/* roulang page: index */
:root{
  --brand:#1E6E8F;--brand-deep:#14536E;--brand-light:#E6F0F5;--brand-line:#CFE1EA;
  --accent:#E07A2F;--accent-hover:#C9681F;--accent-soft:#FDF1E7;--accent-shadow:rgba(224,122,47,.28);
  --success:#2E9E7E;
  --ink:#16303C;--text:#2B3F4A;--muted:#4A6472;--weak:#7C93A1;--note:#2B3F4A;
  --bg:#F6F9FB;--bg-alt:#EDF3F7;--card:#FFFFFF;
  --line:#DCE7EE;--divider:#E8EFF4;--ring:rgba(30,110,143,.28);
  --radius-card:16px;--radius-img:12px;--radius-btn:10px;--radius-badge:6px;
  --shadow-card:0 1px 2px rgba(18,48,61,.06),0 8px 24px -12px rgba(18,48,61,.12);
  --shadow-card-hover:0 2px 4px rgba(18,48,61,.07),0 18px 36px -16px rgba(18,48,61,.18);
  --shadow-nav:0 1px 0 rgba(18,48,61,.06),0 10px 30px -18px rgba(18,48,61,.24);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.85;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
::selection{background:var(--brand-light);color:var(--brand-deep)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:1024px){.container{padding:0 24px}}

.section{padding:56px 0}
@media(min-width:768px){.section{padding:88px 0}}
@media(min-width:1024px){.section{padding:100px 0}}
.section-white{background:#fff}
.section-alt{background:var(--bg-alt)}

.section-head{max-width:780px;margin:0 auto 36px;text-align:center}
@media(min-width:1024px){.section-head{margin-bottom:52px}}
.section-head.left{text-align:left;margin-left:0}
.section-tag{display:inline-block;font-size:13px;font-weight:600;color:var(--brand);background:var(--brand-light);border-radius:var(--radius-badge);padding:3px 10px;margin-bottom:14px}
.section-head h2{font-size:clamp(22px,2.6vw,34px);margin-bottom:12px}
.section-head p{font-size:16px;color:var(--muted);line-height:1.8}

/* ---------- header ---------- */
.site-header{position:absolute;top:0;left:0;right:0;z-index:60;height:72px;
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(14px) saturate(140%);backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(18,48,61,.08);box-shadow:var(--shadow-nav);
  transition:height .22s ease,background .22s ease,box-shadow .22s ease}
.site-header.is-stuck{position:fixed;height:60px;background:#fff;box-shadow:0 1px 0 rgba(18,48,61,.07),0 14px 34px -20px rgba(18,48,61,.34)}
.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:18px}
.logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.logo:hover{color:var(--brand)}
.logo-mark{width:34px;height:34px;border-radius:10px;background:var(--brand-light);border:1px solid var(--brand-line);display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.main-nav{display:none;align-items:center;gap:4px}
@media(min-width:1024px){.main-nav{display:flex}}
.nav-link{position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:var(--muted);border-radius:8px;transition:color .18s ease,background .18s ease}
.nav-link:hover{color:var(--brand);background:rgba(230,240,245,.7)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--accent);border-radius:2px}
.header-actions{display:flex;align-items:center;gap:10px}
.icon-btn{width:40px;height:40px;border-radius:10px;border:1px solid transparent;background:transparent;color:var(--muted);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .18s ease}
.icon-btn:hover{color:var(--brand);background:var(--brand-light);border-color:var(--brand-line)}
.menu-btn{display:flex}
@media(min-width:1024px){.menu-btn{display:none}}
.header-search{position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);
  max-height:0;overflow:hidden;transition:max-height .24s ease}
.site-header.search-open .header-search{max-height:90px}
.header-search .container{padding-top:14px;padding-bottom:14px}
.header-search input{width:100%;height:46px;border:1px solid var(--line);border-radius:10px;padding:0 16px;font-size:15px;color:var(--text);background:#fff}
.header-search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--ring)}

.mobile-drawer{position:fixed;inset:0;background:#fff;z-index:90;display:flex;flex-direction:column;padding:76px 24px 28px;
  transform:translateY(-102%);transition:transform .28s ease;overflow-y:auto}
.mobile-drawer.open{transform:translateY(0)}
.drawer-close{position:absolute;top:18px;right:20px}
.drawer-link{display:block;font-size:18px;font-weight:600;color:var(--ink);padding:16px 4px;border-bottom:1px solid var(--divider)}
.drawer-link.active{color:var(--brand)}
.drawer-cta{margin-top:auto}
body.no-scroll{overflow:hidden}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:all .2s ease;white-space:nowrap}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px -8px var(--accent-shadow)}
.btn-primary:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px -10px rgba(224,122,47,.34)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:#fff;border-color:var(--brand-line);color:var(--brand)}
.btn-outline:hover{background:var(--brand-light);color:var(--brand-deep)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn:disabled,.btn[disabled]{opacity:.5;pointer-events:none}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px}
.btn-text span.arrow{transition:transform .18s ease;display:inline-block}
.btn-text:hover span.arrow{transform:translateX(4px)}

/* ---------- hero ---------- */
.hero{position:relative;padding-top:96px;padding-bottom:56px;overflow:hidden;background:var(--bg-alt)}
@media(min-width:1024px){.hero{padding-top:120px;padding-bottom:96px}}
.hero::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-1.webp') center right/cover no-repeat}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(115deg,rgba(255,255,255,.92) 0%,rgba(255,255,255,.80) 46%,rgba(246,249,251,.72) 100%)}
.hero-inner{position:relative;z-index:2;max-width:720px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand-deep);
  background:rgba(230,240,245,.9);border:1px solid var(--brand-line);border-radius:var(--radius-badge);padding:5px 12px;margin-bottom:20px}
.hero h1{font-size:clamp(30px,4.2vw,52px);line-height:1.18;font-weight:700;letter-spacing:-.01em;margin-bottom:18px}
.hero-sub{font-size:clamp(16px,1.6vw,18px);line-height:1.85;color:var(--muted);max-width:620px;margin-bottom:28px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px}
.trust-bar{display:flex;flex-wrap:wrap;gap:12px 26px;font-size:14px;color:var(--weak)}
.trust-bar li{display:flex;align-items:center;gap:8px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--success);flex:0 0 auto;box-shadow:0 0 0 3px rgba(46,158,126,.16)}

/* ---------- compare table ---------- */
.compare-wrap{display:none}
@media(min-width:1024px){.compare-wrap{display:block;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:var(--shadow-card);overflow:auto}}
.compare-table{width:100%;font-size:15px;min-width:820px}
.compare-table th,.compare-table td{padding:18px 20px;text-align:center;border-bottom:1px solid var(--divider);vertical-align:middle}
.compare-table thead th{position:relative;padding-top:42px;padding-bottom:20px;font-size:16px;font-weight:600;color:var(--ink);background:#fff;position:sticky;top:0;z-index:3}
.compare-table thead th:first-child{padding-top:22px;z-index:5}
.compare-table td:first-child,.compare-table th:first-child{position:sticky;left:0;text-align:left;font-weight:600;color:var(--ink);background:#fff;box-shadow:1px 0 0 var(--divider);z-index:2}
.compare-table th.is-featured,.compare-table td.is-featured{background:var(--brand-light)}
.compare-table tbody tr:hover td{background:#FBFDFE}
.compare-table tbody tr:hover td.is-featured{background:#DEEBF2}
.compare-table tbody tr:hover td:first-child{background:#FBFDFE}
.recommend-badge{position:absolute;top:10px;left:50%;transform:translateX(-50%);background:var(--accent);color:#fff;font-size:12px;font-weight:600;padding:2px 10px;border-radius:var(--radius-badge)}
.ct-name{display:block}
.ct-note{display:block;font-size:13px;font-weight:400;color:var(--weak);margin-top:2px}
.ct-actions td{border-bottom:none;padding-top:8px;padding-bottom:26px}
.tick{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;background:rgba(46,158,126,.14);color:var(--success)}
.dash{color:#B9CBD5;font-weight:700}
.compare-cards{display:grid;gap:20px}
@media(min-width:1024px){.compare-cards{display:none}}
.plan-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:24px}
.plan-card h3{font-size:19px;margin-bottom:4px}
.plan-card .plan-note{font-size:13px;color:var(--weak);margin-bottom:16px}
.plan-card ul{border-top:1px solid var(--divider);margin-bottom:18px}
.plan-card li{display:flex;justify-content:space-between;gap:16px;font-size:14px;padding:11px 0;border-bottom:1px solid var(--divider);color:var(--muted)}
.plan-card li em{font-style:normal;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums}
.plan-card.recommended{border-color:var(--brand-line);background:linear-gradient(180deg,var(--brand-light),#fff 40%)}
.plan-card .plan-flag{display:inline-block;font-size:12px;font-weight:600;color:#fff;background:var(--accent);border-radius:var(--radius-badge);padding:2px 8px;margin-bottom:12px}

/* ---------- highlights ---------- */
.hl-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media(min-width:1024px){.hl-grid{grid-template-columns:repeat(12,1fr);gap:24px}
  .hl-wide{grid-column:span 7;grid-row:span 2}
  .hl-narrow{grid-column:span 5}
  .hl-full{grid-column:span 12}}
.hl-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:20px;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
@media(min-width:1024px){.hl-card{padding:26px}}
.hl-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover);border-color:var(--brand-line)}
.hl-media{border-radius:var(--radius-img);overflow:hidden;background:var(--bg-alt);aspect-ratio:16/9;margin-bottom:18px}
.hl-media img{width:100%;height:100%;object-fit:cover}
.hl-icon{width:38px;height:38px;border-radius:10px;border:1.5px solid var(--brand-line);color:var(--brand);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.hl-card h3{font-size:19px;margin-bottom:10px}
.hl-card p{font-size:15px;color:var(--muted);line-height:1.8;margin-bottom:16px}
.hl-card .btn-text{margin-top:auto}
.hl-full .hl-full-inner{display:flex;flex-direction:column;gap:20px}
@media(min-width:1024px){.hl-full .hl-full-inner{flex-direction:row;align-items:center}
  .hl-full .hl-full-text{flex:1 1 58%}
  .hl-full .hl-full-media{flex:1 1 42%}}
.hl-full .hl-media{margin-bottom:0;aspect-ratio:16/10}
.hl-points{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.hl-points li{font-size:13px;color:var(--brand-deep);background:var(--brand-light);border-radius:var(--radius-badge);padding:4px 10px}

/* ---------- stats ---------- */
.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media(min-width:1024px){.stats-grid{grid-template-columns:repeat(4,1fr);gap:24px}}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:22px;box-shadow:var(--shadow-card)}
.stat strong{display:block;font-size:clamp(24px,3vw,32px);font-weight:700;color:var(--brand-deep);font-variant-numeric:tabular-nums;letter-spacing:-.02em;line-height:1.2}
.stat span{display:block;font-size:14px;color:var(--muted);margin-top:6px}

/* ---------- preview track ---------- */
.preview-track{display:flex;gap:20px;overflow-x:auto;padding:4px 4px 18px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
.preview-track::-webkit-scrollbar{height:6px}
.preview-track::-webkit-scrollbar-track{background:var(--divider);border-radius:6px}
.preview-track::-webkit-scrollbar-thumb{background:var(--brand-line);border-radius:6px}
.preview-track::-webkit-scrollbar-thumb:hover{background:var(--brand)}
.preview-card{flex:0 0 86%;scroll-snap-align:start;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:16px;transition:transform .22s ease,box-shadow .22s ease;display:block}
@media(min-width:640px){.preview-card{flex:0 0 46%}}
@media(min-width:1024px){.preview-card{flex:0 0 calc((100% - 40px)/3)}}
.preview-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover);color:inherit}
.preview-media{position:relative;aspect-ratio:16/10;border-radius:var(--radius-img);overflow:hidden;background:var(--bg-alt);margin-bottom:16px}
.preview-media img{width:100%;height:100%;object-fit:cover}
.preview-badge{position:absolute;top:10px;right:10px;font-size:12px;font-weight:600;color:#fff;background:var(--accent);border-radius:var(--radius-badge);padding:2px 8px}
.preview-lock{position:absolute;inset:0;background:rgba(255,255,255,.45);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  color:var(--brand-deep);font-size:13px;text-align:center;padding:14px;transition:background .2s ease}
.preview-card:hover .preview-lock{background:rgba(255,255,255,.3)}
.preview-card h3{font-size:17px;margin-bottom:8px}
.preview-card p{font-size:14px;color:var(--muted);line-height:1.75}

/* ---------- posts ---------- */
.post-feature{display:grid;gap:20px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);
  padding:18px;margin-bottom:24px;transition:transform .22s ease,box-shadow .22s ease}
@media(min-width:768px){.post-feature{grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:26px;padding:20px}}
.post-feature:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover)}
.post-feature-media{border-radius:var(--radius-img);overflow:hidden;background:var(--bg-alt);aspect-ratio:16/10}
.post-feature-media img{width:100%;height:100%;object-fit:cover}
.post-feature-body{display:flex;flex-direction:column;justify-content:center;padding:4px 4px 8px}
.post-feature-body h3{font-size:clamp(19px,2vw,23px);margin:12px 0 10px}
.post-feature-body h3 a:hover{color:var(--brand)}
.post-feature-body p{font-size:15px;color:var(--muted);line-height:1.8;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:14px}
.badge{display:inline-block;font-size:12.5px;font-weight:600;color:var(--brand);background:var(--brand-light);border-radius:10px;padding:3px 10px}
.post-meta{display:flex;flex-wrap:wrap;gap:14px;font-size:13px;color:var(--weak);font-variant-numeric:tabular-nums}
.post-grid{display:grid;gap:20px}
@media(min-width:640px){.post-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.post-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.post-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:16px;
  display:flex;flex-direction:column;transition:transform .22s ease,box-shadow .22s ease}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover)}
.post-card-media{border-radius:var(--radius-img);overflow:hidden;background:var(--bg-alt);aspect-ratio:16/10;margin-bottom:14px}
.post-card-media img{width:100%;height:100%;object-fit:cover}
.post-card h3{font-size:17px;margin:10px 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card h3 a:hover{color:var(--brand)}
.post-card p{font-size:14px;color:var(--muted);line-height:1.75;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:14px}
.post-card .post-meta{margin-top:auto}
.empty-state{min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:#fff;border:1px dashed var(--line);border-radius:var(--radius-card);color:var(--weak);font-size:14px;padding:32px;text-align:center}

/* ---------- faq ---------- */
.faq-columns{display:grid;gap:0 40px}
@media(min-width:1024px){.faq-columns{grid-template-columns:repeat(2,1fr)}}
.faq-item{border-bottom:1px solid var(--divider)}
.faq-item:first-child{border-top:1px solid var(--divider)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;background:none;border:0;padding:20px 2px;
  font-size:17px;font-weight:600;color:var(--ink);text-align:left;cursor:pointer;transition:color .18s ease}
.faq-q:hover{color:var(--brand)}
.faq-mark{flex:0 0 auto;width:26px;height:26px;border-radius:8px;border:1px solid var(--brand-line);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:16px;transition:transform .24s ease,background .18s ease}
.faq-q[aria-expanded="true"] .faq-mark{transform:rotate(45deg);background:var(--brand-light)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-a-inner{padding:0 2px 20px;font-size:15px;line-height:1.85;color:var(--note)}

/* ---------- cta form ---------- */
.cta-section{background:linear-gradient(150deg,#12303D 0%,#14536E 100%);padding:56px 0;color:#C7D6DE}
@media(min-width:1024px){.cta-section{padding:88px 0}}
.cta-inner{display:grid;gap:32px;align-items:start}
@media(min-width:1024px){.cta-inner{grid-template-columns:minmax(0,1fr) 460px;gap:56px}}
.cta-copy h2{color:#fff;font-size:clamp(22px,2.6vw,32px);margin-bottom:14px}
.cta-copy p{font-size:16px;color:#B6C9D3;line-height:1.85;max-width:520px;margin-bottom:22px}
.cta-points{display:flex;flex-wrap:wrap;gap:10px}
.cta-points li{font-size:13.5px;color:#D6E4EA;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius-badge);padding:5px 12px}
.cta-form{background:#fff;border-radius:var(--radius-card);padding:24px;box-shadow:0 24px 50px -30px rgba(0,0,0,.5)}
@media(min-width:640px){.cta-form{padding:28px}}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;min-height:46px;border:1px solid var(--line);border-radius:10px;padding:11px 14px;
  font-size:15px;font-family:inherit;color:var(--text);background:#fff;transition:border-color .18s ease,box-shadow .18s ease}
.field textarea{resize:vertical;min-height:96px;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--ring)}
.field .err{display:none;font-size:13px;color:#C0453B;margin-top:6px}
.field.has-error input,.field.has-error select{border-color:#C0453B}
.field.has-error .err{display:block}
.check-row{display:flex;align-items:flex-start;gap:10px;margin-bottom:18px;font-size:14px;color:var(--muted)}
.check-row input{width:18px;height:18px;margin-top:4px;accent-color:var(--brand);flex:0 0 auto}
.check-row.has-error{color:#C0453B}

/* ---------- footer ---------- */
.site-footer{background:#12303D;color:#C7D6DE;padding:56px 0 0}
@media(min-width:1024px){.site-footer{padding-top:72px}}
.footer-grid{display:grid;gap:32px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-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:14px}
.footer-brand .logo-mark{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.18);color:#9FD3E6}
.footer-about{font-size:14px;line-height:1.85;color:#9FB6C1;max-width:340px}
.footer-title{font-size:14px;font-weight:600;letter-spacing:.08em;color:#fff;margin-bottom:14px}
.footer-link{display:block;font-size:14px;color:#C7D6DE;padding:5px 0}
.footer-link:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(199,214,222,.16);margin-top:44px;padding:20px 0;font-size:13px;color:#8FA9B5;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between}

/* roulang page: category1 */
:root{
  --brand:#1E6E8F; --brand-deep:#14536E; --brand-soft:#E6F0F5; --brand-line:#CFE1EA;
  --accent:#E07A2F; --accent-hover:#C9681F; --accent-soft:#FDF1E7;
  --success:#2E9E7E;
  --text:#16303C; --text-body:#2B3F4A; --text-sub:#4A6472; --text-mute:#7C93A1;
  --bg:#F6F9FB; --bg-alt:#EDF3F7; --card:#FFFFFF;
  --border:#DCE7EE; --divider:#E8EFF4;
  --focus:rgba(30,110,143,.28);
  --r-card:16px; --r-img:12px; --r-btn:10px; --r-badge:6px;
  --sh-card:0 1px 2px rgba(18,48,61,.06), 0 8px 24px -12px rgba(18,48,61,.12);
  --sh-card-hover:0 2px 4px rgba(18,48,61,.07), 0 18px 36px -16px rgba(18,48,61,.18);
  --sh-nav:0 1px 0 rgba(18,48,61,.06), 0 10px 30px -18px rgba(18,48,61,.24);
  --space-section:112px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;background:var(--bg);color:var(--text-body);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s ease}
a:hover{color:var(--accent)}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding-left:1.15em}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.nums{font-variant-numeric:tabular-nums}
.sr-only{position:absolute;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:absolute;top:0;left:0;right:0;z-index:60;
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(18,48,61,.08);
  box-shadow:var(--sh-nav);
  transition:background .22s ease,box-shadow .22s ease,height .22s ease;
}
.header-inner{display:flex;align-items:center;gap:20px;height:72px;transition:height .22s ease}
.site-header.is-scrolled{position:fixed;background:#FFFFFF;box-shadow:0 1px 0 rgba(18,48,61,.07),0 12px 30px -20px rgba(18,48,61,.34)}
.site-header.is-scrolled .header-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:9px;font-size:18px;font-weight:700;letter-spacing:-.01em;color:var(--text);white-space:nowrap}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:9px;background:var(--brand-soft);border:1px solid var(--brand-line)}
.logo:hover{color:var(--brand-deep)}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{position:relative;padding:8px 13px;border-radius:8px;font-size:15px;color:var(--text-sub);transition:color .18s ease,background .18s ease}
.nav-link:hover{color:var(--brand);background:rgba(230,240,245,.75)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:13px;right:13px;bottom:1px;height:2px;border-radius:2px;background:var(--accent)}
.header-actions{display:flex;align-items:center;gap:10px}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;border:1px solid transparent;color:var(--text-sub);transition:.18s ease}
.icon-btn:hover{color:var(--brand);background:var(--brand-soft);border-color:var(--brand-line)}
.icon-btn:active{transform:translateY(1px)}
.menu-btn{display:none}
.header-search{display:none;border-top:1px solid var(--divider);background:rgba(255,255,255,.96)}
.header-search.open{display:block}
.header-search form{padding:12px 0}
.header-search input{width:100%;height:44px;padding:0 16px;border-radius:var(--r-btn);border:1px solid var(--border);background:#fff;color:var(--text)}
.header-search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--focus)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease}
.btn:active{transform:translateY(0)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px -8px rgba(224,122,47,.28)}
.btn-primary:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px -10px rgba(224,122,47,.34)}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--brand-line)}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-deep);border-color:var(--brand-line)}
.btn-ghost{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px}
.btn-ghost .arrow{transition:transform .18s ease}
.btn-ghost:hover{color:var(--accent)}
.btn-ghost:hover .arrow{transform:translateX(4px)}
.btn[disabled]{opacity:.5;pointer-events:none}

/* ---------- mobile drawer ---------- */
.mobile-drawer{position:fixed;inset:0;z-index:80;background:#fff;padding:24px;display:none;flex-direction:column}
.mobile-drawer.open{display:flex}
.mobile-drawer .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.mobile-drawer a.drawer-link{display:block;padding:14px 4px;font-size:18px;color:var(--text);border-bottom:1px solid var(--divider)}
.mobile-drawer a.drawer-link.active{color:var(--brand);font-weight:700}
.mobile-drawer .drawer-foot{margin-top:auto;padding-top:20px}

/* ---------- hero ---------- */
.page-hero{position:relative;padding:132px 0 76px;background:#fff;overflow:hidden}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(115deg,rgba(255,255,255,.94) 0%,rgba(255,255,255,.82) 46%,rgba(246,249,251,.72) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
}
.page-hero > .container{position:relative}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-mute);margin-bottom:22px}
.breadcrumb a{color:var(--text-sub)}
.breadcrumb .sep{color:var(--brand-line)}
.breadcrumb .current{color:var(--text-mute)}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:var(--r-badge);background:var(--brand-soft);border:1px solid var(--brand-line);color:var(--brand-deep);font-size:13px;font-weight:600;margin-bottom:20px}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--success)}
h1.hero-title{font-size:clamp(30px,4.2vw,52px);font-weight:700;line-height:1.18;letter-spacing:-.01em;color:var(--text);max-width:900px}
.hero-sub{margin-top:20px;max-width:760px;font-size:17px;line-height:1.85;color:var(--text-sub)}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.trust-bar{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:38px;padding-top:22px;border-top:1px solid var(--divider)}
.trust-item{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-mute)}
.trust-item .dot{width:7px;height:7px;border-radius:50%;background:var(--success);flex:none}

/* ---------- sections ---------- */
.section{padding:var(--space-section) 0}
.section-alt{background:var(--bg-alt)}
.section-white{background:#fff}
.section-head{max-width:760px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
h2.section-title{position:relative;font-size:clamp(22px,2.6vw,34px);font-weight:700;line-height:1.3;color:var(--text);padding-left:16px}
h2.section-title::before{content:"";position:absolute;left:0;top:.3em;width:3px;height:.86em;border-radius:2px;background:var(--accent)}
h2.section-title.no-bar{padding-left:0}
h2.section-title.no-bar::before{display:none}
.section-desc{margin-top:14px;color:var(--text-sub);font-size:16px}
h3.card-title{font-size:19px;font-weight:600;line-height:1.4;color:var(--text)}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--brand);text-transform:uppercase;margin-bottom:12px}

/* ---------- layout: toc + content ---------- */
.detail-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:48px;align-items:start}
.toc{position:sticky;top:96px;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:22px 18px;box-shadow:var(--sh-card)}
.toc h4{font-size:13px;letter-spacing:.08em;color:var(--text-mute);font-weight:600;margin-bottom:14px}
.toc a{display:block;padding:9px 10px;border-radius:8px;font-size:14px;color:var(--text-sub);border-left:2px solid transparent;transition:.18s ease}
.toc a:hover{background:var(--brand-soft);color:var(--brand-deep)}
.toc a.active{color:var(--brand);background:var(--brand-soft);border-left-color:var(--accent);font-weight:600}
.toc .toc-cta{margin-top:18px;padding-top:16px;border-top:1px solid var(--divider)}
.toc .toc-cta p{font-size:13px;color:var(--text-mute);margin-bottom:12px}
.toc .toc-cta .btn{width:100%}

.longform{max-width:780px}
.longform > section + section{margin-top:64px}
.longform h2{font-size:clamp(21px,2.3vw,28px);font-weight:700;color:var(--text);line-height:1.35;padding-left:16px;position:relative;margin-bottom:20px}
.longform h2::before{content:"";position:absolute;left:0;top:.28em;width:3px;height:.86em;border-radius:2px;background:var(--accent)}
.longform h3{font-size:17px;font-weight:600;color:var(--text);margin:30px 0 10px}
.longform p{color:var(--text-body);margin-bottom:16px}
.longform p:last-child{margin-bottom:0}
.longform ul,.longform ol{margin:14px 0 18px;color:var(--text-body)}
.longform li{margin-bottom:9px;line-height:1.8}
.longform li::marker{color:var(--brand)}
.note{margin-top:22px;padding:18px 20px;border-radius:var(--r-card);background:var(--brand-soft);border:1px solid var(--brand-line);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}
.note p{font-size:14px;color:var(--brand-deep);margin:0}
.note a{font-size:14px;font-weight:600;color:var(--brand)}
.note a:hover{color:var(--accent)}
.keyfacts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:24px 0 8px}
.keyfact{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh-card)}
.keyfact .num{font-size:26px;font-weight:700;color:var(--brand);line-height:1.2;font-variant-numeric:tabular-nums}
.keyfact .label{margin-top:6px;font-size:13px;color:var(--text-mute)}

/* asymmetric cards */
.asym{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px;margin-top:8px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-card);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-card-hover);border-color:var(--brand-line)}
.card-wide{grid-column:span 7}
.card-narrow{grid-column:span 5}
.card-stack{grid-column:span 5;display:grid;gap:24px}
.card .icon{width:34px;height:34px;color:var(--brand);margin-bottom:16px}
.card .icon.accent{color:var(--accent)}
.card p{font-size:15px;color:var(--text-sub);margin-top:10px}
.card .entry{margin-top:16px}
.card-media{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--border);margin-bottom:18px;aspect-ratio:16/10;background:var(--brand-soft)}
.card-media img{width:100%;height:100%;object-fit:cover}

/* figure wide */
.figure-wide{margin:40px 0 0;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--border);background:#fff;box-shadow:var(--sh-card)}
.figure-wide .media{aspect-ratio:21/9;background:var(--brand-soft)}
.figure-wide .media img{width:100%;height:100%;object-fit:cover}
.figure-wide figcaption{padding:16px 22px;font-size:13px;color:var(--text-mute);border-top:1px solid var(--divider)}

/* ---------- plan cards ---------- */
.plans{display:grid;gap:20px}
.plan{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-card);display:grid;grid-template-columns:230px minmax(0,1fr);gap:28px;align-items:start;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.plan:hover{transform:translateY(-3px);box-shadow:var(--sh-card-hover)}
.plan.recommended{border-color:var(--brand-line);background:#fff;box-shadow:0 1px 2px rgba(18,48,61,.06),0 16px 34px -18px rgba(30,110,143,.28)}
.plan-name{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--text)}
.tag{display:inline-flex;align-items:center;padding:3px 9px;border-radius:var(--r-badge);font-size:12px;font-weight:600;background:var(--accent);color:#fff}
.tag-soft{background:var(--brand-soft);color:var(--brand-deep);border:1px solid var(--brand-line)}
.plan-price{margin-top:12px;font-size:14px;color:var(--text-mute)}
.plan-price b{font-size:26px;color:var(--brand);font-weight:700;font-variant-numeric:tabular-nums}
.plan-desc{margin-top:12px;font-size:14px;color:var(--text-sub)}
.plan-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 24px;list-style:none;padding:0;margin:0}
.plan-list li{display:flex;gap:9px;align-items:flex-start;font-size:14.5px;color:var(--text-body);line-height:1.7}
.plan-list li svg{flex:none;margin-top:5px}
.plan-list li.off{color:var(--text-mute)}
.plan-foot{grid-column:1 / -1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;border-top:1px solid var(--divider);padding-top:18px}
.plan-foot span{font-size:13px;color:var(--text-mute)}

/* ---------- steps timeline ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:12px;position:relative}
.step{position:relative;padding-top:34px}
.step::before{content:"";position:absolute;top:9px;left:0;right:0;height:1px;background:var(--brand-line)}
.step:first-child::before{left:9px}
.step:last-child::before{right:calc(100% - 9px)}
.step .dot{position:absolute;top:0;left:0;width:19px;height:19px;border-radius:50%;background:#fff;border:2px solid var(--accent);display:flex;align-items:center;justify-content:center}
.step .dot i{width:7px;height:7px;border-radius:50%;background:var(--accent);display:block}
.step .idx{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.06em}
.step h3{font-size:17px;font-weight:600;color:var(--text);margin:8px 0 8px}
.step p{font-size:14.5px;color:var(--text-sub)}

/* ---------- env list ---------- */
.env-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.env-item{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-card)}
.env-item h3{font-size:16px;font-weight:600;color:var(--text);margin-bottom:8px}
.env-item p{font-size:14.5px;color:var(--text-sub)}
.env-item .chip{display:inline-block;margin:2px 6px 2px 0;padding:4px 10px;border-radius:var(--r-badge);background:var(--brand-soft);color:var(--brand-deep);font-size:12.5px;border:1px solid var(--brand-line)}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--divider)}
.faq-item{border-bottom:1px solid var(--divider)}
.faq-q{width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding:22px 4px;text-align:left;font-size:17px;font-weight:600;color:var(--text);transition:color .18s ease}
.faq-q:hover{color:var(--brand)}
.faq-q .plus{flex:none;width:22px;height:22px;position:relative;margin-top:4px;transition:transform .24s ease}
.faq-q .plus::before,.faq-q .plus::after{content:"";position:absolute;background:var(--brand);border-radius:2px}
.faq-q .plus::before{left:50%;top:0;width:2px;height:22px;transform:translateX(-50%)}
.faq-q .plus::after{top:50%;left:0;height:2px;width:22px;transform:translateY(-50%)}
.faq-q[aria-expanded="true"]{color:var(--brand)}
.faq-q[aria-expanded="true"] .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-a p{padding:0 4px 22px;font-size:15px;line-height:1.8;color:var(--text-sub);max-width:760px}

/* ---------- cta ---------- */
.cta-band{background:#12303D;color:#EAF2F6;padding:88px 0}
.cta-grid{display:grid;grid-template-columns:minmax(0,1fr) 460px;gap:48px;align-items:start}
.cta-band h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.3;color:#fff}
.cta-band .lead{margin-top:16px;font-size:16px;line-height:1.85;color:#B9CDD8;max-width:520px}
.cta-list{margin-top:26px;padding:0;list-style:none;display:grid;gap:10px}
.cta-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:#C7D6DE}
.cta-list svg{flex:none;margin-top:5px;color:#2E9E7E}
.form-card{background:#fff;border-radius:var(--r-card);padding:28px;box-shadow:0 24px 60px -30px rgba(0,0,0,.5)}
.form-card h3{font-size:19px;font-weight:700;color:var(--text)}
.form-card .hint{margin-top:8px;font-size:13.5px;color:var(--text-mute)}
.field{margin-top:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--text-sub);margin-bottom:7px}
.field input,.field select,.field textarea{width:100%;height:46px;padding:0 14px;border-radius:var(--r-btn);border:1px solid var(--border);background:#fff;color:var(--text);transition:border-color .18s ease,box-shadow .18s ease}
.field textarea{height:auto;min-height:88px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--focus)}
.field.has-error input,.field.has-error select{border-color:#C0453B}
.err{display:none;margin-top:7px;font-size:13px;color:#C0453B}
.field.has-error .err{display:block}
.check{display:flex;gap:10px;align-items:flex-start;margin-top:18px;font-size:13.5px;color:var(--text-sub);line-height:1.7}
.check input{width:17px;height:17px;margin-top:4px;flex:none;accent-color:#1E6E8F}
.form-card .btn{width:100%;margin-top:20px}
.form-note{margin-top:14px;font-size:12.5px;color:var(--text-mute);text-align:center}
.form-success{display:none;margin-top:16px;padding:14px 16px;border-radius:var(--r-btn);background:var(--brand-soft);border:1px solid var(--brand-line);color:var(--brand-deep);font-size:14px}
.form-success.show{display:block}

/* ---------- footer ---------- */
.site-footer{background:#12303D;color:#C7D6DE;padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff}
.footer-brand .logo-mark{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.14);color:#8FC3D8}
.footer-about{margin-top:16px;font-size:14px;line-height:1.8;color:#9FB7C4;max-width:340px}
.footer-title{font-size:14px;font-weight:600;letter-spacing:.08em;color:#fff;margin-bottom:16px}
.footer-link{display:block;font-size:14px;color:#C7D6DE;padding:5px 0;margin:0}
.footer-link:hover{color:var(--accent)}
.footer-bottom{margin-top:56px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:13px;color:#8AA3B0}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  :root{--space-section:88px}
  .main-nav{display:none}
  .menu-btn{display:inline-flex}
  .header-actions .btn-primary{display:none}
  .detail-layout{grid-template-columns:1fr;gap:32px}
  .toc{position:static}
  .toc a{display:inline-block;margin:0 6px 8px 0}
  .toc a{border-left:0;border-bottom:2px solid transparent;padding:7px 10px}
  .toc a.active{border-left:0;border-bottom-color:var(--accent)}
  .longform{max-width:none}
  .asym{grid-template-columns:repeat(6,minmax(0,1fr))}
  .card-wide{grid-column:span 6}
  .card-narrow,.card-stack{grid-column:span 6}
  .card-stack{grid-template-columns:repeat(2,minmax(0,1fr))}
  .plan{grid-template-columns:1fr;gap:20px}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}
  .step:nth-child(3)::before{left:9px}
  .step:nth-child(2)::before{right:calc(100% - 9px)}
}
@media (max-width:768px){
  .container{padding:0 20px}
  :root{--space-section:64px}
  .page-hero{padding:104px 0 56px}
  h1.hero-title{font-size:clamp(26px,7.4vw,36px)}
  .hero-sub{font-size:15.5px}
  .hero-cta .btn{width:100%}
  .trust-bar{gap:10px 18px}
  .section{padding:var(--space-section) 0}
  .keyfacts{grid-template-columns:1fr}
  .card-stack{grid-template-columns:1fr}
  .asym > *{grid-column:span 6}
  .env-grid{grid-template-columns:1fr}
  .plan-list{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .step::before{display:none}
  .step{padding-top:0;padding-left:32px}
  .step .dot{top:4px;left:0}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:64px 0}
  .form-card{padding:22px}
  .faq-q{font-size:16px;padding:18px 2px}
}
@media (max-width:520px){
  .hero-cta{flex-direction:column}
  .trust-item{font-size:13px}
  .card{padding:20px}
  .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --brand:#1E6E8F;
  --brand-dark:#14536E;
  --brand-light:#E6F0F5;
  --brand-line:#CFE1EA;
  --accent:#E07A2F;
  --accent-hover:#C9681F;
  --accent-light:#FDF1E7;
  --accent-shadow:rgba(224,122,47,.28);
  --success:#2E9E7E;
  --text:#16303C;
  --text-body:#2B3F4A;
  --text-sub:#4A6472;
  --text-mute:#7C93A1;
  --bg:#F6F9FB;
  --bg-alt:#EDF3F7;
  --card:#FFFFFF;
  --border:#DCE7EE;
  --divider:#E8EFF4;
  --focus:rgba(30,110,143,.28);
  --radius-card:16px;
  --radius-img:12px;
  --radius-btn:10px;
  --radius-badge:6px;
  --shadow-card:0 1px 2px rgba(18,48,61,.06), 0 8px 24px -12px rgba(18,48,61,.12);
  --shadow-card-hover:0 2px 4px rgba(18,48,61,.07), 0 18px 36px -16px rgba(18,48,61,.18);
  --shadow-nav:0 1px 0 rgba(18,48,61,.06), 0 10px 30px -18px rgba(18,48,61,.24);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text-body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{color:var(--text);margin:0;font-weight:700}
p{margin:0}
img{max-width:100%;display:block;border-radius:var(--radius-img)}
a{color:inherit;text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
ul,ol{margin:0;padding:0}
:focus-visible{outline:2px solid var(--brand-dark);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 阅读进度条 ---------- */
.read-progress{position:fixed;top:0;left:0;right:0;height:2px;background:transparent;z-index:120}
.read-progress span{display:block;height:100%;width:0;background:var(--accent);transition:width .1s linear}

/* ---------- 导航 ---------- */
.site-header{
  position:absolute;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(18,48,61,.08);
  transition:background .22s ease, box-shadow .22s ease, height .22s ease;
}
.site-header.is-stuck{
  position:fixed;
  background:#FFFFFF;
  box-shadow:var(--shadow-nav);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px;transition:height .22s ease}
.site-header.is-stuck .header-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--text);letter-spacing:-.01em}
.logo:hover{color:var(--brand)}
.logo-mark{width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;background:var(--brand-light);border:1px solid var(--brand-line);flex:0 0 auto}
.main-nav{display:flex;align-items:center;gap:28px}
.site-header.is-stuck .main-nav{gap:22px}
.nav-link{position:relative;font-size:15px;color:var(--text-sub);padding:6px 0;font-weight:500}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .22s ease}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:var(--brand)}
.header-actions{display:flex;align-items:center;gap:10px}
.icon-btn{width:40px;height:40px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;color:var(--text-sub);border:1px solid transparent;transition:background .2s ease,color .2s ease,border-color .2s ease}
.icon-btn:hover{background:var(--brand-light);color:var(--brand);border-color:var(--brand-line)}
.icon-btn:active{transform:translateY(1px)}
.menu-btn{display:none}
.header-search{max-height:0;overflow:hidden;transition:max-height .25s ease;border-top:1px solid transparent}
.header-search.open{max-height:90px;border-top-color:var(--divider)}
.header-search .container{padding-top:12px;padding-bottom:14px}
.header-search input{width:100%;height:44px;border-radius:var(--radius-btn);border:1px solid var(--border);padding:0 16px;background:#fff;transition:border-color .2s ease, box-shadow .2s ease}
.header-search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--focus)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1px solid transparent;transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .16s ease}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 18px -10px var(--accent-shadow)}
.btn-primary:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px -10px rgba(224,122,47,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 10px -6px var(--accent-shadow)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand);}
.btn-ghost:hover{background:var(--brand-light);color:var(--brand-dark)}
.btn-text{color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:6px;height:auto;padding:0}
.btn-text svg{transition:transform .2s ease}
.btn-text:hover{color:var(--accent)}
.btn-text:hover svg{transform:translateX(4px)}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;pointer-events:none}

/* ---------- 面包屑 ---------- */
.crumb{padding:96px 0 0}
.crumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-mute)}
.crumb-list a{color:var(--text-mute)}
.crumb-list a:hover{color:var(--brand)}
.crumb-sep{color:var(--brand-line)}
.crumb-current{color:var(--text-mute);max-width:44vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头部 ---------- */
.article-hero{position:relative;margin-top:20px;border-radius:20px;overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow-card)}
.article-hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center}
.article-hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(255,255,255,.92) 0%,rgba(255,255,255,.78) 55%,rgba(230,240,245,.72) 100%)}
.article-hero-inner{position:relative;padding:44px 40px 40px;max-width:860px}
.badge{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--radius-badge);background:var(--brand-light);color:var(--brand-dark);font-size:13px;font-weight:600;border:1px solid var(--brand-line)}
.article-hero h1{font-size:clamp(28px,3.8vw,44px);line-height:1.22;letter-spacing:-.01em;margin:16px 0 14px;font-weight:700}
.article-lead{font-size:16px;color:var(--text-sub);max-width:720px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-top:22px;font-size:13px;color:var(--text-mute);font-variant-numeric:tabular-nums}
.article-meta .dot{width:6px;height:6px;border-radius:50%;background:var(--success);display:inline-block;margin-right:6px}
.article-meta-item{display:inline-flex;align-items:center}

/* ---------- 布局 ---------- */
.article-main{padding:56px 0 88px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:56px;align-items:start}
.article-wrap{max-width:780px}

/* ---------- 正文排版 ---------- */
.article-body{font-size:16px;line-height:1.85;color:var(--text-body)}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1.1em}
.article-body h2{font-size:clamp(20px,2.2vw,26px);line-height:1.35;margin:40px 0 16px;padding-left:14px;border-left:3px solid var(--accent);font-weight:700}
.article-body h3{font-size:18px;font-weight:600;line-height:1.45;margin:28px 0 12px;color:var(--text)}
.article-body h4{font-size:16px;font-weight:600;margin:22px 0 10px}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:22px}
.article-body li{margin-bottom:8px;line-height:1.8}
.article-body ul li{list-style:disc}
.article-body ol li{list-style:decimal}
.article-body img{border-radius:var(--radius-img);margin:20px 0 10px;width:100%;height:auto}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--text-mute);text-align:center;margin-top:8px}
.article-body blockquote{margin:24px 0;padding:16px 20px;background:var(--brand-light);border-left:3px solid var(--brand);border-radius:0 var(--radius-img) var(--radius-img) 0;color:var(--text-sub)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{width:100%;border-collapse:collapse;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--divider);padding:12px 16px;text-align:left}
.article-body th{background:var(--bg-alt);font-weight:600;color:var(--text)}
.article-body .table-scroll,.article-body table{overflow-x:auto;display:block}
.article-body code{background:var(--bg-alt);border:1px solid var(--border);border-radius:6px;padding:2px 6px;font-size:14px}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}

/* ---------- 会员引导卡 ---------- */
.member-inline{margin:40px 0;padding:28px;background:var(--brand-light);border:1px solid var(--brand-line);border-radius:var(--radius-card);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px}
.member-inline h3{font-size:19px;margin-bottom:8px}
.member-inline p{font-size:15px;color:var(--text-sub);max-width:520px}
.member-inline-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--radius-badge);background:#fff;border:1px solid var(--brand-line);color:var(--brand-dark);font-size:13px}

/* ---------- 空态 ---------- */
.empty-state{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);padding:48px 32px;text-align:center;box-shadow:var(--shadow-card);min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px}
.empty-state svg{color:var(--brand)}
.empty-state h2{font-size:20px}
.empty-state p{color:var(--text-mute);font-size:15px;max-width:420px}

/* ---------- 侧栏 ---------- */
.article-aside{position:sticky;top:92px;display:flex;flex-direction:column;gap:20px}
.aside-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);padding:20px;box-shadow:var(--shadow-card)}
.aside-title{font-size:14px;letter-spacing:.04em;color:var(--text-sub);font-weight:700;margin-bottom:12px}
.aside-list{display:flex;flex-direction:column;gap:10px}
.aside-list a{font-size:14px;color:var(--text-sub);display:flex;gap:8px;align-items:flex-start;line-height:1.6}
.aside-list a:hover{color:var(--brand)}
.aside-list a::before{content:"";flex:0 0 auto;width:5px;height:5px;border-radius:50%;background:var(--brand-line);margin-top:9px}
.aside-cta{background:var(--brand-dark);border-radius:var(--radius-card);padding:22px;color:#fff}
.aside-cta h3{color:#fff;font-size:17px;margin-bottom:8px}
.aside-cta p{font-size:14px;color:#C7D6DE;margin-bottom:16px}

/* ---------- 相关推荐 ---------- */
.related{padding:64px 0 80px;background:var(--bg-alt)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px}
.section-head h2{font-size:clamp(22px,2.6vw,32px);line-height:1.3;margin-bottom:8px}
.section-head p{color:var(--text-sub);font-size:15px;max-width:640px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);transition:box-shadow .22s ease,transform .22s ease;display:flex;flex-direction:column}
.card:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-3px)}
.card:hover h3{color:var(--brand)}
.card-media{aspect-ratio:16/10;overflow:hidden;background:var(--brand-light);border-radius:0}
.card-media img{width:100%;height:100%;object-fit:cover;border-radius:0}
.card-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:18px;line-height:1.4;font-weight:600}
.card-body p{font-size:14px;color:var(--text-sub);line-height:1.75}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-mute);font-variant-numeric:tabular-nums}

/* ---------- CTA 表单 ---------- */
.join{background:var(--brand-dark);color:#fff;padding:72px 0}
.join-inner{display:grid;grid-template-columns:1fr 440px;gap:48px;align-items:center}
.join h2{color:#fff;font-size:clamp(22px,2.6vw,32px);line-height:1.3;margin-bottom:14px}
.join p{color:#C7D6DE;font-size:15px;max-width:520px}
.join-points{display:flex;flex-wrap:wrap;gap:14px;margin-top:24px;font-size:14px;color:#DCE7EE}
.join-points span{display:inline-flex;align-items:center;gap:8px}
.join-points i{width:8px;height:8px;border-radius:50%;background:var(--success);display:inline-block}
.form-card{background:#fff;border-radius:var(--radius-card);padding:28px;box-shadow:0 24px 48px -28px rgba(0,0,0,.5)}
.form-card h3{font-size:19px;margin-bottom:6px}
.form-card .form-hint{font-size:13px;color:var(--text-mute);margin-bottom:18px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--text-sub);margin-bottom:6px;font-weight:600}
.field input,.field select,.field textarea{width:100%;height:46px;border-radius:var(--radius-btn);border:1px solid var(--border);padding:0 14px;background:#fff;color:var(--text);transition:border-color .2s ease,box-shadow .2s ease}
.field textarea{height:auto;padding:12px 14px;resize:vertical;min-height:88px;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--focus)}
.check{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--text-sub);margin:6px 0 18px}
.check input{width:16px;height:16px;margin-top:5px;flex:0 0 auto;accent-color:var(--brand)}

/* ---------- 页脚 ---------- */
.site-footer{background:#12303D;color:#C7D6DE;padding:64px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:14px}
.footer-brand .logo-mark{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.16)}
.footer-about{font-size:14px;line-height:1.8;color:#9FB6C2;max-width:340px}
.footer-title{font-size:14px;letter-spacing:.06em;color:#fff;margin-bottom:16px;font-weight:700}
.footer-link{display:block;font-size:14px;color:#C7D6DE;margin-bottom:10px;line-height:1.7}
.footer-link:hover{color:var(--accent)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:22px;font-size:13px;color:#8FA7B4}

/* ---------- 移动端抽屉 ---------- */
.mobile-drawer{position:fixed;inset:0;z-index:200;background:#fff;transform:translateX(100%);transition:transform .28s ease;display:flex;flex-direction:column;padding:20px 20px 28px}
.mobile-drawer.open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.drawer-nav{display:flex;flex-direction:column;gap:4px;flex:1}
.drawer-nav a{font-size:18px;color:var(--text);padding:14px 4px;border-bottom:1px solid var(--divider)}
.drawer-nav a:hover{color:var(--brand)}
.drawer-foot{padding-top:18px}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:40px}
  .article-aside{position:static;order:2}
  .article-wrap{max-width:100%}
  .join-inner{grid-template-columns:1fr;gap:32px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:768px){
  .main-nav{display:none}
  .menu-btn{display:inline-flex}
  .header-actions .btn-primary{display:none}
  .crumb{padding-top:88px}
  .article-hero-inner{padding:30px 22px 28px}
  .article-main{padding:40px 0 64px}
  .container{padding:0 20px}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .related,.join{padding-top:56px;padding-bottom:56px}
}
@media (max-width:520px){
  .header-inner{height:64px}
  .site-header.is-stuck .header-inner{height:56px}
  .logo span:last-child{font-size:16px}
  .article-meta{gap:12px}
  .crumb-current{max-width:60vw}
  .footer-grid{grid-template-columns:1fr}
  .btn{width:100%}
  .header-actions .icon-btn,.header-actions .btn{width:auto}
  .member-inline{padding:22px}
}

/* roulang page: category2 */
:root{
  --brand:#1E6E8F; --brand-deep:#14536E; --brand-soft:#E6F0F5; --brand-line:#CFE1EA;
  --accent:#E07A2F; --accent-hover:#C9681F; --accent-soft:#FDF1E7; --accent-shadow:rgba(224,122,47,.28);
  --success:#2E9E7E;
  --ink:#16303C; --ink-body:#2B3F4A; --muted:#4A6472; --weak:#7C93A1;
  --bg:#F6F9FB; --bg-alt:#EDF3F7; --card:#FFFFFF;
  --line:#DCE7EE; --line-soft:#E8EFF4; --focus:rgba(30,110,143,.28);
  --r-card:16px; --r-img:12px; --r-btn:10px; --r-badge:6px;
  --shadow-card:0 1px 2px rgba(18,48,61,.06), 0 8px 24px -12px rgba(18,48,61,.12);
  --shadow-card-hover:0 2px 4px rgba(18,48,61,.07), 0 18px 36px -16px rgba(18,48,61,.18);
  --shadow-nav:0 1px 0 rgba(18,48,61,.06), 0 10px 30px -18px rgba(18,48,61,.24);
  --font:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html body{
  margin:0;font-family:var(--font);font-size:16px;line-height:1.85;
  color:var(--ink-body);background:var(--bg);-webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em}
p{margin:0}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease}
a:hover{color:var(--brand)}
img{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-deep);outline-offset:2px}
::selection{background:var(--brand-soft);color:var(--brand-deep)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:760px;margin-bottom:42px}
.section-head h2{font-size:clamp(22px,2.6vw,34px);line-height:1.3;margin-bottom:12px}
.section-head p{font-size:16px;color:var(--muted);line-height:1.85}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .18s ease,box-shadow .2s ease;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 20px -10px var(--accent-shadow)}
.btn-primary:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px -10px rgba(224,122,47,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 16px -10px var(--accent-shadow)}
.btn-primary:focus-visible{outline:2px solid var(--brand-deep);outline-offset:2px}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand-line)}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep);border-color:var(--brand-line)}
.btn-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px}
.btn-link:hover{color:var(--accent)}
.btn-link svg{transition:transform .2s ease}
.btn-link:hover svg{transform:translateX(4px)}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(18,48,61,.08);
  box-shadow:var(--shadow-nav);
  transition:background-color .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.site-header.is-scrolled{background:#fff;border-bottom-color:var(--line-soft);box-shadow:0 8px 28px -18px rgba(18,48,61,.34)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px;transition:height .22s ease}
.site-header.is-scrolled .header-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--ink);white-space:nowrap}
.logo:hover{color:var(--brand-deep)}
.logo-mark{
  display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;
  border-radius:10px;background:#fff;border:1px solid var(--brand-line);
  box-shadow:0 6px 14px -10px rgba(18,48,61,.5);flex:none;
}
.main-nav{display:flex;align-items:center;gap:4px}
.nav-link{position:relative;padding:8px 14px;border-radius:8px;font-size:15px;color:var(--muted);transition:color .2s ease,background-color .2s ease}
.nav-link:hover{color:var(--brand-deep);background:var(--brand-soft)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;background:var(--accent);border-radius:2px}
.header-actions{display:flex;align-items:center;gap:10px}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
  border-radius:10px;color:var(--brand-deep);border:1px solid transparent;
  transition:background-color .2s ease,border-color .2s ease,color .2s ease;
}
.icon-btn:hover{background:var(--brand-soft);border-color:var(--brand-line);color:var(--brand-deep)}
.icon-btn:active{background:#d9e9f1}
.menu-btn{display:none}
.header-search{max-height:0;overflow:hidden;border-top:1px solid transparent;transition:max-height .25s ease,border-color .25s ease}
.site-header.search-open .header-search{max-height:90px;border-top-color:var(--line-soft)}
.header-search form{display:flex;align-items:center;padding:14px 0}
.header-search input{
  width:100%;height:46px;padding:0 16px;border-radius:10px;background:#fff;
  border:1px solid var(--line);color:var(--ink);outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.header-search input::placeholder{color:var(--weak)}
.header-search input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--focus)}

/* ---------- Page hero ---------- */
.page-hero{
  position:relative;padding:152px 0 84px;border-bottom:1px solid var(--line-soft);
  background-image:
    linear-gradient(112deg, rgba(255,255,255,.94) 0%, rgba(255,255,255,.87) 38%, rgba(237,243,247,.78) 100%),
    url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--weak);margin-bottom:20px}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--weak)}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:20px;padding:6px 14px;
  border-radius:8px;background:rgba(255,255,255,.88);border:1px solid var(--brand-line);
  font-size:13px;font-weight:600;color:var(--brand-deep);
}
.hero-title{font-size:clamp(30px,4.2vw,52px);line-height:1.18;font-weight:700;letter-spacing:-.01em;max-width:860px}
.hero-sub{margin-top:20px;max-width:680px;font-size:17px;line-height:1.9;color:var(--muted)}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.trust-bar{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:34px;font-size:14px;color:var(--weak)}
.trust-item{display:inline-flex;align-items:center;gap:8px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 0 4px rgba(46,158,126,.14);flex:none}

/* ---------- Stat grid ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.stat-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--shadow-card);
  transition:transform .22s ease,box-shadow .22s ease;
}
.stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover)}
.stat-num{font-size:30px;font-weight:700;color:var(--brand);line-height:1.2;font-variant-numeric:tabular-nums}
.stat-label{margin-top:8px;font-size:15px;font-weight:600;color:var(--ink)}
.stat-desc{margin-top:6px;font-size:14px;color:var(--weak);line-height:1.75}

/* ---------- Scene grid ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.scene-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover);border-color:var(--brand-line)}
.scene-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-alt)}
.scene-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.scene-card:hover .scene-media img{transform:scale(1.03)}
.scene-tag{
  position:absolute;top:12px;left:12px;padding:4px 10px;border-radius:var(--r-badge);
  background:rgba(255,255,255,.94);color:var(--brand);font-size:12.5px;font-weight:600;
  border:1px solid var(--brand-line);
}
.scene-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:10px}
.scene-body h3{font-size:19px;line-height:1.4}
.scene-body p{font-size:15px;color:var(--muted);line-height:1.85}
.scene-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.chip{
  display:inline-flex;align-items:center;padding:3px 10px;border-radius:var(--r-badge);
  background:var(--brand-soft);color:var(--brand);font-size:12.5px;font-weight:600;
}
.scene-wide{grid-column:span 2;flex-direction:row}
.scene-wide .scene-media{width:46%;aspect-ratio:auto;min-height:300px}
.scene-wide .scene-body{flex:1;justify-content:center;padding:36px 40px}

/* ---------- Timeline ---------- */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;position:relative;padding-top:44px}
.timeline::before{content:"";position:absolute;top:9px;left:2px;right:2px;height:2px;background:var(--brand-line);border-radius:2px}
.tl-item{position:relative}
.tl-item::before{
  content:"";position:absolute;top:-44px;left:0;width:18px;height:18px;border-radius:50%;
  background:#fff;border:3px solid var(--accent);box-shadow:0 0 0 5px rgba(224,122,47,.12);z-index:1;
}
.tl-num{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.08em;font-variant-numeric:tabular-nums}
.tl-item h3{font-size:18px;margin:8px 0 8px;line-height:1.45}
.tl-item p{font-size:15px;color:var(--muted);line-height:1.85}

/* ---------- Choice rows ---------- */
.choice-list{display:grid;gap:16px}
.choice-row{
  display:grid;grid-template-columns:210px 1fr auto;gap:24px;align-items:center;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px 28px;box-shadow:var(--shadow-card);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.choice-row:hover{transform:translateY(-2px);box-shadow:var(--shadow-card-hover);border-color:var(--brand-line)}
.choice-scale{font-size:16px;font-weight:700;color:var(--brand)}
.choice-row p{font-size:15px;color:var(--muted);line-height:1.8}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 44px}
.faq-item{border-bottom:1px solid var(--line-soft)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 2px;font-size:18px;font-weight:600;color:var(--ink);
  cursor:pointer;list-style:none;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q::after{
  content:"";width:14px;height:14px;flex:none;border-radius:2px;
  background-image:linear-gradient(var(--brand),var(--brand)),linear-gradient(var(--brand),var(--brand));
  background-size:100% 2px,2px 100%;
  background-position:center,center;
  background-repeat:no-repeat;
  transition:transform .24s ease;
}
.faq-item[open] .faq-q::after{transform:rotate(45deg)}
.faq-item[open] .faq-q{color:var(--brand-deep)}
.faq-a{padding:0 2px 22px;font-size:15px;line-height:1.8;color:var(--muted);max-width:58ch}

/* ---------- CTA band & form ---------- */
.cta-band{background:linear-gradient(135deg,#12303D 0%,#14536E 100%);color:#C7D6DE}
.cta-inner{display:grid;grid-template-columns:1fr 420px;gap:56px;align-items:center}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,32px);line-height:1.3;margin-bottom:14px}
.cta-band .lead{font-size:16px;line-height:1.9;color:#B9CCD6;max-width:56ch}
.cta-list{margin-top:24px;display:grid;gap:12px}
.cta-list li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:#D3E0E7;line-height:1.7}
.cta-list svg{flex:none;margin-top:4px}
.form-card{
  background:#fff;border-radius:var(--r-card);padding:28px;color:var(--ink-body);
  box-shadow:0 28px 60px -34px rgba(0,0,0,.55);
}
.form-card h3{font-size:19px;margin-bottom:6px}
.form-card .form-hint{font-size:13.5px;color:var(--weak);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;margin-bottom:6px;font-size:13.5px;font-weight:600;color:var(--muted)}
.field input,.field select{
  width:100%;height:46px;padding:0 14px;border-radius:10px;background:#fff;
  border:1px solid var(--line);color:var(--ink);outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field input::placeholder{color:var(--weak)}
.field input:focus,.field select:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--focus)}
.field.error input{border-color:#C0453B}
.field-error{margin-top:6px;font-size:13px;color:#C0453B}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--muted);line-height:1.7;margin:4px 0 18px}
.check-row input{width:16px;height:16px;margin-top:4px;accent-color:var(--brand);flex:none}

/* ---------- Footer ---------- */
.site-footer{background:#12303D;color:#C7D6DE;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;font-size:17px;font-weight:700;color:#fff}
.footer-about{font-size:14px;line-height:1.85;color:#9FB6C1;max-width:36ch}
.footer-title{font-size:14px;font-weight:700;letter-spacing:.06em;color:#fff;margin-bottom:16px}
.footer-link{display:block;font-size:14px;line-height:1.7;color:#C7D6DE;margin-bottom:10px}
.footer-link:hover{color:var(--accent)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:48px;padding:22px 0 28px;border-top:1px solid rgba(199,214,222,.16);
  font-size:13px;color:#8FA6B2;
}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .site-header{
    background:#fff;-webkit-backdrop-filter:none;backdrop-filter:none;
    border-bottom-color:var(--line-soft);
  }
  .header-inner{height:64px}
  .site-header.is-scrolled .header-inner{height:58px}
  .menu-btn{display:inline-flex}
  .main-nav{
    position:fixed;top:0;left:0;right:0;bottom:0;z-index:70;
    display:flex;flex-direction:column;align-items:stretch;gap:2px;
    padding:96px 24px 132px;background:#fff;overflow-y:auto;
    transform:translateX(-100%);transition:transform .28s ease;
  }
  body.menu-open{overflow:hidden}
  body.menu-open .main-nav{transform:translateX(0)}
  .nav-link{font-size:18px;padding:15px 8px;border-radius:0;border-bottom:1px solid var(--line-soft);color:var(--ink)}
  .nav-link.active::after{left:8px;right:auto;width:28px;bottom:6px}
  body.menu-open .header-actions .btn-primary{
    position:fixed;left:24px;right:24px;bottom:20px;z-index:80;height:48px;
  }
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .cta-inner{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .timeline{grid-template-columns:repeat(2,1fr);gap:32px 28px}
  .timeline::before{display:none}
  .tl-item{padding-left:28px}
  .tl-item::before{top:4px;left:0}
}
@media (max-width:768px){
  .section{padding:60px 0}
  .page-hero{padding:112px 0 64px}
  .hero-sub{font-size:16px}
  .scene-grid{grid-template-columns:1fr;gap:20px}
  .scene-wide{grid-column:span 1;flex-direction:column}
  .scene-wide .scene-media{width:100%;min-height:0;aspect-ratio:16/9}
  .scene-wide .scene-body{padding:24px 26px 26px}
  .faq-grid{grid-template-columns:1fr}
  .choice-row{grid-template-columns:1fr;gap:12px;padding:22px}
  .cta-band .lead{max-width:none}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .container{padding:0 20px}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .stat-grid{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr}
  .form-card{padding:22px}
}

/* roulang page: category3 */
:root{
  --brand:#1E6E8F; --brand-deep:#14536E; --brand-soft:#E6F0F5; --brand-line:#CFE1EA;
  --accent:#E07A2F; --accent-hover:#C9681F; --accent-soft:#FDF1E7; --accent-shadow:rgba(224,122,47,.28);
  --success:#2E9E7E;
  --text:#16303C; --text-2:#4A6472; --text-3:#7C93A1; --body:#2B3F4A;
  --bg:#F6F9FB; --bg-alt:#EDF3F7; --card:#FFFFFF;
  --border:#DCE7EE; --divider:#E8EFF4; --focus:rgba(30,110,143,.28);
  --r-card:16px; --r-img:12px; --r-btn:10px; --r-badge:6px;
  --sh-card:0 1px 2px rgba(18,48,61,.06), 0 8px 24px -12px rgba(18,48,61,.12);
  --sh-card-hover:0 2px 4px rgba(18,48,61,.07), 0 18px 36px -16px rgba(18,48,61,.18);
  --sh-nav:0 1px 0 rgba(18,48,61,.06), 0 10px 30px -18px rgba(18,48,61,.24);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.85;color:var(--body);background:var(--bg);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
button{font-family:inherit;cursor:pointer;border:0;background:none}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--text)}
h1,h2,h3,h4{margin:0;color:var(--text);line-height:1.32}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand-deep);outline-offset:2px;border-radius:4px;
}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 容器与板块 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.narrow{max-width:880px;margin:0 auto}
.reading{max-width:780px;margin:0 auto}
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-white{background:var(--card)}
.section-dark{background:#12303D;color:#D7E4EA}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--brand);background:var(--brand-soft);border:1px solid var(--brand-line);
  border-radius:var(--r-badge);padding:4px 10px;margin-bottom:16px;
}
.section-head{max-width:780px;margin-bottom:44px}
.section-title{font-size:clamp(22px,2.6vw,34px);font-weight:700;margin-bottom:12px}
.section-sub{color:var(--text-2);font-size:16px;line-height:1.8;margin:0}
.section-dark .section-title{color:#FFFFFF}
.section-dark .section-sub{color:#B9CDD7}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;text-decoration:none;white-space:nowrap;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .16s ease;
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 20px -12px var(--accent-shadow)}
.btn-primary:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px -12px rgba(224,122,47,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px -10px var(--accent-shadow)}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--brand-line)}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-deep);border-color:var(--brand-line)}
.btn-ghost{background:transparent;color:var(--brand);padding:0;height:auto;font-size:15px}
.btn-ghost .arrow{display:inline-block;transition:transform .2s ease}
.btn-ghost:hover .arrow{transform:translateX(4px)}
.btn-ghost:hover{background:transparent}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none}

/* ---------- 玻璃导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(18,48,61,.08);
  transition:background-color .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.site-header.scrolled{background:#FFFFFF;box-shadow:var(--sh-nav);border-bottom-color:var(--divider)}
.header-inner{display:flex;align-items:center;gap:28px;height:72px;transition:height .22s ease}
.site-header.scrolled .header-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:9px;font-size:18px;font-weight:700;color:var(--text);letter-spacing:-.01em}
.logo:hover{color:var(--brand);text-decoration:none}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:var(--brand-soft);border:1px solid var(--brand-line)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;padding:8px 12px;font-size:15px;color:var(--text-2);border-radius:8px;
  transition:color .2s ease,background-color .2s ease;
}
.nav-link:hover{color:var(--brand);background:var(--brand-soft);text-decoration:none}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;border-radius:2px;background:var(--accent);
}
.nav-cta-mobile{display:none}
.header-actions{display:flex;align-items:center;gap:10px}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;
  color:var(--text-2);border:1px solid transparent;transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.icon-btn:hover{background:var(--brand-soft);color:var(--brand);border-color:var(--brand-line)}
.menu-btn{display:none}
.header-search{display:none;border-top:1px solid var(--divider);background:#fff;padding:14px 0}
.header-search.open{display:block}
.header-search input{
  width:100%;height:46px;border:1px solid var(--border);border-radius:var(--r-btn);
  padding:0 16px;background:#FBFDFE;transition:border-color .2s ease,box-shadow .2s ease;
}
.header-search input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--focus);outline:none}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:#fff;padding-top:120px;padding-bottom:72px}
.hero-bg{
  position:absolute;inset:0;
  background-image:
    linear-gradient(135deg,rgba(255,255,255,.90) 0%,rgba(255,255,255,.74) 50%,rgba(230,240,245,.82) 100%),
    url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center right;
}
.hero-inner{position:relative;z-index:1}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--text-2)}
.breadcrumb .sep{color:var(--brand-line)}
.breadcrumb .current{color:var(--text-3)}
.hero-title{font-size:clamp(30px,4.2vw,52px);font-weight:700;line-height:1.18;letter-spacing:-.01em;max-width:16em;margin-bottom:18px}
.hero-sub{font-size:17px;line-height:1.85;color:var(--text-2);max-width:640px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:32px}

.hero-search{max-width:660px;margin-bottom:26px}
.search-box{
  display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--border);
  border-radius:var(--r-card);padding:8px 8px 8px 18px;box-shadow:var(--sh-card);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px var(--focus),var(--sh-card)}
.search-box .search-icon{display:inline-flex;color:var(--brand);flex:0 0 auto}
.search-box input{
  flex:1;min-width:0;height:42px;border:0;background:transparent;font-size:15px;outline:none;
}
.search-box input::placeholder{color:var(--text-3)}
.search-box .btn{flex:0 0 auto}
.search-hint{font-size:13px;color:var(--text-3);margin:10px 2px 0}

.trust-bar{display:flex;flex-wrap:wrap;gap:10px 24px;padding-top:20px;border-top:1px solid var(--divider);max-width:760px}
.trust-bar li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-3)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--success);flex:0 0 auto}

/* ---------- 步骤列表 ---------- */
.step-list{display:flex;flex-direction:column;gap:20px;max-width:880px;margin:0 auto}
.step-item{
  display:grid;grid-template-columns:96px 1fr;gap:24px;align-items:start;
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-card);transition:box-shadow .24s ease,transform .24s ease;
}
.step-item:hover{box-shadow:var(--sh-card-hover);transform:translateY(-3px)}
.step-num{
  font-size:clamp(40px,6vw,62px);font-weight:700;line-height:1;letter-spacing:-.03em;
  color:var(--brand-line);font-variant-numeric:tabular-nums;padding-top:2px;
}
.step-body h3{font-size:19px;font-weight:600;margin-bottom:10px}
.step-body p{color:var(--text-2);margin-bottom:14px}
.step-points{display:flex;flex-direction:column;gap:8px}
.step-points li{position:relative;padding-left:20px;font-size:15px;color:var(--text-2)}
.step-points li::before{
  content:"";position:absolute;left:0;top:12px;width:9px;height:2px;border-radius:2px;background:var(--accent);
}
.step-note{
  margin-top:16px;background:var(--brand-soft);border-left:3px solid var(--brand);
  border-radius:0 10px 10px 0;padding:12px 16px;font-size:14px;color:var(--brand-deep);
}

/* ---------- 图卡 ---------- */
.figure-wide{max-width:1000px;margin:56px auto 0}
.figure-wide img{width:100%;border-radius:var(--r-img);border:1px solid var(--border);box-shadow:var(--sh-card)}
.figure-wide figcaption{margin-top:12px;text-align:center;font-size:13px;color:var(--text-3)}

/* ---------- 卡点对照 ---------- */
.check-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:stretch}
.check-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-card);transition:box-shadow .24s ease,transform .24s ease;
}
.check-card:hover{box-shadow:var(--sh-card-hover);transform:translateY(-3px)}
.check-card h3{font-size:19px;font-weight:600;margin-bottom:14px}
.plain-list{display:flex;flex-direction:column;gap:12px}
.plain-list li{font-size:15px;color:var(--text-2);padding-left:18px;position:relative}
.plain-list li::before{content:"";position:absolute;left:0;top:12px;width:8px;height:2px;background:var(--brand-line);border-radius:2px}
.plain-list strong{color:var(--text);font-weight:600}
.num-list{counter-reset:n;display:flex;flex-direction:column;gap:12px}
.num-list li{counter-increment:n;position:relative;padding-left:32px;font-size:15px;color:var(--text-2)}
.num-list li::before{
  content:counter(n);position:absolute;left:0;top:3px;width:20px;height:20px;border-radius:6px;
  background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.strip-card{
  grid-column:1 / -1;display:flex;flex-wrap:wrap;align-items:center;gap:18px 28px;
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px 28px;box-shadow:var(--sh-card);margin-top:24px;
}
.strip-card h3{font-size:17px;font-weight:600;margin:0}
.strip-card ul{display:flex;flex-wrap:wrap;gap:10px 20px}
.strip-card li{font-size:14px;color:var(--text-2);display:flex;align-items:center;gap:8px}

/* ---------- FAQ ---------- */
.faq-group{margin-bottom:44px}
.faq-group:last-child{margin-bottom:0}
.faq-group-title{
  display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;color:var(--brand-deep);
  padding-bottom:12px;border-bottom:1px solid var(--divider);margin-bottom:8px;
}
.faq-group-title span.count{
  font-size:12px;font-weight:600;color:var(--brand);background:var(--brand-soft);
  border-radius:var(--r-badge);padding:2px 8px;
}
.faq-item{border-bottom:1px solid var(--divider)}
.faq-h{margin:0}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 4px;text-align:left;font-size:17px;font-weight:600;color:var(--text);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand)}
.faq-q[aria-expanded="true"]{color:var(--brand-deep)}
.faq-icon{position:relative;width:20px;height:20px;flex:0 0 20px;transition:transform .24s ease}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand);border-radius:2px}
.faq-icon::before{left:2px;right:2px;top:9px;height:2px}
.faq-icon::after{top:2px;bottom:2px;left:9px;width:2px;transition:opacity .24s ease}
.faq-q[aria-expanded="true"] .faq-icon{transform:rotate(45deg)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .24s ease}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a-inner p{padding:0 4px 22px;font-size:15px;line-height:1.8;color:var(--text-2);margin:0}
.faq-a-inner strong{color:var(--text);font-weight:600}

/* ---------- CTA 表单 ---------- */
.cta-panel{
  background:#12303D;border-radius:20px;padding:44px;color:#D7E4EA;
  display:grid;grid-template-columns:1fr 420px;gap:48px;align-items:start;
}
.cta-panel h2{color:#fff;font-size:clamp(22px,2.6vw,32px);font-weight:700;margin-bottom:14px}
.cta-panel p{color:#B9CDD7;font-size:15px}
.cta-points{display:flex;flex-direction:column;gap:10px;margin-top:22px}
.cta-points li{display:flex;align-items:center;gap:10px;font-size:14px;color:#C7D6DE}
.cta-points .dot{background:var(--success)}
.form-card{background:#fff;border-radius:var(--r-card);padding:28px;box-shadow:0 24px 48px -28px rgba(0,0,0,.45)}
.form-card h3{font-size:18px;font-weight:600;color:var(--text);margin-bottom:18px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;height:46px;border:1px solid var(--border);border-radius:var(--r-btn);
  padding:0 14px;background:#FBFDFE;transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:auto;min-height:88px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand);box-shadow:0 0 0 3px var(--focus);outline:none;
}
.field.error input,.field.error select{border-color:#C0453B}
.field .err-msg{display:none;font-size:13px;color:#C0453B;margin-top:6px}
.field.error .err-msg{display:block}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--text-2);margin:6px 0 18px}
.check-row input{width:16px;height:16px;margin-top:3px;flex:0 0 auto;accent-color:var(--brand)}
.check-row.error{color:#C0453B}
.form-card .btn{width:100%}
.form-note{font-size:12px;color:var(--text-3);margin-top:12px;text-align:center}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:12px;
  background:#fff;border:1px solid var(--border);color:var(--brand);
  display:flex;align-items:center;justify-content:center;box-shadow:var(--sh-card);
  opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity .24s ease,transform .24s ease,background-color .2s ease,color .2s ease;z-index:70;
}
.to-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
.to-top:hover{background:var(--brand-soft);color:var(--brand-deep)}

/* ---------- 页脚 ---------- */
.site-footer{background:#12303D;color:#C7D6DE;padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px 32px}
.footer-brand{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-brand .logo-mark{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.14);color:#8FC0D6}
.footer-about{font-size:14px;line-height:1.8;color:#9FB7C3;max-width:34em;margin:0}
.footer-title{font-size:14px;font-weight:600;color:#fff;letter-spacing:.06em;margin-bottom:14px}
.footer-link{display:block;font-size:14px;color:#C7D6DE;margin-bottom:10px}
.footer-link:hover{color:var(--accent);text-decoration:none}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.10);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:#8CA5B2;
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .section{padding:72px 0}
  .cta-panel{grid-template-columns:1fr;gap:32px;padding:36px}
  .check-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 24px}
}
@media (max-width:900px){
  .main-nav{
    position:fixed;top:0;left:0;right:0;bottom:0;z-index:90;
    background:#fff;flex-direction:column;align-items:stretch;gap:0;
    padding:88px 24px 100px;margin-left:0;overflow-y:auto;
    transform:translateY(-12px);opacity:0;visibility:hidden;
    transition:opacity .22s ease,transform .22s ease,visibility .22s;
  }
  .main-nav.open{opacity:1;visibility:visible;transform:translateY(0)}
  .main-nav .nav-link{font-size:18px;padding:16px 8px;border-bottom:1px solid var(--divider);border-radius:0}
  .main-nav .nav-link.active::after{left:8px;right:auto;width:28px;bottom:12px}
  .nav-cta-mobile{display:inline-flex;margin-top:24px;width:100%}
  .menu-btn{display:inline-flex}
  body.menu-open{overflow:hidden}
  .header-actions .btn-primary{display:none}
}
@media (max-width:768px){
  .section{padding:64px 0}
  .hero{padding-top:104px;padding-bottom:56px}
  .hero-title{max-width:none}
  .section-head{margin-bottom:32px}
  .step-item{grid-template-columns:1fr;gap:12px;padding:22px}
  .step-num{font-size:38px}
  .figure-wide{margin-top:36px}
  .cta-panel{padding:28px 22px;border-radius:16px}
  .form-card{padding:22px}
  .to-top{right:16px;bottom:20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
}
@media (max-width:520px){
  .container{padding:0 20px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .search-box{flex-wrap:wrap;padding:12px}
  .search-box input{width:100%;flex:1 0 100%;height:38px}
  .search-box .btn{width:100%}
  .trust-bar{gap:8px 16px}
  .faq-q{font-size:16px;padding:16px 2px}
  .strip-card{padding:20px}
}