/* roulang page: index */
:root{
  --orange:#FF6A1A;
  --orange-dark:#D8520A;
  --orange-light:#FFF3EA;
  --cyan:#17C3B2;
  --cyan-light:#E6F8F6;
  --purple:#6C4CF1;
  --purple-light:#EFEBFF;
  --dark:#0E1015;
  --dark-2:#171A22;
  --dark-line:#262A35;
  --bg:#F5F6F8;
  --card:#FFFFFF;
  --block:#F0F2F5;
  --text:#14161B;
  --text-2:#5A6172;
  --text-3:#8C93A3;
  --dark-text:#C9CEDA;
  --border:#E6E9EF;
  --warn:#FFB020;
  --err:#F04438;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh:0 1px 2px rgba(20,22,27,.05),0 6px 18px rgba(20,22,27,.06);
  --sh-h:0 10px 28px rgba(20,22,27,.12);
  --t:.22s ease;
  --focus:0 0 0 3px rgba(255,106,26,.22);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;line-height:1.85;color:var(--text);background:var(--bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border:0}
a{color:var(--orange);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--orange-dark)}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font:inherit}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.mono{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--dark);color:var(--dark-text);font-size:13px;height:36px;display:flex;align-items:center}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px}
.tb-left{display:flex;align-items:center;gap:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tb-domain{color:#fff;font-weight:600}
.tb-div{color:var(--dark-line)}
.tb-right{display:flex;align-items:center;gap:20px;white-space:nowrap}
.tb-right a{color:var(--dark-text);text-decoration:none;transition:color var(--t)}
.tb-right a:hover{color:var(--orange)}

/* ---------- 主导航 ---------- */
.navbar{background:#fff;border-bottom:1px solid var(--border);height:68px;position:sticky;top:0;z-index:80;transition:box-shadow var(--t)}
.navbar.scrolled{box-shadow:0 6px 18px rgba(20,22,27,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);flex-shrink:0}
.logo:hover{color:var(--text)}
.logo-mark{width:26px;height:26px;background:var(--dark);clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,0 100%);display:flex;align-items:center;justify-content:center}
.logo-mark i{display:block;width:9px;height:9px;background:var(--orange);clip-path:polygon(0 0,100% 0,100% 100%,0 100%)}
.logo-text{font-size:18px;font-weight:800;letter-spacing:-.2px}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{position:relative;display:flex;align-items:center;height:68px;font-size:15px;font-weight:500;color:var(--text-2);text-decoration:none;transition:color var(--t)}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--orange);transform:scaleX(0);transform-origin:left;transition:transform var(--t)}
.nav-links a:hover{color:var(--orange)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--orange);font-weight:600}
.nav-cta{display:flex;align-items:center;gap:12px}
.burger{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);align-items:center;justify-content:center;flex-direction:column;gap:4px}
.burger span{display:block;width:17px;height:2px;background:var(--text);border-radius:2px;transition:transform var(--t),opacity var(--t)}
.burger:hover{border-color:var(--orange)}
.drawer-mask{position:fixed;inset:0;background:rgba(14,16,21,.5);opacity:0;pointer-events:none;transition:opacity var(--t);z-index:90}
.drawer-mask.show{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;bottom:0;width:82%;max-width:360px;background:#fff;z-index:100;transform:translateX(102%);transition:transform .28s ease;display:flex;flex-direction:column}
.drawer.open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}
.drawer-close{width:36px;height:36px;border-radius:8px;border:1px solid var(--border);font-size:16px;color:var(--text-2);display:flex;align-items:center;justify-content:center}
.drawer-nav{padding:8px 0;flex:1;overflow-y:auto}
.drawer-nav a{display:flex;align-items:center;height:52px;padding:0 20px;font-size:15px;color:var(--text);text-decoration:none;border-bottom:1px solid var(--border)}
.drawer-nav a.active{color:var(--orange);font-weight:600;background:var(--orange-light)}
.drawer-foot{padding:16px 20px;border-top:1px solid var(--border)}
.drawer-foot .btn{width:100%;justify-content:center}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;font-size:15px;font-weight:600;border-radius:var(--r-btn);text-decoration:none;transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),clip-path var(--t);clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%)}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-dark);color:#fff;clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,0 100%)}
.btn-ghost{background:transparent;color:var(--orange);box-shadow:inset 0 0 0 1.5px var(--orange)}
.btn-ghost:hover{background:var(--orange-light);color:var(--orange-dark);box-shadow:inset 0 0 0 1.5px var(--orange-dark)}
.btn-dark-ghost{background:transparent;color:#fff;box-shadow:inset 0 0 0 1.5px rgba(255,255,255,.3)}
.btn-dark-ghost:hover{background:rgba(255,255,255,.08);color:#fff}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--orange);text-decoration:none}
.link-arrow i{font-style:normal;transition:transform var(--t)}
.link-arrow:hover i{transform:translateX(3px)}

/* ---------- 徽章 ---------- */
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;font-size:12px;line-height:1;border-radius:6px;background:var(--cyan-light);color:#0E8C81;font-weight:600}
.badge-purple{background:var(--purple-light);color:#4B31C4}
.badge-orange{background:var(--orange-light);color:var(--orange-dark)}
.badge-pill{border-radius:999px}
.badge-soft{background:var(--block);color:var(--text-2);font-weight:500}

/* ---------- 板块与标题 ---------- */
.sec{padding:88px 0}
.sec-alt{background:#fff}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.sec-title{display:flex;align-items:center;gap:12px}
.sec-title::before{content:"";display:block;width:4px;height:26px;background:var(--orange);border-radius:2px}
.sec-title h2{font-size:32px;font-weight:700;line-height:1.3;letter-spacing:-.2px}
.sec-sub{margin-top:10px;font-size:15px;color:var(--text-3);line-height:1.6}
.sec-body{max-width:780px}
.sec-body p{font-size:16px;color:var(--text-2);margin-bottom:1.1em}

/* ---------- Hero ---------- */
.hero{background:var(--dark);color:#fff;position:relative;overflow:hidden;padding-top:56px}
.hero::before{
  content:"";position:absolute;inset:0;opacity:.055;pointer-events:none;
  background-image:
    linear-gradient(60deg,transparent 47%,#fff 47%,#fff 53%,transparent 53%),
    linear-gradient(-60deg,transparent 47%,#fff 47%,#fff 53%,transparent 53%);
  background-size:52px 90px;
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;padding-bottom:56px;min-height:520px}
.hero h1{font-size:44px;font-weight:800;line-height:1.18;letter-spacing:-.4px;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--orange)}
.hero-sub{font-size:18px;color:var(--dark-text);line-height:1.7;max-width:520px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px}
.hero-stats{display:flex;align-items:stretch;gap:0;border-top:1px solid var(--dark-line);padding-top:24px;max-width:560px}
.hstat{flex:1;padding-right:20px;margin-right:20px;border-right:1px solid var(--dark-line)}
.hstat:last-child{border-right:0;margin-right:0;padding-right:0}
.hstat b{display:block;font-size:32px;font-weight:800;color:var(--orange);line-height:1.2}
.hstat .hstat-c{color:var(--cyan)}
.hstat span{font-size:13px;color:var(--text-3)}
.hero-media{position:relative}
.hero-media-frame{position:relative;border:1px solid var(--dark-line);clip-path:polygon(0 20px,20px 0,100% 0,100% 100%,0 100%);overflow:hidden;border-radius:2px}
.hero-media-frame img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-media-frame::after{content:"";position:absolute;inset:0;background:rgba(14,16,21,.2)}
.hero-media-tag{position:absolute;left:18px;bottom:18px;z-index:3;background:rgba(14,16,21,.78);border:1px solid var(--dark-line);border-radius:6px;padding:8px 12px;font-size:13px;color:var(--dark-text)}
.hero-strip{position:relative;z-index:2;background:var(--dark-2);border-top:1px solid var(--dark-line)}
.hero-strip ul{display:grid;grid-template-columns:repeat(3,1fr)}
.hero-strip li{display:flex;align-items:center;gap:12px;padding:18px 24px;border-right:1px solid var(--dark-line);font-size:14px;color:var(--dark-text)}
.hero-strip li:last-child{border-right:0}
.hero-strip .hs-ic{width:26px;height:26px;flex:0 0 26px;background:var(--orange-light);color:var(--orange);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;clip-path:polygon(0 0,calc(100% - 7px) 0,100% 7px,100% 100%,0 100%)}

/* ---------- 功能分组 ---------- */
.feature-list{display:flex;flex-direction:column;gap:48px}
.feature-row{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.feature-row.rev{grid-template-columns:5fr 7fr}
.feature-row.rev .fr-text{order:2}
.feature-row.rev .fr-media{order:1}
.fr-num{font-size:14px;font-weight:800;color:var(--orange);letter-spacing:2px;margin-bottom:14px}
.fr-text h3{font-size:21px;font-weight:600;line-height:1.4;margin-bottom:12px}
.fr-text p{font-size:16px;color:var(--text-2);margin-bottom:1.1em}
.fr-points{display:flex;flex-direction:column;gap:10px;margin-top:18px}
.fr-points li{display:flex;gap:10px;font-size:15px;color:var(--text-2);line-height:1.7}
.fr-points li::before{content:"";flex:0 0 8px;width:8px;height:8px;margin-top:9px;background:var(--cyan);border-radius:2px}
.fr-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);border:1px solid var(--border)}
.fr-media figcaption{font-size:13px;color:var(--text-3);margin-top:10px;text-align:center}

/* ---------- 场景切换 ---------- */
.tab-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:32px}
.tab{height:40px;padding:0 18px;border-radius:999px;border:1px solid var(--border);background:#fff;font-size:14px;font-weight:500;color:var(--text-2);transition:all var(--t);white-space:nowrap}
.tab:hover{border-color:var(--orange);color:var(--orange)}
.tab.active{background:var(--orange);border-color:var(--orange);color:#fff;font-weight:600}
.scene-panel{display:none}
.scene-panel.active{display:grid;grid-template-columns:6fr 6fr;gap:40px;align-items:center}
.scene-panel img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);border:1px solid var(--border)}
.scene-text h3{font-size:21px;font-weight:600;margin-bottom:14px}
.scene-text p{font-size:16px;color:var(--text-2);margin-bottom:1.1em}
.scene-list{display:flex;flex-direction:column;gap:12px;margin-top:20px}
.scene-list li{display:flex;gap:12px;font-size:15px;color:var(--text-2);padding:12px 14px;background:#fff;border:1px solid var(--border);border-radius:10px}
.scene-list li b{color:var(--cyan);font-weight:800;flex:0 0 auto}

/* ---------- 案例 ---------- */
.case-grid{display:grid;grid-template-columns:6fr 6fr;gap:24px}
.case-main{grid-row:span 2;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--sh);overflow:hidden;transition:transform var(--t),box-shadow var(--t)}
.case-main:hover,.case-small:hover{transform:translateY(-3px);box-shadow:var(--sh-h)}
.case-main img{width:100%;aspect-ratio:16/10;object-fit:cover}
.case-main-body{padding:24px}
.case-main-body h3{font-size:21px;font-weight:600;margin:14px 0 10px}
.case-main-body p{font-size:15px;color:var(--text-2)}
.case-metrics{display:flex;gap:0;margin-top:20px;border-top:1px solid var(--border);padding-top:18px}
.case-metrics div{flex:1;padding-right:18px;margin-right:18px;border-right:1px solid var(--border)}
.case-metrics div:last-child{border-right:0;margin-right:0;padding-right:0}
.case-metrics b{display:block;font-size:26px;font-weight:800;color:var(--orange);line-height:1.2}
.case-metrics span{font-size:13px;color:var(--text-3)}
.case-small{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--sh);padding:24px;transition:transform var(--t),box-shadow var(--t)}
.case-small h3{font-size:18px;font-weight:600;margin-bottom:8px}
.case-small p{font-size:15px;color:var(--text-2)}
.case-small .case-metrics{margin-top:16px;padding-top:14px}
.case-small .case-metrics b{font-size:22px}
.case-more{margin-top:28px}

/* ---------- 价格 ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.price-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:28px 24px;box-shadow:var(--sh);display:flex;flex-direction:column;transition:transform var(--t),box-shadow var(--t);position:relative}
.price-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h)}
.price-card.featured{border:1.5px solid var(--orange);box-shadow:var(--sh-h)}
.price-card.featured::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--orange);border-radius:14px 14px 0 0}
.price-tag{position:absolute;top:-1px;right:20px;background:var(--orange);color:#fff;font-size:12px;font-weight:600;padding:4px 12px;border-radius:0 0 6px 6px}
.price-name{font-size:18px;font-weight:700;margin-bottom:6px}
.price-desc{font-size:13px;color:var(--text-3);margin-bottom:18px;min-height:40px}
.price-amount{display:flex;align-items:baseline;gap:6px;padding-bottom:20px;border-bottom:1px solid var(--border);margin-bottom:20px}
.price-amount b{font-size:34px;font-weight:800;color:var(--text);line-height:1.1}
.price-amount small{font-size:13px;color:var(--text-3)}
.price-list{display:flex;flex-direction:column;gap:12px;flex:1;margin-bottom:24px}
.price-list li{display:flex;gap:10px;font-size:15px;color:var(--text-2)}
.price-list li::before{content:"✓";color:var(--cyan);font-weight:800;flex:0 0 auto}
.price-note{margin-top:24px;font-size:13px;color:var(--text-3)}

/* ---------- CMS 列表 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh);display:flex;flex-direction:column;transition:transform var(--t),box-shadow var(--t)}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h)}
.post-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.post-body{padding:20px;display:flex;flex-direction:column;flex:1}
.post-body h3{font-size:18px;font-weight:600;line-height:1.5;margin:12px 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-body h3 a{color:var(--text);text-decoration:none}
.post-body h3 a:hover{color:var(--orange)}
.post-body p{font-size:14px;color:var(--text-2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:16px}
.post-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid var(--border);font-size:13px;color:var(--text-3)}
.empty-state{grid-column:1/-1;text-align:center;padding:56px 24px;background:#fff;border:1px dashed var(--border);border-radius:var(--r-card)}
.empty-state .es-ic{width:52px;height:52px;margin:0 auto 16px;border-radius:50%;border:2px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--text-3);font-size:20px}
.empty-state p{font-size:16px;color:var(--text-2);margin-bottom:6px}
.empty-state span{font-size:13px;color:var(--text-3)}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;align-items:start}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:12px;transition:background var(--t),border-color var(--t)}
.faq-item[open]{background:#FFF7F1;border-color:#FFD9C2;position:relative}
.faq-item[open]::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--orange);border-radius:12px 0 0 12px}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 20px;font-size:16px;font-weight:600;color:var(--text);display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary i{font-style:normal;color:var(--orange);font-weight:700;transition:transform var(--t);flex:0 0 auto}
.faq-item[open] summary i{transform:rotate(180deg)}
.faq-body{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--text-2)}

/* ---------- CTA ---------- */
.cta-band{background:var(--dark);color:#fff;position:relative;overflow:hidden}
.cta-band .container{display:flex;align-items:center;justify-content:space-between;gap:32px;padding-top:56px;padding-bottom:56px;flex-wrap:wrap}
.cta-band h2{font-size:32px;font-weight:700;line-height:1.3;margin-bottom:10px}
.cta-band p{font-size:15px;color:var(--dark-text)}

/* ---------- 页脚 ---------- */
.footer{background:var(--dark);color:var(--dark-text);padding-top:64px}
.footer .f-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:48px}
.f-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.f-brand .logo-mark{background:#fff}
.f-brand b{color:#fff;font-size:18px;font-weight:800}
.f-col p{font-size:14px;line-height:1.8;color:var(--dark-text);max-width:300px}
.f-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.f-col ul{display:flex;flex-direction:column;gap:10px}
.f-col ul a{font-size:14px;color:var(--dark-text);text-decoration:none;transition:color var(--t)}
.f-col ul a:hover{color:var(--orange)}
.f-legal{border-top:1px solid var(--dark-line);padding:20px 0;font-size:13px;color:var(--text-3);display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.f-legal a{color:var(--text-3);text-decoration:none}
.f-legal a:hover{color:var(--orange)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:100%}
  .sec{padding:72px 0}
  .hero h1{font-size:38px}
}
@media (max-width:1023px){
  .nav-links{gap:18px}
  .nav-links a{font-size:14px}
  .hero-inner{grid-template-columns:1fr;gap:36px;min-height:auto;padding-top:16px}
  .hero-media{order:2}
  .hero-stats{max-width:100%}
  .feature-row,.feature-row.rev{grid-template-columns:1fr;gap:28px}
  .feature-row.rev .fr-text{order:1}
  .feature-row.rev .fr-media{order:2}
  .scene-panel.active{grid-template-columns:1fr;gap:28px}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:1fr;gap:20px}
  .case-grid{grid-template-columns:1fr}
  .case-main{grid-row:auto}
  .sec-title h2{font-size:26px}
}
@media (max-width:767px){
  body{font-size:15px}
  .container{padding:0 18px}
  .topbar{height:32px}
  .topbar .tb-hide{display:none}
  .nav-links,.nav-cta{display:none}
  .burger{display:flex}
  .sec{padding:48px 0}
  .sec-head{margin-bottom:28px}
  .sec-title h2{font-size:24px}
  .hero{padding-top:36px}
  .hero h1{font-size:30px}
  .hero-sub{font-size:16px}
  .hero-actions .btn{width:100%}
  .hero-stats{display:grid;grid-template-columns:1fr;gap:0;border-top:1px solid var(--dark-line)}
  .hstat{border-right:0;border-bottom:1px solid var(--dark-line);padding:14px 0;margin:0}
  .hstat:last-child{border-bottom:0}
  .hero-strip ul{grid-template-columns:1fr}
  .hero-strip li{border-right:0;border-bottom:1px solid var(--dark-line);padding:14px 18px}
  .hero-strip li:last-child{border-bottom:0}
  .hero::before{opacity:0}
  .feature-list{gap:36px}
  .fr-text h3{font-size:18px}
  .tab-row{flex-wrap:nowrap;overflow-x:auto;padding-bottom:6px;-webkit-overflow-scrolling:touch}
  .tab-row::-webkit-scrollbar{display:none}
  .post-grid{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr}
  .qa-item summary{padding:16px}
  .cta-band .container{padding-top:44px;padding-bottom:44px}
  .cta-band h2{font-size:24px}
  .cta-band .btn{width:100%}
  .footer .f-top{grid-template-columns:1fr;gap:0;padding-bottom:24px}
  .f-col{border-bottom:1px solid var(--dark-line)}
  .f-col h4{margin:0;padding:16px 0;display:flex;justify-content:space-between;align-items:center;cursor:pointer}
  .f-col h4::after{content:"+";color:var(--text-3);font-weight:400}
  .f-col.open h4::after{content:"–"}
  .f-col ul,.f-col p{display:none;padding-bottom:16px}
  .f-col.open ul,.f-col.open p{display:flex}
  .f-col.open p{display:block}
  .f-legal{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:479px){
  .hero h1{font-size:28px;line-height:1.22}
  .sec-title h2{font-size:22px}
  .hstat b{font-size:26px}
  .case-metrics b{font-size:22px}
  .price-amount b{font-size:28px}
  .tb-left .tb-tip{display:none}
}

/* roulang page: article */
:root{
  --brand:#FF6A1A;
  --brand-dark:#D8520A;
  --brand-soft:#FFF3EA;
  --cyan:#17C3B2;
  --cyan-soft:#E6F8F6;
  --purple:#6C4CF1;
  --purple-soft:#EFEBFF;
  --ink:#0E1015;
  --ink-2:#171A22;
  --ink-line:#262A35;
  --bg:#F5F6F8;
  --card:#FFFFFF;
  --soft:#F0F2F5;
  --t1:#14161B;
  --t2:#5A6172;
  --t3:#8C93A3;
  --td:#C9CEDA;
  --line:#E6E9EF;
  --ok:#17C3B2;
  --warn:#FFB020;
  --err:#F04438;
  --info:#6C4CF1;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-badge:6px;
  --sh-1:0 1px 2px rgba(20,22,27,.05),0 6px 18px rgba(20,22,27,.06);
  --sh-2:0 10px 28px rgba(20,22,27,.12);
  --tr:.22s ease;
  --maxw:1200px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--t1);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--brand);text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:1px;}
a:hover{color:var(--brand-dark);}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;box-shadow:0 0 0 3px rgba(255,106,26,.22);}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}

/* ============ 顶部信息条 ============ */
.topbar{background:var(--ink);color:var(--td);height:36px;display:flex;align-items:center;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;line-height:1.6;}
.tb-left{display:flex;align-items:center;gap:10px;min-width:0;}
.tb-domain{color:#fff;font-weight:600;letter-spacing:.2px;white-space:nowrap;}
.tb-sep{width:1px;height:14px;background:var(--ink-line);display:inline-block;}
.tb-note{color:var(--td);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.tb-right{display:flex;align-items:center;gap:18px;flex:none;}
.tb-right a{color:var(--td);text-decoration:none;transition:color var(--tr);white-space:nowrap;}
.tb-right a:hover{color:var(--brand);}

/* ============ 主导航 ============ */
.navbar{
  position:sticky;top:0;z-index:60;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow var(--tr);
}
.navbar.scrolled{box-shadow:0 6px 20px rgba(20,22,27,.08);}
.nav-inner{display:flex;align-items:center;gap:28px;height:68px;}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex:none;}
.logo-mark{
  width:26px;height:26px;display:inline-block;position:relative;
  background:var(--ink);
  clip-path:polygon(25% 0,100% 0,100% 75%,75% 100%,0 100%,0 25%);
}
.logo-mark i{
  position:absolute;left:7px;top:7px;width:12px;height:12px;
  background:var(--brand);display:block;
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
}
.logo-text{font-size:19px;font-weight:800;color:var(--t1);letter-spacing:-.2px;}
.logo:hover .logo-text{color:var(--brand-dark);}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:6px;flex:1;min-width:0;}
.nav-links a{
  position:relative;font-size:15px;font-weight:500;color:var(--t1);
  text-decoration:none;padding:22px 0;transition:color var(--tr);white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform var(--tr);
}
.nav-links a:hover{color:var(--brand);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--brand);font-weight:600;}
.nav-links a.active::after{transform:scaleX(1);}
.nav-cta{flex:none;display:flex;align-items:center;gap:12px;}
.burger{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-btn);
  flex-direction:column;justify-content:center;align-items:center;gap:5px;background:#fff;flex:none;
}
.burger span{display:block;width:18px;height:2px;background:var(--t1);transition:transform var(--tr),opacity var(--tr);}
.burger:hover{border-color:var(--brand);}
.burger:hover span{background:var(--brand);}

/* ============ 移动抽屉 ============ */
.mask{position:fixed;inset:0;background:rgba(14,16,21,.5);opacity:0;visibility:hidden;transition:opacity var(--tr);z-index:80;}
.mask.show{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:360px;background:#fff;z-index:90;
  transform:translateX(102%);transition:transform var(--tr);display:flex;flex-direction:column;
  box-shadow:-12px 0 32px rgba(20,22,27,.16);
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:58px;padding:0 18px;border-bottom:1px solid var(--line);}
.drawer-close{width:36px;height:36px;border:1px solid var(--line);border-radius:var(--r-btn);color:var(--t2);font-size:18px;line-height:1;}
.drawer-nav{flex:1;overflow:auto;}
.drawer-nav a{display:flex;align-items:center;height:52px;padding:0 18px;border-bottom:1px solid var(--line);color:var(--t1);font-size:15px;font-weight:500;text-decoration:none;}
.drawer-nav a.active{color:var(--brand);background:var(--brand-soft);}
.drawer-cta{padding:16px 18px;border-top:1px solid var(--line);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;text-decoration:none;letter-spacing:.2px;
  transition:background var(--tr),color var(--tr),border-color var(--tr),transform var(--tr),box-shadow var(--tr);
  white-space:nowrap;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}
.btn-primary{
  background:var(--brand);color:#fff;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
}
.btn-primary:hover{background:var(--brand-dark);color:#fff;clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,14px 100%,0 calc(100% - 14px));}
.btn-primary:active{background:#BF4708;}
.btn-primary:focus-visible{box-shadow:inset 0 0 0 2px rgba(255,255,255,.7);}
.btn-ghost{background:transparent;border:1.5px solid var(--brand);color:var(--brand);}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-dark);border-color:var(--brand-dark);}
.btn-ghost:active{background:#FFE6D2;}
.btn-light{background:transparent;border:1.5px solid rgba(255,255,255,.32);color:#fff;}
.btn-light:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.6);color:#fff;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;pointer-events:none;}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;
  font-size:15px;text-decoration:none;background:none;
}
.btn-text i{font-style:normal;transition:transform var(--tr);}
.btn-text:hover i{transform:translateX(3px);}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-badge);
  font-size:12px;font-weight:600;letter-spacing:.2px;
}
.badge-cyan{background:var(--cyan-soft);color:#0F8C80;}
.badge-purple{background:var(--purple-soft);color:#4B31C4;}
.badge-soft{background:var(--soft);color:var(--t2);font-weight:500;}
.badge-brand{background:var(--brand-soft);color:var(--brand-dark);}

/* ============ 面包屑 ============ */
.crumb{padding:22px 0 0;font-size:13px;color:var(--t3);display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.crumb a{color:var(--brand);text-decoration:none;}
.crumb a:hover{color:var(--brand-dark);text-decoration:underline;}
.crumb .sep{color:#C4C9D4;}
.crumb .cur{color:var(--t3);max-width:340px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:inline-block;vertical-align:bottom;}

/* ============ 文章标题区 ============ */
.art-head{background:#fff;border-bottom:1px solid var(--line);padding:24px 0 34px;margin-top:22px;}
.art-head .badges{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px;}
.art-head h1{
  font-size:44px;font-weight:800;line-height:1.18;letter-spacing:-.4px;color:var(--t1);
  max-width:960px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.art-meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:16px;font-size:13px;color:var(--t3);}
.art-meta span{display:inline-flex;align-items:center;gap:6px;}
.art-meta .dot{width:5px;height:5px;border-radius:50%;background:var(--brand);display:inline-block;}

/* ============ 文章主体 ============ */
.article-section{padding:48px 0 80px;}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start;}
.article-body{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:40px 44px 36px;box-shadow:var(--sh-1);
  max-width:820px;margin:0 auto;width:100%;
  font-size:16px;line-height:1.9;color:var(--t1);
  overflow-wrap:break-word;word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;max-width:780px;}
.article-body h2{
  position:relative;font-size:32px;font-weight:700;line-height:1.3;color:var(--t1);
  margin:1.6em 0 .7em;padding-left:16px;scroll-margin-top:96px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;background:var(--brand);border-radius:2px;
}
.article-body h3{font-size:21px;font-weight:600;line-height:1.4;margin:1.4em 0 .6em;color:var(--t1);scroll-margin-top:96px;}
.article-body h4{font-size:17px;font-weight:600;margin:1.2em 0 .5em;}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--brand-dark);}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:0;}
.article-body ul li{position:relative;padding-left:20px;margin:0 0 .55em;}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;background:var(--brand);border-radius:1px;
}
.article-body ol{counter-reset:item;}
.article-body ol li{position:relative;padding-left:26px;margin:0 0 .55em;counter-increment:item;}
.article-body ol li::before{
  content:counter(item);position:absolute;left:0;top:.2em;width:18px;height:18px;border-radius:4px;
  background:var(--brand-soft);color:var(--brand-dark);font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;line-height:1;
}
.article-body blockquote{
  margin:1.4em 0;padding:16px 20px;background:#FFF7F1;border-left:4px solid var(--brand);
  border-radius:0 var(--r-badge) var(--r-badge) 0;color:var(--t2);font-style:normal;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{margin:1.4em 0 .6em;width:100%;}
.article-body figure{margin:1.4em 0;}
.article-body figcaption{font-size:13px;color:var(--t3);text-align:center;margin-top:8px;line-height:1.6;}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.4em 0;font-size:14px;
  border:1px solid var(--line);border-radius:var(--r-badge);overflow:hidden;
}
.article-body th{background:var(--soft);font-weight:600;text-align:left;color:var(--t1);}
.article-body th,.article-body td{border:1px solid var(--line);padding:11px 14px;line-height:1.7;}
.article-body tbody tr:hover{background:#FAFBFC;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0;}
.article-body code{
  background:var(--soft);border:1px solid var(--line);border-radius:6px;padding:1px 6px;
  font-size:.9em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body pre{
  background:var(--ink-2);color:var(--td);border-radius:var(--r-img);padding:18px;
  overflow-x:auto;font-size:14px;line-height:1.7;margin:1.4em 0;
  border:1px solid var(--ink-line);
}
.article-body pre code{background:none;border:0;color:inherit;padding:0;}

/* ============ 文章尾部 ============ */
.article-foot{margin-top:36px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:32px 44px 34px;box-shadow:var(--sh-1);max-width:820px;margin-left:auto;margin-right:auto;width:100%;}
.tag-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.tag-row .tag-label{font-size:13px;color:var(--t3);}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:999px;
  background:var(--soft);color:var(--t2);font-size:13px;text-decoration:none;transition:background var(--tr),color var(--tr);
}
.tag:hover{background:var(--brand-soft);color:var(--brand-dark);}
.sep-line{height:1px;background:var(--line);margin:26px 0;}
.block-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px;}
.block-head .bh-left{display:flex;align-items:center;gap:12px;}
.block-head .bar{width:4px;height:22px;background:var(--brand);border-radius:2px;display:inline-block;}
.block-head h2{font-size:24px;font-weight:700;line-height:1.3;}
.block-head .sub{font-size:15px;color:var(--t3);margin-top:4px;}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.rel-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;text-decoration:none;color:inherit;
  transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#DCE0E8;color:inherit;}
.rel-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--soft);}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.rel-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-card h3{font-size:17px;font-weight:600;line-height:1.45;color:var(--t1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-card p{font-size:14px;color:var(--t2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-card .meta{margin-top:auto;font-size:13px;color:var(--t3);display:flex;align-items:center;gap:10px;}
.foot-back{margin-top:26px;}

/* ============ 侧栏 ============ */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.side-box{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:22px 22px 20px;box-shadow:var(--sh-1);}
.side-box h3{font-size:15px;font-weight:700;color:var(--t1);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-box h3::before{content:"";width:4px;height:15px;background:var(--brand);border-radius:2px;display:inline-block;}
.toc ul li a{
  display:block;position:relative;padding:7px 0 7px 14px;font-size:14px;color:var(--t2);
  text-decoration:none;line-height:1.6;border-radius:6px;transition:color var(--tr),background var(--tr);
}
.toc ul li a::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:2px;background:transparent;border-radius:2px;transition:background var(--tr);
}
.toc ul li a:hover{color:var(--brand);background:#FAFBFC;}
.toc ul li a.active{color:var(--brand);font-weight:600;background:var(--brand-soft);}
.toc ul li a.active::before{background:var(--brand);}
.hot-list li + li{border-top:1px solid var(--line);}
.hot-list a{display:block;padding:11px 0;font-size:14px;color:var(--t1);text-decoration:none;line-height:1.6;transition:color var(--tr);}
.hot-list a:hover{color:var(--brand);}
.hot-list .idx{color:var(--brand);font-weight:700;font-size:13px;margin-right:8px;font-variant-numeric:tabular-nums;}
.side-note{background:var(--ink);color:var(--td);border-radius:var(--r-card);padding:22px;border-top:2px solid var(--brand);}
.side-note b{color:#fff;display:block;font-size:15px;margin-bottom:8px;}
.side-note p{font-size:13px;line-height:1.7;margin-bottom:16px;color:var(--td);}
.is-hidden{display:none !important;}

/* ============ 空态 ============ */
.empty{
  text-align:center;padding:64px 24px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);max-width:820px;margin:0 auto;box-shadow:var(--sh-1);
}
.empty-ico{
  width:56px;height:56px;margin:0 auto 20px;border:1.5px solid var(--line);border-radius:16px;
  position:relative;background:var(--soft);
}
.empty-ico::before{content:"";position:absolute;left:16px;top:18px;width:24px;height:2px;background:var(--t3);}
.empty-ico::after{content:"";position:absolute;left:16px;top:26px;width:16px;height:2px;background:var(--t3);}
.empty-main{font-size:19px;font-weight:700;color:var(--t1);margin-bottom:8px;}
.empty-sub{font-size:14px;color:var(--t3);margin-bottom:22px;}

/* ============ CTA 横幅 ============ */
.cta-band{background:var(--ink);position:relative;overflow:hidden;}
.cta-band::after{
  content:"";position:absolute;inset:0;opacity:.05;pointer-events:none;
  background-image:linear-gradient(var(--ink-line) 1px,transparent 1px),linear-gradient(90deg,var(--ink-line) 1px,transparent 1px);
  background-size:56px 56px;
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;min-height:200px;padding:44px 0;}
.cta-inner h2{color:#fff;font-size:32px;font-weight:700;line-height:1.3;letter-spacing:-.3px;}
.cta-inner p{color:var(--td);font-size:15px;margin-top:10px;}
.cta-inner .cta-btns{display:flex;gap:14px;flex:none;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.footer{background:var(--ink);color:var(--td);padding:64px 0 28px;}
.f-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;}
.f-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.3px;}
.f-col ul li{margin-bottom:10px;font-size:14px;line-height:1.7;}
.f-col ul li a{color:var(--td);text-decoration:none;transition:color var(--tr);}
.f-col ul li a:hover{color:var(--brand);}
.f-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.f-brand b{color:#fff;font-size:18px;font-weight:800;letter-spacing:-.2px;}
.f-col p{font-size:14px;line-height:1.8;color:var(--td);max-width:340px;}
.f-legal{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--ink-line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#8B93A5;
}
.f-col h4.toggle{cursor:default;}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .article-grid{grid-template-columns:minmax(0,1fr) 280px;gap:32px;}
  .nav-inner{gap:20px;}
  .nav-links{gap:20px;}
}
@media (max-width:1023px){
  .article-grid{grid-template-columns:minmax(0,1fr);}
  .article-side{position:static;display:none;}
  .article-body{padding:32px 30px 30px;}
  .article-foot{padding:28px 30px 30px;}
  .art-head h1{font-size:34px;}
  .f-top{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-inner{flex-direction:column;align-items:flex-start;text-align:left;}
  .cta-inner h2{font-size:26px;}
}
@media (max-width:767px){
  body{font-size:15px;}
  .container{padding:0 18px;}
  .topbar{height:32px;}
  .tb-note{display:none;}
  .tb-sep{display:none;}
  .tb-right a:nth-child(2){display:none;}
  .nav-inner{height:58px;gap:14px;}
  .nav-links,.nav-cta{display:none;}
  .burger{display:flex;}
  .logo-text{font-size:17px;}
  .art-head{padding:18px 0 26px;margin-top:16px;}
  .art-head h1{font-size:30px;-webkit-line-clamp:3;}
  .art-meta{gap:12px;}
  .article-section{padding:32px 0 56px;}
  .article-body{padding:24px 18px 22px;font-size:15px;border-radius:var(--r-card);}
  .article-body h2{font-size:24px;}
  .article-body h3{font-size:18px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
  .article-foot{padding:24px 18px 26px;}
  .rel-grid{grid-template-columns:1fr;}
  .cta-inner{padding:36px 0;min-height:0;}
  .cta-inner h2{font-size:22px;}
  .cta-inner .cta-btns{width:100%;}
  .cta-inner .cta-btns .btn{width:100%;}
  .footer{padding:44px 0 22px;}
  .f-top{grid-template-columns:1fr;gap:0;}
  .f-col{border-bottom:1px solid var(--ink-line);}
  .f-col h4{margin:0;padding:16px 0;display:flex;align-items:center;justify-content:space-between;cursor:pointer;}
  .f-col h4::after{content:"+";color:var(--td);font-size:16px;font-weight:400;}
  .f-col.open h4::after{content:"−";}
  .f-col ul,.f-col p,.f-col .f-brand{display:none;}
  .f-col.open ul,.f-col.open p{display:block;}
  .f-col.open .f-brand{display:flex;}
  .f-col ul{padding-bottom:12px;}
  .f-col p{padding-bottom:16px;}
  .f-col.open h4{padding-bottom:12px;}
  .f-legal{margin-top:24px;flex-direction:column;align-items:flex-start;gap:6px;}
}
@media (max-width:479px){
  .art-head h1{font-size:28px;}
  .btn{width:100%;}
  .btn-sm{width:auto;}
  .rel-card h3{font-size:16px;}
}

/* roulang page: category1 */
/* ============ 1. Reset ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,p,ul,ol,li,figure,table{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
table{border-collapse:collapse;width:100%;}
:focus{outline:none;}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(255,106,26,.22);border-color:#FF6A1A;}

/* ============ 2. 变量 ============ */
:root{
  --c-primary:#FF6A1A;
  --c-primary-dark:#D8520A;
  --c-primary-soft:#FFF3EA;
  --c-primary-tint:#FFF7F1;
  --c-cyan:#17C3B2;
  --c-cyan-soft:#E6F8F6;
  --c-purple:#6C4CF1;
  --c-purple-soft:#EFEBFF;
  --c-dark:#0E1015;
  --c-dark-2:#171A22;
  --c-dark-line:#262A35;
  --c-bg:#F5F6F8;
  --c-card:#FFFFFF;
  --c-soft:#F0F2F5;
  --t-1:#14161B;
  --t-2:#5A6172;
  --t-3:#8C93A3;
  --t-dark:#C9CEDA;
  --c-border:#E6E9EF;
  --c-success:#17C3B2;
  --c-warn:#FFB020;
  --c-error:#F04438;
  --c-info:#6C4CF1;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-badge:6px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(20,22,27,.05),0 6px 18px rgba(20,22,27,.06);
  --sh-2:0 10px 28px rgba(20,22,27,.12);
  --sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:24px;--sp-6:32px;--sp-7:48px;--sp-8:64px;--sp-9:96px;
  --sec-pad:88px;
  --ease:.22s ease;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", Roboto, sans-serif;
}

/* ============ 3. 基础排版 ============ */
body{
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--t-1);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{color:var(--t-1);letter-spacing:-.2px;}
h1{font-size:44px;font-weight:800;line-height:1.18;letter-spacing:-.4px;}
h2{font-size:32px;font-weight:700;line-height:1.3;}
h3{font-size:21px;font-weight:600;line-height:1.4;}
p{max-width:780px;}
p + p{margin-top:1.1em;}
strong{font-weight:700;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
a.link{color:var(--c-primary);border-bottom:1px solid rgba(255,106,26,.35);transition:var(--ease);}
a.link:hover{color:var(--c-primary-dark);border-bottom-color:var(--c-primary-dark);}
.small{font-size:13px;line-height:1.6;color:var(--t-3);}

/* ============ 4. 容器与栅格 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.grid{display:grid;gap:24px;}
.g-12{grid-template-columns:repeat(12,1fr);}
.col-7{grid-column:span 7;}
.col-6{grid-column:span 6;}
.col-5{grid-column:span 5;}
.section{padding:var(--sec-pad) 0;}
.section-soft{background:var(--c-soft);}
.section-dark{background:var(--c-dark);color:var(--t-dark);}
.section-dark h2,.section-dark h3{color:#fff;}

/* 区块标题 */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.sec-title{position:relative;padding-left:16px;}
.sec-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;background:var(--c-primary);border-radius:2px;}
.sec-title h2{font-size:32px;}
.sec-sub{margin-top:6px;font-size:15px;color:var(--t-2);max-width:640px;}
.sec-dark .sec-sub{color:#9AA2B4;}
.sec-more{font-size:15px;font-weight:600;color:var(--c-primary);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.sec-more .arrow{transition:var(--ease);}
.sec-more:hover .arrow{transform:translateX(3px);}

/* ============ 5. 顶部信息条 ============ */
.info-bar{height:36px;background:var(--c-dark);color:var(--t-dark);font-size:13px;}
.info-inner{height:36px;display:flex;align-items:center;justify-content:space-between;gap:16px;}
.info-left{display:flex;align-items:center;gap:10px;min-width:0;}
.info-left .dom{color:#fff;font-weight:600;letter-spacing:.2px;}
.info-left .bar{width:1px;height:12px;background:#3A3F4D;}
.info-left .tip{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.info-right{display:flex;align-items:center;gap:18px;white-space:nowrap;}
.info-right a{transition:var(--ease);}
.info-right a:hover{color:var(--c-primary);}

/* ============ 6. 主导航 ============ */
.navbar{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--c-border);transition:box-shadow var(--ease);}
.navbar.scrolled{box-shadow:0 6px 18px rgba(20,22,27,.08);}
.nav-inner{height:68px;display:flex;align-items:center;gap:28px;}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{width:26px;height:26px;background:var(--c-dark);display:grid;place-items:center;clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);}
.logo-mark i{display:block;width:10px;height:10px;background:var(--c-primary);clip-path:polygon(0 0,100% 0,100% 60%,60% 100%,0 100%);}
.logo-text{font-size:18px;font-weight:800;letter-spacing:-.2px;color:var(--t-1);}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-links a{position:relative;font-size:15px;font-weight:500;color:var(--t-2);padding:22px 0;transition:var(--ease);}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:16px;height:2px;background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform var(--ease);}
.nav-links a:hover{color:var(--t-1);}
.nav-links a.active{color:var(--c-primary);font-weight:600;}
.nav-links a.active::after{transform:scaleX(1);}
.nav-cta{flex:0 0 auto;margin-left:8px;}
.burger{display:none;width:40px;height:40px;flex-direction:column;justify-content:center;align-items:center;gap:5px;border-radius:8px;}
.burger span{display:block;width:20px;height:2px;background:var(--t-1);transition:var(--ease);}
.burger:hover{background:var(--c-soft);}

/* 移动抽屉 */
.overlay{position:fixed;inset:0;background:rgba(14,16,21,.5);opacity:0;visibility:hidden;transition:var(--ease);z-index:80;}
.overlay.open{opacity:1;visibility:visible;}
.drawer{position:fixed;top:0;right:0;height:100%;width:82%;max-width:360px;background:#fff;z-index:90;transform:translateX(100%);transition:transform .28s ease;display:flex;flex-direction:column;}
.drawer.open{transform:translateX(0);}
.drawer-head{height:58px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;border-bottom:1px solid var(--c-border);}
.drawer-close{width:36px;height:36px;border-radius:8px;font-size:22px;line-height:1;color:var(--t-2);}
.drawer-close:hover{background:var(--c-soft);color:var(--t-1);}
.drawer-links{flex:1;overflow-y:auto;padding:8px 0;}
.drawer-links a{display:flex;align-items:center;height:52px;padding:0 18px;font-size:15px;font-weight:500;color:var(--t-1);border-bottom:1px solid var(--c-border);transition:var(--ease);}
.drawer-links a:hover{background:var(--c-soft);}
.drawer-links a.active{color:var(--c-primary);box-shadow:inset 3px 0 0 var(--c-primary);background:var(--c-primary-soft);}
.drawer-foot{padding:16px 18px;border-top:1px solid var(--c-border);}

/* ============ 7. 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;line-height:1;transition:var(--ease);white-space:nowrap;cursor:pointer;}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-lg{height:52px;padding:0 30px;font-size:16px;}
.btn-block{width:100%;}
.btn-primary{background:var(--c-primary);color:#fff;clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);}
.btn-primary:hover{background:var(--c-primary-dark);clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,0 100%);}
.btn-primary:active{background:#C14408;}
.btn-primary[disabled],.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed;pointer-events:none;}
.btn-ghost{background:transparent;color:var(--c-primary);border:1.5px solid var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-soft);border-color:var(--c-primary-dark);color:var(--c-primary-dark);}
.btn-dark-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.3);}
.btn-dark-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-weight:600;font-size:15px;padding:0;}
.btn-text .arrow{transition:transform var(--ease);}
.btn-text:hover .arrow{transform:translateX(3px);}

/* ============ 8. 徽章与标签 ============ */
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;font-size:12px;font-weight:600;border-radius:var(--r-badge);line-height:1;letter-spacing:.2px;}
.badge-cyan{background:var(--c-cyan-soft);color:#0E8F83;}
.badge-orange{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.badge-purple{background:var(--c-purple-soft);color:#5A3CE0;}
.badge-gray{background:var(--c-soft);color:var(--t-2);}
.badge-pill{border-radius:999px;}
.tag-line{display:flex;flex-wrap:wrap;gap:8px;}

/* ============ 9. 面包屑 ============ */
.crumb{font-size:13px;color:#8C93A3;display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.crumb a{color:#8C93A3;transition:var(--ease);}
.crumb a:hover{color:var(--c-primary);}
.crumb .sep{opacity:.6;}
.crumb .cur{color:#C9CEDA;}

/* ============ 10. 分类 Hero（暗区 280px） ============ */
.cat-hero{background:var(--c-dark);color:var(--t-dark);position:relative;overflow:hidden;}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.5;
  mask-image:linear-gradient(to right,#000,transparent 78%);
  -webkit-mask-image:linear-gradient(to right,#000,transparent 78%);
  pointer-events:none;
}
.cat-hero-inner{position:relative;min-height:280px;display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center;padding:44px 0;}
.cat-hero .crumb{margin-bottom:14px;}
.cat-hero h1{color:#fff;font-size:40px;}
.cat-hero h1 em{font-style:normal;color:var(--c-primary);}
.cat-hero .lead{margin-top:14px;font-size:15px;line-height:1.8;color:var(--t-dark);max-width:600px;}
.cat-hero .hero-tags{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px;}
.hero-tag{display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;font-size:13px;border:1px solid var(--c-dark-line);color:var(--t-dark);border-radius:6px;background:var(--c-dark-2);}
.hero-tag i{width:6px;height:6px;background:var(--c-cyan);display:block;border-radius:1px;}
.hero-media{position:relative;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--c-dark-line);clip-path:polygon(18px 0,100% 0,100% 100%,0 100%,0 18px);}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-media::after{content:"";position:absolute;inset:0;background:rgba(14,16,21,.2);}

/* ============ 11. 数据指标块 ============ */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;}
.metric{padding:26px 24px;border-right:1px solid var(--c-border);}
.metric:last-child{border-right:0;}
.metric .v{font-size:32px;font-weight:800;color:var(--c-primary);line-height:1.1;letter-spacing:-.5px;}
.metric .v.cyan{color:var(--c-cyan);}
.metric .k{margin-top:8px;font-size:13px;color:var(--t-3);line-height:1.5;}

/* ============ 12. 筛选标签行 ============ */
.filter-bar{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;margin-bottom:32px;-webkit-overflow-scrolling:touch;}
.filter-bar::-webkit-scrollbar{height:0;}
.chip{flex:0 0 auto;display:inline-flex;align-items:center;height:38px;padding:0 18px;border-radius:999px;border:1px solid var(--c-border);background:#fff;font-size:14px;font-weight:500;color:var(--t-2);transition:var(--ease);}
.chip:hover{border-color:var(--c-primary);color:var(--c-primary);}
.chip.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:600;}

/* ============ 13. 卡片 ============ */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);transition:transform var(--ease),box-shadow var(--ease);display:flex;flex-direction:column;}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.card-cover{border-radius:var(--r-img);overflow:hidden;margin:-4px 0 18px;background:var(--c-soft);}
.card-cover img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s ease;}
.card:hover .card-cover img{transform:scale(1.03);}
.card .badge{align-self:flex-start;margin-bottom:12px;}
.card h3{font-size:19px;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-desc{font-size:14px;line-height:1.8;color:var(--t-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;max-width:100%;}
.card-points{margin-top:14px;display:flex;flex-direction:column;gap:8px;}
.card-points li{position:relative;padding-left:16px;font-size:13px;color:var(--t-2);line-height:1.6;}
.card-points li::before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;background:var(--c-primary);border-radius:1px;}
.card-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--c-border);display:flex;align-items:center;justify-content:space-between;gap:12px;}
.card-foot .meta{font-size:12px;color:var(--t-3);}
.card-foot a{font-size:14px;font-weight:600;color:var(--c-primary);display:inline-flex;align-items:center;gap:5px;white-space:nowrap;}
.card-foot a .arrow{transition:transform var(--ease);}
.card-foot a:hover .arrow{transform:translateX(3px);}
.card.is-hidden{display:none;}

/* ============ 14. 双栏图文 + 列表项 ============ */
.split{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;}
.split .media{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--c-border);}
.split .media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.list-block{display:flex;flex-direction:column;}
.list-item{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--c-border);transition:background var(--ease);}
.list-item:first-child{padding-top:0;}
.list-item:hover{background:#FAFBFC;}
.list-item .bar{flex:0 0 4px;width:4px;background:var(--c-primary);border-radius:2px;align-self:stretch;}
.list-item h3{font-size:17px;margin-bottom:6px;}
.list-item p{font-size:14px;line-height:1.75;color:var(--t-2);max-width:100%;}
.list-item .meta{margin-top:8px;font-size:12px;color:var(--t-3);}

/* ============ 15. 对比表 ============ */
.table-wrap{overflow-x:auto;border:1px solid var(--c-border);border-radius:var(--r-card);background:#fff;box-shadow:var(--sh-1);}
table.compare{min-width:760px;font-size:14px;}
table.compare th,table.compare td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--c-border);vertical-align:top;line-height:1.7;}
table.compare thead th{background:var(--c-soft);font-weight:700;color:var(--t-1);font-size:14px;white-space:nowrap;}
table.compare tbody tr:last-child td{border-bottom:0;}
table.compare tbody tr:hover{background:#FAFBFC;}
table.compare td:first-child{font-weight:700;color:var(--t-1);white-space:nowrap;}
table.compare td{color:var(--t-2);}
.table-note{margin-top:14px;font-size:13px;color:var(--t-3);}

/* ============ 16. CTA 条 ============ */
.cta-bar{background:var(--c-dark);color:var(--t-dark);position:relative;overflow:hidden;}
.cta-bar::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--c-primary);}
.cta-inner{min-height:200px;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:40px 0 40px 24px;}
.cta-inner h2{color:#fff;font-size:28px;}
.cta-inner p{margin-top:10px;font-size:15px;color:#9AA2B4;max-width:560px;}
.cta-actions{display:flex;gap:12px;flex:0 0 auto;}

/* ============ 17. 页脚 ============ */
.footer{background:var(--c-dark);color:var(--t-dark);padding:64px 0 0;}
.f-top{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;border-bottom:1px solid var(--c-dark-line);}
.f-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.f-brand b{color:#fff;font-size:17px;font-weight:800;}
.f-col h4{font-size:14px;color:#fff;font-weight:700;margin-bottom:16px;letter-spacing:.3px;}
.f-col p{font-size:14px;line-height:1.8;color:var(--t-dark);max-width:100%;}
.f-col ul{display:flex;flex-direction:column;gap:10px;}
.f-col ul li{font-size:14px;color:var(--t-dark);line-height:1.6;}
.f-col ul a{font-size:14px;color:var(--t-dark);transition:var(--ease);}
.f-col ul a:hover{color:var(--c-primary);}
.f-legal{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px 0;font-size:13px;color:#8C93A3;flex-wrap:wrap;}

/* ============ 18. 状态样式 ============ */
.empty{padding:56px 24px;text-align:center;background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);}
.empty .ico{width:44px;height:44px;margin:0 auto 14px;border-radius:10px;border:2px solid var(--c-border);position:relative;}
.empty .ico::after{content:"";position:absolute;left:10px;right:10px;top:50%;height:2px;background:var(--c-border);}
.empty p{font-size:15px;font-weight:600;color:var(--t-1);max-width:100%;}
.empty span{display:block;margin-top:6px;font-size:13px;color:var(--t-3);}
.alert{display:flex;gap:10px;align-items:flex-start;padding:14px 16px;border-radius:10px;background:#FEF3F2;border-left:4px solid var(--c-error);font-size:14px;color:#8A2C22;line-height:1.7;}

/* ============ 19. 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;}
.reveal.in{opacity:1;transform:none;}

/* ============ 20. 响应式 ============ */
@media (max-width:1279px){
  :root{--sec-pad:72px;}
  .container{max-width:100%;}
  .nav-links{gap:20px;}
}
@media (max-width:1023px){
  :root{--sec-pad:64px;}
  h1{font-size:34px;}
  .cat-hero h1{font-size:32px;}
  .cat-hero-inner{grid-template-columns:1fr;gap:28px;padding:36px 0;}
  .hero-media{max-width:520px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .split{grid-template-columns:1fr;gap:32px;}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .metric:nth-child(2){border-right:0;}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--c-border);}
  .f-top{grid-template-columns:1fr 1fr;gap:32px;}
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .burger{display:flex;margin-left:auto;}
}
@media (max-width:767px){
  :root{--sec-pad:48px;}
  .container{padding:0 18px;}
  body{font-size:15px;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  .sec-title h2{font-size:24px;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px;}
  .cat-hero::before{display:none;}
  .cat-hero h1{font-size:28px;}
  .info-right a:nth-child(2){display:none;}
  .card-grid{grid-template-columns:1fr;}
  .metrics{grid-template-columns:1fr;}
  .metric{border-right:0;border-bottom:1px solid var(--c-border);}
  .metric:last-child{border-bottom:0;}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:36px 0 36px 18px;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .f-top{grid-template-columns:1fr;gap:0;padding-bottom:16px;}
  .f-col{border-bottom:1px solid var(--c-dark-line);padding:16px 0;}
  .f-col h4{margin-bottom:0;position:relative;cursor:pointer;}
  .f-col h4::after{content:"+";position:absolute;right:0;top:-2px;font-size:18px;color:#8C93A3;transition:var(--ease);}
  .f-col.open h4::after{content:"–";}
  .f-col ul,.f-col p{display:none;margin-top:14px;}
  .f-col.open ul,.f-col.open p{display:flex;}
  .f-col.open p{display:block;}
  .btn{width:100%;}
  .btn-sm{width:auto;}
  .card-foot .btn{width:auto;}
}
@media (max-width:479px){
  h1{font-size:28px;}
  .cat-hero h1{font-size:26px;}
  .filter-bar{flex-wrap:nowrap;}
  .info-left .tip{display:none;}
  .info-left .bar{display:none;}
}

/* roulang page: category2 */
/* ============ 1. reset ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font:inherit;}
table{border-collapse:collapse;width:100%;}

/* ============ 2. 变量 ============ */
:root{
  --orange:#FF6A1A;
  --orange-dark:#D8520A;
  --orange-soft:#FFF3EA;
  --orange-tint:#FFF7F1;
  --cyan:#17C3B2;
  --cyan-soft:#E6F8F6;
  --purple:#6C4CF1;
  --purple-soft:#EFEBFF;
  --dark:#0E1015;
  --dark-2:#171A22;
  --dark-line:#262A35;
  --bg:#F5F6F8;
  --card:#FFFFFF;
  --block:#F0F2F5;
  --text:#14161B;
  --text-2:#5A6172;
  --text-3:#8C93A3;
  --dark-text:#C9CEDA;
  --dark-title:#FFFFFF;
  --border:#E6E9EF;
  --ok:#17C3B2;
  --warn:#FFB020;
  --err:#F04438;
  --info:#6C4CF1;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-badge:6px;
  --r-img:12px;
  --shadow:0 1px 2px rgba(20,22,27,.05),0 6px 18px rgba(20,22,27,.06);
  --shadow-hover:0 10px 28px rgba(20,22,27,.12);
  --focus-ring:0 0 0 3px rgba(255,106,26,.22);
  --t:.22s ease;
}

/* ============ 3. base ============ */
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{line-height:1.3;color:var(--text);}
h1{font-size:44px;font-weight:800;line-height:1.18;letter-spacing:-.4px;}
h2{font-size:32px;font-weight:700;}
h3{font-size:21px;font-weight:600;line-height:1.4;}
p{max-width:780px;}
strong{font-weight:700;}
::selection{background:var(--orange);color:#fff;}

/* ============ 4. 布局容器 ============ */
.container{max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section-alt{background:#fff;}
.section-blockbg{background:var(--block);}
.section-dark{background:var(--dark);color:var(--dark-text);}
.section-dark h2,.section-dark h3{color:var(--dark-title);}

/* ============ 5. 顶部信息条 ============ */
.topbar{background:var(--dark);height:36px;display:flex;align-items:center;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;}
.tb-left{display:flex;align-items:center;gap:12px;min-width:0;}
.tb-domain{font-size:13px;line-height:1.6;color:var(--dark-title);font-weight:600;letter-spacing:.2px;font-variant-numeric:tabular-nums;}
.tb-sep{width:1px;height:12px;background:var(--dark-line);flex:none;}
.tb-note{font-size:13px;line-height:1.6;color:var(--text-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.tb-right{display:flex;align-items:center;gap:20px;flex:none;}
.tb-right a{font-size:13px;line-height:1.6;color:var(--dark-text);transition:color var(--t);}
.tb-right a:hover{color:var(--orange);}

/* ============ 6. 主导航 ============ */
.navbar{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--border);
  transition:box-shadow var(--t);
}
.navbar.is-scrolled{box-shadow:0 6px 20px rgba(20,22,27,.08);}
.nav-inner{display:flex;align-items:center;height:68px;gap:28px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none;}
.logo-mark{
  width:26px;height:26px;flex:none;position:relative;display:block;
  background:linear-gradient(135deg,var(--orange),var(--orange-dark));
  clip-path:polygon(24% 0,100% 0,76% 100%,0 100%);
}
.logo-mark i{position:absolute;left:9px;top:8px;width:8px;height:8px;background:var(--dark);border-radius:2px;}
.logo-text{font-size:18px;font-weight:800;letter-spacing:-.2px;color:var(--text);white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:auto;}
.nav-links a{
  position:relative;font-size:15px;font-weight:500;color:var(--text-2);
  padding:8px 0;transition:color var(--t);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--orange);transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-links a:hover{color:var(--text);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--orange);}
.nav-links a.active::after{transform:scaleX(1);}
.nav-cta{flex:none;}
.burger{
  display:none;width:40px;height:40px;border-radius:var(--r-btn);
  border:1px solid var(--border);align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.burger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:var(--t);}

/* ============ 7. 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;font-size:15px;font-weight:600;line-height:1;
  border-radius:var(--r-btn);border:0;cursor:pointer;
  transition:background var(--t),color var(--t),border-color var(--t),box-shadow var(--t),transform var(--t);
  white-space:nowrap;
}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn-primary{
  background:var(--orange);color:#fff;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
}
.btn-primary:hover{background:var(--orange-dark);clip-path:polygon(0 0,calc(100% - 15px) 0,100% 15px,100% 100%,0 100%);}
.btn-primary:focus-visible{outline:none;box-shadow:inset 0 0 0 3px rgba(255,255,255,.6);}
.btn-ghost{
  background:transparent;color:var(--orange);border:1.5px solid var(--orange);
}
.btn-ghost:hover{background:var(--orange-soft);}
.btn-ghost:focus-visible{outline:none;box-shadow:var(--focus-ring);}
.btn-ghost-dark{
  background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.3);
}
.btn-ghost-dark:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.55);}
.btn-ghost-dark:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(255,106,26,.35);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;pointer-events:none;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--orange);
}
.link-arrow .arrow{display:inline-block;transition:transform var(--t);}
.link-arrow:hover .arrow{transform:translateX(3px);}
.link-arrow:focus-visible{outline:none;box-shadow:var(--focus-ring);border-radius:6px;}

/* 正文链接 */
.rich a{color:var(--orange);text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:1px;}

/* ============ 8. 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  font-size:12px;line-height:1;border-radius:var(--r-badge);
  background:var(--cyan-soft);color:#0E8D82;font-weight:600;
}
.badge-purple{background:var(--purple-soft);color:#4B31C4;}
.badge-orange{background:var(--orange-soft);color:var(--orange-dark);}
.badge-pill{border-radius:999px;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;font-size:13px;
  border-radius:999px;background:#fff;border:1px solid var(--border);color:var(--text-2);
  transition:var(--t);
}
.tag:hover{border-color:var(--orange);color:var(--orange);}
.tag.is-active{background:var(--orange);border-color:var(--orange);color:#fff;}
.chip-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.chip{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;font-size:12px;font-weight:600;
  border-radius:var(--r-badge);background:var(--block);color:var(--text-2);
}
.chip-cyan{background:var(--cyan-soft);color:#0E8D82;}

/* ============ 9. Hero（分类页 · 左图右文） ============ */
.hero-cat2{
  position:relative;background:var(--dark);color:var(--dark-text);
  padding:64px 0 0;overflow:hidden;
}
.hero-cat2::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='104' viewBox='0 0 60 104'%3E%3Cpath d='M30 1 59 18v34L30 69 1 52V18z' fill='none' stroke='%23FF6A1A' stroke-opacity='.06'/%3E%3Cpath d='M30 53l29 17v34L30 121 1 104V70z' fill='none' stroke='%23FF6A1A' stroke-opacity='.06'/%3E%3C/svg%3E");
  background-size:60px 104px;
}
.hero-grid{position:relative;display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center;padding-bottom:56px;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);
  border:1px solid var(--dark-line);
}
.hero-visual::after{
  content:"";position:absolute;inset:0;border-radius:var(--r-img);
  background:rgba(14,16,21,.2);pointer-events:none;
}
.hero-visual-tag{
  position:absolute;left:14px;bottom:14px;z-index:2;
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  font-size:12px;font-weight:600;color:#fff;background:rgba(23,195,178,.22);
  border:1px solid rgba(23,195,178,.5);border-radius:var(--r-badge);backdrop-filter:blur(2px);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;line-height:1.6;color:var(--cyan);font-weight:600;margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--cyan);display:block;}
.hero-cat2 h1{color:var(--dark-title);margin-bottom:16px;}
.hero-cat2 h1 em{font-style:normal;color:var(--orange);}
.hero-sub{font-size:18px;line-height:1.7;color:var(--dark-text);max-width:560px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px;}
.hero-points{display:flex;flex-wrap:wrap;gap:18px;font-size:13px;color:var(--text-3);}
.hero-points li{display:inline-flex;align-items:center;gap:8px;}
.hero-points li::before{
  content:"";width:10px;height:10px;background:var(--orange);
  clip-path:polygon(25% 0,100% 0,75% 100%,0 100%);flex:none;
}
.hero-strip{
  position:relative;display:grid;grid-template-columns:repeat(3,1fr);
  border-top:1px solid var(--dark-line);background:var(--dark-2);
  border-radius:var(--r-card) var(--r-card) 0 0;
}
.hero-strip .hs{
  display:flex;align-items:center;gap:12px;padding:20px 24px;
  border-right:1px solid var(--dark-line);
}
.hero-strip .hs:last-child{border-right:0;}
.hs-icon{
  width:26px;height:26px;flex:none;border-radius:7px;background:rgba(23,195,178,.16);
  display:inline-flex;align-items:center;justify-content:center;
}
.hs-icon::before{content:"";width:8px;height:8px;background:var(--cyan);border-radius:2px;}
.hs b{display:block;font-size:14px;color:var(--dark-title);font-weight:600;line-height:1.5;}
.hs span{display:block;font-size:12px;color:var(--text-3);line-height:1.5;}

/* ============ 10. 区块标题 ============ */
.section-head{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;}
.sh-title{position:relative;padding-left:16px;}
.sh-title::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;
  background:var(--orange);border-radius:2px;
}
.section-sub{font-size:15px;line-height:1.7;color:var(--text-2);margin-top:10px;max-width:780px;}
.section-head + .grid-3,.section-head + .mod-list,.section-head + .scene-rail{margin-top:36px;}

/* ============ 11. 模块列表（方案构成） ============ */
.mod-list{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.mod{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow);transition:transform var(--t),box-shadow var(--t);
  position:relative;overflow:hidden;
}
.mod::before{
  content:"";position:absolute;left:0;top:0;height:2px;width:100%;
  background:linear-gradient(90deg,var(--orange) 0%,var(--orange) 32%,transparent 32%);
}
.mod:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.mod-num{
  display:block;font-size:15px;font-weight:800;color:var(--orange);
  font-variant-numeric:tabular-nums;letter-spacing:.5px;margin-bottom:14px;
}
.mod h3{margin-bottom:10px;}
.mod p{font-size:15px;line-height:1.8;color:var(--text-2);max-width:100%;}

/* ============ 12. 场景横向滚动 ============ */
.scene-rail{
  display:flex;gap:20px;overflow-x:auto;padding:4px 4px 16px;
  scrollbar-width:none;-ms-overflow-style:none;
  scroll-snap-type:x mandatory;
}
.scene-rail::-webkit-scrollbar{display:none;}
.scene-rail:focus-visible{outline:none;box-shadow:var(--focus-ring);border-radius:var(--r-card);}
.scene-card{
  flex:0 0 560px;scroll-snap-align:start;
  display:grid;grid-template-columns:40% 1fr;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow);transition:transform var(--t),box-shadow var(--t);
}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.scene-fig{position:relative;min-height:200px;}
.scene-fig img{width:100%;height:100%;object-fit:cover;}
.scene-body{padding:24px;display:flex;flex-direction:column;gap:10px;}
.scene-card:nth-child(even) .scene-fig{order:2;}
.scene-card:nth-child(even) .scene-body{order:1;}
.scene-body h3{font-size:19px;}
.scene-body p{font-size:14px;line-height:1.8;color:var(--text-2);max-width:100%;}
.scene-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  gap:12px;font-size:13px;color:var(--text-3);padding-top:12px;border-top:1px solid var(--border);
}
.rail-hint{font-size:13px;color:var(--text-3);margin-top:6px;}

/* ============ 13. 案例宽卡 ============ */
.case-list{display:flex;flex-direction:column;gap:24px;}
.case-card{
  display:grid;grid-template-columns:5fr 7fr;gap:28px;align-items:center;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow);transition:transform var(--t),box-shadow var(--t);
}
.case-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.case-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);}
.case-info h3{margin:12px 0 10px;}
.case-info p{font-size:15px;line-height:1.8;color:var(--text-2);max-width:100%;}
.metric-row{
  display:grid;grid-template-columns:repeat(3,1fr);margin-top:18px;
  border-top:1px solid var(--border);padding-top:16px;
}
.metric{padding-right:16px;border-right:1px solid var(--border);}
.metric:last-child{border-right:0;padding-right:0;}
.metric b{
  display:block;font-size:26px;font-weight:800;color:var(--orange);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.metric.metric-cyan b{color:var(--cyan);}
.metric span{display:block;font-size:13px;color:var(--text-3);line-height:1.6;margin-top:4px;}

/* ============ 14. 数据指标条 ============ */
.stat-bar{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:28px 8px;box-shadow:var(--shadow);
}
.stat{padding:0 24px;border-right:1px solid var(--border);}
.stat:last-child{border-right:0;}
.stat b{
  display:block;font-size:32px;font-weight:800;line-height:1.2;color:var(--orange);
  font-variant-numeric:tabular-nums;
}
.stat.stat-cyan b{color:var(--cyan);}
.stat span{display:block;font-size:13px;line-height:1.6;color:var(--text-3);margin-top:6px;}

/* ============ 15. 流程步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;}
.step{position:relative;padding-top:34px;}
.step::before{
  content:"";position:absolute;top:9px;left:18px;right:-20px;height:1px;background:var(--border);
}
.step:last-child::before{display:none;}
.step-dot{
  position:absolute;top:3px;left:0;width:14px;height:14px;border-radius:50%;
  background:#fff;border:2px solid var(--orange);box-shadow:0 0 0 4px rgba(255,106,26,.1);
}
.step-index{
  display:block;font-size:15px;font-weight:800;color:var(--orange);
  font-variant-numeric:tabular-nums;letter-spacing:.5px;margin-bottom:8px;
}
.step h3{font-size:17px;margin-bottom:8px;}
.step p{font-size:14px;line-height:1.8;color:var(--text-2);max-width:100%;}

/* ============ 16. FAQ ============ */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:36px;}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-img);
  overflow:hidden;transition:border-color var(--t),box-shadow var(--t);
}
.faq-item:hover{border-color:#D9DEE8;}
.faq-item.open{border-color:#F3D6C2;box-shadow:var(--shadow);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;text-align:left;font-size:16px;font-weight:600;color:var(--text);
  position:relative;transition:background var(--t),color var(--t);
}
.faq-q:hover{background:var(--orange-soft);}
.faq-q:focus-visible{outline:none;box-shadow:var(--focus-ring);}
.faq-item.open .faq-q{background:var(--orange-tint);color:var(--orange-dark);}
.faq-item.open .faq-q::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:4px;
  background:var(--orange);border-radius:0 2px 2px 0;
}
.faq-arrow{
  width:10px;height:10px;flex:none;border-right:2px solid var(--text-3);
  border-bottom:2px solid var(--text-3);transform:rotate(45deg);
  transition:transform var(--t),border-color var(--t);margin-right:4px;
}
.faq-item.open .faq-arrow{transform:rotate(-135deg);border-color:var(--orange);}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows var(--t);}
.faq-item.open .faq-a{grid-template-rows:1fr;}
.faq-a-inner{overflow:hidden;}
.faq-a-inner p{
  font-size:15px;line-height:1.8;color:var(--text-2);padding:0 20px 20px;max-width:100%;
}

/* ============ 17. CTA 条 ============ */
.cta-bar{
  background:var(--dark);color:var(--dark-text);position:relative;overflow:hidden;
  padding:56px 0;
}
.cta-bar::before{
  content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;
  border:1px solid var(--dark-line);transform:rotate(45deg);pointer-events:none;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;position:relative;}
.cta-inner h2{color:var(--dark-title);margin-bottom:10px;}
.cta-inner p{font-size:15px;line-height:1.8;color:var(--dark-text);max-width:640px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 18. 页脚 ============ */
.footer{background:var(--dark);color:var(--dark-text);padding:64px 0 28px;}
.f-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;}
.f-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.f-brand b{color:var(--dark-title);font-size:17px;font-weight:800;}
.f-col p{font-size:14px;line-height:1.8;color:var(--text-3);max-width:320px;}
.f-col h4{font-size:14px;color:var(--dark-title);font-weight:600;margin-bottom:16px;letter-spacing:.3px;}
.f-col ul li{font-size:14px;line-height:2;color:var(--dark-text);}
.f-col ul li a{font-size:14px;line-height:2;color:var(--dark-text);transition:color var(--t);}
.f-col ul li a:hover{color:var(--orange);}
.f-legal{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--dark-line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);line-height:1.7;
}
.f-col h4 .f-toggle{display:none;}

/* ============ 19. 面包屑 ============ */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);line-height:1.6;}
.crumb a{color:var(--text-3);transition:color var(--t);}
.crumb a:hover{color:var(--orange);}
.crumb .sep{color:#B9C0CD;}
.crumb .now{color:var(--text-2);}

/* ============ 20. 移动抽屉 ============ */
.drawer{
  position:fixed;top:0;right:0;height:100%;width:82%;max-width:360px;background:#fff;z-index:120;
  transform:translateX(100%);transition:transform .26s ease;display:flex;flex-direction:column;
  box-shadow:-10px 0 30px rgba(20,22,27,.16);
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 20px;border-bottom:1px solid var(--border);
}
.drawer-close{
  width:36px;height:36px;border-radius:var(--r-btn);border:1px solid var(--border);
  font-size:20px;line-height:1;color:var(--text-2);
  display:inline-flex;align-items:center;justify-content:center;
}
.drawer-close:hover{border-color:var(--orange);color:var(--orange);}
.drawer-links{flex:1;overflow-y:auto;}
.drawer-links a{
  display:flex;align-items:center;height:52px;padding:0 20px;font-size:15px;font-weight:500;
  color:var(--text-2);border-bottom:1px solid var(--border);transition:var(--t);
}
.drawer-links a:hover{background:var(--block);color:var(--text);}
.drawer-links a.active{color:var(--orange);background:var(--orange-soft);}
.drawer-foot{padding:16px 20px;border-top:1px solid var(--border);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,16,21,.45);z-index:110;
  opacity:0;visibility:hidden;transition:opacity .26s ease,visibility .26s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ============ 21. 响应式 ============ */
@media (max-width:1279px){
  .section{padding:72px 0;}
  .scene-card{flex:0 0 520px;}
}
@media (max-width:1023px){
  h1{font-size:36px;}
  h2{font-size:27px;}
  .section{padding:64px 0;}
  .hero-grid{grid-template-columns:1fr;gap:32px;padding-bottom:44px;}
  .hero-visual{order:2;}
  .hero-copy{order:1;}
  .hero-visual img{aspect-ratio:16/10;}
  .mod-list{grid-template-columns:1fr;}
  .case-card{grid-template-columns:1fr;}
  .stat-bar{grid-template-columns:1fr 1fr;gap:24px 0;padding:24px 0;}
  .stat{padding:0 20px;}
  .stat:nth-child(2){border-right:0;}
  .stat:nth-child(3),.stat:nth-child(4){border-top:1px solid var(--border);padding-top:20px;}
  .steps{grid-template-columns:1fr 1fr;gap:24px;}
  .step::before{display:none;}
  .f-top{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  body{font-size:15px;line-height:1.8;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  h3{font-size:18px;}
  .container{padding:0 18px;}
  .section{padding:48px 0;}
  .nav-inner{height:58px;gap:16px;}
  .nav-links,.nav-cta{display:none;}
  .burger{display:flex;margin-left:auto;}
  .logo-text{font-size:17px;}
  .topbar{height:32px;}
  .tb-note{display:none;}
  .tb-right a:nth-child(2){display:none;}
  .hero-cat2{padding-top:36px;}
  .hero-cat2::before{display:none;}
  .hero-sub{font-size:16px;}
  .hero-actions .btn{width:100%;}
  .hero-strip{grid-template-columns:1fr;}
  .hero-strip .hs{border-right:0;border-bottom:1px solid var(--dark-line);padding:16px 20px;}
  .hero-strip .hs:last-child{border-bottom:0;}
  .scene-card{flex:0 0 84%;grid-template-columns:1fr;}
  .scene-fig{min-height:170px;order:1 !important;}
  .scene-body{order:2 !important;padding:18px;}
  .faq-grid{grid-template-columns:1fr;gap:12px;}
  .metric-row{grid-template-columns:1fr;}
  .metric{border-right:0;border-bottom:1px solid var(--border);padding:12px 0;}
  .metric:last-child{border-bottom:0;padding-bottom:0;}
  .steps{grid-template-columns:1fr;gap:20px;}
  .stat-bar{grid-template-columns:1fr;padding:8px 0;}
  .stat{padding:16px 20px;border-right:0;border-bottom:1px solid var(--border);}
  .stat:last-child{border-bottom:0;}
  .stat:nth-child(3),.stat:nth-child(4){border-top:0;padding-top:16px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .f-top{grid-template-columns:1fr;gap:0;}
  .f-col{border-bottom:1px solid var(--dark-line);padding:16px 0;}
  .f-col h4{margin-bottom:0;display:flex;align-items:center;justify-content:space-between;cursor:pointer;}
  .f-col h4 .f-toggle{
    display:inline-block;width:10px;height:10px;border-right:2px solid var(--text-3);
    border-bottom:2px solid var(--text-3);transform:rotate(45deg);transition:transform var(--t);
  }
  .f-col.open h4 .f-toggle{transform:rotate(-135deg);}
  .f-col ul,.f-col p{display:none;margin-top:12px;}
  .f-col.open ul,.f-col.open p{display:block;}
  .f-brand{margin-top:4px;}
  .f-legal{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:479px){
  h1{font-size:28px;}
  .hero-sub{font-size:15px;}
  .tag-row{flex-wrap:nowrap;overflow-x:auto;padding-bottom:6px;scrollbar-width:none;}
  .tag-row::-webkit-scrollbar{display:none;}
  .tag{flex:none;}
}

/* roulang page: category3 */
/* ============ 1. RESET ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,figure,blockquote,dl,dd,h1,h2,h3,h4,h5,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%;height:auto}
input,button,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
summary{list-style:none;cursor:pointer}
summary::-webkit-details-marker{display:none}

/* ============ 2. 变量 ============ */
:root{
  --ink:#0E1015;
  --ink-2:#171A22;
  --ink-line:#262A35;
  --bg:#F5F6F8;
  --card:#FFFFFF;
  --soft:#F0F2F5;
  --t1:#14161B;
  --t2:#5A6172;
  --t3:#8C93A3;
  --dk-text:#C9CEDA;
  --dk-title:#FFFFFF;
  --primary:#FF6A1A;
  --primary-d:#D8520A;
  --primary-l:#FFF3EA;
  --cyan:#17C3B2;
  --cyan-d:#0E8A7D;
  --cyan-l:#E6F8F6;
  --violet:#6C4CF1;
  --violet-l:#EFEBFF;
  --ok:#17C3B2;
  --warn:#FFB020;
  --err:#F04438;
  --border:#E6E9EF;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-badge:6px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(20,22,27,.05), 0 6px 18px rgba(20,22,27,.06);
  --sh-2:0 10px 28px rgba(20,22,27,.12);
  --t:.22s ease;
  --maxw:1200px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-num:"Inter","Segoe UI",system-ui,sans-serif;
}

/* ============ 3. 基础 ============ */
body{
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--t1);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
a{color:var(--primary);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--primary-d)}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(255,106,26,.22);border-radius:6px}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ============ 4. 顶部信息条 ============ */
.topbar{background:var(--ink);color:var(--dk-text);font-size:13px;line-height:36px}
.topbar-inner{display:flex;align-items:center;gap:12px;height:36px}
.topbar-site{color:#fff;font-weight:600;letter-spacing:.2px;font-family:var(--font-num)}
.topbar-sep{width:1px;height:14px;background:var(--ink-line);flex:none}
.topbar-note{color:var(--t3);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}
.topbar-links{display:flex;gap:18px;flex:none;margin-left:auto}
.topbar-links a{color:var(--dk-text);text-decoration:none;transition:color var(--t)}
.topbar-links a:hover{color:var(--primary)}

/* ============ 5. 主导航 ============ */
.navbar{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--border);
  transition:box-shadow var(--t);
}
.navbar.scrolled{box-shadow:0 6px 20px rgba(20,22,27,.08)}
.nav-inner{display:flex;align-items:center;gap:28px;height:68px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex:none}
.logo-mark{
  width:26px;height:26px;flex:none;background:var(--ink);
  clip-path:polygon(25% 0,75% 0,100% 50%,75% 100%,25% 100%,0 50%);
  display:grid;place-items:center;
}
.logo-mark i{
  width:9px;height:9px;background:var(--primary);display:block;
  clip-path:polygon(25% 0,75% 0,100% 50%,75% 100%,25% 100%,0 50%);
}
.logo-text{font-size:18px;font-weight:800;letter-spacing:-.3px;color:var(--t1)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-links a{
  position:relative;font-size:15px;font-weight:500;color:var(--t2);
  text-decoration:none;padding:0 14px;height:68px;display:flex;align-items:center;
  transition:color var(--t);
}
.nav-links a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-links a:hover{color:var(--primary)}
.nav-links a.active{color:var(--primary);font-weight:600}
.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{margin-left:auto;flex:none}
.burger{
  display:none;width:40px;height:40px;border-radius:8px;
  border:1px solid var(--border);flex-direction:column;justify-content:center;
  align-items:center;gap:4px;flex:none;
}
.burger span{width:18px;height:2px;background:var(--t1);border-radius:2px;transition:transform var(--t),opacity var(--t)}
.burger:hover{border-color:var(--primary)}
.burger:hover span{background:var(--primary)}

/* ============ 6. 移动抽屉 ============ */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:360px;background:#fff;
  z-index:90;transform:translateX(100%);transition:transform .26s ease;
  display:flex;flex-direction:column;box-shadow:-12px 0 40px rgba(14,16,21,.18);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:58px;padding:0 18px;border-bottom:1px solid var(--border)}
.drawer-close{width:36px;height:36px;border-radius:8px;border:1px solid var(--border);font-size:18px;color:var(--t2)}
.drawer-close:hover{color:var(--primary);border-color:var(--primary)}
.drawer-links{flex:1;overflow-y:auto;padding:6px 0}
.drawer-links a{
  display:flex;align-items:center;height:52px;padding:0 20px;font-size:15px;color:var(--t1);
  text-decoration:none;border-bottom:1px solid var(--border);
}
.drawer-links a.active{color:var(--primary);font-weight:600;background:var(--primary-l)}
.drawer-foot{padding:16px 18px 22px;border-top:1px solid var(--border)}
.drawer-foot .btn{width:100%}
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,16,21,.5);z-index:80;
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);
}
.drawer-mask.show{opacity:1;visibility:visible}

/* ============ 7. 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;text-decoration:none;white-space:nowrap;
  border:0;cursor:pointer;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
}
.btn-primary{
  background:var(--primary);color:#fff;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
}
.btn-primary:hover{background:var(--primary-d);color:#fff;clip-path:polygon(0 0,calc(100% - 13px) 0,100% 13px,100% 100%,0 100%)}
.btn-primary:focus-visible{box-shadow:inset 0 0 0 2px rgba(255,255,255,.85)}
.btn-primary:active{background:#C24708}
.btn-ghost{background:transparent;border:1.5px solid var(--primary);color:var(--primary)}
.btn-ghost:hover{background:var(--primary-l);color:var(--primary-d);border-color:var(--primary-d)}
.btn-dark-ghost{background:transparent;border:1.5px solid rgba(255,255,255,.3);color:#fff}
.btn-dark-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.55);color:#fff}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-text{color:var(--primary);font-weight:600;text-decoration:none;display:inline-flex;align-items:center;gap:6px}
.btn-text::after{content:"→";transition:transform var(--t)}
.btn-text:hover{color:var(--primary-d)}
.btn-text:hover::after{transform:translateX(3px)}
.btn:disabled,.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}

/* ============ 8. 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  font-size:12px;line-height:1;border-radius:var(--r-badge);
  background:var(--cyan-l);color:var(--cyan-d);font-weight:600;
}
.badge-violet{background:var(--violet-l);color:var(--violet)}
.badge-warn{background:#FFF6E5;color:#9A6200}
.badge-err{background:#FEF3F2;color:#B42318}
.badge-pill{border-radius:999px}

/* ============ 9. 面包屑 & 极简 Hero ============ */
.crumbs{font-size:13px;color:var(--t3);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.crumbs a{color:var(--t2);text-decoration:none}
.crumbs a:hover{color:var(--primary)}
.crumbs span{color:var(--t3)}
.hero-page{background:#fff;border-bottom:1px solid var(--border);padding:44px 0 54px}
.hero-page h1{
  font-size:44px;font-weight:800;line-height:1.18;letter-spacing:-.4px;margin:16px 0 14px;
}
.hero-page h1 em{font-style:normal;color:var(--primary)}
.hero-sub{font-size:18px;color:var(--t2);max-width:780px;margin-bottom:26px}
.search-panel{
  display:flex;align-items:center;gap:10px;background:var(--bg);
  border:1px solid var(--border);border-radius:var(--r-input);
  padding:8px 8px 8px 16px;max-width:720px;transition:border-color var(--t),box-shadow var(--t);
}
.search-panel:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(255,106,26,.22)}
.search-ico{
  width:14px;height:14px;border:2px solid var(--t3);border-radius:50%;position:relative;flex:none;
}
.search-ico::after{content:"";position:absolute;width:7px;height:2px;background:var(--t3);right:-6px;bottom:-2px;transform:rotate(45deg);border-radius:2px}
.search-panel input{flex:1;height:44px;border:0;background:transparent;font-size:15px;min-width:0}
.search-panel input::placeholder{color:var(--t3)}
.search-panel input:focus{outline:none}
.chips{display:flex;gap:10px;margin-top:22px;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{
  flex:none;height:34px;padding:0 16px;border-radius:999px;font-size:14px;
  border:1px solid var(--border);background:#fff;color:var(--t2);
  transition:background var(--t),color var(--t),border-color var(--t);
}
.chip:hover{border-color:var(--primary);color:var(--primary)}
.chip.active{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}

/* ============ 10. 数据指标条 ============ */
.metrics{background:#fff;border-bottom:1px solid var(--border)}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);padding:34px 0}
.metric{padding:0 26px;border-left:1px solid var(--border)}
.metric:first-child{border-left:0;padding-left:0}
.metric-num{font-size:32px;font-weight:800;line-height:1.1;color:var(--primary);letter-spacing:-.5px}
.metric:nth-child(2) .metric-num,.metric:nth-child(4) .metric-num{color:var(--cyan-d)}
.metric-label{font-size:13px;color:var(--t3);margin-top:8px}

/* ============ 11. 区块标题 ============ */
.sec-head{display:flex;align-items:flex-end;gap:18px;margin-bottom:32px}
.sec-head h2{
  font-size:32px;font-weight:700;line-height:1.3;position:relative;padding-left:16px;letter-spacing:-.3px;
}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--primary);
}
.sec-sub{font-size:15px;color:var(--t3);margin-top:10px;max-width:780px}
.sec-more{margin-left:auto;font-size:14px;font-weight:600;color:var(--primary);text-decoration:none;white-space:nowrap;padding-bottom:4px}
.sec-more:hover{color:var(--primary-d)}

/* ============ 12. 支持主题布局 ============ */
.support-layout{display:grid;grid-template-columns:264px minmax(0,1fr);gap:36px;align-items:start}
.side-nav{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:20px 16px;box-shadow:var(--sh-1);position:sticky;top:96px;
}
.side-title{font-size:13px;font-weight:700;color:var(--t3);letter-spacing:.6px;padding:0 10px 12px;border-bottom:1px solid var(--border);margin-bottom:10px}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:10px 12px;border-radius:8px;font-size:14px;color:var(--t2);
  text-decoration:none;transition:background var(--t),color var(--t);
}
.side-links a:hover{background:var(--bg);color:var(--primary)}
.side-links a.active{background:var(--primary-l);color:var(--primary);font-weight:600;position:relative}
.side-links a.active::before{content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:0 2px 2px 0;background:var(--primary)}
.side-links .count{font-size:12px;color:var(--t3);font-family:var(--font-num)}

.topics{display:grid;gap:12px}
.topic{
  position:relative;background:#fff;border:1px solid var(--border);border-radius:12px;
  padding:20px 24px 20px 28px;box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t),background var(--t);
}
.topic::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:4px;
  border-radius:0 2px 2px 0;background:var(--border);transition:background var(--t);
}
.topic:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#DCE1EA}
.topic:hover::before{background:var(--primary)}
.topic-title{
  font-size:18px;font-weight:600;line-height:1.45;color:var(--t1);
  text-decoration:none;display:block;margin-bottom:8px;
}
.topic-title:hover{color:var(--primary)}
.topic-desc{font-size:15px;color:var(--t2);line-height:1.8;margin-bottom:14px}
.topic-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.meta-time{font-size:13px;color:var(--t3)}

/* ============ 13. 支持渠道 ============ */
.channel-grid{display:grid;grid-template-columns:5fr 6fr;gap:48px;align-items:center}
.channel-media{position:relative;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--border)}
.channel-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.channel-media::after{
  content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(14,16,21,0) 40%,rgba(14,16,21,.45) 100%);
}
.channel-tag{
  position:absolute;left:16px;bottom:16px;z-index:2;background:rgba(255,255,255,.94);
  border-radius:999px;padding:0 14px;height:30px;display:inline-flex;align-items:center;
  font-size:13px;font-weight:600;color:var(--t1);
}
.channel-list{display:grid;gap:2px}
.channel-item{
  display:flex;gap:16px;padding:18px 4px;border-bottom:1px solid var(--border);
  transition:background var(--t);
}
.channel-item:first-child{border-top:1px solid var(--border)}
.channel-item:hover{background:var(--bg)}
.channel-ico{
  width:40px;height:40px;flex:none;border-radius:10px;background:var(--cyan-l);
  display:grid;place-items:center;color:var(--cyan-d);font-weight:800;font-size:15px;
  font-family:var(--font-num);
}
.channel-item:nth-child(2) .channel-ico{background:var(--primary-l);color:var(--primary-d)}
.channel-item:nth-child(3) .channel-ico{background:var(--violet-l);color:var(--violet)}
.channel-item:nth-child(4) .channel-ico{background:#FFF6E5;color:#9A6200}
.channel-body h3{font-size:16px;font-weight:600;margin-bottom:4px}
.channel-body p{font-size:14px;color:var(--t2);line-height:1.75;margin:0}
.channel-badge{margin-left:auto;flex:none;align-self:flex-start}

/* ============ 14. 暗区自查面板 ============ */
.selfcheck{background:var(--ink);color:var(--dk-text);padding:88px 0}
.selfcheck .sec-head h2{color:var(--dk-title)}
.selfcheck .sec-sub{color:var(--t3)}
.sc-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:28px}
.sc-card{
  background:var(--ink-2);border:1px solid var(--ink-line);border-radius:var(--r-card);
  padding:26px 24px;position:relative;overflow:hidden;
}
.sc-card::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--primary)}
.sc-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:26px;font-weight:800;color:var(--primary);letter-spacing:-.5px}
.sc-card h3{font-size:18px;font-weight:600;color:var(--dk-title);margin:12px 0 8px}
.sc-card p{font-size:14px;color:var(--dk-text);line-height:1.8;margin:0}
.alert-dark{
  background:rgba(240,68,56,.12);border-left:3px solid var(--err);
  border-radius:8px;padding:14px 18px;font-size:14px;color:#FFB4AE;
  display:flex;gap:12px;align-items:flex-start;
}

/* ============ 15. FAQ ============ */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;align-items:start}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:12px;overflow:hidden;
  transition:background var(--t),border-color var(--t),box-shadow var(--t);
}
.faq-item:hover{border-color:#DCE1EA}
.faq-item[open]{background:#FFF7F1;border-color:#FFD9BE;box-shadow:inset 4px 0 0 var(--primary)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;color:var(--t1);line-height:1.5;
}
.faq-q::after{
  content:"";width:9px;height:9px;flex:none;
  border-right:2px solid var(--t3);border-bottom:2px solid var(--t3);
  transform:rotate(45deg);margin-top:-4px;transition:transform var(--t),border-color var(--t);
}
.faq-item[open] .faq-q::after{transform:rotate(-135deg);margin-top:4px;border-color:var(--primary)}
.faq-a{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--t2)}

/* ============ 16. 帮助入口条 ============ */
.help-bar{padding:0 0 88px}
.help-inner{
  background:var(--soft);border:1px solid var(--border);border-radius:var(--r-card);
  padding:36px 40px;display:flex;align-items:center;gap:32px;flex-wrap:wrap;
}
.help-inner h2{font-size:24px;font-weight:700;line-height:1.35;margin-bottom:8px}
.help-inner p{font-size:15px;color:var(--t2);margin:0;max-width:620px}
.help-actions{margin-left:auto;display:flex;gap:12px;flex-wrap:wrap}

/* ============ 17. 返回顶部 ============ */
.backtop{
  position:fixed;right:24px;bottom:28px;z-index:70;
  height:44px;padding:0 18px;border-radius:999px;background:var(--ink);color:#fff;
  font-size:14px;font-weight:600;box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--t),visibility var(--t),transform var(--t),background var(--t);
}
.backtop.show{opacity:1;visibility:visible;transform:translateY(0)}
.backtop:hover{background:var(--primary)}

/* ============ 18. 页脚 ============ */
.footer{background:var(--ink);color:var(--dk-text);padding:72px 0 0;font-size:14px}
.f-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.f-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.f-brand .logo-mark{background:rgba(255,255,255,.08);box-shadow:inset 0 0 0 1px rgba(255,255,255,.18)}
.f-brand b{font-size:18px;color:#fff;font-weight:800;letter-spacing:-.2px}
.f-col p{color:var(--dk-text);font-size:14px;line-height:1.8;max-width:340px;margin:0}
.f-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.f-col ul{display:grid;gap:10px}
.f-col ul li{color:var(--dk-text);font-size:14px}
.f-col ul a{color:var(--dk-text);text-decoration:none;transition:color var(--t)}
.f-col ul a:hover{color:var(--primary)}
.f-legal{
  border-top:1px solid var(--ink-line);padding:22px 0 28px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--t3);
}

/* ============ 19. 响应式 ============ */
@media (max-width:1279px){
  .section{padding:72px 0}
  .hero-page h1{font-size:38px}
  .channel-grid{gap:36px}
}
@media (max-width:1023px){
  .nav-links a{padding:0 10px;font-size:14px}
  .hero-page h1{font-size:34px}
  .hero-sub{font-size:17px}
  .support-layout{grid-template-columns:minmax(0,1fr);gap:24px}
  .side-nav{
    position:static;padding:14px;box-shadow:none;
  }
  .side-title{border-bottom:0;padding-bottom:8px;margin-bottom:6px}
  .side-links{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding-bottom:4px}
  .side-links::-webkit-scrollbar{display:none}
  .side-links a{flex:none;border:1px solid var(--border);border-radius:999px;padding:8px 14px}
  .side-links a.active{background:var(--primary);color:#fff;border-color:var(--primary)}
  .side-links a.active::before{display:none}
  .side-links .count{display:none}
  .channel-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .sc-cards{grid-template-columns:repeat(2,1fr)}
  .faq-grid{grid-template-columns:minmax(0,1fr)}
  .help-inner{padding:30px 28px}
  .help-actions{margin-left:0}
  .f-top{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:48px 0}
  .topbar,.topbar-inner{height:32px;line-height:32px}
  .topbar-links{gap:12px}
  .hide-sm{display:none}
  .nav-inner{height:58px;gap:14px}
  .nav-links,.nav-cta{display:none}
  .burger{display:flex}
  .hero-page{padding:30px 0 40px}
  .hero-page h1{font-size:30px;margin:12px 0 12px}
  .hero-sub{font-size:16px;margin-bottom:22px}
  .search-panel{padding:6px 6px 6px 14px}
  .search-panel input{height:40px;font-size:14px}
  .search-panel .btn{height:40px;padding:0 14px}
  .metrics-grid{grid-template-columns:1fr 1fr;padding:26px 0;gap:24px 0}
  .metric{padding:0 18px}
  .metric:nth-child(3){border-left:0;padding-left:0}
  .metric-num{font-size:26px}
  .sec-head{flex-wrap:wrap;margin-bottom:24px}
  .sec-head h2{font-size:24px}
  .sec-more{margin-left:0}
  .topic{padding:18px 18px 18px 22px}
  .topic-title{font-size:17px}
  .sc-cards{grid-template-columns:minmax(0,1fr)}
  .selfcheck{padding:48px 0}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a{padding:0 18px 18px;font-size:15px}
  .help-bar{padding:0 0 48px}
  .help-inner{padding:24px 20px;gap:20px}
  .help-inner h2{font-size:20px}
  .help-actions{width:100%}
  .help-actions .btn{flex:1}
  .backtop{right:16px;bottom:18px;height:40px;padding:0 14px;font-size:13px}
  .footer{padding-top:48px}
  .f-top{grid-template-columns:minmax(0,1fr);gap:0;padding-bottom:24px}
  .f-col{border-bottom:1px solid var(--ink-line)}
  .f-col.open{border-bottom-color:var(--ink-line)}
  .f-col h4{display:flex;align-items:center;justify-content:space-between;padding:16px 0;margin:0;cursor:pointer}
  .f-col h4::after{
    content:"";width:8px;height:8px;border-right:2px solid var(--t3);border-bottom:2px solid var(--t3);
    transform:rotate(45deg);transition:transform var(--t);
  }
  .f-col.open h4::after{transform:rotate(-135deg)}
  .f-col ul,.f-col p{display:none;padding-bottom:16px}
  .f-col.open ul,.f-col.open p{display:grid}
  .f-brand{margin:18px 0 12px}
  .f-legal{flex-direction:column;gap:8px;padding:18px 0 24px}
}
@media (max-width:479px){
  .hero-page h1{font-size:28px}
  .metric{padding:0 14px}
  .metric-label{font-size:12px}
  .topbar-note{display:none}
  .topbar-sep{display:none}
  .chips{gap:8px}
  .chip{height:32px;padding:0 13px;font-size:13px}
}