/* roulang page: index */
/* ===== 设计变量 ===== */
:root{
  --c-brand:#2B6C9A;
  --c-brand-strong:#1E4F73;
  --c-brand-soft:#EAF3F8;
  --c-accent:#3C8C7A;
  --c-accent-soft:#E6F2EF;
  --c-warm:#C97B3D;
  --c-bg:#F7FAFC;
  --c-surface:#FFFFFF;
  --c-text:#14232E;
  --c-muted:#5E7181;
  --c-border:#DDE8EF;
  --c-error:#D65A4A;
  --c-success:#2E8B7A;
  --c-ink:#10303F;
  --r-nav:999px;
  --r-btn:10px;
  --r-card:16px;
  --r-img:12px;
  --r-lg:20px;
  --sh-sm:0 4px 12px rgba(18,35,52,.05);
  --sh-md:0 8px 24px rgba(18,35,52,.07);
  --sh-lg:0 16px 40px rgba(18,35,52,.10);
  --sp-section:104px;
  --font-cn:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--c-brand-strong);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--c-accent)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--c-brand);outline-offset:2px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.container-wide{max-width:1320px}
.section{padding:var(--sp-section) 0}
.section-tight{padding:72px 0}
.section-head{max-width:760px;margin:0 0 48px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--c-brand);background:var(--c-brand-soft);
  padding:6px 14px;border-radius:999px;margin-bottom:16px;
}
h1{font-size:clamp(32px,4vw,56px);line-height:1.15;font-weight:700;letter-spacing:-.01em}
h2{font-size:clamp(28px,3vw,36px);line-height:1.25;font-weight:700}
h3{font-size:clamp(20px,2vw,24px);line-height:1.4;font-weight:600}
h4{font-size:15px;line-height:1.5;font-weight:600}
.section-head p{margin-top:16px;color:var(--c-muted);font-size:17px}
.muted{color:var(--c-muted)}

/* ===== 悬浮胶囊导航 ===== */
.site-header{
  position:sticky;top:0;z-index:100;
  padding:16px 24px 0;
  transition:padding .25s ease;
}
.nav-shell{
  max-width:1180px;margin:0 auto;height:64px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:0 12px 0 20px;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--c-border);
  border-radius:var(--r-nav);
  box-shadow:var(--sh-sm);
  transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled .nav-shell{
  background:rgba(255,255,255,.96);
  box-shadow:var(--sh-md);
}
.brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--c-text);letter-spacing:.01em}
.brand:hover{color:var(--c-text)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--c-brand) 0%,var(--c-accent) 100%);
  display:flex;align-items:center;justify-content:center;color:#fff;
}
.brand-mark svg{width:20px;height:20px}
.brand-name small{display:block;font-size:11px;font-weight:500;color:var(--c-muted);letter-spacing:.08em;line-height:1.2}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  display:inline-block;padding:9px 16px;border-radius:999px;
  font-size:15px;font-weight:500;color:var(--c-muted);
  transition:background .2s ease,color .2s ease;
}
.nav-links a:hover{background:var(--c-brand-soft);color:var(--c-brand-strong)}
.nav-links a.active{background:var(--c-brand-soft);color:var(--c-brand-strong);font-weight:600}
.nav-cta{display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:999px;
  background:#fff;border:1px solid var(--c-border);
  align-items:center;justify-content:center;color:var(--c-text);
}
.nav-toggle svg{width:22px;height:22px}
.nav-drawer{
  display:none;position:absolute;left:24px;right:24px;top:88px;
  background:#fff;border:1px solid var(--c-border);border-radius:16px;
  box-shadow:var(--sh-lg);padding:16px;
}
.nav-drawer.open{display:block}
.nav-drawer a{display:block;padding:12px 14px;border-radius:10px;font-size:16px;color:var(--c-text);font-weight:500}
.nav-drawer a:hover{background:var(--c-brand-soft);color:var(--c-brand-strong)}
.nav-drawer .btn{width:100%;margin-top:10px;justify-content:center}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:transform .18s ease,background .2s ease,box-shadow .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--c-brand);color:#fff;box-shadow:0 6px 16px rgba(43,108,154,.22)}
.btn-primary:hover{background:var(--c-brand-strong);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(43,108,154,.26)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:#fff;color:var(--c-brand-strong);border-color:#BED6E4}
.btn-outline:hover{background:var(--c-brand-soft);color:var(--c-brand-strong)}
.btn-ghost{background:transparent;color:var(--c-brand-strong)}
.btn-ghost:hover{background:var(--c-brand-soft)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* ===== Hero ===== */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#F4F9FC 0%,#FFFFFF 100%);
  padding:72px 0 96px;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(43,108,154,.06) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(43,108,154,.06) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 78%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 78%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{margin-bottom:20px}
.hero h1 .hl{color:var(--c-brand);display:inline-block}
.hero-sub{font-size:19px;line-height:1.7;color:var(--c-muted);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:32px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  font-size:13px;font-weight:600;color:var(--c-brand-strong);
  background:#fff;border:1px solid var(--c-border);
  padding:7px 14px;border-radius:999px;box-shadow:var(--sh-sm);
}
.chip svg{width:15px;height:15px;color:var(--c-accent)}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-lg);box-shadow:var(--sh-lg);
}
.hero-float{
  position:absolute;left:-18px;bottom:24px;
  background:#fff;border:1px solid var(--c-border);border-radius:14px;
  box-shadow:var(--sh-lg);padding:16px 18px;min-width:196px;
}
.hero-float .num{font-size:26px;font-weight:700;color:var(--c-brand-strong);line-height:1.2}
.hero-float .lbl{font-size:13px;color:var(--c-muted)}
.hero-float .bar{height:6px;border-radius:999px;background:var(--c-brand-soft);margin-top:10px;overflow:hidden}
.hero-float .bar i{display:block;height:100%;width:82%;border-radius:999px;background:linear-gradient(90deg,var(--c-brand),var(--c-accent))}

/* ===== 服务 bento ===== */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.bento-item{
  background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-card);padding:28px;
  box-shadow:var(--sh-sm);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  display:flex;flex-direction:column;
}
.bento-item:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:#CFE1EC}
.bento-lg{grid-column:span 6;padding:0;overflow:hidden}
.bento-lg img{width:100%;height:232px;object-fit:cover}
.bento-lg .bento-body{padding:28px}
.bento-sm{grid-column:span 2}
.bento-3{grid-column:span 6}
.bento-6{grid-column:span 3}
.bento-icon{
  width:46px;height:46px;border-radius:12px;background:var(--c-brand-soft);
  display:flex;align-items:center;justify-content:center;color:var(--c-brand);margin-bottom:18px;
}
.bento-icon svg{width:24px;height:24px}
.bento-item h3{margin-bottom:10px}
.bento-item p{color:var(--c-muted);font-size:15px}
.bento-link{
  margin-top:18px;font-size:14px;font-weight:600;color:var(--c-brand);
  display:inline-flex;align-items:center;gap:6px;
}
.bento-link svg{width:16px;height:16px;transition:transform .2s ease}
.bento-link:hover svg{transform:translateX(3px)}
.bento-lg .bento-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:22px}
.bento-lg .mini{
  background:var(--c-bg);border:1px solid var(--c-border);border-radius:12px;padding:14px;
  font-size:13px;color:var(--c-muted);
}
.bento-lg .mini strong{display:block;color:var(--c-text);font-size:14px;margin-bottom:4px}

/* ===== 数据带 ===== */
.stats{background:var(--c-ink);color:#fff;padding:56px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{position:relative;padding-left:22px}
.stat::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;background:var(--c-accent)}
.stat .num{font-size:clamp(28px,3.2vw,40px);font-weight:700;line-height:1.15;color:#fff}
.stat .num span{font-size:18px;font-weight:600;color:var(--c-accent);margin-left:2px}
.stat .lbl{font-size:14px;color:#A9C0CC;margin-top:6px}

/* ===== 案例左右交替 ===== */
.case-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:72px}
.case-row:last-child{margin-bottom:0}
.case-row.reverse .case-media{order:2}
.case-media{position:relative}
.case-media img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--r-card);box-shadow:var(--sh-md)}
.case-media .tag-float{
  position:absolute;top:16px;left:16px;background:rgba(255,255,255,.94);
  border-radius:999px;padding:6px 14px;font-size:13px;font-weight:600;color:var(--c-brand-strong);
}
.case-body .badge{margin-bottom:14px}
.case-body h3{margin-bottom:12px}
.case-body p{color:var(--c-muted);margin-bottom:18px}
.case-list{display:grid;gap:10px;margin-bottom:22px}
.case-list li{display:flex;gap:10px;font-size:15px;color:#2C4352}
.case-list svg{width:18px;height:18px;flex:0 0 auto;color:var(--c-accent);margin-top:4px}
.badge{
  display:inline-flex;align-items:center;font-size:12px;font-weight:600;letter-spacing:.04em;
  color:var(--c-accent);background:var(--c-accent-soft);
  padding:5px 12px;border-radius:999px;
}
.badge-blue{color:var(--c-brand);background:var(--c-brand-soft)}

/* ===== 方案选项卡 ===== */
.plans{background:#fff;border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border)}
.plan-tabs{display:flex;gap:10px;flex-wrap:nowrap;overflow-x:auto;padding-bottom:6px;margin-bottom:32px}
.plan-tab{
  flex:0 0 auto;padding:11px 20px;border-radius:999px;border:1px solid var(--c-border);
  background:#fff;color:var(--c-muted);font-size:15px;font-weight:600;transition:all .2s ease;
}
.plan-tab:hover{border-color:#BED6E4;color:var(--c-brand-strong)}
.plan-tab.active{background:var(--c-brand);border-color:var(--c-brand);color:#fff;box-shadow:0 6px 16px rgba(43,108,154,.2)}
.plan-panel{display:none}
.plan-panel.active{display:block}
.plan-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start}
.steps{position:relative;padding-left:34px}
.steps::before{content:"";position:absolute;left:11px;top:8px;bottom:8px;width:2px;background:var(--c-border)}
.step{position:relative;padding-bottom:28px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:-29px;top:6px;width:14px;height:14px;border-radius:50%;
  background:#fff;border:3px solid var(--c-brand);
}
.step h4{font-size:17px;font-weight:600;margin-bottom:6px}
.step p{color:var(--c-muted);font-size:15px}
.plan-aside{
  background:var(--c-brand-soft);border:1px solid #D5E7F1;border-radius:var(--r-card);padding:26px;
}
.plan-aside h4{margin-bottom:14px;font-size:16px}
.plan-aside ul{display:grid;gap:12px}
.plan-aside li{
  display:flex;gap:10px;align-items:flex-start;
  background:#fff;border-radius:10px;padding:12px 14px;font-size:14px;
  border:1px solid #DCEBF4;
}
.plan-aside svg{width:17px;height:17px;color:var(--c-brand);flex:0 0 auto;margin-top:3px}

/* ===== 最新信息 ===== */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.news-head h2{margin-bottom:10px}
.news-head p{color:var(--c-muted);max-width:620px}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:#CFE1EC}
.news-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--c-brand-soft)}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.news-card:hover .thumb img{transform:scale(1.04)}
.news-body{padding:22px;display:flex;flex-direction:column;flex:1}
.news-body .badge{margin-bottom:12px;align-self:flex-start}
.news-body h3{font-size:18px;line-height:1.5;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body h3 a{color:var(--c-text)}
.news-body h3 a:hover{color:var(--c-brand)}
.news-body p{color:var(--c-muted);font-size:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:16px}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--c-muted);padding-top:14px;border-top:1px solid var(--c-border)}
.news-meta .more{font-weight:600;color:var(--c-brand)}
.empty-state{
  grid-column:1/-1;text-align:center;padding:64px 24px;background:#fff;
  border:1px dashed #C9DEEA;border-radius:var(--r-card);color:var(--c-muted);
}
.empty-state svg{width:40px;height:40px;color:#9FBECA;margin:0 auto 14px}
.empty-state p{margin-bottom:16px;font-size:15px}

/* ===== FAQ ===== */
.faq-wrap{display:grid;grid-template-columns:1fr 1fr;gap:0 48px}
.faq-item{border-bottom:1px solid var(--c-border)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;font-size:17px;font-weight:600;min-height:56px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus{
  width:26px;height:26px;flex:0 0 auto;border-radius:50%;background:var(--c-brand-soft);color:var(--c-brand);
  display:flex;align-items:center;justify-content:center;transition:transform .25s ease,background .25s ease;
}
.faq-item summary .plus svg{width:15px;height:15px}
.faq-item[open] summary .plus{transform:rotate(45deg);background:var(--c-brand);color:#fff}
.faq-item .answer{padding:0 0 22px;color:var(--c-muted);font-size:15px;max-width:560px}

/* ===== 联系 CTA ===== */
.cta-section{
  background:linear-gradient(135deg,#F2F8FC 0%,#EAF3F8 100%);
  border-top:1px solid var(--c-border);
}
.cta-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:32px;align-items:stretch}
.cta-info{
  background:var(--c-ink);color:#fff;border-radius:var(--r-lg);padding:40px;position:relative;overflow:hidden;
}
.cta-info::after{
  content:"";position:absolute;right:-60px;bottom:-60px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(60,140,122,.42) 0%,transparent 70%);
}
.cta-info h2{color:#fff;font-size:clamp(24px,2.6vw,32px);margin-bottom:14px}
.cta-info > p{color:#B7CBD5;margin-bottom:28px;font-size:15px}
.cta-facts{display:grid;gap:16px;position:relative;z-index:1}
.cta-facts li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:#DCE9EF}
.cta-facts svg{width:20px;height:20px;color:var(--c-accent);flex:0 0 auto;margin-top:2px}
.cta-form{background:#fff;border:1px solid var(--c-border);border-radius:var(--r-lg);padding:36px;box-shadow:var(--sh-md)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:14px;font-weight:600;color:#2C4352}
.field input,.field select,.field textarea{
  height:48px;border-radius:var(--r-btn);border:1px solid var(--c-border);
  background:#FBFDFE;padding:0 14px;font-size:15px;transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:110px;padding:12px 14px;resize:vertical;line-height:1.6}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-brand);box-shadow:0 0 0 3px rgba(43,108,154,.14);background:#fff;
}
.checkbox{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--c-muted);grid-column:1/-1}
.checkbox input{width:18px;height:18px;height:18px;margin-top:3px;accent-color:var(--c-brand)}
.form-note{grid-column:1/-1;font-size:13px;color:var(--c-muted)}
.form-note.ok{color:var(--c-success);font-weight:600}

/* ===== 页脚 ===== */
.site-footer{background:var(--c-ink);color:#B7CBD5;padding:64px 0 28px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:18px;font-weight:700;margin-bottom:16px}
.footer-brand .brand-mark{background:linear-gradient(140deg,var(--c-brand) 0%,var(--c-accent) 100%)}
.site-footer p{line-height:1.8}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:600}
.footer-links{display:grid;gap:10px}
.footer-links a{color:#B7CBD5}
.footer-links a:hover{color:#6FC3AC}
.footer-contact{display:grid;gap:10px}
.footer-contact li{display:flex;gap:9px;align-items:flex-start}
.footer-contact svg{width:17px;height:17px;color:var(--c-accent);flex:0 0 auto;margin-top:3px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:24px;font-size:13px;color:#8FA9B6;
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;color:#B7CBD5;background:transparent;
  border:1px solid rgba(255,255,255,.2);border-radius:999px;padding:8px 16px;font-size:13px;
  transition:all .2s ease;
}
.to-top:hover{border-color:#6FC3AC;color:#6FC3AC}
.to-top svg{width:15px;height:15px}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  .container,.container-wide{max-width:1040px}
  .bento-sm{grid-column:span 6}
  .bento-lg{grid-column:span 12}
  .news-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1023px){
  :root{--sp-section:72px}
  .nav-links,.nav-cta .btn{display:none}
  .nav-toggle{display:inline-flex}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero{padding:48px 0 64px}
  .hero-float{left:12px;bottom:12px}
  .bento-3,.bento-6{grid-column:span 6}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .case-row{grid-template-columns:1fr;gap:28px;margin-bottom:56px}
  .case-row.reverse .case-media{order:0}
  .plan-grid{grid-template-columns:1fr;gap:32px}
  .faq-wrap{grid-template-columns:1fr}
  .cta-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container,.container-wide{padding:0 18px}
  .site-header{padding:12px 18px 0}
  .nav-drawer{left:18px;right:18px;top:80px}
  .bento-3,.bento-6,.bento-sm{grid-column:span 12}
  .bento-lg .bento-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .news-head{flex-direction:column;align-items:flex-start}
  .form-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .cta-info,.cta-form{padding:26px}
}
@media (max-width:479px){
  body{font-size:15px}
  .hero-sub{font-size:16px}
  .hero::before{display:none}
  .stat .num{font-size:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: article */
:root{
  --c-brand:#2B6C9A;
  --c-brand-strong:#1E4F73;
  --c-brand-soft:#EAF3F8;
  --c-accent:#3C8C7A;
  --c-accent-soft:#E8F4F1;
  --c-warm:#C97B3D;
  --c-bg:#F7FAFC;
  --c-surface:#FFFFFF;
  --c-text:#14232E;
  --c-muted:#5E7181;
  --c-border:#DDE8EF;
  --c-error:#D65A4A;
  --c-success:#2E8B7A;
  --c-ink:#10303F;
  --r-nav:999px;
  --r-btn:10px;
  --r-card:16px;
  --r-img:12px;
  --r-input:10px;
  --sh-sm:0 4px 12px rgba(18,35,52,.05);
  --sh-md:0 8px 24px rgba(18,35,52,.07);
  --sh-lg:0 16px 40px rgba(18,35,52,.10);
  --sp-section:104px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
svg{flex:none}
:focus-visible{outline:2px solid var(--c-brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.container-wide{max-width:1320px}

/* 阅读进度 */
.read-progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--c-brand),var(--c-accent));z-index:200;transition:width .1s linear}

/* 悬浮胶囊导航 */
.site-header{position:sticky;top:0;z-index:90;padding:16px 0;transition:padding .3s var(--ease)}
.nav-shell{
  max-width:1180px;margin:0 auto;height:64px;display:flex;align-items:center;gap:16px;
  padding:0 12px 0 22px;background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--c-border);border-radius:var(--r-nav);box-shadow:var(--sh-sm);
  transition:box-shadow .3s var(--ease),background .3s var(--ease);
}
.site-header.is-scrolled .nav-shell{background:rgba(255,255,255,.96);box-shadow:var(--sh-md)}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:.2px;color:var(--c-brand-strong);white-space:nowrap}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:10px;background:var(--c-brand-soft);color:var(--c-brand)}
.brand-mark svg{width:20px;height:20px}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{padding:9px 16px;border-radius:var(--r-nav);font-size:15px;color:var(--c-muted);transition:background .22s var(--ease),color .22s var(--ease)}
.nav-links a:hover{background:var(--c-brand-soft);color:var(--c-brand-strong)}
.nav-links a.active{background:var(--c-brand-soft);color:var(--c-brand-strong);font-weight:600}
.nav-cta{display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 20px;border-radius:var(--r-nav);background:var(--c-brand);color:#fff;font-size:15px;font-weight:600;box-shadow:var(--sh-sm);transition:background .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease)}
.nav-cta:hover{background:var(--c-brand-strong);transform:translateY(-1px);box-shadow:var(--sh-md)}
.nav-cta:active{transform:translateY(0)}
.nav-cta svg{width:18px;height:18px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:var(--r-nav);align-items:center;justify-content:center;color:var(--c-brand-strong);background:var(--c-brand-soft)}
.nav-toggle svg{width:22px;height:22px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease)}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--c-brand);color:#fff;box-shadow:var(--sh-sm)}
.btn-primary:hover{background:var(--c-brand-strong);transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--c-brand-strong);border-color:var(--c-border)}
.btn-ghost:hover{background:var(--c-brand-soft);border-color:var(--c-brand-soft)}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}
.btn-sm{height:42px;padding:0 18px;font-size:14px}

/* 面包屑 */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);padding:28px 0 0}
.breadcrumb a{color:var(--c-muted);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--c-brand-strong)}
.breadcrumb .sep{color:#B7C7D3}
.breadcrumb .current{color:var(--c-brand-strong);font-weight:600;max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 文章头部 */
.article-hero{padding:26px 0 0;max-width:900px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
.tag{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--r-nav);font-size:12.5px;font-weight:600;letter-spacing:.2px}
.tag-brand{background:var(--c-brand-soft);color:var(--c-brand-strong)}
.tag-accent{background:var(--c-accent-soft);color:var(--c-accent)}
.tag-warm{background:#FBF1E7;color:var(--c-warm)}
.article-hero h1{font-size:clamp(28px,3.6vw,42px);line-height:1.25;font-weight:700;letter-spacing:-.4px;color:var(--c-text)}
.article-meta{display:flex;flex-wrap:wrap;gap:10px 24px;margin-top:20px;font-size:14px;color:var(--c-muted)}
.article-meta span{display:inline-flex;align-items:center;gap:8px}
.article-meta svg{width:17px;height:17px;color:var(--c-brand)}
.article-lead{margin-top:22px;padding:20px 22px;background:var(--c-surface);border:1px solid var(--c-border);border-left:3px solid var(--c-brand);border-radius:0 var(--r-card) var(--r-card) 0;color:var(--c-muted);font-size:15.5px}
.article-cover{margin-top:28px;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-md);border:1px solid var(--c-border)}
.article-cover img{width:100%;aspect-ratio:16/7;object-fit:cover}

/* 8:4 布局 */
.article-grid{display:grid;grid-template-columns:minmax(0,8fr) minmax(280px,4fr);gap:44px;align-items:start;padding:52px 0 0}
.article-grid--single{grid-template-columns:minmax(0,1fr);max-width:860px}

/* 正文排版 */
.article-body{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);padding:40px 44px;box-shadow:var(--sh-sm);max-width:820px;font-size:16.5px;line-height:1.85;color:#22323F}
.article-body > * + *{margin-top:18px}
.article-body p{color:#2C3E4C}
.article-body h2{position:relative;margin-top:40px;padding-left:16px;font-size:clamp(21px,2.2vw,26px);line-height:1.4;font-weight:700;color:var(--c-text)}
.article-body h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;background:linear-gradient(180deg,var(--c-brand),var(--c-accent))}
.article-body h3{margin-top:28px;font-size:19px;font-weight:700;color:var(--c-text)}
.article-body h4{margin-top:22px;font-size:16.5px;font-weight:600;color:var(--c-brand-strong)}
.article-body a{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--c-brand-strong)}
.article-body ul,.article-body ol{padding-left:22px}
.article-body ul{list-style:none}
.article-body ul li{position:relative;padding-left:18px;margin-top:10px;color:#2C3E4C}
.article-body ul li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;background:var(--c-accent)}
.article-body ol{list-style:decimal}
.article-body ol li{margin-top:10px;padding-left:4px}
.article-body blockquote{margin:24px 0;padding:18px 22px;background:var(--c-brand-soft);border-left:3px solid var(--c-brand);border-radius:0 var(--r-img) var(--r-img) 0;color:var(--c-brand-strong)}
.article-body img{border-radius:var(--r-img);margin:24px 0}
.article-body figure{margin:24px 0}
.article-body figcaption{margin-top:8px;font-size:13.5px;color:var(--c-muted);text-align:center}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;border:1px solid var(--c-border);border-radius:var(--r-img);overflow:hidden}
.article-body th{background:var(--c-brand-soft);color:var(--c-brand-strong);font-weight:600;text-align:left}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--c-border)}
.article-body tbody tr:last-child td{border-bottom:0}
.article-body code{padding:2px 7px;border-radius:6px;background:#F1F6FA;color:var(--c-brand-strong);font-size:14.5px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.article-body pre{padding:18px 20px;border-radius:var(--r-img);background:#F1F6FA;border:1px solid var(--c-border);overflow-x:auto;font-size:14.5px;line-height:1.7}
.article-body pre code{padding:0;background:none}
.article-body hr{margin:32px 0;border:0;border-top:1px solid var(--c-border)}

/* 空态 */
.empty-state{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);padding:56px 28px;text-align:center;box-shadow:var(--sh-sm)}
.empty-state svg{width:44px;height:44px;color:#9FB6C6;margin:0 auto 14px}
.empty-state h3{font-size:19px;font-weight:700;color:var(--c-text)}
.empty-state p{margin-top:8px;color:var(--c-muted);font-size:15px}
.empty-state .btn{margin-top:22px}

/* 侧栏 */
.article-aside{position:sticky;top:100px;display:flex;flex-direction:column;gap:20px}
.aside-card{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);padding:22px 22px 24px;box-shadow:var(--sh-sm)}
.aside-card h3{font-size:15.5px;font-weight:700;color:var(--c-text);display:flex;align-items:center;gap:8px}
.aside-card h3 svg{width:18px;height:18px;color:var(--c-brand)}
.aside-meta{margin-top:16px;display:flex;flex-direction:column;gap:12px;font-size:14px;color:var(--c-muted)}
.aside-meta li{display:flex;align-items:flex-start;gap:10px}
.aside-meta strong{color:var(--c-text);font-weight:600}
.aside-list{margin-top:14px;display:flex;flex-direction:column}
.aside-list a{display:block;padding:12px 0;border-top:1px solid var(--c-border);transition:transform .2s var(--ease)}
.aside-list a:first-child{border-top:0;padding-top:6px}
.aside-list a:hover{transform:translateX(3px)}
.aside-list .t{font-size:14.5px;font-weight:600;color:var(--c-text);line-height:1.5}
.aside-list a:hover .t{color:var(--c-brand-strong)}
.aside-list .d{margin-top:3px;font-size:12.5px;color:var(--c-muted)}
.aside-cta{background:linear-gradient(150deg,var(--c-brand-strong),var(--c-brand));color:#fff;border:0}
.aside-cta h3{color:#fff}
.aside-cta p{margin-top:10px;font-size:14px;color:rgba(255,255,255,.86)}
.aside-cta .btn{margin-top:18px;width:100%;background:#fff;color:var(--c-brand-strong)}
.aside-cta .btn:hover{background:var(--c-brand-soft)}

/* 文章底部 */
.article-foot{margin-top:32px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-sm);max-width:820px}
.article-foot .back-home{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:600;color:var(--c-brand-strong)}
.article-foot .back-home svg{width:18px;height:18px}
.article-foot .back-home:hover{color:var(--c-accent)}
.article-foot .note{font-size:13.5px;color:var(--c-muted)}

/* 相关推荐 */
.related{padding:88px 0 0}
.section-head{max-width:640px;margin-bottom:36px}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:1px;color:var(--c-accent);text-transform:uppercase}
.section-head .eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--c-accent)}
.section-head h2{margin-top:12px;font-size:clamp(24px,2.8vw,32px);line-height:1.3;font-weight:700;color:var(--c-text)}
.section-head p{margin-top:12px;color:var(--c-muted);font-size:15.5px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-sm);transition:transform .28s var(--ease),box-shadow .28s var(--ease)}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg)}
.post-card figure{margin:0;overflow:hidden}
.post-card figure img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s var(--ease)}
.post-card:hover figure img{transform:scale(1.04)}
.post-card .body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1}
.post-card .body h3{margin-top:14px;font-size:17px;line-height:1.5;font-weight:700;color:var(--c-text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card:hover .body h3{color:var(--c-brand-strong)}
.post-card .body p{margin-top:10px;font-size:14.5px;color:var(--c-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card .foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--c-muted)}
.post-card .more{font-weight:600;color:var(--c-brand-strong)}

/* CTA 带 */
.cta-band{margin-top:92px;background:linear-gradient(135deg,#10303F,#1E4F73);border-radius:24px;padding:52px 48px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;color:#fff;box-shadow:var(--sh-lg)}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.35}
.cta-band p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.82);max-width:560px}
.cta-band .actions{display:flex;flex-wrap:wrap;gap:14px}
.cta-band .btn-primary{background:#fff;color:var(--c-brand-strong)}
.cta-band .btn-primary:hover{background:var(--c-brand-soft)}
.cta-band .btn-ghost{color:#fff;border-color:rgba(255,255,255,.36)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.5)}

/* 页脚 */
.site-footer{margin-top:104px;background:var(--c-ink);color:#C3D3DC;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.1);color:#8FC6E4}
.site-footer p{font-size:14px;line-height:1.8;color:#9FB4BF}
.site-footer h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.4px}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:#9FB4BF;transition:color .22s var(--ease)}
.footer-links a:hover{color:#6FC0AC}
.footer-contact{display:flex;flex-direction:column;gap:13px}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:#9FB4BF}
.footer-contact svg{width:18px;height:18px;color:#6FA9CB;margin-top:3px}
.footer-bottom{margin-top:46px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;font-size:13.5px;color:#8FA6B2}
.to-top{display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:var(--r-nav);background:rgba(255,255,255,.08);color:#D6E4EC;font-size:13.5px;transition:background .22s var(--ease),color .22s var(--ease)}
.to-top:hover{background:rgba(255,255,255,.16);color:#fff}
.to-top svg{width:16px;height:16px}

/* 响应式 */
@media (max-width:1279px){
  .container{max-width:1040px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1023px){
  :root{--sp-section:76px}
  .nav-links{position:absolute;top:76px;left:24px;right:24px;flex-direction:column;align-items:stretch;gap:4px;padding:14px;background:#fff;border:1px solid var(--c-border);border-radius:20px;box-shadow:var(--sh-lg);display:none}
  .nav-links.is-open{display:flex}
  .nav-links a{padding:12px 16px;font-size:15.5px}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .nav-cta{display:none}
  .nav-shell{padding:0 12px 0 18px}
  .article-grid{grid-template-columns:minmax(0,1fr);gap:32px;padding-top:40px}
  .article-aside{position:static}
  .article-body{padding:32px 28px;max-width:none}
  .article-cover img{aspect-ratio:16/9}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{padding:40px 30px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .article-hero{padding-top:20px}
  .article-meta{gap:8px 18px;font-size:13.5px}
  .article-body{padding:26px 20px;font-size:16px}
  .article-body h2{margin-top:32px}
  .related{padding-top:64px}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .cta-band{margin-top:68px;border-radius:18px}
  .site-footer{margin-top:76px;padding:52px 0 24px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .btn{width:100%}
  .article-foot{flex-direction:column;align-items:flex-start}
  .article-foot .btn{width:auto}
}
@media (max-width:479px){
  body{font-size:15.5px}
  .article-hero h1{font-size:25px}
  .breadcrumb .current{max-width:200px}
  .cta-band{padding:32px 20px}
}

/* roulang page: category1 */
:root{
  --c-brand:#2B6C9A;
  --c-brand-strong:#1E4F73;
  --c-brand-soft:#EAF3F8;
  --c-accent:#3C8C7A;
  --c-accent-soft:#E6F3EF;
  --c-warm:#C97B3D;
  --c-bg:#F7FAFC;
  --c-surface:#FFFFFF;
  --c-text:#14232E;
  --c-muted:#5E7181;
  --c-border:#DDE8EF;
  --c-dark:#0E2733;
  --c-dark-2:#123243;
  --c-error:#D65A4A;
  --c-success:#2E8B7A;
  --r-pill:999px;
  --r-btn:10px;
  --r-card:16px;
  --r-img:12px;
  --sh-sm:0 4px 12px rgba(18,35,52,.05);
  --sh-md:0 8px 24px rgba(18,35,52,.07);
  --sh-lg:0 16px 40px rgba(18,35,52,.10);
  --container:1200px;
  --container-wide:1320px;
  --gap:24px;
  --sec:104px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:none;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{font-weight:600;line-height:1.3;}
:focus-visible{outline:2px solid var(--c-brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.container-wide{width:100%;max-width:var(--container-wide);margin:0 auto;padding:0 24px;}
.section{padding:var(--sec) 0;}
.section-tight{padding:64px 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--c-brand-strong);background:var(--c-brand-soft);
  padding:6px 14px;border-radius:var(--r-pill);
}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{font-size:clamp(28px,3vw,36px);line-height:1.25;margin:16px 0 12px;letter-spacing:-.01em;}
.section-head p{color:var(--c-muted);font-size:16px;}

/* ---------- header / nav ---------- */
.site-header{position:sticky;top:16px;z-index:80;padding:0 24px;}
.nav-shell{
  max-width:1180px;margin:0 auto;height:64px;
  display:flex;align-items:center;gap:20px;
  padding:0 12px 0 20px;
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border:1px solid var(--c-border);
  border-radius:var(--r-pill);
  box-shadow:var(--sh-sm);
  transition:background .3s ease,box-shadow .3s ease;
}
.site-header.is-scrolled .nav-shell{background:rgba(255,255,255,.96);box-shadow:var(--sh-md);}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--c-brand-strong);white-space:nowrap;}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;
  border-radius:10px;color:#fff;
  background:linear-gradient(150deg,var(--c-brand) 0%,var(--c-brand-strong) 100%);
}
.brand-mark svg{width:20px;height:20px;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-links a{
  display:inline-flex;align-items:center;height:40px;padding:0 16px;
  font-size:15px;color:var(--c-muted);border-radius:var(--r-pill);
  transition:background .2s ease,color .2s ease;
}
.nav-links a:hover{background:var(--c-brand-soft);color:var(--c-brand-strong);}
.nav-links a.active{background:var(--c-brand-soft);color:var(--c-brand-strong);font-weight:600;}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 20px;
  font-size:15px;font-weight:600;color:#fff;border-radius:var(--r-pill);
  background:var(--c-brand);box-shadow:var(--sh-sm);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.nav-cta:hover{background:var(--c-brand-strong);transform:translateY(-1px);box-shadow:var(--sh-md);}
.nav-cta:active{transform:translateY(0);}
.nav-toggle{
  display:none;width:44px;height:44px;margin-left:auto;
  border:1px solid var(--c-border);border-radius:14px;background:#fff;
  align-items:center;justify-content:center;color:var(--c-brand-strong);
}
.nav-toggle svg{width:22px;height:22px;}
.nav-drawer{
  display:none;max-width:1180px;margin:10px auto 0;
  background:#fff;border:1px solid var(--c-border);border-radius:20px;
  box-shadow:var(--sh-lg);padding:14px;
}
.nav-drawer.is-open{display:block;}
.nav-drawer a{
  display:block;padding:13px 16px;border-radius:12px;font-size:15px;color:var(--c-muted);
}
.nav-drawer a:hover,.nav-drawer a.active{background:var(--c-brand-soft);color:var(--c-brand-strong);font-weight:600;}
.nav-drawer .drawer-cta{
  margin-top:8px;text-align:center;color:#fff;background:var(--c-brand);font-weight:600;
}

/* ---------- hero banner ---------- */
.hero-banner{
  position:relative;margin-top:24px;border-radius:24px;overflow:hidden;
  min-height:360px;display:flex;align-items:center;
  background:#0E2733 url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  box-shadow:var(--sh-lg);
}
.hero-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(14,39,51,.92) 0%,rgba(14,39,51,.78) 46%,rgba(14,39,51,.36) 100%);
}
.hero-inner{position:relative;z-index:2;padding:56px 56px 52px;max-width:760px;color:#EAF3F8;}
.hero-inner .eyebrow{background:rgba(255,255,255,.12);color:#CDE6F4;}
.hero-inner h1{
  font-size:clamp(30px,3.4vw,50px);line-height:1.15;letter-spacing:-.015em;
  margin:18px 0 16px;color:#fff;font-weight:700;
}
.hero-inner p{font-size:17px;line-height:1.8;color:#B9D2E0;max-width:620px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.breadcrumb{
  font-size:13px;color:var(--c-muted);display:flex;align-items:center;gap:8px;
  padding:20px 0 0;
}
.breadcrumb a:hover{color:var(--c-brand);}
.breadcrumb .sep{color:#B7C7D3;}
.breadcrumb .current{color:var(--c-brand-strong);font-weight:600;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:50px;padding:0 26px;font-size:16px;font-weight:600;
  border-radius:var(--r-btn);border:1px solid transparent;
  transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn svg{width:18px;height:18px;}
.btn-primary{background:var(--c-brand);color:#fff;box-shadow:var(--sh-sm);}
.btn-primary:hover{background:var(--c-brand-strong);transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:rgba(255,255,255,.08);color:#EAF3F8;border-color:rgba(255,255,255,.34);}
.btn-ghost:hover{background:rgba(255,255,255,.16);transform:translateY(-1px);}
.btn-outline{background:#fff;color:var(--c-brand-strong);border-color:var(--c-border);}
.btn-outline:hover{background:var(--c-brand-soft);border-color:#C4DCEA;transform:translateY(-1px);}
.btn-block{width:100%;}
.btn[disabled]{opacity:.5;pointer-events:none;}

/* ---------- anchor layout ---------- */
.anchor-layout{display:grid;grid-template-columns:262px minmax(0,1fr);gap:48px;align-items:start;}
.anchor-nav{position:sticky;top:104px;}
.anchor-title{font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--c-muted);margin-bottom:14px;}
.anchor-nav ul{display:flex;flex-direction:column;gap:2px;border-left:2px solid var(--c-border);}
.anchor-nav a{
  display:block;padding:10px 14px;font-size:15px;color:var(--c-muted);
  border-left:2px solid transparent;margin-left:-2px;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.anchor-nav a:hover{color:var(--c-brand-strong);}
.anchor-nav a.active{color:var(--c-brand-strong);font-weight:600;border-left-color:var(--c-brand);background:linear-gradient(90deg,var(--c-brand-soft),rgba(234,243,248,0));}
.anchor-card{
  margin-top:24px;padding:22px;background:var(--c-surface);
  border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-sm);
}
.anchor-card h4{font-size:15px;margin-bottom:8px;}
.anchor-card p{font-size:13px;color:var(--c-muted);line-height:1.7;margin-bottom:14px;}
.anchor-card .btn{height:44px;font-size:14px;padding:0 18px;}

/* ---------- content flow ---------- */
.content-flow{display:flex;flex-direction:column;gap:64px;}
.flow-block h2{
  font-size:clamp(24px,2.4vw,30px);line-height:1.35;margin-bottom:14px;
  padding-left:16px;border-left:4px solid var(--c-brand);letter-spacing:-.01em;
}
.flow-block > p.lead{color:var(--c-muted);margin-bottom:28px;max-width:760px;}
.flow-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gap);}
.flow-card{
  background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-card);box-shadow:var(--sh-sm);overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.flow-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:#CFE2EE;}
.flow-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--c-brand-soft);}
.flow-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.flow-card:hover .thumb img{transform:scale(1.04);}
.flow-card .body{padding:24px;}
.flow-card h3{font-size:19px;margin-bottom:10px;}
.flow-card p{font-size:15px;color:var(--c-muted);}
.flow-card .meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;padding:4px 11px;border-radius:var(--r-pill);
  background:var(--c-brand-soft);color:var(--c-brand-strong);
}
.badge-accent{background:var(--c-accent-soft);color:#2A6A5C;}
.badge-warm{background:#FBEDE1;color:#A25E27;}

.list-checks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 28px;margin-top:8px;}
.list-checks li{display:flex;gap:12px;font-size:15px;color:var(--c-muted);line-height:1.7;}
.list-checks .ic{
  flex:0 0 26px;width:26px;height:26px;border-radius:8px;
  display:grid;place-items:center;background:var(--c-accent-soft);color:#2A6A5C;margin-top:2px;
}
.list-checks .ic svg{width:16px;height:16px;}
.list-checks strong{display:block;color:var(--c-text);font-size:15px;font-weight:600;margin-bottom:2px;}

/* scenario cards */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.scene-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);
  transition:transform .25s ease,box-shadow .25s ease;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);}
.scene-card .ic-lg{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:var(--c-brand-soft);color:var(--c-brand-strong);margin-bottom:16px;
}
.scene-card .ic-lg svg{width:22px;height:22px;}
.scene-card h3{font-size:17px;margin-bottom:8px;}
.scene-card p{font-size:14px;color:var(--c-muted);}

/* timeline */
.timeline{position:relative;margin-top:8px;padding-left:0;}
.timeline li{
  position:relative;display:grid;grid-template-columns:56px minmax(0,1fr);
  gap:20px;padding-bottom:32px;
}
.timeline li:last-child{padding-bottom:0;}
.timeline li::before{
  content:"";position:absolute;left:27px;top:56px;bottom:0;width:2px;
  background:linear-gradient(180deg,var(--c-border),rgba(221,232,239,.2));
}
.timeline li:last-child::before{display:none;}
.timeline .step-no{
  width:56px;height:56px;border-radius:16px;display:grid;place-items:center;
  font-weight:700;font-size:17px;color:var(--c-brand-strong);
  background:var(--c-brand-soft);border:1px solid #D5E7F2;
}
.timeline h3{font-size:18px;margin:14px 0 8px;}
.timeline p{font-size:15px;color:var(--c-muted);max-width:680px;}

/* dark stats band */
.dark-panel{
  position:relative;background:var(--c-dark);color:#E8F1F6;border-radius:24px;
  overflow:hidden;padding:48px 44px;
}
.dark-panel::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:52px 52px;
}
.dark-panel > *{position:relative;z-index:2;}
.dark-panel h2{font-size:clamp(24px,2.4vw,30px);color:#fff;border-left-color:var(--c-accent);padding-left:16px;border-left:4px solid var(--c-accent);margin-bottom:12px;}
.dark-panel p.lead{color:#A9C4D2;margin-bottom:32px;max-width:720px;}
.stat-band{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}
.stat-item{border-left:1px solid rgba(255,255,255,.14);padding-left:20px;}
.stat-item:first-child{border-left:none;padding-left:0;}
.stat-item .num{font-size:clamp(26px,2.6vw,34px);font-weight:700;color:#fff;letter-spacing:-.02em;}
.stat-item .num span{font-size:15px;font-weight:600;color:var(--c-accent);margin-left:2px;}
.stat-item .lbl{font-size:14px;color:#9CB8C7;margin-top:6px;}

/* faq */
.faq-list{border-top:1px solid var(--c-border);}
.faq-item{border-bottom:1px solid var(--c-border);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 4px;text-align:left;font-size:17px;font-weight:600;color:var(--c-text);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--c-brand-strong);}
.faq-q .plus{
  flex:0 0 28px;width:28px;height:28px;border-radius:50%;
  display:grid;place-items:center;background:var(--c-brand-soft);color:var(--c-brand-strong);
  transition:transform .28s ease,background .2s ease;
}
.faq-q .plus svg{width:16px;height:16px;}
.faq-item.is-open .faq-q .plus{transform:rotate(45deg);background:var(--c-brand);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s ease;}
.faq-a p{padding:0 4px 22px;font-size:15px;color:var(--c-muted);max-width:760px;}

/* cta + form */
.cta-panel{
  position:relative;overflow:hidden;border-radius:24px;background:var(--c-dark-2);
  color:#E8F1F6;padding:52px 48px;
}
.cta-panel::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(720px 320px at 88% 12%,rgba(60,140,122,.32),transparent 62%),
             linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:auto,52px 52px;
}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:start;}
.cta-grid h2{font-size:clamp(24px,2.6vw,32px);color:#fff;margin-bottom:14px;line-height:1.3;}
.cta-grid > div > p{color:#A9C4D2;font-size:15px;max-width:460px;}
.cta-points{margin-top:26px;display:flex;flex-direction:column;gap:14px;}
.cta-points li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:#C7DDE9;}
.cta-points .ic{flex:0 0 24px;width:24px;height:24px;border-radius:8px;display:grid;place-items:center;background:rgba(60,140,122,.28);color:#8FD4C3;margin-top:2px;}
.cta-points .ic svg{width:15px;height:15px;}
.form-card{background:#fff;border-radius:20px;padding:28px;box-shadow:var(--sh-lg);color:var(--c-text);}
.form-card h3{font-size:19px;margin-bottom:6px;}
.form-card .hint{font-size:13px;color:var(--c-muted);margin-bottom:20px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;font-weight:600;color:var(--c-text);margin-bottom:7px;}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;font-size:15px;
  background:#FBFDFE;border:1px solid var(--c-border);border-radius:var(--r-btn);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{height:104px;padding:12px 14px;resize:vertical;line-height:1.6;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;background:#fff;border-color:var(--c-brand);box-shadow:0 0 0 3px rgba(43,108,154,.14);
}
.field input:invalid:not(:placeholder-shown){border-color:var(--c-error);}
.check-row{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--c-muted);margin:4px 0 18px;}
.check-row input{width:16px;height:16px;height:16px;margin-top:3px;accent-color:var(--c-brand);}
.form-note{font-size:12.5px;color:var(--c-muted);margin-top:12px;}
.form-note.ok{color:var(--c-success);font-weight:600;}
.form-note.err{color:var(--c-error);font-weight:600;}

/* footer */
.site-footer{background:#10303F;color:#BBD2DE;margin-top:96px;padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.4fr .9fr .9fr 1.1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff;margin-bottom:16px;}
.footer-brand .brand-mark{background:linear-gradient(150deg,#3C8C7A 0%,#2B6C9A 100%);}
.site-footer p{font-size:14px;line-height:1.8;color:#9CB8C7;max-width:360px;}
.site-footer h4{font-size:14px;font-weight:600;color:#fff;letter-spacing:.04em;margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:#9CB8C7;transition:color .2s ease;}
.footer-links a:hover{color:#8FD4C3;}
.footer-contact{display:flex;flex-direction:column;gap:12px;}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:#9CB8C7;}
.footer-contact svg{width:17px;height:17px;flex:0 0 17px;margin-top:4px;color:#6FA3BE;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;color:#88A5B3;
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 18px;
  font-size:13px;font-weight:600;color:#DDEBF3;
  border:1px solid rgba(255,255,255,.2);border-radius:var(--r-pill);
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.to-top svg{width:16px;height:16px;}
.to-top:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.36);transform:translateY(-1px);}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container,.container-wide{max-width:1040px;}
  :root{--sec:88px;}
}
@media (max-width:1023px){
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:flex;}
  .anchor-layout{grid-template-columns:minmax(0,1fr);gap:32px;}
  .anchor-nav{position:sticky;top:92px;z-index:40;background:rgba(247,250,252,.94);
    backdrop-filter:blur(8px);padding:10px 0;}
  .anchor-nav ul{flex-direction:row;overflow-x:auto;border-left:none;gap:8px;padding-bottom:4px;}
  .anchor-nav a{white-space:nowrap;border-left:none;border:1px solid var(--c-border);
    border-radius:var(--r-pill);background:#fff;padding:8px 16px;font-size:14px;}
  .anchor-nav a.active{background:var(--c-brand-soft);border-color:#C9E0EE;}
  .anchor-card{display:none;}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat-band{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 24px;}
  .stat-item:nth-child(3){border-left:none;padding-left:0;}
  .cta-grid{grid-template-columns:minmax(0,1fr);gap:32px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .hero-inner{padding:44px 36px;}
}
@media (max-width:767px){
  :root{--sec:60px;}
  .site-header{padding:0 16px;top:12px;}
  .container,.container-wide{padding:0 18px;}
  .flow-grid,.list-checks,.scene-grid{grid-template-columns:minmax(0,1fr);}
  .hero-banner{border-radius:20px;min-height:0;margin-top:16px;}
  .hero-inner{padding:36px 24px 34px;}
  .hero-inner p{font-size:15.5px;}
  .hero-actions .btn{width:100%;}
  .dark-panel{padding:34px 24px;border-radius:20px;}
  .cta-panel{padding:34px 24px;border-radius:20px;}
  .form-card{padding:22px;}
  .timeline li{grid-template-columns:44px minmax(0,1fr);gap:16px;}
  .timeline .step-no{width:44px;height:44px;border-radius:12px;font-size:15px;}
  .timeline li::before{left:21px;top:44px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:479px){
  body{font-size:15px;}
  .brand{font-size:16px;}
  .flow-block h2{font-size:22px;}
  .stat-band{grid-template-columns:minmax(0,1fr);gap:22px;}
  .stat-item{border-left:none;padding-left:0;border-top:1px solid rgba(255,255,255,.14);padding-top:16px;}
  .stat-item:first-child{border-top:none;padding-top:0;}
  .dark-panel::before,.cta-panel::before{display:none;}
  .faq-q{font-size:16px;}
}

/* roulang page: category2 */
:root{
  --c-brand:#2B6C9A;
  --c-brand-strong:#1E4F73;
  --c-brand-soft:#EAF3F8;
  --c-accent:#3C8C7A;
  --c-accent-soft:#E6F2EE;
  --c-warm:#C97B3D;
  --c-bg:#F7FAFC;
  --c-surface:#FFFFFF;
  --c-text:#14232E;
  --c-muted:#5E7181;
  --c-border:#DDE8EF;
  --c-ink:#10303F;
  --c-ink-soft:#1B4457;
  --c-error:#D65A4A;
  --c-success:#2E8B7A;
  --r-btn:10px;
  --r-card:16px;
  --r-img:12px;
  --r-pill:999px;
  --sh-sm:0 4px 12px rgba(18,35,52,.05);
  --sh-md:0 8px 24px rgba(18,35,52,.07);
  --sh-lg:0 16px 40px rgba(18,35,52,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button{font:inherit;color:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.2px}
p{margin:0}
ul,ol,dl,dd{margin:0;padding:0;list-style:none}
svg{flex-shrink:0}
:focus-visible{outline:2px solid var(--c-brand);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.container-wide{max-width:1320px}

/* ---------- 悬浮胶囊导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  padding:16px 0 0;
}
.nav-shell{
  position:relative;
  width:100%;
  max-width:1180px;
  margin:0 auto;
  min-height:64px;
  display:flex;
  align-items:center;
  gap:20px;
  padding:8px 12px 8px 20px;
  background:rgba(255,255,255,.86);
  border:1px solid var(--c-border);
  border-radius:var(--r-pill);
  box-shadow:var(--sh-sm);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
  margin-left:24px;
  margin-right:24px;
}
.site-header.is-scrolled .nav-shell{
  background:rgba(255,255,255,.96);
  box-shadow:var(--sh-md);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  font-weight:700;
  color:var(--c-brand-strong);
  white-space:nowrap;
}
.brand-mark{
  width:34px;height:34px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:11px;
  background:var(--c-brand-soft);
  color:var(--c-brand);
}
.brand-mark svg{width:20px;height:20px}
.nav-links{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
  font-size:15px;
}
.nav-links a{
  display:inline-block;
  padding:9px 16px;
  border-radius:var(--r-pill);
  color:var(--c-muted);
  font-weight:500;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-links a:hover{background:var(--c-brand-soft);color:var(--c-brand-strong)}
.nav-links a.active{
  background:var(--c-brand-soft);
  color:var(--c-brand-strong);
  font-weight:600;
}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  align-items:center;justify-content:center;
  border:1px solid var(--c-border);
  background:var(--c-surface);
  border-radius:12px;
  color:var(--c-brand-strong);
}
.nav-toggle svg{width:20px;height:20px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  transition:transform .18s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--c-brand);color:#fff;box-shadow:0 6px 16px rgba(43,108,154,.20)}
.btn-primary:hover{background:var(--c-brand-strong);transform:translateY(-1px);box-shadow:0 10px 22px rgba(30,79,115,.24)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 10px rgba(30,79,115,.20)}
.btn-outline{background:var(--c-surface);color:var(--c-brand-strong);border-color:var(--c-brand)}
.btn-outline:hover{background:var(--c-brand-soft);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--c-brand-strong)}
.btn-ghost:hover{background:rgba(255,255,255,.16)}
.btn-light{background:#fff;color:var(--c-brand-strong)}
.btn-light:hover{background:var(--c-brand-soft);transform:translateY(-1px)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{max-width:720px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  background:var(--c-brand-soft);
  color:var(--c-brand-strong);
  font-size:13px;
  font-weight:600;
  letter-spacing:.4px;
  margin-bottom:16px;
}
.eyebrow.accent{background:var(--c-accent-soft);color:var(--c-accent)}
h2.section-title{font-size:clamp(28px,3vw,36px);line-height:1.25;font-weight:700}
.section-sub{margin-top:14px;color:var(--c-muted);font-size:16px}
.badge{
  display:inline-flex;align-items:center;
  padding:4px 12px;
  border-radius:var(--r-pill);
  font-size:12.5px;
  font-weight:600;
  background:var(--c-brand-soft);
  color:var(--c-brand-strong);
}
.badge.accent{background:var(--c-accent-soft);color:var(--c-accent)}
.badge.warm{background:#FBEFE3;color:var(--c-warm)}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding:64px 0 88px;
  background:linear-gradient(180deg,#F4F9FC 0%,#FFFFFF 100%);
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(43,108,154,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(43,108,154,.06) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 70% 30%,rgba(0,0,0,.9),transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 70% 30%,rgba(0,0,0,.9),transparent 72%);
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:56px;
  align-items:center;
}
.hero h1{
  font-size:clamp(32px,4vw,52px);
  line-height:1.15;
  font-weight:700;
  letter-spacing:.4px;
}
.hero h1 .hl{color:var(--c-brand)}
.hero-lead{
  margin-top:22px;
  font-size:17px;
  line-height:1.85;
  color:var(--c-muted);
  max-width:560px;
}
.hero-cta{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px}
.hero-tags{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px}
.hero-tags span{
  font-size:13px;
  color:var(--c-muted);
  padding:5px 12px;
  border:1px dashed var(--c-border);
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.7);
}
.hero-media{
  position:relative;
  margin:0;
  border-radius:20px;
  overflow:hidden;
  box-shadow:var(--sh-lg);
  aspect-ratio:4/3;
  background:var(--c-brand-soft);
}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-float{
  position:absolute;
  left:20px;
  bottom:20px;
  right:auto;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(8px);
  border:1px solid var(--c-border);
  border-radius:14px;
  padding:14px 18px;
  box-shadow:var(--sh-md);
  max-width:290px;
}
.hero-float strong{display:block;font-size:22px;color:var(--c-brand-strong);line-height:1.3}
.hero-float span{display:block;font-size:13px;color:var(--c-muted);margin-top:4px}

/* ---------- 数据带 ---------- */
.data-strip{
  background:linear-gradient(135deg,#10303F 0%,#1B4457 100%);
  border-radius:20px;
  padding:48px 40px;
  color:#fff;
  box-shadow:var(--sh-lg);
}
.data-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:32px;
}
.data-item{position:relative;padding-left:0}
.data-item + .data-item::before{
  content:"";
  position:absolute;
  left:-16px;top:6px;bottom:6px;
  width:1px;
  background:rgba(255,255,255,.16);
}
.data-num{
  font-size:clamp(28px,3vw,40px);
  font-weight:700;
  line-height:1.1;
  letter-spacing:.5px;
  color:#fff;
}
.data-num small{font-size:16px;font-weight:600;margin-left:2px;color:rgba(255,255,255,.75)}
.data-label{margin-top:10px;font-size:14px;color:rgba(255,255,255,.72);line-height:1.6}

/* ---------- 时间线 ---------- */
.timeline{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:20px;
  position:relative;
}
.timeline::before{
  content:"";
  position:absolute;
  left:24px;right:24px;top:23px;
  height:2px;
  background:linear-gradient(90deg,var(--c-brand-soft),var(--c-border));
  z-index:0;
}
.step{
  position:relative;
  z-index:1;
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  padding:26px 22px 24px;
  box-shadow:var(--sh-sm);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#C9DEEC}
.step-no{
  width:46px;height:46px;
  border-radius:14px;
  background:var(--c-brand);
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;
  font-size:16px;
  margin-bottom:18px;
  box-shadow:0 8px 18px rgba(43,108,154,.22);
}
.step h3{font-size:18px;line-height:1.4;margin-bottom:10px}
.step p{font-size:14px;color:var(--c-muted);line-height:1.7}
.step-meta{margin-top:14px;font-size:12.5px;color:var(--c-accent);font-weight:600}

/* ---------- 方案对比 ---------- */
.compare-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  align-items:stretch;
}
.compare-card{
  display:flex;
  flex-direction:column;
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  padding:28px 26px;
  box-shadow:var(--sh-sm);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.compare-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md)}
.compare-card.is-featured{
  border-color:var(--c-brand);
  box-shadow:var(--sh-md);
  position:relative;
}
.compare-card.is-featured::after{
  content:"多数业务选择";
  position:absolute;
  top:-13px;
  left:26px;
  background:var(--c-brand);
  color:#fff;
  font-size:12px;
  font-weight:600;
  padding:4px 12px;
  border-radius:var(--r-pill);
}
.compare-card h3{font-size:20px;margin-top:14px}
.compare-card .plan-desc{margin-top:12px;font-size:14.5px;color:var(--c-muted);line-height:1.75}
.plan-specs{margin-top:22px;border-top:1px solid var(--c-border);padding-top:6px}
.plan-specs div{
  display:flex;
  justify-content:space-between;
  gap:12px;
  padding:12px 0;
  border-bottom:1px solid var(--c-border);
  font-size:14px;
}
.plan-specs dt{color:var(--c-muted)}
.plan-specs dd{font-weight:600;color:var(--c-text);text-align:right}
.compare-card .btn{margin-top:24px}

/* ---------- 场景双图 ---------- */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:28px;
}
.scene-card{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-sm);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md)}
.scene-card figure{margin:0;aspect-ratio:16/9;overflow:hidden;background:var(--c-brand-soft)}
.scene-card img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.scene-card:hover img{transform:scale(1.04)}
.scene-body{padding:26px 26px 28px}
.scene-body h3{font-size:20px;margin-top:12px}
.scene-body p{margin-top:12px;font-size:14.5px;color:var(--c-muted);line-height:1.75}
.scene-list{margin-top:18px;display:grid;gap:10px}
.scene-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14px;color:var(--c-text);
}
.scene-list svg{width:18px;height:18px;color:var(--c-accent);margin-top:4px}

/* ---------- 支持列表 ---------- */
.support-wrap{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:48px;
  align-items:start;
}
.support-list{border-top:1px solid var(--c-border)}
.support-item{
  display:grid;
  grid-template-columns:56px 1fr;
  gap:20px;
  padding:24px 4px;
  border-bottom:1px solid var(--c-border);
  transition:background .2s var(--ease),padding-left .2s var(--ease);
}
.support-item:hover{background:var(--c-brand-soft);padding-left:14px;border-radius:10px}
.support-icon{
  width:48px;height:48px;
  border-radius:14px;
  background:var(--c-brand-soft);
  color:var(--c-brand);
  display:flex;align-items:center;justify-content:center;
}
.support-icon svg{width:22px;height:22px}
.support-item h3{font-size:17px;margin-bottom:8px}
.support-item p{font-size:14px;color:var(--c-muted);line-height:1.7}

/* ---------- FAQ ---------- */
.faq-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:0 40px;
  border-top:1px solid var(--c-border);
}
.faq-item{border-bottom:1px solid var(--c-border)}
.faq-item summary{
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:56px;
  padding:16px 4px;
  font-size:16.5px;
  font-weight:600;
  cursor:pointer;
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--c-brand-strong)}
.faq-item summary::after{
  content:"";
  flex:0 0 18px;
  width:18px;height:18px;
  background:
    linear-gradient(var(--c-brand),var(--c-brand)) center/12px 2px no-repeat,
    linear-gradient(var(--c-brand),var(--c-brand)) center/2px 12px no-repeat;
  transition:transform .25s var(--ease);
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-body{padding:0 4px 22px;font-size:15px;color:var(--c-muted);line-height:1.8}

/* ---------- CTA / 表单 ---------- */
.cta-section{padding:0 0 96px}
.cta-panel{
  background:linear-gradient(135deg,#10303F 0%,#1E4F73 100%);
  border-radius:24px;
  padding:56px 48px;
  color:#fff;
  display:grid;
  grid-template-columns:.95fr 1.05fr;
  gap:48px;
  box-shadow:var(--sh-lg);
  position:relative;
  overflow:hidden;
}
.cta-panel::before{
  content:"";
  position:absolute;
  width:420px;height:420px;
  right:-140px;top:-160px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(60,140,122,.32),transparent 65%);
  pointer-events:none;
}
.cta-info{position:relative;z-index:1}
.cta-info h2{font-size:clamp(26px,2.6vw,34px);line-height:1.3}
.cta-info p{margin-top:16px;color:rgba(255,255,255,.78);font-size:15.5px;line-height:1.8}
.cta-points{margin-top:26px;display:grid;gap:12px}
.cta-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:rgba(255,255,255,.86)}
.cta-points svg{width:18px;height:18px;color:#7FD0BC;margin-top:4px}
.form-card{
  position:relative;
  z-index:1;
  background:var(--c-surface);
  border-radius:18px;
  padding:30px 28px;
  color:var(--c-text);
  box-shadow:var(--sh-lg);
}
.form-card h3{font-size:19px;margin-bottom:6px}
.form-card .form-tip{font-size:13.5px;color:var(--c-muted);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:7px;color:var(--c-text)}
.field input,.field select,.field textarea{
  width:100%;
  min-height:48px;
  padding:12px 14px;
  font:inherit;
  font-size:14.5px;
  color:var(--c-text);
  background:#FBFDFE;
  border:1px solid var(--c-border);
  border-radius:var(--r-btn);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.field textarea{min-height:104px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  background:#fff;
  border-color:var(--c-brand);
  box-shadow:0 0 0 3px rgba(43,108,154,.16);
}
.field input:invalid:not(:placeholder-shown){border-color:var(--c-error)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.checkbox{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:13px;
  color:var(--c-muted);
  margin:6px 0 20px;
  line-height:1.6;
}
.checkbox input{width:18px;height:18px;margin-top:2px;accent-color:var(--c-brand)}
.checkbox a{color:var(--c-brand);text-decoration:underline;text-underline-offset:3px}
.form-status{margin-top:14px;font-size:13.5px;display:none}
.form-status.ok{display:block;color:var(--c-success)}
.form-status.err{display:block;color:var(--c-error)}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-ink);
  color:rgba(255,255,255,.74);
  padding:72px 0 32px;
  font-size:14.5px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  color:#fff;font-size:18px;font-weight:700;margin-bottom:16px;
}
.footer-brand .brand-mark{background:rgba(255,255,255,.10);color:#7FD0BC}
.site-footer p{line-height:1.8;color:rgba(255,255,255,.66)}
.site-footer h4{
  color:#fff;
  font-size:15px;
  font-weight:600;
  margin-bottom:18px;
}
.footer-links{display:grid;gap:12px}
.footer-links a{color:rgba(255,255,255,.72)}
.footer-links a:hover{color:#7FD0BC}
.footer-contact{display:grid;gap:14px}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;line-height:1.7}
.footer-contact svg{width:18px;height:18px;color:#7FD0BC;margin-top:4px}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding-top:26px;
  font-size:13.5px;
  color:rgba(255,255,255,.56);
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.16);
  color:#fff;
  border-radius:var(--r-pill);
  padding:9px 18px;
  font-size:13.5px;
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.to-top:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.3)}
.to-top svg{width:16px;height:16px}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1040px}
  .nav-shell{margin-left:20px;margin-right:20px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
  .nav-shell{padding:8px 10px 8px 16px}
  .nav-links{
    position:absolute;
    left:0;right:0;top:calc(100% + 12px);
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    background:rgba(255,255,255,.98);
    border:1px solid var(--c-border);
    border-radius:20px;
    padding:14px;
    box-shadow:var(--sh-lg);
    margin-left:0;
  }
  .nav-shell.nav-open .nav-links{display:flex}
  .nav-links a{padding:12px 16px;border-radius:12px}
  .nav-toggle{display:inline-flex}
  .nav-shell .btn-primary{display:none}
  .hero{padding:44px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-media{aspect-ratio:16/9}
  .hero-lead{max-width:none}
  .data-strip{padding:36px 28px}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:26px}
  .data-item + .data-item::before{display:none}
  .timeline{grid-template-columns:repeat(2,1fr);gap:18px}
  .timeline::before{display:none}
  .compare-grid{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .support-wrap{grid-template-columns:1fr;gap:32px}
  .faq-grid{grid-template-columns:1fr;gap:0}
  .cta-panel{grid-template-columns:1fr;padding:40px 30px;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .section-head{margin-bottom:30px}
  .container{padding:0 18px}
  .nav-shell{margin-left:14px;margin-right:14px}
  .brand{font-size:16px}
  .hero h1{font-size:clamp(28px,7vw,36px)}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .hero-float{left:12px;right:12px;bottom:12px;max-width:none}
  .data-grid{grid-template-columns:1fr;gap:22px}
  .timeline{grid-template-columns:1fr}
  .faq-item summary{font-size:15.5px}
  .cta-panel{padding:32px 22px;border-radius:18px}
  .form-card{padding:24px 20px}
  .field-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .footer-bottom .to-top{width:100%;justify-content:center}
}
@media (max-width:519px){
  body{font-size:15.5px}
  .data-num{font-size:28px}
  .scene-body{padding:22px 20px 24px}
  .compare-card{padding:24px 20px}
  .support-item{grid-template-columns:44px 1fr;gap:14px}
  .support-icon{width:40px;height:40px;border-radius:12px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --c-brand:#2B6C9A;
  --c-brand-strong:#1E4F73;
  --c-brand-soft:#EAF3F8;
  --c-accent:#3C8C7A;
  --c-accent-soft:#E6F2EF;
  --c-warm:#C97B3D;
  --c-bg:#F7FAFC;
  --c-surface:#FFFFFF;
  --c-text:#14232E;
  --c-muted:#5E7181;
  --c-border:#DDE8EF;
  --c-error:#D65A4A;
  --c-success:#2E8B7A;
  --c-footer:#10303F;
  --r-btn:10px;
  --r-card:16px;
  --r-img:12px;
  --r-input:10px;
  --r-pill:999px;
  --sh-sm:0 4px 12px rgba(18,35,52,.05);
  --sh-md:0 8px 24px rgba(18,35,52,.07);
  --sh-lg:0 16px 40px rgba(18,35,52,.10);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p{margin:0}
ul{margin:0;padding:0;list-style:none}
svg{display:block}
:focus-visible{outline:2px solid var(--c-brand);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-head{max-width:740px;margin-bottom:40px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--c-accent);background:var(--c-accent-soft);border-radius:var(--r-pill);padding:6px 14px;margin-bottom:16px}
h1{font-size:clamp(32px,4vw,56px);line-height:1.15;font-weight:700;letter-spacing:-.5px}
h2{font-size:clamp(28px,3vw,36px);line-height:1.25;font-weight:700}
h3{font-size:clamp(20px,2vw,24px);line-height:1.4;font-weight:600}
.section-head p{color:var(--c-muted);margin-top:14px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .18s ease,background .2s ease,box-shadow .2s ease,color .2s ease}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--c-brand);color:#fff;box-shadow:0 6px 16px rgba(43,108,154,.22)}
.btn-primary:hover{background:var(--c-brand-strong);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:0 3px 10px rgba(43,108,154,.24)}
.btn-ghost{background:transparent;color:var(--c-brand-strong);border-color:var(--c-brand)}
.btn-ghost:hover{background:var(--c-brand-soft);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.pill{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--c-brand-strong);background:var(--c-brand-soft);border:1px solid #D3E5F0;border-radius:var(--r-pill);padding:6px 14px}

/* 导航 */
.site-header{position:sticky;top:16px;z-index:80;padding:16px 24px 0}
.nav-pill{position:relative;max-width:1180px;margin:0 auto;min-height:64px;display:flex;align-items:center;gap:20px;padding:8px 12px 8px 20px;background:rgba(255,255,255,.86);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--c-border);border-radius:var(--r-pill);box-shadow:var(--sh-sm);transition:background .25s ease,box-shadow .25s ease}
.site-header.is-scrolled .nav-pill{background:rgba(255,255,255,.96);box-shadow:var(--sh-md)}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--c-brand-strong);white-space:nowrap}
.brand-mark{width:36px;height:36px;border-radius:11px;background:var(--c-brand-soft);color:var(--c-brand);display:grid;place-items:center;border:1px solid #D3E5F0}
.brand-mark svg{width:20px;height:20px}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links a{padding:9px 16px;border-radius:var(--r-pill);font-size:15px;color:var(--c-muted);transition:background .2s ease,color .2s ease}
.nav-links a:hover{background:var(--c-brand-soft);color:var(--c-brand-strong)}
.nav-links a.active{background:var(--c-brand-soft);color:var(--c-brand-strong);font-weight:600}
.nav-links a.nav-drawer-cta{display:none}
.nav-toggle{display:none;width:42px;height:42px;flex:none;border-radius:var(--r-pill);border:1px solid var(--c-border);background:#fff;color:var(--c-brand-strong);align-items:center;justify-content:center;cursor:pointer;margin-left:auto}
.nav-toggle svg{width:20px;height:20px}
.nav-cta{margin-left:8px}

/* Hero */
.hero-cat3{position:relative;overflow:hidden;padding:76px 0 0}
.hero-bg{position:absolute;inset:0;background-image:linear-gradient(180deg,rgba(247,250,252,.94),rgba(247,250,252,.88) 45%,#F7FAFC 100%),url('/assets/images/backpic/back-3.webp');background-size:cover;background-position:center;z-index:0}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding-top:24px}
.hero-copy .pill{margin-bottom:20px}
.hero-sub{margin-top:20px;font-size:18px;color:var(--c-muted);max-width:560px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.hero-facts{display:flex;flex-direction:column;gap:10px;margin-top:32px}
.hero-facts li{position:relative;padding-left:22px;font-size:15px;color:var(--c-muted)}
.hero-facts li::before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:50%;background:var(--c-accent)}
.hero-panel{background:linear-gradient(160deg,#10303F,#0C2531);border-radius:20px;padding:26px;color:#D8E7EF;box-shadow:var(--sh-lg);position:relative;overflow:hidden}
.hero-panel::after{content:"";position:absolute;right:-60px;bottom:-70px;width:220px;height:220px;background:radial-gradient(circle,rgba(60,140,122,.38),transparent 70%);pointer-events:none}
.panel-head{display:flex;align-items:center;justify-content:space-between;font-size:15px;font-weight:600;color:#fff;padding-bottom:14px;border-bottom:1px solid rgba(221,232,239,.16)}
.panel-tag{font-size:12px;font-weight:500;color:#8EC7B8;background:rgba(60,140,122,.18);border-radius:var(--r-pill);padding:3px 10px}
.node-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0;border-bottom:1px solid rgba(221,232,239,.12);font-size:14px;position:relative;z-index:1}
.node-row:last-child{border-bottom:0}
.node-row .state{display:inline-flex;align-items:center;gap:8px;color:#A9C6D4;font-size:13px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--c-success);box-shadow:0 0 0 4px rgba(46,139,122,.18)}
.dot-warm{background:var(--c-warm);box-shadow:0 0 0 4px rgba(201,123,61,.18)}
.stat-strip{margin-top:64px}
.stat-grid{position:relative;z-index:1;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;background:var(--c-surface);border:1px solid var(--c-border);border-radius:20px;box-shadow:var(--sh-md);padding:28px 32px}
.stat-item{border-left:2px solid var(--c-brand-soft);padding-left:18px}
.stat-item .num{font-size:clamp(24px,2.4vw,32px);font-weight:700;color:var(--c-brand-strong);line-height:1.2}
.stat-item .lbl{font-size:14px;color:var(--c-muted);margin-top:4px}

/* 概览图文 */
.intro-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.intro-figure{border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-lg);border:1px solid var(--c-border);background:var(--c-surface)}
.intro-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.intro-body p{color:var(--c-muted);margin-top:18px}
.point-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px 24px;margin-top:30px}
.point{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--c-text);background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);padding:14px 16px;box-shadow:var(--sh-sm);transition:transform .2s ease,box-shadow .2s ease}
.point:hover{transform:translateY(-3px);box-shadow:var(--sh-md)}
.point svg{flex:none;width:20px;height:20px;color:var(--c-accent);margin-top:3px}

/* 深色带 */
.dark-band{position:relative;color:#E4EFF4;background-image:linear-gradient(120deg,rgba(16,48,63,.94),rgba(12,37,49,.9)),url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;padding:88px 0}
.dark-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:center}
.dark-band h2{color:#fff}
.dark-band .lead{color:#A9C6D4;margin-top:18px;max-width:520px}
.dark-band .eyebrow{background:rgba(60,140,122,.2);color:#9BD3C4}
.dark-cards{display:grid;gap:16px}
.dark-card{background:rgba(255,255,255,.07);border:1px solid rgba(221,232,239,.16);border-radius:var(--r-card);padding:22px 24px;transition:background .2s ease,transform .2s ease}
.dark-card:hover{background:rgba(255,255,255,.12);transform:translateY(-3px)}
.dark-card h3{color:#fff;font-size:18px;margin-bottom:8px}
.dark-card p{font-size:14px;color:#A9C6D4}

/* 支持列表 */
.support-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 56px}
.support-item{display:flex;gap:16px;padding:26px 0;border-top:1px solid var(--c-border)}
.support-item .ico{flex:none;width:44px;height:44px;border-radius:12px;background:var(--c-brand-soft);color:var(--c-brand-strong);display:grid;place-items:center;border:1px solid #D3E5F0}
.support-item .ico svg{width:22px;height:22px}
.support-item h3{font-size:19px;margin-bottom:6px}
.support-item p{color:var(--c-muted);font-size:15px}

/* 时间线 */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:8px}
.step{position:relative}
.step .idx{width:40px;height:40px;border-radius:50%;background:var(--c-brand);color:#fff;display:grid;place-items:center;font-weight:600;margin-bottom:18px;box-shadow:0 0 0 6px var(--c-brand-soft)}
.step h3{font-size:19px;margin-bottom:8px}
.step p{color:var(--c-muted);font-size:15px}
.step:not(:last-child)::after{content:"";position:absolute;top:20px;left:56px;right:-14px;height:2px;background:linear-gradient(90deg,var(--c-border),rgba(221,232,239,.2))}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 56px;align-items:start}
.faq-item{border-bottom:1px solid var(--c-border)}
.faq-item summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px;padding:16px 0;cursor:pointer}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary h3{font-size:17px;font-weight:600}
.faq-item .plus{flex:none;width:28px;height:28px;border-radius:50%;border:1px solid var(--c-border);display:grid;place-items:center;color:var(--c-brand-strong);transition:transform .25s ease,background .25s ease}
.faq-item .plus svg{width:16px;height:16px}
.faq-item[open] .plus{transform:rotate(45deg);background:var(--c-brand-soft)}
.faq-item .answer{padding:0 0 20px;color:var(--c-muted);font-size:15px}

/* CTA */
.cta-card{background:linear-gradient(135deg,var(--c-brand-soft),#FFFFFF 62%);border:1px solid var(--c-border);border-radius:20px;padding:44px;display:flex;align-items:center;justify-content:space-between;gap:32px;box-shadow:var(--sh-md)}
.cta-card h2{font-size:clamp(24px,2.4vw,30px)}
.cta-card p{color:var(--c-muted);margin-top:12px;max-width:620px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 页脚 */
.site-footer{background:var(--c-footer);color:#C9D9E2;margin-top:96px;padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff}
.brand-mark--footer{width:38px;height:38px;border-radius:11px;background:rgba(255,255,255,.08);display:grid;place-items:center;color:#8EC7B8}
.brand-mark--footer svg{width:20px;height:20px}
.site-footer p{font-size:14px;line-height:1.8;color:#9FB6C2;margin-top:14px}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:#9FB6C2;transition:color .2s ease}
.footer-links a:hover{color:#8EC7B8}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:#9FB6C2;align-items:flex-start}
.footer-contact svg{width:18px;height:18px;flex:none;margin-top:3px;color:#8EC7B8}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;border-top:1px solid rgba(221,232,239,.14);margin-top:48px;padding:22px 0;font-size:13px;color:#8AA3B0}
.to-top{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.06);border:1px solid rgba(221,232,239,.18);color:#C9D9E2;border-radius:var(--r-pill);padding:8px 16px;font-size:13px;cursor:pointer;transition:background .2s ease,color .2s ease}
.to-top:hover{background:rgba(255,255,255,.14);color:#fff}
.to-top svg{width:16px;height:16px;color:#8EC7B8}

/* 响应式 */
@media (max-width:1199px){
  .hero-inner{gap:40px}
}
@media (max-width:1023px){
  .site-header{padding:12px 20px 0}
  .nav-toggle{display:inline-flex}
  .nav-cta{display:none}
  .nav-links{position:absolute;top:calc(100% + 12px);left:0;right:0;flex-direction:column;align-items:stretch;gap:4px;background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-lg);padding:12px;display:none}
  .nav-links.is-open{display:flex}
  .nav-links a{padding:12px 16px;border-radius:12px}
  .nav-links a.nav-drawer-cta{display:flex;justify-content:center;margin-top:6px;background:var(--c-brand);color:#fff;font-weight:600}
  .nav-links a.nav-drawer-cta:hover{background:var(--c-brand-strong);color:#fff}
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero-sub{max-width:none}
  .stat-grid{grid-template-columns:repeat(2,1fr);padding:24px}
  .intro-grid{grid-template-columns:1fr;gap:36px}
  .dark-grid{grid-template-columns:1fr;gap:36px}
  .support-grid,.faq-grid{grid-template-columns:1fr;gap:0}
  .timeline{grid-template-columns:1fr 1fr}
  .step:nth-child(2)::after{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
  .section{padding:72px 0}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .hero-cat3{padding-top:56px}
  .hero-actions{gap:10px}
  .point-grid{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr;gap:24px}
  .step:not(:last-child)::after{display:none}
  .cta-card{flex-direction:column;align-items:flex-start;padding:28px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .site-footer{padding-top:56px;margin-top:64px}
}
@media (max-width:519px){
  .container{padding:0 18px}
  .site-header{padding:10px 14px 0}
  .brand{font-size:16px}
  h1{letter-spacing:0}
  .hero-actions .btn{width:100%}
  .stat-grid{grid-template-columns:1fr 1fr;gap:18px;padding:20px}
  .stat-item{padding-left:14px}
  .cta-actions .btn{width:100%}
  .hero-bg{background-image:linear-gradient(180deg,rgba(247,250,252,.96),rgba(247,250,252,.92) 45%,#F7FAFC 100%)}
}