/* roulang page: index */
:root{
  --brand:#1b5fbe;
  --brand-dark:#12458f;
  --brand-deep:#0f1e36;
  --brand-soft:#eaf2fd;
  --accent:#12a594;
  --accent-soft:#e6f7f4;
  --ink:#16233a;
  --muted:#5b6b85;
  --bg:#f6f9fd;
  --surface:#ffffff;
  --line:#e3eaf4;
  --radius-lg:16px;
  --radius:12px;
  --radius-sm:10px;
  --shadow-xs:0 1px 2px rgba(20,45,85,.05);
  --shadow-sm:0 4px 14px rgba(20,45,85,.07);
  --shadow-md:0 14px 36px rgba(20,45,85,.12);
  --container:1160px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:15.5px;
  line-height:1.78;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;transition:color .2s ease;}
a:hover{color:var(--brand);}
p{margin:0 0 12px;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.2px;line-height:1.32;}
:focus-visible{outline:3px solid rgba(27,95,190,.35);outline-offset:3px;border-radius:8px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-stuck{box-shadow:0 6px 20px rgba(20,45,85,.09);}
.header-bar{display:flex;align-items:center;gap:20px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand),#3b86e0);
  color:#fff;font-size:18px;box-shadow:0 6px 16px rgba(27,95,190,.28);
}
.brand-text{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:.5px;}
.brand-text em{font-style:normal;color:var(--brand);}
.icon-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.icon-nav-item{
  display:flex;align-items:center;gap:7px;
  padding:8px 14px;border-radius:999px;
  font-size:14px;font-weight:500;color:var(--muted);
  transition:all .2s ease;
}
.icon-nav-item i{font-size:15px;}
.icon-nav-item:hover{color:var(--brand);background:var(--brand-soft);}
.icon-nav-item.active{color:var(--brand);background:var(--brand-soft);font-weight:600;}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.nav-toggle{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:#fff;color:var(--ink);font-size:19px;line-height:1;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle:hover{border-color:#c7dbf5;color:var(--brand);}
.mobile-nav{border-top:1px solid var(--line);background:#fff;box-shadow:var(--shadow-sm);}
.mobile-nav .container{padding:14px 20px 20px;display:grid;gap:6px;}
.mobile-link{
  display:flex;align-items:center;gap:10px;
  padding:12px 14px;border-radius:10px;font-size:15px;color:var(--muted);font-weight:500;
}
.mobile-link i{font-size:17px;}
.mobile-link.active,.mobile-link:hover{background:var(--brand-soft);color:var(--brand);}

/* ============ Buttons ============ */
.btn{
  border-radius:10px;font-weight:600;font-size:15px;
  padding:11px 22px;border:1px solid transparent;
  transition:all .2s ease;display:inline-flex;align-items:center;justify-content:center;gap:8px;
}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(27,95,190,.24);}
.btn-brand:hover,.btn-brand:focus{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(27,95,190,.3);}
.btn-brand:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--brand);border-color:#c7dbf5;}
.btn-ghost:hover,.btn-ghost:focus{background:var(--brand-soft);color:var(--brand-dark);border-color:#a9c9ef;transform:translateY(-2px);}
.btn-light-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.5);}
.btn-light-ghost:hover{background:#fff;color:var(--brand-dark);}
.btn-sm{padding:8px 16px;font-size:13.5px;border-radius:9px;}
.btn-lg{padding:13px 30px;font-size:16px;border-radius:11px;}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:66px 0 78px;background:#eef4fd;}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;opacity:.5;
}
.hero-overlay{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(247,250,255,.88) 0%,rgba(247,250,255,.93) 55%,#f6f9fd 100%);
}
.hero-inner{position:relative;z-index:2;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid #d6e5f9;color:var(--brand);
  font-size:13px;font-weight:600;padding:7px 16px;border-radius:999px;
  box-shadow:var(--shadow-xs);margin-bottom:20px;
}
.hero h1{
  font-size:clamp(28px,4.1vw,44px);
  letter-spacing:-.6px;margin-bottom:18px;
  color:#10203a;
}
.hero h1 .hl{color:var(--brand);}
.hero-lead{
  max-width:780px;margin:0 auto 28px;
  font-size:16px;color:#41536d;line-height:1.85;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-bottom:22px;}
.pill-list{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;}
.pill{
  background:#fff;border:1px solid var(--line);color:#42566f;
  font-size:13px;font-weight:500;padding:6px 14px;border-radius:999px;
  box-shadow:var(--shadow-xs);
}
.pill i{color:var(--accent);margin-right:5px;}
.hero-reel{
  display:flex;gap:18px;justify-content:center;
  margin-top:46px;overflow-x:auto;padding:4px 4px 14px;
  scrollbar-width:thin;
}
.reel-card{
  position:relative;flex:0 0 196px;width:196px;aspect-ratio:9/16;
  border-radius:18px;overflow:hidden;background:#dce8f8;
  box-shadow:var(--shadow-md);transition:transform .25s ease,box-shadow .25s ease;
}
.reel-card:hover{transform:translateY(-5px);}
.reel-card img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.reel-card:hover img{transform:scale(1.05);}
.reel-shade{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,25,50,0) 38%,rgba(10,25,50,.82) 100%);
}
.reel-play{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:46px;height:46px;border-radius:50%;background:rgba(255,255,255,.9);
  display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:19px;
  box-shadow:0 8px 20px rgba(10,30,60,.28);
}
.reel-time{
  position:absolute;top:12px;right:12px;
  background:rgba(15,30,54,.62);color:#fff;font-size:11.5px;
  padding:2px 8px;border-radius:999px;letter-spacing:.4px;
}
.reel-title{
  position:absolute;left:14px;right:14px;bottom:14px;
  color:#fff;font-size:13.5px;font-weight:600;line-height:1.5;
}
.reel-title span{display:block;font-size:11.5px;font-weight:400;opacity:.78;margin-top:4px;}

/* ============ Sections ============ */
.section{padding:74px 0;}
.section--alt{background:#eff4fb;}
.section--tint{background:var(--brand-soft);}
.section--deep{background:linear-gradient(125deg,#12386f 0%,#1b5fbe 100%);color:#fff;}
.section-head{max-width:760px;margin-bottom:34px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:1.4px;color:var(--brand);
  text-transform:uppercase;margin-bottom:12px;
}
.kicker i{font-size:15px;}
.section-head h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:12px;}
.section-head p{color:var(--muted);font-size:15px;line-height:1.8;}
.section--deep .section-head h2{color:#fff;}
.section--deep .section-head p{color:rgba(255,255,255,.78);}
.section--deep .kicker{color:#9cc4f7;}

/* ============ Trust strip ============ */
.trust-strip{background:#fff;border-bottom:1px solid var(--line);padding:26px 0;}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.trust-item{display:flex;align-items:center;gap:12px;}
.trust-item i{
  width:40px;height:40px;border-radius:11px;flex-shrink:0;
  background:var(--brand-soft);color:var(--brand);font-size:18px;
  display:flex;align-items:center;justify-content:center;
}
.trust-item strong{display:block;font-size:14.5px;color:var(--ink);}
.trust-item span{display:block;font-size:12.5px;color:var(--muted);line-height:1.5;}

/* ============ Feature layout ============ */
.feature-layout{display:grid;grid-template-columns:.82fr 1.18fr;gap:44px;align-items:start;}
.feature-intro h2{font-size:clamp(22px,2.5vw,29px);margin-bottom:14px;}
.feature-intro p{color:var(--muted);font-size:15px;}
.feature-intro .mini-note{
  margin-top:22px;padding:16px 18px;border-left:3px solid var(--brand);
  background:#fff;border-radius:0 var(--radius) var(--radius) 0;
  font-size:13.5px;color:#42566f;box-shadow:var(--shadow-xs);
}
.feature-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.card-soft{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:24px;
  box-shadow:var(--shadow-sm);height:100%;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card-soft:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c8ddf7;}
.icon-box{
  width:44px;height:44px;border-radius:12px;
  background:var(--brand-soft);color:var(--brand);font-size:20px;
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.icon-box.accent{background:var(--accent-soft);color:var(--accent);}
.card-soft h3{font-size:16.5px;margin-bottom:9px;}
.card-soft p{font-size:14px;color:var(--muted);line-height:1.75;}

/* ============ Scene bento ============ */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.scene-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;box-shadow:var(--shadow-sm);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  display:flex;flex-direction:column;gap:10px;
}
.scene-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c8ddf7;}
.scene-item--wide{grid-column:span 2;background:linear-gradient(120deg,#ffffff,#f3f8ff);}
.scene-item h3{font-size:16.5px;}
.scene-item p{font-size:14px;color:var(--muted);}
.scene-tag{
  align-self:flex-start;font-size:12px;font-weight:600;color:var(--accent);
  background:var(--accent-soft);padding:3px 10px;border-radius:999px;
}

/* ============ Steps ============ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.step{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:28px 24px 24px;
  box-shadow:var(--shadow-sm);transition:transform .22s ease,box-shadow .22s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
.step-num{
  font-size:34px;font-weight:800;color:#d6e5f9;line-height:1;margin-bottom:12px;
}
.step h3{font-size:17px;margin-bottom:9px;}
.step p{font-size:14px;color:var(--muted);}

/* ============ Stage ============ */
.stage{display:grid;grid-template-columns:1.55fr 1fr;gap:20px;align-items:stretch;}
.stage figure{margin:0;position:relative;overflow:hidden;border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);border:1px solid var(--line);background:#dbe7f7;}
.stage img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.stage figure:hover img{transform:scale(1.04);}
.stage-main{grid-row:span 2;min-height:340px;}
.stage-side{display:grid;grid-template-rows:1fr 1fr;gap:20px;}
.stage-side figure{min-height:160px;}
.stage figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:16px 18px;
  background:linear-gradient(180deg,rgba(9,24,48,0),rgba(9,24,48,.82));
  color:#fff;font-size:13.5px;font-weight:500;line-height:1.6;
}
.stage figcaption span{display:block;font-size:12px;font-weight:400;opacity:.8;margin-top:3px;}

/* ============ Metrics ============ */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;}
.metric{padding:20px 10px;border-radius:var(--radius);background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);}
.metric strong{display:block;font-size:32px;font-weight:800;color:#fff;letter-spacing:-1px;}
.metric span{display:block;font-size:13px;color:rgba(255,255,255,.78);margin-top:6px;}

/* ============ Reviews ============ */
.review-head{display:grid;grid-template-columns:1.4fr .6fr;gap:30px;align-items:center;margin-bottom:32px;}
.score-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;text-align:center;box-shadow:var(--shadow-sm);
}
.score-card strong{display:block;font-size:40px;font-weight:800;color:var(--brand);line-height:1;}
.score-card .stars{color:#f2b23e;font-size:15px;margin:8px 0 6px;letter-spacing:2px;}
.score-card span{font-size:12.5px;color:var(--muted);}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.review-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:14px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c8ddf7;}
.review-card p{font-size:14px;color:#3d4f68;line-height:1.78;}
.review-user{display:flex;align-items:center;gap:10px;margin-top:auto;}
.avatar{
  width:38px;height:38px;border-radius:50%;background:var(--brand-soft);
  color:var(--brand);font-weight:700;font-size:14px;
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.review-user strong{display:block;font-size:13.5px;}
.review-user span{display:block;font-size:12px;color:var(--muted);}

/* ============ Compare table ============ */
.table-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);overflow-x:auto;
}
.compare-table{width:100%;border-collapse:collapse;min-width:640px;}
.compare-table th,.compare-table td{padding:16px 20px;text-align:left;font-size:14px;border-bottom:1px solid var(--line);}
.compare-table thead th{
  background:#f4f8fe;font-size:13.5px;color:#33465f;font-weight:700;white-space:nowrap;
}
.compare-table thead th.hl-col{color:var(--brand);background:#e8f1fd;}
.compare-table tbody tr:last-child td{border-bottom:none;}
.compare-table tbody tr:hover{background:#fafcff;}
.compare-table td:first-child{color:#33465f;font-weight:600;}
.cmp-yes{color:var(--accent);font-size:16px;}
.cmp-no{color:#b8c4d6;font-size:16px;}

/* ============ Rail ============ */
.rail{display:flex;gap:20px;overflow-x:auto;padding:4px 4px 16px;scrollbar-width:thin;}
.rail-card{
  flex:0 0 258px;width:258px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.rail-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c8ddf7;}
.rail-thumb{aspect-ratio:16/10;overflow:hidden;background:#dbe7f7;}
.rail-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.rail-card:hover .rail-thumb img{transform:scale(1.06);}
.rail-body{padding:16px 18px 20px;}
.rail-body h3{font-size:15px;margin-bottom:8px;}
.rail-body p{font-size:13px;color:var(--muted);line-height:1.7;}
.rail-tag{
  display:inline-block;font-size:11.5px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);padding:3px 9px;border-radius:999px;margin-bottom:10px;
}

/* ============ Devices ============ */
.device-layout{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;}
.device-btns{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.device-btn{
  display:flex;align-items:center;gap:12px;
  background:#fff;border:1px solid #cfe0f6;border-radius:var(--radius);
  padding:16px 18px;box-shadow:var(--shadow-xs);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  min-height:64px;
}
.device-btn:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:#a9c9ef;color:var(--brand);}
.device-btn i{font-size:22px;color:var(--brand);}
.device-btn strong{display:block;font-size:14.5px;}
.device-btn span{display:block;font-size:12px;color:var(--muted);}

/* ============ Channel grid ============ */
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.channel-card{
  display:block;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:28px 26px;
  box-shadow:var(--shadow-sm);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#b9d4f4;color:inherit;}
.channel-card .icon-box{margin-bottom:18px;}
.channel-card h3{font-size:17px;margin-bottom:8px;}
.channel-card p{font-size:14px;color:var(--muted);margin-bottom:14px;}
.channel-more{font-size:13.5px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
.channel-card:hover .channel-more i{transform:translateX(4px);}
.channel-more i{transition:transform .2s ease;}

/* ============ News ============ */
.news-layout{display:grid;grid-template-columns:1.55fr 1fr;gap:34px;align-items:start;}
.news-main{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-sm);}
.news-main h2{font-size:22px;margin-bottom:6px;}
.news-main .news-sub{font-size:13.5px;color:var(--muted);margin-bottom:18px;}
.news-item{
  display:flex;gap:14px;padding:16px 0;
  border-bottom:1px dashed var(--line);
  transition:padding-left .2s ease;
}
.news-item:last-child{border-bottom:none;padding-bottom:0;}
.news-item:hover{padding-left:6px;}
.news-dot{
  width:38px;height:38px;flex-shrink:0;border-radius:11px;
  background:var(--brand-soft);color:var(--brand);font-size:16px;
  display:flex;align-items:center;justify-content:center;
}
.news-body{display:block;min-width:0;}
.news-title{display:block;font-size:15px;font-weight:600;color:var(--ink);line-height:1.55;margin-bottom:4px;}
.news-item:hover .news-title{color:var(--brand);}
.news-desc{display:block;font-size:13px;color:var(--muted);line-height:1.7;margin-bottom:7px;}
.news-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:#8a99b0;flex-wrap:wrap;}
.tag{
  font-size:11.5px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);padding:2px 9px;border-radius:999px;
}
.dot-sep{width:3px;height:3px;border-radius:50%;background:#c3cee0;display:inline-block;}
.empty-tip{
  font-size:13.5px;color:var(--muted);background:#f7faff;
  border:1px dashed #cddff5;border-radius:10px;padding:18px;text-align:center;
}
.news-side{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow-sm);}
.news-side h3{font-size:16px;margin-bottom:16px;display:flex;align-items:center;gap:8px;}
.news-side h3 i{color:var(--brand);}
.side-list li{padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px;line-height:1.6;}
.side-list li:last-child{border-bottom:none;}
.side-list a{color:#3d4f68;display:flex;gap:9px;}
.side-list a:hover{color:var(--brand);}
.side-list .idx{color:var(--brand);font-weight:700;font-size:13px;flex-shrink:0;}

/* ============ QA ============ */
.qa-list{display:grid;gap:16px;max-width:900px;margin:0 auto;}
.qa-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow-xs);
  transition:box-shadow .2s ease,border-color .2s ease;
}
.qa-item:hover{box-shadow:var(--shadow-sm);border-color:#c8ddf7;}
.qa-q{font-size:15.5px;font-weight:600;color:var(--ink);display:flex;gap:10px;margin-bottom:10px;}
.qa-q i{color:var(--brand);font-size:16px;margin-top:3px;flex-shrink:0;}
.qa-a{font-size:14px;color:var(--muted);line-height:1.8;padding-left:26px;}

/* ============ CTA band ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:linear-gradient(120deg,#0f2f61 0%,#1b5fbe 100%);
  border-radius:22px;padding:52px 44px;color:#fff;
  display:grid;grid-template-columns:1.35fr .65fr;gap:32px;align-items:center;
  box-shadow:0 22px 48px rgba(18,60,120,.28);
}
.cta-band::after{
  content:"";position:absolute;right:-70px;top:-90px;width:280px;height:280px;
  border-radius:50%;background:rgba(255,255,255,.08);
}
.cta-band h2{font-size:clamp(21px,2.4vw,28px);color:#fff;margin-bottom:12px;}
.cta-band p{color:rgba(255,255,255,.82);font-size:14.5px;max-width:560px;}
.cta-actions{display:flex;flex-direction:column;gap:12px;align-items:stretch;}
.cta-actions .btn{width:100%;}

/* ============ Footer ============ */
.site-footer{background:var(--brand-deep);color:#b9c8dc;padding:56px 0 24px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.14);box-shadow:none;}
.footer-brand .brand-text{color:#fff;}
.footer-desc{font-size:13.5px;line-height:1.8;color:#9db0c9;max-width:340px;}
.footer-col h4{font-size:14.5px;color:#fff;margin-bottom:16px;letter-spacing:.4px;}
.footer-links{display:grid;gap:10px;}
.footer-links a{font-size:13.5px;color:#a9bbd2;line-height:1.6;}
.footer-links a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding-top:20px;display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;font-size:12.5px;color:#8296b0;
}
.footer-bottom a{color:#9db0c9;}
.footer-bottom a:hover{color:#fff;}

/* ============ Responsive ============ */
@media (max-width:1024px){
  .section{padding:58px 0;}
  .feature-layout{grid-template-columns:1fr;gap:30px;}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .scene-item--wide{grid-column:span 2;}
  .trust-grid{grid-template-columns:repeat(2,1fr);gap:16px;}
  .review-grid{grid-template-columns:repeat(2,1fr);}
  .review-head{grid-template-columns:1fr;gap:20px;}
  .news-layout{grid-template-columns:1fr;}
  .device-layout{grid-template-columns:1fr;gap:26px;}
  .channel-grid{grid-template-columns:1fr;}
  .cta-band{grid-template-columns:1fr;padding:40px 30px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .stage{grid-template-columns:1fr;}
  .stage-main{grid-row:auto;min-height:260px;}
  .stage-side{grid-template-columns:1fr 1fr;grid-template-rows:auto;}
  .stage-side figure{min-height:150px;}
}
@media (max-width:768px){
  .hero{padding:44px 0 56px;}
  .hero-lead{font-size:15px;}
  .hero-reel{justify-content:flex-start;padding-left:2px;}
  .reel-card{flex:0 0 168px;width:168px;}
  .feature-cards{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .review-grid{grid-template-columns:1fr;}
  .device-btns{grid-template-columns:1fr;}
  .news-main{padding:22px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .section{padding:50px 0;}
  .section-head{margin-bottom:26px;}
  .cta-band{padding:34px 24px;}
}
@media (max-width:520px){
  .brand-text{font-size:16px;}
  .hero h1{font-size:26px;}
  .scene-grid{grid-template-columns:1fr;}
  .scene-item--wide{grid-column:span 1;}
  .trust-grid{grid-template-columns:1fr;}
  .reel-card{flex:0 0 150px;width:150px;}
  .metric strong{font-size:26px;}
  .score-card strong{font-size:34px;}
  .news-item{flex-direction:row;}
  .news-dot{width:32px;height:32px;font-size:14px;}
  .btn-lg{padding:12px 22px;font-size:15px;}
  .qa-item{padding:18px;}
}

/* roulang page: category1 */
:root{
  --brand:#1b5fbe;
  --brand-dark:#12458f;
  --brand-deep:#0f1e36;
  --brand-soft:#eaf2fd;
  --accent:#12a594;
  --accent-soft:#e6f7f4;
  --ink:#16233a;
  --muted:#5b6b85;
  --bg:#f6f9fd;
  --surface:#ffffff;
  --line:#e3eaf4;
  --radius-lg:16px;
  --radius:12px;
  --radius-sm:10px;
  --shadow-xs:0 1px 2px rgba(20,45,85,.05);
  --shadow-sm:0 4px 14px rgba(20,45,85,.07);
  --shadow-md:0 14px 36px rgba(20,45,85,.12);
  --container:1160px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:15.5px;line-height:1.78;color:var(--ink);background:var(--bg);
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;transition:color .2s ease;}
a:hover{color:var(--brand);}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;letter-spacing:-.2px;}
p{margin:0 0 12px;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(27,95,190,.35);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-stuck{box-shadow:0 6px 20px rgba(20,45,85,.09);}
.header-bar{display:flex;align-items:center;gap:20px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand),#3b86e0);color:#fff;font-size:18px;
  box-shadow:0 6px 16px rgba(27,95,190,.28);
}
.brand-text{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:.5px;}
.brand-text em{font-style:normal;color:var(--brand);}
.icon-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.icon-nav-item{
  display:flex;align-items:center;gap:7px;padding:8px 14px;border-radius:999px;
  font-size:14px;font-weight:500;color:var(--muted);transition:all .2s ease;
}
.icon-nav-item i{font-size:15px;}
.icon-nav-item:hover{color:var(--brand);background:var(--brand-soft);}
.icon-nav-item.active{color:var(--brand);background:var(--brand-soft);font-weight:600;}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;margin-left:8px;}
.nav-toggle{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  color:var(--ink);font-size:19px;line-height:1;display:flex;align-items:center;justify-content:center;cursor:pointer;
  transition:all .2s ease;
}
.nav-toggle:hover{border-color:#c7dbf5;color:var(--brand);background:var(--brand-soft);}
.mobile-nav{border-top:1px solid var(--line);background:#fff;box-shadow:var(--shadow-sm);}
.mobile-nav .container{padding:12px 20px 18px;display:grid;gap:6px;}
.mobile-link{
  display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:10px;
  font-size:15px;color:var(--muted);font-weight:500;min-height:44px;
}
.mobile-link i{font-size:17px;}
.mobile-link.active,.mobile-link:hover{background:var(--brand-soft);color:var(--brand);}

/* ===== Buttons ===== */
.btn{
  border-radius:10px;font-weight:600;font-size:15px;padding:11px 22px;border:1px solid transparent;
  transition:all .2s ease;display:inline-flex;align-items:center;justify-content:center;gap:8px;
}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(27,95,190,.24);}
.btn-brand:hover,.btn-brand:focus{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(27,95,190,.3);}
.btn-brand:active{transform:translateY(0);box-shadow:0 6px 14px rgba(27,95,190,.24);}
.btn-ghost{background:#fff;color:var(--brand);border-color:#c7dbf5;}
.btn-ghost:hover,.btn-ghost:focus{background:var(--brand-soft);color:var(--brand-dark);border-color:#a9c9ef;transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-light-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.5);}
.btn-light-ghost:hover,.btn-light-ghost:focus{background:#fff;color:var(--brand-dark);transform:translateY(-2px);}
.btn-sm{padding:8px 16px;font-size:13.5px;border-radius:9px;}
.btn-lg{padding:13px 30px;font-size:16px;border-radius:11px;}

/* ===== Hero ===== */
.page-hero{position:relative;overflow:hidden;padding:58px 0 66px;background:#eef4fd;border-bottom:1px solid var(--line);}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;opacity:.45;}
.hero-veil{position:absolute;inset:0;background:linear-gradient(118deg,#f8fbff 0%,rgba(248,251,255,.95) 44%,rgba(238,244,253,.72) 100%);}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.12fr .88fr;gap:46px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid #d6e5f9;
  color:var(--brand);font-size:13px;font-weight:600;padding:7px 16px;border-radius:999px;
  box-shadow:var(--shadow-xs);margin-bottom:18px;
}
.hero-copy h1{font-size:clamp(27px,3.6vw,40px);color:#10203a;margin-bottom:16px;letter-spacing:-.7px;}
.hero-lead{max-width:560px;font-size:16px;color:#41536d;line-height:1.85;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}
.pill-list{display:flex;flex-wrap:wrap;gap:10px;}
.pill{
  background:#fff;border:1px solid var(--line);color:#42566f;font-size:13px;font-weight:500;
  padding:6px 14px;border-radius:999px;box-shadow:var(--shadow-xs);
}
.pill i{color:var(--accent);margin-right:5px;}
.quick-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-md);overflow:hidden;transition:transform .25s ease,box-shadow .25s ease;
}
.quick-card:hover{transform:translateY(-4px);box-shadow:0 20px 44px rgba(20,45,85,.16);}
.quick-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#dbe8f8;}
.quick-media img{width:100%;height:100%;object-fit:cover;}
.quick-badge{
  position:absolute;left:14px;top:14px;background:rgba(255,255,255,.95);color:var(--brand);
  font-size:12.5px;font-weight:700;padding:5px 12px;border-radius:999px;box-shadow:var(--shadow-xs);
}
.quick-body{padding:16px 20px 18px;}
.quick-row{display:flex;align-items:center;gap:12px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--muted);}
.quick-row:last-child{border-bottom:0;}
.quick-key{flex:0 0 84px;font-weight:700;color:var(--ink);}

/* ===== Sections ===== */
.section{padding:72px 0;}
.section--alt{background:#eff4fb;}
.section--tint{background:var(--brand-soft);}
.section-head{max-width:780px;margin-bottom:34px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-tag{
  display:inline-flex;align-items:center;gap:7px;color:var(--brand);font-size:13px;font-weight:700;
  letter-spacing:1px;margin-bottom:10px;
}
.section-tag::before{content:"";width:22px;height:3px;border-radius:2px;background:var(--brand);}
.section-head h2{font-size:clamp(22px,2.6vw,29px);color:#10203a;margin-bottom:12px;}
.section-head p{color:var(--muted);font-size:15px;margin:0;}

/* ===== Cards ===== */
.card-grid{display:grid;gap:22px;}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr));}
.rule-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);padding:24px 22px;height:100%;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rule-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c9ddf7;}
.card-icon{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-size:20px;margin-bottom:16px;
}
.card-icon.accent{background:var(--accent-soft);color:var(--accent);}
.rule-card h3{font-size:17px;margin-bottom:9px;}
.rule-card p{font-size:14.5px;color:var(--muted);margin-bottom:14px;}
.tag{
  display:inline-block;background:var(--brand-soft);color:var(--brand-dark);font-size:12px;
  font-weight:600;padding:4px 11px;border-radius:999px;
}
.tag.accent{background:var(--accent-soft);color:#0b7a6d;}

/* ===== Terms ===== */
.term-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
.term-item{
  display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:16px 18px;box-shadow:var(--shadow-xs);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.term-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:#c9ddf7;}
.term-name{
  flex:0 0 74px;font-weight:700;font-size:15px;color:var(--brand-dark);
  background:var(--brand-soft);border-radius:8px;text-align:center;padding:5px 0;
}
.term-desc{font-size:14.5px;color:var(--muted);margin:0;}

/* ===== Flow ===== */
.flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;counter-reset:step;}
.flow-step{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 20px 22px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.flow-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c9ddf7;}
.flow-num{
  width:34px;height:34px;border-radius:10px;background:var(--brand);color:#fff;font-weight:700;
  display:flex;align-items:center;justify-content:center;font-size:15px;margin-bottom:14px;
  box-shadow:0 6px 14px rgba(27,95,190,.26);
}
.flow-step h3{font-size:16px;margin-bottom:8px;}
.flow-step p{font-size:14px;color:var(--muted);margin:0;}

/* ===== Table ===== */
.table-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);overflow:hidden;
}
.table-wrap .table{margin:0;}
.draw-table{width:100%;border-collapse:collapse;}
.draw-table thead th{
  background:var(--brand);color:#fff;font-size:14px;font-weight:600;
  padding:14px 18px;text-align:left;white-space:nowrap;border:0;
}
.draw-table tbody td{
  padding:13px 18px;font-size:14.5px;color:#33455f;border-bottom:1px solid var(--line);
  vertical-align:top;
}
.draw-table tbody tr:nth-child(even){background:#f8fbff;}
.draw-table tbody tr:hover{background:var(--brand-soft);}
.draw-table tbody tr:last-child td{border-bottom:0;}
.draw-table td strong{color:var(--brand-dark);}
.table-note{font-size:13px;color:var(--muted);margin:14px 0 0;}

/* ===== Mistakes ===== */
.mistake-list{display:grid;gap:16px;}
.mistake-item{
  display:grid;grid-template-columns:150px 1fr;gap:20px;align-items:start;
  background:#fff;border:1px solid var(--line);border-left:4px solid #e2853f;
  border-radius:var(--radius-sm);padding:18px 22px;box-shadow:var(--shadow-xs);
  transition:box-shadow .2s ease,transform .2s ease;
}
.mistake-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);}
.mistake-wrong{font-weight:700;color:#b4571f;font-size:14.5px;display:flex;align-items:center;gap:8px;}
.mistake-right{font-size:14.5px;color:var(--muted);margin:0;line-height:1.75;}
.mistake-right strong{color:var(--brand-dark);}
.visual-card{
  margin-top:26px;border-radius:var(--radius-lg);overflow:hidden;position:relative;
  box-shadow:var(--shadow-md);border:1px solid var(--line);
}
.visual-card img{width:100%;height:280px;object-fit:cover;}
.visual-cap{
  position:absolute;left:0;right:0;bottom:0;padding:22px 26px;color:#fff;
  background:linear-gradient(180deg,rgba(15,30,54,0) 0%,rgba(15,30,54,.86) 100%);
  font-size:15px;font-weight:600;
}
.visual-cap span{display:block;font-size:13px;font-weight:400;opacity:.85;margin-top:5px;}

/* ===== Audience ===== */
.audience-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-sm);height:100%;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.audience-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c9ddf7;}
.audience-card h3{font-size:17px;margin-bottom:10px;}
.audience-card p{font-size:14.5px;color:var(--muted);margin:0 0 14px;}
.audience-list li{
  font-size:14px;color:#41536d;padding-left:24px;position:relative;margin-bottom:8px;
}
.audience-list li::before{
  content:"\F26E";font-family:"bootstrap-icons";position:absolute;left:0;top:0;
  color:var(--accent);font-size:14px;
}

/* ===== News ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);overflow:hidden;height:100%;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c9ddf7;}
.news-link{display:flex;flex-direction:column;height:100%;padding:22px 22px 18px;}
.news-link h3{font-size:16px;line-height:1.5;margin-bottom:10px;color:var(--ink);}
.news-link:hover h3{color:var(--brand);}
.news-link p{font-size:14px;color:var(--muted);margin-bottom:16px;flex:1 1 auto;}
.news-meta{display:flex;justify-content:space-between;gap:10px;font-size:12.5px;color:#8494ab;border-top:1px dashed var(--line);padding-top:12px;}
.news-empty{color:var(--muted);font-size:15px;}
.news-more{margin-top:26px;text-align:center;}

/* ===== FAQ ===== */
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-xs);overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease;
}
.faq-item[open]{box-shadow:var(--shadow-sm);border-color:#c9ddf7;}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;font-size:16px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"\F64D";font-family:"bootstrap-icons";color:var(--brand);font-size:16px;
  transition:transform .25s ease;flex-shrink:0;
}
.faq-item[open] summary::after{transform:rotate(180deg);}
.faq-item summary:hover{color:var(--brand);}
.faq-body{padding:0 22px 20px;font-size:14.5px;color:var(--muted);line-height:1.8;}

/* ===== CTA ===== */
.cta-band{
  background:linear-gradient(125deg,#12386f 0%,#1b5fbe 100%);
  border-radius:var(--radius-lg);padding:44px 42px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:0 20px 44px rgba(18,56,111,.24);position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;
  background:rgba(255,255,255,.08);
}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);margin-bottom:10px;color:#fff;}
.cta-band p{margin:0;font-size:15px;color:rgba(255,255,255,.85);max-width:620px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex-shrink:0;position:relative;z-index:2;}

/* ===== Footer ===== */
.site-footer{background:#0f1e36;color:#c3d1e5;padding:58px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:38px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{width:34px;height:34px;font-size:17px;box-shadow:none;}
.footer-brand .brand-text{color:#fff;font-size:17px;}
.footer-desc{font-size:14px;color:#93a6c0;line-height:1.8;margin:0;max-width:360px;}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;}
.footer-links{display:grid;gap:10px;}
.footer-links a{font-size:14px;color:#9db0cb;transition:color .2s ease,padding-left .2s ease;display:inline-block;}
.footer-links a:hover{color:#fff;padding-left:4px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0 26px;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:#7f93b1;
}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero-lead{max-width:100%;}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr));}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr;gap:30px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 30px;}
}
@media (max-width:768px){
  .section{padding:52px 0;}
  .page-hero{padding:44px 0 52px;}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .flow{grid-template-columns:1fr;}
  .term-grid{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .mistake-item{grid-template-columns:1fr;gap:10px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:28px;}
  .draw-table thead th,.draw-table tbody td{padding:11px 13px;font-size:13.5px;}
  .visual-card img{height:210px;}
  .cta-band{padding:30px 22px;border-radius:var(--radius);}
  .footer-bottom{flex-direction:column;gap:6px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  body{font-size:15px;}
  .hero-copy h1{font-size:25px;letter-spacing:-.3px;}
  .hero-actions .btn{width:100%;}
  .header-bar{height:60px;gap:12px;}
  .brand-text{font-size:16px;}
  .quick-key{flex:0 0 70px;font-size:13.5px;}
  .rule-card{padding:20px 18px;}
  .section-head h2{font-size:21px;}
  .term-item{flex-direction:column;gap:8px;}
  .term-name{flex:none;padding:4px 14px;display:inline-block;}
  .visual-card img{height:170px;}
  .visual-cap{padding:16px 18px;font-size:14px;}
}

/* roulang page: article */
:root{
 --brand:#1b5fbe;
 --brand-dark:#12458f;
 --brand-deep:#0f1e36;
 --brand-soft:#eaf2fd;
 --accent:#12a594;
 --accent-soft:#e6f7f4;
 --ink:#16233a;
 --muted:#5b6b85;
 --bg:#f6f9fd;
 --surface:#ffffff;
 --line:#e3eaf4;
 --radius-lg:16px;
 --radius:12px;
 --radius-sm:10px;
 --shadow-xs:0 1px 2px rgba(20,45,85,.05);
 --shadow-sm:0 4px 14px rgba(20,45,85,.07);
 --shadow-md:0 14px 36px rgba(20,45,85,.12);
 --container:1160px;
}
html{scroll-behavior:smooth;}
*,*::before,*::after{box-sizing:border-box;}
body{
 margin:0;
 font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
 font-size:15.5px;
 line-height:1.78;
 color:var(--ink);
 background:var(--bg);
 -webkit-font-smoothing:antialiased;
 overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{text-decoration:none;color:inherit;transition:color .2s ease;}
a:hover{color:var(--brand);}
h1,h2,h3,h4,h5,h6,p,figure,blockquote{margin-top:0;}
ul,ol{padding-left:20px;}
a:focus-visible,button:focus-visible,summary:focus-visible{
 outline:2px solid var(--brand);
 outline-offset:3px;
 border-radius:6px;
}
.container{
 width:100%;
 max-width:var(--container);
 margin:0 auto;
 padding:0 20px;
}
/* ============ Header ============ */
.site-header{
 position:sticky;top:0;z-index:1030;
 background:rgba(255,255,255,.94);
 backdrop-filter:blur(12px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-stuck{box-shadow:0 6px 20px rgba(20,45,85,.09);}
.header-bar{display:flex;align-items:center;gap:20px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
 width:36px;height:36px;border-radius:10px;
 display:flex;align-items:center;justify-content:center;
 background:linear-gradient(135deg,var(--brand),#3b86e0);
 color:#fff;font-size:18px;box-shadow:0 6px 16px rgba(27,95,190,.28);
}
.brand-text{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:.5px;}
.brand-text em{font-style:normal;color:var(--brand);}
.icon-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.icon-nav-item{
 display:flex;align-items:center;gap:7px;
 padding:8px 14px;border-radius:999px;
 font-size:14px;font-weight:500;color:var(--muted);
 transition:all .2s ease;
}
.icon-nav-item i{font-size:15px;}
.icon-nav-item:hover{color:var(--brand);background:var(--brand-soft);}
.icon-nav-item.active{color:var(--brand);background:var(--brand-soft);font-weight:600;}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.nav-toggle{
 width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
 background:#fff;color:var(--ink);font-size:19px;line-height:1;
 align-items:center;justify-content:center;cursor:pointer;
 transition:all .2s ease;
}
.nav-toggle:hover{border-color:#c7dbf5;color:var(--brand);}
.mobile-nav{border-top:1px solid var(--line);background:#fff;box-shadow:var(--shadow-sm);}
.mobile-nav .container{padding:14px 20px 20px;display:grid;gap:6px;max-width:var(--container);}
.mobile-link{
 display:flex;align-items:center;gap:10px;
 padding:12px 14px;border-radius:10px;font-size:15px;color:var(--muted);font-weight:500;
 min-height:40px;
}
.mobile-link i{font-size:17px;}
.mobile-link.active,.mobile-link:hover{background:var(--brand-soft);color:var(--brand);}
/* ============ Buttons ============ */
.btn{
 border-radius:10px;font-weight:600;font-size:15px;
 padding:11px 22px;border:1px solid transparent;
 transition:all .2s ease;display:inline-flex;align-items:center;justify-content:center;gap:8px;
 line-height:1.4;
}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(27,95,190,.24);}
.btn-brand:hover,.btn-brand:focus{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(27,95,190,.3);}
.btn-brand:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--brand);border-color:#c7dbf5;}
.btn-ghost:hover,.btn-ghost:focus{background:var(--brand-soft);color:var(--brand-dark);border-color:#a9c9ef;transform:translateY(-2px);}
.btn-light-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.5);}
.btn-light-ghost:hover{background:#fff;color:var(--brand-dark);transform:translateY(-2px);}
.btn-sm{padding:8px 16px;font-size:13.5px;border-radius:9px;}
.btn-lg{padding:13px 30px;font-size:16px;border-radius:11px;}
/* ============ Article hero ============ */
.page-hero{
 position:relative;overflow:hidden;
 padding:40px 0 56px;
 background:linear-gradient(180deg,#eef4fd 0%,#f6f9fd 100%);
 border-bottom:1px solid var(--line);
}
.page-hero::before{
 content:"";position:absolute;right:-160px;top:-190px;
 width:460px;height:460px;border-radius:50%;
 background:radial-gradient(circle,rgba(27,95,190,.14),rgba(27,95,190,0) 70%);
 pointer-events:none;
}
.crumb{
 display:flex;align-items:center;gap:8px;flex-wrap:wrap;
 font-size:13px;color:var(--muted);margin-bottom:20px;
 position:relative;z-index:2;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand);}
.crumb i{font-size:10px;opacity:.55;}
.crumb .current{color:#2c3f5c;font-weight:600;}
.hero-grid{
 position:relative;z-index:2;
 display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,.6fr);
 gap:40px;align-items:center;
}
.kicker{
 display:inline-flex;align-items:center;gap:8px;
 background:#fff;border:1px solid #d6e5f9;color:var(--brand);
 font-size:13px;font-weight:600;padding:6px 15px;border-radius:999px;
 box-shadow:var(--shadow-xs);margin-bottom:16px;
}
.page-hero h1{
 font-size:clamp(24px,3.2vw,36px);
 line-height:1.42;letter-spacing:-.5px;
 color:#10203a;margin:0 0 16px;
}
.page-hero .lead{
 font-size:15.5px;line-height:1.85;color:#41536d;
 max-width:660px;margin:0 0 20px;
}
.meta-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;}
.meta-chip{
 display:inline-flex;align-items:center;gap:6px;
 background:#fff;border:1px solid var(--line);border-radius:999px;
 padding:5px 14px;font-size:13px;color:var(--muted);
 box-shadow:var(--shadow-xs);
}
.meta-chip i{color:var(--brand);font-size:13px;}
.hero-figure{
 margin:0;border-radius:var(--radius-lg);overflow:hidden;
 aspect-ratio:4/3;background:#dce8f8;
 border:1px solid rgba(255,255,255,.8);
 box-shadow:var(--shadow-md);
}
.hero-figure img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
.hero-figure:hover img{transform:scale(1.04);}
/* ============ Sections ============ */
.section{padding:70px 0;}
.section--alt{background:#eff4fb;}
.section--tint{background:var(--brand-soft);}
.section-head{max-width:760px;margin-bottom:32px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-eyebrow{
 display:inline-flex;align-items:center;gap:8px;
 font-size:12.5px;font-weight:700;letter-spacing:1.2px;
 color:var(--brand);margin-bottom:10px;
}
.section-eyebrow::before{content:"";width:18px;height:3px;border-radius:2px;background:var(--brand);}
.section-title{
 font-size:clamp(21px,2.6vw,28px);
 letter-spacing:-.3px;color:#10203a;margin:0 0 10px;line-height:1.45;
}
.section-desc{font-size:15px;color:var(--muted);margin:0;line-height:1.8;}
/* ============ Article body ============ */
.article-section{padding:54px 0 64px;}
.article-wrap{
 max-width:840px;margin:0 auto;
 background:var(--surface);
 border:1px solid var(--line);
 border-radius:var(--radius-lg);
 box-shadow:var(--shadow-sm);
 padding:42px 46px;
}
.article-content{font-size:15.5px;line-height:1.92;color:#26364f;}
.article-content h1,
.article-content h2{
 font-size:22px;line-height:1.5;color:#10203a;
 margin:34px 0 14px;padding-left:14px;
 border-left:4px solid var(--brand);
}
.article-content h1:first-child,
.article-content h2:first-child{margin-top:0;}
.article-content h3{font-size:18px;line-height:1.6;color:#132a4d;margin:26px 0 10px;}
.article-content h4{font-size:16px;color:#132a4d;margin:22px 0 8px;}
.article-content p{margin:0 0 16px;}
.article-content ul,
.article-content ol{margin:0 0 18px;padding-left:22px;}
.article-content li{margin-bottom:8px;}
.article-content strong{color:var(--brand-dark);font-weight:700;}
.article-content a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-content a:hover{color:var(--brand-dark);}
.article-content blockquote{
 margin:24px 0;padding:16px 22px;
 background:var(--brand-soft);color:#2b4266;
 border-left:4px solid var(--brand);
 border-radius:0 var(--radius) var(--radius) 0;
}
.article-content blockquote p:last-child{margin-bottom:0;}
.article-content img{border-radius:var(--radius);margin:22px auto;box-shadow:var(--shadow-sm);}
.article-content figure{margin:24px 0;}
.article-content figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px;}
.article-content table{
 width:100%;border-collapse:collapse;margin:22px 0;
 font-size:14.5px;background:#fff;
 border-radius:var(--radius);overflow:hidden;
}
.article-content th,
.article-content td{border:1px solid var(--line);padding:10px 14px;text-align:left;}
.article-content th{background:var(--brand-soft);color:var(--brand-dark);font-weight:600;}
.article-content hr{border:0;border-top:1px solid var(--line);margin:28px 0;}
.article-empty{text-align:center;padding:54px 20px;}
.article-empty i{font-size:46px;color:#b6c9e4;display:block;margin-bottom:16px;}
.article-empty h2{font-size:22px;color:#10203a;margin:0 0 10px;}
.article-empty p{color:var(--muted);margin:0 0 24px;}
/* ============ Term cards ============ */
.term-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}
.term-card{
 background:var(--surface);
 border:1px solid var(--line);
 border-radius:var(--radius);
 padding:22px 20px;height:100%;
 box-shadow:var(--shadow-xs);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.term-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#cfe0f7;}
.term-card .ico{
 width:38px;height:38px;border-radius:10px;
 background:var(--brand-soft);color:var(--brand);
 display:flex;align-items:center;justify-content:center;
 font-size:18px;margin-bottom:14px;
}
.term-card h3{font-size:16px;color:#132a4d;margin:0 0 8px;}
.term-card p{font-size:14px;color:var(--muted);line-height:1.75;margin:0;}
/* ============ Steps ============ */
.step-list{display:grid;gap:14px;max-width:880px;}
.step-item{
 display:flex;gap:16px;align-items:flex-start;
 background:var(--surface);
 border:1px solid var(--line);
 border-radius:var(--radius);
 padding:20px 22px;
 box-shadow:var(--shadow-xs);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#cfe0f7;}
.step-num{
 flex:0 0 34px;width:34px;height:34px;border-radius:50%;
 background:linear-gradient(135deg,var(--brand),#3b86e0);
 color:#fff;font-size:14px;font-weight:700;
 display:flex;align-items:center;justify-content:center;
 box-shadow:0 6px 14px rgba(27,95,190,.24);
}
.step-item h3{font-size:16px;color:#132a4d;margin:2px 0 6px;}
.step-item p{font-size:14.5px;color:var(--muted);margin:0;line-height:1.75;}
/* ============ Post cards ============ */
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.post-card{
 display:flex;flex-direction:column;height:100%;
 background:var(--surface);
 border:1px solid var(--line);
 border-radius:var(--radius);
 overflow:hidden;
 box-shadow:var(--shadow-xs);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cfe0f7;color:inherit;}
.post-card figure{margin:0;aspect-ratio:16/10;overflow:hidden;background:#e6eefa;}
.post-card img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.post-card:hover img{transform:scale(1.05);}
.post-card-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1;}
.post-card-body h3{font-size:15.5px;line-height:1.55;color:#132a4d;margin:0;}
.post-card-body p{font-size:13.5px;color:var(--muted);margin:0;line-height:1.7;}
.post-card-body .more{margin-top:auto;font-size:13px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
.post-empty{
 background:var(--surface);border:1px dashed #c7dbf5;border-radius:var(--radius);
 padding:34px 24px;text-align:center;color:var(--muted);font-size:14.5px;
}
.post-empty .btn{margin-top:16px;}
/* ============ Channel cards ============ */
.channel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.channel-card{
 display:block;height:100%;
 background:var(--surface);
 border:1px solid var(--line);
 border-radius:var(--radius);
 padding:26px 24px;
 box-shadow:var(--shadow-xs);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cfe0f7;color:inherit;}
.channel-card .ico{
 width:44px;height:44px;border-radius:12px;
 background:var(--brand-soft);color:var(--brand);
 display:flex;align-items:center;justify-content:center;
 font-size:20px;margin-bottom:16px;
}
.channel-card h3{font-size:17px;color:#132a4d;margin:0 0 8px;}
.channel-card p{font-size:14px;color:var(--muted);margin:0 0 14px;line-height:1.75;}
.channel-card .go{font-size:13px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
/* ============ FAQ ============ */
.faq-list{max-width:880px;display:grid;gap:12px;}
.faq-item{
 background:var(--surface);
 border:1px solid var(--line);
 border-radius:var(--radius);
 box-shadow:var(--shadow-xs);
 overflow:hidden;
 transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:#cfe0f7;box-shadow:var(--shadow-sm);}
.faq-item summary{
 list-style:none;cursor:pointer;
 display:flex;align-items:center;justify-content:space-between;gap:16px;
 padding:16px 22px;font-size:15px;font-weight:600;color:#132a4d;
 min-height:40px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary i{color:var(--brand);font-size:14px;transition:transform .2s ease;flex-shrink:0;}
.faq-item[open] summary i{transform:rotate(45deg);}
.faq-body{padding:0 22px 18px;font-size:14.5px;color:var(--muted);line-height:1.85;}
.faq-body p{margin:0;}
/* ============ CTA band ============ */
.cta-band{
 background:linear-gradient(125deg,#12386f 0%,#1b5fbe 100%);
 border-radius:var(--radius-lg);
 padding:42px 44px;
 color:#fff;
 display:grid;grid-template-columns:1.6fr .9fr;gap:30px;align-items:center;
 box-shadow:var(--shadow-md);
 position:relative;overflow:hidden;
}
.cta-band::after{
 content:"";position:absolute;right:-90px;bottom:-120px;
 width:280px;height:280px;border-radius:50%;
 background:rgba(255,255,255,.09);
}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);color:#fff;margin:0 0 10px;line-height:1.5;position:relative;z-index:2;}
.cta-band p{font-size:14.5px;color:rgba(255,255,255,.82);margin:0;line-height:1.8;position:relative;z-index:2;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:2;justify-content:flex-end;}
/* ============ Footer ============ */
.site-footer{background:var(--brand-deep);color:#c3d2e6;padding:56px 0 0;margin-top:0;}
.footer-grid{
 display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:34px;
 padding-bottom:36px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{background:linear-gradient(135deg,#2f7ae0,#1b5fbe);box-shadow:0 6px 16px rgba(0,0,0,.25);}
.footer-brand .brand-text{color:#fff;font-size:17px;font-weight:700;letter-spacing:.5px;}
.footer-desc{font-size:14px;color:#93a8c4;line-height:1.8;margin:0;max-width:380px;}
.footer-col h4{font-size:15px;color:#fff;margin:0 0 14px;font-weight:600;}
.footer-links{display:grid;gap:9px;}
.footer-links a{font-size:14px;color:#9db2cd;transition:color .2s ease,padding-left .2s ease;}
.footer-links a:hover{color:#fff;padding-left:3px;}
.footer-bottom{
 border-top:1px solid rgba(255,255,255,.12);
 padding:18px 0;
 display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
 font-size:13px;color:#7e93af;
}
/* ============ Responsive ============ */
@media (max-width:1024px){
 .hero-grid{grid-template-columns:1fr;gap:26px;}
 .hero-figure{aspect-ratio:16/9;max-width:560px;}
 .term-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
 .post-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
 .channel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
 .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
 .cta-band{grid-template-columns:1fr;padding:34px 32px;}
 .cta-actions{justify-content:flex-start;}
 .article-wrap{padding:34px 30px;}
}
@media (max-width:768px){
 .section{padding:48px 0;}
 .page-hero{padding:30px 0 42px;}
 .page-hero .lead{font-size:15px;}
 .term-grid,
 .post-grid,
 .channel-grid{grid-template-columns:1fr;}
 .footer-grid{grid-template-columns:1fr;}
 .footer-bottom{flex-direction:column;gap:6px;}
 .article-wrap{padding:26px 20px;border-radius:var(--radius);}
 .article-content h1,
 .article-content h2{font-size:19px;}
 .article-content h3{font-size:17px;}
 .article-content table{font-size:13.5px;}
 .article-content th,
 .article-content td{padding:8px 10px;}
 .cta-band{padding:28px 22px;}
 .faq-item summary{padding:14px 16px;font-size:14.5px;}
 .faq-body{padding:0 16px 16px;}
 .step-item{padding:16px 16px;}
}
@media (max-width:520px){
 body{font-size:15px;}
 .container{padding:0 16px;}
 .brand-text{font-size:16px;}
 .page-hero h1{font-size:22px;line-height:1.45;}
 .header-actions .btn-sm{display:none;}
 .btn-lg{padding:12px 22px;font-size:15px;}
 .post-card-body{padding:16px;}
 .cta-actions .btn{width:100%;}
}

/* roulang page: category2 */
:root{
 --brand:#1b5fbe;
 --brand-dark:#12458f;
 --brand-deep:#0f1e36;
 --brand-soft:#eaf2fd;
 --accent:#12a594;
 --accent-soft:#e6f7f4;
 --ink:#16233a;
 --muted:#5b6b85;
 --bg:#f6f9fd;
 --surface:#ffffff;
 --line:#e3eaf4;
 --radius-lg:16px;
 --radius:12px;
 --radius-sm:10px;
 --shadow-xs:0 1px 2px rgba(20,45,85,.05);
 --shadow-sm:0 4px 14px rgba(20,45,85,.07);
 --shadow-md:0 14px 36px rgba(20,45,85,.12);
 --container:1160px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
 margin:0;
 font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
 font-size:15.5px;
 line-height:1.78;
 color:var(--ink);
 background:var(--bg);
 -webkit-font-smoothing:antialiased;
 overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;transition:color .2s ease;}
a:hover{color:var(--brand);}
p{orphans:2;widows:2;}
button{font-family:inherit;}
a:focus-visible,button:focus-visible,summary:focus-visible{
 outline:3px solid rgba(27,95,190,.35);
 outline-offset:2px;
 border-radius:8px;
}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
/* ============ Header ============ */
.site-header{
 position:sticky;top:0;z-index:1030;
 background:rgba(255,255,255,.94);
 backdrop-filter:blur(12px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-stuck{box-shadow:0 6px 20px rgba(20,45,85,.09);}
.header-bar{display:flex;align-items:center;gap:20px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
 width:36px;height:36px;border-radius:10px;
 display:flex;align-items:center;justify-content:center;
 background:linear-gradient(135deg,var(--brand),#3b86e0);
 color:#fff;font-size:18px;box-shadow:0 6px 16px rgba(27,95,190,.28);
}
.brand-text{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:.5px;}
.brand-text em{font-style:normal;color:var(--brand);}
.icon-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.icon-nav-item{
 display:flex;align-items:center;gap:7px;
 padding:8px 14px;border-radius:999px;
 font-size:14px;font-weight:500;color:var(--muted);
 transition:all .2s ease;
}
.icon-nav-item i{font-size:15px;}
.icon-nav-item:hover{color:var(--brand);background:var(--brand-soft);}
.icon-nav-item.active{color:var(--brand);background:var(--brand-soft);font-weight:600;}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.nav-toggle{
 width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
 background:#fff;color:var(--ink);font-size:19px;line-height:1;
 display:flex;align-items:center;justify-content:center;cursor:pointer;
 transition:all .2s ease;
}
.nav-toggle:hover{border-color:#c7dbf5;color:var(--brand);}
.mobile-nav{border-top:1px solid var(--line);background:#fff;box-shadow:var(--shadow-sm);}
.mobile-nav .container{padding:14px 20px 20px;display:grid;gap:6px;}
.mobile-link{
 display:flex;align-items:center;gap:10px;
 padding:12px 14px;border-radius:10px;font-size:15px;color:var(--muted);font-weight:500;
}
.mobile-link i{font-size:17px;}
.mobile-link.active,.mobile-link:hover{background:var(--brand-soft);color:var(--brand);}
/* ============ Buttons ============ */
.btn{
 border-radius:10px;font-weight:600;font-size:15px;
 padding:11px 22px;border:1px solid transparent;
 transition:all .2s ease;display:inline-flex;align-items:center;justify-content:center;gap:8px;
}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(27,95,190,.24);}
.btn-brand:hover,.btn-brand:focus{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(27,95,190,.3);}
.btn-brand:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--brand);border-color:#c7dbf5;}
.btn-ghost:hover,.btn-ghost:focus{background:var(--brand-soft);color:var(--brand-dark);border-color:#a9c9ef;transform:translateY(-2px);}
.btn-light-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.5);}
.btn-light-ghost:hover,.btn-light-ghost:focus{background:#fff;color:var(--brand-dark);border-color:#fff;}
.btn-sm{padding:8px 16px;font-size:13.5px;border-radius:9px;}
.btn-lg{padding:13px 30px;font-size:16px;border-radius:11px;}
/* ============ Category Hero ============ */
.cat-hero{position:relative;overflow:hidden;padding:60px 0 70px;background:#eef4fd;}
.hero-bg{
 position:absolute;inset:0;
 background-image:url('/assets/images/backpic/back-2.webp');
 background-size:cover;background-position:center;opacity:.45;
}
.hero-overlay{
 position:absolute;inset:0;
 background:linear-gradient(180deg,rgba(247,250,255,.9) 0%,rgba(247,250,255,.94) 60%,#f6f9fd 100%);
}
.cat-hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;}
.eyebrow{
 display:inline-flex;align-items:center;gap:8px;
 background:#fff;border:1px solid #d6e5f9;color:var(--brand);
 font-size:13px;font-weight:600;padding:7px 16px;border-radius:999px;
 box-shadow:var(--shadow-xs);margin-bottom:18px;
}
.cat-hero h1{
 font-size:clamp(27px,3.6vw,40px);
 line-height:1.3;letter-spacing:-.6px;margin:0 0 16px;color:#10203a;
}
.cat-hero h1 .hl{color:var(--brand);}
.cat-hero-lead{font-size:16px;color:#41536d;line-height:1.85;margin:0 0 24px;max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:20px;}
.pill-list{display:flex;flex-wrap:wrap;gap:10px;}
.pill{
 background:#fff;border:1px solid var(--line);color:#42566f;
 font-size:13px;font-weight:500;padding:6px 14px;border-radius:999px;
 box-shadow:var(--shadow-xs);
}
.pill i{color:var(--accent);margin-right:5px;}
/* 速查卡片墙 */
.tip-wall{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.tip-card{
 background:#fff;border:1px solid var(--line);border-radius:14px;
 padding:18px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
 display:flex;flex-direction:column;
}
.tip-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#bcd5f4;}
.tip-card .mini-tag{
 display:inline-flex;align-items:center;gap:6px;
 font-size:11.5px;font-weight:700;letter-spacing:1px;
 color:var(--accent);background:var(--accent-soft);
 padding:4px 10px;border-radius:999px;margin-bottom:10px;align-self:flex-start;
}
.tip-card h3{font-size:15.5px;margin:0 0 8px;line-height:1.5;}
.tip-card p{font-size:13.5px;color:var(--muted);line-height:1.7;margin:0;}
.tip-card--lead{
 grid-column:1 / -1;
 background:linear-gradient(135deg,#12386f 0%,#1b5fbe 100%);
 border:1px solid rgba(255,255,255,.18);
 color:#fff;padding:24px;box-shadow:0 18px 40px rgba(18,56,111,.28);
 position:relative;overflow:hidden;
}
.tip-card--lead::after{
 content:"";position:absolute;right:-40px;top:-40px;width:170px;height:170px;
 border-radius:50%;background:rgba(255,255,255,.08);
}
.tip-card--lead .mini-tag{background:rgba(255,255,255,.16);color:#d6ecff;}
.tip-card--lead h3{font-size:20px;margin:0 0 10px;color:#fff;}
.tip-card--lead p{color:rgba(255,255,255,.82);font-size:13.5px;max-width:330px;}
.tip-card--lead .btn{margin-top:16px;align-self:flex-start;position:relative;z-index:2;}
.tip-note{
 margin-top:12px;padding-top:12px;border-top:1px dashed rgba(255,255,255,.28);
 font-size:12.5px;color:rgba(255,255,255,.72);
 display:flex;justify-content:space-between;gap:10px;position:relative;z-index:2;
}
/* ============ Sections ============ */
.section{padding:72px 0;}
.section--alt{background:#eff4fb;}
.section--tint{background:var(--brand-soft);}
.section--deep{background:linear-gradient(125deg,#0f2d5c 0%,#1b5fbe 100%);color:#fff;}
.section-head{max-width:780px;margin-bottom:36px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.kicker{
 display:inline-flex;align-items:center;gap:8px;
 font-size:12.5px;font-weight:700;letter-spacing:1.6px;
 color:var(--brand);margin-bottom:10px;
}
.kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--accent);}
.section-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;letter-spacing:-.3px;margin:0 0 12px;}
.section-head p{margin:0;color:var(--muted);font-size:15px;line-height:1.8;}
.section--deep .kicker{color:#9fd0ff;}
.section--deep .kicker::before{background:#5fb8ff;}
.section--deep .section-head h2{color:#fff;}
.section--deep .section-head p{color:rgba(255,255,255,.78);}
/* ============ Grids & Cards ============ */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.card{
 background:#fff;border:1px solid var(--line);border-radius:14px;
 padding:22px;box-shadow:var(--shadow-sm);height:100%;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#bcd5f4;}
.card-icon{
 width:42px;height:42px;border-radius:11px;
 display:flex;align-items:center;justify-content:center;
 background:var(--brand-soft);color:var(--brand);font-size:20px;margin-bottom:14px;
}
.card-icon.accent{background:var(--accent-soft);color:var(--accent);}
.card h3{font-size:17px;margin:0 0 9px;line-height:1.5;}
.card p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.78;}
.card .tag-row{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px;}
.tag{
 font-size:12px;font-weight:600;color:var(--brand);
 background:var(--brand-soft);border-radius:999px;padding:4px 11px;
}
.tag.accent{color:var(--accent);background:var(--accent-soft);}
/* ============ Steps ============ */
.steps-split{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:start;}
.step-list{display:grid;gap:14px;}
.step-item{
 display:flex;gap:16px;background:#fff;border:1px solid var(--line);
 border-radius:12px;padding:18px 20px;box-shadow:var(--shadow-xs);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:#bcd5f4;}
.step-num{
 flex:0 0 38px;width:38px;height:38px;border-radius:11px;
 display:flex;align-items:center;justify-content:center;
 background:linear-gradient(135deg,var(--brand),#3b86e0);color:#fff;
 font-weight:700;font-size:15px;box-shadow:0 6px 14px rgba(27,95,190,.24);
}
.step-item h3{font-size:16px;margin:0 0 6px;}
.step-item p{margin:0;font-size:14px;color:var(--muted);line-height:1.76;}
.figure-card{
 border-radius:14px;overflow:hidden;border:1px solid var(--line);
 box-shadow:var(--shadow-md);background:#fff;
}
.figure-card img{width:100%;height:300px;object-fit:cover;}
.figure-card figcaption{
 padding:16px 20px;font-size:13.5px;color:var(--muted);line-height:1.7;
 border-top:1px solid var(--line);background:#fbfdff;
}
/* ============ Stats ============ */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.stat{
 padding:24px 20px;border-radius:14px;
 background:rgba(255,255,255,.09);
 border:1px solid rgba(255,255,255,.18);
 transition:background .2s ease,transform .2s ease;
}
.stat:hover{background:rgba(255,255,255,.16);transform:translateY(-3px);}
.stat b{display:block;font-size:30px;line-height:1.2;color:#fff;letter-spacing:-.5px;margin-bottom:6px;}
.stat span{display:block;font-size:13.5px;color:rgba(255,255,255,.76);line-height:1.6;}
/* ============ Quotes ============ */
.quote{
 background:#fff;border:1px solid var(--line);border-radius:14px;
 padding:24px;box-shadow:var(--shadow-sm);height:100%;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.quote:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#bcd5f4;}
.quote .mark{font-size:24px;color:var(--brand);line-height:1;margin-bottom:10px;display:block;}
.quote p{margin:0 0 16px;font-size:14.5px;color:#33465f;line-height:1.8;}
.quote .who{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);}
.quote .avatar{
 width:34px;height:34px;border-radius:50%;
 display:flex;align-items:center;justify-content:center;
 background:var(--brand-soft);color:var(--brand);font-weight:700;font-size:13px;
}
.quote .who b{display:block;font-size:13.5px;color:var(--ink);}
/* ============ Audience ============ */
.audience-item{
 display:flex;gap:14px;background:#fff;border:1px solid var(--line);
 border-radius:12px;padding:18px 20px;box-shadow:var(--shadow-xs);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.audience-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:#bcd5f4;}
.audience-item i{font-size:20px;color:var(--accent);line-height:1.5;}
.audience-item h3{font-size:15.5px;margin:0 0 5px;}
.audience-item p{margin:0;font-size:14px;color:var(--muted);line-height:1.75;}
/* ============ News list ============ */
.news-list{display:grid;gap:14px;}
.news-item{
 display:flex;gap:16px;align-items:flex-start;
 background:#fff;border:1px solid var(--line);border-radius:12px;
 padding:18px 20px;box-shadow:var(--shadow-xs);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:#bcd5f4;}
.news-item .num{
 flex:0 0 40px;width:40px;height:40px;border-radius:10px;
 display:flex;align-items:center;justify-content:center;
 background:var(--brand-soft);color:var(--brand);font-weight:700;font-size:14px;
}
.news-item h3{font-size:16.5px;margin:0 0 6px;line-height:1.5;}
.news-item h3 a:hover{color:var(--brand);}
.news-item p{margin:0 0 8px;font-size:14px;color:var(--muted);line-height:1.72;}
.news-item .meta{display:flex;flex-wrap:wrap;gap:14px;font-size:12.5px;color:#7d8da6;}
.news-item .meta i{margin-right:4px;}
.news-empty{
 background:#fff;border:1px dashed #c7dbf5;border-radius:12px;
 padding:28px;text-align:center;color:var(--muted);font-size:14.5px;
}
/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;max-width:900px;margin:0 auto;}
.faq-item{
 background:#fff;border:1px solid var(--line);border-radius:12px;
 padding:0 20px;box-shadow:var(--shadow-xs);transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:#bcd5f4;box-shadow:var(--shadow-sm);}
.faq-item[open]{border-color:#bcd5f4;box-shadow:var(--shadow-sm);}
.faq-item summary{
 cursor:pointer;list-style:none;padding:16px 0;
 font-size:15.5px;font-weight:600;color:var(--ink);
 display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
 content:"+";font-size:20px;font-weight:400;color:var(--brand);
 transition:transform .2s ease;line-height:1;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item .answer{padding:0 0 18px;font-size:14.5px;color:var(--muted);line-height:1.82;}
/* ============ CTA ============ */
.cta-band{
 position:relative;overflow:hidden;border-radius:var(--radius-lg);
 padding:44px 40px;color:#fff;
 background:linear-gradient(125deg,#0f2d5c 0%,#1b5fbe 70%,#2a7ad4 100%);
 box-shadow:0 20px 46px rgba(15,45,92,.28);
 display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band::after{
 content:"";position:absolute;right:-60px;bottom:-70px;width:240px;height:240px;
 border-radius:50%;background:rgba(255,255,255,.08);
}
.cta-band h2{font-size:clamp(21px,2.5vw,28px);margin:0 0 10px;color:#fff;position:relative;z-index:2;}
.cta-band p{margin:0;font-size:14.5px;color:rgba(255,255,255,.82);max-width:560px;line-height:1.8;position:relative;z-index:2;}
.cta-band .btn{position:relative;z-index:2;}
/* ============ Footer ============ */
.site-footer{background:#0f1e36;color:#c6d3e6;padding:54px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:36px;padding-bottom:34px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{width:34px;height:34px;font-size:16px;}
.footer-brand .brand-text{color:#fff;font-size:17px;}
.footer-desc{font-size:14px;color:#93a6c0;line-height:1.82;margin:0;max-width:340px;}
.footer-col h4{font-size:15px;color:#fff;margin:0 0 14px;letter-spacing:.5px;}
.footer-links{display:grid;gap:9px;}
.footer-links a{font-size:14px;color:#9db0c9;}
.footer-links a:hover{color:#fff;}
.footer-bottom{
 border-top:1px solid rgba(255,255,255,.12);
 padding:18px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
 font-size:13px;color:#8b9db6;
}
/* ============ Responsive ============ */
@media (max-width:1024px){
 .cat-hero-grid{grid-template-columns:1fr;gap:34px;}
 .cat-hero-lead{max-width:none;}
 .grid-4{grid-template-columns:repeat(2,1fr);}
 .grid-3{grid-template-columns:repeat(2,1fr);}
 .stat-grid{grid-template-columns:repeat(2,1fr);}
 .steps-split{grid-template-columns:1fr;gap:26px;}
 .figure-card img{height:260px;}
 .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
 .footer-desc{max-width:none;}
}
@media (max-width:768px){
 .section{padding:54px 0;}
 .cat-hero{padding:44px 0 54px;}
 .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
 .stat-grid{grid-template-columns:1fr 1fr;gap:12px;}
 .tip-wall{grid-template-columns:1fr;}
 .tip-card--lead{grid-column:auto;}
 .cta-band{padding:32px 24px;}
 .footer-grid{grid-template-columns:1fr;gap:24px;}
 .footer-bottom{flex-direction:column;gap:6px;}
 .section-head{margin-bottom:26px;}
}
@media (max-width:520px){
 .header-bar{height:60px;gap:12px;}
 .brand-text{font-size:16px;}
 .hero-actions .btn{width:100%;}
 .stat b{font-size:24px;}
 .news-item{flex-direction:column;gap:10px;}
 .news-item .num{width:34px;height:34px;font-size:13px;}
 .figure-card img{height:200px;}
 .tip-card--lead h3{font-size:18px;}
 .faq-item summary{font-size:14.5px;}
}

/* roulang page: category3 */
:root{
  --brand:#1b5fbe;
  --brand-dark:#12458f;
  --brand-deep:#0f1e36;
  --brand-soft:#eaf2fd;
  --accent:#12a594;
  --accent-soft:#e6f7f4;
  --ink:#16233a;
  --muted:#5b6b85;
  --bg:#f6f9fd;
  --surface:#ffffff;
  --line:#e3eaf4;
  --radius-lg:16px;
  --radius:12px;
  --radius-sm:10px;
  --shadow-xs:0 1px 2px rgba(20,45,85,.05);
  --shadow-sm:0 4px 14px rgba(20,45,85,.07);
  --shadow-md:0 14px 36px rgba(20,45,85,.12);
  --container:1160px;
}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:15.5px;
  line-height:1.78;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
*,*::before,*::after{box-sizing:border-box;}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;transition:color .2s ease;}
a:hover{color:var(--brand);}
h1,h2,h3,h4,h5{margin:0;color:#10203a;letter-spacing:-.2px;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-stuck{box-shadow:0 6px 20px rgba(20,45,85,.09);}
.header-bar{display:flex;align-items:center;gap:20px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand),#3b86e0);
  color:#fff;font-size:18px;box-shadow:0 6px 16px rgba(27,95,190,.28);
}
.brand-text{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:.5px;}
.brand-text em{font-style:normal;color:var(--brand);}
.icon-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.icon-nav-item{
  display:flex;align-items:center;gap:7px;
  padding:8px 14px;border-radius:999px;
  font-size:14px;font-weight:500;color:var(--muted);
  transition:all .2s ease;min-height:40px;
}
.icon-nav-item i{font-size:15px;}
.icon-nav-item:hover{color:var(--brand);background:var(--brand-soft);}
.icon-nav-item.active{color:var(--brand);background:var(--brand-soft);font-weight:600;}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.nav-toggle{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:#fff;color:var(--ink);font-size:19px;line-height:1;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  transition:all .2s ease;
}
.nav-toggle:hover{border-color:#c7dbf5;color:var(--brand);}
.nav-toggle:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.mobile-nav{border-top:1px solid var(--line);background:#fff;box-shadow:var(--shadow-sm);}
.mobile-nav .container{padding:14px 20px 20px;display:grid;gap:6px;}
.mobile-link{
  display:flex;align-items:center;gap:10px;
  padding:12px 14px;border-radius:10px;font-size:15px;color:var(--muted);font-weight:500;
  min-height:44px;
}
.mobile-link i{font-size:17px;}
.mobile-link.active,.mobile-link:hover{background:var(--brand-soft);color:var(--brand);}

/* ============ Buttons ============ */
.btn{
  border-radius:10px;font-weight:600;font-size:15px;
  padding:11px 22px;border:1px solid transparent;
  transition:all .2s ease;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;
}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(27,95,190,.24);}
.btn-brand:hover,.btn-brand:focus{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(27,95,190,.3);}
.btn-brand:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--brand);border-color:#c7dbf5;}
.btn-ghost:hover,.btn-ghost:focus{background:var(--brand-soft);color:var(--brand-dark);border-color:#a9c9ef;transform:translateY(-2px);}
.btn-light-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.5);}
.btn-light-ghost:hover{background:#fff;color:var(--brand-dark);}
.btn-sm{padding:8px 16px;font-size:13.5px;border-radius:9px;min-height:40px;}
.btn-lg{padding:13px 30px;font-size:16px;border-radius:11px;min-height:50px;}

/* ============ Page Hero ============ */
.page-hero{position:relative;overflow:hidden;padding:58px 0 66px;background:#eef4fd;}
.page-hero .hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-4.webp');
  background-size:cover;background-position:center;opacity:.34;
}
.page-hero .hero-overlay{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(247,250,255,.9) 0%,rgba(247,250,255,.94) 58%,#f6f9fd 100%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.12fr .88fr;gap:44px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid #d6e5f9;color:var(--brand);
  font-size:13px;font-weight:600;padding:7px 16px;border-radius:999px;
  box-shadow:var(--shadow-xs);margin-bottom:18px;
}
.eyebrow i{font-size:14px;}
.page-hero h1{
  font-size:clamp(27px,3.6vw,40px);
  line-height:1.34;letter-spacing:-.6px;margin-bottom:16px;color:#10203a;
}
.page-hero h1 .hl{color:var(--brand);}
.hero-lead{font-size:15.5px;color:#41536d;line-height:1.88;margin-bottom:24px;max-width:620px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}
.pill-list{display:flex;flex-wrap:wrap;gap:10px;}
.pill{
  background:#fff;border:1px solid var(--line);color:#42566f;
  font-size:13px;font-weight:500;padding:6px 14px;border-radius:999px;
  box-shadow:var(--shadow-xs);display:inline-flex;align-items:center;
}
.pill i{color:var(--accent);margin-right:6px;font-size:13px;}

/* Support panel */
.side-panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-md);padding:24px;
}
.side-panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.side-title{font-size:14px;font-weight:600;color:var(--muted);}
.version-tag{
  font-size:13px;font-weight:700;color:var(--brand-dark);
  background:var(--brand-soft);border-radius:999px;padding:4px 12px;
}
.ring-wrap{display:flex;align-items:center;gap:18px;margin-bottom:20px;}
.ring{
  position:relative;width:118px;height:118px;border-radius:50%;flex-shrink:0;
  background:conic-gradient(var(--brand) calc(var(--p) * 1%), #e2ecf9 0);
  display:grid;place-items:center;
}
.ring::before{content:"";position:absolute;inset:11px;border-radius:50%;background:#fff;}
.ring-text{position:relative;font-size:25px;font-weight:700;color:var(--brand);line-height:1;}
.ring-text span{font-size:13px;font-weight:600;}
.ring-info strong{display:block;font-size:14.5px;color:var(--ink);margin-bottom:6px;}
.ring-info p{font-size:13px;color:var(--muted);line-height:1.7;}
.tier-preview{display:grid;gap:12px;margin-bottom:20px;}
.tier-row{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13.5px;color:#3b4d67;font-weight:500;}
.tier-row i{color:var(--brand);margin-right:6px;}
.tier-meta{font-size:12.5px;color:var(--muted);font-weight:600;}
.tier-bar{height:6px;border-radius:999px;background:#eef3fa;overflow:hidden;margin-top:6px;}
.tier-bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),#5d9ae8);}
.tier-bar.is-accent span{background:linear-gradient(90deg,var(--accent),#4ecdc0);}

/* ============ Sections ============ */
.section{padding:74px 0;}
.section--alt{background:#eff4fb;}
.section--tint{background:var(--brand-soft);}
.section-head{max-width:760px;margin-bottom:34px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;font-weight:700;color:var(--brand);letter-spacing:.6px;margin-bottom:10px;
}
.kicker::before{content:"";width:22px;height:3px;border-radius:2px;background:var(--brand);display:inline-block;}
.section-head.center .kicker::after{content:"";width:22px;height:3px;border-radius:2px;background:var(--brand);display:inline-block;}
.section-head .kicker::before{display:inline-block;}
.section-head h2{font-size:clamp(21px,2.5vw,29px);font-weight:700;line-height:1.4;margin-bottom:10px;}
.section-head p{color:var(--muted);font-size:15px;line-height:1.85;}

/* Tier cards */
.tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.tier-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px 24px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  display:flex;flex-direction:column;height:100%;
}
.tier-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c7dbf5;}
.tier-card .tier-icon{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-size:20px;margin-bottom:14px;
}
.tier-card:hover .tier-icon{background:var(--brand);color:#fff;}
.tier-name{font-size:17px;font-weight:700;margin-bottom:6px;}
.tier-size{font-size:26px;font-weight:700;color:var(--brand);line-height:1.2;margin-bottom:12px;}
.tier-size small{font-size:13px;color:var(--muted);font-weight:500;margin-left:4px;}
.tier-desc{font-size:14.2px;color:var(--muted);line-height:1.8;margin-bottom:16px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;}
.tag{
  font-size:12.5px;font-weight:600;color:var(--brand-dark);
  background:var(--brand-soft);border-radius:999px;padding:4px 12px;
}
.tag.is-accent{color:#0c7a6e;background:var(--accent-soft);}

/* Spec strip */
.spec-strip{
  margin-top:26px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:22px 24px;box-shadow:var(--shadow-xs);
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;
}
.spec-item{display:flex;gap:12px;align-items:flex-start;}
.spec-item i{font-size:18px;color:var(--accent);margin-top:3px;}
.spec-item strong{display:block;font-size:14px;color:var(--ink);margin-bottom:2px;}
.spec-item span{font-size:13px;color:var(--muted);line-height:1.7;}

/* Platform */
.plat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.plat-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;box-shadow:var(--shadow-sm);display:flex;gap:16px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.plat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#c7dbf5;}
.plat-icon{
  width:46px;height:46px;border-radius:12px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-size:21px;
  transition:all .2s ease;
}
.plat-card:hover .plat-icon{background:var(--brand);color:#fff;}
.plat-card h3{font-size:16px;font-weight:700;margin-bottom:6px;}
.plat-card p{font-size:14px;color:var(--muted);line-height:1.8;}
.plat-card .meta-line{font-size:12.5px;color:#7b8aa3;margin-top:10px;display:flex;flex-wrap:wrap;gap:12px;}
.plat-card .meta-line i{margin-right:4px;color:var(--accent);}

/* Checklist */
.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.check-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;display:flex;gap:14px;box-shadow:var(--shadow-xs);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.check-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:#c7dbf5;}
.check-num{
  width:30px;height:30px;border-radius:9px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:700;
}
.check-item strong{display:block;font-size:14.5px;color:var(--ink);margin-bottom:4px;}
.check-item p{font-size:13.6px;color:var(--muted);line-height:1.78;}

/* Steps */
.step-list{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.step-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px 22px 24px;box-shadow:var(--shadow-sm);height:100%;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c7dbf5;}
.step-no{
  font-size:13px;font-weight:700;color:var(--brand);
  background:var(--brand-soft);border-radius:999px;padding:4px 12px;display:inline-block;margin-bottom:14px;
}
.step-card h3{font-size:16px;font-weight:700;margin-bottom:8px;}
.step-card p{font-size:13.8px;color:var(--muted);line-height:1.8;}

/* Timeline */
.timeline{position:relative;padding-left:26px;}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--brand),#cfe1f7);border-radius:2px;}
.tl-item{position:relative;padding:0 0 26px 0;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-25px;top:7px;width:12px;height:12px;border-radius:50%;
  background:#fff;border:3px solid var(--brand);box-shadow:0 0 0 4px rgba(27,95,190,.09);
}
.tl-ver{font-size:13px;font-weight:700;color:var(--brand);letter-spacing:.4px;margin-bottom:4px;}
.tl-item h3{font-size:15.5px;font-weight:700;margin-bottom:6px;}
.tl-item p{font-size:14px;color:var(--muted);line-height:1.8;}

/* Scenes */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.scene-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;height:100%;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c7dbf5;}
.scene-thumb{aspect-ratio:16/10;overflow:hidden;background:#dce8f8;}
.scene-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.scene-card:hover .scene-thumb img{transform:scale(1.04);}
.scene-body{padding:20px 22px 22px;}
.scene-body h3{font-size:16px;font-weight:700;margin-bottom:8px;}
.scene-body p{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:14px;}

/* FAQ */
.faq-accordion .accordion-item{
  border:1px solid var(--line);border-radius:var(--radius);
  margin-bottom:12px;overflow:hidden;background:#fff;box-shadow:var(--shadow-xs);
}
.faq-accordion .accordion-button{
  font-weight:600;color:var(--ink);font-size:15.2px;
  padding:17px 20px;background:#fff;box-shadow:none;border-radius:var(--radius);
}
.faq-accordion .accordion-button:not(.collapsed){background:var(--brand-soft);color:var(--brand-dark);}
.faq-accordion .accordion-button:focus{box-shadow:none;outline:2px solid rgba(27,95,190,.4);outline-offset:-2px;}
.faq-accordion .accordion-button::after{width:15px;height:15px;background-size:15px;}
.faq-accordion .accordion-body{padding:2px 20px 20px;color:var(--muted);font-size:14.3px;line-height:1.85;}

/* News list */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.post-card{
  display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:22px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c7dbf5;color:inherit;}
.post-cat{
  display:inline-block;font-size:12.5px;font-weight:600;color:var(--brand-dark);
  background:var(--brand-soft);border-radius:999px;padding:3px 11px;margin-bottom:12px;align-self:flex-start;
}
.post-card h3{font-size:15.6px;font-weight:700;line-height:1.6;margin-bottom:8px;}
.post-card p{font-size:13.7px;color:var(--muted);line-height:1.8;margin-bottom:14px;}
.post-time{font-size:12.5px;color:#7b8aa3;margin-top:auto;}
.empty-note{
  grid-column:1/-1;text-align:center;color:var(--muted);font-size:14.5px;
  background:#fff;border:1px dashed #cfdcee;border-radius:var(--radius);padding:32px 20px;
}

/* CTA band */
.cta-band{
  position:relative;overflow:hidden;
  background:linear-gradient(125deg,#12386f 0%,#1b5fbe 100%);
  border-radius:var(--radius-lg);padding:44px 42px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;
  box-shadow:0 20px 44px rgba(18,56,111,.24);
}
.cta-band h2{color:#fff;font-size:clamp(20px,2.4vw,27px);margin-bottom:10px;letter-spacing:-.3px;}
.cta-band p{color:rgba(255,255,255,.82);font-size:14.6px;line-height:1.85;max-width:640px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ Footer ============ */
.site-footer{background:#0f1e36;color:#c3d0e2;padding:56px 0 26px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;padding-bottom:34px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{background:linear-gradient(135deg,#2d6fd0,#4a8fe6);box-shadow:none;}
.footer-brand .brand-text{color:#fff;}
.footer-brand .brand-text em{color:#7fb2f0;}
.footer-desc{font-size:13.8px;line-height:1.85;color:#93a5bd;max-width:360px;}
.footer-col h4{font-size:14.5px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.4px;}
.footer-links{display:grid;gap:10px;}
.footer-links a{font-size:13.8px;color:#93a5bd;transition:color .2s ease;}
.footer-links a:hover{color:#7fb2f0;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding-top:20px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#7d8da5;
}

/* ============ Responsive ============ */
@media (max-width:991.98px){
  .hero-grid{grid-template-columns:1fr;gap:30px;}
  .tier-grid{grid-template-columns:1fr;gap:16px;}
  .spec-strip{grid-template-columns:repeat(2,1fr);}
  .step-list{grid-template-columns:repeat(2,1fr);}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .post-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .footer-grid > div:first-child{grid-column:1/-1;}
}
@media (max-width:767.98px){
  .section{padding:52px 0;}
  .page-hero{padding:40px 0 48px;}
  .plat-grid{grid-template-columns:1fr;}
  .check-grid{grid-template-columns:1fr;}
  .scene-grid{grid-template-columns:1fr;}
  .post-grid{grid-template-columns:1fr;}
  .cta-band{padding:32px 24px;}
  .hero-actions{width:100%;}
  .side-panel{padding:20px;}
  .ring{width:104px;height:104px;}
  .ring-text{font-size:22px;}
}
@media (max-width:519.98px){
  .spec-strip{grid-template-columns:1fr;}
  .step-list{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .ring-wrap{flex-direction:column;align-items:flex-start;gap:14px;}
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}