg,var(--primary-soft),#fff 78%);
  border-color:rgba(15,110,92,.24);
}
.aside-card.accent-card h3::before{content:"›";}
.aside-card.accent-card p{font-size:13.5px;color:var(--ink-soft);margin-bottom:14px;line-height:1.7;}
.aside-card.accent-card .btn-main{width:100%;height:42px;font-size:14.5px;}
.cat-links{display:flex;flex-direction:column;gap:8px;}
.cat-links a{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:10px 12px;border-radius:10px;border:1px solid var(--line);
  font-size:14px;color:var(--ink-soft);background:var(--surface);transition:.2s ease;
}
.cat-links a i{color:var(--primary);font-size:12px;}
.cat-links a:hover{border-color:rgba(15,110,92,.42);color:var(--primary);transform:translateX(2px);}

/* ============ 相关推荐 ============ */
.related{padding:8px 0 56px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;}
.section-head h2{font-size:30px;}
.section-head .hint{font-size:13.5px;color:var(--muted);}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{
  display:flex;flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(15,110,92,.4);}
.card-thumb{
  position:relative;aspect-ratio:16/10;background:var(--paper);
  overflow:hidden;
}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.card:hover .card-thumb img{transform:scale(1.04);}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:18px;font-weight:500;line-height:1.45;}
.card-body h3 a{color:var(--ink);}
.card-body h3 a:hover{color:var(--primary);}
.card-desc{
  font-size:14px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-top:auto;padding-top:6px;font-size:12.5px;color:var(--muted);
  font-family:var(--mono);font-feature-settings:"tnum";
}
.card-foot .cat{
  font-family:var(--sans);background:var(--primary-soft);color:var(--primary);
  padding:2px 10px;border-radius:999px;font-size:12px;
}

/* ============ 文末操作 ============ */
.article-actions{
  display:flex;flex-wrap:wrap;gap:14px;
  padding:28px 0 0;border-top:1px solid var(--line);
}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--primary-deep);
  border-radius:18px;
  padding:38px 40px;
  margin:8px 0 72px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band::after{
  content:"› › ›";
  position:absolute;right:24px;bottom:-14px;
  font-family:var(--mono);font-size:70px;color:#fff;opacity:.06;letter-spacing:-6px;
  pointer-events:none;
}
.cta-band h2{color:#fff;font-size:26px;margin-bottom:8px;}
.cta-band p{color:rgba(255,255,255,.78);font-size:14.5px;max-width:560px;}
.cta-band .btn-main{background:var(--accent);color:var(--ink);border-color:var(--accent);}
.cta-band .btn-main:hover{background:#c8f23c;border-color:#c8f23c;color:var(--ink);}
.cta-band .btn-ghost{color:#fff;border-color:rgba(255,255,255,.5);}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--primary-deep);
  color:rgba(255,255,255,.82);
  padding:64px 0 26px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
  border-bottom:1px solid rgba(255,255,255,.14);
}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  color:#fff;font-weight:700;font-size:17px;margin-bottom:16px;
}
.footer-brand .brand-mark{background:rgba(255,255,255,.14);color:var(--accent);}
.footer-about{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);margin-bottom:14px;}
.footer-contact{font-size:13.5px;color:var(--accent);font-family:var(--mono);}
.site-footer h3{
  color:#fff;font-size:14.5px;font-weight:500;margin-bottom:16px;letter-spacing:0;
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:rgba(255,255,255,.76);transition:.2s ease;}
.footer-links a:hover{color:var(--accent);transform:translateX(2px);}
.footer-meta{font-size:13.5px;line-height:1.9;color:rgba(255,255,255,.72);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:22px;font-size:13px;color:rgba(255,255,255,.62);
}
.back-top{color:rgba(255,255,255,.82);font-family:var(--mono);font-size:13px;}
.back-top:hover{color:var(--accent);}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .article-head h1{font-size:38px;}
}
@media (max-width:991.98px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:40px;padding-top:24px;}
  .article-aside{display:none;}
  .article-body h2{font-size:23px;}
  .article-body h3{font-size:18px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{padding:30px 26px;}
  .nav-link{padding:20px 9px;font-size:14.5px;}
  .command-search{min-width:180px;}
  .main-nav{
    position:fixed;top:64px;right:0;
    width:300px;max-width:86vw;
    height:calc(100vh - 64px);
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--surface);
    border-left:1px solid var(--line);
    box-shadow:var(--shadow-2);
    padding:20px 16px;
    transform:translateX(105%);
    transition:transform .28s ease;
    overflow-y:auto;
    z-index:1040;
  }
  .main-nav.is-open{transform:translateX(0);}
  .nav-link{padding:14px 12px;border-radius:10px;font-size:15.5px;}
  .nav-link::after{left:12px;right:auto;width:18px;bottom:8px;}
  .nav-link:hover{background:var(--paper);}
  .menu-btn{display:inline-flex;}
  .icon-btn{display:none;}
}
@media (max-width:767.98px){
  .container{padding:0 18px;}
  .brand-text{display:none;}
  .brand-short{display:inline;}
  .command-search{display:none;}
  .article-head h1{font-size:30px;letter-spacing:-.3px;}
  .article-body{font-size:15.5px;padding-top:26px;}
  .article-body h2{font-size:22px;}
  .card-grid{grid-template-columns:minmax(0,1fr);}
  .section-head h2{font-size:23px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-band h2{font-size:21px;}
  .crumb li[aria-current="page"]{max-width:220px;}
}
@media (max-width:520px){
  .article-head h1{font-size:27px;}
  .article-actions .btn-main,.article-actions .btn-ghost{width:100%;}
  .cta-band{flex-direction:column;align-items:flex-start;}
  .cta-band .btn-main,.cta-band .btn-ghost{width:100%;}
}

/* roulang page: category1 */
:root{
  --ink:#14171A;
  --ink-soft:#3C4441;
  --muted:#6B7370;
  --paper:#F6F7F3;
  --surface:#FFFFFF;
  --line:#E2E5DE;
  --primary:#0F6E5C;
  --primary-deep:#0A4E42;
  --primary-soft:#E6F2EE;
  --accent:#D6FF4B;
  --warn:#C2410C;
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,"SF Mono",Consolas,"Liberation Mono",monospace;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-input:10px;
  --shadow-1:0 1px 2px rgba(20,23,26,.06);
  --shadow-2:0 10px 28px -14px rgba(20,23,26,.24);
  --bs-primary-rgb:15,110,92;
  --bs-body-bg:#F6F7F3;
  --bs-body-color:#14171A;
  --bs-border-radius:14px;
  --bs-border-color:#E2E5DE;
  --bs-link-color:#0F6E5C;
  --bs-link-hover-color:#0A4E42;
  --bs-font-sans-serif:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .18s ease,opacity .18s ease}
a:hover{color:var(--primary-deep)}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
  box-shadow:0 0 0 3px rgba(15,110,92,.25);
  border-radius:8px;
}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;color:var(--ink)}
p{margin:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1050;
  background:rgba(246,247,243,.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{
  background:rgba(246,247,243,.96);
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-1);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand:hover{text-decoration:none}
.brand-mark{
  font-family:var(--font-mono);
  font-size:13.5px;font-weight:700;letter-spacing:.02em;
  background:var(--accent);color:var(--ink);
  border-radius:8px;padding:4px 8px;line-height:1.2;
}
.brand-text{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.01em}
.brand-short{display:none;font-size:15px;font-weight:700;color:var(--ink)}
.main-nav{display:flex;align-items:center;gap:26px;flex:1 1 auto;justify-content:center}
.nav-link{
  position:relative;
  font-size:14.5px;color:var(--ink-soft);
  padding:6px 0;
  border-bottom:2px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.nav-link:hover{color:var(--primary);border-bottom-color:rgba(15,110,92,.35);text-decoration:none}
.nav-link.active{color:var(--primary);font-weight:500;border-bottom-color:var(--primary)}
.nav-right{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.command-search{
  display:flex;align-items:center;gap:8px;
  height:38px;width:262px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-input);
  padding:0 8px 0 12px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.command-search:focus-within{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(15,110,92,.22);
}
.command-search .prompt{font-family:var(--font-mono);color:var(--primary);font-weight:700;font-size:14px}
.command-search input{
  flex:1 1 auto;min-width:0;
  border:0;background:transparent;outline:none;
  font-size:13.5px;color:var(--ink);font-family:var(--font-sans);
}
.command-search input::placeholder{color:var(--muted)}
.command-search kbd{
  font-family:var(--font-mono);font-size:11.5px;color:var(--muted);
  background:var(--paper);border:1px solid var(--line);border-radius:6px;
  padding:1px 6px;line-height:1.5;
}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:var(--radius-input);
  border:1px solid var(--line);background:var(--surface);color:var(--primary);
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.icon-btn:hover{background:var(--primary-soft);border-color:rgba(15,110,92,.4);color:var(--primary-deep);transform:translateY(-1px)}
.icon-btn:active{transform:translateY(0)}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--primary);color:#fff;font-weight:500;font-size:15px;
  border:0;border-radius:var(--radius-btn);
  padding:.78rem 1.35rem;cursor:pointer;
  transition:background .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-main:hover{background:#0C5D4E;color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);text-decoration:none}
.btn-main:active{transform:translateY(0);background:var(--primary-deep)}
.btn-main.btn-sm{padding:.5rem 1rem;font-size:13.5px}
.btn-line{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;color:var(--primary);font-weight:500;font-size:15px;
  border:1.5px solid var(--primary);border-radius:var(--radius-btn);
  padding:.72rem 1.3rem;cursor:pointer;
  transition:background .18s ease,color .18s ease,transform .18s ease;
}
.btn-line:hover{background:rgba(15,110,92,.08);color:var(--primary-deep);transform:translateY(-1px);text-decoration:none}
.btn-line:active{transform:translateY(0)}
.menu-btn{
  display:none;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:var(--radius-input);
  border:1px solid var(--line);background:var(--surface);color:var(--ink);
  cursor:pointer;transition:background .18s ease,border-color .18s ease;
}
.menu-btn:hover{background:var(--primary-soft);border-color:rgba(15,110,92,.4)}

/* ---------- drawer ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(20,23,26,.45);z-index:1060}
.nav-drawer{
  position:fixed;top:0;right:0;z-index:1070;
  width:min(88vw,340px);height:100%;
  background:var(--surface);
  box-shadow:-16px 0 40px -20px rgba(20,23,26,.4);
  transform:translateX(102%);
  transition:transform .28s ease;
  padding:20px;overflow-y:auto;
  display:flex;flex-direction:column;gap:18px;
}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;gap:10px}
.drawer-brand{font-weight:700;font-size:15px;flex:1 1 auto}
.drawer-close{
  width:34px;height:34px;border-radius:9px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink-soft);cursor:pointer;
  transition:background .18s ease,color .18s ease;
}
.drawer-close:hover{background:var(--primary-soft);color:var(--primary-deep)}
.drawer-search{width:100%}
.drawer-nav{display:flex;flex-direction:column;gap:4px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:10px 0}
.drawer-nav .nav-link{font-size:15px;padding:10px 0;border-bottom:0;border-left:3px solid transparent;padding-left:12px}
.drawer-nav .nav-link.active{border-left-color:var(--primary);background:var(--primary-soft);border-radius:8px}
.drawer-cta{width:100%}
body.drawer-open{overflow:hidden}

/* ---------- hero ---------- */
.cat-hero{
  position:relative;
  padding:64px 0 56px;
  background-color:var(--primary-soft);
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(246,247,243,.97) 0%,rgba(246,247,243,.9) 52%,rgba(246,247,243,.62) 100%);
}
.cat-hero .container{position:relative;z-index:1}
.crumb{margin-bottom:22px}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted)}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li+li::before{content:"›";font-family:var(--font-mono);color:var(--muted)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}
.crumb li[aria-current] span,.crumb li[aria-current]{color:var(--ink-soft)}
.cat-hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:48px;align-items:center}
.eyebrow{
  display:inline-block;font-family:var(--font-mono);font-size:13px;
  color:var(--primary);letter-spacing:.04em;margin-bottom:14px;
  background:rgba(214,255,75,.5);border-radius:999px;padding:4px 12px;
}
.cat-hero h1{font-size:44px;letter-spacing:-.01em}
.hero-sub{margin-top:14px;font-size:19px;color:var(--ink-soft);font-weight:500;line-height:1.6}
.hero-desc{margin-top:14px;font-size:15.5px;color:var(--muted);max-width:56ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-2);
  overflow:hidden;
}
.hero-panel img{width:100%;aspect-ratio:16/10;object-fit:cover;border-bottom:1px solid var(--line)}
.panel-list{padding:8px 20px 16px}
.panel-list li{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding:12px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--ink-soft);
}
.panel-list li:last-child{border-bottom:0}
.panel-list b{font-family:var(--font-mono);font-size:18px;color:var(--primary);font-feature-settings:"tnum"}

/* ---------- metrics ---------- */
.metrics{background:var(--surface);border-bottom:1px solid var(--line)}
.metric-row{display:grid;grid-template-columns:repeat(4,1fr)}
.metric-row li{
  padding:26px 24px;border-left:1px solid var(--line);
}
.metric-row li:first-child{border-left:0;padding-left:0}
.metric-row b{display:block;font-family:var(--font-mono);font-size:30px;font-weight:700;color:var(--ink);font-feature-settings:"tnum";line-height:1.2}
.metric-row b .unit{font-size:15px;margin-left:3px;color:var(--muted)}
.metric-row span{display:block;margin-top:6px;font-size:13.5px;color:var(--muted)}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:30px;margin-bottom:12px}
.section-head p{color:var(--muted);font-size:15.5px}
.tag-line{
  display:inline-block;font-family:var(--font-mono);font-size:13px;color:var(--primary);
  margin-bottom:10px;letter-spacing:.03em;
}

/* ---------- content grid ---------- */
.content-grid{display:grid;grid-template-columns:264px minmax(0,1fr);gap:48px;align-items:start}
.side-toc{position:sticky;top:88px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:22px;box-shadow:var(--shadow-1)}
.toc-title{font-size:14px;font-family:var(--font-mono);color:var(--muted);font-weight:500;letter-spacing:.04em;margin-bottom:14px}
.side-toc nav{display:flex;flex-direction:column;gap:2px}
.side-toc nav a{
  display:block;font-size:14.5px;color:var(--ink-soft);
  padding:9px 12px;border-radius:9px;border-left:3px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.side-toc nav a:hover{background:var(--primary-soft);color:var(--primary-deep);border-left-color:var(--primary);text-decoration:none}
.toc-note{margin-top:16px;padding-top:16px;border-top:1px dashed var(--line);font-size:13px;color:var(--muted);line-height:1.7}
.clist{display:flex;flex-direction:column;gap:56px}
.group h2{
  font-size:23px;margin-bottom:6px;
  display:flex;align-items:center;gap:10px;
}
.group h2::before{content:"[";font-family:var(--font-mono);color:var(--primary);font-weight:400}
.group h2::after{content:"]";font-family:var(--font-mono);color:var(--primary);font-weight:400}
.group > p{color:var(--muted);font-size:14.5px;margin-bottom:18px}
.line-item{
  display:flex;gap:20px;
  padding:24px 0;
  border-top:1px solid var(--line);
  transition:background .18s ease;
}
.line-item:last-child{border-bottom:1px solid var(--line)}
.line-item:hover .line-no{background:var(--primary);color:#fff}
.line-no{
  flex:0 0 auto;
  font-family:var(--font-mono);font-size:13.5px;font-weight:700;font-feature-settings:"tnum";
  background:var(--accent);color:var(--ink);
  border-radius:8px;padding:6px 10px;height:fit-content;
  transition:background .2s ease,color .2s ease;
}
.line-item h3{font-size:18px;font-weight:500;margin-bottom:8px}
.line-item p{font-size:15px;color:var(--ink-soft);line-height:1.8}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:12px;font-size:14px;color:var(--primary);font-weight:500;
}
.text-link::before{content:"›";font-family:var(--font-mono);font-weight:700}
.text-link:hover{text-decoration:underline}

/* ---------- shapes ---------- */
.shapes{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.shape-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.shape-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);display:flex;flex-direction:column;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.shape-card:hover{border-color:rgba(15,110,92,.4);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.shape-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--paper)}
.shape-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.badge-cat{
  align-self:flex-start;
  font-size:12.5px;font-weight:500;
  background:var(--accent);color:var(--ink);
  border-radius:999px;padding:3px 11px;
}
.shape-body h3{font-size:18px;font-weight:500}
.shape-body p{font-size:14.5px;color:var(--muted);line-height:1.75}
.shape-body .text-link{margin-top:auto;padding-top:6px}

/* ---------- flow ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
.flow-step{
  position:relative;
  padding:30px 24px 30px 0;
  border-right:1px dashed var(--line);
}
.flow-step:last-child{border-right:0}
.flow-no{
  display:inline-block;font-family:var(--font-mono);font-size:13px;font-weight:700;
  color:var(--primary);background:var(--primary-soft);
  border-radius:8px;padding:4px 10px;margin-bottom:14px;
}
.flow-step h3{font-size:17px;font-weight:500;margin-bottom:8px}
.flow-step p{font-size:14.5px;color:var(--muted)}
.flow-dot{
  position:absolute;top:-5px;left:0;width:9px;height:9px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 0 4px rgba(15,110,92,.14);
}

/* ---------- faq ---------- */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(15,110,92,.4);box-shadow:var(--shadow-1)}
.faq-item[open]{border-left:3px solid var(--primary)}
.faq-item summary{
  display:flex;align-items:flex-start;gap:10px;
  padding:18px 22px;font-size:16px;font-weight:500;color:var(--ink);
  cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:"›";font-family:var(--font-mono);font-weight:700;color:var(--primary);line-height:1.5}
.faq-item .faq-body{padding:0 22px 20px 46px;font-size:14.5px;color:var(--ink-soft);line-height:1.8}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--primary-deep);
  border-radius:var(--radius-card);
  padding:42px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:16px 16px;opacity:.5;pointer-events:none;
}
.cta-band > *{position:relative;z-index:1}
.cta-band h2{color:#fff;font-size:26px;margin-bottom:8px}
.cta-band p{color:rgba(255,255,255,.78);font-size:14.5px;max-width:56ch}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--accent);color:var(--ink);font-weight:700;font-size:15px;
  border:0;border-radius:var(--radius-btn);padding:.8rem 1.4rem;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease;
}
.btn-accent:hover{transform:translateY(-1px);box-shadow:0 12px 26px -14px rgba(0,0,0,.6);color:var(--ink);text-decoration:none}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  background:transparent;color:#fff;font-weight:500;font-size:15px;
  border:1.5px solid rgba(255,255,255,.55);border-radius:var(--radius-btn);
  padding:.72rem 1.3rem;cursor:pointer;
  transition:background .18s ease,border-color .18s ease,transform .18s ease;
}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff;transform:translateY(-1px);text-decoration:none}

/* ---------- footer ---------- */
.site-footer{background:var(--primary-deep);color:#fff;padding:64px 0 24px;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;margin-bottom:14px}
.footer-about{font-size:14px;color:rgba(255,255,255,.76);line-height:1.8;max-width:34ch}
.footer-contact{margin-top:14px;font-size:13.5px;color:rgba(214,255,75,.9);font-family:var(--font-mono)}
.site-footer h3{font-size:15px;color:#fff;margin-bottom:16px;font-weight:500}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.78)}
.footer-links a:hover{color:var(--accent);text-decoration:underline}
.footer-meta{font-size:14px;color:rgba(255,255,255,.78);line-height:2}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.16);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.7);
}
.back-top{font-family:var(--font-mono);font-size:13.5px;color:rgba(255,255,255,.86)}
.back-top:hover{color:var(--accent);text-decoration:underline}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .command-search{width:210px}
}
@media (max-width:991.98px){
  .main-nav{display:none}
  .nav-right .command-search,
  .nav-right .icon-btn,
  .nav-right .btn-main{display:none}
  .menu-btn{display:inline-flex}
  .cat-hero{padding:48px 0 44px}
  .cat-hero-grid{grid-template-columns:1fr;gap:32px}
  .content-grid{grid-template-columns:1fr;gap:32px}
  .side-toc{position:static;padding:18px}
  .side-toc nav{flex-direction:row;overflow-x:auto;gap:8px;padding-bottom:4px}
  .side-toc nav a{white-space:nowrap;border-left:0;border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:13.5px}
  .side-toc nav a:hover{border-color:var(--primary)}
  .toc-note{display:none}
  .shape-grid{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .flow-step{border-right:0;border-bottom:1px dashed var(--line);padding-right:20px}
  .flow-step:nth-child(odd){padding-right:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767.98px){
  .brand-text{display:none}
  .brand-short{display:inline}
  .cat-hero h1{font-size:30px}
  .hero-sub{font-size:17px}
  .metrics{padding:8px 0}
  .metric-row{grid-template-columns:1fr 1fr}
  .metric-row li{padding:18px 16px;border-left:0;border-top:1px solid var(--line)}
  .metric-row li:nth-child(odd){padding-left:0}
  .metric-row li:nth-child(1),.metric-row li:nth-child(2){border-top:0}
  .metric-row b{font-size:24px}
  .section{padding:56px 0}
  .section-head h2{font-size:23px}
  .group h2{font-size:20px}
  .shape-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
  .cta-band{padding:30px 24px;flex-direction:column;align-items:flex-start}
  .site-footer{padding:48px 0 20px;margin-top:64px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .line-item{gap:14px}
}
@media (max-width:575.98px){
  .container{padding-left:18px;padding-right:18px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn-main,.hero-actions .btn-line{width:100%}
  .line-item h3{font-size:16.5px}
  .faq-item summary{font-size:15px;padding:16px 18px}
  .faq-item .faq-body{padding:0 18px 18px 40px}
}

/* roulang page: category2 */
:root{
  --ink:#14171A;
  --ink-soft:#3C4441;
  --muted:#6B7370;
  --paper:#F6F7F3;
  --surface:#FFFFFF;
  --line:#E2E5DE;
  --primary:#0F6E5C;
  --primary-deep:#0A4E42;
  --primary-soft:#E6F2EE;
  --accent:#D6FF4B;
  --warn:#C2410C;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,23,26,.06);
  --sh-2:0 10px 28px -14px rgba(20,23,26,.24);
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:ui-monospace,"SF Mono",Consolas,"Liberation Mono",monospace;
  --bs-primary-rgb:15,110,92;
  --bs-body-bg:#F6F7F3;
  --bs-body-color:#3C4441;
  --bs-border-radius:14px;
  --bs-border-color:#E2E5DE;
  --bs-link-color:#0F6E5C;
  --bs-link-hover-color:#0A4E42;
  --bs-body-font-family:var(--sans);
  --bs-font-sans-serif:var(--sans);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-soft);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease}
a:hover{color:var(--primary-deep)}
button,input,textarea,select{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;box-shadow:0 0 0 3px rgba(15,110,92,.18)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono);font-feature-settings:"tnum"}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,247,243,.9);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease,box-shadow .25s ease,background-color .25s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 20px -16px rgba(20,23,26,.45);background:rgba(246,247,243,.96)}
.nav-wrap{display:flex;align-items:center;gap:22px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:16.5px;letter-spacing:.2px;white-space:nowrap}
.brand:hover{color:var(--primary-deep)}
.brand-mark{
  font-family:var(--mono);font-size:14px;font-weight:700;color:var(--primary);
  background:var(--primary-soft);border:1px solid rgba(15,110,92,.18);
  border-radius:8px;padding:2px 8px;line-height:1.4;
}
.brand-short{display:none;font-family:var(--mono);font-size:14px;letter-spacing:.06em;color:var(--primary-deep)}
.main-nav{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;display:inline-block;padding:8px 13px;border-radius:8px;
  font-size:15px;color:var(--ink-soft);white-space:nowrap;
}
.nav-link:hover{color:var(--primary);background:var(--primary-soft)}
.nav-link.active{color:var(--primary-deep);font-weight:500}
.nav-link.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;background:var(--primary);border-radius:2px;
}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.command-search{
  display:flex;align-items:center;gap:8px;
  height:40px;width:266px;padding:0 10px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-input);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.command-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,110,92,.14)}
.command-search .prompt{font-family:var(--mono);color:var(--primary);font-weight:700;line-height:1}
.command-search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink);
}
.command-search input::placeholder{color:var(--muted)}
.command-search kbd{
  font-family:var(--mono);font-size:11.5px;color:var(--muted);
  background:var(--paper);border:1px solid var(--line);border-bottom-width:2px;
  border-radius:6px;padding:1px 6px;
}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:var(--surface);color:var(--primary);
  transition:transform .2s ease,border-color .2s ease,background-color .2s ease,box-shadow .2s ease;
}
.icon-btn:hover,.icon-btn:focus-visible{border-color:var(--primary);background:var(--primary-soft);transform:translateY(-1px);box-shadow:var(--sh-1)}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 20px;border:1px solid var(--primary);
  background:var(--primary);color:#fff;font-weight:500;font-size:15px;
  border-radius:var(--r-btn);cursor:pointer;
  transition:background-color .2s ease,transform .2s ease,box-shadow .2s ease,color .2s ease;
}
.btn-main:hover,.btn-main:focus-visible{background:var(--primary-deep);border-color:var(--primary-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-main:active{transform:translateY(0);box-shadow:none}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 20px;
  border:1.5px solid var(--primary);background:transparent;color:var(--primary-deep);
  font-weight:500;font-size:15px;border-radius:var(--r-btn);cursor:pointer;
  transition:background-color .2s ease,transform .2s ease,border-color .2s ease;
}
.btn-ghost:hover,.btn-ghost:focus-visible{background:rgba(15,110,92,.08);color:var(--primary-deep);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-main.btn-sm,.btn-ghost.btn-sm{height:36px;padding:0 16px;font-size:14px}
.menu-btn{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:var(--surface);color:var(--ink);
  cursor:pointer;transition:border-color .2s ease,background-color .2s ease;
}
.menu-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,23,26,.42);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:1040;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;height:100%;width:308px;max-width:88vw;
  background:var(--surface);z-index:1050;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.4,0,.2,1);
  padding:22px 20px 28px;overflow-y:auto;
  box-shadow:-12px 0 40px -24px rgba(20,23,26,.5);
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-head span{font-weight:700;color:var(--ink)}
.drawer-close{
  width:36px;height:36px;border-radius:9px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink-soft);cursor:pointer;
}
.drawer-close:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}
.drawer-search{
  display:flex;align-items:center;gap:8px;height:44px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--r-input);background:var(--paper);margin-bottom:18px;
}
.drawer-search input{flex:1;border:0;background:transparent;outline:none;font-size:14.5px}
.drawer-search .prompt{font-family:var(--mono);color:var(--primary);font-weight:700}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:20px}
.drawer-nav a{
  padding:12px 14px;border-radius:10px;color:var(--ink-soft);font-size:15.5px;
  border:1px solid transparent;
}
.drawer-nav a:hover{background:var(--primary-soft);color:var(--primary-deep);border-color:rgba(15,110,92,.2)}
.drawer-nav a.active{background:var(--primary-soft);color:var(--primary-deep);font-weight:500;border-color:rgba(15,110,92,.28)}
.mobile-drawer .btn-main{width:100%}

/* ============ 页头 ============ */
.page-head{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(96deg,rgba(10,78,66,.95) 0%,rgba(15,110,92,.82) 52%,rgba(10,78,66,.9) 100%),
             url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  padding:64px 0 60px;
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.08;
  background-image:radial-gradient(rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:22px 22px;
}
.page-head .container{position:relative;z-index:2}
.breadcrumb-line{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:rgba(255,255,255,.74);margin-bottom:20px;
}
.breadcrumb-line a{color:rgba(255,255,255,.86)}
.breadcrumb-line a:hover{color:var(--accent)}
.breadcrumb-line .sep{font-family:var(--mono);color:rgba(255,255,255,.55)}
.breadcrumb-line .current{color:rgba(255,255,255,.96)}
.head-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:center}
.page-head h1{
  font-size:44px;line-height:1.25;font-weight:700;color:#fff;margin:0 0 16px;letter-spacing:.4px;
}
.page-lead{
  font-size:16.5px;line-height:1.8;color:rgba(255,255,255,.87);max-width:640px;margin:0 0 22px;
}
.head-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.head-tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 13px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.2);
  font-size:13px;color:rgba(255,255,255,.94);
}
.head-tag.accent{background:var(--accent);border-color:var(--accent);color:var(--ink);font-weight:500}
.head-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block}
.head-actions{display:flex;flex-wrap:wrap;gap:12px}
.btn-onDark{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  background:#fff;color:var(--primary-deep);border:1px solid #fff;
  font-weight:500;font-size:15px;cursor:pointer;
  transition:transform .2s ease,background-color .2s ease,box-shadow .2s ease;
}
.btn-onDark:hover,.btn-onDark:focus-visible{background:var(--accent);border-color:var(--accent);color:var(--ink);transform:translateY(-1px);box-shadow:0 12px 26px -16px rgba(0,0,0,.6)}
.btn-onDark:active{transform:translateY(0)}
.btn-ghost-light{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  background:rgba(255,255,255,.08);color:#fff;border:1.5px solid rgba(255,255,255,.62);
  font-weight:500;font-size:15px;cursor:pointer;
  transition:background-color .2s ease,transform .2s ease,color .2s ease;
}
.btn-ghost-light:hover,.btn-ghost-light:focus-visible{background:rgba(255,255,255,.18);color:#fff;transform:translateY(-1px)}
.head-panel{
  background:rgba(9,32,28,.62);border:1px solid rgba(255,255,255,.16);
  border-radius:var(--r-card);padding:22px;backdrop-filter:blur(6px);
}
.head-panel .panel-label{
  font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;
  color:rgba(255,255,255,.7);display:block;margin-bottom:10px;
}
.head-panel .panel-num{font-family:var(--mono);font-size:38px;font-weight:700;color:#fff;line-height:1}
.head-panel .panel-num small{font-size:15px;font-weight:400;color:rgba(255,255,255,.75);margin-left:6px}
.head-panel ul{list-style:none;margin:16px 0 0;padding:0;border-top:1px solid rgba(255,255,255,.16);padding-top:14px}
.head-panel li{
  display:flex;align-items:center;gap:8px;font-size:13.5px;color:rgba(255,255,255,.82);padding:3px 0;
}
.head-panel li::before{content:"›";font-family:var(--mono);color:var(--accent);font-weight:700}

/* ============ 通用板块 ============ */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-surface{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-dark{background:var(--ink);color:rgba(255,255,255,.82)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:13px;letter-spacing:.06em;
  color:var(--primary);margin-bottom:12px;
}
.section-dark .eyebrow{color:var(--accent)}
.section-title{font-size:30px;line-height:1.32;font-weight:700;color:var(--ink);margin:0 0 14px}
.section-dark .section-title{color:#fff}
.section-sub{font-size:15.5px;line-height:1.8;color:var(--muted);margin:0}
.section-dark .section-sub{color:rgba(255,255,255,.72)}
.head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.head-row .section-head{margin-bottom:0}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;color:var(--primary);font-weight:500;white-space:nowrap;
}
.text-link::after{content:"›";font-family:var(--mono);transition:transform .2s ease}
.text-link:hover{color:var(--primary-deep);text-decoration:underline;text-underline-offset:4px}
.text-link:hover::after{transform:translateX(3px)}

/* ============ 状态条 ============ */
.strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--ink);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);
}
.strip-item{padding:26px 24px;border-left:1px solid rgba(255,255,255,.1)}
.strip-item:first-child{border-left:0}
.strip-num{
  font-family:var(--mono);font-size:30px;font-weight:700;color:var(--accent);
  line-height:1.1;display:flex;align-items:baseline;gap:6px;
}
.strip-num small{font-size:14px;font-weight:400;color:rgba(255,255,255,.66)}
.strip-label{font-size:15px;color:#fff;font-weight:500;margin:10px 0 4px}
.strip-desc{font-size:13.5px;color:rgba(255,255,255,.62);line-height:1.7;margin:0}
.strip-note{
  display:flex;align-items:center;gap:8px;margin-top:18px;font-size:13.5px;color:var(--muted);
}
.strip-note .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(214,255,75,.18);display:inline-block}

/* ============ 对比表格 ============ */
.table-wrap{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--surface);overflow-x:auto;box-shadow:var(--sh-1);
  -webkit-overflow-scrolling:touch;
}
table.compare{width:100%;min-width:820px;border-collapse:separate;border-spacing:0;font-size:15px}
table.compare thead th{
  position:sticky;top:0;z-index:2;
  background:var(--primary-soft);color:var(--primary-deep);
  font-weight:700;font-size:14.5px;text-align:left;
  padding:16px 20px;border-bottom:1px solid var(--line);white-space:nowrap;
}
table.compare thead th:first-child{border-top-left-radius:13px}
table.compare thead th:last-child{border-top-right-radius:13px}
table.compare thead th .col-tag{
  display:inline-block;margin-left:8px;padding:2px 9px;border-radius:var(--r-pill);
  background:var(--accent);color:var(--ink);font-size:12px;font-weight:500;vertical-align:middle;
  font-family:var(--sans);
}
table.compare th.is-featured{border-top:3px solid var(--accent)}
table.compare td{
  padding:16px 20px;border-top:1px solid var(--line);color:var(--ink-soft);vertical-align:top;line-height:1.7;
}
table.compare tbody th{
  padding:16px 20px;border-top:1px solid var(--line);text-align:left;
  font-weight:500;color:var(--ink);background:var(--surface);white-space:nowrap;
}
table.compare tbody tr:hover td,table.compare tbody tr:hover th{background:var(--paper)}
table.compare td.is-featured{background:rgba(230,242,238,.55)}
table.compare tbody tr:hover td.is-featured{background:rgba(230,242,238,.85)}
.mark-yes{color:var(--primary);font-weight:700;font-family:var(--mono)}
.mark-no{color:var(--muted);font-family:var(--mono)}
.table-foot{
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
  margin-top:18px;font-size:13.5px;color:var(--muted);
}
.table-foot .mono{color:var(--ink-soft)}

/* ============ 双列对比卡片 ============ */
.vs-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.vs-col{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-1);
}
.vs-col.is-alt{border-color:rgba(15,110,92,.32);background:linear-gradient(180deg,rgba(230,242,238,.5),#fff 42%)}
.vs-col-head{display:flex;align-items:center;gap:12px;margin-bottom:8px}
.vs-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:500;
  background:var(--primary-soft);color:var(--primary-deep);border:1px solid rgba(15,110,92,.2);
}
.vs-badge.warnish{background:#FBEDE6;color:var(--warn);border-color:rgba(194,65,12,.22)}
.vs-col h3{font-size:20px;font-weight:700;color:var(--ink);margin:0 0 8px;line-height:1.4}
.vs-col p.vs-intro{font-size:14.5px;color:var(--muted);margin:0 0 20px;line-height:1.75}
.vs-item{
  display:block;border:1px solid var(--line);border-radius:12px;overflow:hidden;
  background:var(--surface);margin-bottom:16px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.vs-item:last-child{margin-bottom:0}
.vs-item:hover{transform:translateY(-2px);border-color:rgba(15,110,92,.4);box-shadow:var(--sh-2)}
.vs-item img{width:100%;aspect-ratio:16/10;object-fit:cover;background:#ECEEE9}
.vs-item-body{padding:18px 20px 20px}
.vs-item-body h4{font-size:17px;font-weight:500;color:var(--ink);margin:0 0 8px;line-height:1.45}
.vs-item-body p{font-size:14.5px;color:var(--muted);margin:0 0 12px;line-height:1.75}
.vs-points{list-style:none;margin:0 0 14px;padding:0}
.vs-points li{
  position:relative;padding-left:18px;font-size:13.5px;color:var(--ink-soft);line-height:1.7;
}
.vs-points li::before{
  content:"›";position:absolute;left:0;top:0;font-family:var(--mono);color:var(--primary);font-weight:700;
}
.vs-item .text-link{font-size:14px}

/* ============ 误判对照 ============ */
.myth-list{display:grid;gap:14px}
.myth-item{
  display:grid;grid-template-columns:minmax(0,1fr) 40px minmax(0,1.25fr);
  align-items:center;gap:20px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 26px;transition:border-color .22s ease,box-shadow .22s ease,transform .22s ease;
}
.myth-item:hover{border-color:rgba(15,110,92,.36);box-shadow:var(--sh-2);transform:translateY(-2px)}
.myth-from{font-size:15.5px;color:var(--ink);font-weight:500;line-height:1.6}
.myth-from span{
  display:block;font-family:var(--mono);font-size:12.5px;color:var(--muted);
  letter-spacing:.06em;margin-bottom:6px;font-weight:400;
}
.myth-arrow{
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:20px;color:var(--primary);
}
.myth-to{font-size:14.5px;color:var(--ink-soft);line-height:1.75;border-left:3px solid var(--primary);padding-left:18px}

/* ============ FAQ ============ */
.faq{max-width:800px;margin:0 auto}
.faq details{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq details:hover{border-color:rgba(15,110,92,.32)}
.faq details[open]{border-color:rgba(15,110,92,.42);box-shadow:var(--sh-1)}
.faq summary{
  display:flex;align-items:flex-start;gap:10px;
  padding:18px 22px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:500;color:var(--ink);line-height:1.6;
  box-shadow:inset 0 0 0 var(--primary);
  transition:box-shadow .2s ease,background-color .2s ease;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{
  content:"›";font-family:var(--mono);color:var(--primary);font-weight:700;font-size:17px;line-height:1.5;
  transition:transform .2s ease;display:inline-block;
}
.faq details[open] summary{box-shadow:inset 3px 0 0 var(--primary);background:rgba(230,242,238,.42)}
.faq details[open] summary::before{transform:rotate(90deg)}
.faq summary:hover{background:rgba(230,242,238,.35)}
.faq-body{padding:0 22px 20px 49px;font-size:15px;color:var(--muted);line-height:1.85}

/* ============ CTA 横条 ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:linear-gradient(100deg,#0A4E42 0%,#0F6E5C 100%);
  color:#fff;border-radius:18px;padding:44px 48px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
  box-shadow:var(--sh-2);
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.08;
  background-image:radial-gradient(rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:22px 22px;
}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{font-size:26px;font-weight:700;color:#fff;margin:0 0 10px;line-height:1.35}
.cta-band p{margin:0;font-size:15px;color:rgba(255,255,255,.8);max-width:640px;line-height:1.75}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{background:var(--primary-deep);color:rgba(255,255,255,.78);padding:64px 0 26px;margin-top:0;position:relative}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background-image:linear-gradient(90deg,rgba(255,255,255,.34) 0 8px,transparent 8px 16px);
  background-size:16px 1px;opacity:.5;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(214,255,75,.16);border-color:rgba(214,255,75,.34);color:var(--accent)}
.footer-about{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.72);margin:0 0 14px;max-width:340px}
.footer-contact{font-family:var(--mono);font-size:13.5px;color:rgba(255,255,255,.84);margin:0}
.site-footer h3{font-size:15px;color:#fff;font-weight:500;margin:0 0 16px;letter-spacing:.3px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14.5px;color:rgba(255,255,255,.74);display:inline-block;width:fit-content}
.footer-links a:hover{color:var(--accent);transform:translateX(2px)}
.footer-meta{font-size:14px;line-height:2;color:rgba(255,255,255,.7);margin:0}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.16);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13.5px;color:rgba(255,255,255,.66);
}
.back-top{
  display:inline-flex;align-items:center;gap:6px;font-size:13.5px;color:rgba(255,255,255,.8);
  padding:6px 12px;border-radius:var(--r-pill);border:1px solid rgba(255,255,255,.2);
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.back-top:hover{color:var(--accent);border-color:rgba(214,255,75,.6);background:rgba(214,255,75,.1)}

/* ============ 响应式 ============ */
@media (max-width:1200px){
  .head-grid{grid-template-columns:minmax(0,1fr) 280px;gap:32px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
}
@media (max-width:992px){
  .main-nav{display:none}
  .command-search{display:none}
  .icon-btn{display:none}
  .nav-right .btn-main{display:none}
  .menu-btn{display:inline-flex}
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
  .head-grid{grid-template-columns:1fr;gap:28px}
  .head-panel{max-width:420px}
  .page-head h1{font-size:34px}
  .section-title{font-size:25px}
  .strip{grid-template-columns:1fr 1fr}
  .strip-item:nth-child(3){border-left:0;border-top:1px solid rgba(255,255,255,.1)}
  .strip-item:nth-child(4){border-top:1px solid rgba(255,255,255,.1)}
  .vs-grid{grid-template-columns:1fr}
  .myth-item{grid-template-columns:1fr;gap:12px;align-items:start}
  .myth-arrow{justify-content:flex-start}
  .cta-band{padding:34px 28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .brand-text{display:none}
  .brand-short{display:inline-block}
  .page-head{padding:48px 0 44px}
  .page-head h1{font-size:29px}
  .page-lead{font-size:15.5px}
  .head-panel{padding:18px}
  .head-panel .panel-num{font-size:31px}
  .section{padding:56px 0}
  .section-tight{padding:48px 0}
  .section-title{font-size:23px}
  .head-row{flex-direction:column;align-items:flex-start;gap:14px}
  .strip{grid-template-columns:1fr}
  .strip-item{border-left:0;border-top:1px solid rgba(255,255,255,.1);padding:22px 20px}
  .strip-item:first-child{border-top:0}
  .vs-col{padding:20px}
  .myth-item{padding:20px}
  .myth-to{padding-left:14px}
  .faq summary{padding:16px 18px;font-size:15.5px}
  .faq-body{padding:0 18px 18px 42px}
  .cta-band{padding:28px 22px;border-radius:14px}
  .cta-band h2{font-size:21px}
  .cta-actions .btn-onDark,.cta-actions .btn-ghost-light{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .page-head h1{font-size:26px}
  .head-actions .btn-onDark,.head-actions .btn-ghost-light{width:100%}
  .head-tag{font-size:12.5px}
  .table-foot{flex-direction:column;align-items:flex-start;gap:8px}
}

/* roulang page: category3 */
:root{
  --ink:#14171A;
  --ink-soft:#3C4441;
  --muted:#6B7370;
  --paper:#F6F7F3;
  --surface:#FFFFFF;
  --line:#E2E5DE;
  --primary:#0F6E5C;
  --primary-deep:#0A4E42;
  --primary-soft:#E6F2EE;
  --accent:#D6FF4B;
  --warn:#C2410C;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-input:10px;
  --radius-badge:999px;
  --shadow-1:0 1px 2px rgba(20,23,26,.06);
  --shadow-2:0 10px 28px -14px rgba(20,23,26,.24);
  --mono:ui-monospace,"SF Mono",Consolas,"Liberation Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --bs-primary-rgb:15,110,92;
  --bs-body-bg:#F6F7F3;
  --bs-body-color:#14171A;
  --bs-border-color:#E2E5DE;
  --bs-border-radius:10px;
  --bs-link-color:#0F6E5C;
  --bs-link-hover-color:#0A4E42;
  --bs-font-sans-serif:var(--sans);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease}
a:hover{color:var(--primary-deep)}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;box-shadow:0 0 0 3px rgba(15,110,92,.18)}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-family:var(--mono);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}

/* ============ 按钮 ============ */
.btn-main,.btn-ghost,.btn-accent,.btn-outline{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:500;line-height:1;cursor:pointer;
  border:1px solid transparent;transition:transform .18s ease,background-color .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease;
}
.btn-main{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-main:hover{background:var(--primary-deep);border-color:var(--primary-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-main:active{transform:translateY(0);background:var(--primary-deep)}
.btn-outline{background:transparent;border:1.5px solid var(--primary);color:var(--primary-deep)}
.btn-outline:hover{background:var(--primary-soft);border-color:var(--primary);color:var(--primary-deep);transform:translateY(-1px)}
.btn-accent{background:var(--accent);border-color:var(--accent);color:var(--ink)}
.btn-accent:hover{background:#c9f23f;border-color:#c9f23f;color:var(--ink);transform:translateY(-1px);box-shadow:0 12px 26px -14px rgba(0,0,0,.5)}
.btn-ghost{background:transparent;border:1.5px solid rgba(255,255,255,.62);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:#fff;color:#fff;transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:500;font-size:14.5px}
.btn-text::after{content:'›';font-family:var(--mono);transition:transform .18s ease}
.btn-text:hover{color:var(--primary-deep);text-decoration:underline;text-underline-offset:4px}
.btn-text:hover::after{transform:translateX(3px)}

/* ============ 徽章 / 标签 ============ */
.badge-cat{display:inline-flex;align-items:center;gap:6px;padding:3px 11px;border-radius:var(--radius-badge);background:var(--accent);color:var(--ink);font-size:12.5px;font-weight:500;line-height:1.7}
.badge-state{display:inline-flex;align-items:center;gap:6px;padding:3px 11px;border-radius:var(--radius-badge);background:var(--primary-soft);color:var(--primary);font-size:12.5px;font-weight:500;line-height:1.7}
.badge-line{display:inline-flex;align-items:center;gap:6px;padding:3px 11px;border-radius:var(--radius-badge);border:1px solid var(--line);color:var(--muted);font-size:12.5px;line-height:1.7}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,247,243,.9);
  backdrop-filter:saturate(160%) blur(10px);
  -webkit-backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-1);background:rgba(255,255,255,.94)}
.nav-wrap{display:flex;align-items:center;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:17px;letter-spacing:-.2px;flex:0 0 auto}
.brand:hover{color:var(--primary-deep)}
.brand-mark{
  display:inline-grid;place-items:center;width:32px;height:32px;border-radius:9px;
  background:var(--primary);color:var(--accent);font-family:var(--mono);font-size:15px;font-weight:700;line-height:1;
}
.brand-short{display:none;font-family:var(--mono);font-size:15px;color:var(--primary-deep)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-link{position:relative;padding:9px 13px;border-radius:8px;font-size:15px;font-weight:500;color:var(--ink-soft)}
.nav-link:hover{color:var(--primary);background:var(--primary-soft)}
.nav-link.active{color:var(--primary-deep)}
.nav-link.active::after{content:'';position:absolute;left:13px;right:13px;bottom:1px;height:2px;border-radius:2px;background:var(--primary)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.command-search{
  display:flex;align-items:center;gap:8px;height:40px;min-width:252px;padding:0 10px 0 12px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-input);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.command-search .prompt{font-family:var(--mono);font-weight:700;color:var(--primary)}
.command-search input{flex:1;min-width:0;border:0;outline:0;background:transparent;font-size:14px;color:var(--ink)}
.command-search input::placeholder{color:var(--muted)}
.command-search kbd{
  font-family:var(--mono);font-size:11px;line-height:1;padding:3px 6px;border-radius:6px;
  border:1px solid var(--line);background:var(--paper);color:var(--muted);
}
.command-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,110,92,.15)}
.icon-btn{
  display:grid;place-items:center;width:40px;height:40px;border-radius:var(--radius-btn);
  background:var(--surface);border:1px solid var(--line);color:var(--primary);
}
.icon-btn:hover{border-color:var(--primary);background:var(--primary-soft);color:var(--primary-deep)}
.icon-btn:active{transform:translateY(1px)}
.menu-btn{display:none;place-items:center;width:40px;height:40px;border-radius:var(--radius-btn);background:var(--surface);border:1px solid var(--line);color:var(--primary-deep);cursor:pointer}
.menu-btn:hover{border-color:var(--primary);background:var(--primary-soft)}
.drawer-search,.drawer-cta{display:none}
.nav-backdrop{position:fixed;inset:0;z-index:1025;background:rgba(20,23,26,.42);opacity:0;visibility:hidden;transition:opacity .26s ease,visibility .26s ease}
.nav-backdrop.show{opacity:1;visibility:visible}

/* ============ 页头 ============ */
.page-hero{
  position:relative;overflow:hidden;color:#fff;
  background-color:var(--primary-soft);
  background-image:linear-gradient(104deg,rgba(10,78,66,.95) 0%,rgba(15,110,92,.82) 58%,rgba(15,110,92,.66) 100%),
                   url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  padding:76px 0 68px;
}
.page-hero::after{
  content:'';position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:22px 22px;opacity:.45;
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb-line{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:rgba(255,255,255,.76)}
.breadcrumb-line .sep{font-family:var(--mono);color:rgba(255,255,255,.5)}
.breadcrumb-line a{color:rgba(255,255,255,.88)}
.breadcrumb-line a:hover{color:var(--accent)}
.breadcrumb-line .current{color:#fff}
.hero-title{font-size:44px;letter-spacing:-.6px;margin:18px 0 14px}
.hero-sub{max-width:760px;font-size:17px;color:rgba(255,255,255,.88);margin:0}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-facts{display:flex;flex-wrap:wrap;gap:14px 34px;margin-top:34px;padding-top:24px;border-top:1px solid rgba(255,255,255,.18)}
.hero-fact{display:flex;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.84)}
.hero-fact i{color:var(--accent);font-size:13px}
.hero-fact strong{font-family:var(--mono);font-size:15px;color:#fff;font-weight:700}

/* ============ 板块通用 ============ */
.sec{padding:96px 0}
.sec-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:780px;margin-bottom:42px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:13px;color:var(--primary);letter-spacing:.06em}
.eyebrow::before{content:'[ ]';color:var(--primary);opacity:.7}
.sec-title{font-size:30px;margin:12px 0 12px;letter-spacing:-.4px}
.sec-desc{color:var(--muted);font-size:16px;margin:0}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px}
.sec-head-row .sec-head{margin-bottom:0}

/* ============ 时间轴 ============ */
.timeline{position:relative;padding-left:38px;max-width:940px}
.timeline::before{
  content:'';position:absolute;left:7px;top:10px;bottom:14px;width:0;
  border-left:2px dashed var(--line);
}
.tl-item{position:relative;margin-bottom:20px}
.tl-item:last-child{margin-bottom:0}
.tl-item::before{
  content:'';position:absolute;left:-38px;top:26px;width:16px;height:16px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 0 4px var(--primary-soft);
}
.tl-item.is-done::before{background:var(--accent);box-shadow:0 0 0 4px rgba(214,255,75,.28)}
.tl-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px 26px;box-shadow:var(--shadow-1);
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.tl-card:hover{border-color:rgba(15,110,92,.4);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.tl-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:8px}
.tl-num{
  font-family:var(--mono);font-feature-settings:"tnum";font-size:13px;font-weight:700;
  background:var(--accent);color:var(--ink);border-radius:6px;padding:2px 8px;line-height:1.6;
}
.tl-title{font-size:20px;font-weight:500}
.tl-text{color:var(--ink-soft);font-size:15.5px;margin:0}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

/* ============ 深色核对面板 ============ */
.panel-dark{
  background:var(--ink);color:#E9EDE8;border-radius:18px;padding:44px;
  box-shadow:var(--shadow-2);
}
.panel-dark .panel-eyebrow{font-family:var(--mono);font-size:13px;color:var(--accent);letter-spacing:.06em}
.panel-dark h3{color:#fff;font-size:22px;margin:12px 0 10px}
.panel-dark p{color:rgba(233,237,232,.76);font-size:15.5px;max-width:760px}
.check-list{display:grid;gap:14px;margin-top:28px}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 18px;border-radius:12px;background:rgba(255,255,255,.05);
  border-left:3px solid var(--primary);
  font-size:15px;color:#E9EDE8;
}
.check-list li i{color:var(--accent);margin-top:5px;font-size:13px}
.status-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:34px}
.status-card{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:18px 18px 16px;
}
.status-card .dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--accent);margin-right:8px;vertical-align:middle}
.status-card.is-warn .dot{background:#F97316}
.status-card.is-idle .dot{background:rgba(255,255,255,.45)}
.status-card .st-name{font-size:15px;font-weight:500;color:#fff}
.status-card .st-desc{font-size:13.5px;color:rgba(233,237,232,.72);margin:8px 0 0;line-height:1.7}

/* ============ 等级与周期 ============ */
.split-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:24px;align-items:start}
.media-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.media-card:hover{border-color:rgba(15,110,92,.4);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.media-card .thumb{position:relative;aspect-ratio:16/10;background:var(--primary-soft);overflow:hidden}
.media-card .thumb img{width:100%;height:100%;object-fit:cover}
.media-card .body{padding:24px 26px 26px}
.media-card .body h3{font-size:20px;font-weight:500;margin-bottom:8px}
.media-card .body p{color:var(--muted);font-size:15px;margin-bottom:14px}
.mini-stack{display:grid;gap:16px}
.mini-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px 24px;box-shadow:var(--shadow-1);transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.mini-card:hover{border-color:rgba(15,110,92,.4);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.mini-card h3{font-size:18px;font-weight:500;margin-bottom:8px}
.mini-card p{color:var(--muted);font-size:14.5px;margin-bottom:12px}
.mini-card .kv{display:flex;flex-wrap:wrap;gap:8px}
.feature-lines{display:grid;gap:10px;margin-top:6px}
.feature-lines li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-soft)}
.feature-lines li i{color:var(--primary);margin-top:5px;font-size:12px}

/* ============ 卡点列表 ============ */
.issue-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:40px;align-items:start}
.issue-figure{
  border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);background:var(--primary-soft);
  box-shadow:var(--shadow-1);
}
.issue-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}
.issue-figure figcaption{padding:14px 18px;font-size:13px;color:var(--muted);background:var(--surface);border-top:1px solid var(--line)}
.issue-list{display:grid;gap:0}
.issue-item{display:grid;grid-template-columns:auto 1fr;gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}
.issue-item:first-child{padding-top:0}
.issue-item:last-child{border-bottom:0;padding-bottom:0}
.issue-idx{
  font-family:var(--mono);font-feature-settings:"tnum";font-size:13px;font-weight:700;
  color:var(--primary-deep);background:var(--primary-soft);border-radius:8px;
  width:34px;height:34px;display:grid;place-items:center;
}
.issue-item h3{font-size:17px;font-weight:500;margin-bottom:6px}
.issue-item p{color:var(--muted);font-size:14.5px;margin:0}
.issue-item p .fix{color:var(--primary-deep);font-weight:500}
.issue-item.is-warn .issue-idx{background:#FCEDE4;color:var(--warn)}

/* ============ FAQ ============ */
.faq-list{max-width:800px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(15,110,92,.34);box-shadow:var(--shadow-1)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:10px;
  padding:18px 22px;font-size:16.5px;font-weight:500;color:var(--ink);
  border-left:3px solid transparent;transition:background-color .2s ease,border-color .2s ease,color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:'›';font-family:var(--mono);font-weight:700;color:var(--primary);font-size:18px;line-height:1}
.faq-item summary::after{content:'+';margin-left:auto;font-family:var(--mono);color:var(--muted);font-size:16px}
.faq-item[open] summary{border-left-color:var(--primary);background:var(--primary-soft);color:var(--primary-deep)}
.faq-item[open] summary::after{content:'−';color:var(--primary)}
.faq-body{padding:16px 22px 22px 54px;color:var(--ink-soft);font-size:15.5px;border-top:1px solid var(--line)}

/* ============ CTA 条 ============ */
.cta-band{
  background:var(--primary-deep);border-radius:18px;padding:42px 44px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  position:relative;overflow:hidden;box-shadow:var(--shadow-2);
}
.cta-band::after{
  content:'';position:absolute;right:-60px;top:-60px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(214,255,75,.22),transparent 68%);pointer-events:none;
}
.cta-band .cta-copy{position:relative;z-index:2;max-width:620px}
.cta-band h2{font-size:26px;color:#fff;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.82);font-size:15.5px;margin:0}
.cta-band .cta-actions{position:relative;z-index:2;display:flex;gap:14px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{background:var(--primary-deep);color:rgba(255,255,255,.82);padding:64px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.site-footer h3{font-size:15px;color:#fff;margin-bottom:16px;font-weight:500;letter-spacing:.02em}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16.5px;margin-bottom:14px}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);color:var(--accent)}
.footer-about{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.74);max-width:340px}
.footer-contact{font-family:var(--mono);font-size:13.5px;color:rgba(255,255,255,.7);margin-top:14px}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{color:rgba(255,255,255,.78);font-size:14.5px}
.footer-links a:hover{color:var(--accent)}
.footer-meta{font-size:14px;line-height:2.05;color:rgba(255,255,255,.74)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
  font-size:13.5px;color:rgba(255,255,255,.66);
}
.back-top{color:#fff}
.back-top:hover{color:var(--accent)}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .container{padding:0 22px}
  .command-search{min-width:210px}
  .sec{padding:84px 0}
}
@media (max-width:991.98px){
  .brand-text{display:none}
  .brand-short{display:inline}
  .command-search{display:none}
  .icon-btn{display:none}
  .menu-btn{display:grid}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;z-index:1031;
    width:min(340px,86vw);margin:0;padding:78px 20px 28px;
    display:flex;flex-direction:column;align-items:stretch;gap:6px;
    background:var(--surface);border-left:1px solid var(--line);
    box-shadow:-24px 0 44px -28px rgba(20,23,26,.5);
    transform:translateX(102%);transition:transform .28s ease;overflow-y:auto;
  }
  .main-nav.open{transform:translateX(0)}
  .nav-link{padding:12px 14px;font-size:16px;border-radius:10px}
  .nav-link.active::after{display:none}
  .nav-link.active{background:var(--primary-soft)}
  .main-nav .drawer-search{display:flex;min-width:0;width:100%;margin-bottom:14px}
  .main-nav .drawer-cta{display:inline-flex;width:100%;margin-top:16px}
  .hero-title{font-size:36px}
  .split-grid{grid-template-columns:1fr}
  .issue-wrap{grid-template-columns:1fr;gap:30px}
  .panel-dark{padding:34px}
  .status-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:767.98px){
  .sec{padding:56px 0}
  .page-hero{padding:56px 0 48px}
  .hero-title{font-size:30px;margin:14px 0 12px}
  .hero-sub{font-size:15.5px}
  .sec-title{font-size:23px}
  .sec-head{margin-bottom:30px}
  .panel-dark{padding:26px 22px;border-radius:16px}
  .panel-dark h3{font-size:20px}
  .tl-card{padding:20px 18px}
  .timeline{padding-left:30px}
  .tl-item::before{left:-30px;top:24px;width:14px;height:14px}
  .cta-band{padding:30px 24px;border-radius:16px}
  .cta-band h2{font-size:22px}
  .faq-body{padding:14px 18px 20px 18px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:519.98px){
  .container{padding:0 16px}
  .status-grid{grid-template-columns:1fr}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%}
  .hero-facts{gap:12px 20px}
  .btn-main,.btn-ghost,.btn-accent,.btn-outline{height:46px}
}