/* roulang page: index */
:root{
  --ink:#1B1533;
  --ink-deep:#12102A;
  --teal:#2FB6A8;
  --teal-dark:#1F8C81;
  --gold:#E8B455;
  --bg:#F6F3EE;
  --bg-soft:#EFEAE2;
  --card:#FFFFFF;
  --text:#1C1A2E;
  --text-2:#5B5876;
  --text-3:#8B88A3;
  --line:rgba(27,21,51,.08);
  --line-strong:rgba(27,21,51,.18);
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(27,21,51,.04);
  --sh-2:0 18px 40px -20px rgba(27,21,51,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --t-fast:180ms;
  --t-mid:240ms;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",-apple-system,sans-serif;
  --mono:"Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  text-align:left;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;font-size:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-family:var(--serif);font-weight:700;color:var(--ink);letter-spacing:-.01em;}
h1{font-size:clamp(34px,4.6vw,58px);line-height:1.14;letter-spacing:-.02em;}
h2{font-size:clamp(26px,2.6vw,38px);line-height:1.2;}
h3{font-size:20px;line-height:1.35;font-weight:600;}
h4{font-size:16px;line-height:1.5;font-weight:600;font-family:var(--sans);}
p{margin:0;}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:4px;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--soft{background:var(--bg-soft);}
.section--white{background:var(--card);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-head p{margin-top:10px;color:var(--text-2);font-size:15px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:500;letter-spacing:.04em;color:var(--teal-dark);background:rgba(47,182,168,.1);padding:6px 14px;border-radius:var(--r-pill);}
.badge{display:inline-block;font-size:12px;font-weight:500;letter-spacing:.04em;color:var(--teal-dark);background:rgba(47,182,168,.1);padding:4px 12px;border-radius:var(--r-pill);}
.badge--gold{color:#8a6519;background:rgba(232,180,85,.16);}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:500;border:none;cursor:pointer;transition:all var(--t-mid) var(--ease);text-align:center;min-height:48px;}
.btn-primary{background:var(--ink);color:#fff;border-radius:var(--r-pill);padding:0 26px;box-shadow:var(--sh-1);}
.btn-primary:hover{filter:brightness(1.14);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line-strong);border-radius:var(--r-pill);padding:0 22px;min-height:42px;font-size:14px;}
.btn-ghost:hover{background:rgba(27,21,51,.06);}
.btn[disabled],.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;filter:none;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--ink);transition:color var(--t-fast) var(--ease);}
.link-arrow .arw{transition:transform var(--t-mid) var(--ease);}
.link-arrow:hover{color:var(--teal-dark);}
.link-arrow:hover .arw{transform:translateX(4px);}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(246,243,238,.96);border-bottom:1px solid transparent;transition:all var(--t-mid) var(--ease);}
.site-header.is-scrolled{background:rgba(246,243,238,.92);backdrop-filter:blur(8px);border-bottom-color:var(--line);box-shadow:var(--sh-1);}
.nav-top{display:flex;align-items:center;gap:24px;padding:18px 0;transition:padding var(--t-mid) var(--ease);}
.site-header.is-scrolled .nav-top{padding:9px 0;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{position:relative;width:34px;height:34px;flex-shrink:0;}
.brand-mark i{position:absolute;border-radius:50%;display:block;}
.brand-mark i:nth-child(1){width:11px;height:11px;background:var(--ink);left:2px;top:3px;}
.brand-mark i:nth-child(2){width:7px;height:7px;background:var(--teal);right:3px;top:1px;}
.brand-mark i:nth-child(3){width:6px;height:6px;background:var(--ink);left:7px;bottom:3px;}
.brand-mark i:nth-child(4){width:9px;height:9px;background:var(--teal);right:1px;bottom:6px;}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text b{font-family:var(--serif);font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.01em;}
.brand-text span{font-size:11px;letter-spacing:.08em;color:var(--text-3);}
.searchbox{position:relative;flex:1 1 auto;max-width:560px;display:flex;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);height:46px;transition:border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease);}
.searchbox:focus-within{border-color:var(--teal);box-shadow:0 0 0 3px rgba(47,182,168,.18);}
.searchbox svg{margin:0 10px 0 16px;flex-shrink:0;}
.searchbox input{flex:1;border:none;background:transparent;height:100%;outline:none;font-size:14px;color:var(--text);min-width:0;}
.searchbox input::placeholder{color:var(--text-3);}
.searchbox button{height:100%;width:88px;border:none;background:var(--ink);color:#fff;border-radius:0 var(--r-pill) var(--r-pill) 0;cursor:pointer;font-size:14px;transition:filter var(--t-fast) var(--ease);}
.searchbox button:hover{filter:brightness(1.14);}
.nav-actions{display:flex;align-items:center;gap:18px;margin-left:auto;flex-shrink:0;}
.nav-actions .btn-primary{min-height:42px;padding:0 20px;font-size:14px;}
.nav-cats{display:flex;align-items:center;gap:8px;padding-bottom:14px;overflow-x:auto;scrollbar-width:none;transition:max-height var(--t-mid) var(--ease),opacity var(--t-mid) var(--ease),padding var(--t-mid) var(--ease);max-height:60px;}
.nav-cats::-webkit-scrollbar{display:none;}
.site-header.is-scrolled .nav-cats{max-height:0;opacity:0;padding-bottom:0;overflow:hidden;}
.chip{display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:var(--r-pill);font-size:13px;color:var(--text-2);white-space:nowrap;transition:all var(--t-fast) var(--ease);}
.chip:hover{background:rgba(27,21,51,.06);color:var(--ink);}
.chip.is-active{background:var(--ink);color:#fff;}
.chip.is-active:hover{background:var(--ink);color:#fff;}
.mobile-search-toggle{display:none;background:none;border:1px solid var(--line);border-radius:var(--r-pill);width:40px;height:40px;align-items:center;justify-content:center;cursor:pointer;color:var(--ink);}
.mobile-search{display:none;padding:0 0 14px;}
.mobile-search.is-open{display:block;}
.mobile-search form{display:flex;align-items:center;gap:10px;}
.mobile-search .searchbox{max-width:none;flex:1;}
.mobile-search .cancel{background:none;border:none;color:var(--text-2);font-size:14px;cursor:pointer;white-space:nowrap;}

/* ---------- hero ---------- */
.hero{padding:96px 0 72px;background:var(--bg);position:relative;overflow:hidden;}
.hero::after{content:"";position:absolute;right:-60px;top:-40px;width:320px;height:320px;background-image:radial-gradient(rgba(27,21,51,.22) 1.2px,transparent 1.4px);background-size:20px 20px;opacity:.22;pointer-events:none;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;position:relative;z-index:1;}
.hero-copy h1{margin:20px 0 18px;}
.hero-sub{font-size:19px;line-height:1.75;color:var(--text-2);max-width:520px;}
.hero-cta{display:flex;align-items:center;gap:24px;margin-top:32px;flex-wrap:wrap;}
.trust-row{display:flex;gap:32px;margin-top:36px;flex-wrap:wrap;}
.trust-row li{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-2);}
.trust-row svg{flex-shrink:0;}
.hero-media{position:relative;}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-lg);background:var(--bg-soft);box-shadow:var(--sh-1);}
.media-card{position:absolute;right:-12px;bottom:-24px;width:220px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:16px;box-shadow:var(--sh-2);}
.media-card div{display:flex;align-items:baseline;justify-content:space-between;gap:8px;}
.media-card div + div{margin-top:10px;padding-top:10px;border-top:1px solid var(--line);}
.media-card strong{font-family:var(--serif);font-size:20px;color:var(--ink);}
.media-card span{font-size:12px;color:var(--text-3);}

/* ---------- quick bar ---------- */
.quick-bar{background:var(--bg-soft);padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.quick-bar ul{display:flex;gap:12px;overflow-x:auto;scrollbar-width:none;}
.quick-bar ul::-webkit-scrollbar{display:none;}
.quick-bar .chip{height:40px;background:#fff;border:1px solid var(--line);color:var(--text-2);}
.quick-bar .chip:hover{border-color:var(--teal);color:var(--ink);}

/* ---------- story ---------- */
.story-grid{display:grid;grid-template-columns:5fr 7fr;gap:64px;}
.story-left{position:relative;padding-left:28px;}
.ruler{position:absolute;left:0;top:6px;bottom:6px;width:2px;background:var(--line);overflow:hidden;}
.ruler i{position:absolute;left:0;top:0;width:100%;height:0;background:var(--teal);transition:height 700ms var(--ease);}
.ruler.is-on i{height:100%;}
.story-left h2{margin:14px 0 16px;}
.story-left p{color:var(--text-2);font-size:15px;}
.story-block + .story-block{margin-top:32px;padding-top:32px;border-top:1px solid var(--line);}
.story-block h4{margin-bottom:8px;color:var(--ink);}
.story-block p{color:var(--text-2);font-size:15px;}

/* ---------- features ---------- */
.feat-grid{display:grid;grid-template-columns:8fr 4fr;gap:24px;}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);overflow:hidden;transition:border-color var(--t-mid) var(--ease),box-shadow var(--t-mid) var(--ease),transform var(--t-mid) var(--ease);}
.card:hover{border-color:var(--teal);box-shadow:var(--sh-2);}
.card-lg{display:grid;grid-template-columns:40% 60%;}
.card-lg .thumb{overflow:hidden;background:var(--bg-soft);}
.card-lg img{width:100%;height:100%;min-height:220px;object-fit:cover;transition:transform var(--t-mid) var(--ease);}
.card-lg:hover img{transform:scale(1.03);}
.card-body{padding:24px;}
.card-body h3{margin:12px 0 8px;}
.card-body p{color:var(--text-2);font-size:15px;margin-bottom:16px;}
.card-stack{display:flex;flex-direction:column;gap:24px;}
.card-sm img{width:100%;aspect-ratio:3/2;object-fit:cover;background:var(--bg-soft);transition:transform var(--t-mid) var(--ease);}
.card-sm:hover img{transform:scale(1.03);}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 48px;min-height:220px;}
.news-item{display:grid;grid-template-columns:96px 1fr;gap:16px;padding:20px 0;border-bottom:1px solid var(--line);transition:background var(--t-fast) var(--ease);}
.news-item:hover{background:rgba(27,21,51,.03);}
.news-date{font-family:var(--mono);font-size:13px;color:rgba(27,21,51,.6);padding-top:4px;word-break:break-word;}
.news-title{margin:10px 0 8px;font-size:18px;}
.news-title a:hover{color:var(--teal-dark);}
.news-summary{font-size:14px;color:var(--text-2);margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.empty-state{border:1px dashed var(--line-strong);border-radius:var(--r-md);padding:36px 24px;text-align:center;color:var(--text-2);font-size:14px;}
.empty-state p{margin-bottom:16px;}
.skeleton{height:16px;border-radius:var(--r-sm);background:rgba(27,21,51,.06);animation:breathe 1.2s ease-in-out infinite;margin:12px 0;}
.skeleton.w60{width:60%;}
@keyframes breathe{0%,100%{opacity:1}50%{opacity:.45}}

/* ---------- proof ---------- */
.proof-grid{display:grid;grid-template-columns:3fr 9fr;gap:48px;align-items:center;}
.proof-num{font-family:var(--serif);font-size:36px;font-weight:700;color:var(--ink);line-height:1.2;}
.proof-left p{font-size:14px;color:var(--text-2);margin-top:8px;}
.partners{display:grid;grid-template-columns:repeat(4,1fr);gap:18px 24px;}
.partners span{font-size:14px;color:var(--text-3);transition:color var(--t-fast) var(--ease);}
.partners span:hover{color:var(--ink);}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;background:none;border:none;padding:20px 0;text-align:left;cursor:pointer;font-size:16px;font-weight:600;color:var(--ink);font-family:var(--sans);}
.faq-icon{position:relative;width:14px;height:14px;flex-shrink:0;}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--teal-dark);transition:transform var(--t-mid) var(--ease);}
.faq-icon::before{left:0;top:6px;width:14px;height:2px;}
.faq-icon::after{left:6px;top:0;width:2px;height:14px;}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease);}
.faq-a p{padding:0 0 22px;font-size:15px;color:var(--text-2);max-width:820px;}

/* ---------- cta ---------- */
.cta-wrap{padding:0 0 96px;}
.cta-dark{position:relative;background:var(--ink-deep);border-radius:var(--r-lg);padding:64px 48px;overflow:hidden;display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center;}
.cta-dark::before{content:"";position:absolute;left:0;top:0;width:260px;height:180px;background-image:radial-gradient(rgba(255,255,255,.42) 1.2px,transparent 1.4px);background-size:18px 18px;opacity:.22;pointer-events:none;}
.cta-dark h2{color:#F6F3EE;position:relative;}
.cta-dark .cta-desc{color:rgba(246,243,238,.72);font-size:15px;margin-top:12px;position:relative;}
.cta-form{position:relative;display:flex;gap:12px;}
.cta-form input{flex:1;height:48px;border-radius:12px;border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.06);color:#F6F3EE;padding:0 16px;outline:none;transition:border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease);min-width:0;}
.cta-form input::placeholder{color:rgba(246,243,238,.6);}
.cta-form input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(47,182,168,.18);}
.cta-note{position:relative;grid-column:2;font-size:13px;color:rgba(246,243,238,.55);margin-top:12px;}
.form-msg{position:relative;grid-column:2;font-size:13px;margin-top:10px;color:var(--teal);display:none;}
.form-msg.is-error{color:#E99880;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(246,243,238,.78);padding:64px 0 0;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:4fr 2fr 3fr 3fr;gap:40px;padding-bottom:48px;}
.site-footer .brand-text b{color:#F6F3EE;}
.site-footer .brand-text span{color:rgba(246,243,238,.5);}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(246,243,238,.66);max-width:280px;}
.footer-col h4{color:#F6F3EE;font-size:14px;margin-bottom:16px;letter-spacing:.02em;}
.footer-col li{margin-bottom:12px;}
.footer-col a{position:relative;color:rgba(246,243,238,.72);transition:color 160ms var(--ease);display:inline-block;}
.footer-col a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:1px;background:var(--teal);transition:width 160ms var(--ease);}
.footer-col a:hover{color:var(--teal);}
.footer-col a:hover::after{width:100%;}
.footer-col p{color:rgba(246,243,238,.66);line-height:1.9;}
.footer-bottom{border-top:1px solid rgba(246,243,238,.14);padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(246,243,238,.5);}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(8px);transition:opacity 420ms var(--ease),transform 420ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .section{padding:72px 0;}
  .hero{padding:72px 0 56px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-media{order:2;}
  .hero-media img{max-height:320px;}
  .media-card{position:static;width:100%;margin-top:16px;}
  .story-grid{grid-template-columns:1fr;gap:32px;}
  .feat-grid{grid-template-columns:1fr 1fr;}
  .card-lg{grid-template-columns:1fr;}
  .card-lg img{min-height:200px;aspect-ratio:3/2;}
  .proof-grid{grid-template-columns:1fr;gap:28px;}
  .cta-dark{grid-template-columns:1fr;gap:28px;padding:48px 32px;}
  .cta-note,.form-msg{grid-column:1;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .hero{padding:56px 0 48px;}
  .nav-top{gap:12px;padding:14px 0;}
  .searchbox{display:none;}
  .nav-actions .btn-ghost{display:none;}
  .mobile-search-toggle{display:inline-flex;}
  .nav-cats{padding-bottom:12px;}
  .hero-sub{font-size:17px;}
  .hero-cta{gap:16px;}
  .news-grid{grid-template-columns:1fr;gap:0;}
  .news-item{grid-template-columns:1fr;gap:6px;}
  .news-date{padding-top:0;}
  .feat-grid{grid-template-columns:1fr;}
  .partners{grid-template-columns:repeat(2,1fr);}
  .cta-form{flex-direction:column;}
  .cta-form .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .card-body{padding:16px;}
  .cta-dark{padding:36px 20px;}
}
@media (max-width:480px){
  h1{font-size:34px;}
  .brand-text b{font-size:16px;}
  .trust-row{gap:18px;}
  .hero::after{opacity:.14;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --ink:#1B1533;
  --ink-soft:#2A2348;
  --deep:#12102A;
  --teal:#2FB6A8;
  --teal-deep:#1F8C81;
  --teal-wash:rgba(47,182,168,.10);
  --gold:#E8B455;
  --sand:#F6F3EE;
  --surface:#FFFFFF;
  --soft:#EFEAE2;
  --text:#1C1A2E;
  --text-2:#5B5876;
  --text-3:#8B88A3;
  --line:rgba(27,21,51,.08);
  --line-strong:rgba(27,21,51,.16);
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(27,21,51,.04);
  --sh-2:0 18px 40px -20px rgba(27,21,51,.18);
  --sp-1:8px; --sp-2:12px; --sp-3:16px; --sp-4:24px; --sp-5:32px; --sp-6:48px; --sp-7:64px; --sp-8:96px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:240ms;
  --section-y:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--sand);
  color:var(--text);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;background:var(--soft)}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;font-weight:700;color:var(--ink);letter-spacing:-.01em}
p{margin:0}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--section-y) 0}
.section.tight{padding:56px 0}
.section.soft-bg{background:var(--soft)}
.section.white-bg{background:var(--surface)}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  background:var(--teal-wash);color:var(--teal-deep);
  font-size:12px;line-height:1.5;font-weight:500;letter-spacing:.04em;
}
.badge.gold{background:rgba(232,180,85,.14);color:#9A6F14}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,243,238,.94);
  border-bottom:1px solid transparent;
  transition:box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.site-header.is-scrolled{
  background:rgba(246,243,238,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.header-top{
  display:flex;align-items:center;gap:24px;
  min-height:88px;
  transition:min-height var(--dur) var(--ease);
}
.site-header.is-scrolled .header-top{min-height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{position:relative;width:30px;height:34px;flex:0 0 auto;display:block}
.brand-mark i{position:absolute;border-radius:50%;display:block}
.brand-mark i:nth-child(1){width:12px;height:12px;background:var(--ink);top:0;left:9px}
.brand-mark i:nth-child(2){width:7px;height:7px;background:var(--teal);top:12px;left:0}
.brand-mark i:nth-child(3){width:6px;height:6px;background:var(--ink);top:20px;right:2px}
.brand-mark i:nth-child(4){width:4px;height:4px;background:var(--teal);bottom:0;left:11px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-family:"Noto Serif SC","Songti SC",serif;font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.01em}
.brand-text span{font-size:11px;color:var(--text-3);letter-spacing:.16em}

.search{
  position:relative;display:flex;align-items:center;
  flex:1 1 auto;max-width:560px;width:54%;
  height:46px;padding-left:16px;
  background:var(--surface);border:1px solid var(--line-strong);
  border-radius:var(--r-pill);
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.search:focus-within{border-color:var(--teal);box-shadow:0 0 0 3px rgba(47,182,168,.18)}
.search svg{flex:0 0 auto;opacity:.6}
.search input{
  flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;
  padding:0 12px;font-size:15px;outline:none;
}
.search input::placeholder{color:var(--text-3)}
.search-btn{
  flex:0 0 auto;width:88px;height:46px;
  border-radius:0 var(--r-pill) var(--r-pill) 0;
  background:var(--ink);color:#F6F3EE;font-size:15px;font-weight:500;
  transition:background-color var(--dur) var(--ease),filter var(--dur) var(--ease);
}
.search-btn:hover{filter:brightness(1.15)}
.search-btn:active{transform:translateY(1px)}
.header-actions{display:flex;align-items:center;gap:18px;flex:0 0 auto}
.mobile-search-toggle{display:none;width:44px;height:44px;border-radius:var(--r-pill);border:1px solid var(--line-strong);align-items:center;justify-content:center}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:500;white-space:nowrap;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background-color var(--dur) var(--ease),filter var(--dur) var(--ease);
}
.btn-primary{background:var(--ink);color:#F6F3EE;box-shadow:var(--sh-1)}
.btn-primary:hover{filter:brightness(1.1);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  height:42px;padding:0 20px;border-radius:12px;
  border:1px solid rgba(27,21,51,.18);color:var(--text);background:transparent;
}
.btn-ghost:hover{background:rgba(27,21,51,.06)}
.btn-ghost:active{transform:translateY(1px)}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:500;color:var(--ink)}
.link-arrow .arrow{transition:transform var(--dur) var(--ease);display:inline-block}
.link-arrow:hover{color:var(--teal-deep)}
.link-arrow:hover .arrow{transform:translateX(4px)}

.nav-cats{
  display:flex;align-items:center;gap:8px;
  padding:0 0 14px;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  transition:opacity var(--dur) var(--ease),max-height var(--dur) var(--ease);
}
.nav-cats::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;align-items:center;flex:0 0 auto;
  height:34px;padding:0 14px;border-radius:var(--r-pill);
  font-size:13px;color:var(--text-2);
  border:1px solid transparent;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.chip:hover{background:rgba(27,21,51,.06);color:var(--ink)}
.chip.is-active{background:var(--ink);color:#F6F3EE}
.cat-compact{display:none;align-items:center;height:34px;padding:0 14px;border-radius:var(--r-pill);border:1px solid var(--line-strong);font-size:13px;color:var(--text-2)}
.site-header.is-scrolled .nav-cats{display:none}
.site-header.is-scrolled .cat-compact{display:inline-flex}
.mobile-search{display:none;padding:0 0 14px}
.mobile-search.is-open{display:flex;align-items:center;gap:10px}
.mobile-search .search{width:100%;max-width:none}
.mobile-search .cancel{font-size:14px;color:var(--text-2);white-space:nowrap}

/* ---------- 内页头部条 ---------- */
.page-hero{
  position:relative;
  min-height:240px;
  display:flex;align-items:center;
  background-image:linear-gradient(90deg,rgba(246,243,238,.94) 0%,rgba(246,243,238,.82) 55%,rgba(246,243,238,.62) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero .container{padding-top:48px;padding-bottom:48px}
.breadcrumb{font-size:13px;color:var(--text-3);margin-bottom:16px;display:flex;gap:8px;align-items:center}
.breadcrumb a:hover{color:var(--teal-deep)}
.breadcrumb .current{color:var(--text)}
.page-hero h1{
  font-size:clamp(30px,3.8vw,48px);line-height:1.16;letter-spacing:-.02em;
  max-width:18em;
}
.page-hero .lead{
  margin-top:16px;max-width:44em;font-size:17px;line-height:1.75;color:var(--text-2);
}

/* ---------- 通用板块头 ---------- */
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:48px;
}
.section-head h2{font-size:clamp(24px,2.6vw,34px);line-height:1.2;margin-top:12px}
.section-head p{margin-top:8px;color:var(--text-2);font-size:15px;max-width:52em}

/* ---------- 图文交替 ---------- */
.alt-list{display:flex;flex-direction:column;gap:80px}
.alt-row{display:flex;align-items:center;gap:56px}
.alt-row.reverse{flex-direction:row-reverse}
.alt-media{flex:0 0 40%;max-width:40%}
.alt-media img{
  width:100%;aspect-ratio:3/2;object-fit:cover;
  border-radius:var(--r-md);border:1px solid var(--line);box-shadow:var(--sh-1);
}
.alt-body{flex:1 1 auto;min-width:0}
.alt-body h2{font-size:clamp(22px,2.2vw,30px);line-height:1.25;margin:12px 0 16px}
.alt-body p{color:var(--text-2);font-size:16px;line-height:1.85;margin-bottom:12px}
.alt-body .link-arrow{margin-top:12px}

/* ---------- 步骤流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.steps li{
  position:relative;padding:24px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.steps li:hover{border-color:var(--teal);transform:translateY(-2px);box-shadow:var(--sh-2)}
.steps .num{
  font-family:"Inter","Noto Sans SC",monospace;font-size:13px;font-weight:600;
  color:var(--ink);opacity:.45;letter-spacing:.08em;
}
.steps h3{font-size:17px;line-height:1.35;margin:10px 0 8px}
.steps p{font-size:15px;line-height:1.75;color:var(--text-2)}

/* ---------- 要点清单 ---------- */
.check-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px 32px;margin-top:32px}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:16px 20px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);
}
.check-list .dot{
  flex:0 0 auto;width:8px;height:8px;margin-top:9px;border-radius:50%;background:var(--teal);
}
.check-list b{display:block;font-size:15px;font-weight:600;color:var(--ink);margin-bottom:2px}
.check-list span{font-size:14px;color:var(--text-2);line-height:1.7}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);max-width:920px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 4px;font-size:16px;font-weight:600;color:var(--ink);
  cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--teal-deep)}
.faq-item summary::after{
  content:"";position:relative;flex:0 0 auto;width:14px;height:14px;
  background:
    linear-gradient(var(--teal),var(--teal)) center/14px 2px no-repeat,
    linear-gradient(var(--teal),var(--teal)) center/2px 14px no-repeat;
  transition:transform 260ms var(--ease);
}
.faq-item[open] summary::after{
  background:linear-gradient(var(--teal),var(--teal)) center/14px 2px no-repeat;
}
.faq-body{padding:0 4px 24px;font-size:15px;line-height:1.75;color:var(--text-2);max-width:70em}

/* ---------- 深色 CTA ---------- */
.cta-wrap{padding:0 0 var(--section-y)}
.cta{
  position:relative;overflow:hidden;
  background:var(--deep);border-radius:var(--r-lg);
  padding:64px 48px;
  display:flex;align-items:center;gap:40px;justify-content:space-between;
  color:#F6F3EE;
}
.cta::before{
  content:"";position:absolute;top:-40px;left:-20px;width:320px;height:220px;
  background:
    radial-gradient(circle at 20% 30%,rgba(246,243,238,.22) 0 1.4px,transparent 1.6px),
    radial-gradient(circle at 62% 62%,rgba(246,243,238,.18) 0 1.2px,transparent 1.4px),
    radial-gradient(circle at 84% 18%,rgba(47,182,168,.22) 0 1.4px,transparent 1.6px);
  background-size:60px 60px,80px 80px,100px 100px;
  pointer-events:none;
}
.cta-text{position:relative;max-width:34em}
.cta h2{color:#F6F3EE;font-size:clamp(22px,2.4vw,32px);line-height:1.25}
.cta p{margin-top:12px;font-size:15px;color:rgba(246,243,238,.78);line-height:1.75}
.cta .btn-light{
  position:relative;flex:0 0 auto;
  display:inline-flex;align-items:center;height:48px;padding:0 26px;
  border-radius:var(--r-pill);background:#F6F3EE;color:var(--ink);font-size:15px;font-weight:500;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.cta .btn-light:hover{transform:translateY(-1px);box-shadow:0 18px 40px -20px rgba(0,0,0,.6)}

/* ---------- 继续浏览 ---------- */
.next-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.next-card{
  display:block;padding:28px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.next-card:hover{border-color:var(--teal);transform:translateY(-2px);box-shadow:var(--sh-2)}
.next-card h3{font-size:18px;line-height:1.35;margin:10px 0 8px}
.next-card p{font-size:15px;color:var(--text-2);line-height:1.72;margin-bottom:16px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(246,243,238,.78);padding:64px 0 32px}
.site-footer .brand-text b{color:#F6F3EE}
.site-footer .brand-text span{color:rgba(246,243,238,.55)}
.site-footer .brand-mark i:nth-child(1),
.site-footer .brand-mark i:nth-child(3){background:#F6F3EE}
.site-footer .brand-mark i:nth-child(2),
.site-footer .brand-mark i:nth-child(4){background:var(--teal)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-col h4{color:#F6F3EE;font-size:15px;font-family:inherit;font-weight:600;margin-bottom:16px;letter-spacing:.02em}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.75;color:rgba(246,243,238,.62)}
.footer-col ul li{margin-bottom:10px}
.footer-col a,.footer-col p{font-size:14px;line-height:1.75;color:rgba(246,243,238,.72);position:relative}
.footer-col a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:100%;height:1px;
  background:var(--teal);transform:scaleX(0);transform-origin:left;
  transition:transform 160ms var(--ease);
}
.footer-col a:hover{color:var(--teal)}
.footer-col a:hover::after{transform:scaleX(1)}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(246,243,238,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(246,243,238,.55);
}

/* ---------- 动画与骨架 ---------- */
.reveal{opacity:0;transform:translateY(8px);animation:rise 420ms var(--ease) forwards}
@keyframes rise{to{opacity:1;transform:translateY(0)}}
.skeleton{background:var(--soft);border-radius:var(--r-sm);animation:breathe 1.2s ease-in-out infinite}
@keyframes breathe{0%,100%{opacity:1}50%{opacity:.55}}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  :root{--section-y:72px}
  .header-top{min-height:76px}
  .search{width:46%;max-width:420px}
  .alt-row{gap:32px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:860px){
  .search{display:none}
  .mobile-search-toggle{display:inline-flex}
  .header-actions .link-arrow{display:none}
}
@media (max-width:768px){
  :root{--section-y:56px}
  .container{padding:0 20px}
  .header-top{gap:12px;min-height:64px}
  .brand-text b{font-size:17px}
  .btn-primary{height:44px;padding:0 18px;font-size:14px}
  .page-hero{min-height:auto}
  .page-hero .container{padding-top:36px;padding-bottom:36px}
  .section-head{flex-direction:column;align-items:flex-start;margin-bottom:32px}
  .alt-list{gap:48px}
  .alt-row,.alt-row.reverse{flex-direction:column;gap:20px}
  .alt-media{flex:1 1 auto;max-width:100%;width:100%}
  .steps{grid-template-columns:1fr}
  .check-list{grid-template-columns:1fr}
  .cta{flex-direction:column;align-items:flex-start;padding:40px 24px;gap:24px}
  .next-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .brand-mark{width:26px;height:30px}
  .brand-text span{letter-spacing:.08em}
  .faq-item summary{font-size:15px;padding:18px 2px}
  .next-card{padding:20px}
  .check-list li{padding:14px 16px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:0ms !important;transition-duration:0ms !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink:#1B1533;--cyan:#2FB6A8;--cyan-deep:#1F8C81;--gold:#E8B455;
  --bg:#F6F3EE;--surface:#FFFFFF;--soft:#EFEAE2;--dark:#12102A;
  --text:#1C1A2E;--text-2:#5B5876;--text-3:#8B88A3;--on-dark:#F6F3EE;
  --line:rgba(27,21,51,.08);
  --r-sm:8px;--r-md:14px;--r-lg:20px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(27,21,51,.04);
  --sh-2:0 18px 40px -20px rgba(27,21,51,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --t-fast:180ms;--t:240ms;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.85;color:var(--text);background:var(--bg);overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink);margin:0;line-height:1.25;font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-soft{background:var(--soft)}
.section-white{background:var(--surface)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.sec-head h2{font-size:clamp(26px,2.6vw,38px)}
.sec-head p{color:var(--text-2);font-size:15px;margin-top:8px;max-width:620px}
.eyebrow{font-size:12px;letter-spacing:.04em;font-weight:500;color:var(--cyan-deep);background:rgba(47,182,168,.1);border-radius:var(--r-pill);padding:6px 14px;display:inline-flex;align-items:center}

/* 导航 */
.site-header{position:sticky;top:0;z-index:70;background:rgba(246,243,238,.94);border-bottom:1px solid transparent;transition:box-shadow var(--t) var(--ease),background var(--t) var(--ease)}
.site-header.is-compact{background:rgba(246,243,238,.96);border-bottom-color:var(--line);box-shadow:var(--sh-1)}
.nav-top{display:flex;align-items:center;gap:24px;padding:14px 0;transition:padding var(--t) var(--ease)}
.site-header.is-compact .nav-top{padding:8px 0}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{position:relative;width:28px;height:34px;flex-shrink:0}
.brand-mark i{position:absolute;border-radius:50%;display:block}
.brand-mark i:nth-child(1){width:9px;height:9px;background:var(--ink);left:2px;top:2px}
.brand-mark i:nth-child(2){width:6px;height:6px;background:var(--cyan);right:2px;top:8px}
.brand-mark i:nth-child(3){width:7px;height:7px;background:var(--ink);left:6px;bottom:6px}
.brand-mark i:nth-child(4){width:5px;height:5px;background:var(--cyan);right:5px;bottom:1px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-family:var(--serif);font-size:19px;color:var(--ink);letter-spacing:-.01em}
.brand-text span{font-size:11px;color:var(--text-3);letter-spacing:.08em}
.search-form{position:relative;flex:1 1 auto;max-width:560px;min-width:0;display:flex;align-items:center;height:46px;background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);transition:border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease)}
.search-form:focus-within{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(47,182,168,.18)}
.search-form svg{width:18px;height:18px;margin-left:18px;flex-shrink:0;color:var(--ink);opacity:.6}
.search-form input{flex:1;min-width:0;height:100%;border:0;background:transparent;padding:0 12px;font-size:14px;outline:none}
.search-form input::placeholder{color:var(--text-3)}
.search-form button{height:38px;margin-right:4px;padding:0 18px;border:0;border-radius:var(--r-pill);background:var(--ink);color:#fff;font-size:14px;font-weight:500;cursor:pointer;transition:filter var(--t-fast) var(--ease)}
.search-form button:hover{filter:brightness(1.08)}
.nav-actions{display:flex;align-items:center;gap:16px;flex-shrink:0}
.nav-actions .btn{height:44px;padding:0 20px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--ink);transition:color var(--t-fast) var(--ease)}
.link-more span{transition:transform var(--t-fast) var(--ease)}
.link-more:hover{color:var(--cyan-deep)}
.link-more:hover span{transform:translateX(4px)}
.nav-search-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-pill);background:#fff;align-items:center;justify-content:center;cursor:pointer}
.nav-search-toggle svg{width:18px;height:18px;color:var(--ink);opacity:.7}
.mobile-search{display:none;padding:0 24px 14px}
.mobile-search.is-open{display:flex;gap:12px;align-items:center}
.mobile-search .search-form{max-width:none}
.mobile-search .cancel{font-size:14px;color:var(--text-2);flex-shrink:0;background:none;border:0;cursor:pointer;padding:8px 4px}
.nav-cats-wrap{position:relative}
.nav-cats{display:flex;gap:8px;padding:0 0 14px;overflow-x:auto;scrollbar-width:none}
.nav-cats::-webkit-scrollbar{display:none}
.chip{display:inline-flex;align-items:center;height:34px;padding:0 15px;border-radius:var(--r-pill);font-size:13px;color:var(--text-2);white-space:nowrap;border:1px solid transparent;transition:background var(--t-fast) var(--ease),color var(--t-fast) var(--ease);flex-shrink:0}
.chip:hover{background:rgba(27,21,51,.05);color:var(--text)}
.chip.is-active{background:var(--ink);color:var(--on-dark);border-color:var(--ink)}
.site-header.is-compact .nav-cats{display:none}
.cats-entry{display:none;align-items:center;gap:6px;font-size:13px;color:var(--text-2);padding-bottom:10px}
.site-header.is-compact .cats-entry{display:inline-flex}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border:1px solid transparent;border-radius:var(--r-pill);background:var(--ink);color:#fff;font-size:15px;font-weight:500;cursor:pointer;transition:transform var(--t-fast) var(--ease),filter var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease),background var(--t-fast) var(--ease)}
.btn:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn:active{transform:translateY(0)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.btn-ghost{background:transparent;color:var(--ink);border-color:rgba(27,21,51,.18);height:42px}
.btn-ghost:hover{background:rgba(27,21,51,.06);filter:none;box-shadow:none}
.btn-cyan{background:var(--cyan);color:#fff}
.btn-sm{height:40px;padding:0 20px;font-size:14px}

/* 文章头 */
.article-hero{padding:24px 0 48px;border-bottom:1px solid var(--line);background:var(--bg)}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-2)}
.crumbs a{color:var(--text-2);transition:color var(--t-fast) var(--ease)}
.crumbs a:hover{color:var(--cyan-deep)}
.crumbs .sep{color:var(--text-3)}
.crumbs .current{color:var(--text)}
.article-head{margin-top:24px;max-width:900px}
.article-head h1{font-size:clamp(28px,3.4vw,44px);line-height:1.25;margin-top:16px;overflow-wrap:break-word}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:20px;font-size:13px;color:var(--text-2)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);display:inline-block}
.article-cover{margin-top:32px;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);background:var(--soft);aspect-ratio:16/7}
.article-cover img{width:100%;height:100%;object-fit:cover}

/* 文章主体 */
.article-layout{display:block;padding:56px 0 72px}
.article-body{max-width:760px;margin:0 auto;font-size:16px;line-height:1.9;overflow-wrap:break-word}
.article-body p{margin:0 0 1.2em}
.article-body h2{font-size:clamp(22px,2.2vw,28px);margin:40px 0 16px;padding-left:14px;position:relative}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;width:3px;height:18px;border-radius:2px;background:var(--cyan)}
.article-body h3{font-size:20px;margin:32px 0 12px;counter-increment:h3}
.article-body ul{margin:0 0 1.2em;padding-left:4px}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:8px}
.article-body ul li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--cyan)}
.article-body ol{margin:0 0 1.2em;padding-left:22px}
.article-body blockquote{margin:24px 0;padding:20px;background:var(--soft);border-left:3px solid var(--cyan);border-radius:0 var(--r-md) var(--r-md) 0;color:var(--text-2)}
.article-body img{border-radius:var(--r-md);margin:24px auto 12px}
.article-body figcaption{text-align:center;font-size:12px;color:var(--text-3);margin-bottom:24px}
.article-body a{color:var(--ink);background:rgba(47,182,168,.14);border-bottom:1px solid var(--cyan);transition:background var(--t-fast) var(--ease)}
.article-body a:hover{background:rgba(47,182,168,.3)}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.article-body th{background:var(--soft);font-weight:600}
.article-body>p:first-of-type{font-size:19px;line-height:1.75;color:var(--text)}
.table-scroll{overflow-x:auto}

.article-side{display:none}
.article-empty{padding:48px;text-align:center;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1)}
.article-empty p{color:var(--text-2);margin-bottom:20px}

.tag-row{display:flex;flex-wrap:wrap;gap:10px;max-width:760px;margin:48px auto 0;padding-top:24px;border-top:1px solid var(--line)}
.tag{display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--r-pill);border:1px solid var(--line);background:#fff;font-size:13px;color:var(--text-2);transition:border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease)}
.tag:hover{border-color:var(--cyan);color:var(--cyan-deep)}

/* 通用卡片 */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);transition:transform var(--t) var(--ease),border-color var(--t) var(--ease),box-shadow var(--t) var(--ease)}
.card:hover{transform:translateY(-2px);border-color:var(--cyan);box-shadow:var(--sh-2)}
.card-media{aspect-ratio:3/2;overflow:hidden;border-radius:var(--r-md) var(--r-md) 0 0;background:var(--soft)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform var(--t) var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:24px}
.card-body h3{font-size:18px;margin:12px 0 8px}
.card-body p{font-size:15px;color:var(--text-2)}
.card-foot{margin-top:16px}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}

/* 深色 CTA */
.cta-band{background:var(--dark);border-radius:var(--r-lg);padding:64px 48px;position:relative;overflow:hidden;color:var(--on-dark)}
.cta-band::before{content:"";position:absolute;left:0;top:0;width:45%;height:55%;background-image:radial-gradient(rgba(255,255,255,.22) 1px,transparent 1.4px);background-size:18px 18px;opacity:.5;pointer-events:none}
.cta-inner{position:relative;display:grid;grid-template-columns:repeat(2,1fr);gap:40px;align-items:center}
.cta-band h2{color:var(--on-dark);font-size:clamp(24px,2.4vw,32px)}
.cta-band p{color:rgba(246,243,238,.78);font-size:15px;margin-top:10px}
.cta-form{display:flex;gap:12px}
.cta-form input{flex:1;min-width:0;height:48px;padding:0 18px;border-radius:12px;border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.06);color:var(--on-dark);outline:none;transition:border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease)}
.cta-form input::placeholder{color:rgba(246,243,238,.55)}
.cta-form input:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(47,182,168,.18)}
.cta-note{font-size:13px;color:rgba(246,243,238,.6);margin-top:14px}
.form-msg{font-size:14px;margin-top:12px;color:var(--cyan)}
.form-msg.is-error{color:#F0A99B}

/* FAQ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;padding:20px 0;background:none;border:0;cursor:pointer;font-size:16px;font-weight:600;color:var(--ink)}
.faq-q .icon{position:relative;width:16px;height:16px;flex-shrink:0}
.faq-q .icon::before,.faq-q .icon::after{content:"";position:absolute;background:var(--ink);border-radius:2px;transition:transform var(--t) var(--ease),background var(--t) var(--ease)}
.faq-q .icon::before{left:0;top:7px;width:16px;height:2px}
.faq-q .icon::after{left:7px;top:0;width:2px;height:16px}
.faq-item.is-open .faq-q .icon::after{transform:rotate(90deg);background:var(--cyan)}
.faq-item.is-open .faq-q{color:var(--cyan-deep)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease)}
.faq-a p{padding:0 0 20px;font-size:15px;line-height:1.75;color:var(--text-2);max-width:760px}

/* 服务与流程 */
.step-list{display:grid;gap:16px;counter-reset:step}
.step{display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:22px 24px;box-shadow:var(--sh-1)}
.step-index{font-family:var(--mono);font-size:14px;color:var(--cyan-deep);background:rgba(47,182,168,.1);border-radius:var(--r-sm);padding:4px 10px;height:fit-content}
.step h3{font-size:17px;margin-bottom:6px}
.step p{font-size:15px;color:var(--text-2)}

/* 页脚 */
.site-footer{background:var(--ink);color:rgba(246,243,238,.78);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.site-footer .brand-text b{color:var(--on-dark)}
.site-footer .brand-text span{color:rgba(246,243,238,.55)}
.site-footer .brand-mark i:nth-child(1),.site-footer .brand-mark i:nth-child(3){background:var(--on-dark)}
.footer-desc{font-size:14px;line-height:1.75;margin-top:16px;color:rgba(246,243,238,.7);max-width:280px}
.footer-col h4{color:var(--on-dark);font-size:15px;margin-bottom:16px;font-family:var(--sans);font-weight:600}
.footer-col ul li{margin-bottom:10px}
.footer-col p{font-size:14px;margin-bottom:8px;color:rgba(246,243,238,.7)}
.footer-col a{position:relative;display:inline-block;font-size:14px;color:rgba(246,243,238,.78);transition:color var(--t-fast) var(--ease)}
.footer-col a::after{content:"";position:absolute;left:0;bottom:-2px;width:100%;height:1px;background:var(--cyan);transform:scaleX(0);transform-origin:left;transition:transform 160ms var(--ease)}
.footer-col a:hover{color:var(--cyan)}
.footer-col a:hover::after{transform:scaleX(1)}
.footer-bottom{border-top:1px solid rgba(246,243,238,.14);padding:20px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:rgba(246,243,238,.55)}

/* 动效 */
.reveal{opacity:0;transform:translateY(8px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:0ms !important;animation-duration:0ms !important}
  .reveal{opacity:1;transform:none}
}

/* 断点 */
@media (min-width:1200px){
  .article-layout .article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:48px;max-width:1060px;margin:0 auto}
  .article-body{margin:0}
  .article-side{display:block}
  .toc{position:sticky;top:120px;font-size:14px}
  .toc h4{font-family:var(--sans);font-size:12px;letter-spacing:.08em;color:var(--text-3);margin-bottom:14px;font-weight:500;text-transform:uppercase}
  .toc a{display:block;padding:7px 0 7px 12px;border-left:2px solid var(--line);color:var(--text-2);font-size:13px;transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease)}
  .toc a:hover{color:var(--ink)}
  .toc a.is-current{color:var(--ink);border-left-color:var(--cyan);font-weight:500}
}
@media (max-width:1024px){
  .search-form{max-width:420px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{grid-template-columns:1fr;gap:24px}
}
@media (max-width:900px){
  .nav-actions .link-more{display:none}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .container{padding:0 20px}
  .article-hero{padding:20px 0 36px}
  .article-layout{padding:40px 0 56px}
  .nav-top{gap:12px;padding:12px 0}
  .search-form{display:none}
  .nav-search-toggle{display:inline-flex}
  .mobile-search{padding:0 20px 12px}
  .nav-actions .btn{height:40px;padding:0 16px;font-size:14px}
  .brand-text b{font-size:17px}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .cta-band{padding:40px 20px}
  .cta-form{flex-direction:column}
  .article-cover{aspect-ratio:3/2}
  .tag-row{margin-top:32px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .sec-head{flex-direction:column;align-items:flex-start;margin-bottom:28px}
}
@media (max-width:520px){
  .card-body{padding:16px}
  .article-head h1{font-size:30px}
  .crumbs{font-size:12px}
  .step{flex-direction:column;gap:10px}
}
@media (max-width:480px){
  .article-body{font-size:15.5px}
  .article-head h1{font-size:28px}
}

/* roulang page: category2 */
:root{
  --ink:#1B1533;
  --ink-deep:#12102A;
  --teal:#2FB6A8;
  --teal-deep:#1F8C81;
  --gold:#E8B455;
  --bg:#F6F3EE;
  --bg-soft:#EFEAE2;
  --card:#FFFFFF;
  --text:#1C1A2E;
  --text-2:#5B5876;
  --text-3:#8B88A3;
  --line:rgba(27,21,51,.08);
  --line-strong:rgba(27,21,51,.18);
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(27,21,51,.04);
  --sh-2:0 18px 40px -20px rgba(27,21,51,.18);
  --sp-1:8px;
  --sp-2:12px;
  --sp-3:16px;
  --sp-4:24px;
  --sp-5:32px;
  --sp-6:48px;
  --sp-7:64px;
  --sp-8:96px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:420ms;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",-apple-system,sans-serif;
  --font-num:"Inter",ui-monospace,"SFMono-Regular",Menlo,monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  text-align:left;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-md);object-fit:cover;}
a{color:inherit;text-decoration:none;transition:color 200ms var(--ease);}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:0;background:none;color:inherit;}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink);margin:0;font-weight:700;line-height:1.2;}
h1{font-size:clamp(34px,4.2vw,52px);line-height:1.12;letter-spacing:-.02em;}
h2{font-size:clamp(26px,2.6vw,34px);}
h3{font-size:20px;line-height:1.35;font-weight:600;}
h4{font-size:16px;font-weight:600;line-height:1.5;}
p{margin:0 0 var(--sp-3);color:var(--text-2);}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:4px;}

.container{max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--soft{background:var(--bg-soft);}
.section--white{background:#fff;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,243,238,.94);
  border-bottom:1px solid transparent;
  transition:box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:var(--sh-1);
  background:rgba(246,243,238,.92);
  backdrop-filter:blur(8px);
}
.nav-top{
  display:flex;align-items:center;gap:var(--sp-4);
  height:88px;
  transition:height 220ms var(--ease);
}
.site-header.is-scrolled .nav-top{height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{position:relative;width:34px;height:34px;display:block;flex:0 0 34px;}
.brand-mark i{position:absolute;border-radius:50%;display:block;}
.brand-mark i:nth-child(1){width:11px;height:11px;background:var(--ink);top:2px;left:1px;}
.brand-mark i:nth-child(2){width:7px;height:7px;background:var(--teal);top:16px;left:7px;}
.brand-mark i:nth-child(3){width:9px;height:9px;background:var(--ink);top:16px;left:20px;opacity:.7;}
.brand-mark i:nth-child(4){width:5px;height:5px;background:var(--teal);top:3px;left:20px;}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text b{font-family:var(--font-serif);font-size:17px;color:var(--ink);letter-spacing:.01em;font-weight:700;}
.brand-text span{font-size:11px;color:var(--text-3);letter-spacing:.14em;}
.nav-search{
  flex:1 1 auto;max-width:560px;margin:0 auto;
  display:flex;align-items:center;
  height:46px;background:#fff;border:1px solid var(--line-strong);
  border-radius:var(--r-pill);padding:0 3px 0 14px;
  transition:border-color 200ms var(--ease),box-shadow 200ms var(--ease);
}
.nav-search:focus-within{border-color:var(--teal);box-shadow:0 0 0 3px rgba(47,182,168,.18);}
.nav-search svg{flex:0 0 18px;width:18px;height:18px;stroke:rgba(27,21,51,.6);}
.nav-search input{
  flex:1 1 auto;border:0;background:transparent;height:100%;
  padding:0 10px;color:var(--text);font-size:15px;outline:none;min-width:0;
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-search button{
  flex:0 0 88px;height:40px;border-radius:var(--r-pill);
  background:var(--ink);color:#fff;font-size:14px;font-weight:500;
  transition:filter 200ms var(--ease),transform 200ms var(--ease);
}
.nav-search button:hover{filter:brightness(1.14);}
.nav-search button:active{transform:translateY(1px);}
.nav-actions{display:flex;align-items:center;gap:var(--sp-3);flex:0 0 auto;}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  background:var(--ink);color:#fff;font-size:15px;font-weight:500;
  transition:filter 220ms var(--ease),transform 220ms var(--ease),box-shadow 220ms var(--ease);
}
.btn-primary:hover{filter:brightness(1.16);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  height:42px;padding:0 20px;border-radius:var(--r-pill);
  border:1px solid var(--line-strong);color:var(--text);font-size:14px;
  background:transparent;transition:background 200ms var(--ease),border-color 200ms var(--ease);
}
.btn-ghost:hover{background:rgba(27,21,51,.06);border-color:var(--teal);}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;color:var(--text);font-weight:500;
}
.link-arrow svg{width:16px;height:16px;transition:transform 220ms var(--ease);}
.link-arrow:hover{color:var(--teal);}
.link-arrow:hover svg{transform:translateX(4px);}
.nav-search-toggle{display:none;}
.nav-mobile-search{display:none;}
.nav-cats-wrap{position:relative;padding-bottom:12px;}
.nav-cats{
  display:flex;gap:8px;flex-wrap:nowrap;overflow-x:auto;
  padding-bottom:2px;scrollbar-width:none;-webkit-overflow-scrolling:touch;
}
.nav-cats::-webkit-scrollbar{display:none;}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:var(--r-pill);font-size:13px;color:var(--text-2);
  white-space:nowrap;border:1px solid transparent;
  transition:background 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.chip:hover{background:rgba(27,21,51,.06);color:var(--ink);}
.chip.is-active{background:var(--ink);color:#F6F3EE;border-color:var(--ink);}
.site-header.is-scrolled .nav-cats-wrap{display:none;}

/* ---------- page banner ---------- */
.page-banner{
  position:relative;min-height:240px;display:flex;align-items:center;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  overflow:hidden;
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(246,243,238,.94) 0%,rgba(246,243,238,.82) 55%,rgba(246,243,238,.62) 100%);
}
.page-banner .container{position:relative;z-index:2;padding-top:32px;padding-bottom:32px;}
.crumbs{font-size:13px;color:var(--text-3);margin-bottom:14px;}
.crumbs a{color:var(--text-3);}
.crumbs a:hover{color:var(--teal);}
.crumbs span{margin:0 8px;color:var(--text-3);}
.crumbs b{color:var(--text);font-weight:500;}
.page-banner h1{max-width:760px;}
.page-banner .banner-sub{margin:14px 0 0;font-size:16px;color:var(--text-2);max-width:640px;}
.banner-badge{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;
  border-radius:var(--r-pill);background:rgba(47,182,168,.12);
  color:var(--teal-deep);font-size:12px;font-weight:500;letter-spacing:.04em;
  margin-bottom:18px;
}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-pill);background:rgba(47,182,168,.12);
  color:var(--teal-deep);font-size:12px;font-weight:500;letter-spacing:.04em;
}
.badge--gold{background:rgba(232,180,85,.16);color:#9A7325;}

/* ---------- layout ---------- */
.layout-qa{
  display:grid;grid-template-columns:3fr 9fr;gap:var(--sp-6);
  align-items:start;padding:80px 0 96px;
}
.anchor-list{position:sticky;top:104px;}
.anchor-title{
  font-size:12px;letter-spacing:.14em;color:var(--text-3);
  margin-bottom:14px;text-transform:uppercase;
}
.anchor-list a{
  display:flex;gap:12px;align-items:flex-start;
  padding:12px 12px 12px 14px;border-left:3px solid transparent;
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--text-2);font-size:14px;line-height:1.6;
  transition:background 200ms var(--ease),border-color 200ms var(--ease),color 200ms var(--ease);
}
.anchor-list a:hover{background:rgba(27,21,51,.04);color:var(--ink);}
.anchor-list a.is-active{
  border-left-color:var(--teal);color:var(--ink);font-weight:500;
  background:rgba(47,182,168,.07);
}
.anchor-list .idx{font-family:var(--font-num);font-size:13px;color:var(--text-3);flex:0 0 22px;padding-top:1px;}
.anchor-list a.is-active .idx{color:var(--teal-deep);}

.qa-intro{margin-bottom:var(--sp-5);}
.qa-intro h2{margin-bottom:12px;}
.qa-intro p{font-size:16px;}
.qa-card{
  background:var(--card);border:1px solid var(--line);
  border-left:3px solid rgba(27,21,51,.12);
  border-radius:var(--r-md);box-shadow:var(--sh-1);
  margin-bottom:var(--sp-3);overflow:hidden;
  transition:border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.qa-card:hover{border-color:rgba(47,182,168,.5);}
.qa-card.is-open{border-left-color:var(--teal);box-shadow:var(--sh-2);}
.qa-head{
  width:100%;display:flex;align-items:center;gap:var(--sp-3);
  padding:20px var(--sp-4);text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);
}
.qa-head .num{font-family:var(--font-num);font-size:13px;color:var(--text-3);flex:0 0 auto;}
.qa-head .q-text{flex:1 1 auto;}
.qa-head .arrow{
  flex:0 0 22px;width:22px;height:22px;border-radius:50%;
  border:1px solid var(--line-strong);position:relative;
  transition:transform 220ms var(--ease),border-color 220ms var(--ease);
}
.qa-head .arrow::before{
  content:"";position:absolute;left:50%;top:50%;width:9px;height:9px;
  border-right:1.5px solid var(--text-2);border-bottom:1.5px solid var(--text-2);
  transform:translate(-50%,-70%) rotate(45deg);
}
.qa-card.is-open .qa-head .arrow{transform:rotate(180deg);border-color:var(--teal);}
.qa-body{
  max-height:0;overflow:hidden;
  transition:max-height 260ms var(--ease);
}
.qa-body-inner{padding:0 var(--sp-4) 22px 60px;font-size:15px;color:var(--text-2);line-height:1.75;}
.qa-body-inner p{margin-bottom:10px;font-size:15px;}
.qa-body-inner ul{margin:12px 0;}
.qa-body-inner ul li{position:relative;padding-left:16px;margin-bottom:8px;font-size:15px;}
.qa-body-inner ul li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;
  border-radius:50%;background:var(--teal);
}
.note{
  background:var(--bg-soft);border-left:3px solid var(--teal);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  padding:14px 18px;margin:14px 0;font-size:14px;color:var(--text-2);
}

/* ---------- steps strip ---------- */
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);gap:var(--sp-4);
  margin:0 0 var(--sp-6);
}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px;box-shadow:var(--sh-1);
  transition:transform 220ms var(--ease),border-color 220ms var(--ease);
}
.step:hover{transform:translateY(-2px);border-color:var(--teal);}
.step .sn{font-family:var(--font-num);font-size:13px;color:var(--teal-deep);letter-spacing:.08em;}
.step h4{margin:6px 0 6px;}
.step p{font-size:13px;margin:0;color:var(--text-3);}

/* ---------- more links ---------- */
.more-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-4);}
.more-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:var(--sp-4);box-shadow:var(--sh-1);
  display:flex;flex-direction:column;gap:10px;
  transition:transform 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.more-card:hover{transform:translateY(-2px);border-color:var(--teal);box-shadow:var(--sh-2);}
.more-card h3{font-size:18px;}
.more-card p{font-size:14px;margin:0;}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink-deep);border-radius:var(--r-lg);
  padding:56px 48px;color:#F6F3EE;
  display:grid;grid-template-columns:6fr 6fr;gap:var(--sp-6);align-items:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(246,243,238,.22) 1px,transparent 1.4px);
  background-size:64px 64px;opacity:.35;pointer-events:none;
}
.cta-band > *{position:relative;z-index:2;}
.cta-band h2{color:#F6F3EE;font-size:clamp(24px,2.2vw,30px);}
.cta-band p{color:rgba(246,243,238,.72);margin:12px 0 0;font-size:15px;}
.cta-form{display:flex;gap:10px;flex-wrap:wrap;}
.cta-form input{
  flex:1 1 240px;height:48px;border-radius:12px;
  border:1px solid rgba(246,243,238,.28);background:rgba(246,243,238,.06);
  color:#F6F3EE;padding:0 16px;outline:none;font-size:15px;
  transition:border-color 200ms var(--ease),box-shadow 200ms var(--ease);
}
.cta-form input::placeholder{color:rgba(246,243,238,.5);}
.cta-form input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(47,182,168,.22);}
.cta-form .btn-primary{background:var(--teal);color:#08211E;}
.cta-form .btn-primary:hover{filter:brightness(1.08);}
.cta-hint{margin-top:12px;font-size:13px;color:rgba(246,243,238,.55);}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#F6F3EE;padding:64px 0 24px;margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:var(--sp-6);}
.footer-col h4{color:#F6F3EE;font-size:14px;letter-spacing:.06em;margin-bottom:16px;}
.footer-col p{color:rgba(246,243,238,.62);font-size:14px;margin:0 0 8px;}
.footer-desc{color:rgba(246,243,238,.62);font-size:14px;margin-top:14px;max-width:280px;}
.site-footer .brand-text b{color:#F6F3EE;}
.site-footer .brand-text span{color:rgba(246,243,238,.55);}
.site-footer .brand-mark i:nth-child(1),
.site-footer .brand-mark i:nth-child(3){background:#F6F3EE;opacity:.85;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{
  position:relative;font-size:14px;color:rgba(246,243,238,.72);
  display:inline-block;transition:color 160ms var(--ease);
}
.footer-col ul a::after{
  content:"";position:absolute;left:0;bottom:-2px;height:1px;width:0;
  background:var(--teal);transition:width 160ms var(--ease);
}
.footer-col ul a:hover{color:var(--teal);}
.footer-col ul a:hover::after{width:100%;}
.footer-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(246,243,238,.12);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:rgba(246,243,238,.5);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(8px);}
.reveal.is-in{opacity:1;transform:none;transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .container{max-width:1200px;}
}
@media (max-width:1024px){
  .nav-top{height:76px;gap:16px;}
  .brand-text b{font-size:15px;}
  .layout-qa{grid-template-columns:1fr;gap:var(--sp-5);padding-top:56px;}
  .anchor-list{position:static;}
  .anchor-list .anchor-items{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding-bottom:6px;}
  .anchor-list .anchor-items::-webkit-scrollbar{display:none;}
  .anchor-list a{
    flex:0 0 auto;border-left:0;border:1px solid var(--line-strong);
    border-radius:var(--r-pill);padding:8px 16px;font-size:13px;background:#fff;
  }
  .anchor-list a.is-active{border-color:var(--ink);background:var(--ink);color:#F6F3EE;}
  .anchor-list a.is-active .idx{color:rgba(246,243,238,.7);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .more-grid{grid-template-columns:1fr 1fr;}
  .cta-band{grid-template-columns:1fr;padding:44px 32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .section{padding:56px 0;}
  .container{padding:0 20px;}
  .nav-search{display:none;}
  .nav-actions .btn-ghost{display:none;}
  .nav-search-toggle{
    display:inline-flex;align-items:center;justify-content:center;
    width:40px;height:40px;border-radius:var(--r-pill);
    border:1px solid var(--line-strong);background:#fff;
  }
  .nav-search-toggle svg{width:18px;height:18px;stroke:var(--ink);opacity:.7;}
  .nav-mobile-search{
    padding:0 0 12px;display:none;gap:10px;align-items:center;
  }
  .nav-mobile-search.is-open{display:flex;}
  .nav-mobile-search .nav-search{display:flex;flex:1 1 auto;max-width:none;margin:0;}
  .page-banner{min-height:200px;}
  .qa-head{padding:16px;}
  .qa-body-inner{padding:0 16px 18px;}
  .steps{grid-template-columns:1fr;}
  .more-grid{grid-template-columns:1fr;}
  .cta-band{padding:36px 24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .site-footer{margin-top:56px;padding-top:48px;}
}
@media (max-width:520px){
  h1{font-size:34px;}
  .brand-text b{font-size:14px;}
  .brand-text span{font-size:10px;letter-spacing:.1em;}
  .banner-badge{margin-bottom:12px;}
  .qa-head{font-size:15px;gap:10px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:0ms !important;animation-duration:0ms !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
  --ink:#1B1533;
  --ink-deep:#12102A;
  --teal:#2FB6A8;
  --teal-deep:#1F8C81;
  --gold:#E8B455;
  --sand:#F6F3EE;
  --sand-2:#EFEAE2;
  --card:#FFFFFF;
  --text:#1C1A2E;
  --text-2:#5B5876;
  --text-3:#8B88A3;
  --white:#F6F3EE;
  --line:1px solid rgba(27,21,51,.08);
  --line-strong:1px solid rgba(27,21,51,.18);
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(27,21,51,.04);
  --sh-2:0 18px 40px -20px rgba(27,21,51,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --t-fast:180ms;
  --t:240ms;
  --t-slow:420ms;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--sand);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  text-align:left;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink);margin:0;font-weight:700;letter-spacing:-.01em;}
h1{font-size:clamp(34px,4.6vw,58px);line-height:1.12;letter-spacing:-.02em;}
h2{font-size:clamp(26px,2.6vw,38px);line-height:1.2;}
h3{font-size:20px;line-height:1.35;font-weight:600;}
h4{font-size:16px;line-height:1.5;font-weight:600;}
p{margin:0 0 16px;color:var(--text-2);}
p:last-child{margin-bottom:0;}
a{color:inherit;text-decoration:none;transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease);}
img{display:block;max-width:100%;height:auto;background:var(--sand-2);}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
::selection{background:rgba(47,182,168,.22);}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-sand{background:var(--sand-2);}
.section-white{background:var(--card);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.section-head p{margin:8px 0 0;max-width:640px;font-size:15px;line-height:1.72;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:500;letter-spacing:.04em;color:var(--teal-deep);background:rgba(47,182,168,.1);border-radius:var(--r-pill);padding:5px 12px;}
.eyebrow.gold{color:#8a6318;background:rgba(232,180,85,.16);}
.divider{height:1px;background:rgba(27,21,51,.08);border:0;margin:0;}

/* ---------- 头部与导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(246,243,238,.94);border-bottom:var(--line);transition:box-shadow var(--t) var(--ease),background-color var(--t) var(--ease);}
.site-header.is-scrolled{box-shadow:var(--sh-1);background:rgba(246,243,238,.96);}
.header-top{display:flex;align-items:center;gap:24px;padding-top:18px;padding-bottom:18px;transition:padding var(--t) var(--ease);}
.site-header.is-scrolled .header-top{padding-top:8px;padding-bottom:8px;}
.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{position:relative;display:block;width:34px;height:34px;border-radius:10px;background:rgba(27,21,51,.06);}
.brand-mark i{position:absolute;display:block;border-radius:50%;}
.brand-mark i:nth-child(1){width:8px;height:8px;left:6px;top:7px;background:var(--ink);}
.brand-mark i:nth-child(2){width:5px;height:5px;left:19px;top:5px;background:var(--teal);}
.brand-mark i:nth-child(3){width:6px;height:6px;left:9px;top:21px;background:var(--teal);}
.brand-mark i:nth-child(4){width:4px;height:4px;left:22px;top:20px;background:var(--ink);}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-family:var(--font-serif);font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.01em;}
.brand-text span{font-size:12px;color:var(--text-2);letter-spacing:.16em;}
.search-box{display:flex;align-items:center;flex:1 1 auto;max-width:560px;height:46px;background:var(--card);border:var(--line-strong);border-radius:var(--r-pill);padding-left:16px;overflow:hidden;transition:border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease);}
.search-box:focus-within{border-color:var(--teal);box-shadow:0 0 0 3px rgba(47,182,168,.18);}
.search-icon{width:18px;height:18px;flex:0 0 auto;color:rgba(27,21,51,.6);}
.search-box input{flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;padding:0 12px;font-size:15px;outline:none;}
.search-box input::placeholder{color:var(--text-3);}
.search-btn{flex:0 0 auto;width:88px;height:100%;border:0;border-radius:0 var(--r-pill) var(--r-pill) 0;background:var(--ink);color:#fff;font-size:15px;font-weight:500;transition:background-color var(--t-fast) var(--ease);}
.search-btn:hover{background:#2a2350;}
.header-actions{display:flex;align-items:center;gap:18px;flex:0 0 auto;}
.header-link{font-size:14px;color:var(--text-2);border-bottom:1px solid transparent;}
.header-link:hover{color:var(--teal-deep);border-bottom-color:var(--teal);}
.search-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border:var(--line);border-radius:var(--r-pill);background:var(--card);}
.search-toggle svg{width:18px;height:18px;color:var(--ink);}
.mobile-search{display:flex;gap:12px;align-items:center;padding:0 20px 14px;}
.mobile-search .search-box{max-width:none;width:100%;}
.search-cancel{border:0;background:transparent;color:var(--text-2);font-size:14px;padding:10px 4px;}
.header-cats{padding-bottom:14px;transition:padding var(--t) var(--ease);}
.nav-cats{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding:2px 0;}
.nav-cats::-webkit-scrollbar{display:none;}
.chip{display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:var(--r-pill);font-size:13px;color:var(--text-2);background:transparent;border:1px solid transparent;white-space:nowrap;transition:background-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease);}
.chip:hover{background:rgba(27,21,51,.06);color:var(--ink);}
.chip.is-active{background:var(--ink);color:var(--white);}
.chip.is-active:hover{background:var(--ink);}
.site-header.is-scrolled .header-cats{display:none;}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:var(--r-pill);border:1px solid transparent;font-size:15px;font-weight:500;transition:transform var(--t-fast) var(--ease),box-shadow var(--t) var(--ease),background-color var(--t-fast) var(--ease),filter var(--t-fast) var(--ease),color var(--t-fast) var(--ease);}
.btn-primary{background:var(--ink);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;border:var(--line-strong);color:var(--text);height:42px;border-radius:12px;}
.btn-ghost:hover{background:rgba(27,21,51,.06);}
.btn-sm{height:42px;padding:0 20px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--ink);}
.link-arrow svg{width:16px;height:16px;transition:transform var(--t) var(--ease);}
.link-arrow:hover{color:var(--teal-deep);}
.link-arrow:hover svg{transform:translateX(4px);}

/* ---------- 页头 ---------- */
.page-head{position:relative;background:var(--sand-2) url('/assets/images/backpic/back-3.png') center/cover no-repeat;overflow:hidden;}
.page-head::after{content:"";position:absolute;inset:0;background:rgba(246,243,238,.78);}
.page-head .container{position:relative;z-index:2;padding-top:56px;padding-bottom:56px;min-height:240px;display:flex;flex-direction:column;justify-content:center;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-2);margin-bottom:18px;}
.crumb a:hover{color:var(--teal-deep);}
.crumb span.sep{color:var(--text-3);}
.crumb .current{color:var(--text);}
.page-head h1{max-width:820px;}
.page-head .lead{margin-top:16px;font-size:19px;line-height:1.75;color:var(--text-2);max-width:660px;}
.star-dots{position:absolute;inset:auto 0 0 auto;width:280px;height:200px;background-image:radial-gradient(circle,rgba(27,21,51,.22) 1px,transparent 1.4px),radial-gradient(circle,rgba(47,182,168,.24) 1px,transparent 1.4px);background-size:46px 46px,72px 72px;background-position:0 0,20px 26px;opacity:.5;z-index:1;}

/* ---------- 筛选条 ---------- */
.filter-bar{background:var(--card);border-bottom:var(--line);}
.filter-inner{display:flex;align-items:center;gap:16px;padding:20px 0;flex-wrap:wrap;}
.filter-label{font-size:13px;color:var(--text-3);letter-spacing:.04em;flex:0 0 auto;}
.filter-chips{display:flex;gap:10px;overflow-x:auto;scrollbar-width:none;padding:2px 0;}
.filter-chips::-webkit-scrollbar{display:none;}
.chip-filter{height:36px;padding:0 18px;border:var(--line-strong);background:var(--card);color:var(--text-2);font-size:13px;}
.chip-filter:hover{background:rgba(27,21,51,.04);color:var(--ink);}
.chip-filter.is-selected{background:rgba(47,182,168,.12);border-color:var(--teal);color:var(--teal-deep);font-weight:500;}

/* ---------- 卡片网格（清单 / 不等高） ---------- */
.grid-topic{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:start;}
.topic-card{display:flex;flex-direction:column;background:var(--card);border:var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);overflow:hidden;transition:transform var(--t) var(--ease),box-shadow var(--t) var(--ease),border-color var(--t) var(--ease);}
.topic-card:hover{transform:translateY(-2px);border-color:var(--teal);box-shadow:var(--sh-2);}
.topic-card .thumb{position:relative;aspect-ratio:3/2;overflow:hidden;background:var(--sand-2);}
.topic-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--t) var(--ease);}
.topic-card:hover .thumb img{transform:scale(1.03);}
.topic-card .body{padding:24px;display:flex;flex-direction:column;gap:8px;}
.topic-card h3{margin-top:4px;}
.topic-card .body p{font-size:15px;line-height:1.72;margin:0;}
.topic-card .card-foot{margin-top:16px;display:flex;align-items:center;justify-content:space-between;gap:12px;}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);font-size:12px;font-weight:500;letter-spacing:.04em;background:rgba(47,182,168,.1);color:var(--teal-deep);}
.badge.gold{background:rgba(232,180,85,.16);color:#8a6318;}
.topic-card.wide{grid-column:span 1;}
.topic-card ul{display:flex;flex-direction:column;gap:6px;margin-top:4px;}
.topic-card ul li{position:relative;padding-left:16px;font-size:15px;line-height:1.72;color:var(--text-2);}
.topic-card ul li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--teal);}
.topic-card .meta-note{margin-top:12px;padding:14px 16px;border-radius:var(--r-md);background:var(--sand-2);font-size:14px;line-height:1.7;color:var(--text-2);}

/* ---------- 对比区 ---------- */
.compare-wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:start;}
.compare-card{background:var(--card);border:var(--line);border-radius:var(--r-lg);padding:32px;box-shadow:var(--sh-1);}
.compare-card.alt{background:var(--sand-2);border-color:transparent;}
.compare-card h3{margin-bottom:6px;}
.compare-card .tone{font-size:13px;color:var(--text-3);letter-spacing:.04em;}
.compare-list{margin-top:20px;display:flex;flex-direction:column;gap:14px;}
.compare-list li{display:flex;gap:12px;font-size:15px;line-height:1.72;color:var(--text-2);}
.compare-list li strong{flex:0 0 76px;font-weight:500;color:var(--ink);font-size:14px;}
.checklist{margin-top:24px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 24px;}
.checklist li{display:flex;gap:12px;align-items:flex-start;font-size:15px;line-height:1.72;color:var(--text-2);}
.checklist .num{flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:rgba(47,182,168,.12);color:var(--teal-deep);font-family:var(--font-mono);font-size:13px;display:inline-flex;align-items:center;justify-content:center;}

/* ---------- 浅色 CTA ---------- */
.cta-lite{display:flex;align-items:center;justify-content:space-between;gap:32px;background:var(--card);border:var(--line);border-radius:var(--r-lg);padding:32px 40px;box-shadow:var(--sh-1);flex-wrap:wrap;}
.cta-lite h2{font-size:clamp(22px,2vw,28px);}
.cta-lite p{margin-top:8px;font-size:15px;}

/* ---------- 继续浏览 ---------- */
.next-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.next-card{display:flex;flex-direction:column;gap:8px;background:var(--card);border:var(--line);border-radius:var(--r-md);padding:24px;box-shadow:var(--sh-1);transition:border-color var(--t) var(--ease),transform var(--t) var(--ease),box-shadow var(--t) var(--ease);}
.next-card:hover{border-color:var(--teal);transform:translateY(-2px);box-shadow:var(--sh-2);}
.next-card h3{font-size:18px;}
.next-card p{font-size:14px;line-height:1.7;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(246,243,238,.78);padding:72px 0 28px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.site-footer .brand-mark{background:rgba(246,243,238,.1);}
.site-footer .brand-mark i:nth-child(1){background:var(--white);}
.site-footer .brand-mark i:nth-child(4){background:var(--white);}
.site-footer .brand-text b{color:var(--white);}
.site-footer .brand-text span{color:rgba(246,243,238,.6);}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.75;color:rgba(246,243,238,.66);max-width:300px;}
.footer-col h4{color:var(--white);font-size:15px;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li a,.footer-col p{position:relative;font-size:14px;color:rgba(246,243,238,.72);margin:0;}
.footer-col li a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:1px;background:var(--teal);transition:width var(--t-fast) var(--ease);}
.footer-col li a:hover{color:var(--teal);}
.footer-col li a:hover::after{width:100%;}
.footer-col p{margin-bottom:10px;}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:48px;padding-top:20px;border-top:1px solid rgba(246,243,238,.12);font-size:13px;color:rgba(246,243,238,.55);flex-wrap:wrap;}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(8px);transition:opacity var(--t-slow) var(--ease),transform var(--t-slow) var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .container{max-width:1120px;}
}
@media (max-width:1024px){
  .section{padding:72px 0;}
  .section-tight{padding:56px 0;}
  .search-box{max-width:420px;}
  .grid-topic{grid-template-columns:repeat(2,minmax(0,1fr));}
  .compare-wrap{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;row-gap:32px;}
  .next-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
}
@media (max-width:900px){
  .header-actions .header-link{display:none;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  h1{font-size:34px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .header-top{gap:12px;padding-top:12px;padding-bottom:12px;}
  .search-box{display:none;}
  .search-toggle{display:inline-flex;margin-left:auto;}
  .header-actions{display:none;}
  .brand-mark{width:28px;height:28px;border-radius:8px;}
  .brand-text b{font-size:17px;}
  .brand-text span{font-size:11px;letter-spacing:.12em;}
  .header-cats{padding-bottom:10px;}
  .grid-topic{grid-template-columns:1fr;}
  .topic-card .body{padding:16px;}
  .compare-card{padding:24px 20px;}
  .checklist{grid-template-columns:1fr;}
  .cta-lite{padding:24px 20px;gap:20px;}
  .cta-lite .btn{width:100%;}
  .next-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .page-head .container{padding-top:36px;padding-bottom:36px;min-height:0;}
  .page-head .lead{font-size:17px;}
}
@media (max-width:520px){
  .filter-inner{gap:10px;}
  .chip{height:32px;padding:0 14px;}
  .chip-filter{height:34px;padding:0 14px;}
  .btn{height:46px;padding:0 22px;width:100%;}
  .btn-sm{width:auto;height:42px;}
}
@media (max-width:480px){
  .brand-text span{display:none;}
  .topic-card .card-foot{flex-wrap:wrap;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:0ms !important;transition-duration:0ms !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category4 */
:root{
  --ink:#1B1533;
  --ink-deep:#12102A;
  --jade:#2FB6A8;
  --jade-deep:#1F8C81;
  --gold:#E8B455;
  --sand:#F6F3EE;
  --soft:#EFEAE2;
  --white:#FFFFFF;
  --t1:#1C1A2E;
  --t2:#5B5876;
  --t3:#8B88A3;
  --line:rgba(27,21,51,.08);
  --line-strong:rgba(27,21,51,.18);
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(27,21,51,.04);
  --sh-2:0 18px 40px -20px rgba(27,21,51,.18);
  --sec:96px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-num:"Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--sand);
  color:var(--t1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  text-align:left;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;word-break:break-word;}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;border:none;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);font-weight:700;color:var(--ink);letter-spacing:-0.01em;}
p{margin:0;}
:focus-visible{outline:2px solid var(--jade);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:var(--sec) 0;}
.section-soft{background:var(--soft);}
.section-white{background:var(--white);}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:48px;flex-wrap:wrap;}
.sec-head h2{font-size:clamp(26px,2.6vw,38px);line-height:1.2;}
.sec-head .sec-desc{color:var(--t2);font-size:15px;max-width:560px;margin-top:8px;}
h3{font-size:20px;line-height:1.35;}

/* ---------- 品牌 ---------- */
.brand{display:inline-flex;align-items:center;gap:10px;height:34px;flex:none;}
.brand-mark{position:relative;width:30px;height:30px;flex:none;display:block;}
.brand-mark i{position:absolute;border-radius:50%;display:block;}
.brand-mark i:nth-child(1){width:7px;height:7px;background:var(--ink);left:1px;top:12px;}
.brand-mark i:nth-child(2){width:5px;height:5px;background:var(--jade);left:12px;top:3px;}
.brand-mark i:nth-child(3){width:9px;height:9px;background:var(--ink);left:17px;top:14px;}
.brand-mark i:nth-child(4){width:4px;height:4px;background:var(--jade);left:9px;top:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-family:var(--font-serif);font-size:17px;font-weight:700;color:var(--ink);letter-spacing:.02em;}
.brand-text span{font-size:11px;color:var(--t3);letter-spacing:.16em;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,243,238,.92);
  border-bottom:1px solid transparent;
  transition:box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.site-header.is-stuck{
  box-shadow:var(--sh-1);
  border-bottom-color:var(--line);
}
.header-top{
  display:flex;align-items:center;gap:24px;
  min-height:88px;
  transition:min-height .22s var(--ease);
}
.site-header.is-stuck .header-top{min-height:64px;}
.searchbar{
  flex:1 1 auto;max-width:560px;margin:0 auto;
  display:flex;align-items:center;
  height:46px;
  background:var(--white);
  border:1px solid var(--line-strong);
  border-radius:var(--r-pill);
  padding:0 4px 0 16px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.searchbar:focus-within{border-color:var(--jade);box-shadow:0 0 0 3px rgba(47,182,168,.18);}
.searchbar svg{flex:none;width:18px;height:18px;color:var(--ink);opacity:.6;}
.searchbar input{
  flex:1 1 auto;min-width:0;height:100%;
  border:none;background:transparent;outline:none;
  font-size:14px;padding:0 12px;color:var(--t1);
}
.searchbar input::placeholder{color:var(--t3);}
.search-btn{
  flex:none;width:88px;height:38px;
  background:var(--ink);color:var(--sand);
  border-radius:var(--r-pill);
  font-size:14px;font-weight:500;
  transition:filter .2s var(--ease),transform .2s var(--ease);
}
.search-btn:hover{filter:brightness(1.12);}
.search-btn:active{transform:translateY(1px);}
.header-actions{display:flex;align-items:center;gap:16px;flex:none;margin-left:auto;}
.header-link{font-size:14px;color:var(--t2);display:inline-flex;align-items:center;gap:4px;}
.header-link::after{content:"→";transition:transform .2s var(--ease);}
.header-link:hover{color:var(--jade-deep);}
.header-link:hover::after{transform:translateX(4px);}
.mobile-search-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border-radius:var(--r-pill);color:var(--ink);}
.mobile-search-toggle svg{width:20px;height:20px;}
.mobile-search{display:none;border-top:1px solid var(--line);padding:12px 0;background:var(--white);}
.mobile-search.is-open{display:block;}
.mobile-search .inner{display:flex;align-items:center;gap:12px;}
.mobile-search .searchbar{max-width:none;margin:0;}
.mobile-search .cancel{font-size:14px;color:var(--t2);white-space:nowrap;}

.header-nav{overflow:hidden;max-height:52px;transition:max-height .24s var(--ease);}
.site-header.is-stuck .header-nav{max-height:0;}
.nav-scroll{overflow-x:auto;scrollbar-width:none;padding-bottom:14px;}
.nav-scroll::-webkit-scrollbar{display:none;}
.nav-cats{display:flex;gap:8px;align-items:center;white-space:nowrap;}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:var(--r-pill);
  font-size:13px;color:var(--t2);
  border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.chip:hover{background:rgba(27,21,51,.05);color:var(--ink);}
.chip.is-active{background:var(--ink);color:var(--sand);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:500;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary{background:var(--ink);color:var(--sand);}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(0);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.btn-ghost{
  height:42px;border-radius:var(--r-pill);
  background:transparent;border:1px solid var(--line-strong);color:var(--t1);
}
.btn-ghost:hover{background:rgba(27,21,51,.06);}
.btn-ghost-inverse{background:transparent;border:1px solid rgba(246,243,238,.4);color:var(--sand);}
.btn-ghost-inverse:hover{background:rgba(246,243,238,.12);}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:500;color:var(--t1);
  transition:color .2s var(--ease);
}
.link-arrow::after{content:"→";transition:transform .22s var(--ease);}
.link-arrow:hover{color:var(--jade-deep);}
.link-arrow:hover::after{transform:translateX(4px);}
.btn:disabled,.link-arrow[aria-disabled="true"]{opacity:.5;cursor:not-allowed;transform:none;}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;
  border-radius:var(--r-pill);
  background:rgba(47,182,168,.12);
  color:var(--jade-deep);
  font-size:12px;font-weight:500;letter-spacing:.04em;
}
.badge-gold{background:rgba(232,180,85,.18);color:#8A6414;}

/* ---------- 页头条 ---------- */
.page-head{
  background:var(--sand);
  border-bottom:1px solid var(--line);
  padding-top:24px;
}
.page-head-grid{
  display:grid;grid-template-columns:1fr 420px;gap:48px;align-items:center;
  min-height:240px;padding-bottom:48px;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t2);}
.breadcrumb a:hover{color:var(--jade-deep);}
.breadcrumb .sep{color:var(--t3);}
.breadcrumb .current{color:var(--t1);}
.page-head h1{
  font-size:clamp(34px,4.6vw,60px);
  line-height:1.12;letter-spacing:-.02em;
  margin:16px 0 16px;
  max-width:14em;
}
.page-head .lead{font-size:19px;line-height:1.75;color:var(--t2);max-width:34em;}
.page-head-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  aspect-ratio:16/10;background:var(--soft);box-shadow:var(--sh-1);
}
.page-head-media img{width:100%;height:100%;object-fit:cover;}
.page-head-meta{display:flex;gap:24px;margin-top:24px;flex-wrap:wrap;}
.page-head-meta span{font-size:13px;color:var(--t2);display:inline-flex;align-items:center;gap:8px;}
.page-head-meta span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--jade);}

/* ---------- 瀑布流 ---------- */
.waterfall{columns:3;column-gap:24px;}
.wf-card{
  break-inside:avoid;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  overflow:hidden;
  margin:0 0 24px;
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.wf-card:hover{border-color:var(--jade);transform:translateY(-2px);box-shadow:var(--sh-2);}
.wf-media{position:relative;background:var(--soft);aspect-ratio:3/2;overflow:hidden;}
.wf-media img{width:100%;height:100%;object-fit:cover;transition:transform .28s var(--ease);}
.wf-card:hover .wf-media img{transform:scale(1.03);}
.wf-body{padding:24px;}
.wf-body h3{margin:12px 0 8px;font-size:20px;}
.wf-body p{font-size:15px;line-height:1.72;color:var(--t2);}
.wf-body .wf-link{margin-top:16px;}
.wf-notes{margin:16px 0 0;padding:16px 0 0;border-top:1px solid var(--line);display:grid;gap:8px;}
.wf-notes li{font-size:14px;line-height:1.7;color:var(--t2);padding-left:16px;position:relative;}
.wf-notes li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--jade);}

/* ---------- 引用带 ---------- */
.quote-band{
  margin-top:64px;
  background:var(--ink-deep);
  border-radius:var(--r-lg);
  padding:40px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.quote-band::before{
  content:"";position:absolute;left:-40px;top:-40px;width:260px;height:200px;
  background-image:radial-gradient(circle,rgba(246,243,238,.22) 1px,transparent 1.4px);
  background-size:26px 26px;opacity:.9;pointer-events:none;
}
.quote-band p{
  position:relative;color:var(--sand);font-family:var(--font-serif);
  font-size:clamp(20px,2vw,26px);line-height:1.5;max-width:26em;
}
.quote-band .badge{position:relative;margin-bottom:12px;background:rgba(47,182,168,.2);color:#8FE3D8;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:22px 0;text-align:left;font-size:16px;font-weight:600;color:var(--ink);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.faq-q:hover{color:var(--jade-deep);}
.faq-icon{
  position:relative;flex:none;width:18px;height:18px;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--jade-deep);border-radius:2px;
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.faq-icon::before{left:0;top:8px;width:18px;height:2px;}
.faq-icon::after{top:0;left:8px;width:2px;height:18px;}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease);}
.faq-a-inner{padding:0 0 24px;font-size:15px;line-height:1.75;color:var(--t2);max-width:64em;}
.faq-a-inner strong{color:var(--ink);font-weight:600;}

/* ---------- 深色 CTA ---------- */
.cta-narrow{
  background:var(--ink-deep);
  border-radius:var(--r-lg);
  padding:48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-narrow::after{
  content:"";position:absolute;right:-60px;bottom:-60px;width:280px;height:220px;
  background-image:radial-gradient(circle,rgba(246,243,238,.2) 1px,transparent 1.4px);
  background-size:24px 24px;pointer-events:none;
}
.cta-narrow h2{color:var(--sand);font-size:clamp(24px,2.4vw,34px);line-height:1.25;position:relative;}
.cta-narrow p{color:rgba(246,243,238,.72);font-size:15px;margin-top:8px;position:relative;}
.cta-narrow .btn{position:relative;background:var(--jade);color:#062B27;}
.cta-narrow .btn:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:var(--sh-2);}

/* ---------- 继续浏览 ---------- */
.next-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.next-card{
  display:block;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r-md);padding:24px;box-shadow:var(--sh-1);
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.next-card:hover{border-color:var(--jade);transform:translateY(-2px);box-shadow:var(--sh-2);}
.next-card h3{font-size:18px;margin:12px 0 8px;}
.next-card p{font-size:14px;line-height:1.72;color:var(--t2);}
.next-card .link-arrow{margin-top:16px;font-size:14px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(246,243,238,.78);margin-top:96px;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:48px;}
.footer-col h4{color:var(--sand);font-family:var(--font-sans);font-size:14px;font-weight:600;letter-spacing:.06em;margin-bottom:20px;}
.footer-col .brand{margin-bottom:16px;height:auto;}
.footer-col .brand-text b{color:var(--sand);}
.footer-col .brand-text span{color:rgba(246,243,238,.55);}
.footer-col .brand-mark i:nth-child(1),.footer-col .brand-mark i:nth-child(3){background:var(--sand);}
.footer-desc{font-size:14px;line-height:1.75;color:rgba(246,243,238,.6);max-width:24em;}
.footer-col ul{display:grid;gap:12px;}
.footer-col li a{font-size:14px;color:rgba(246,243,238,.72);position:relative;display:inline-block;}
.footer-col li a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:100%;height:1px;background:var(--jade);
  transform:scaleX(0);transform-origin:left;transition:transform .16s var(--ease);
}
.footer-col li a:hover{color:var(--jade);}
.footer-col li a:hover::after{transform:scaleX(1);}
.footer-col p{font-size:14px;line-height:1.9;color:rgba(246,243,238,.6);}
.footer-bottom{
  border-top:1px solid rgba(246,243,238,.12);
  padding:24px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(246,243,238,.5);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .42s var(--ease),transform .42s var(--ease);}
.reveal.is-in{opacity:1;transform:translateY(0);}

/* ---------- 断点 ---------- */
@media (max-width:1280px){
  .container{max-width:1200px;}
}
@media (max-width:1024px){
  :root{--sec:72px;}
  .page-head-grid{grid-template-columns:1fr;gap:32px;}
  .page-head-media{max-height:320px;aspect-ratio:16/9;}
  .waterfall{columns:2;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px;}
}
@media (max-width:900px){
  .searchbar{display:none;}
  .mobile-search-toggle{display:inline-flex;}
  .header-actions .header-link{display:none;}
  .nav-scroll{
    -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 16px,#000 calc(100% - 16px),transparent 100%);
    mask-image:linear-gradient(90deg,transparent 0,#000 16px,#000 calc(100% - 16px),transparent 100%);
  }
}
@media (max-width:768px){
  :root{--sec:56px;}
  .container{padding:0 20px;}
  .header-top{min-height:64px;gap:12px;}
  .brand{height:28px;}
  .brand-text b{font-size:15px;}
  .page-head h1{font-size:34px;}
  .page-head .lead{font-size:16px;}
  .waterfall{columns:1;}
  .wf-body{padding:16px;}
  .quote-band{padding:32px 24px;}
  .cta-narrow{padding:32px 24px;}
  .next-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .site-footer{margin-top:56px;padding-top:48px;}
  .sec-head{margin-bottom:32px;}
}
@media (max-width:520px){
  .header-actions .btn{height:36px;padding:0 14px;font-size:13px;}
  .page-head-meta{gap:16px;}
  .quote-band .btn,.cta-narrow .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:0ms !important;animation-duration:0ms !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}