/* roulang page: index */
:root{
  --brand-600:#1F5FA8;
  --brand-700:#17427A;
  --brand-500:#2E7BD6;
  --brand-050:#EDF4FD;
  --accent-500:#F2913D;
  --accent-600:#E07A22;
  --star-400:#7A6BE8;
  --ink-900:#101E33;
  --ink-600:#4A5A72;
  --ink-400:#7A879B;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --line:#E3E9F2;
  --dark:#0F1B2D;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --sh-1:0 1px 2px rgba(16,30,51,.05),0 8px 24px rgba(16,30,51,.07);
  --sh-2:0 12px 32px rgba(16,30,51,.10);
  --ease:220ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-900);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand-700)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:-.01em;font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
::selection{background:var(--brand-050);color:var(--brand-700)}

.shell{width:100%;max-width:1240px;margin:0 auto;padding-left:16px;padding-right:16px}
@media(min-width:768px){.shell{padding-left:24px;padding-right:24px}}
@media(min-width:1400px){.shell{max-width:1280px}}
.section{padding:76px 0}
.section--tight{padding:60px 0}
@media(max-width:767px){
  .section{padding:48px 0}
  .section--tight{padding:40px 0}
}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap}
.section-head h2{font-size:29px;font-weight:700}
.section-head .sub{margin-top:8px;color:var(--ink-600);font-size:15px;max-width:680px;line-height:1.7}
.section-head .head-link{font-size:14px;font-weight:600;color:var(--brand-600);white-space:nowrap;display:inline-flex;align-items:center;gap:6px}
.section-head .head-link:hover{gap:10px}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease);
}
.site-header.scrolled{box-shadow:0 6px 22px rgba(16,30,51,.08)}
.nav-wrap{height:68px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink-900);font-weight:700}
.brand:hover{color:var(--ink-900)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand-600);
  display:grid;place-items:center;color:#fff;flex:0 0 auto;
}
.brand-mark svg{width:19px;height:19px;display:block}
.brand-text{font-size:16px;letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:6px}
.main-nav a{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-600);padding:6px 0;white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;border-radius:2px;
  background:var(--brand-600);transition:width .22s ease,left .22s ease;
}
.main-nav a:hover,.main-nav a.active{color:var(--brand-700)}
.main-nav a:hover::after,.main-nav a.active::after{width:100%;left:0}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-search{position:relative}
.nav-search input{
  width:220px;height:38px;border-radius:999px;border:1px solid var(--line);background:var(--bg);
  padding:0 16px 0 38px;font-size:14px;color:var(--ink-900);outline:none;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.nav-search input::placeholder{color:var(--ink-400)}
.nav-search input:focus{background:#fff;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(46,123,214,.16)}
.nav-search svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:15px;height:15px;color:var(--ink-400)}
.btn-ghost{
  display:inline-flex;align-items:center;height:38px;padding:0 16px;border-radius:var(--r-sm);
  font-size:14px;font-weight:600;color:var(--brand-600);border:1.5px solid transparent;transition:all var(--ease);
}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-700)}
.btn-accent{
  display:inline-flex;align-items:center;height:38px;padding:0 18px;border-radius:var(--r-sm);
  font-size:14px;font-weight:600;color:#fff;background:var(--accent-500);border:none;
  transition:all var(--ease);
}
.btn-accent:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 8px 18px rgba(224,122,34,.28)}
.btn-accent:active{transform:translateY(0)}
.nav-toggle{
  display:none;width:40px;height:38px;border-radius:var(--r-sm);border:1px solid var(--line);background:#fff;
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:17px;height:2px;background:var(--ink-900);position:relative;border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:17px;height:2px;background:var(--ink-900);border-radius:2px}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}
@media(max-width:1099px){.nav-search input{width:170px}}
@media(max-width:991px){
  .main-nav,.nav-search,.btn-ghost{display:none}
  .nav-toggle{display:inline-flex}
  .nav-actions{margin-left:auto}
}
.nav-mask{
  position:fixed;inset:0;background:rgba(16,30,51,.42);opacity:0;visibility:hidden;
  transition:opacity .24s ease,visibility .24s ease;z-index:1035;
}
.nav-mask.show{opacity:1;visibility:visible}
.nav-drawer{
  position:fixed;top:68px;right:0;bottom:0;width:min(320px,86vw);background:#fff;z-index:1040;
  transform:translateX(102%);transition:transform .26s ease;box-shadow:-14px 0 34px rgba(16,30,51,.12);
  padding:22px 20px 28px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.nav-drawer.open{transform:translateX(0)}
.nav-drawer a.d-item{
  display:flex;align-items:center;justify-content:space-between;padding:14px 14px;border-radius:var(--r-sm);
  color:var(--ink-900);font-size:15px;font-weight:600;background:var(--bg);
}
.nav-drawer a.d-item:hover,.nav-drawer a.d-item.active{background:var(--brand-050);color:var(--brand-700)}
.nav-drawer .d-search{margin-top:8px}
.nav-drawer .d-search input{
  width:100%;height:46px;border-radius:var(--r-sm);border:1px solid var(--line);background:#fff;
  padding:0 14px;font-size:15px;outline:none;
}
.nav-drawer .d-search input:focus{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(46,123,214,.16)}
.nav-drawer .d-foot{margin-top:auto;display:grid;gap:10px;padding-top:18px;border-top:1px solid var(--line)}

/* ---------- 按钮 ---------- */
.btn-primary-c{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;
  border-radius:var(--r-sm);background:var(--brand-600);color:#fff;font-size:15px;font-weight:600;border:none;
  cursor:pointer;transition:background var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn-primary-c:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(23,66,122,.26)}
.btn-primary-c:active{transform:translateY(0);box-shadow:none}
.btn-outline-c{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;
  border-radius:var(--r-sm);background:#fff;color:var(--brand-600);font-size:15px;font-weight:600;
  border:1.5px solid var(--brand-600);cursor:pointer;
  transition:background var(--ease),color var(--ease),transform var(--ease);
}
.btn-outline-c:hover{background:var(--brand-050);color:var(--brand-700);transform:translateY(-1px)}
.btn-outline-c:active{transform:translateY(0)}
.btn-accent-c{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;
  border-radius:var(--r-sm);background:var(--accent-500);color:#fff;font-size:15px;font-weight:600;border:none;
  cursor:pointer;transition:background var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn-accent-c:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(224,122,34,.28)}
.btn-accent-c:active{transform:translateY(0);box-shadow:none}
.btn-sm-c{height:38px;padding:0 16px;font-size:14px}

/* ---------- 通用标签 ---------- */
.badge-chip{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;
  padding:3px 10px;border-radius:6px;background:var(--brand-050);color:var(--brand-700);
  white-space:nowrap;line-height:1.6;
}
.badge-chip--star{background:#F1EFFC;color:#5A4BD1;box-shadow:inset 0 0 0 1px rgba(122,107,232,.32)}
.badge-count{
  display:inline-flex;align-items:center;font-size:12px;font-weight:600;padding:2px 9px;border-radius:999px;
  background:var(--bg);color:var(--ink-600);border:1px solid var(--line);white-space:nowrap;
}
.dot-time{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--ink-400)}
.dot-time::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--ink-400);opacity:.6;flex:0 0 auto}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;padding:56px 0 62px;
  background:
    radial-gradient(880px 420px at 8% -12%,rgba(122,107,232,.10),transparent 62%),
    radial-gradient(760px 400px at 96% -6%,rgba(46,123,214,.14),transparent 64%),
    var(--bg);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(31,95,168,.16) 1px,transparent 1px);
  background-size:26px 26px;opacity:.30;
  -webkit-mask-image:linear-gradient(160deg,rgba(0,0,0,.9),transparent 62%);
  mask-image:linear-gradient(160deg,rgba(0,0,0,.9),transparent 62%);
}
.hero .shell{position:relative;z-index:1}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand-700);
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;box-shadow:var(--sh-1);
}
.hero-eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--star-400);display:block}
.hero h1{
  font-size:clamp(28px,4vw,44px);line-height:1.24;font-weight:700;letter-spacing:-.01em;margin:20px 0 0;
  max-width:16em;
}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.75;color:var(--ink-600);max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
@media(max-width:479px){
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn-primary-c,.hero-actions .btn-outline-c{width:100%}
}
.hero-metrics{
  display:flex;flex-wrap:wrap;gap:12px;margin-top:34px;padding-top:24px;border-top:1px dashed var(--line);
}
.metric{
  flex:1 1 130px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:14px 16px;box-shadow:var(--sh-1);
}
.metric strong{display:block;font-size:22px;font-weight:700;color:var(--brand-700);letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.metric span{display:block;margin-top:2px;font-size:13px;color:var(--ink-400)}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:18px;
  border:1px solid rgba(255,255,255,.7);box-shadow:var(--sh-1);
}
.hero-media::after{
  content:"";position:absolute;inset:0;border-radius:18px;pointer-events:none;
  background:linear-gradient(180deg,rgba(246,248,251,.02),rgba(246,248,251,.30));
}

/* ---------- 合集目录索引 ---------- */
.topic-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.topic-item{
  position:relative;display:flex;align-items:center;gap:16px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);padding:18px 20px 18px 24px;overflow:hidden;
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.topic-item::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:4px;border-radius:0 4px 4px 0;background:var(--brand-600);
}
.topic-item:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--brand-050);color:inherit}
.topic-num{
  font-size:24px;font-weight:700;color:var(--ink-400);opacity:.55;flex:0 0 auto;min-width:36px;
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.topic-body{flex:1 1 auto;min-width:0}
.topic-title{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.topic-title h3{font-size:17px;font-weight:600}
.topic-desc{margin-top:5px;font-size:14px;color:var(--ink-600);line-height:1.65}
.topic-arrow{flex:0 0 auto;color:var(--ink-400);transition:transform var(--ease),color var(--ease)}
.topic-item:hover .topic-arrow{transform:translateX(4px);color:var(--brand-600)}
@media(max-width:767px){
  .topic-index{grid-template-columns:1fr}
  .topic-num{font-size:20px;min-width:30px}
}

/* ---------- 精选条目流 ---------- */
.feature-grid{display:grid;grid-template-columns:2fr 1fr;gap:24px;align-items:stretch}
.feature-main{
  display:grid;grid-template-columns:40% 1fr;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.feature-main:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--brand-050)}
.feature-main .fm-media{position:relative;overflow:hidden;min-height:300px}
.feature-main .fm-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.feature-main .fm-body{padding:26px 28px;display:flex;flex-direction:column;gap:12px}
.feature-main h3{font-size:22px;line-height:1.45;font-weight:700}
.feature-main h3 a{color:var(--ink-900)}
.feature-main h3 a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.feature-main .fm-text{font-size:15px;color:var(--ink-600);line-height:1.8}
.feature-main .fm-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding-top:8px}
.feature-side{display:grid;grid-template-rows:repeat(3,minmax(0,1fr));gap:16px}
.mini-card{
  display:grid;grid-template-columns:100px 1fr;gap:14px;padding:12px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.mini-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--brand-050)}
.mini-card img{width:100px;height:100%;min-height:78px;object-fit:cover;border-radius:10px}
.mini-card h3{font-size:15px;font-weight:600;line-height:1.55}
.mini-card h3 a{color:var(--ink-900)}
.mini-card h3 a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:2px}
.mini-card .mc-meta{margin-top:8px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
@media(max-width:991px){
  .feature-grid{grid-template-columns:1fr}
  .feature-main{grid-template-columns:1fr}
  .feature-main .fm-media{min-height:0;aspect-ratio:16/9;position:relative}
  .feature-main .fm-media img{position:absolute}
  .feature-side{grid-template-rows:auto}
}

/* ---------- 最新信息 ---------- */
.news-list{display:grid;gap:14px}
.news-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:20px 22px;
  display:flex;flex-direction:column;gap:10px;
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.news-item:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--brand-050)}
.news-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.news-title{font-size:18px;font-weight:600;line-height:1.55}
.news-title a{color:var(--ink-900)}
.news-title a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.news-excerpt{font-size:14px;color:var(--ink-600);line-height:1.75}
.news-more{align-self:flex-start;font-size:14px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px;transition:gap var(--ease)}
.news-more:hover{gap:10px;color:var(--brand-700)}
.empty-state{
  background:#fff;border:1px dashed var(--line);border-radius:var(--r-md);padding:56px 24px;text-align:center;
}
.empty-state .es-icon{
  width:56px;height:56px;border-radius:16px;background:var(--brand-050);color:var(--brand-600);
  display:grid;place-items:center;margin:0 auto 16px;
}
.empty-state p{font-size:15px;color:var(--ink-600)}
.empty-state .es-link{display:inline-flex;margin-top:14px;font-size:14px;font-weight:600}

/* ---------- 相关推荐 ---------- */
.rec-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;height:100%;
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.rec-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--brand-050)}
.rec-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.rec-card .rc-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:9px;flex:1 1 auto}
.rec-card h3{font-size:16px;font-weight:600;line-height:1.55}
.rec-card h3 a{color:var(--ink-900)}
.rec-card h3 a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:2px}
.rec-card .rc-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}

/* ---------- 收藏 / 分享窄条 ---------- */
.cta-strip{
  background:linear-gradient(180deg,#fff,var(--brand-050));
  border:1px solid var(--line);border-radius:20px;padding:26px 28px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  box-shadow:var(--sh-1);
}
.cta-strip h2{font-size:20px;font-weight:700}
.cta-strip p{margin-top:6px;font-size:14px;color:var(--ink-600);max-width:52em}
.cta-strip .cta-btns{display:flex;gap:12px;flex-wrap:wrap}
@media(max-width:575px){
  .cta-strip{padding:22px 18px}
  .cta-strip .cta-btns{width:100%;flex-direction:column}
  .cta-strip .cta-btns button{width:100%}
}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;max-width:920px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease)}
.faq-item.open{border-color:var(--brand-050);box-shadow:var(--sh-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;text-align:left;
  background:transparent;border:none;padding:18px 20px;cursor:pointer;font-size:16px;font-weight:600;color:var(--ink-900);
  transition:color var(--ease);
}
.faq-q:hover{color:var(--brand-600)}
.faq-item.open .faq-q{color:var(--brand-700)}
.faq-icon{
  position:relative;flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  background:var(--brand-050);border:1px solid rgba(31,95,168,.16);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--brand-600);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform .24s ease,opacity .24s ease;
}
.faq-icon::before{width:11px;height:2px}
.faq-icon::after{width:2px;height:11px}
.faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--ink-600)}
.faq-a-inner p+p{margin-top:10px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#C7D2E3;margin-top:0;position:relative;overflow:hidden}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:30px 30px;opacity:.20;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 70%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 70%);
}
.site-footer .shell{position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px;padding:60px 0 40px}
.footer-brand .brand{color:#fff}
.footer-brand .brand:hover{color:#fff}
.footer-brand .brand-mark{background:var(--brand-500)}
.footer-brand .f-desc{margin-top:16px;font-size:14px;line-height:1.8;color:#9FB0C8;max-width:34em}
.footer-col h3{font-size:14px;font-weight:600;color:#fff;letter-spacing:.02em;margin-bottom:16px}
.footer-col ul{display:grid;gap:11px}
.footer-col a,.footer-col span{font-size:14px;color:#9FB0C8}
.footer-col a:hover{color:#fff}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.10);padding:20px 0 28px;font-size:13px;color:#7E8DA6;
}
.footer-bottom a{color:#7E8DA6}
.footer-bottom a:hover{color:#fff}
@media(max-width:991px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media(max-width:575px){.footer-grid{grid-template-columns:1fr;gap:26px;padding:44px 0 30px}}

/* 图片兜底 */
.img-fallback{background:var(--brand-050) radial-gradient(rgba(31,95,168,.18) 1px,transparent 1px);background-size:14px 14px}

/* roulang page: category1 */
:root{
  --brand-600:#1F5FA8;
  --brand-700:#17427A;
  --brand-500:#2E7BD6;
  --brand-050:#EDF4FD;
  --accent-500:#F2913D;
  --accent-600:#E07A22;
  --star-400:#7A6BE8;
  --ink-900:#101E33;
  --ink-600:#4A5A72;
  --ink-400:#7A879B;
  --page:#F6F8FB;
  --card:#FFFFFF;
  --line:#E3E9F2;
  --danger:#D0483C;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --sh-1:0 1px 2px rgba(16,30,51,.05),0 8px 24px rgba(16,30,51,.07);
  --sh-2:0 12px 32px rgba(16,30,51,.10);
  --shell:1240px;
  --t:220ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-900);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color var(--t);}
a:hover{color:var(--brand-700);}
ul{list-style:none;margin:0;padding:0;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 24px;}
@media (min-width:1400px){.shell{max-width:1280px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t);
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(16,30,51,.08);}
.header-inner{display:flex;align-items:center;gap:28px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink-900);flex:0 0 auto;}
.brand:hover{color:var(--brand-700);}
.brand-mark{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand-600),var(--brand-500));
  color:#fff;flex:0 0 auto;
}
.brand-mark svg{width:17px;height:17px;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:6px;}
.main-nav a{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-600);padding:6px 0;
}
.main-nav a::after{
  content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;
  background:var(--brand-600);border-radius:2px;transition:left var(--t),right var(--t);
}
.main-nav a:hover{color:var(--brand-700);}
.main-nav a:hover::after,.main-nav a.active::after{left:0;right:0;}
.main-nav a.active{color:var(--brand-700);font-weight:600;}
.header-tools{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search-box{
  position:relative;display:flex;align-items:center;
  width:220px;height:40px;border-radius:999px;
  background:#F1F5FA;border:1px solid var(--line);
  transition:border-color var(--t),box-shadow var(--t),background var(--t);
}
.search-box svg{width:16px;height:16px;color:var(--ink-400);margin-left:14px;flex:0 0 auto;}
.search-box input{
  border:0;background:transparent;outline:none;width:100%;
  padding:0 14px 0 8px;font-size:14px;color:var(--ink-900);
}
.search-box input::placeholder{color:var(--ink-400);}
.search-box:focus-within{background:#fff;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(46,123,214,.16);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;border:1.5px solid transparent;
  cursor:pointer;transition:all var(--t);white-space:nowrap;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px;}
.btn-primary{background:var(--brand-600);color:#fff;border-color:var(--brand-600);}
.btn-primary:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{background:#fff;color:var(--brand-600);border-color:var(--brand-600);}
.btn-outline:hover{background:var(--brand-050);color:var(--brand-700);border-color:var(--brand-700);}
.btn-accent{background:var(--accent-500);color:#fff;border-color:var(--accent-500);}
.btn-accent:hover{background:var(--accent-600);border-color:var(--accent-600);color:#fff;transform:translateY(-1px);}
.btn-ghost{background:transparent;color:var(--ink-600);border-color:transparent;}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-700);}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:#fff;color:var(--ink-900);align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:#fff;padding:16px 24px 22px;
}
.mobile-drawer.open{display:block;}
.mobile-drawer a{
  display:block;padding:12px 4px;font-size:15px;color:var(--ink-600);border-bottom:1px solid var(--line);
}
.mobile-drawer a.active{color:var(--brand-700);font-weight:600;}
.drawer-actions{display:flex;gap:12px;margin-top:18px;}
.drawer-actions .btn{flex:1;}

/* ---------- page head ---------- */
.page-head{
  position:relative;overflow:hidden;
  background:
    radial-gradient(circle at 88% 12%,rgba(122,107,232,.10),transparent 42%),
    radial-gradient(circle at 8% 88%,rgba(46,123,214,.10),transparent 40%),
    #FFFFFF;
  border-bottom:1px solid var(--line);
  padding:44px 0 40px;
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(31,95,168,.14) 1px,transparent 1px);
  background-size:22px 22px;
}
.page-head .shell{position:relative;z-index:1;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-400);margin-bottom:16px;}
.crumbs a{color:var(--ink-600);}
.crumbs a:hover{color:var(--brand-600);}
.crumbs span.sep{color:#C3CCDA;}
.page-head h1{
  font-size:clamp(28px,4vw,44px);font-weight:700;letter-spacing:-.01em;line-height:1.22;
  max-width:820px;
}
.page-head .lede{margin-top:14px;font-size:16px;color:var(--ink-600);max-width:760px;}
.stat-row{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:14px;margin-top:28px;
}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:16px 18px;box-shadow:var(--sh-1);
}
.stat strong{
  display:block;font-size:26px;font-weight:700;color:var(--brand-700);
  letter-spacing:-.01em;line-height:1.2;
}
.stat span{display:block;margin-top:6px;font-size:13px;color:var(--ink-400);}

/* ---------- sections ---------- */
.section{padding:72px 0;}
.section.tight{padding:56px 0;}
.section-head{margin-bottom:32px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--brand-600);background:var(--brand-050);border-radius:999px;padding:5px 12px;
}
.section-head h2{
  margin-top:14px;font-size:clamp(22px,2.4vw,29px);font-weight:700;letter-spacing:-.01em;
}
.section-head p{margin-top:10px;font-size:15px;color:var(--ink-600);max-width:720px;}

/* ---------- entry list ---------- */
.entry-list{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);overflow:hidden;
}
.entry{
  display:grid;grid-template-columns:240px 1fr;gap:24px;
  padding:22px 26px;border-bottom:1px solid var(--line);
  transition:background var(--t),box-shadow var(--t);
}
.entry:last-child{border-bottom:0;}
.entry:hover{background:#FBFCFE;}
.entry-thumb{
  width:100%;aspect-ratio:4/3;border-radius:var(--r-md);overflow:hidden;
  background:var(--brand-050);position:relative;
}
.entry-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 420ms ease;}
.entry:hover .entry-thumb img{transform:scale(1.04);}
.entry-body{display:flex;flex-direction:column;justify-content:center;min-width:0;}
.entry-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:10px;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:6px;
  font-size:12px;font-weight:600;background:var(--brand-050);color:var(--brand-700);
}
.badge.star{background:#F2F0FE;color:#5A4BD1;border:1px solid rgba(122,107,232,.35);}
.badge.warm{background:#FDF1E6;color:var(--accent-600);}
.time{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--ink-400);}
.time::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--ink-400);opacity:.7;}
.entry h3{
  font-size:18px;font-weight:600;line-height:1.5;
}
.entry h3 a{color:var(--ink-900);text-decoration:underline;text-decoration-color:transparent;text-underline-offset:3px;}
.entry h3 a:hover{color:var(--brand-600);text-decoration-color:var(--brand-600);}
.entry p{margin-top:8px;font-size:14.5px;color:var(--ink-600);line-height:1.75;}
.entry-foot{margin-top:14px;display:flex;align-items:center;gap:8px;font-size:13.5px;font-weight:600;color:var(--brand-600);}
.entry-foot svg{width:15px;height:15px;transition:transform var(--t);}
.entry:hover .entry-foot svg{transform:translateX(3px);}

/* ---------- steps ---------- */
.steps{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;
}
.step{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px 22px 24px;box-shadow:var(--sh-1);transition:all var(--t);
}
.step:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--brand-050);}
.step .num{
  font-size:26px;font-weight:700;color:var(--brand-050);letter-spacing:-.02em;line-height:1;
  -webkit-text-stroke:1px rgba(31,95,168,.35);
}
.step h3{margin-top:12px;font-size:17px;font-weight:600;}
.step p{margin-top:8px;font-size:14px;color:var(--ink-600);line-height:1.7;}
.step::after{
  content:"";position:absolute;left:0;top:22px;width:4px;height:calc(100% - 44px);
  background:var(--brand-600);border-radius:0 4px 4px 0;opacity:.85;
}

/* ---------- dark band ---------- */
.dark-band{
  position:relative;overflow:hidden;color:#EAF1FA;
  background:#0F1B2D;
}
.dark-band::before{
  content:"";position:absolute;inset:0;
  background-image:
    radial-gradient(circle at 78% 18%,rgba(122,107,232,.22),transparent 46%),
    radial-gradient(circle at 12% 82%,rgba(46,123,214,.26),transparent 44%),
    url("/assets/images/backpic/back-2.webp");
  background-size:auto,auto,cover;
  background-position:center,center,center;
  opacity:.42;
}
.dark-band::after{
  content:"";position:absolute;inset:0;opacity:.25;
  background-image:radial-gradient(rgba(255,255,255,.35) 1px,transparent 1px);
  background-size:26px 26px;
}
.dark-inner{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:44px;padding:74px 0;align-items:center;}
.dark-inner h2{font-size:clamp(22px,2.4vw,29px);font-weight:700;color:#fff;letter-spacing:-.01em;}
.dark-inner .dark-lede{margin-top:14px;font-size:15px;color:#B9C8DB;max-width:520px;}
.dark-actions{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap;}
.dark-metrics{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.metric{
  border:1px solid rgba(255,255,255,.14);border-radius:var(--r-md);
  padding:20px;background:rgba(255,255,255,.05);
  transition:border-color var(--t),background var(--t);
}
.metric:hover{border-color:rgba(242,145,61,.55);background:rgba(255,255,255,.08);}
.metric strong{display:block;font-size:30px;font-weight:700;color:var(--accent-500);line-height:1.15;letter-spacing:-.01em;}
.metric span{display:block;margin-top:8px;font-size:13.5px;color:#B9C8DB;}

/* ---------- faq ---------- */
.faq{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);overflow:hidden;}
.faq-item + .faq-item{border-top:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 26px;background:transparent;border:0;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink-900);cursor:pointer;transition:background var(--t),color var(--t);
}
.faq-q:hover{background:#FBFCFE;}
.faq-item.open .faq-q{color:var(--brand-700);}
.faq-icon{
  position:relative;flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1.5px solid var(--line);transition:all var(--t);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-600);border-radius:2px;
  transform:translate(-50%,-50%);transition:opacity var(--t),background var(--t);
}
.faq-icon::before{width:11px;height:1.6px;}
.faq-icon::after{width:1.6px;height:11px;}
.faq-item.open .faq-icon{background:var(--brand-050);border-color:var(--brand-600);}
.faq-item.open .faq-icon::after{opacity:0;}
.faq-a{
  display:grid;grid-template-rows:0fr;transition:grid-template-rows 280ms ease;
}
.faq-a > div{overflow:hidden;}
.faq-a p{padding:0 26px 22px;font-size:15px;line-height:1.8;color:var(--ink-600);max-width:900px;}
.faq-item.open .faq-a{grid-template-rows:1fr;}

/* ---------- cta strip ---------- */
.cta-strip{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:26px 30px;
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
}
.cta-strip h2{font-size:20px;font-weight:700;}
.cta-strip p{margin-top:8px;font-size:14.5px;color:var(--ink-600);}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:60px 0 26px;margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;}
.footer-brand .brand{margin-bottom:16px;}
.f-desc{font-size:14px;color:var(--ink-600);line-height:1.75;max-width:340px;}
.footer-col h3{font-size:14px;font-weight:600;color:var(--ink-900);margin-bottom:16px;}
.footer-col li{margin-bottom:11px;}
.footer-col a,.footer-col span{font-size:14px;color:var(--ink-600);}
.footer-col a:hover{color:var(--brand-600);}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--ink-400);}
.footer-bottom a{font-size:13px;color:var(--ink-400);}
.footer-bottom a:hover{color:var(--brand-600);}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .main-nav{gap:20px;}
  .search-box{width:180px;}
}
@media (max-width:991px){
  .main-nav,.search-box,.header-tools .btn-ghost{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-inner{gap:16px;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .dark-inner{grid-template-columns:1fr;gap:32px;padding:60px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:767px){
  .shell{padding:0 16px;}
  .section{padding:48px 0;}
  .section.tight{padding:40px 0;}
  .page-head{padding:32px 0 30px;}
  .stat-row{grid-template-columns:1fr 1fr;}
  .entry{grid-template-columns:1fr;gap:16px;padding:20px;}
  .entry-thumb{aspect-ratio:16/9;}
  .entry h3{font-size:17px;}
  .cta-strip{padding:22px;flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1;}
  .faq-q{padding:18px 20px;font-size:15px;}
  .faq-a p{padding:0 20px 20px;}
}
@media (max-width:575px){
  .brand-text{font-size:15.5px;}
  .stat-row{grid-template-columns:1fr 1fr;gap:10px;}
  .stat{padding:14px;}
  .stat strong{font-size:22px;}
  .steps{grid-template-columns:1fr;}
  .dark-metrics{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: article */
:root{
  --brand-600:#1F5FA8;
  --brand-700:#17427A;
  --brand-500:#2E7BD6;
  --brand-050:#EDF4FD;
  --accent-500:#F2913D;
  --accent-600:#E07A22;
  --star-400:#7A6BE8;
  --ink-900:#101E33;
  --ink-600:#4A5A72;
  --ink-400:#7A879B;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --border:#E3E9F2;
  --radius-lg:14px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-1:0 1px 2px rgba(16,30,51,.05), 0 8px 24px rgba(16,30,51,.07);
  --shadow-2:0 12px 32px rgba(16,30,51,.10);
  --font-cn:-apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-900);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ink-900);text-decoration:none;transition:color .2s ease, background-color .2s ease;}
a:hover{color:var(--brand-600);}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:none;background:none;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:8px;}
::selection{background:var(--brand-050);color:var(--brand-700);}

.shell{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
@media (min-width:1400px){.shell{max-width:1280px;}}
@media (max-width:575.98px){.shell{padding:0 16px;}}

/* ============ 顶部导航 ============ */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .22s ease;
}
.topbar.is-scrolled{box-shadow:0 6px 22px rgba(16,30,51,.08);}
.nav-shell{display:flex;align-items:center;gap:26px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  color:#fff;box-shadow:0 6px 14px rgba(31,95,168,.24);
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink-900);white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:6px;}
.main-nav a{position:relative;font-size:15px;color:var(--ink-600);padding:22px 0;white-space:nowrap;}
.main-nav a::after{
  content:"";position:absolute;left:50%;right:50%;bottom:16px;height:2px;border-radius:2px;
  background:var(--brand-600);transition:left .22s ease, right .22s ease;
}
.main-nav a:hover,.main-nav a.active{color:var(--brand-700);}
.main-nav a:hover::after,.main-nav a.active::after{left:0;right:0;}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-search{position:relative;display:flex;align-items:center;}
.nav-search input{
  width:220px;height:40px;border-radius:999px;border:1px solid var(--border);
  background:#fff;padding:0 40px 0 38px;font-size:14px;color:var(--ink-900);
  transition:border-color .2s ease, box-shadow .2s ease;
}
.nav-search input::placeholder{color:var(--ink-400);}
.nav-search input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(46,123,214,.16);}
.nav-search .search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--ink-400);display:flex;}
.nav-search .search-icon svg{width:16px;height:16px;}
.nav-search button{position:absolute;right:6px;top:50%;transform:translateY(-50%);width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--brand-600);transition:background-color .2s ease;}
.nav-search button svg{width:15px;height:15px;}
.nav-search button:hover{background:var(--brand-050);color:var(--brand-700);}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);align-items:center;justify-content:center;color:var(--ink-600);}
.nav-toggle svg{width:19px;height:19px;}
.nav-toggle:hover{background:var(--brand-050);color:var(--brand-700);border-color:var(--brand-050);}

/* 按钮 */
.btn-primary,.btn-secondary,.btn-accent,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:background-color .2s ease, color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 6px 16px rgba(31,95,168,.22);}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);background:var(--brand-700);}
.btn-secondary{background:#fff;color:var(--brand-600);border:1.5px solid var(--brand-600);}
.btn-secondary:hover{background:var(--brand-050);color:var(--brand-700);border-color:var(--brand-700);}
.btn-secondary:active{background:#E2EDFB;}
.btn-accent{background:var(--accent-500);color:#fff;box-shadow:0 6px 16px rgba(242,145,61,.24);}
.btn-accent:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);}
.btn-accent:active{transform:translateY(0);}
.btn-ghost{height:40px;padding:0 16px;border-radius:999px;color:var(--ink-600);font-weight:500;font-size:14px;border:1px solid var(--border);background:#fff;}
.btn-ghost:hover{color:var(--brand-700);border-color:var(--brand-050);background:var(--brand-050);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}
.btn-primary.is-on,.btn-secondary.is-on{background:var(--accent-500);border-color:var(--accent-500);color:#fff;}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;left:0;right:0;top:68px;z-index:60;
  background:#fff;border-bottom:1px solid var(--border);
  box-shadow:var(--shadow-2);padding:18px 24px 22px;
  transform:translateY(-10px);opacity:0;pointer-events:none;
  transition:opacity .2s ease, transform .2s ease;
}
.mobile-drawer.open{transform:none;opacity:1;pointer-events:auto;}
.mobile-drawer .drawer-links{display:flex;flex-direction:column;gap:2px;}
.mobile-drawer .drawer-links a{padding:12px 4px;font-size:16px;color:var(--ink-600);border-bottom:1px solid var(--border);}
.mobile-drawer .drawer-links a:last-child{border-bottom:none;}
.mobile-drawer .drawer-links a:hover{color:var(--brand-700);}
.mobile-drawer .drawer-search{position:relative;margin:14px 0 16px;}
.mobile-drawer .drawer-search input{width:100%;height:46px;border-radius:var(--radius-sm);border:1px solid var(--border);padding:0 16px;font-size:15px;}
.mobile-drawer .drawer-search input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(46,123,214,.16);}
.mobile-drawer .drawer-actions{display:flex;gap:12px;}
.mobile-drawer .drawer-actions a{flex:1;}

/* ============ 面包屑与文章头 ============ */
.article-hero{position:relative;overflow:hidden;padding:10px 0 34px;background:linear-gradient(180deg,#F1F6FD 0%, rgba(246,248,251,0) 100%);}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(31,95,168,.12) 1px, transparent 1px);
  background-size:22px 22px;opacity:.55;pointer-events:none;
}
.article-hero .shell{position:relative;z-index:1;}
.breadcrumb-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--ink-400);padding:14px 0 18px;}
.breadcrumb-row a{color:var(--ink-600);}
.breadcrumb-row a:hover{color:var(--brand-600);}
.breadcrumb-row .crumb-sep{color:#C4CEDC;}
.breadcrumb-row .crumb-cur{display:inline-block;max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;vertical-align:bottom;color:var(--ink-400);}
.article-head{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);padding:32px 34px;
}
.badge-cat{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:6px;
  background:var(--brand-050);color:var(--brand-700);font-size:12px;font-weight:600;letter-spacing:.02em;
}
.article-title{
  font-size:clamp(26px,3.4vw,38px);line-height:1.32;font-weight:700;letter-spacing:-.01em;
  margin:16px 0 0;color:var(--ink-900);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.meta-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:18px;font-size:13px;color:var(--ink-400);}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:#C4CEDC;}
.meta-badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:#FFF4E8;color:var(--accent-600);font-size:12px;font-weight:600;
}
.meta-place{display:inline-flex;align-items:center;gap:6px;color:var(--ink-600);font-weight:500;}

/* ============ 正文与侧栏 ============ */
.article-section{padding:6px 0 72px;}
.article-main{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-1);padding:34px 36px;}
.article-body{font-size:16px;line-height:1.85;color:var(--ink-900);}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;font-size:23px;line-height:1.42;font-weight:700;color:var(--ink-900);
  margin:40px 0 16px;padding-left:14px;scroll-margin-top:96px;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;border-radius:4px;background:var(--brand-600);}
.article-body h3{font-size:18.5px;line-height:1.5;font-weight:600;color:var(--ink-900);margin:28px 0 12px;scroll-margin-top:96px;}
.article-body h4{font-size:16.5px;font-weight:600;margin:22px 0 10px;}
.article-body strong{color:var(--ink-900);font-weight:600;}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:2px;}
.article-body a:hover{color:var(--brand-700);}
.article-body ul,.article-body ol{padding-left:22px;margin:0 0 1.2em;line-height:1.9;}
.article-body li{margin-bottom:6px;}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;background:var(--brand-050);
  border-left:4px solid var(--brand-600);border-radius:0 var(--radius-md) var(--radius-md) 0;
  color:var(--ink-600);font-size:15.5px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--radius-md);box-shadow:var(--shadow-1);margin:22px auto;}
.article-body figure{margin:22px 0;}
.article-body figure img{margin:0 auto;}
.article-body figcaption{font-size:13px;color:var(--ink-400);text-align:center;margin-top:8px;}
.article-body table{
  width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--border);
  border-radius:var(--radius-md);overflow:hidden;font-size:15px;margin:22px 0;
}
.article-body th{background:var(--brand-050);color:var(--brand-700);font-weight:600;}
.article-body th,.article-body td{padding:11px 14px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top;}
.article-body tbody tr:nth-child(even) td{background:#FAFBFE;}
.article-body tbody tr:last-child td{border-bottom:none;}
.article-body code{background:var(--brand-050);color:var(--brand-700);padding:2px 6px;border-radius:6px;font-size:14px;}
.article-body iframe{width:100%;border:0;border-radius:var(--radius-md);margin:22px 0;}
.article-body hr{border:none;border-top:1px solid var(--border);margin:32px 0;}

.article-side{position:sticky;top:92px;display:flex;flex-direction:column;gap:18px;}
.side-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-1);padding:20px 20px 18px;}
.side-title{font-size:15px;font-weight:600;color:var(--ink-900);margin:0 0 14px;letter-spacing:.01em;}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-link{
  display:block;font-size:14px;color:var(--ink-600);padding:7px 10px;border-radius:8px;
  border-left:2px solid transparent;line-height:1.6;
  transition:background-color .2s ease, color .2s ease, border-color .2s ease;
}
.toc-link:hover{background:var(--brand-050);color:var(--brand-700);border-left-color:var(--brand-500);}
.side-actions{display:flex;flex-direction:column;gap:10px;}
.side-links{display:flex;flex-direction:column;gap:2px;}
.side-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:14px;color:var(--ink-600);padding:9px 10px;border-radius:8px;
  transition:background-color .2s ease, color .2s ease;
}
.side-link:hover{background:var(--brand-050);color:var(--brand-700);}
.side-link svg{width:14px;height:14px;flex:0 0 auto;color:var(--brand-500);}

/* 文末操作条 */
.post-actions{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:34px;padding:18px 20px;background:#FAFBFE;border:1px solid var(--border);border-radius:var(--radius-md);
}
.post-tags{display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
  background:#fff;border:1px solid var(--border);color:var(--ink-600);font-size:12.5px;
  transition:border-color .2s ease, color .2s ease, background-color .2s ease;
}
.tag:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-050);}
.post-buttons{display:flex;gap:10px;}

/* 前后导航 */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:20px;}
.post-nav-item{
  display:flex;flex-direction:column;gap:6px;padding:16px 18px;background:#fff;
  border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-1);
  transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.post-nav-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--brand-050);}
.pn-label{font-size:12.5px;color:var(--ink-400);}
.pn-title{font-size:15px;font-weight:600;color:var(--ink-900);}
.post-nav-item.is-next{text-align:right;align-items:flex-end;}

/* 相关推荐 */
.related-block{margin-top:38px;}
.block-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px;}
.block-head h2{font-size:20px;font-weight:700;margin:0;color:var(--ink-900);}
.more-link{font-size:14px;color:var(--brand-600);font-weight:500;}
.more-link:hover{color:var(--brand-700);}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.related-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--brand-050);}
.related-card img{width:100%;height:132px;object-fit:cover;background:var(--brand-050);}
.rc-body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:8px;}
.rc-body h3{font-size:16px;font-weight:600;margin:0;line-height:1.45;color:var(--ink-900);}
.related-card:hover .rc-body h3{color:var(--brand-600);}
.rc-body p{font-size:13.5px;color:var(--ink-600);margin:0;line-height:1.7;}

/* 返回栏目入口 */
.back-band{margin-top:34px;}
.back-inner{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:24px 26px;border-radius:20px;background:var(--brand-050);border:1px solid #DCE9FA;
}
.back-inner h2{font-size:19px;font-weight:700;margin:0 0 6px;color:var(--brand-700);}
.back-inner p{margin:0;font-size:14px;color:var(--ink-600);}

/* 移动端折叠卡片 */
.mobile-only-block{display:none;margin-top:26px;}
.mobile-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-1);padding:20px;}
.mobile-card h3{font-size:15px;font-weight:600;margin:0 0 14px;color:var(--ink-900);}
.mobile-actions{display:flex;gap:12px;}

/* 空态 */
.empty-state{text-align:center;padding:52px 20px;}
.empty-icon{
  width:64px;height:64px;margin:0 auto 18px;border-radius:18px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-050);color:var(--brand-600);
}
.empty-icon svg{width:28px;height:28px;}
.empty-title{font-size:20px;font-weight:700;margin:0 0 8px;color:var(--ink-900);}
.empty-desc{font-size:14.5px;color:var(--ink-600);margin:0 auto 22px;max-width:440px;line-height:1.8;}

/* ============ 页脚 ============ */
.site-footer{background:#fff;border-top:1px solid var(--border);padding:56px 0 22px;margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:34px;}
.footer-brand .brand{margin-bottom:2px;}
.f-desc{font-size:14px;color:var(--ink-600);line-height:1.85;margin:14px 0 0;max-width:360px;}
.footer-col h3{font-size:14px;font-weight:600;color:var(--ink-900);margin:0 0 14px;letter-spacing:.02em;}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--ink-600);}
.footer-col a:hover{color:var(--brand-600);}
.footer-col span{font-size:14px;color:var(--ink-600);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  border-top:1px solid var(--border);margin-top:40px;padding-top:20px;font-size:13px;color:var(--ink-400);
}
.footer-bottom p{margin:0;}
.footer-bottom a{color:var(--ink-400);}
.footer-bottom a:hover{color:var(--brand-600);}

@media (max-width:1199.98px){
  .nav-search input{width:170px;}
  .main-nav{gap:20px;}
}
@media (max-width:991.98px){
  .main-nav,.nav-search,.btn-ghost{display:none;}
  .nav-toggle{display:inline-flex;}
  .article-side{display:none;}
  .mobile-only-block{display:block;}
  .article-head{padding:26px 22px;}
  .article-main{padding:26px 22px;}
  .related-grid{grid-template-columns:1fr;}
  .related-card img{height:180px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767.98px){
  .article-section{padding-bottom:52px;}
  .post-nav{grid-template-columns:1fr;}
  .post-nav-item.is-next{text-align:left;align-items:flex-start;}
  .post-actions{flex-direction:column;align-items:flex-start;}
  .post-buttons{width:100%;}
  .post-buttons .btn-primary,.post-buttons .btn-secondary{flex:1;}
  .back-inner{padding:20px;}
  .breadcrumb-row .crumb-cur{max-width:200px;}
}
@media (max-width:575.98px){
  .brand-text{font-size:15.5px;}
  .footer-grid{grid-template-columns:1fr;}
  .article-body h2{font-size:20px;}
  .article-body h3{font-size:17px;}
  .mobile-actions{flex-direction:column;}
}

/* roulang page: category2 */
:root{
  --brand-600:#1F5FA8;
  --brand-700:#17427A;
  --brand-500:#2E7BD6;
  --brand-050:#EDF4FD;
  --accent-500:#F2913D;
  --accent-600:#E07A22;
  --star-400:#7A6BE8;
  --ink-900:#101E33;
  --ink-600:#4A5A72;
  --ink-400:#7A879B;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --line:#E3E9F2;
  --ink-deep:#0F1B2D;
  --radius-lg:14px;
  --radius-md:12px;
  --radius-sm:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(16,30,51,.05), 0 8px 24px rgba(16,30,51,.07);
  --shadow-2:0 12px 32px rgba(16,30,51,.10);
  --shell:1240px;
  --ease:220ms ease;
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-900);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease);}
button{font:inherit;color:inherit;}
h1,h2,h3,h4,p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
input,button,select,textarea{font:inherit;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;}

.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 24px;}
@media (min-width:1400px){:root{--shell:1280px;}}
@media (max-width:575px){.shell{padding:0 16px;}}

.section{padding:80px 0;}
.section--tight{padding:64px 0;}
@media (max-width:991px){.section{padding:64px 0;}.section--tight{padding:52px 0;}}
@media (max-width:575px){.section{padding:52px 0;}.section--tight{padding:44px 0;}}

.sec-head{max-width:780px;margin-bottom:36px;}
.sec-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--brand-600);
  background:var(--brand-050);border-radius:var(--radius-pill);padding:5px 14px;
}
.sec-kicker::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--star-400);}
.sec-title{font-size:30px;font-weight:700;letter-spacing:-.01em;margin-top:16px;line-height:1.35;}
.sec-sub{margin-top:14px;color:var(--ink-600);font-size:15.5px;}
@media (max-width:575px){.sec-title{font-size:24px;}.sec-sub{font-size:15px;}}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  border:1.5px solid transparent;cursor:pointer;
  transition:background-color var(--ease),border-color var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn:active{transform:translateY(1px) scale(.99);}
.btn-main{background:var(--brand-600);color:#fff;}
.btn-main:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(31,95,168,.24);}
.btn-ghost{background:transparent;border-color:var(--brand-600);color:var(--brand-600);}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-700);border-color:var(--brand-700);}
.btn-accent{background:var(--accent-500);color:#fff;}
.btn-accent:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(224,122,34,.24);}
.btn-line{background:#fff;border-color:var(--line);color:var(--ink-600);}
.btn-line:hover{border-color:var(--brand-500);color:var(--brand-600);background:#fff;}
.btn-block{width:100%;}
.btn-lg{height:48px;padding:0 26px;font-size:15.5px;}

/* header */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 22px rgba(16,30,51,.08);}
.header-inner{height:68px;display:flex;align-items:center;gap:26px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:32px;height:32px;border-radius:9px;background:var(--brand-050);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink-900);}
.main-nav{display:flex;align-items:center;gap:28px;margin-right:auto;}
.main-nav a{position:relative;font-size:15px;color:var(--ink-600);padding:24px 0;}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:17px;height:2px;border-radius:2px;
  background:var(--brand-600);transform:scaleX(0);transform-origin:center;transition:transform var(--ease);
}
.main-nav a:hover{color:var(--brand-700);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--brand-700);font-weight:600;}
.main-nav a.active::after{transform:scaleX(1);}
.header-tools{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-search{position:relative;width:220px;}
.nav-search svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--ink-400);}
.nav-search input{
  width:100%;height:40px;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:#F9FBFE;padding:0 14px 0 36px;
  font-size:14px;color:var(--ink-900);transition:border-color var(--ease),box-shadow var(--ease),background-color var(--ease);
}
.nav-search input::placeholder{color:var(--ink-400);}
.nav-search input:focus{background:#fff;border-color:var(--brand-500);box-shadow:0 0 0 2px rgba(46,123,214,.35);outline:none;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:#fff;align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle svg{width:20px;height:20px;color:var(--ink-600);}

@media (max-width:1199px){
  .nav-search{width:172px;}
  .header-tools .btn-ghost{display:none;}
  .main-nav{gap:20px;}
  .main-nav a{font-size:14.5px;}
}
@media (max-width:991px){
  .main-nav{display:none;}
  .nav-search{display:none;}
  .header-tools .btn{display:none;}
  .nav-toggle{display:inline-flex;}
}

/* mobile panel */
.mobile-panel{
  position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);z-index:1060;
  background:#fff;border-left:1px solid var(--line);box-shadow:-16px 0 40px rgba(16,30,51,.12);
  transform:translateX(102%);transition:transform var(--ease);
  display:flex;flex-direction:column;padding:20px 20px 24px;
}
.mobile-panel.is-open{transform:translateX(0);}
.mp-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.mp-title{font-size:15px;font-weight:700;color:var(--ink-900);}
.mp-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:#fff;font-size:20px;line-height:1;color:var(--ink-600);cursor:pointer;}
.mp-nav{display:flex;flex-direction:column;gap:4px;padding:16px 0;flex:1;}
.mp-nav a{padding:12px 12px;border-radius:10px;font-size:15px;color:var(--ink-600);}
.mp-nav a:hover{background:var(--brand-050);color:var(--brand-700);}
.mp-nav a.active{background:var(--brand-050);color:var(--brand-700);font-weight:600;}
.mp-actions{display:flex;flex-direction:column;gap:10px;}
.mp-search{position:relative;margin-top:4px;}
.mp-search input{width:100%;height:46px;border-radius:var(--radius-sm);border:1px solid var(--line);padding:0 14px;font-size:14.5px;}
.panel-mask{position:fixed;inset:0;background:rgba(15,27,45,.42);z-index:1050;opacity:0;transition:opacity var(--ease);}
.panel-mask.is-show{opacity:1;}

/* page head */
.page-head{padding:48px 0 8px;}
.breadcrumb-line{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-400);}
.breadcrumb-line a{color:var(--ink-600);}
.breadcrumb-line a:hover{color:var(--brand-600);}
.breadcrumb-line .sep{color:#C3CDDB;}
.breadcrumb-line .current{color:var(--ink-900);font-weight:600;}
.page-title{
  font-size:clamp(28px,4vw,42px);font-weight:700;letter-spacing:-.01em;line-height:1.28;
  margin-top:20px;max-width:900px;
}
.page-lead{margin-top:16px;max-width:760px;font-size:16.5px;color:var(--ink-600);}
.stat-row{
  margin-top:36px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);display:grid;grid-template-columns:repeat(4,1fr);overflow:hidden;
}
.stat{padding:22px 24px;border-right:1px solid var(--line);}
.stat:last-child{border-right:none;}
.stat-num{font-size:28px;font-weight:700;color:var(--brand-700);letter-spacing:-.02em;line-height:1.2;}
.stat-num small{font-size:14px;font-weight:600;color:var(--brand-600);margin-left:2px;}
.stat-label{display:block;margin-top:6px;font-size:13.5px;color:var(--ink-400);}
@media (max-width:991px){.stat-row{grid-template-columns:repeat(2,1fr);}.stat:nth-child(2){border-right:none;}.stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line);}}
@media (max-width:575px){.page-head{padding:32px 0 4px;}.stat{padding:18px 16px;}.stat-num{font-size:24px;}}

/* filter bar */
.filter-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);padding:14px 18px;margin-bottom:28px;
}
.filter-label{font-size:13.5px;color:var(--ink-400);margin-right:4px;}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:#fff;color:var(--ink-600);font-size:14px;font-weight:500;
  cursor:pointer;transition:background-color var(--ease),color var(--ease),border-color var(--ease),transform var(--ease);
}
.chip:hover{border-color:var(--brand-500);color:var(--brand-600);}
.chip:active{transform:translateY(1px);}
.chip.is-active{background:var(--brand-600);border-color:var(--brand-600);color:#fff;font-weight:600;}
.filter-count{margin-left:auto;font-size:13.5px;color:var(--ink-400);}
.filter-count b{color:var(--brand-700);font-weight:700;}
@media (max-width:575px){.filter-count{margin-left:0;width:100%;}}

/* topic grid */
.topic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;}
.topic-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);overflow:hidden;display:flex;flex-direction:column;
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.topic-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:#D5E4F8;}
.topic-media{position:relative;aspect-ratio:16/9;background:var(--brand-050);overflow:hidden;}
.topic-media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms ease;}
.topic-card:hover .topic-media img{transform:scale(1.035);}
.img-fallback{background:var(--brand-050);background-image:radial-gradient(rgba(122,107,232,.35) 1px,transparent 1px);background-size:14px 14px;}
.topic-tag{
  position:absolute;left:14px;top:14px;
  background:rgba(255,255,255,.94);color:var(--brand-700);
  font-size:12px;font-weight:600;border-radius:6px;padding:4px 10px;
  border:1px solid rgba(31,95,168,.16);
}
.topic-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1;}
.topic-body h3{font-size:19px;font-weight:700;line-height:1.45;letter-spacing:-.01em;}
.topic-body h3 a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;}
.topic-sum{margin-top:12px;font-size:15px;color:var(--ink-600);line-height:1.75;flex:1;}
.topic-meta{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--ink-400);
}
.badge-cat{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:6px;
  background:var(--brand-050);color:var(--brand-700);font-size:12px;font-weight:600;
}
.dot-time{display:inline-flex;align-items:center;gap:6px;}
.dot-time::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--ink-400);display:inline-block;}
.topic-more{margin-left:auto;color:var(--brand-600);font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.topic-more svg{width:15px;height:15px;transition:transform var(--ease);}
.topic-card:hover .topic-more svg{transform:translateX(3px);}
@media (max-width:767px){.topic-grid{grid-template-columns:1fr;gap:20px;}}

/* data band */
.data-band{
  position:relative;border-radius:20px;overflow:hidden;
  background:#0F1B2D url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  padding:56px 48px;
}
.data-band::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(15,27,45,.94),rgba(15,27,45,.88));
}
.data-band::after{
  content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:radial-gradient(rgba(122,107,232,.5) 1px,transparent 1px);
  background-size:22px 22px;
  -webkit-mask-image:linear-gradient(120deg,rgba(0,0,0,.9),transparent 70%);
  mask-image:linear-gradient(120deg,rgba(0,0,0,.9),transparent 70%);
}
.data-band > *{position:relative;z-index:2;}
.band-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:center;}
.band-title{font-size:29px;font-weight:700;color:#fff;letter-spacing:-.01em;line-height:1.35;}
.band-text{margin-top:16px;font-size:15.5px;color:rgba(255,255,255,.74);}
.band-points{margin-top:24px;display:flex;flex-wrap:wrap;gap:10px;}
.band-point{
  font-size:13px;color:#DCE7F6;border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius-pill);padding:6px 14px;background:rgba(255,255,255,.04);
}
.meter-list{display:flex;flex-direction:column;gap:22px;}
.meter-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;}
.meter-name{font-size:14.5px;color:#E7EEF8;font-weight:500;}
.meter-val{font-size:16px;font-weight:700;color:var(--accent-500);letter-spacing:-.01em;}
.meter-track{margin-top:10px;height:8px;border-radius:var(--radius-pill);background:rgba(255,255,255,.12);overflow:hidden;}
.meter-fill{display:block;height:100%;border-radius:var(--radius-pill);background:linear-gradient(90deg,var(--brand-500),#5B9BE6);}
@media (max-width:991px){.band-grid{grid-template-columns:1fr;gap:34px;}.data-band{padding:40px 28px;}.band-title{font-size:24px;}}
@media (max-width:575px){.data-band{padding:32px 20px;border-radius:16px;}}

/* steps */
.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px 22px;box-shadow:var(--shadow-1);
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.step:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:#D5E4F8;}
.step-num{
  font-size:24px;font-weight:700;color:#C6D8EE;letter-spacing:-.02em;line-height:1;
}
.step h3{margin-top:14px;font-size:17px;font-weight:700;}
.step p{margin-top:10px;font-size:14.5px;color:var(--ink-600);}
@media (max-width:991px){.step-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:575px){.step-grid{grid-template-columns:1fr;gap:16px;}}

/* scenes */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.scene{
  display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;box-shadow:var(--shadow-1);border-left:4px solid var(--brand-500);
  transition:box-shadow var(--ease),transform var(--ease);
}
.scene:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.scene-icon{
  flex:0 0 44px;width:44px;height:44px;border-radius:12px;background:var(--brand-050);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;
}
.scene-icon svg{width:21px;height:21px;}
.scene h3{font-size:17px;font-weight:700;}
.scene p{margin-top:8px;font-size:14.5px;color:var(--ink-600);}
@media (max-width:767px){.scene-grid{grid-template-columns:1fr;gap:18px;}}

/* faq */
.faq-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item.is-open{border-color:#D5E4F8;box-shadow:var(--shadow-2);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:transparent;border:none;text-align:left;cursor:pointer;
  padding:20px 22px;font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.5;
}
.faq-item.is-open .faq-q{color:var(--brand-700);}
.faq-icon{
  position:relative;flex:0 0 28px;width:28px;height:28px;border-radius:50%;
  border:1px solid var(--line);transition:background-color var(--ease),border-color var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-600);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:12px;height:2px;}
.faq-icon::after{width:2px;height:12px;transition:transform var(--ease),opacity var(--ease);}
.faq-item.is-open .faq-icon{background:var(--brand-050);border-color:var(--brand-050);}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height 320ms ease;}
.faq-a p{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--ink-600);}
.faq-item.is-open .faq-a{max-height:360px;}
@media (max-width:991px){.faq-wrap{grid-template-columns:1fr;gap:28px;}}

/* cta */
.cta-band{
  background:var(--brand-050);border:1px solid #D9E7FA;border-radius:20px;
  padding:34px 40px;display:flex;align-items:center;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:22px;font-weight:700;letter-spacing:-.01em;}
.cta-band p{margin-top:8px;font-size:14.5px;color:var(--ink-600);max-width:620px;}
.cta-actions{margin-left:auto;display:flex;gap:12px;flex-wrap:wrap;}
@media (max-width:767px){
  .cta-band{padding:26px 22px;border-radius:16px;}
  .cta-actions{margin-left:0;width:100%;}
  .cta-actions .btn{flex:1 1 150px;}
}

/* footer */
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:24px;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding:64px 0 44px;
}
.footer-brand .brand{margin-bottom:16px;}
.f-desc{font-size:14px;color:var(--ink-600);max-width:340px;line-height:1.8;}
.footer-col h3{font-size:14px;font-weight:600;color:var(--ink-900);margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a,.footer-col span{font-size:14px;color:var(--ink-600);}
.footer-col a:hover{color:var(--brand-600);}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--ink-400);}
.footer-bottom a{color:var(--ink-400);}
.footer-bottom a:hover{color:var(--brand-600);}
@media (max-width:991px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 36px;}}
@media (max-width:575px){.footer-grid{grid-template-columns:1fr;gap:26px;}}