/* roulang page: index */
:root{
  --c-primary:#4B2ED1;
  --c-primary-deep:#2E1C8F;
  --c-accent:#FF7A45;
  --c-accent2:#12B8A6;
  --c-ink:#14121F;
  --c-bg:#F7F6FB;
  --c-surface:#FFFFFF;
  --c-border:#E7E4F2;
  --c-text-2:#5C5870;
  --c-text-3:#8B87A0;
  --r-card:14px;
  --r-img:18px;
  --r-input:10px;
  --shadow-1:0 2px 8px rgba(20,18,31,.06);
  --shadow-2:0 10px 24px rgba(20,18,31,.10);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.9;
  color:var(--c-ink);
  letter-spacing:.01em;
  background-color:var(--c-bg);
  background-image:
    radial-gradient(circle at 10% 6%,rgba(75,46,209,.055),transparent 44%),
    radial-gradient(circle at 92% 2%,rgba(18,184,166,.055),transparent 40%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--c-primary);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;letter-spacing:.01em}
p{margin:0 0 1.15em}
ul,ol{margin:0;padding:0}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#fff;
  border-bottom:1px solid var(--c-border);
  box-shadow:0 1px 0 rgba(20,18,31,.04);
}
.header-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:none;color:var(--c-ink)}
.brand:hover{text-decoration:none}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:none;
  border:2px solid var(--c-ink);
  background:linear-gradient(135deg,#ffffff 0%,#EFEBFF 100%);
  display:grid;place-items:center;
}
.brand-mark svg{width:18px;height:18px}
.brand-text{font-size:17px;font-weight:700;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:6px}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 10px;font-size:14px;color:var(--c-text-2);
  border-radius:8px;white-space:nowrap;
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--c-primary);background:#F4F1FE;text-decoration:none}
.nav-link.is-active{color:var(--c-primary);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:10px;right:10px;bottom:1px;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{display:block}
.search-box input{
  width:176px;height:40px;border-radius:var(--r-input);
  border:1px solid var(--c-border);background:#FAFAFE;
  padding:0 14px;font-size:14px;color:var(--c-ink);font-family:inherit;
  transition:border-color .18s ease,box-shadow .18s ease,width .22s ease,background .18s ease;
}
.search-box input::placeholder{color:#9A96AD}
.search-box input:focus{
  outline:none;border-color:var(--c-primary);background:#fff;
  box-shadow:0 0 0 3px rgba(75,46,209,.12);width:206px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:inherit;font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .16s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.4;cursor:not-allowed;pointer-events:none}
.btn-primary{
  padding:12px 22px;border-radius:999px;color:#fff;
  background:linear-gradient(135deg,#5B3BE0 0%,#2E1C8F 100%);
  box-shadow:0 4px 14px rgba(75,46,209,.28);
}
.btn-primary:hover{background:linear-gradient(135deg,#4F32CE 0%,#241468 100%);box-shadow:var(--shadow-2);text-decoration:none}
.btn-accent{
  padding:14px 30px;border-radius:999px;color:#fff;
  background:linear-gradient(135deg,#FF8A57 0%,#F2632A 100%);
  box-shadow:0 6px 18px rgba(255,122,69,.34);
}
.btn-accent:hover{background:linear-gradient(135deg,#F87A44 0%,#DC561F 100%);box-shadow:0 12px 26px rgba(255,122,69,.36);text-decoration:none;color:#fff}
.btn-ghost{
  padding:12px 22px;border-radius:12px;color:var(--c-ink);
  background:#fff;border:1px solid var(--c-border);box-shadow:var(--shadow-1);
}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary);box-shadow:var(--shadow-2);text-decoration:none}
.btn-sm{padding:10px 18px;font-size:14px}
.nav-toggle{
  display:none;width:40px;height:40px;flex:none;
  border-radius:10px;border:1px solid var(--c-border);background:#fff;
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ============ 首屏 ============ */
.hero{
  position:relative;overflow:hidden;
  background:#fff;
  border-bottom:1px solid var(--c-border);
  padding:66px 0 74px;
}
.hero::before{
  content:"";position:absolute;top:-180px;right:-140px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(75,46,209,.17),transparent 68%);pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(75,46,209,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(75,46,209,.055) 1px,transparent 1px);
  background-size:40px 40px;
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.75),transparent 72%);
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.75),transparent 72%);
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:7fr 5fr;gap:52px;align-items:center}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  border:1px solid rgba(75,46,209,.24);background:#F3F0FE;
  color:var(--c-primary);font-size:13px;font-weight:600;letter-spacing:.02em;
}
.hero-eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--c-accent);display:inline-block}
.hero h1{
  font-size:clamp(30px,4.4vw,46px);line-height:1.25;font-weight:700;
  margin:18px 0 16px;
}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(transparent 64%,rgba(255,122,69,.36) 64%);
}
.hero-lead{
  font-size:18px;line-height:1.8;color:var(--c-ink);font-weight:600;
  margin:0 0 14px;max-width:32em;
}
.hero-text{font-size:16px;line-height:1.9;color:var(--c-text-2);margin:0 0 28px;max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-meta{
  margin-top:24px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;color:var(--c-text-2);
}
.hero-meta .dot{color:var(--c-accent2);font-weight:700}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;border-radius:var(--r-img);
  border:1px solid var(--c-border);
  box-shadow:0 20px 44px rgba(20,18,31,.15);
}
.hero-badge{
  position:absolute;left:-16px;bottom:-20px;
  display:flex;align-items:center;gap:12px;
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:12px 18px;box-shadow:var(--shadow-2);
}
.hero-badge .num{font-size:28px;font-weight:700;line-height:1;color:var(--c-primary);font-variant-numeric:tabular-nums}
.hero-badge .txt{font-size:12px;line-height:1.55;color:var(--c-text-2)}

/* ============ 快捷信息条 ============ */
.trust-bar{padding:30px 0;background:var(--c-bg);border-bottom:1px solid var(--c-border)}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.trust-item{display:flex;gap:12px;align-items:flex-start}
.trust-item .ic{
  width:34px;height:34px;flex:none;border-radius:10px;
  background:#fff;border:1px solid var(--c-border);
  display:grid;place-items:center;color:var(--c-primary);
}
.trust-item .ic svg{width:17px;height:17px}
.trust-item h3{font-size:15px;font-weight:600;line-height:1.5;margin-bottom:2px}
.trust-item p{font-size:13px;line-height:1.65;color:var(--c-text-2);margin:0}

/* ============ 通用板块 ============ */
.section{padding:78px 0}
.section-alt{background:#FBFAFF;border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:clamp(23px,3vw,32px);line-height:1.35;font-weight:700}
.section-head .sub{margin:10px 0 0;font-size:15px;color:var(--c-text-2);max-width:56ch;line-height:1.8}
.section-more{font-size:14px;font-weight:600;color:var(--c-primary);white-space:nowrap}

/* ============ 三步上手 ============ */
.steps{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.steps::before{
  content:"";position:absolute;top:62px;left:9%;right:9%;
  border-top:2px dashed rgba(75,46,209,.26);z-index:0;
}
.step-card{
  position:relative;z-index:1;
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:30px 26px 28px;box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.step-num{
  font-size:64px;font-weight:700;line-height:1;margin-bottom:14px;
  color:transparent;-webkit-text-stroke:2px rgba(75,46,209,.34);
  letter-spacing:.02em;font-variant-numeric:tabular-nums;
}
.step-card h3{font-size:20px;font-weight:600;line-height:1.45;margin-bottom:10px}
.step-card p{font-size:15px;line-height:1.85;color:var(--c-text-2);margin:0}
.step-foot{
  margin-top:20px;padding-top:16px;border-top:1px dashed var(--c-border);
  font-size:13px;color:var(--c-text-3);
}

/* ============ 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-1);color:inherit;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);text-decoration:none;border-color:#D9D2F5}
.news-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,#EEE9FF,#DCD4FF)}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.news-card:hover .news-thumb img{transform:scale(1.045)}
.news-badge{
  position:absolute;left:12px;top:12px;
  padding:4px 11px;border-radius:999px;
  background:rgba(20,18,31,.76);color:#fff;font-size:12px;font-weight:500;
  backdrop-filter:blur(4px);
}
.news-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.news-body h3{
  font-size:17px;font-weight:600;line-height:1.5;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-excerpt{
  font-size:14px;line-height:1.8;color:var(--c-text-2);margin:0 0 16px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--c-text-3);
  border-top:1px dashed var(--c-border);padding-top:12px;
}
.news-foot .more{color:var(--c-primary);font-weight:600}
.empty-state{
  border:1px dashed var(--c-border);background:#fff;border-radius:var(--r-card);
  padding:52px 24px;text-align:center;color:var(--c-text-2);font-size:15px;
}
.empty-state a{font-weight:600}

/* ============ 案例证明 ============ */
.proof-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:stretch}
.proof-main{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-1);
}
.proof-main img{width:100%;aspect-ratio:16/10;object-fit:cover}
.proof-main .cap{padding:24px 26px 26px}
.proof-cat{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;color:var(--c-accent2);
  background:rgba(18,184,166,.1);border:1px solid rgba(18,184,166,.26);
  border-radius:999px;padding:4px 12px;margin-bottom:14px;
}
.proof-main h3{font-size:21px;font-weight:600;line-height:1.5;margin-bottom:12px}
.proof-main p{font-size:15px;line-height:1.85;color:var(--c-text-2);margin:0}
.proof-right{display:grid;grid-template-rows:1fr 1fr;gap:24px}
.proof-mini{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-1);display:flex;flex-direction:column;justify-content:center;
  transition:transform .2s ease,box-shadow .2s ease;
}
.proof-mini:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.proof-mini .fig{
  font-size:36px;font-weight:700;line-height:1;color:var(--c-accent2);
  font-variant-numeric:tabular-nums;margin-bottom:10px;
}
.proof-mini h3{font-size:16px;font-weight:600;margin-bottom:8px}
.proof-mini p{font-size:14px;line-height:1.8;color:var(--c-text-2);margin:0}

/* ============ 常见异议 ============ */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:52px;align-items:start}
.faq-intro h2{font-size:clamp(23px,3vw,32px);line-height:1.35;font-weight:700;margin-bottom:16px}
.faq-intro p{font-size:15px;line-height:1.9;color:var(--c-text-2)}
.faq-intro .faq-tip{
  margin-top:22px;padding:16px 18px;border-radius:12px;
  background:#F3F0FE;border:1px solid rgba(75,46,209,.18);
  font-size:13px;line-height:1.75;color:var(--c-primary-deep);
}
.faq-item{
  background:#fff;border:1px solid var(--c-border);border-left:3px solid transparent;
  border-radius:var(--r-card);margin-bottom:12px;overflow:hidden;
  transition:background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{box-shadow:var(--shadow-1)}
.faq-item.open{background:#FAF9FE;border-left-color:var(--c-primary)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--c-ink);line-height:1.6;
}
.faq-q .chev{
  flex:none;width:20px;height:20px;position:relative;transition:transform .25s ease;
}
.faq-q .chev::before,.faq-q .chev::after{
  content:"";position:absolute;top:9px;left:3px;width:14px;height:2px;border-radius:2px;background:var(--c-primary);
}
.faq-q .chev::after{transform:rotate(90deg);transition:opacity .2s ease}
.faq-item.open .chev{transform:rotate(180deg)}
.faq-item.open .chev::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{
  margin:0;padding:0 22px 20px;font-size:15px;line-height:1.9;color:var(--c-text-2);
}

/* ============ 终屏 CTA ============ */
.final-wrap{padding:0 0 88px}
.cta-panel{
  position:relative;overflow:hidden;
  background:var(--c-ink);border-radius:22px;
  padding:56px 56px;color:#fff;
  display:grid;grid-template-columns:1.25fr .75fr;gap:44px;align-items:center;
}
.cta-panel::after{
  content:"";position:absolute;right:-120px;top:-140px;width:440px;height:440px;border-radius:50%;
  background:radial-gradient(circle,rgba(75,46,209,.6),transparent 66%);pointer-events:none;
}
.cta-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:#C9BDFF;
  border:1px solid rgba(201,189,255,.32);border-radius:999px;padding:5px 13px;margin-bottom:18px;
}
.cta-panel h2{position:relative;z-index:1;font-size:clamp(24px,3vw,34px);line-height:1.35;margin-bottom:16px}
.cta-panel .cta-text{position:relative;z-index:1;font-size:15px;line-height:1.9;color:rgba(255,255,255,.74);margin:0}
.cta-side{position:relative;z-index:1;display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.cta-side .btn-accent{width:100%;justify-content:center}
.cta-note{font-size:12px;line-height:1.7;color:rgba(255,255,255,.52);margin:0}

/* ============ 页脚 ============ */
.site-footer{background:#fff;border-top:1px solid var(--c-border);padding:64px 0 0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.foot-brand .brand-mark{border-color:var(--c-primary);background:linear-gradient(135deg,#fff,#EFEBFF)}
.foot-brand strong{font-size:16px;font-weight:700;color:var(--c-ink)}
.foot-about{font-size:14px;line-height:1.85;color:var(--c-text-2);margin:0;max-width:34ch}
.site-footer h4{font-size:15px;font-weight:600;color:var(--c-ink);margin-bottom:16px}
.foot-links{list-style:none;display:flex;flex-direction:column;gap:2px}
.foot-links a{font-size:14px;line-height:2;color:var(--c-text-2)}
.foot-links a:hover{color:var(--c-primary);text-decoration:none}
.foot-note{font-size:13px;line-height:1.9;color:var(--c-text-3);margin:0 0 10px}
.foot-bottom{
  margin-top:52px;border-top:1px solid var(--c-border);
  padding:22px 0;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--c-text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .nav-link{font-size:13px;padding:8px 8px}
  .search-box input{width:150px}
}
@media (max-width:1079px){
  .header-inner{height:56px}
  .nav-toggle{display:inline-flex;order:3}
  .search-box{display:none}
  .main-nav{
    position:fixed;top:56px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:2px;
    background:#fff;border-bottom:1px solid var(--c-border);
    padding:12px 16px 18px;margin-left:0;
    box-shadow:0 18px 34px rgba(20,18,31,.12);
    max-height:calc(100vh - 56px);overflow:auto;
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:transform .22s ease,opacity .22s ease;
  }
  .main-nav.is-open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-link{font-size:15px;padding:11px 12px}
  .nav-link.is-active::after{left:12px;right:auto;width:22px;bottom:6px}
  .hero{padding:46px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .hero-badge{left:auto;right:14px;bottom:-16px}
  .steps{grid-template-columns:1fr;gap:18px}
  .steps::before{display:none}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .proof-grid{grid-template-columns:1fr}
  .proof-right{grid-template-rows:auto auto}
  .faq-layout{grid-template-columns:1fr;gap:30px}
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .cta-panel{grid-template-columns:1fr;padding:40px 32px;gap:28px}
  .cta-side{align-items:stretch}
  .section{padding:60px 0}
  .final-wrap{padding:0 0 64px}
}
@media (max-width:767px){
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
  .section-head{margin-bottom:30px}
}
@media (max-width:639px){
  .news-grid{grid-template-columns:1fr}
  .trust-grid{grid-template-columns:1fr}
}
@media (max-width:480px){
  body{font-size:16px}
  .container{padding:0 16px}
  .hero{padding:34px 0 44px}
  .hero h1{font-size:26px}
  .hero-lead{font-size:16.5px}
  .section{padding:48px 0}
  .step-card{padding:24px 20px}
  .step-num{font-size:52px}
  .cta-panel{padding:32px 22px;border-radius:18px}
  .foot-grid{grid-template-columns:1fr}
  .proof-mini .fig{font-size:30px}
  .brand-text{font-size:15px}
}

/* roulang page: article */
:root{
  --c-primary:#4B2ED1;
  --c-primary-deep:#2E1C8F;
  --c-primary-soft:#EFEBFF;
  --c-accent:#FF7A45;
  --c-accent2:#12B8A6;
  --c-ink:#14121F;
  --c-bg:#F7F6FB;
  --c-surface:#FFFFFF;
  --c-border:#E7E4F2;
  --c-text:#14121F;
  --c-text-2:#5C5870;
  --r-card:14px;
  --r-img:16px;
  --r-input:10px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(20,18,31,.06);
  --sh-2:0 10px 24px rgba(20,18,31,.10);
  --sp-section:76px;
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.9;
  color:var(--c-text);
  background:var(--c-bg);
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--c-primary-deep);}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.01em;color:var(--c-ink);}
p{margin:0 0 1.15em;}
ul,ol{margin:0 0 1.15em;padding-left:1.4em;}
button{font-family:inherit;}
input{font-family:inherit;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border:1px solid transparent;
  border-radius:var(--r-pill);font-size:15px;font-weight:600;line-height:1;
  cursor:pointer;text-decoration:none;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-primary{
  color:#fff;background:linear-gradient(135deg,#5A3BE0 0%,#3A22A8 100%);
  box-shadow:0 6px 16px rgba(75,46,209,.24);
}
.btn-primary:hover{color:#fff;box-shadow:0 10px 22px rgba(75,46,209,.30);}
.btn-ghost{
  color:var(--c-primary);background:var(--c-surface);border-color:var(--c-border);border-radius:12px;
}
.btn-ghost:hover{color:var(--c-primary-deep);border-color:#CFC7F3;background:#FBFAFF;}
.btn-accent{
  color:#fff;background:var(--c-accent);border-radius:var(--r-pill);
  box-shadow:0 6px 16px rgba(255,122,69,.26);
}
.btn-accent:hover{color:#fff;background:#F0662F;}
.btn:active{transform:translateY(1px);}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--c-surface);
  border-bottom:1px solid var(--c-border);box-shadow:0 1px 0 rgba(20,18,31,.03);
}
.header-inner{display:flex;align-items:center;gap:28px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--c-ink);}
.brand:hover{color:var(--c-ink);}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--c-border);border-radius:10px;background:var(--c-primary-soft);
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.02em;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:26px;flex:1 1 auto;min-width:0;}
.nav-link{
  position:relative;padding:6px 0;font-size:15px;color:var(--c-text-2);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.search-box{display:flex;}
.search-box input{
  width:190px;height:40px;padding:0 14px;border:1px solid var(--c-border);border-radius:var(--r-pill);
  background:#FBFAFF;font-size:14px;color:var(--c-text);transition:border-color .18s ease,background .18s ease;
}
.search-box input::placeholder{color:#9A95AE;}
.search-box input:focus{outline:none;border-color:var(--c-primary);background:#fff;box-shadow:0 0 0 3px rgba(75,46,209,.10);}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--c-border);border-radius:10px;
  background:#fff;cursor:pointer;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:50%;width:16px;height:2px;border-radius:2px;background:var(--c-ink);
  transform:translateX(-50%);transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:translateX(-50%) rotate(45deg);top:0;}
.nav-toggle[aria-expanded="true"] span::after{transform:translateX(-50%) rotate(-45deg);top:0;}

/* ---------- 面包屑与页头 ---------- */
.crumbs-bar{background:var(--c-surface);border-bottom:1px solid var(--c-border);}
.crumbs{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  padding:14px 0;font-size:13.5px;color:var(--c-text-2);
}
.crumbs a{color:var(--c-text-2);}
.crumbs a:hover{color:var(--c-primary);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px;}
.crumb-sep{color:#C3BEDA;}
.crumb-current{color:var(--c-ink);font-weight:600;max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

.page-head{
  position:relative;overflow:hidden;
  background-color:#F1EEFB;
  background-image:linear-gradient(180deg,rgba(247,246,251,.72),rgba(247,246,251,.94)),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--c-border);
}
.page-head::after{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(75,46,209,.16),rgba(75,46,209,0) 68%);
}
.page-head-inner{position:relative;z-index:1;padding:44px 0 40px;max-width:820px;}
.badge-cat{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;border-radius:var(--r-pill);
  background:rgba(18,184,166,.12);color:#0E8C7E;font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.article-title{
  margin:16px 0 0;font-size:clamp(28px,3.6vw,42px);line-height:1.28;font-weight:700;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:18px;
  font-size:13.5px;color:var(--c-text-2);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:#C3BEDA;}
.meta-item{display:inline-flex;align-items:center;gap:6px;}

/* ---------- 布局 ---------- */
.article-wrap{padding:48px 0 var(--sp-section);}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:44px;align-items:start;}
.article-main{min-width:0;}

/* ---------- 封面 ---------- */
.cover-figure{margin:0 0 34px;}
.cover-figure img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-img);border:1px solid var(--c-border);box-shadow:var(--sh-1);
}
.cover-figure figcaption{margin-top:10px;font-size:13px;color:var(--c-text-2);text-align:center;}

/* ---------- 正文排版 ---------- */
.article-body{
  max-width:760px;font-size:16.5px;line-height:1.92;color:#211E2E;
}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
  font-size:clamp(22px,2.6vw,29px);line-height:1.4;margin:44px 0 16px;
  padding-left:14px;border-left:4px solid var(--c-primary);
}
.article-body h3{font-size:20px;line-height:1.5;margin:30px 0 12px;color:var(--c-primary-deep);}
.article-body h4{font-size:17px;margin:22px 0 10px;}
.article-body p{margin:0 0 1.2em;}
.article-body ul,.article-body ol{padding-left:1.4em;margin:0 0 1.25em;}
.article-body li{margin-bottom:.5em;}
.article-body a{color:var(--c-primary);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px;}
.article-body a:hover{color:var(--c-primary-deep);}
.article-body strong{color:var(--c-ink);font-weight:700;}
.article-body blockquote{
  margin:26px 0;padding:16px 22px;border-left:3px solid var(--c-primary);
  background:var(--c-primary-soft);border-radius:0 12px 12px 0;color:#37324F;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:12px;margin:24px auto;border:1px solid var(--c-border);}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;
  border:1px solid var(--c-border);border-radius:12px;overflow:hidden;
}
.article-body thead th{background:#F2EFFC;color:var(--c-ink);font-weight:600;}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--c-border);text-align:left;}
.article-body tbody tr:nth-child(even){background:#FBFAFF;}
.article-body hr{border:0;border-top:1px solid var(--c-border);margin:32px 0;}
.article-body code{
  background:var(--c-primary-soft);color:var(--c-primary-deep);
  padding:2px 6px;border-radius:6px;font-size:.92em;
}

/* ---------- 空态 ---------- */
.empty-state{
  max-width:760px;padding:44px 36px;text-align:center;
  background:var(--c-surface);border:1px dashed #D8D2EF;border-radius:var(--r-card);
}
.empty-state h2{font-size:22px;margin-bottom:12px;}
.empty-state p{color:var(--c-text-2);margin-bottom:22px;}

/* ---------- 标签与返回 ---------- */
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:38px 0 0;}
.tag-row .tag-label{font-size:13.5px;color:var(--c-text-2);}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--c-surface);border:1px solid var(--c-border);font-size:13px;color:var(--c-text-2);
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.tag:hover{border-color:#CFC7F3;color:var(--c-primary);background:#FBFAFF;}
.back-row{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  margin-top:30px;padding:18px 22px;background:var(--c-surface);
  border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-1);
}
.back-row p{margin:0;font-size:14px;color:var(--c-text-2);}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;}
.link-arrow::after{content:"→";transition:transform .2s ease;}
.link-arrow:hover::after{transform:translateX(3px);}

/* ---------- 相关推荐 ---------- */
.rel-section{margin-top:48px;}
.rel-section > h2{font-size:22px;margin-bottom:18px;}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.rel-card{
  display:block;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#DCD6F5;}
.rel-card img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.rel-card .rel-body{padding:14px 16px 18px;}
.rel-card h3{font-size:15.5px;line-height:1.6;margin-bottom:8px;}
.rel-card:hover h3{color:var(--c-primary);}
.rel-card span{font-size:13px;color:var(--c-text-2);}

/* ---------- 侧栏 ---------- */
.article-side{position:sticky;top:88px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:20px 20px 18px;box-shadow:var(--sh-1);
}
.side-card h3{font-size:15.5px;margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--c-border);}
.toc-list{list-style:none;margin:0;padding:0;}
.toc-list li{margin-bottom:10px;}
.toc-list a{font-size:14px;color:var(--c-text-2);display:block;line-height:1.6;}
.toc-list a:hover{color:var(--c-primary);}
.side-list{list-style:none;margin:0;padding:0;}
.side-list li{padding:11px 0;border-bottom:1px dashed var(--c-border);}
.side-list li:last-child{border-bottom:0;padding-bottom:0;}
.side-list a{font-size:14px;color:#332F49;line-height:1.6;}
.side-list a:hover{color:var(--c-primary);}
.side-cta{
  background:linear-gradient(155deg,#2E1C8F 0%,#1B114F 100%);
  border:0;color:#fff;border-radius:var(--r-card);
}
.side-cta h3{color:#fff;border-bottom-color:rgba(255,255,255,.16);}
.side-cta p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.78);margin-bottom:16px;}
.side-cta .btn{width:100%;}
.side-stat{display:flex;gap:10px;margin-top:16px;}
.side-stat div{flex:1;background:rgba(255,255,255,.08);border-radius:10px;padding:10px 8px;text-align:center;}
.side-stat strong{display:block;font-size:18px;color:#fff;}
.side-stat span{font-size:12px;color:rgba(255,255,255,.7);}

/* ---------- 底部 CTA ---------- */
.cta-band{
  background:var(--c-ink);border-radius:20px;overflow:hidden;position:relative;
  margin-top:8px;
}
.cta-band::after{
  content:"";position:absolute;left:-100px;bottom:-160px;width:380px;height:380px;border-radius:50%;
  background:radial-gradient(circle,rgba(75,46,209,.45),rgba(75,46,209,0) 70%);
}
.cta-band-inner{
  position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;
  gap:32px;padding:44px 44px;
}
.cta-band h2{color:#fff;font-size:clamp(21px,2.4vw,27px);line-height:1.4;max-width:560px;}
.cta-band p{margin:12px 0 0;color:rgba(255,255,255,.72);font-size:14.5px;max-width:560px;}
.cta-actions{display:flex;gap:12px;flex:0 0 auto;}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.34);}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.10);color:#fff;border-color:rgba(255,255,255,.6);}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:var(--sp-section);background:#171528;color:rgba(255,255,255,.72);}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding:56px 0 40px;}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.foot-brand .brand-mark{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.14);}
.foot-brand strong{color:#fff;font-size:16.5px;}
.foot-about{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);margin:0;}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;}
.foot-links{list-style:none;margin:0;padding:0;}
.foot-links li{margin-bottom:10px;}
.foot-links a{font-size:14px;color:rgba(255,255,255,.66);}
.foot-links a:hover{color:#fff;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px;}
.foot-note{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.55);margin:0 0 10px;}
.foot-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  padding:20px 0 26px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:70;width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;border:1px solid var(--c-border);
  background:#fff;color:var(--c-primary);cursor:pointer;box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(8px);transition:all .22s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--c-primary-soft);}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .search-box input{width:150px;}
  .main-nav{gap:20px;}
  .nav-link{font-size:14.5px;}
}
@media (max-width:1080px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:36px;}
  .article-side{position:static;flex-direction:row;flex-wrap:wrap;}
  .article-side > *{flex:1 1 280px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:980px){
  .nav-toggle{display:inline-block;}
  .header-inner{height:56px;gap:14px;}
  .main-nav{
    position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--c-border);box-shadow:var(--sh-2);
    padding:8px 24px 18px;display:none;
  }
  .main-nav.is-open{display:flex;}
  .main-nav .nav-link{padding:13px 0;border-bottom:1px dashed var(--c-border);font-size:15px;}
  .main-nav .nav-link:last-child{border-bottom:0;}
  .nav-link::after{display:none;}
  .search-box{display:none;}
  .header-actions{margin-left:auto;}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band-inner{flex-direction:column;align-items:flex-start;padding:36px 28px;gap:24px;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .container{padding:0 16px;}
  :root{--sp-section:52px;}
  .page-head-inner{padding:32px 0 30px;}
  .article-wrap{padding:32px 0 var(--sp-section);}
  .article-body{font-size:16px;}
  .article-body h2{margin:34px 0 14px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
  .rel-grid{grid-template-columns:minmax(0,1fr);}
  .back-row{flex-direction:column;align-items:flex-start;}
  .foot-grid{grid-template-columns:1fr;padding:40px 0 30px;gap:26px;}
  .foot-bottom{flex-direction:column;align-items:flex-start;}
  .brand-text{font-size:15.5px;}
  .crumbs{font-size:13px;}
  .crumb-current{max-width:240px;}
}
@media (max-width:520px){
  .article-title{font-size:25px;}
  .cta-band-inner{padding:28px 20px;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .empty-state{padding:32px 20px;}
  .side-stat{flex-wrap:wrap;}
}

/* roulang page: category1 */
:root{
  --c-primary:#4B2ED1;
  --c-primary-deep:#2E1C8F;
  --c-accent:#FF7A45;
  --c-accent2:#12B8A6;
  --c-ink:#14121F;
  --c-bg:#F7F6FB;
  --c-surface:#FFFFFF;
  --c-border:#E7E4F2;
  --c-text-2:#5C5870;
  --radius-card:14px;
  --radius-img:18px;
  --radius-btn:999px;
  --shadow-sm:0 2px 8px rgba(20,18,31,.06);
  --shadow-md:0 10px 24px rgba(20,18,31,.10);
  --container:1200px;
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.9;
  color:var(--c-ink);
  background:var(--c-bg);
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{text-decoration:underline}
ul,ol{margin:0;padding:0}
button,input{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:8px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15.5px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:transform .18s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  text-decoration:none;white-space:nowrap;
}
.btn:hover{text-decoration:none}
.btn-primary{
  background:linear-gradient(135deg,#4B2ED1 0%,#2E1C8F 100%);
  color:#fff;box-shadow:0 8px 18px rgba(75,46,209,.24);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 12px 26px rgba(75,46,209,.30)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:#fff;color:var(--c-primary-deep);border:1px solid var(--c-border);
  border-radius:12px;box-shadow:var(--shadow-sm);
}
.btn-ghost:hover{border-color:rgba(75,46,209,.45);background:#F7F5FF}
.btn-ghost:active{transform:translateY(1px)}
.btn-light{background:#fff;color:var(--c-primary-deep);box-shadow:0 8px 18px rgba(0,0,0,.16)}
.btn-light:hover{background:#F3F1FF}
.btn-outline-light{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.45);border-radius:12px}
.btn-outline-light:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.75)}
.btn-sm{padding:9px 20px;font-size:14.5px}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;background:#fff;
  border-bottom:1px solid var(--c-border);box-shadow:0 1px 0 rgba(20,18,31,.03);
}
.header-inner{display:flex;align-items:center;gap:20px;height:64px;position:relative}
.brand{display:flex;align-items:center;gap:10px;color:var(--c-ink);flex:none}
.brand:hover{text-decoration:none}
.brand-mark{
  width:36px;height:36px;border:2px solid var(--c-primary);border-radius:10px;
  display:grid;place-items:center;background:#F1EEFF;box-shadow:2px 2px 0 rgba(75,46,209,.16);flex:none;
}
.brand-mark svg{width:20px;height:20px}
.brand-text{font-size:16px;font-weight:700;white-space:nowrap;letter-spacing:.01em}
.main-nav{display:flex;align-items:center;gap:2px;margin:0 auto}
.nav-link{position:relative;padding:10px 12px;font-size:15px;color:var(--c-text-2);border-radius:9px;white-space:nowrap}
.nav-link:hover{color:var(--c-primary);background:#F5F2FF;text-decoration:none}
.nav-link.is-active{color:var(--c-primary);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:12px;flex:none}
.search-box input{
  width:190px;height:40px;padding:0 16px;border:1px solid var(--c-border);
  border-radius:999px;background:#FAF9FE;color:var(--c-ink);font-size:14px;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.search-box input::placeholder{color:#9A96AD}
.search-box input:focus{
  outline:none;border-color:var(--c-primary);background:#fff;
  box-shadow:0 0 0 3px rgba(75,46,209,.12);
}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--c-border);border-radius:11px;
  background:#fff;place-items:center;cursor:pointer;transition:background .2s ease,border-color .2s ease;
}
.nav-toggle:hover{background:#F5F2FF;border-color:rgba(75,46,209,.35)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:var(--c-text-2);margin-bottom:18px;
}
.breadcrumb a{color:var(--c-text-2)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:var(--c-ink);font-weight:600}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;padding:46px 0 58px;
  background:
    radial-gradient(620px 320px at 88% 6%,rgba(255,122,69,.20),transparent 68%),
    radial-gradient(520px 300px at 6% 100%,rgba(18,184,166,.13),transparent 70%),
    repeating-linear-gradient(0deg,rgba(75,46,209,.035) 0 1px,transparent 1px 30px),
    repeating-linear-gradient(90deg,rgba(75,46,209,.035) 0 1px,transparent 1px 30px),
    #F7F6FB;
  border-bottom:1px solid var(--c-border);
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.stamp{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.12em;
  color:var(--c-primary-deep);border:1px dashed rgba(75,46,209,.45);border-radius:7px;
  padding:5px 12px;background:#F6F3FF;font-weight:500;
}
.hero h1{
  font-size:clamp(30px,4.4vw,46px);line-height:1.25;font-weight:700;
  margin:16px 0 16px;letter-spacing:.01em;
}
.hero h1 em{font-style:normal;color:var(--c-primary)}
.hero-sub{font-size:17px;line-height:1.85;color:var(--c-text-2);margin:0;max-width:560px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:26px;
  font-size:13.5px;color:var(--c-text-2);
}
.hero-meta span{display:inline-flex;align-items:center;gap:8px}
.hero-meta span::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent2);flex:none;
}
.hero-media{position:relative}
.img-frame{
  border:1px solid var(--c-border);border-radius:var(--radius-img);overflow:hidden;
  background:#fff;box-shadow:8px 8px 0 rgba(75,46,209,.10);
}
.img-frame img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-badge{
  position:absolute;left:-14px;bottom:-16px;background:#fff;border:1px solid var(--c-border);
  border-radius:14px;padding:12px 18px;box-shadow:var(--shadow-md);display:flex;align-items:center;gap:12px;
}
.hero-badge .num{
  font-size:26px;font-weight:700;color:var(--c-primary);line-height:1;
  font-variant-numeric:tabular-nums;
}
.hero-badge .txt{font-size:13px;color:var(--c-text-2);line-height:1.5}

/* ============ 通用板块 ============ */
.section{padding:76px 0}
.section-tight{padding:60px 0}
.section-head{max-width:760px;margin-bottom:38px}
.section-head h2{
  font-size:clamp(23px,3vw,32px);line-height:1.35;font-weight:700;margin:0 0 14px;
}
.section-head p{margin:0;color:var(--c-text-2);font-size:16px}
.section-head .stamp{margin-bottom:14px}
.divider{height:1px;background:var(--c-border);border:0;margin:0}

/* ============ 交替说明流 ============ */
.flow{padding:8px 0 0}
.flow-item{
  display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center;
  padding:38px 0;
}
.flow-item + .flow-item{border-top:1px dashed var(--c-border)}
.flow-item.is-rev .flow-media{order:-1}
.flow-body h3{font-size:21px;line-height:1.45;font-weight:600;margin:12px 0 14px}
.flow-body p{margin:0 0 14px;color:var(--c-text-2);font-size:16px}
.flow-body p:last-child{margin-bottom:0}
.check-list{list-style:none;margin:18px 0 0;display:grid;gap:10px}
.check-list li{position:relative;padding-left:26px;font-size:15.5px;color:var(--c-text-2)}
.check-list li::before{
  content:"";position:absolute;left:4px;top:.7em;width:8px;height:8px;border-radius:2px;
  background:var(--c-accent2);transform:rotate(45deg);
}
.note-strip{
  margin-top:20px;border-left:3px solid var(--c-primary);background:#F6F3FF;
  border-radius:0 12px 12px 0;padding:14px 18px;font-size:15px;color:var(--c-primary-deep);
}

/* ============ 卡片网格 ============ */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.info-card{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-card);
  padding:26px;box-shadow:var(--shadow-sm);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.info-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#D9D3F2}
.info-card .tagline{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--c-accent2);margin-bottom:12px;
}
.info-card .tagline::before{content:"";width:16px;height:2px;background:var(--c-accent2);border-radius:2px}
.info-card h3{font-size:18.5px;line-height:1.5;margin:0 0 10px;font-weight:600}
.info-card p{margin:0;color:var(--c-text-2);font-size:15.5px}

/* ============ 深色区块 ============ */
.dark-band{
  position:relative;overflow:hidden;background:var(--c-ink);color:#E7E4F2;
  border-radius:20px;padding:50px 46px;
}
.dark-band::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,122,69,.28),transparent 70%);
}
.dark-band h2{color:#fff;font-size:clamp(23px,3vw,32px);line-height:1.35;margin:0 0 14px}
.dark-band > p{color:#B4B0C8;margin:0;max-width:640px;font-size:16px}
.band-list{list-style:none;display:grid;gap:20px;margin:30px 0 0;position:relative;z-index:1}
.band-list li{display:grid;grid-template-columns:52px 1fr;gap:18px;align-items:start}
.band-list .idx{
  font-size:26px;font-weight:700;line-height:1.1;color:transparent;
  -webkit-text-stroke:1.4px rgba(255,255,255,.55);
}
.band-list strong{display:block;color:#fff;font-size:17px;font-weight:600;margin-bottom:6px}
.band-list span{color:#B4B0C8;font-size:15.5px}

/* ============ FAQ ============ */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-side h2{font-size:clamp(23px,3vw,30px);line-height:1.35;margin:0 0 14px}
.faq-side p{color:var(--c-text-2);font-size:16px;margin:0 0 20px}
.faq-item{
  background:#fff;border:1px solid var(--c-border);border-radius:12px;
  margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,background .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:#D9D3F2}
.faq-item.is-open{
  border-left:3px solid var(--c-primary);background:#FBFAFF;box-shadow:var(--shadow-sm);
}
.faq-q{
  width:100%;text-align:left;background:none;border:0;padding:18px 20px;
  font-size:16.5px;font-weight:600;color:var(--c-ink);cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-q .mark{
  width:16px;height:16px;flex:none;position:relative;transition:transform .25s ease;
}
.faq-q .mark::before,.faq-q .mark::after{
  content:"";position:absolute;background:var(--c-primary);border-radius:2px;
}
.faq-q .mark::before{left:0;top:7px;width:16px;height:2px}
.faq-q .mark::after{left:7px;top:0;width:2px;height:16px;transition:opacity .25s ease}
.faq-item.is-open .faq-q .mark::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px}
.faq-a p{margin:0 0 18px;font-size:15.5px;color:var(--c-text-2)}

/* ============ 分类互链 ============ */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cat-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-border);
  border-radius:16px;overflow:hidden;box-shadow:var(--shadow-sm);color:var(--c-ink);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.cat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);text-decoration:none;border-color:#D9D3F2}
.cat-card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-bottom:1px solid var(--c-border)}
.cat-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.badge{
  display:inline-block;align-self:flex-start;font-size:12px;font-weight:500;
  padding:4px 11px;border-radius:999px;background:#EFEBFF;color:var(--c-primary-deep);
}
.badge.teal{background:#E2F7F4;color:#0B7E71}
.cat-body h3{font-size:17.5px;line-height:1.5;margin:0;font-weight:600}
.cat-body p{margin:0;font-size:14.8px;color:var(--c-text-2);flex:1}
.more-link{font-size:14.5px;font-weight:600;color:var(--c-primary)}
.more-link::after{content:"→";margin-left:6px;transition:margin .2s ease}
.cat-card:hover .more-link::after{margin-left:10px}

/* ============ 终屏 CTA ============ */
.cta-band{
  background:linear-gradient(135deg,#4B2ED1 0%,#2E1C8F 100%);
  border-radius:20px;padding:48px 46px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  box-shadow:0 18px 40px rgba(46,28,143,.22);
}
.cta-band h2{font-size:clamp(22px,2.8vw,30px);line-height:1.4;margin:0 0 12px;color:#fff}
.cta-band p{margin:0;color:rgba(255,255,255,.82);font-size:15.5px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:14px;
  border:1px solid var(--c-border);background:#fff;color:var(--c-primary);
  display:grid;place-items:center;cursor:pointer;box-shadow:var(--shadow-md);
  opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease;z-index:70;
  font-size:18px;font-weight:700;
}
.to-top.is-visible{opacity:1;pointer-events:auto}
.to-top:hover{transform:translateY(-2px)}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-ink);color:#B4B0C8;padding:66px 0 26px;margin-top:8px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.foot-brand .brand-mark{
  width:36px;height:36px;border:2px solid rgba(255,255,255,.35);border-radius:10px;
  display:grid;place-items:center;background:rgba(255,255,255,.07);
}
.foot-brand .brand-mark svg{width:20px;height:20px}
.foot-brand strong{color:#fff;font-size:16px;font-weight:700}
.foot-about{font-size:14.5px;line-height:1.85;color:#9C97B2;margin:0}
.site-footer h4{color:#fff;font-size:15px;font-weight:600;margin:0 0 16px}
.foot-links{list-style:none;display:grid;gap:11px}
.foot-links a{color:#B4B0C8;font-size:14.5px}
.foot-links a:hover{color:#fff;text-decoration:none}
.foot-note{font-size:14px;line-height:1.85;color:#9C97B2;margin:0 0 12px}
.foot-note:last-child{margin-bottom:0}
.foot-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding-top:22px;
  font-size:13.5px;color:#8A85A0;
}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .header-inner{height:60px}
  .main-nav{
    position:absolute;top:60px;left:0;right:0;display:none;flex-direction:column;
    align-items:stretch;gap:2px;margin:0;padding:12px 20px 20px;
    background:#fff;border-bottom:1px solid var(--c-border);box-shadow:var(--shadow-md);
  }
  .site-header.nav-open .main-nav{display:flex}
  .nav-link{padding:13px 10px;font-size:15.5px}
  .nav-link.is-active::after{display:none}
  .nav-link.is-active{background:#F5F2FF}
  .nav-toggle{display:grid}
  .search-box{display:none}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .faq-layout{grid-template-columns:1fr;gap:26px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:900px){
  .hero{padding:36px 0 48px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .flow-item{grid-template-columns:1fr;gap:24px;padding:32px 0}
  .flow-item.is-rev .flow-media{order:0}
  .card-grid{grid-template-columns:1fr}
  .cta-band{padding:36px 28px}
  .dark-band{padding:38px 26px}
}
@media (max-width:768px){
  body{font-size:16px;line-height:1.85}
  .container{padding:0 16px}
  .section{padding:52px 0}
  .section-tight{padding:42px 0}
  .brand-text{font-size:14.5px}
  .hero-badge{left:0;bottom:-14px;padding:10px 14px}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .foot-bottom{flex-direction:column;gap:8px}
  .to-top{right:14px;bottom:14px}
}
@media (max-width:520px){
  .cat-grid{grid-template-columns:1fr}
  .btn-row{gap:10px}
  .btn-row .btn{flex:1 1 100%}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
  .band-list li{grid-template-columns:38px 1fr;gap:12px}
  .brand-mark{width:32px;height:32px}
  .hero h1{font-size:27px}
}

/* roulang page: category2 */
:root{
  --c-primary:#4B2ED1;
  --c-primary-deep:#2E1C8F;
  --c-accent:#FF7A45;
  --c-accent2:#12B8A6;
  --c-ink:#14121F;
  --c-bg:#F7F6FB;
  --c-surface:#FFFFFF;
  --c-border:#E7E4F2;
  --c-text:#14121F;
  --c-text-2:#5C5870;
  --c-text-3:#8B87A0;
  --radius-card:14px;
  --radius-img:18px;
  --radius-input:10px;
  --radius-btn:12px;
  --shadow-1:0 2px 8px rgba(20,18,31,.06);
  --shadow-2:0 10px 24px rgba(20,18,31,.10);
  --container:1200px;
  --gap:24px;
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.9;
  color:var(--c-text);
  background-color:var(--c-bg);
  background-image:
    linear-gradient(rgba(75,46,209,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(75,46,209,.045) 1px,transparent 1px);
  background-size:32px 32px,32px 32px;
  letter-spacing:.01em;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease,background-color .18s ease;}
a:hover{color:var(--c-primary-deep);}
h1,h2,h3,h4{margin:0;letter-spacing:.01em;color:var(--c-ink);}
h1{font-size:clamp(30px,4.4vw,46px);line-height:1.25;font-weight:700;}
h2{font-size:clamp(23px,3vw,32px);line-height:1.35;font-weight:700;}
h3{font-size:21px;line-height:1.45;font-weight:600;}
p{margin:0 0 1.15em;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
input{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--c-border);
  box-shadow:0 1px 0 rgba(20,18,31,.04);
}
.header-inner{display:flex;align-items:center;gap:20px;height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;flex:0 0 auto;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--c-border);border-radius:10px;
  background:linear-gradient(180deg,#fff,#F4F2FB);
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{font-weight:700;font-size:17px;color:var(--c-ink);letter-spacing:.01em;}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-link{
  position:relative;
  padding:8px 12px;font-size:15px;color:var(--c-text-2);
  border-radius:8px;white-space:nowrap;
}
.nav-link:hover{color:var(--c-primary);background:#F5F3FD;}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;
  height:2px;background:var(--c-primary);border-radius:2px;
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.search-box input{
  width:200px;height:40px;padding:0 14px;
  border:1px solid var(--c-border);border-radius:999px;
  background:#FBFAFE;color:var(--c-text);font-size:14px;
  transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.search-box input::placeholder{color:var(--c-text-3);}
.search-box input:focus{outline:none;border-color:var(--c-primary);background:#fff;box-shadow:0 0 0 3px rgba(75,46,209,.12);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;cursor:pointer;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  padding:12px 24px;border-radius:999px;
  transition:background-color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .12s ease,color .18s ease;
}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,#4B2ED1,#2E1C8F);
  box-shadow:0 4px 14px rgba(75,46,209,.24);
}
.btn-primary:hover{color:#fff;filter:brightness(1.06);box-shadow:0 8px 22px rgba(75,46,209,.30);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{color:var(--c-primary);background:#fff;border-color:var(--c-border);border-radius:var(--radius-btn);}
.btn-ghost:hover{background:#F5F3FD;border-color:#CFC8EE;}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn:disabled{opacity:.4;cursor:not-allowed;}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--c-border);
  border-radius:12px;background:#fff;cursor:pointer;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:11px;width:18px;height:2px;background:var(--c-ink);border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span{top:20px;}
.nav-toggle span::before{top:-6px;left:0;}
.nav-toggle span::after{top:6px;left:0;}

/* ---------- breadcrumb ---------- */
.crumb{background:#fff;border-bottom:1px solid var(--c-border);}
.crumb-inner{display:flex;align-items:center;gap:8px;height:48px;font-size:14px;color:var(--c-text-2);}
.crumb-inner a{color:var(--c-text-2);}
.crumb-inner a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px;}
.crumb-sep{color:var(--c-text-3);}
.crumb-current{color:var(--c-ink);font-weight:600;}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background-color:#fff;
  background-image:linear-gradient(180deg,rgba(247,246,251,.94),rgba(247,246,251,.98)),
                   url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center right;
  border-bottom:1px solid var(--c-border);
}
.page-hero::after{
  content:"";position:absolute;top:-120px;right:-80px;width:420px;height:420px;
  background:radial-gradient(circle,rgba(255,122,69,.20),rgba(255,122,69,0) 68%);
  pointer-events:none;
}
.hero-inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.35fr 1fr;gap:48px;align-items:center;
  padding:52px 0 56px;min-height:288px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;color:var(--c-primary);
  background:#F1EEFC;border:1px solid #DED7F8;border-radius:6px;
  padding:5px 12px;letter-spacing:.06em;
}
.hero-title{margin:18px 0 14px;}
.hero-title em{font-style:normal;color:var(--c-primary);}
.hero-sub{font-size:16.5px;color:var(--c-text-2);max-width:560px;margin-bottom:0;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:500;color:var(--c-text-2);
  background:#fff;border:1px solid var(--c-border);border-radius:999px;
  padding:5px 12px;
}
.tag i{width:7px;height:7px;border-radius:50%;background:var(--c-accent2);display:inline-block;}
.tag.orange i{background:var(--c-accent);}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border:1px solid var(--c-border);box-shadow:var(--shadow-1);
}
.hero-badge{
  position:absolute;left:-14px;bottom:-14px;
  background:#fff;border:1px solid var(--c-border);border-radius:12px;
  padding:10px 14px;box-shadow:var(--shadow-2);
  display:flex;align-items:center;gap:10px;
}
.hero-badge b{font-size:22px;color:var(--c-primary);line-height:1;font-variant-numeric:tabular-nums;}
.hero-badge span{font-size:12.5px;color:var(--c-text-2);}

/* ---------- sections ---------- */
.section{padding:64px 0;}
.section.tight{padding:52px 0 0;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.sec-title{margin-bottom:8px;}
.sec-desc{color:var(--c-text-2);font-size:15.5px;margin:0;max-width:680px;}
.more-link{font-size:14.5px;font-weight:600;white-space:nowrap;}
.more-link:hover{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px;}

/* ---------- layout with sidebar ---------- */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 336px;gap:40px;align-items:start;}

/* ---------- card grid ---------- */
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.info-card{
  position:relative;background:var(--c-surface);
  border:1px solid var(--c-border);border-radius:var(--radius-card);
  padding:26px 24px 22px;
  box-shadow:var(--shadow-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  display:flex;flex-direction:column;
}
.info-card::before{
  content:"";position:absolute;inset:5px;border:1px solid rgba(75,46,209,.07);
  border-radius:10px;pointer-events:none;
}
.info-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#D8D2F2;}
.card-num{
  font-size:13px;font-weight:700;letter-spacing:.12em;
  color:var(--c-primary);opacity:.55;font-variant-numeric:tabular-nums;
}
.info-card h3{margin:10px 0 10px;font-size:19.5px;}
.info-card p{font-size:15px;color:var(--c-text-2);line-height:1.85;margin-bottom:18px;}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;}
.card-link{font-size:14px;font-weight:600;}
.card-link:hover{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px;}
.badge{
  display:inline-flex;align-items:center;
  font-size:12px;font-weight:600;letter-spacing:.02em;
  padding:4px 10px;border-radius:6px;
  background:#E9F7F5;color:#0B7A6D;border:1px solid #C9ECE7;
}
.badge.purple{background:#F1EEFC;color:var(--c-primary-deep);border-color:#DED7F8;}
.badge.orange{background:#FFF1EA;color:#C1440E;border-color:#FFD9C7;}

/* ---------- sidebar ---------- */
.side-bar{display:flex;flex-direction:column;gap:22px;position:sticky;top:88px;}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--radius-card);padding:24px 22px;box-shadow:var(--shadow-1);
}
.side-card h3{font-size:17px;margin-bottom:6px;}
.side-card .side-hint{font-size:13.5px;color:var(--c-text-3);margin-bottom:16px;}
.step-list{counter-reset:s;display:flex;flex-direction:column;gap:16px;}
.step-list li{position:relative;padding-left:42px;}
.step-list li::before{
  counter-increment:s;content:"0" counter(s);
  position:absolute;left:0;top:0;
  width:30px;height:30px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;color:var(--c-primary);
  background:#F1EEFC;border:1px solid #DED7F8;
  font-variant-numeric:tabular-nums;
}
.step-list strong{display:block;font-size:15px;color:var(--c-ink);margin-bottom:2px;}
.step-list span{font-size:13.5px;color:var(--c-text-2);line-height:1.75;}
.stat-row{display:flex;gap:14px;margin-top:4px;}
.stat{
  flex:1;background:#FBFAFE;border:1px solid var(--c-border);
  border-radius:12px;padding:14px 12px;text-align:center;
}
.stat b{display:block;font-size:24px;color:var(--c-accent2);line-height:1.2;font-variant-numeric:tabular-nums;}
.stat span{font-size:12.5px;color:var(--c-text-2);}
.side-cta{
  background:linear-gradient(135deg,#2E1C8F,#4B2ED1);
  border:1px solid #3B27A8;border-radius:var(--radius-card);
  padding:26px 22px;color:#fff;
}
.side-cta h3{color:#fff;font-size:18px;margin-bottom:8px;}
.side-cta p{font-size:14px;color:rgba(255,255,255,.82);line-height:1.8;margin-bottom:16px;}
.side-cta .btn-ghost{background:#fff;border-color:transparent;color:var(--c-primary-deep);}
.side-cta .btn-ghost:hover{background:#F3F0FF;}
.side-links li + li{border-top:1px dashed var(--c-border);}
.side-links a{
  display:block;padding:11px 0;font-size:14.5px;color:var(--c-text-2);
}
.side-links a:hover{color:var(--c-primary);padding-left:4px;}

/* ---------- faq ---------- */
.faq-section{background:#fff;border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border);}
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.faq-left p{font-size:15.5px;color:var(--c-text-2);line-height:1.9;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;border:1px solid var(--c-border);border-radius:12px;
  overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item:hover{border-color:#D8D2F2;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:0;cursor:pointer;text-align:left;
  padding:17px 20px;font-size:16px;font-weight:600;color:var(--c-ink);
}
.faq-q::after{
  content:"";flex:0 0 auto;width:10px;height:10px;
  border-right:2px solid var(--c-text-3);border-bottom:2px solid var(--c-text-3);
  transform:rotate(45deg);transition:transform .22s ease,border-color .18s ease;
  margin-top:-4px;
}
.faq-item.is-open{background:#FAF9FE;border-color:#D8D2F2;box-shadow:inset 3px 0 0 var(--c-primary);}
.faq-item.is-open .faq-q{color:var(--c-primary-deep);}
.faq-item.is-open .faq-q::after{transform:rotate(-135deg);border-color:var(--c-primary);margin-top:4px;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;}
.faq-a p{
  padding:0 20px 18px;margin:0;font-size:15px;color:var(--c-text-2);line-height:1.9;
}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--c-ink);
  border-radius:20px;
  padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  color:#fff;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-70px;width:280px;height:280px;
  background:radial-gradient(circle,rgba(75,46,209,.55),rgba(75,46,209,0) 70%);
}
.cta-copy{position:relative;z-index:1;max-width:640px;}
.cta-copy h2{color:#fff;font-size:clamp(22px,2.6vw,28px);margin-bottom:10px;}
.cta-copy p{color:rgba(255,255,255,.78);font-size:15px;margin:0;}
.cta-actions{position:relative;z-index:1;display:flex;gap:12px;flex-wrap:wrap;}
.cta-actions .btn-primary{background:linear-gradient(135deg,#5B3BE8,#3A22A8);box-shadow:none;}
.cta-actions .btn-ghost{background:transparent;border-color:rgba(255,255,255,.32);color:#fff;}
.cta-actions .btn-ghost:hover{background:rgba(255,255,255,.10);border-color:rgba(255,255,255,.5);color:#fff;}
.cta-note{font-size:13px;color:rgba(255,255,255,.55);margin-top:14px;}

/* ---------- related ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.rel-card{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);display:flex;flex-direction:column;
  transition:transform .18s ease,box-shadow .18s ease;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.rel-card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0;border-bottom:1px solid var(--c-border);}
.rel-body{padding:20px;display:flex;flex-direction:column;gap:8px;flex:1;}
.rel-body h3{font-size:17px;}
.rel-body p{font-size:14px;color:var(--c-text-2);margin:0;line-height:1.8;}
.rel-body .card-link{margin-top:auto;padding-top:6px;}

/* ---------- footer ---------- */
.site-footer{margin-top:80px;background:#fff;border-top:1px solid var(--c-border);padding:56px 0 26px;}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.foot-brand strong{font-size:16.5px;color:var(--c-ink);}
.foot-about{font-size:14px;color:var(--c-text-2);line-height:1.85;margin:0;max-width:330px;}
.site-footer h4{font-size:15px;margin-bottom:16px;color:var(--c-ink);}
.foot-links li{margin-bottom:10px;}
.foot-links a{font-size:14px;color:var(--c-text-2);}
.foot-links a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px;}
.foot-note{font-size:13.5px;color:var(--c-text-3);line-height:1.8;margin-bottom:12px;}
.foot-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--c-border);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--c-text-3);
}

/* ---------- to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:70;
  width:44px;height:44px;border-radius:12px;border:1px solid var(--c-border);
  background:#fff;color:var(--c-primary);cursor:pointer;
  box-shadow:var(--shadow-1);display:none;align-items:center;justify-content:center;
  font-size:16px;
}
.to-top:hover{box-shadow:var(--shadow-2);border-color:#D8D2F2;}
.to-top.is-show{display:flex;}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .layout{grid-template-columns:minmax(0,1fr) 300px;gap:32px;}
  .foot-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:1079px){
  .main-nav{display:none;}
  .nav-toggle{display:inline-block;}
  .main-nav.is-open{
    display:flex;flex-direction:column;align-items:stretch;
    position:absolute;left:0;right:0;top:64px;
    background:#fff;border-bottom:1px solid var(--c-border);
    padding:12px 24px 18px;gap:2px;box-shadow:var(--shadow-2);
  }
  .main-nav.is-open .nav-link{padding:12px 8px;font-size:15.5px;}
  .main-nav.is-open .nav-link.is-active::after{display:none;}
  .layout{grid-template-columns:1fr;gap:40px;}
  .side-bar{position:static;}
  .hero-inner{grid-template-columns:1fr;gap:32px;padding:40px 0 44px;}
  .hero-visual img{aspect-ratio:16/9;}
  .faq-wrap{grid-template-columns:1fr;gap:28px;}
  .rel-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 16px;}
  .search-box{display:none;}
  .header-inner{height:56px;}
  .brand-text{font-size:15.5px;}
  .main-nav.is-open{top:56px;}
  .section{padding:44px 0;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:24px;}
  .card-grid{grid-template-columns:1fr;}
  .rel-grid{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px;gap:22px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .foot-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  h1{font-size:28px;}
  h2{font-size:22px;}
  .info-card{padding:22px 18px 18px;}
  .hero-badge{left:8px;bottom:-12px;padding:8px 12px;}
  .hero-badge b{font-size:19px;}
  .foot-grid{grid-template-columns:1fr;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .to-top{right:16px;bottom:16px;}
}

/* roulang page: category3 */
:root{
  --c-primary:#4B2ED1;
  --c-primary-deep:#2E1C8F;
  --c-accent:#FF7A45;
  --c-accent2:#12B8A6;
  --c-ink:#14121F;
  --c-bg:#F7F6FB;
  --c-surface:#FFFFFF;
  --c-border:#E7E4F2;
  --c-text-2:#5C5870;
  --r-card:14px;
  --r-img:18px;
  --r-input:10px;
  --r-btn:12px;
  --shadow-sm:0 2px 8px rgba(20,18,31,.06);
  --shadow-lg:0 10px 24px rgba(20,18,31,.10);
  --sp-section:80px;
  --sp-section-m:48px;
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:12px;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
a:hover{color:var(--c-primary-deep);}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--c-border);
  box-shadow:0 1px 0 rgba(20,18,31,.03);
}
.header-inner{display:flex;align-items:center;gap:20px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  background:rgba(75,46,209,.08);
  border:1px solid var(--c-border);
  display:grid;place-items:center;
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{font-size:17px;font-weight:700;color:var(--c-ink);letter-spacing:.01em;white-space:nowrap;}
.brand:hover .brand-text{color:var(--c-primary);}

.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  position:relative;
  padding:8px 12px;
  border-radius:10px;
  font-size:15px;
  color:var(--c-text-2);
  white-space:nowrap;
}
.nav-link:hover{color:var(--c-primary);background:rgba(75,46,209,.06);}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:12px;}
.search-box input{
  height:40px;width:190px;
  border:1px solid var(--c-border);
  border-radius:999px;
  background:#FAF9FE;
  padding:0 16px;font-size:14px;
  transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.search-box input::placeholder{color:#9B97AC;}
.search-box input:focus{
  outline:none;background:#fff;
  border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(75,46,209,.12);
}
.nav-toggle{
  display:none;position:relative;
  width:40px;height:40px;padding:0;
  border:1px solid var(--c-border);border-radius:10px;background:#fff;
}
.nav-toggle span{position:absolute;left:11px;right:11px;top:50%;height:2px;background:var(--c-ink);border-radius:2px;transform:translateY(-50%);}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;right:0;height:2px;background:var(--c-ink);border-radius:2px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;
  border:none;border-radius:999px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  cursor:pointer;text-decoration:none;
  transition:filter .2s ease,transform .12s ease,box-shadow .2s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-primary{
  background:linear-gradient(135deg,#4B2ED1,#3B23AE);
  color:#fff;
  box-shadow:0 6px 16px rgba(75,46,209,.20);
}
.btn-primary:hover{filter:brightness(.93);color:#fff;box-shadow:0 8px 20px rgba(75,46,209,.26);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:#fff;color:var(--c-primary);
  border:1px solid rgba(75,46,209,.35);
  border-radius:12px;
}
.btn-ghost:hover{background:rgba(75,46,209,.06);color:var(--c-primary-deep);border-color:var(--c-primary);}
.btn-ghost:active{transform:translateY(1px);}
.btn-light{
  background:#fff;color:var(--c-ink);
  border:1px solid rgba(255,255,255,.6);
}
.btn-light:hover{background:rgba(255,255,255,.86);color:var(--c-ink);}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;}

/* ============ 标签 / 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:500;line-height:1.4;
  background:rgba(75,46,209,.08);color:var(--c-primary);
  border:1px solid rgba(75,46,209,.16);
}
.badge-teal{background:rgba(18,184,166,.10);color:#0E8C7E;border-color:rgba(18,184,166,.22);}
.badge-amber{background:rgba(255,122,69,.10);color:#C1552A;border-color:rgba(255,122,69,.24);}

/* ============ 面包屑 ============ */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.78);}
.crumb a{color:rgba(255,255,255,.88);}
.crumb a:hover{color:#fff;border-bottom:2px solid rgba(255,255,255,.7);}
.crumb .sep{opacity:.55;}
.crumb .current{color:#fff;font-weight:500;}

/* ============ 矮版首屏 ============ */
.page-hero{
  position:relative;
  padding:52px 0 56px;
  background-color:var(--c-primary-deep);
  background-image:linear-gradient(115deg,rgba(24,16,68,.94) 0%,rgba(46,28,143,.86) 46%,rgba(75,46,209,.70) 100%),url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  color:#fff;
  overflow:hidden;
  min-height:280px;
}
.page-hero::after{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,122,69,.42),rgba(255,122,69,0) 68%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.page-hero h1{
  margin:18px 0 14px;
  font-size:clamp(30px,4.4vw,44px);
  line-height:1.25;font-weight:700;
  letter-spacing:.01em;
}
.page-hero h1 .k{color:#FFD9C7;}
.page-hero .lead{
  max-width:720px;
  font-size:17px;line-height:1.9;
  color:rgba(255,255,255,.90);
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.hero-tags span{
  padding:6px 12px;border-radius:999px;
  font-size:13px;
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.24);
  color:#fff;
}

/* ============ 通用板块 ============ */
.section{padding:var(--sp-section) 0;}
.section-sm{padding:56px 0;}
.section-alt{background:#fff;border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border);}
.sec-head{max-width:760px;margin-bottom:36px;}
.sec-head h2{
  font-size:clamp(23px,3vw,32px);
  line-height:1.35;font-weight:700;
  letter-spacing:.01em;
  margin-bottom:14px;
}
.sec-head p{color:var(--c-text-2);font-size:16px;line-height:1.9;}
.sec-head .badge{margin-bottom:14px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--c-primary);text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--c-primary);border-radius:2px;}

/* 快速自检条 */
.checkbar{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);
  padding:22px 24px;
  margin-top:-38px;position:relative;z-index:5;
}
.checkbar .ck{display:flex;align-items:flex-start;gap:12px;}
.checkbar .ck b{display:block;font-size:15px;font-weight:600;}
.checkbar .ck span{display:block;font-size:13px;color:var(--c-text-2);line-height:1.7;}
.ck-num{
  flex:0 0 auto;width:30px;height:30px;border-radius:9px;
  display:grid;place-items:center;
  font-size:13px;font-weight:700;color:var(--c-primary);
  border:1px solid rgba(75,46,209,.28);
  background:rgba(75,46,209,.05);
}

/* ============ 纵向清单 / 时间轴 ============ */
.timeline{position:relative;padding-top:6px;}
.timeline::before{
  content:"";position:absolute;left:21px;top:14px;bottom:14px;width:2px;
  background:linear-gradient(180deg,rgba(75,46,209,.42),rgba(18,184,166,.30));
  border-radius:2px;
}
.tl-item{position:relative;padding-left:66px;margin-bottom:24px;}
.tl-item:last-child{margin-bottom:0;}
.tl-dot{
  position:absolute;left:6px;top:6px;
  width:32px;height:32px;border-radius:50%;
  background:#fff;border:2px solid var(--c-primary);
  color:var(--c-primary);font-size:13px;font-weight:700;
  display:grid;place-items:center;z-index:2;
}
.tl-card{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);
  padding:22px 24px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.tl-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:#D9D4EC;}
.tl-card h3{
  font-size:20px;line-height:1.45;font-weight:600;
  margin-bottom:10px;
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
}
.tl-card p{color:var(--c-text-2);font-size:16px;line-height:1.9;}
.tl-tips{margin-top:14px;padding-top:14px;border-top:1px dashed var(--c-border);display:flex;flex-wrap:wrap;gap:10px;}
.tl-tips span{
  font-size:13px;color:var(--c-text-2);
  background:#F4F2FB;border:1px solid var(--c-border);
  border-radius:8px;padding:5px 10px;
}

/* ============ 图文区块 ============ */
.split{display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center;}
.split.reverse{grid-template-columns:5fr 7fr;}
.split img{
  border-radius:var(--r-img);
  border:1px solid var(--c-border);
  box-shadow:var(--shadow-lg);
  width:100%;object-fit:cover;
}
.split h2{font-size:clamp(23px,3vw,30px);line-height:1.35;font-weight:700;margin-bottom:16px;}
.split p{color:var(--c-text-2);font-size:16px;line-height:1.9;margin-bottom:14px;}
.step-list{margin-top:20px;display:grid;gap:14px;}
.step-list li{display:flex;gap:14px;align-items:flex-start;}
.step-list .n{
  flex:0 0 auto;width:28px;height:28px;border-radius:8px;
  background:rgba(18,184,166,.10);color:#0E8C7E;
  font-size:13px;font-weight:700;
  display:grid;place-items:center;
  border:1px solid rgba(18,184,166,.24);
}
.step-list b{font-weight:600;}
.step-list span{color:var(--c-text-2);font-size:15px;line-height:1.8;}

/* ============ 提示卡网格 ============ */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.card{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);
  padding:24px;
  display:flex;flex-direction:column;gap:12px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:#D9D4EC;}
.card h3{font-size:19px;line-height:1.45;font-weight:600;}
.card p{color:var(--c-text-2);font-size:15px;line-height:1.85;}
.card .line{height:1px;background:var(--c-border);margin:2px 0;}
.card .meta{font-size:13px;color:var(--c-text-2);}
.card .num-outline{
  font-size:38px;font-weight:700;line-height:1;
  color:transparent;-webkit-text-stroke:1.5px rgba(75,46,209,.35);
}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.faq-side h2{font-size:clamp(23px,3vw,30px);line-height:1.35;font-weight:700;margin-bottom:14px;}
.faq-side p{color:var(--c-text-2);font-size:15px;line-height:1.9;margin-bottom:20px;}
.faq-list{display:grid;gap:12px;}
.faq-item{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  transition:border-color .2s ease,background-color .2s ease;
}
.faq-item summary{
  list-style:none;cursor:pointer;
  padding:18px 22px;
  font-size:16px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";flex:0 0 auto;
  width:10px;height:10px;
  border-right:2px solid var(--c-primary);
  border-bottom:2px solid var(--c-primary);
  transform:rotate(45deg);
  transition:transform .22s ease;
  margin-top:-4px;
}
.faq-item[open]{border-left:3px solid var(--c-primary);background:#FAF9FE;}
.faq-item[open] summary::after{transform:rotate(-135deg);margin-top:3px;}
.faq-item .faq-body{padding:0 22px 20px;color:var(--c-text-2);font-size:15px;line-height:1.9;}
.faq-item summary:hover{color:var(--c-primary);}

/* ============ CTA 终屏 ============ */
.cta-band{
  position:relative;
  background-color:var(--c-ink);
  background-image:linear-gradient(120deg,rgba(20,18,31,.95) 0%,rgba(46,28,143,.88) 100%),url("/assets/images/backpic/back-3.webp");
  background-size:cover;background-position:center;
  color:#fff;
  border-radius:20px;
  padding:44px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  overflow:hidden;
}
.cta-band h2{font-size:clamp(22px,2.6vw,28px);line-height:1.4;font-weight:700;margin-bottom:10px;}
.cta-band p{color:rgba(255,255,255,.82);font-size:15px;line-height:1.85;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex-shrink:0;}
.cta-note{margin-top:14px;font-size:13px;color:rgba(255,255,255,.62);}

/* ============ 相关分类 ============ */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.rel-card{
  display:flex;flex-direction:column;gap:10px;
  padding:22px;
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:#D9D4EC;}
.rel-card strong{font-size:17px;font-weight:600;color:var(--c-ink);}
.rel-card span{font-size:14px;color:var(--c-text-2);line-height:1.8;}
.rel-card .go{font-size:14px;font-weight:600;color:var(--c-primary);margin-top:auto;}
.rel-card:hover strong{color:var(--c-primary);}

/* ============ 页脚 ============ */
.site-footer{
  background:#161326;
  color:rgba(255,255,255,.78);
  padding:64px 0 28px;
  margin-top:var(--sp-section);
}
.foot-grid{display:grid;grid-template-columns:2fr 1.2fr 1.2fr 1.4fr;gap:40px;}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.foot-brand .brand-mark{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.16);}
.foot-brand strong{color:#fff;font-size:16px;font-weight:700;}
.foot-about{font-size:14px;line-height:1.9;color:rgba(255,255,255,.66);}
.site-footer h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.foot-links{display:grid;gap:10px;}
.foot-links a{font-size:14px;color:rgba(255,255,255,.68);}
.foot-links a:hover{color:#fff;}
.foot-note{font-size:13px;line-height:1.85;color:rgba(255,255,255,.58);margin-bottom:10px;}
.foot-bottom{
  margin-top:44px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.52);
}

/* 返回顶部 */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:70;
  width:44px;height:44px;border-radius:50%;
  border:1px solid var(--c-border);background:#fff;color:var(--c-primary);
  box-shadow:var(--shadow-lg);
  display:grid;place-items:center;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary);}
.to-top svg{width:18px;height:18px;}

/* ============ 响应式 ============ */
@media (max-width:1079px){
  .nav-toggle{display:block;}
  .main-nav{
    display:none;
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:2px;
    margin:0;padding:10px 16px 16px;
    background:#fff;
    border-bottom:1px solid var(--c-border);
    box-shadow:0 14px 28px rgba(20,18,31,.10);
  }
  .main-nav.open{display:flex;}
  .nav-link{padding:12px 12px;}
  .nav-link.is-active::after{display:none;}
  .nav-link.is-active{background:rgba(75,46,209,.07);}
  .header-actions{margin-left:auto;}
  .split,.split.reverse{grid-template-columns:1fr;gap:28px;}
  .faq-wrap{grid-template-columns:1fr;gap:28px;}
  .footer-grid{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .rel-grid{grid-template-columns:repeat(2,1fr);}
  .checkbar{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:860px){
  .search-box{display:none;}
}
@media (max-width:768px){
  :root{--sp-section:56px;}
  .container{padding:0 16px;}
  .header-inner{height:56px;gap:12px;}
  .brand-text{font-size:15px;}
  .page-hero{padding:36px 0 42px;min-height:240px;}
  .page-hero .lead{font-size:15px;}
  .section{padding:var(--sp-section) 0;}
  .card-grid,.rel-grid{grid-template-columns:1fr;}
  .checkbar{grid-template-columns:1fr;margin-top:-28px;padding:18px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:30px 22px;border-radius:16px;}
  .cta-actions{width:100%;}
  .tl-item{padding-left:56px;}
  .timeline::before{left:19px;}
  .tl-dot{left:4px;width:30px;height:30px;}
}
@media (max-width:520px){
  body{font-size:15px;line-height:1.85;}
  h1,h2,h3{letter-spacing:0;}
  .page-hero h1{font-size:26px;}
  .sec-head h2,.split h2,.faq-side h2{font-size:22px;}
  .tl-card{padding:18px;}
  .tl-card h3{font-size:18px;}
  .foot-grid{grid-template-columns:1fr;}
  .foot-bottom{flex-direction:column;gap:6px;}
  .btn{width:100%;}
  .cta-actions .btn{width:100%;}
  .to-top{right:14px;bottom:16px;}
}

/* roulang page: category4 */
:root{
  --c-primary:#4B2ED1;
  --c-primary-deep:#2E1C8F;
  --c-accent:#FF7A45;
  --c-accent2:#12B8A6;
  --c-ink:#14121F;
  --c-bg:#F7F6FB;
  --c-surface:#FFFFFF;
  --c-border:#E7E4F2;
  --c-text-2:#5C5870;
  --r-card:14px;
  --r-img:18px;
  --r-input:10px;
  --r-btn:999px;
  --sh-1:0 2px 8px rgba(20,18,31,.06);
  --sh-2:0 10px 24px rgba(20,18,31,.10);
  --maxw:1200px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.9;
  letter-spacing:.01em;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease;}
a:hover{color:var(--c-primary-deep);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px;}
button{font:inherit;color:inherit;cursor:pointer;}
input{font:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:.01em;}
p{margin:0 0 1.15em;}
ul{margin:0;padding:0;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.skip-link{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 18px;border-radius:0 0 12px 0;z-index:200;}
.skip-link:focus{left:0;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--c-border);
  box-shadow:0 1px 0 rgba(20,18,31,.03);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--c-ink);font-weight:700;flex:0 0 auto;}
.brand:hover{text-decoration:none;color:var(--c-primary);}
.brand-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:#F1EEFF;border:1px solid var(--c-border);flex:0 0 auto;}
.brand-mark svg{width:20px;height:20px;}
.brand-text{font-size:16px;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:4px;}
.nav-link{position:relative;padding:8px 12px;font-size:14.5px;color:var(--c-text-2);border-radius:8px;white-space:nowrap;}
.nav-link:hover{color:var(--c-primary);background:#F5F3FF;text-decoration:none;}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.nav-link.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;border-radius:2px;background:var(--c-primary);}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.search-box{display:flex;}
.search-box input{
  height:40px;width:196px;padding:0 14px;border-radius:var(--r-input);
  border:1px solid var(--c-border);background:#FAF9FE;font-size:14px;color:var(--c-ink);
  transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.search-box input::placeholder{color:#9A96AD;}
.search-box input:focus{outline:none;border-color:var(--c-primary);background:#fff;box-shadow:0 0 0 3px rgba(75,46,209,.12);}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--c-border);
  background:#fff;position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:50%;width:16px;height:2px;background:var(--c-ink);border-radius:2px;
  transform:translateX(-50%);transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";left:0;top:-5px;transform:none;}
.nav-toggle span::after{content:"";left:0;top:5px;transform:none;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-5px) rotate(-45deg);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--r-btn);
  padding:12px 26px;font-size:15px;font-weight:600;line-height:1.4;
  cursor:pointer;transition:filter .18s ease,box-shadow .18s ease,transform .12s ease,color .18s ease,border-color .18s ease,background-color .18s ease;
}
.btn:hover{text-decoration:none;}
.btn:active{transform:translateY(1px);}
.btn-primary{background:linear-gradient(135deg,#4B2ED1,#2E1C8F);color:#fff;box-shadow:0 6px 16px rgba(75,46,209,.22);}
.btn-primary:hover{filter:brightness(1.07);color:#fff;box-shadow:0 10px 22px rgba(75,46,209,.28);}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 6px 16px rgba(255,122,69,.24);}
.btn-accent:hover{filter:brightness(1.06);color:#fff;}
.btn-ghost{background:#fff;border-color:var(--c-border);color:var(--c-ink);}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn:disabled{opacity:.4;pointer-events:none;}

/* ---------- page hero ---------- */
.page-hero{position:relative;overflow:hidden;padding:clamp(30px,4.4vw,58px) 0 clamp(38px,5vw,70px);}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:linear-gradient(180deg,rgba(247,246,251,.92),rgba(247,246,251,.985)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.page-hero::after{
  content:"";position:absolute;top:-140px;right:-90px;width:440px;height:440px;z-index:0;
  background:radial-gradient(circle,rgba(75,46,209,.16),rgba(75,46,209,0) 68%);
}
.page-hero .container{position:relative;z-index:1;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-2);margin-bottom:20px;}
.crumb a{color:var(--c-text-2);}
.crumb a:hover{color:var(--c-primary);}
.crumb .sep{opacity:.5;}
.hero-title{font-size:clamp(27px,3.5vw,40px);line-height:1.32;font-weight:700;max-width:900px;margin-bottom:16px;}
.hero-sub{margin:0;max-width:730px;color:var(--c-text-2);font-size:16.5px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;
  background:#fff;border:1px solid var(--c-border);font-size:13px;color:var(--c-text-2);
}
.tag strong{color:var(--c-primary);font-weight:600;}

/* ---------- sections ---------- */
.section{padding:clamp(44px,5.6vw,80px) 0;}
.section-alt{background:#fff;border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border);}
.section-head{max-width:780px;margin-bottom:36px;}
.eyebrow{display:inline-block;font-size:12.5px;font-weight:600;letter-spacing:.16em;color:var(--c-primary);margin-bottom:12px;}
.section-title{font-size:clamp(22px,2.6vw,30px);line-height:1.35;font-weight:700;margin-bottom:14px;}
.section-desc{margin:0;color:var(--c-text-2);}

/* ---------- quick grid ---------- */
.quick-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.quick-card{
  display:flex;flex-direction:column;gap:12px;background:var(--c-surface);
  border:1px solid var(--c-border);border-radius:var(--r-card);padding:24px 22px;
  box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.quick-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D9D3F2;}
.quick-num{
  font-size:26px;font-weight:700;line-height:1;
  color:rgba(75,46,209,.20);-webkit-text-stroke:1px rgba(75,46,209,.55);letter-spacing:.03em;
}
.quick-card h3{font-size:17.5px;line-height:1.5;font-weight:600;}
.quick-card p{margin:0;font-size:14.5px;line-height:1.85;color:var(--c-text-2);}
.quick-card .quick-link{margin-top:auto;font-size:14px;font-weight:600;}

/* ---------- table ---------- */
.table-wrap{
  overflow-x:auto;background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-card);box-shadow:var(--sh-1);-webkit-overflow-scrolling:touch;
}
table.compare-table{width:100%;min-width:820px;border-collapse:collapse;}
.compare-table caption{text-align:left;padding:18px 20px 0;font-size:13.5px;color:var(--c-text-2);}
.compare-table th,
.compare-table td{padding:16px 20px;text-align:left;font-size:15px;line-height:1.8;border-bottom:1px solid var(--c-border);vertical-align:top;}
.compare-table thead th{background:#F2F0FA;color:var(--c-primary-deep);font-weight:600;font-size:14.5px;white-space:nowrap;}
.compare-table tbody tr:nth-child(even){background:#FBFAFE;}
.compare-table tbody tr{transition:background-color .16s ease;}
.compare-table tbody tr:hover{background:#F6F4FF;}
.compare-table tbody tr:last-child td{border-bottom:0;}
.compare-table td:first-child{font-weight:600;color:var(--c-ink);}
.table-note{font-size:13.5px;color:var(--c-text-2);margin-top:16px;}

/* ---------- prepare ---------- */
.prepare-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:44px;align-items:center;}
.check-list{list-style:none;display:grid;gap:14px;margin-top:6px;}
.check-list li{
  display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--c-border);
  border-radius:12px;padding:16px 18px;transition:border-color .2s ease,box-shadow .2s ease;
}
.check-list li:hover{border-color:#D9D3F2;box-shadow:var(--sh-1);}
.check-list li::before{
  content:"";flex:0 0 auto;width:10px;height:10px;margin-top:9px;border-radius:50%;
  background:var(--c-accent2);box-shadow:0 0 0 4px rgba(18,184,166,.14);
}
.check-list strong{display:block;font-size:15.5px;font-weight:600;margin-bottom:2px;}
.check-list span{font-size:14.5px;color:var(--c-text-2);line-height:1.8;}
.figure{border:1px solid var(--c-border);border-radius:var(--r-img);overflow:hidden;background:#fff;box-shadow:var(--sh-1);}
.figure img{width:100%;border-radius:0;}
.figure figcaption{font-size:13px;color:var(--c-text-2);padding:11px 16px;border-top:1px solid var(--c-border);background:#FBFAFE;}

/* ---------- faq ---------- */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:46px;align-items:start;}
.faq-side .section-title{margin-bottom:12px;}
.faq-list{display:grid;gap:12px;}
.faq-item{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  overflow:hidden;transition:background-color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{box-shadow:var(--sh-1);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;padding:18px 20px;background:none;border:0;font-size:16px;font-weight:600;line-height:1.6;
  transition:color .18s ease;
}
.faq-q:hover{color:var(--c-primary);}
.faq-icon{
  flex:0 0 auto;width:24px;height:24px;border-radius:50%;border:1px solid var(--c-border);
  display:grid;place-items:center;font-size:15px;line-height:1;color:var(--c-primary);
  transition:transform .24s ease,background-color .24s ease;
}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a p{margin:0;padding:0 20px 20px;font-size:15.5px;color:var(--c-text-2);}
.faq-item.is-open{border-color:#D9D3F2;background:#FBFAFF;border-left:3px solid var(--c-primary);}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:#F1EEFF;}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--c-ink);color:#fff;border-radius:20px;
  padding:clamp(28px,4vw,52px);display:flex;flex-wrap:wrap;align-items:center;
  justify-content:space-between;gap:28px;
}
.cta-band::after{
  content:"";position:absolute;right:-70px;top:-70px;width:280px;height:280px;
  background:radial-gradient(circle,rgba(255,122,69,.35),rgba(255,122,69,0) 70%);
}
.cta-copy{position:relative;z-index:1;max-width:660px;}
.cta-copy h2{font-size:clamp(21px,2.5vw,28px);line-height:1.4;margin-bottom:12px;}
.cta-copy p{margin:0;font-size:15px;color:rgba(255,255,255,.76);line-height:1.85;}
.cta-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:12px;}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.34);}
.cta-band .btn-ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08);}

/* ---------- related ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.related-card{
  display:flex;flex-direction:column;gap:10px;background:#fff;border:1px solid var(--c-border);
  border-radius:var(--r-card);padding:24px 22px;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D9D3F2;}
.related-card h3{font-size:17px;font-weight:600;}
.related-card h3 a{color:var(--c-ink);}
.related-card h3 a:hover{color:var(--c-primary);}
.related-card p{margin:0;font-size:14.5px;color:var(--c-text-2);line-height:1.85;}
.badge{
  align-self:flex-start;display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;font-size:12.5px;font-weight:600;
  background:rgba(18,184,166,.12);color:#0E8C7E;
}
.badge-purple{background:rgba(75,46,209,.10);color:var(--c-primary);}

/* ---------- to top ---------- */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:70;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--c-border);box-shadow:var(--sh-2);color:var(--c-primary);
  display:grid;place-items:center;opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease,transform .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;}
.to-top:hover{transform:translateY(-2px);}

/* ---------- footer ---------- */
.site-footer{background:#fff;border-top:1px solid var(--c-border);padding:56px 0 28px;}
.foot-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1.2fr;gap:36px;}
.foot-brand{display:flex;align-items:center;gap:10px;font-size:15.5px;margin-bottom:14px;}
.foot-brand strong{font-weight:700;}
.foot-about,.foot-note{margin:0 0 10px;font-size:13.5px;line-height:1.85;color:var(--c-text-2);}
.site-footer h4{margin:0 0 14px;font-size:14px;font-weight:600;}
.foot-links{list-style:none;display:grid;gap:10px;font-size:14px;}
.foot-links a{color:var(--c-text-2);}
.foot-links a:hover{color:var(--c-primary);}
.foot-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--c-border);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--c-text-2);
}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .search-box input{width:160px;}
  .nav-link{padding:8px 10px;font-size:14px;}
}
@media (max-width:1080px){
  .quick-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .faq-layout{grid-template-columns:1fr;gap:28px;}
  .prepare-grid{grid-template-columns:1fr;gap:32px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:980px){
  .search-box{display:none;}
}
@media (max-width:900px){
  .header-inner{height:56px;gap:12px;}
  .brand-text{font-size:15px;}
  .nav-toggle{display:block;}
  .main-nav{
    position:fixed;top:56px;left:0;right:0;z-index:59;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--c-border);
    padding:6px 20px 18px;box-shadow:0 16px 30px rgba(20,18,31,.10);
    display:none;
  }
  .main-nav.is-open{display:flex;}
  .nav-link{padding:13px 6px;font-size:15px;border-bottom:1px solid var(--c-border);border-radius:0;}
  .nav-link:hover{background:transparent;}
  .nav-link.is-active::after{display:none;}
  .related-grid{grid-template-columns:1fr;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  body{font-size:16px;}
  .quick-grid{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .foot-grid{grid-template-columns:1fr;gap:26px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .hero-title{font-size:25px;}
  .hero-sub{font-size:15.5px;}
  .section{padding:44px 0;}
  .compare-table th,.compare-table td{padding:13px 14px;font-size:14px;}
  .btn{padding:11px 20px;font-size:14.5px;}
  .foot-bottom{flex-direction:column;gap:6px;}
  .to-top{right:14px;bottom:18px;}
}