/* roulang page: index */
*,*::before,*::after{box-sizing:border-box}
:root{
  --c-void:#05080F;
  --c-deep:#0A1120;
  --c-panel:rgba(19,30,52,.55);
  --c-line:rgba(120,170,255,.14);
  --c-primary:#3D8BFF;
  --c-primary-dim:#1B5FD6;
  --c-accent:#2AE0C0;
  --c-warm:#F2B24C;
  --c-text:#E9EFFA;
  --c-text-2:#9FB0CB;
  --c-text-3:#6B7C99;
  --r-card:16px;
  --r-btn:10px;
  --r-pill:999px;
  --r-input:10px;
  --sh-card:inset 0 1px 0 rgba(255,255,255,.04), 0 18px 40px -20px rgba(0,0,0,.85);
  --sh-glow:0 0 0 1px rgba(42,224,192,.35), 0 10px 34px rgba(42,224,192,.20);
  --blur:14px;
  --dur:.22s;
  --ease:cubic-bezier(.4,0,.2,1);
  --container:1200px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-void);
  color:var(--c-text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
svg{display:block}
::selection{background:rgba(42,224,192,.28);color:#fff}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.section{padding:clamp(56px,7.4vw,118px) 0}
.section-alt{background:var(--c-deep)}
.grid-bg{
  background-image:
    linear-gradient(rgba(120,170,255,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,170,255,.055) 1px,transparent 1px);
  background-size:64px 64px;
}

/* ============ 状态与通用组件 ============ */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;color:var(--c-accent);
  text-transform:uppercase;font-weight:500;margin-bottom:16px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--c-accent);border-radius:2px}
.section-title{font-size:clamp(22px,2.4vw,34px);max-width:760px}
.section-desc{color:var(--c-text-2);font-size:15px;max-width:660px;margin-top:14px}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:40px;flex-wrap:wrap}
.section-head .mini-link{font-size:14px;color:var(--c-text-2);display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.section-head .mini-link:hover{color:var(--c-accent)}
.section-head .mini-link svg{transition:transform var(--dur) var(--ease)}
.section-head .mini-link:hover svg{transform:translateX(3px)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;padding:0 22px;height:46px;border:1px solid transparent;cursor:pointer;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);}
.btn-primary{background:linear-gradient(100deg,var(--c-primary),var(--c-accent));color:#05121A;box-shadow:0 6px 22px rgba(42,224,192,.18)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--sh-glow)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px rgba(42,224,192,.16)}
.btn-primary:disabled{background:rgba(120,170,255,.18);color:var(--c-text-3);box-shadow:none;cursor:not-allowed;transform:none}
.btn-ghost{background:transparent;border:1px solid var(--c-line);color:var(--c-text)}
.btn-ghost:hover{border-color:var(--c-primary);background:rgba(61,139,255,.10);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:38px;font-size:14px;padding:0 18px}
.btn-block{width:100%}

.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;line-height:1.6;color:var(--c-accent);
  background:rgba(42,224,192,.12);border-radius:var(--r-pill);padding:3px 12px;font-weight:500;white-space:nowrap}
.pill-warm{color:var(--c-warm);background:rgba(242,178,76,.14)}
.pill-muted{color:var(--c-text-2);background:rgba(120,170,255,.10)}
.tag{font-size:12px;color:var(--c-text-2);border:1px solid var(--c-line);border-radius:var(--r-pill);padding:2px 10px}

.card{background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card);
  -webkit-backdrop-filter:blur(var(--blur));backdrop-filter:blur(var(--blur));}
.card-flat{background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card)}
.divider{height:1px;background:var(--c-line);border:0;margin:0}

.icon-box{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(61,139,255,.12);border:1px solid var(--c-line);color:var(--c-accent);flex:none}

/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:60;background:transparent;border-bottom:1px solid transparent;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),backdrop-filter var(--dur) var(--ease)}
.site-header.scrolled{background:rgba(5,8,15,.78);border-bottom:1px solid var(--c-line);
  -webkit-backdrop-filter:blur(var(--blur));backdrop-filter:blur(var(--blur))}
.nav-wrap{height:64px;display:flex;align-items:center;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.logo:hover{color:var(--c-text)}
.logo-mark{width:30px;height:30px;flex:none}
.nav-list{display:flex;align-items:center;gap:6px;margin-left:12px}
.nav-list a{font-size:14px;color:var(--c-text-2);padding:8px 12px;border-radius:8px;position:relative;transition:color var(--dur) var(--ease),background var(--dur) var(--ease)}
.nav-list a:hover{color:var(--c-text);background:rgba(61,139,255,.08)}
.nav-list a.active{color:var(--c-text);background:rgba(42,224,192,.10)}
.nav-list a.active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--c-accent)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-box{display:flex;align-items:center;gap:8px;width:250px;height:40px;padding:0 12px;
  background:rgba(19,30,52,.60);border:1px solid var(--c-line);border-radius:var(--r-input);
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
.search-box:hover{border-color:rgba(120,170,255,.3)}
.search-box:focus-within{border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(42,224,192,.16)}
.search-box input{flex:1;min-width:0;background:transparent;border:0;outline:0;color:var(--c-text);font-size:14px;height:100%}
.search-box input::placeholder{color:var(--c-text-3)}
.search-box svg{color:var(--c-text-3);flex:none}
.kbd{font-size:11px;color:var(--c-text-3);border:1px solid var(--c-line);border-radius:6px;padding:1px 6px;line-height:1.6;white-space:nowrap}
.nav-quick{font-size:14px;color:var(--c-text-2);white-space:nowrap}
.nav-quick:hover{color:var(--c-accent)}
.burger{display:none;width:42px;height:42px;border-radius:10px;background:transparent;border:1px solid var(--c-line);
  cursor:pointer;align-items:center;justify-content:center;color:var(--c-text)}
.burger:hover{border-color:var(--c-primary);color:var(--c-accent)}
.mobile-menu{position:fixed;inset:0;z-index:80;background:rgba(5,8,15,.94);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  display:none;flex-direction:column;padding:20px 18px 32px;overflow-y:auto}
.mobile-menu.open{display:flex}
.mobile-top{display:flex;align-items:center;justify-content:space-between;height:56px}
.mobile-menu .search-box{width:100%;margin:16px 0 8px}
.mobile-nav{display:flex;flex-direction:column;margin-top:8px}
.mobile-nav a{padding:15px 4px;font-size:16px;color:var(--c-text-2);border-bottom:1px solid var(--c-line)}
.mobile-nav a:hover,.mobile-nav a.active{color:var(--c-accent)}
.mobile-menu .btn{margin-top:24px}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:clamp(48px,6vw,86px) 0 clamp(56px,6vw,96px)}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(760px 420px at 78% 12%,rgba(42,224,192,.10),transparent 62%),
  radial-gradient(620px 380px at 8% 72%,rgba(61,139,255,.12),transparent 66%);pointer-events:none}
.hero-inner{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(28px,3.6vw,52px);font-weight:700;max-width:640px}
.hero-sub{margin-top:20px;color:var(--c-text-2);font-size:16px;max-width:560px}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.stat-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:44px;padding:18px;border-radius:var(--r-card);
  background:var(--c-panel);border:1px solid var(--c-line);box-shadow:var(--sh-card);
  -webkit-backdrop-filter:blur(var(--blur));backdrop-filter:blur(var(--blur))}
.stat b{display:block;font-size:clamp(18px,2vw,24px);font-weight:700;font-variant-numeric:tabular-nums;color:var(--c-text)}
.stat b em{font-style:normal;color:var(--c-accent);font-size:.7em;margin-left:2px}
.stat span{font-size:12px;color:var(--c-text-3);line-height:1.6;display:block;margin-top:2px}
.hero-visual{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line);box-shadow:var(--sh-card);min-height:360px}
.hero-visual img{width:100%;height:100%;object-fit:cover;aspect-ratio:5/6}
.hero-visual::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.30) 0%,rgba(5,8,15,.78) 100%),
  repeating-linear-gradient(0deg,rgba(120,170,255,.06) 0 1px,transparent 1px 46px),
  repeating-linear-gradient(90deg,rgba(120,170,255,.06) 0 1px,transparent 1px 46px)}
.hero-badge{position:absolute;left:18px;bottom:18px;z-index:2;display:flex;align-items:center;gap:10px;
  padding:12px 16px;border-radius:12px;background:rgba(10,17,32,.72);border:1px solid var(--c-line);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);font-size:13px;color:var(--c-text-2)}
.dot-live{width:8px;height:8px;border-radius:50%;background:var(--c-accent);box-shadow:0 0 0 4px rgba(42,224,192,.18);flex:none}

/* ============ Bento 价值主张 ============ */
.bento{display:grid;grid-template-columns:2fr 1fr;gap:20px}
.bento-main{border-radius:var(--r-card);border:1px solid var(--c-line);background:var(--c-panel);box-shadow:var(--sh-card);
  overflow:hidden;display:flex;flex-direction:column;-webkit-backdrop-filter:blur(var(--blur));backdrop-filter:blur(var(--blur))}
.bento-main img{width:100%;aspect-ratio:16/9;object-fit:cover;border-bottom:1px solid var(--c-line)}
.bento-body{padding:26px 28px 30px}
.bento-body h3{font-size:20px;margin-bottom:12px}
.bento-body p{color:var(--c-text-2);font-size:14.5px}
.check-list{margin-top:18px;display:grid;gap:10px}
.check-list li{display:flex;gap:10px;font-size:14px;color:var(--c-text-2)}
.check-list li span{color:var(--c-accent);font-weight:700;flex:none}
.bento-side{display:grid;gap:20px;grid-auto-rows:1fr}
.bento-card{border-radius:var(--r-card);border:1px solid var(--c-line);background:var(--c-panel);box-shadow:var(--sh-card);
  padding:24px;-webkit-backdrop-filter:blur(var(--blur));backdrop-filter:blur(var(--blur));
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease)}
.bento-card:hover{border-color:var(--c-primary);transform:translateY(-2px)}
.bento-card h3{font-size:17px;margin:16px 0 8px}
.bento-card p{font-size:14px;color:var(--c-text-2)}

/* ============ 功能分组 ============ */
.func-wrap{display:grid;grid-template-columns:240px 1fr;gap:32px;align-items:start}
.func-tabs{display:flex;flex-direction:column;gap:6px;position:sticky;top:88px}
.func-tab{display:block;padding:14px 16px;border-radius:12px;font-size:14.5px;color:var(--c-text-2);
  border:1px solid transparent;transition:all var(--dur) var(--ease)}
.func-tab:hover{color:var(--c-text);background:rgba(61,139,255,.08)}
.func-tab.active{color:var(--c-text);background:rgba(19,30,52,.7);border-color:var(--c-line);box-shadow:inset 2px 0 0 var(--c-accent)}
.func-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.func-card{border-radius:var(--r-card);border:1px solid var(--c-line);background:var(--c-panel);padding:26px;
  box-shadow:var(--sh-card);transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease)}
.func-card:hover{border-color:var(--c-primary);transform:translateY(-2px)}
.func-card h3{font-size:17px;margin:16px 0 8px}
.func-card p{font-size:14px;color:var(--c-text-2)}
.func-card .divider{margin:18px 0 14px}
.func-meta{font-size:13px;color:var(--c-text-3);display:flex;align-items:center;gap:8px}

/* ============ 流程步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;margin-top:12px}
.steps::before{content:"";position:absolute;top:19px;left:6%;right:6%;height:1px;
  background:linear-gradient(90deg,rgba(42,224,192,.5),rgba(61,139,255,.35),rgba(120,170,255,.10))}
.step{position:relative;padding-top:56px}
.step-num{position:absolute;top:0;left:0;width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:#05121A;background:linear-gradient(120deg,var(--c-primary),var(--c-accent));
  box-shadow:0 0 0 6px rgba(42,224,192,.10),0 8px 22px rgba(42,224,192,.22)}
.step h3{font-size:16px;margin-bottom:8px}
.step p{font-size:14px;color:var(--c-text-2)}

/* ============ 案例 ============ */
.case-row{display:grid;grid-template-columns:1.2fr .8fr;gap:36px;align-items:center;padding:34px 0;border-top:1px solid var(--c-line)}
.case-row:last-child{border-bottom:1px solid var(--c-line)}
.case-row.rev .case-text{order:2}
.case-row.rev .case-side{order:1}
.case-text h3{font-size:19px;margin:14px 0 12px}
.case-quote{font-size:15px;color:var(--c-text-2);padding-left:16px;border-left:2px solid var(--c-primary)}
.case-side{display:flex;flex-direction:column;gap:16px}
.case-metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.metric{border-radius:12px;border:1px solid var(--c-line);background:var(--c-panel);padding:16px}
.metric b{display:block;font-size:22px;font-weight:700;color:var(--c-accent);font-variant-numeric:tabular-nums}
.metric span{font-size:12.5px;color:var(--c-text-3)}
.logo-ph{height:64px;border:1px dashed rgba(120,170,255,.28);border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:13px;color:var(--c-text-3);background:rgba(19,30,52,.30)}

/* ============ 价格 ============ */
.seg{display:inline-flex;padding:4px;border-radius:var(--r-pill);border:1px solid var(--c-line);background:rgba(19,30,52,.55);gap:4px}
.seg span{padding:7px 20px;border-radius:var(--r-pill);font-size:13.5px;color:var(--c-text-2);cursor:default}
.seg span.on{background:linear-gradient(100deg,var(--c-primary),var(--c-accent));color:#05121A;font-weight:600}
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch;margin-top:36px}
.plan{position:relative;display:flex;flex-direction:column;border-radius:var(--r-card);border:1px solid var(--c-line);
  background:var(--c-panel);padding:30px 26px;box-shadow:var(--sh-card);
  -webkit-backdrop-filter:blur(var(--blur));backdrop-filter:blur(var(--blur));transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.plan:hover{transform:translateY(-3px);border-color:var(--c-primary)}
.plan.featured{border-color:var(--c-accent);box-shadow:var(--sh-glow)}
.plan-badge{position:absolute;top:-12px;left:26px}
.plan h3{font-size:18px}
.plan .plan-for{font-size:13.5px;color:var(--c-text-2);margin-top:8px;min-height:44px}
.plan-price{margin:18px 0 6px;font-size:38px;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.plan-price small{font-size:14px;font-weight:400;color:var(--c-text-3);margin-left:6px}
.plan-list{margin:18px 0 26px;display:grid;gap:10px;flex:1}
.plan-list li{display:flex;gap:10px;font-size:14px;color:var(--c-text-2)}
.plan-list li i{color:var(--c-accent);font-style:normal;font-weight:700;flex:none}

/* ============ 资讯列表 ============ */
.news-wrap{display:grid;grid-template-columns:1.25fr 1fr;gap:24px;align-items:start}
.news-lead{display:block;overflow:hidden;transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease)}
.news-lead:hover{border-color:var(--c-primary);transform:translateY(-3px)}
.news-lead img{width:100%;aspect-ratio:16/10;object-fit:cover;border-bottom:1px solid var(--c-line)}
.news-lead-body{padding:24px 26px 28px}
.news-lead-body h3{font-size:20px;margin:14px 0 10px}
.news-lead-body p{font-size:14px;color:var(--c-text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{font-size:12.5px;color:var(--c-text-3);margin-top:16px;display:flex;align-items:center;gap:8px}
.news-list{display:flex;flex-direction:column;border-radius:var(--r-card);border:1px solid var(--c-line);background:var(--c-panel);overflow:hidden}
.news-row{display:flex;align-items:center;gap:14px;padding:18px 22px;border-bottom:1px solid var(--c-line);min-height:76px;
  transition:background var(--dur) var(--ease)}
.news-row:last-child{border-bottom:0}
.news-row:hover{background:rgba(61,139,255,.06)}
.news-row:hover .arrow{transform:translateX(3px);color:var(--c-accent)}
.news-row-title{flex:1;font-size:15px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-row .time{font-size:12.5px;color:var(--c-text-3);white-space:nowrap}
.arrow{color:var(--c-text-3);transition:transform var(--dur) var(--ease),color var(--dur) var(--ease);flex:none}
.is-empty{padding:44px 24px;text-align:center;border-radius:var(--r-card);border:1px dashed rgba(120,170,255,.26);
  background:rgba(19,30,52,.4);color:var(--c-text-2)}
.is-empty svg{margin:0 auto 14px;color:var(--c-text-3)}
.is-empty p{font-size:14px;margin-bottom:18px}

/* ============ FAQ ============ */
.faq{max-width:880px;margin:0 auto;display:grid;gap:14px}
.faq-item{border-radius:var(--r-card);border:1px solid var(--c-line);background:var(--c-panel);overflow:hidden;
  -webkit-backdrop-filter:blur(var(--blur));backdrop-filter:blur(var(--blur));box-shadow:var(--sh-card);position:relative}
.faq-item::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--c-accent);opacity:0;transition:opacity var(--dur) var(--ease)}
.faq-item.open::before{opacity:1}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 24px;
  background:transparent;border:0;cursor:pointer;color:var(--c-text);font-size:16px;font-weight:600;text-align:left;line-height:1.6}
.faq-q:hover{color:var(--c-accent)}
.faq-ic{flex:none;width:22px;height:22px;position:relative;transition:transform var(--dur) var(--ease);color:var(--c-accent)}
.faq-item.open .faq-ic{transform:rotate(45deg)}
.faq-ic::before,.faq-ic::after{content:"";position:absolute;background:currentColor;border-radius:2px}
.faq-ic::before{left:10px;top:3px;width:2px;height:16px}
.faq-ic::after{left:3px;top:10px;width:16px;height:2px}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--dur) var(--ease)}
.faq-a-inner{padding:0 24px 22px;color:var(--c-text-2);font-size:15px;line-height:1.9}

/* ============ CTA 带 ============ */
.cta-band{border-radius:var(--r-card);border:1px solid var(--c-line);background:var(--c-panel);
  box-shadow:var(--sh-card);-webkit-backdrop-filter:blur(var(--blur));backdrop-filter:blur(var(--blur));
  padding:clamp(28px,4vw,48px);display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  position:relative;overflow:hidden}
.cta-band::after{content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(42,224,192,.16),transparent 66%);pointer-events:none}
.cta-band h2{font-size:clamp(20px,2.2vw,28px);max-width:560px}
.cta-band .cta-note{font-size:12px;color:var(--c-text-3);margin-top:12px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{position:relative;background:var(--c-deep);border-top:1px solid var(--c-line);margin-top:0}
.foot-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding:64px 0 40px}
.foot-brand p{font-size:14px;color:var(--c-text-2);margin-top:16px;max-width:320px}
.foot-col h4{font-size:14px;color:var(--c-text);margin-bottom:16px;font-weight:600}
.foot-col a{display:block;font-size:14px;color:var(--c-text-2);padding:6px 0}
.foot-col a:hover{color:var(--c-accent)}
.foot-mid{border-top:1px solid var(--c-line);padding:20px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:var(--c-text-3)}
.foot-bottom{height:72px;
  background-image:
    linear-gradient(rgba(120,170,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,170,255,.05) 1px,transparent 1px);
  background-size:56px 56px;opacity:.55;border-top:1px solid var(--c-line)}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{padding:0 28px}
  .hero-inner{gap:36px}
  .nav-list a{padding:8px 10px;font-size:13.5px}
  .search-box{width:200px}
  .func-wrap{grid-template-columns:210px 1fr}
}
@media (max-width:1023px){
  .search-box,.nav-quick{display:none}
  .burger{display:flex}
  .nav-list{display:none}
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero-visual{min-height:280px}
  .hero-visual img{aspect-ratio:16/9}
  .bento{grid-template-columns:1fr}
  .bento-side{grid-template-columns:repeat(2,1fr);grid-auto-rows:auto}
  .func-wrap{grid-template-columns:1fr;gap:22px}
  .func-tabs{position:static;flex-direction:row;overflow-x:auto;gap:8px;padding-bottom:4px}
  .func-tab{white-space:nowrap;border:1px solid var(--c-line);background:rgba(19,30,52,.5)}
  .func-tab.active{box-shadow:none;border-color:var(--c-accent)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .steps::before{display:none}
  .plans{grid-template-columns:1fr}
  .plan.featured{order:-1}
  .news-wrap{grid-template-columns:1fr}
  .foot-top{grid-template-columns:1fr 1fr;gap:28px;padding-top:48px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  .hero{padding-top:36px}
  .hero h1{font-size:30px}
  .stat-bar{grid-template-columns:repeat(2,1fr);gap:12px;padding:16px}
  .stat:nth-child(n+3){display:none}
  .func-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:26px}
  .step{padding-top:0;padding-left:54px}
  .step-num{left:0;top:2px}
  .case-row,.case-row.rev{grid-template-columns:1fr;gap:20px;padding:26px 0}
  .case-row.rev .case-text,.case-row.rev .case-side{order:0}
  .cta-band{flex-direction:column;align-items:flex-start}
  .faq-q{font-size:15px;padding:18px}
  .faq-a-inner{padding:0 18px 20px}
  .news-row{flex-wrap:wrap;gap:8px}
  .news-row .time{width:100%}
}
@media (max-width:480px){
  .hero-badge{display:none}
  .stat-bar{grid-template-columns:1fr 1fr}
  .foot-top{grid-template-columns:1fr}
  .foot-bottom{height:52px;background-image:none}
}

/* roulang page: article */
:root{
  --c-void:#05080F;
  --c-deep:#0A1120;
  --c-panel:rgba(19,30,52,.55);
  --c-panel-solid:rgba(15,24,42,.78);
  --c-line:rgba(120,170,255,.14);
  --c-primary:#3D8BFF;
  --c-primary-dim:#1B5FD6;
  --c-accent:#2AE0C0;
  --c-warm:#F2B24C;
  --c-text:#E9EFFA;
  --c-text-2:#9FB0CB;
  --c-text-3:#6B7C99;
  --c-text-body:#C9D5E8;
  --r-card:16px;
  --r-inner:12px;
  --r-btn:10px;
  --r-pill:999px;
  --r-input:10px;
  --sh-card:inset 0 1px 0 rgba(255,255,255,.04), 0 18px 40px -20px rgba(0,0,0,.85);
  --sh-glow:0 0 0 1px rgba(42,224,192,.35), 0 10px 34px rgba(42,224,192,.20);
  --blur:14px;
  --dur:.22s;
  --ease:cubic-bezier(.4,0,.2,1);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Inter,sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-void);
  color:var(--c-text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:6px;}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.3;letter-spacing:-.01em;color:var(--c-text);}
p{margin:0;}
ul,ol{margin:0;padding:0;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
input{font-family:inherit;}
::selection{background:rgba(42,224,192,.28);color:#fff;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,8,15,.72);
  border-bottom:1px solid transparent;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),backdrop-filter var(--dur) var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,10,20,.82);
  backdrop-filter:blur(var(--blur));
  -webkit-backdrop-filter:blur(var(--blur));
  border-bottom-color:var(--c-line);
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:64px;}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:16px;font-weight:600;color:var(--c-text);white-space:nowrap;}
.logo-mark{width:28px;height:28px;flex:0 0 28px;}
.logo:hover{color:var(--c-accent);}
.nav-list{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-list a{
  position:relative;display:inline-block;padding:8px 12px;border-radius:8px;
  font-size:14.5px;color:var(--c-text-2);font-weight:500;
}
.nav-list a:hover{color:var(--c-text);background:rgba(61,139,255,.08);}
.nav-list a.active{color:var(--c-text);}
.nav-list a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--c-accent);border-radius:2px;box-shadow:0 0 12px rgba(42,224,192,.7);
}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search-box{
  display:flex;align-items:center;gap:8px;
  width:250px;height:38px;padding:0 12px;
  background:rgba(19,30,52,.6);
  border:1px solid var(--c-line);
  border-radius:var(--r-input);
  color:var(--c-text-3);
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.search-box:focus-within{border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(42,224,192,.14);}
.search-box input{
  flex:1;min-width:0;background:none;border:none;outline:none;
  color:var(--c-text);font-size:13.5px;
}
.search-box input::placeholder{color:var(--c-text-3);}
.kbd{
  font-size:11px;line-height:1;padding:4px 6px;border-radius:6px;
  color:var(--c-text-3);border:1px solid var(--c-line);background:rgba(255,255,255,.03);
}
.nav-quick{font-size:14px;color:var(--c-text-2);font-weight:500;padding:8px 4px;}
.nav-quick:hover{color:var(--c-accent);}
.burger{display:none;width:40px;height:40px;border-radius:var(--r-btn);border:1px solid var(--c-line);align-items:center;justify-content:center;color:var(--c-text);}
.burger:hover{border-color:var(--c-primary);background:rgba(61,139,255,.10);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-primary{
  background:linear-gradient(100deg,var(--c-primary) 0%,var(--c-accent) 100%);
  color:#05121A;
  box-shadow:0 6px 20px -8px rgba(42,224,192,.55);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--sh-glow);}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px -8px rgba(42,224,192,.45);}
.btn-primary:disabled{filter:saturate(.4) brightness(.8);box-shadow:none;cursor:not-allowed;transform:none;}
.btn-ghost{
  background:transparent;border-color:var(--c-line);color:var(--c-text);
}
.btn-ghost:hover{border-color:var(--c-primary);background:rgba(61,139,255,.10);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);background:rgba(61,139,255,.06);}
.btn-ghost:disabled{filter:saturate(.4);cursor:not-allowed;transform:none;}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;
  padding:4px 11px;border-radius:var(--r-pill);
  font-size:12px;font-weight:500;line-height:1.6;
  color:var(--c-accent);background:rgba(42,224,192,.12);
  border:1px solid rgba(42,224,192,.22);
}
.tag-warm{color:var(--c-warm);background:rgba(242,178,76,.12);border-color:rgba(242,178,76,.28);}
.tag-muted{color:var(--c-text-2);background:rgba(120,170,255,.10);border-color:var(--c-line);}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:22px 0 0;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);flex-wrap:nowrap;overflow:hidden;}
.crumb a{color:var(--c-text-2);}
.crumb a:hover{color:var(--c-accent);}
.crumb .sep{color:var(--c-text-3);opacity:.7;}
.crumb .now{max-width:52ch;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--c-text-3);}

/* ---------- 文章头部 ---------- */
.article-head{
  position:relative;padding:36px 0 40px;
  border-bottom:1px solid var(--c-line);
  overflow:hidden;
}
.article-head::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:.20;filter:grayscale(.3);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 92%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 92%);
  pointer-events:none;
}
.article-head .container{position:relative;z-index:1;}
.article-eyebrow{display:flex;align-items:center;gap:10px;margin-bottom:16px;flex-wrap:wrap;}
.article-title{
  font-size:clamp(28px,3.4vw,44px);
  font-weight:700;
  max-width:900px;
  margin-bottom:18px;
  letter-spacing:-.015em;
}
.article-meta{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-size:13px;color:var(--c-text-3);
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--c-text-3);opacity:.7;}
.article-meta a{color:var(--c-text-2);}
.article-meta a:hover{color:var(--c-accent);}

/* ---------- 正文 ---------- */
.article-main{padding:56px 0 24px;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px;}
.article-body{max-width:760px;width:100%;margin:0 auto;}
.article-body :where(p,li,td,th,figcaption){font-size:17px;line-height:1.9;}
.article-body p{margin:0 0 20px;color:var(--c-text-body);}
.article-body h2{
  position:relative;
  font-size:clamp(22px,2.2vw,27px);
  margin:48px 0 18px;
  padding-left:16px;
  color:var(--c-text);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.42em;width:3px;height:18px;
  background:var(--c-accent);border-radius:2px;box-shadow:0 0 10px rgba(42,224,192,.55);
}
.article-body h3{font-size:20px;margin:34px 0 14px;color:var(--c-text);}
.article-body h4{font-size:17px;margin:26px 0 12px;color:var(--c-text-2);}
.article-body a{color:var(--c-primary);border-bottom:1px solid rgba(61,139,255,.35);}
.article-body a:hover{color:var(--c-accent);border-bottom-color:rgba(42,224,192,.55);}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:2px;list-style:none;}
.article-body ul li,.article-body ol li{position:relative;padding-left:22px;margin-bottom:10px;color:var(--c-text-body);}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;
  background:var(--c-accent);border-radius:2px;opacity:.85;
}
.article-body ol{counter-reset:li;}
.article-body ol li{counter-increment:li;}
.article-body ol li::before{
  content:counter(li);position:absolute;left:0;top:.15em;
  width:18px;height:18px;border-radius:50%;
  font-size:11px;line-height:18px;text-align:center;font-weight:600;
  color:#05121A;background:var(--c-accent);
}
.article-body blockquote{
  margin:24px 0;padding:20px 22px;
  border-left:2px solid var(--c-primary);
  border-radius:0 var(--r-inner) var(--r-inner) 0;
  background:var(--c-panel);
  color:var(--c-text-2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  border-radius:12px;border:1px solid var(--c-line);
  margin:24px auto;
}
.article-body figure{margin:26px 0;}
.article-body figcaption{text-align:center;font-size:13px;color:var(--c-text-3);margin-top:10px;}
.article-body .table-scroll{width:100%;overflow-x:auto;margin:24px 0;border:1px solid var(--c-line);border-radius:var(--r-inner);}
.article-body table{width:100%;border-collapse:collapse;min-width:520px;}
.article-body th{
  background:var(--c-deep);color:var(--c-text);
  font-size:14px;font-weight:600;text-align:left;
  padding:12px 16px;border-bottom:1px solid var(--c-line);
}
.article-body td{padding:12px 16px;border-bottom:1px solid rgba(120,170,255,.08);color:var(--c-text-body);font-size:15px;}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.03);}
.article-body pre{
  margin:24px 0;padding:18px 20px;overflow-x:auto;
  background:var(--c-deep);border:1px solid var(--c-line);border-radius:var(--r-inner);
  font-family:var(--mono);font-size:13.5px;line-height:1.75;color:var(--c-text-2);
}
.article-body code{
  font-family:var(--mono);font-size:.9em;
  background:rgba(120,170,255,.10);border:1px solid var(--c-line);
  padding:2px 6px;border-radius:6px;color:var(--c-accent);
}
.article-body pre code{background:none;border:none;padding:0;color:inherit;}
.article-body hr{border:none;border-top:1px solid var(--c-line);margin:36px 0;}
.article-body strong{color:var(--c-text);font-weight:600;}

/* 空态 */
.is-empty{
  display:flex;flex-direction:column;align-items:center;gap:16px;
  padding:56px 24px;text-align:center;
  background:var(--c-panel);border:1px dashed var(--c-line);border-radius:var(--r-card);
}
.is-empty svg{color:var(--c-text-3);}
.is-empty h3{font-size:19px;}
.is-empty p{font-size:14px;line-height:1.7;color:var(--c-text-2);max-width:420px;}

/* ---------- 返回入口 ---------- */
.back-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:44px;padding-top:28px;border-top:1px solid var(--c-line);}

/* ---------- 相关推荐 ---------- */
.related{padding:72px 0 8px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(22px,2.4vw,30px);}
.section-head p{font-size:14px;color:var(--c-text-2);margin-top:8px;}
.more-link{font-size:14px;color:var(--c-text-2);font-weight:500;display:inline-flex;align-items:center;gap:6px;}
.more-link:hover{color:var(--c-accent);}
.more-link svg{transition:transform var(--dur) var(--ease);}
.more-link:hover svg{transform:translateX(3px);}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.card{
  display:flex;flex-direction:column;
  background:var(--c-panel);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  overflow:hidden;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(61,139,255,.42);box-shadow:inset 0 1px 0 rgba(255,255,255,.06),0 24px 46px -24px rgba(0,0,0,.9);}
.card-cover{position:relative;aspect-ratio:16/10;overflow:hidden;background:rgba(19,30,52,.7);}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.card:hover .card-cover img{transform:scale(1.04);}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card-body h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-body p{font-size:14px;line-height:1.7;color:var(--c-text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;font-size:12.5px;color:var(--c-text-3);}

/* ---------- CTA 带 ---------- */
.cta-band{
  margin:88px 0 80px;
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  background:linear-gradient(120deg,rgba(19,30,52,.72),rgba(10,17,32,.72));
  backdrop-filter:blur(var(--blur));
  -webkit-backdrop-filter:blur(var(--blur));
  box-shadow:var(--sh-card);
  padding:34px 36px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-70px;width:280px;height:280px;
  background:radial-gradient(circle,rgba(42,224,192,.16),transparent 68%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(20px,2vw,26px);margin-bottom:8px;}
.cta-band .sub{font-size:12.5px;color:var(--c-text-3);margin-top:10px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1;}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:20px;background:var(--c-deep);border-top:1px solid var(--c-line);position:relative;overflow:hidden;}
.foot-top{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;
  padding:64px 0 40px;
}
.foot-brand .logo{margin-bottom:16px;}
.foot-brand p{font-size:14px;line-height:1.8;color:var(--c-text-2);max-width:340px;}
.foot-col h4{font-size:14px;color:var(--c-text);margin-bottom:16px;font-weight:600;}
.foot-col a{display:block;font-size:14px;color:var(--c-text-2);padding:6px 0;}
.foot-col a:hover{color:var(--c-accent);}
.foot-mid{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0 30px;border-top:1px solid var(--c-line);
  font-size:12.5px;color:var(--c-text-3);
}
.foot-bottom{
  height:96px;
  background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center bottom;
  opacity:.14;
  mask-image:linear-gradient(0deg,rgba(0,0,0,.9),transparent);
  -webkit-mask-image:linear-gradient(0deg,rgba(0,0,0,.9),transparent);
}

/* ---------- 移动菜单 ---------- */
.mobile-panel{
  display:none;position:fixed;inset:56px 0 0 0;z-index:55;
  background:rgba(5,8,15,.94);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  padding:22px;
  overflow-y:auto;
}
.mobile-panel.open{display:block;}
.mobile-panel .search-box{width:100%;height:44px;margin-bottom:18px;}
.mobile-panel a.m-link{
  display:block;padding:14px 12px;border-radius:var(--r-btn);
  font-size:16px;color:var(--c-text-2);border-bottom:1px solid rgba(120,170,255,.08);
}
.mobile-panel a.m-link:hover,.mobile-panel a.m-link.active{color:var(--c-text);background:rgba(61,139,255,.08);}
.mobile-panel .btn{width:100%;margin-top:20px;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 28px;}
  .search-box{width:210px;}
  .nav-list a{padding:8px 9px;font-size:14px;}
}
@media (max-width:1023px){
  .container{padding:0 24px;}
  .nav-list{display:none;}
  .nav-quick{display:none;}
  .search-box{display:none;}
  .burger{display:inline-flex;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .foot-top{grid-template-columns:1fr 1fr;gap:32px;}
  .article-main{padding:44px 0 16px;}
  .article-body p,.article-body li{font-size:16.5px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .nav-wrap{height:56px;}
  .logo{font-size:15px;}
  .article-head{padding:26px 0 28px;}
  .article-title{font-size:clamp(24px,6vw,30px);}
  .article-main{padding:34px 0 12px;}
  .article-body :where(p,li,td,th,figcaption){font-size:16px;line-height:1.85;}
  .article-body h2{font-size:22px;margin-top:38px;}
  .article-body h3{font-size:18.5px;}
  .related{padding:52px 0 6px;}
  .card-grid{grid-template-columns:1fr;}
  .cta-band{margin:60px 0 56px;padding:26px 22px;flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1;min-height:44px;}
  .back-row .btn{flex:1;min-height:44px;}
  .foot-top{grid-template-columns:1fr;gap:28px;padding:48px 0 32px;}
  .foot-mid{flex-direction:column;align-items:flex-start;}
}
@media (max-width:480px){
  .crumb{font-size:12px;}
  .crumb .now{max-width:26ch;}
  .foot-bottom{height:64px;}
  .article-meta{font-size:12.5px;}
}

/* roulang page: category1 */
:root{
  --c-void:#05080F;
  --c-deep:#0A1120;
  --c-panel:rgba(19,30,52,.55);
  --c-line:rgba(120,170,255,.14);
  --c-primary:#3D8BFF;
  --c-primary-dim:#1B5FD6;
  --c-accent:#2AE0C0;
  --c-warm:#F2B24C;
  --c-text:#E9EFFA;
  --c-text-2:#9FB0CB;
  --c-text-3:#6B7C99;
  --r-card:16px;
  --r-btn:10px;
  --r-pill:999px;
  --r-input:10px;
  --sh-card:inset 0 1px 0 rgba(255,255,255,.04),0 18px 40px -20px rgba(0,0,0,.85);
  --sh-glow:0 0 0 1px rgba(42,224,192,.35),0 10px 34px rgba(42,224,192,.20);
  --blur:14px;
  --dur:.22s;
  --ease:cubic-bezier(.4,0,.2,1);
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-void);
  color:var(--c-text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,Inter,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
input{font:inherit}
h1,h2,h3,h4{margin:0;font-weight:650;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
.container{max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:110px 0}
.section-alt{background:var(--c-deep)}
.sec-head{max-width:760px;margin-bottom:40px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--c-accent);letter-spacing:.06em;margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--c-accent);border-radius:2px}
h2.sec-title{font-size:clamp(22px,2.4vw,34px)}
.sec-desc{margin-top:14px;color:var(--c-text-2);font-size:15px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  height:64px;
  display:flex;align-items:center;
  background:rgba(5,8,15,.72);
  border-bottom:1px solid transparent;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),backdrop-filter var(--dur) var(--ease);
}
.site-header.scrolled{
  background:rgba(9,15,28,.82);
  border-bottom-color:var(--c-line);
  backdrop-filter:blur(var(--blur));
  -webkit-backdrop-filter:blur(var(--blur));
}
.nav-wrap{display:flex;align-items:center;gap:28px;width:100%}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:650;font-size:16px;white-space:nowrap}
.logo-mark{width:30px;height:30px;flex:none}
.logo span{background:linear-gradient(96deg,#E9EFFA,#9FB0CB);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-list{display:flex;align-items:center;gap:6px;margin-left:8px}
.nav-list a{
  position:relative;padding:8px 12px;border-radius:var(--r-pill);
  font-size:14.5px;color:var(--c-text-2);
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-list a:hover{color:var(--c-text);background:rgba(61,139,255,.08)}
.nav-list a.active{color:var(--c-text);background:rgba(42,224,192,.10)}
.nav-list a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--c-accent);border-radius:2px;
}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:8px;
  width:250px;height:38px;padding:0 12px;
  background:rgba(19,30,52,.6);
  border:1px solid var(--c-line);border-radius:var(--r-input);
  color:var(--c-text-3);
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.search-box:focus-within{border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(42,224,192,.16)}
.search-box input{
  flex:1;min-width:0;background:transparent;border:0;outline:none;
  color:var(--c-text);font-size:13.5px;
}
.search-box input::placeholder{color:var(--c-text-3)}
.kbd{
  font-size:11px;color:var(--c-text-3);
  border:1px solid var(--c-line);border-radius:6px;padding:1px 5px;
}
.nav-quick{font-size:14px;color:var(--c-text-2);transition:color var(--dur) var(--ease)}
.nav-quick:hover{color:var(--c-accent)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:9px}
.btn-primary{
  background:linear-gradient(100deg,var(--c-primary),var(--c-accent));
  color:#05121A;
  box-shadow:0 8px 26px rgba(42,224,192,.18);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--sh-glow)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px rgba(42,224,192,.16)}
.btn-primary:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
.btn-primary[disabled]{box-shadow:none;filter:saturate(.6);cursor:not-allowed}
.btn-ghost{background:transparent;border-color:var(--c-line);color:var(--c-text)}
.btn-ghost:hover{border-color:var(--c-primary);background:rgba(61,139,255,.10);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0);background:rgba(61,139,255,.16)}
.btn-ghost[disabled]{filter:saturate(.6);cursor:not-allowed}
.burger{
  display:none;width:40px;height:40px;align-items:center;justify-content:center;
  background:rgba(19,30,52,.6);border:1px solid var(--c-line);border-radius:10px;
  color:var(--c-text);cursor:pointer;transition:border-color var(--dur) var(--ease)}
.burger:hover{border-color:var(--c-primary)}
.burger:active{background:rgba(61,139,255,.14)}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  min-height:262px;
  display:flex;align-items:center;
  padding:56px 0;
  overflow:hidden;
  border-bottom:1px solid var(--c-line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  opacity:.55;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(720px 320px at 18% 12%,rgba(42,224,192,.10),transparent 70%),
    linear-gradient(180deg,rgba(5,8,15,.72),rgba(5,8,15,.94)),
    linear-gradient(rgba(120,170,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,170,255,.06) 1px,transparent 1px);
  background-size:auto,auto,58px 58px,58px 58px;
}
.page-hero .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--c-text-3);margin-bottom:16px}
.crumb a{color:var(--c-text-2);transition:color var(--dur) var(--ease)}
.crumb a:hover{color:var(--c-accent)}
.crumb span.sep{color:var(--c-text-3)}
.page-hero h1{max-width:820px;font-size:clamp(27px,3.4vw,46px)}
.hero-sub{max-width:680px;margin-top:16px;color:var(--c-text-2);font-size:16px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}

/* ---------- zigzag ---------- */
.zig{display:flex;flex-direction:column;gap:72px}
.zig-row{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.zig-row.rev .zig-media{order:2}
.zig-media{
  position:relative;border-radius:var(--r-card);
  border:1px solid var(--c-line);overflow:hidden;
  box-shadow:var(--sh-card);background:var(--c-panel);
}
.zig-media img{width:100%;height:320px;object-fit:cover}
.zig-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.10),rgba(5,8,15,.62));
}
.zig-tag{
  position:absolute;left:16px;top:16px;z-index:2;
  display:inline-flex;padding:5px 12px;border-radius:var(--r-pill);
  font-size:12px;color:var(--c-accent);background:rgba(42,224,192,.12);
  border:1px solid rgba(42,224,192,.26);
}
.zig-body h2{font-size:clamp(21px,2.2vw,30px);margin-bottom:16px}
.zig-body p{color:var(--c-text-2);font-size:15.5px;margin-bottom:14px}
.bullet-list{margin-top:20px;display:flex;flex-direction:column;gap:12px}
.bullet-list li{display:flex;gap:12px;font-size:15px;color:var(--c-text)}
.bullet-list li::before{
  content:"";flex:none;width:8px;height:8px;margin-top:10px;
  background:var(--c-accent);border-radius:2px;
}

/* ---------- checklist ---------- */
.check-wrap{display:grid;grid-template-columns:1.35fr .65fr;gap:32px;align-items:start}
.check-list{
  border:1px solid var(--c-line);border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(19,30,52,.42),rgba(10,17,32,.5));
  overflow:hidden;
}
.check-item{
  display:flex;align-items:center;gap:16px;
  padding:18px 22px;min-height:72px;
  border-bottom:1px solid var(--c-line);
  transition:background var(--dur) var(--ease);
}
.check-item:last-child{border-bottom:0}
.check-item:hover{background:rgba(61,139,255,.06)}
.check-num{
  flex:none;width:34px;height:34px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:600;color:var(--c-accent);
  background:rgba(42,224,192,.10);border:1px solid rgba(42,224,192,.22);
}
.check-text strong{display:block;font-size:15.5px;font-weight:600}
.check-text span{font-size:13.5px;color:var(--c-text-3)}
.check-tag{
  margin-left:auto;flex:none;
  font-size:12px;padding:4px 11px;border-radius:var(--r-pill);
  color:var(--c-text-2);background:rgba(120,170,255,.10);
  border:1px solid var(--c-line);
}
.check-tag.warm{color:var(--c-warm);background:rgba(242,178,76,.12);border-color:rgba(242,178,76,.3)}
.note-card{
  padding:26px;border-radius:var(--r-card);
  background:var(--c-panel);border:1px solid var(--c-line);
  box-shadow:var(--sh-card);
  backdrop-filter:blur(var(--blur));-webkit-backdrop-filter:blur(var(--blur));
}
.note-card h3{font-size:18px;margin-bottom:12px}
.note-card p{font-size:14.5px;color:var(--c-text-2)}
.note-meta{
  margin-top:20px;padding-top:16px;border-top:1px solid var(--c-line);
  display:flex;flex-direction:column;gap:10px;
  font-size:13px;color:var(--c-text-3);
}
.note-meta b{color:var(--c-text);font-weight:600}

/* ---------- summary cards ---------- */
.summary-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:20px}
.summary-card{
  padding:26px;border-radius:var(--r-card);
  background:var(--c-panel);border:1px solid var(--c-line);
  box-shadow:var(--sh-card);
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.summary-card:hover{border-color:rgba(61,139,255,.4);transform:translateY(-2px)}
.summary-card .ic{
  width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(61,139,255,.12);border:1px solid var(--c-line);
  color:var(--c-accent);margin-bottom:16px;
}
.summary-card h3{font-size:18px;margin-bottom:10px}
.summary-card p{font-size:14.5px;color:var(--c-text-2)}

/* ---------- faq ---------- */
.faq{max-width:880px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{
  border:1px solid var(--c-line);border-radius:var(--r-card);
  background:var(--c-panel);box-shadow:var(--sh-card);
  backdrop-filter:blur(var(--blur));-webkit-backdrop-filter:blur(var(--blur));
  overflow:hidden;
}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;
  padding:18px 22px;background:transparent;border:0;text-align:left;
  font-size:16px;font-weight:600;cursor:pointer;color:var(--c-text);
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.faq-q:hover{color:var(--c-accent)}
.faq-q:active{background:rgba(61,139,255,.06)}
.faq-sign{
  margin-left:auto;flex:none;width:26px;height:26px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--c-line);color:var(--c-accent);
  font-size:16px;line-height:1;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.faq-item.open .faq-sign{transform:rotate(45deg);border-color:var(--c-accent)}
.faq-item.open{border-left:2px solid var(--c-accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--dur) var(--ease)}
.faq-a p{padding:0 22px 20px 22px;font-size:15px;line-height:1.9;color:var(--c-text-2)}

/* ---------- cta band ---------- */
.cta-band{
  margin:0 auto;max-width:1200px;
  padding:34px 36px;
  display:flex;align-items:center;gap:28px;flex-wrap:wrap;
  border-radius:var(--r-card);
  background:var(--c-panel);border:1px solid var(--c-line);
  box-shadow:var(--sh-card);
  backdrop-filter:blur(var(--blur));-webkit-backdrop-filter:blur(var(--blur));
}
.cta-band h2{font-size:clamp(19px,1.9vw,24px)}
.cta-band p{margin-top:8px;font-size:13.5px;color:var(--c-text-3)}
.cta-band .cta-act{margin-left:auto;display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--c-deep);border-top:1px solid var(--c-line);margin-top:96px}
.foot-top{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding:64px 0 44px;
}
.foot-brand p{margin-top:16px;font-size:14px;color:var(--c-text-2);max-width:330px}
.foot-col h4{font-size:14px;color:var(--c-text);margin-bottom:16px;font-weight:600}
.foot-col a{display:block;font-size:14px;color:var(--c-text-2);margin-bottom:10px;transition:color var(--dur) var(--ease),transform var(--dur) var(--ease)}
.foot-col a:hover{color:var(--c-accent);transform:translateX(2px)}
.foot-mid{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0;border-top:1px solid var(--c-line);
  font-size:13px;color:var(--c-text-3);
}
.foot-bottom{
  height:56px;
  background-image:
    linear-gradient(rgba(120,170,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,170,255,.05) 1px,transparent 1px);
  background-size:44px 44px;
  opacity:.7;
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{padding:0 28px}
  .search-box{width:210px}
}
@media (max-width:1100px){
  .zig-row{gap:36px}
  .check-wrap{grid-template-columns:1fr}
  .summary-grid{grid-template-columns:1fr 1fr}
  .summary-grid .summary-card:first-child{grid-column:span 2}
}
@media (max-width:900px){
  .container{padding:0 24px}
  .section{padding:78px 0}
  .nav-list{
    position:fixed;left:0;right:0;top:64px;bottom:0;
    display:none;flex-direction:column;align-items:stretch;gap:4px;
    padding:24px;margin:0;
    background:rgba(8,13,25,.97);
    backdrop-filter:blur(var(--blur));-webkit-backdrop-filter:blur(var(--blur));
    border-top:1px solid var(--c-line);
    overflow-y:auto;
  }
  .nav-list.open{display:flex}
  .nav-list a{padding:14px 16px;font-size:16px;border-radius:12px}
  .nav-list a.active::after{display:none}
  .nav-list a.active{background:rgba(42,224,192,.12)}
  .search-box{display:none}
  .nav-quick{display:none}
  .burger{display:inline-flex}
  .zig-row{grid-template-columns:1fr}
  .zig-row.rev .zig-media{order:0}
  .zig-media img{height:250px}
  .zig{gap:52px}
  .foot-top{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .page-hero{min-height:auto;padding:38px 0}
  .hero-sub{font-size:15px}
  .hero-actions .btn{flex:1 1 auto}
  .zig-media img{height:210px}
  .summary-grid{grid-template-columns:1fr}
  .summary-grid .summary-card:first-child{grid-column:auto}
  .cta-band{padding:26px 22px}
  .cta-band .cta-act{margin-left:0;width:100%}
  .cta-band .cta-act .btn{flex:1 1 auto}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .logo span{font-size:15px}
  .btn-sm{padding:8px 12px;font-size:13px}
  .check-item{padding:16px;gap:12px;align-items:flex-start}
  .check-tag{margin-left:0;display:none}
  .foot-top{grid-template-columns:1fr}
  .site-footer{margin-top:64px}
}

/* roulang page: category2 */
:root{
  --c-void:#05080F;
  --c-deep:#0A1120;
  --c-panel:rgba(19,30,52,.55);
  --c-line:rgba(120,170,255,.14);
  --c-primary:#3D8BFF;
  --c-primary-dim:#1B5FD6;
  --c-accent:#2AE0C0;
  --c-warm:#F2B24C;
  --c-text:#E9EFFA;
  --c-text-2:#9FB0CB;
  --c-text-3:#6B7C99;
  --c-danger:#FF6B6B;
  --r-card:16px;
  --r-btn:10px;
  --r-pill:999px;
  --r-input:10px;
  --sh-card:inset 0 1px 0 rgba(255,255,255,.04), 0 18px 40px -20px rgba(0,0,0,.85);
  --sh-glow:0 0 0 1px rgba(42,224,192,.35), 0 10px 34px rgba(42,224,192,.20);
  --blur:14px;
  --dur:.22s;
  --ease:cubic-bezier(.4,0,.2,1);
  --sp-section:120px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--c-void);
  color:var(--c-text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Inter,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(120,170,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,170,255,.035) 1px, transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(circle at 50% 0%, #000 0%, transparent 70%);
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease)}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em;font-weight:600}
p{margin:0}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;position:relative;z-index:1}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:500;
  padding:12px 22px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(100deg,var(--c-primary),var(--c-accent));
  color:#05121A;
  font-weight:600;
  box-shadow:0 6px 20px -8px rgba(42,224,192,.55);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--sh-glow)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px -8px rgba(42,224,192,.45)}
.btn-primary:disabled{filter:saturate(.4);box-shadow:none;cursor:not-allowed;transform:none}
.btn-ghost{
  background:transparent;
  border-color:var(--c-line);
  color:var(--c-text);
}
.btn-ghost:hover{border-color:var(--c-primary);background:rgba(61,139,255,.10);color:#fff}
.btn-ghost:active{background:rgba(61,139,255,.18)}
.btn-ghost:disabled{filter:saturate(.4);cursor:not-allowed;color:var(--c-text-3)}
.btn-sm{padding:9px 16px;font-size:14px}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,8,15,.72);
  border-bottom:1px solid transparent;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),backdrop-filter var(--dur) var(--ease);
}
.site-header.scrolled{
  background:rgba(5,8,15,.82);
  backdrop-filter:blur(var(--blur));
  -webkit-backdrop-filter:blur(var(--blur));
  border-bottom-color:var(--c-line);
}
.nav-wrap{display:flex;align-items:center;gap:28px;height:64px}
.logo{
  display:inline-flex;align-items:center;gap:9px;
  font-size:16px;font-weight:600;color:var(--c-text);
  letter-spacing:.2px;
}
.logo:hover{color:#fff}
.logo-mark{width:30px;height:30px;flex:none}
.nav-list{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-list a{
  position:relative;
  font-size:14.5px;color:var(--c-text-2);
  padding:8px 12px;border-radius:8px;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.nav-list a:hover{color:var(--c-text);background:rgba(61,139,255,.08)}
.nav-list a.active{color:var(--c-text)}
.nav-list a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--c-accent);border-radius:2px;
  box-shadow:0 0 10px rgba(42,224,192,.7);
}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:8px;
  width:250px;height:38px;padding:0 10px;
  border:1px solid var(--c-line);
  border-radius:var(--r-input);
  background:rgba(10,17,32,.7);
  color:var(--c-text-3);
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.search-box:focus-within{border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(42,224,192,.15)}
.search-box input{
  flex:1;min-width:0;background:transparent;border:none;outline:none;
  color:var(--c-text);font-size:13.5px;
}
.search-box input::placeholder{color:var(--c-text-3)}
.kbd{
  font-size:11px;color:var(--c-text-3);
  border:1px solid var(--c-line);border-radius:6px;
  padding:1px 5px;line-height:1.6;
}
.nav-quick{font-size:14px;color:var(--c-text-2)}
.nav-quick:hover{color:var(--c-accent)}
.burger{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--r-btn);
  background:transparent;border:1px solid var(--c-line);color:var(--c-text);
  cursor:pointer;
}
.burger:hover{border-color:var(--c-primary);color:#fff}
.mobile-panel{
  display:none;
  border-top:1px solid var(--c-line);
  background:rgba(5,8,15,.96);
  backdrop-filter:blur(var(--blur));
  -webkit-backdrop-filter:blur(var(--blur));
  padding:18px 0 24px;
}
.mobile-panel.open{display:block}
.mobile-panel .container{display:flex;flex-direction:column;gap:6px}
.mobile-panel a{
  padding:12px 14px;border-radius:10px;font-size:15px;color:var(--c-text-2);
  border:1px solid transparent;
}
.mobile-panel a:hover,.mobile-panel a.active{
  color:var(--c-text);background:rgba(61,139,255,.10);border-color:var(--c-line);
}
.mobile-panel .btn{margin-top:10px}

/* ============ 页首 Hero ============ */
.page-hero{
  position:relative;
  min-height:264px;
  display:flex;align-items:flex-end;
  padding:56px 0 44px;
  overflow:hidden;
  background-image:linear-gradient(180deg,rgba(5,8,15,.78),rgba(5,8,15,.94)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--c-line);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(circle at 1px 1px, rgba(42,224,192,.14) 1px, transparent 0);
  background-size:30px 30px;
  opacity:.5;
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--c-text-3);margin-bottom:18px;
}
.breadcrumb a{color:var(--c-text-2)}
.breadcrumb a:hover{color:var(--c-accent)}
.breadcrumb span.sep{color:var(--c-text-3);opacity:.7}
.page-hero h1{
  font-size:clamp(28px,3.4vw,46px);
  font-weight:700;
  max-width:820px;
}
.page-hero .lede{
  margin-top:16px;max-width:640px;
  font-size:16px;color:var(--c-text-2);line-height:1.8;
}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;line-height:1;
  padding:7px 12px;border-radius:var(--r-pill);
  color:var(--c-accent);
  background:rgba(42,224,192,.12);
  border:1px solid rgba(42,224,192,.22);
}
.pill.warm{color:var(--c-warm);background:rgba(242,178,76,.12);border-color:rgba(242,178,76,.26)}
.pill.mute{color:var(--c-text-2);background:rgba(120,170,255,.08);border-color:var(--c-line)}

/* ============ 区块通用 ============ */
.section{padding:var(--sp-section) 0}
.section.alt{background:var(--c-deep);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section-head{max-width:720px;margin-bottom:40px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;color:var(--c-accent);letter-spacing:.06em;margin-bottom:14px;
}
.eyebrow::before{content:"";width:3px;height:14px;background:var(--c-accent);border-radius:2px}
.section-head h2{font-size:clamp(22px,2.4vw,34px);font-weight:700}
.section-head p{margin-top:14px;color:var(--c-text-2);font-size:15.5px}

/* ============ 数据卡 ============ */
.stat-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:34px;
}
.stat-card{
  background:var(--c-panel);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  backdrop-filter:blur(var(--blur));
  -webkit-backdrop-filter:blur(var(--blur));
  padding:22px 20px;
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.stat-card:hover{border-color:rgba(61,139,255,.45);transform:translateY(-2px)}
.stat-num{
  font-family:Inter,"PingFang SC",system-ui,sans-serif;
  font-size:30px;font-weight:700;color:var(--c-accent);
  letter-spacing:-.02em;line-height:1.2;
}
.stat-label{margin-top:6px;font-size:14px;color:var(--c-text-2)}
.stat-note{margin-top:8px;font-size:12.5px;color:var(--c-text-3)}

/* ============ 步骤流 ============ */
.steps{max-width:900px}
.step{
  position:relative;
  padding:0 0 38px 76px;
}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:19px;top:46px;bottom:4px;width:2px;
  background:linear-gradient(180deg,rgba(42,224,192,.55),rgba(120,170,255,.10));
}
.step:last-child::before{display:none}
.step-num{
  position:absolute;left:0;top:0;
  width:40px;height:40px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--c-deep);
  border:1px solid rgba(42,224,192,.42);
  color:var(--c-accent);
  font-size:14px;font-weight:600;
  box-shadow:0 0 0 6px rgba(42,224,192,.06),0 0 18px -4px rgba(42,224,192,.55);
}
.step h3{font-size:19px;font-weight:600;margin-bottom:8px}
.step p{color:var(--c-text-2);font-size:15px;line-height:1.8;max-width:640px}
.step-meta{
  display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;
}
.step-meta span{
  font-size:12.5px;color:var(--c-text-3);
  border:1px solid var(--c-line);border-radius:var(--r-pill);
  padding:4px 10px;
}

/* ============ 图文 + 明细 ============ */
.split{
  display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start;
}
.figure{
  border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
  background:var(--c-panel);
  box-shadow:var(--sh-card);
}
.figure img{width:100%;aspect-ratio:16/11;object-fit:cover}
.figure figcaption{
  padding:14px 18px;font-size:13px;color:var(--c-text-3);
  border-top:1px solid var(--c-line);
}
.spec-list{border-top:1px solid var(--c-line)}
.spec-row{
  display:grid;grid-template-columns:150px 1fr;gap:20px;
  padding:18px 4px;
  border-bottom:1px solid var(--c-line);
  transition:background-color var(--dur) var(--ease);
}
.spec-row:hover{background:rgba(61,139,255,.06)}
.spec-row dt{font-size:15px;font-weight:600;color:var(--c-text);margin:0}
.spec-row dd{margin:0;font-size:14.5px;color:var(--c-text-2);line-height:1.8}
.spec-row dd em{font-style:normal;color:var(--c-accent)}

/* ============ 保障卡（不同骨架，横向条列） ============ */
.assure{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;background:rgba(10,17,32,.6);
}
.assure-item{
  padding:26px 26px 28px;
  border-right:1px solid var(--c-line);
  transition:background-color var(--dur) var(--ease);
}
.assure-item:last-child{border-right:none}
.assure-item:hover{background:rgba(61,139,255,.07)}
.assure-item h3{font-size:17px;margin-bottom:10px}
.assure-item p{font-size:14.5px;color:var(--c-text-2)}
.assure-item .ico{
  width:36px;height:36px;border-radius:9px;
  display:grid;place-items:center;margin-bottom:14px;
  border:1px solid var(--c-line);color:var(--c-accent);
  background:rgba(42,224,192,.07);
}

/* ============ FAQ ============ */
.faq{max-width:880px;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--c-panel);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  backdrop-filter:blur(var(--blur));
  -webkit-backdrop-filter:blur(var(--blur));
  overflow:hidden;
  position:relative;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:2px;
  background:var(--c-accent);opacity:0;transition:opacity var(--dur) var(--ease);
}
.faq-item.open::before{opacity:1}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:transparent;border:none;cursor:pointer;
  color:var(--c-text);font-size:16px;font-weight:600;text-align:left;
  transition:color var(--dur) var(--ease);
}
.faq-q:hover{color:var(--c-accent)}
.faq-q .plus{
  flex:none;width:22px;height:22px;position:relative;
  transition:transform var(--dur) var(--ease);
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;background:var(--c-accent);border-radius:2px;
}
.faq-q .plus::before{left:0;right:0;top:10px;height:1.6px}
.faq-q .plus::after{top:0;bottom:0;left:10px;width:1.6px}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height var(--dur) var(--ease);
}
.faq-a p{
  padding:0 22px 20px;font-size:15px;line-height:1.9;color:var(--c-text-2);
}

/* ============ CTA 带 ============ */
.cta-band{
  background:var(--c-panel);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  backdrop-filter:blur(var(--blur));
  -webkit-backdrop-filter:blur(var(--blur));
  padding:34px 36px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(20px,2vw,27px)}
.cta-band p{margin-top:10px;color:var(--c-text-2);font-size:14.5px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-note{margin-top:14px;font-size:12.5px;color:var(--c-text-3)}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:0;
  background:var(--c-deep);
  border-top:1px solid var(--c-line);
  position:relative;
}
.foot-top{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding:64px 0 48px;
}
.foot-brand p{margin-top:16px;font-size:14px;color:var(--c-text-2);line-height:1.8;max-width:330px}
.foot-col h4{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--c-text)}
.foot-col a{display:block;font-size:14px;color:var(--c-text-2);padding:6px 0}
.foot-col a:hover{color:var(--c-accent)}
.foot-mid{
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:20px 0 34px;border-top:1px solid var(--c-line);
  font-size:12.5px;color:var(--c-text-3);
}
.foot-bottom{
  height:56px;
  background-image:radial-gradient(circle at 1px 1px, rgba(42,224,192,.16) 1px, transparent 0);
  background-size:26px 26px;
  opacity:.45;
  border-top:1px solid rgba(120,170,255,.08);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  :root{--sp-section:104px}
  .nav-list a{padding:8px 9px;font-size:14px}
  .search-box{width:210px}
}
@media (max-width:1023px){
  :root{--sp-section:84px}
  .container{padding:0 24px}
  .nav-list,.nav-quick{display:none}
  .burger{display:inline-flex}
  .split{grid-template-columns:1fr;gap:32px}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .assure{grid-template-columns:1fr}
  .assure-item{border-right:none;border-bottom:1px solid var(--c-line)}
  .assure-item:last-child{border-bottom:none}
  .foot-top{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  :root{--sp-section:62px}
  .container{padding:0 18px}
  .nav-wrap{height:56px;gap:12px}
  .search-box{display:none}
  .logo{font-size:15px}
  .page-hero{padding:40px 0 34px;min-height:220px}
  .step{padding:0 0 32px 58px}
  .step-num{width:34px;height:34px;font-size:13px}
  .step::before{left:16px;top:40px}
  .step h3{font-size:17px}
  .spec-row{grid-template-columns:1fr;gap:6px}
  .cta-band{padding:26px 22px}
  .faq-q{font-size:15px;padding:16px 18px}
  .faq-a p{padding:0 18px 18px}
  .foot-top{grid-template-columns:1fr;padding:48px 0 36px}
  .foot-mid{flex-direction:column;gap:8px}
}
@media (max-width:480px){
  .stat-grid{grid-template-columns:1fr}
  .stat-card:nth-child(n+4){display:none}
  .page-hero::after{display:none}
  .btn{width:100%}
  .cta-actions{width:100%}
}

/* roulang page: category3 */
:root{
  --c-void:#05080F;
  --c-deep:#0A1120;
  --c-panel:rgba(19,30,52,.55);
  --c-line:rgba(120,170,255,.14);
  --c-primary:#3D8BFF;
  --c-primary-dim:#1B5FD6;
  --c-accent:#2AE0C0;
  --c-warm:#F2B24C;
  --c-text:#E9EFFA;
  --c-text-2:#9FB0CB;
  --c-text-3:#6B7C99;
  --c-danger:#FF6B6B;
  --r-card:16px;
  --r-sub:12px;
  --r-btn:10px;
  --r-pill:999px;
  --r-input:10px;
  --sh-card:inset 0 1px 0 rgba(255,255,255,.04),0 18px 40px -20px rgba(0,0,0,.85);
  --sh-glow:0 0 0 1px rgba(42,224,192,.35),0 10px 34px rgba(42,224,192,.20);
  --blur:14px;
  --dur:.22s;
  --ease:cubic-bezier(.4,0,.2,1);
  --maxw:1200px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background-color:var(--c-void);
  background-image:
    linear-gradient(rgba(120,170,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,170,255,.035) 1px,transparent 1px);
  background-size:88px 88px;
  color:var(--c-text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Inter,Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--c-primary);text-decoration:none;transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);}
a:hover{color:var(--c-accent);}
button{font-family:inherit;font-size:inherit;cursor:pointer;}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
h1,h2,h3,h4{letter-spacing:-.01em;line-height:1.3;font-weight:600;color:var(--c-text);}
p{font-size:16px;line-height:1.85;color:var(--c-text-2);}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;}

.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 32px;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  white-space:nowrap;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-primary{
  background-image:linear-gradient(100deg,var(--c-primary),var(--c-accent));
  color:#05121A;
  box-shadow:0 6px 20px -8px rgba(42,224,192,.55);
}
.btn-primary:hover{
  color:#05121A;
  transform:translateY(-2px);
  box-shadow:var(--sh-glow);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px -8px rgba(42,224,192,.45);}
.btn-primary:disabled{filter:saturate(.4);opacity:.6;box-shadow:none;cursor:not-allowed;transform:none;}
.btn-ghost{
  background:transparent;
  border-color:var(--c-line);
  color:var(--c-text);
}
.btn-ghost:hover{
  border-color:var(--c-primary);
  background:rgba(61,139,255,.10);
  color:var(--c-text);
}
.btn-ghost:active{background:rgba(61,139,255,.18);}
.btn-ghost:disabled{filter:saturate(.4);opacity:.55;cursor:not-allowed;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(5,8,15,.88);
  border-bottom:1px solid transparent;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),backdrop-filter var(--dur) var(--ease);
}
.site-header.scrolled{
  background:rgba(10,17,32,.74);
  -webkit-backdrop-filter:blur(var(--blur));
  backdrop-filter:blur(var(--blur));
  border-bottom-color:var(--c-line);
}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:20px;
  height:64px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--c-text);
  font-size:17px;
  font-weight:700;
  letter-spacing:-.01em;
  flex:0 0 auto;
}
.logo:hover{color:var(--c-text);}
.logo-mark{width:30px;height:30px;flex:0 0 auto;}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  margin-left:8px;
}
.nav-list a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  border-radius:var(--r-pill);
  font-size:14.5px;
  font-weight:500;
  color:var(--c-text-2);
}
.nav-list a:hover{color:var(--c-text);background:rgba(61,139,255,.09);}
.nav-list a.active{color:var(--c-text);background:rgba(42,224,192,.10);}
.nav-list a.active::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--c-accent);
}
.nav-right{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:auto;
}
.search-box{
  display:flex;
  align-items:center;
  gap:8px;
  width:250px;
  height:38px;
  padding:0 10px;
  border:1px solid var(--c-line);
  border-radius:var(--r-input);
  background:rgba(10,17,32,.72);
  color:var(--c-text-3);
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.search-box:focus-within{
  border-color:var(--c-accent);
  box-shadow:0 0 0 3px rgba(42,224,192,.16);
}
.search-box input{
  flex:1 1 auto;
  min-width:0;
  border:0;
  background:transparent;
  color:var(--c-text);
  font-size:14px;
  outline:none;
}
.search-box input::placeholder{color:var(--c-text-3);}
.search-box .kbd{
  flex:0 0 auto;
  padding:1px 6px;
  border:1px solid var(--c-line);
  border-radius:6px;
  font-size:11px;
  color:var(--c-text-3);
  line-height:1.6;
}
.nav-quick{
  font-size:14px;
  font-weight:500;
  color:var(--c-text-2);
}
.nav-quick:hover{color:var(--c-accent);}
.burger{
  display:none;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  border:1px solid var(--c-line);
  border-radius:var(--r-btn);
  background:transparent;
  color:var(--c-text);
}
.burger:hover{border-color:var(--c-primary);background:rgba(61,139,255,.10);}

/* ---------- 页首 ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--c-line);
}
.page-hero .hero-bg{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.6;
}
.page-hero .hero-mask{
  position:absolute;
  inset:0;
  background:
    linear-gradient(180deg,rgba(5,8,15,.62),rgba(5,8,15,.86)),
    rgba(5,8,15,.30);
}
.page-hero .hero-inner{
  position:relative;
  z-index:2;
  padding:40px 0 44px;
  min-height:240px;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--c-text-3);
  margin-bottom:16px;
  flex-wrap:wrap;
}
.crumb a{color:var(--c-text-3);}
.crumb a:hover{color:var(--c-accent);}
.crumb .sep{opacity:.6;}
.page-hero h1{
  font-size:clamp(28px,3.6vw,44px);
  font-weight:700;
  max-width:820px;
}
.page-hero .hero-sub{
  margin-top:14px;
  max-width:720px;
  font-size:15.5px;
  line-height:1.8;
  color:var(--c-text-2);
}

/* ---------- 主体布局 ---------- */
main{display:block;}
.section{padding:72px 0;}
.section-tight{padding:56px 0;}
.layout{
  display:grid;
  grid-template-columns:282px minmax(0,1fr);
  gap:32px;
  align-items:start;
}

/* 侧栏 */
.aside-card{
  position:sticky;
  top:88px;
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  background:var(--c-panel);
  -webkit-backdrop-filter:blur(var(--blur));
  backdrop-filter:blur(var(--blur));
  box-shadow:var(--sh-card);
  padding:18px;
}
.aside-title{
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--c-text-3);
  text-transform:uppercase;
  margin-bottom:12px;
}
.aside-nav{display:flex;flex-direction:column;gap:2px;}
.aside-nav a{
  position:relative;
  display:block;
  padding:9px 12px 9px 14px;
  border-radius:var(--r-btn);
  font-size:14.5px;
  color:var(--c-text-2);
}
.aside-nav a::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  transform:translateY(-50%) scaleY(0);
  width:2px;
  height:18px;
  border-radius:2px;
  background:var(--c-accent);
  transition:transform var(--dur) var(--ease);
}
.aside-nav a:hover{color:var(--c-text);background:rgba(61,139,255,.08);}
.aside-nav a.active{color:var(--c-text);background:rgba(42,224,192,.10);}
.aside-nav a.active::before{transform:translateY(-50%) scaleY(1);}
.aside-extra{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--c-line);
}
.aside-extra h3{font-size:15px;font-weight:600;}
.aside-extra p{font-size:13px;line-height:1.7;color:var(--c-text-3);margin-top:6px;}
.aside-extra .btn{width:100%;margin-top:12px;}

/* 内容流 */
.content-flow{min-width:0;}
.block + .block{margin-top:64px;}
.block-title{
  display:flex;
  align-items:center;
  gap:12px;
  font-size:clamp(21px,2.2vw,28px);
  font-weight:600;
  margin-bottom:20px;
}
.block-title::before{
  content:"";
  flex:0 0 auto;
  width:3px;
  height:20px;
  border-radius:2px;
  background:var(--c-accent);
}
.block-lead{
  font-size:16px;
  line-height:1.9;
  color:var(--c-text-2);
  max-width:760px;
}
.block-lead + .block-lead{margin-top:14px;}

/* 清单行 */
.check-list{margin-top:26px;border-top:1px solid var(--c-line);}
.check-row{
  display:grid;
  grid-template-columns:38px minmax(0,1fr);
  gap:16px;
  padding:20px 4px;
  border-bottom:1px solid var(--c-line);
  transition:background-color var(--dur) var(--ease);
}
.check-row:hover{background:rgba(61,139,255,.05);}
.check-row .ico{
  display:flex;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  border:1px solid var(--c-line);
  border-radius:var(--r-sub);
  background:rgba(42,224,192,.08);
  color:var(--c-accent);
}
.check-row h3{font-size:17px;font-weight:600;}
.check-row p{font-size:14px;line-height:1.75;color:var(--c-text-2);margin-top:6px;}

/* 步骤 */
.steps{margin-top:28px;position:relative;}
.step{
  position:relative;
  display:grid;
  grid-template-columns:44px minmax(0,1fr);
  gap:18px;
  padding-bottom:34px;
}
.step:last-child{padding-bottom:0;}
.step::before{
  content:"";
  position:absolute;
  left:21px;
  top:46px;
  bottom:0;
  width:1px;
  background:linear-gradient(180deg,rgba(42,224,192,.45),rgba(120,170,255,.10));
}
.step:last-child::before{display:none;}
.step-num{
  display:flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:50%;
  border:1px solid rgba(42,224,192,.45);
  background:rgba(5,8,15,.85);
  color:var(--c-accent);
  font-size:15px;
  font-weight:600;
  box-shadow:0 0 0 4px rgba(42,224,192,.06);
}
.step-body h3{font-size:18px;font-weight:600;}
.step-body p{font-size:14.5px;line-height:1.8;color:var(--c-text-2);margin-top:8px;max-width:720px;}
.step-tag{
  display:inline-block;
  margin-bottom:10px;
  padding:3px 10px;
  border-radius:var(--r-pill);
  background:rgba(42,224,192,.12);
  color:var(--c-accent);
  font-size:12px;
  font-weight:500;
  letter-spacing:.02em;
}

/* 图文区块 */
.figure-block{
  margin-top:30px;
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--c-deep);
}
.figure-block img{
  width:100%;
  height:auto;
  aspect-ratio:16 / 9;
  object-fit:cover;
}
.figure-block figcaption{
  padding:12px 18px;
  font-size:13px;
  color:var(--c-text-3);
  border-top:1px solid var(--c-line);
}

/* 对照卡 */
.compare{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
  margin-top:28px;
}
.compare-col{
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  background:var(--c-panel);
  -webkit-backdrop-filter:blur(var(--blur));
  backdrop-filter:blur(var(--blur));
  box-shadow:var(--sh-card);
  padding:22px;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.compare-col:hover{transform:translateY(-2px);}
.compare-col.risk{border-color:rgba(255,107,107,.28);}
.compare-col.solid{border-color:rgba(42,224,192,.30);}
.compare-col h3{
  font-size:16px;
  font-weight:600;
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
}
.dot{
  width:8px;
  height:8px;
  border-radius:50%;
  flex:0 0 auto;
}
.dot-risk{background:var(--c-danger);}
.dot-solid{background:var(--c-accent);}
.compare-col li{
  position:relative;
  padding:11px 0 11px 20px;
  font-size:14px;
  line-height:1.75;
  color:var(--c-text-2);
  border-bottom:1px dashed rgba(120,170,255,.12);
}
.compare-col li:last-child{border-bottom:0;}
.compare-col li::before{
  content:"";
  position:absolute;
  left:2px;
  top:19px;
  width:6px;
  height:6px;
  border-radius:2px;
}
.compare-col.risk li::before{background:rgba(255,107,107,.75);}
.compare-col.solid li::before{background:var(--c-accent);}

/* 数据条 */
.stats{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  margin-top:28px;
}
.stat{
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  background:var(--c-panel);
  -webkit-backdrop-filter:blur(var(--blur));
  backdrop-filter:blur(var(--blur));
  box-shadow:var(--sh-card);
  padding:18px;
}
.stat strong{
  display:block;
  font-family:Inter,"PingFang SC",system-ui,sans-serif;
  font-size:26px;
  font-weight:700;
  color:var(--c-accent);
  letter-spacing:-.02em;
}
.stat span{
  display:block;
  margin-top:6px;
  font-size:13px;
  color:var(--c-text-2);
  line-height:1.6;
}

/* 维护清单 */
.maint-list{
  margin-top:26px;
  display:grid;
  gap:12px;
}
.maint-item{
  display:flex;
  align-items:flex-start;
  gap:12px;
  padding:14px 16px;
  border:1px solid var(--c-line);
  border-radius:var(--r-sub);
  background:rgba(19,30,52,.38);
  font-size:14.5px;
  line-height:1.75;
  color:var(--c-text-2);
  transition:border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.maint-item:hover{border-color:rgba(61,139,255,.4);background:rgba(61,139,255,.07);}
.maint-item svg{flex:0 0 auto;margin-top:5px;color:var(--c-accent);}

/* FAQ */
.faq{max-width:880px;margin-top:24px;display:grid;gap:12px;}
.faq-item{
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  background:var(--c-panel);
  -webkit-backdrop-filter:blur(var(--blur));
  backdrop-filter:blur(var(--blur));
  box-shadow:var(--sh-card);
  overflow:hidden;
  transition:border-color var(--dur) var(--ease);
}
.faq-item:hover{border-color:rgba(61,139,255,.34);}
.faq-q{
  position:relative;
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 20px 18px 22px;
  border:0;
  background:transparent;
  color:var(--c-text);
  font-size:16px;
  font-weight:600;
  text-align:left;
}
.faq-q::before{
  content:"";
  position:absolute;
  left:0;
  top:14px;
  bottom:14px;
  width:2px;
  border-radius:2px;
  background:var(--c-accent);
  transform:scaleY(0);
  transform-origin:top;
  transition:transform var(--dur) var(--ease);
}
.faq-item.open .faq-q::before{transform:scaleY(1);}
.faq-ico{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  justify-content:center;
  width:26px;
  height:26px;
  border:1px solid var(--c-line);
  border-radius:50%;
  color:var(--c-accent);
  font-size:16px;
  font-weight:500;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.faq-item.open .faq-ico{transform:rotate(45deg);border-color:rgba(42,224,192,.5);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height var(--dur) var(--ease);
}
.faq-a-in{padding:0 22px 20px 22px;}
.faq-a-in p{font-size:15px;line-height:1.9;color:var(--c-text-2);}

/* CTA 带 */
.cta-band{
  border-top:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
  background:
    linear-gradient(120deg,rgba(61,139,255,.10),rgba(42,224,192,.08)),
    rgba(10,17,32,.7);
  -webkit-backdrop-filter:blur(var(--blur));
  backdrop-filter:blur(var(--blur));
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:36px 0;
  flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(20px,2.1vw,26px);font-weight:600;}
.cta-inner .cta-note{
  margin-top:8px;
  font-size:12px;
  color:var(--c-text-3);
  letter-spacing:.01em;
}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* 页脚 */
.site-footer{
  background:var(--c-deep);
  border-top:1px solid var(--c-line);
  margin-top:0;
}
.foot-top{
  display:grid;
  grid-template-columns:1.6fr repeat(3,1fr);
  gap:32px;
  padding:56px 0 36px;
}
.foot-brand p{
  margin-top:14px;
  font-size:14px;
  line-height:1.75;
  color:var(--c-text-3);
  max-width:320px;
}
.foot-col h4{
  font-size:14px;
  font-weight:600;
  color:var(--c-text);
  margin-bottom:14px;
}
.foot-col a{
  display:block;
  padding:5px 0;
  font-size:14px;
  color:var(--c-text-3);
}
.foot-col a:hover{color:var(--c-accent);}
.foot-mid{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:18px 0 22px;
  border-top:1px solid var(--c-line);
  font-size:12.5px;
  color:var(--c-text-3);
}
.foot-bottom{
  height:72px;
  border-top:1px solid var(--c-line);
  background-image:
    radial-gradient(circle at 18% 50%,rgba(42,224,192,.16) 0 2px,transparent 2px),
    radial-gradient(circle at 50% 50%,rgba(61,139,255,.16) 0 2px,transparent 2px),
    radial-gradient(circle at 82% 50%,rgba(42,224,192,.16) 0 2px,transparent 2px),
    linear-gradient(90deg,transparent 17.6%,rgba(120,170,255,.10) 18%,transparent 18.4%,transparent 49.6%,rgba(120,170,255,.10) 50%,transparent 50.4%,transparent 81.6%,rgba(120,170,255,.10) 82%,transparent 82.4%);
}

/* 空态与状态样式 */
.is-empty{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
  padding:44px 20px;
  border:1px dashed var(--c-line);
  border-radius:var(--r-card);
  color:var(--c-text-3);
  font-size:14px;
  text-align:center;
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .nav-list a{padding:8px 10px;font-size:14px;}
  .search-box{width:210px;}
  .layout{grid-template-columns:250px minmax(0,1fr);gap:26px;}
}
@media (max-width:1023px){
  .container{padding:0 24px;}
  .nav-list,.search-box,.nav-quick{display:none;}
  .burger{display:inline-flex;}
  .site-header.menu-open{
    background:rgba(5,8,15,.96);
    -webkit-backdrop-filter:blur(var(--blur));
    backdrop-filter:blur(var(--blur));
    border-bottom-color:var(--c-line);
  }
  .site-header.menu-open .nav-list{
    display:flex;
    position:absolute;
    left:0;
    right:0;
    top:64px;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    padding:16px 24px 22px;
    background:rgba(10,17,32,.96);
    -webkit-backdrop-filter:blur(var(--blur));
    backdrop-filter:blur(var(--blur));
    border-bottom:1px solid var(--c-line);
    box-shadow:0 24px 48px -28px rgba(0,0,0,.9);
  }
  .site-header.menu-open .nav-list a{padding:12px 14px;font-size:15px;}
  .site-header.menu-open .nav-list a.active::after{bottom:6px;}
  .site-header.menu-open .search-box{
    display:flex;
    position:absolute;
    left:0;
    right:0;
    top:calc(64px + 236px);
  }
  .layout{grid-template-columns:1fr;}
  .aside-card{position:static;}
  .section{padding:64px 0;}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));}
  .foot-top{grid-template-columns:1fr 1fr;gap:28px;padding:44px 0 28px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  body{font-size:15px;}
  .nav-wrap{height:56px;}
  .site-header.menu-open .nav-list{top:56px;}
  .page-hero .hero-inner{padding:32px 0 34px;min-height:210px;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
  .block + .block{margin-top:48px;}
  .compare{grid-template-columns:1fr;}
  .stats{grid-template-columns:1fr 1fr;}
  .cta-inner{padding:28px 0;flex-direction:column;align-items:flex-start;}
  .foot-top{grid-template-columns:1fr;gap:24px;}
  .foot-mid{flex-direction:column;align-items:flex-start;}
  .faq-q{font-size:15px;padding:16px 16px 16px 18px;}
  .faq-a-in{padding:0 18px 18px;}
}
@media (max-width:480px){
  body{background-image:none;}
  .stats{grid-template-columns:1fr;}
  .step{grid-template-columns:36px minmax(0,1fr);gap:14px;}
  .step-num{width:36px;height:36px;font-size:14px;}
  .step::before{left:17px;top:38px;}
  .check-row{grid-template-columns:32px minmax(0,1fr);gap:12px;}
  .check-row .ico{width:32px;height:32px;}
  .foot-bottom{height:52px;}
}

/* roulang page: category4 */
:root{
  --c-void:#05080F;
  --c-deep:#0A1120;
  --c-panel:rgba(19,30,52,.55);
  --c-panel-2:rgba(19,30,52,.78);
  --c-line:rgba(120,170,255,.14);
  --c-primary:#3D8BFF;
  --c-primary-dim:#1B5FD6;
  --c-accent:#2AE0C0;
  --c-warm:#F2B24C;
  --c-text:#E9EFFA;
  --c-text-2:#9FB0CB;
  --c-text-3:#6B7C99;
  --r-card:16px;
  --r-btn:10px;
  --r-pill:999px;
  --r-input:10px;
  --sh-card:inset 0 1px 0 rgba(255,255,255,.04),0 18px 40px -20px rgba(0,0,0,.85);
  --sh-glow:0 0 0 1px rgba(42,224,192,.35),0 10px 34px rgba(42,224,192,.20);
  --blur:14px;
  --dur:.22s;
  --ease:cubic-bezier(.4,0,.2,1);
  --sp-section:112px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-void);
  color:var(--c-text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Inter,Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease),opacity var(--dur) var(--ease)}
a:hover{color:var(--c-accent)}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em;font-weight:650;color:var(--c-text)}
h1{font-size:clamp(28px,3.6vw,52px)}
h2{font-size:clamp(22px,2.4vw,34px)}
h3{font-size:20px}
h4{font-size:16px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
input,button{font-size:inherit}
::selection{background:rgba(42,224,192,.28);color:#fff}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-primary{
  background:linear-gradient(100deg,var(--c-primary),var(--c-accent));
  color:#05121A;
  box-shadow:0 0 0 1px rgba(42,224,192,.22),0 8px 24px rgba(42,224,192,.18);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--sh-glow);color:#05121A}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(42,224,192,.18),0 4px 14px rgba(42,224,192,.14)}
.btn-primary:disabled{background:#20304a;color:#7c8ca6;box-shadow:none;cursor:not-allowed;transform:none;filter:saturate(.6)}
.btn-ghost{
  background:transparent;border:1px solid var(--c-line);color:var(--c-text);
}
.btn-ghost:hover{border-color:var(--c-primary);background:rgba(61,139,255,.10);color:var(--c-text)}
.btn-ghost:active{background:rgba(61,139,255,.16)}
.btn-block{width:100%}

/* ===== 导航 ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,8,15,.72);
  border-bottom:1px solid transparent;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),backdrop-filter var(--dur) var(--ease);
}
.site-header.scrolled{
  background:rgba(5,8,15,.82);
  backdrop-filter:blur(var(--blur));
  -webkit-backdrop-filter:blur(var(--blur));
  border-bottom-color:var(--c-line);
}
.nav-wrap{display:flex;align-items:center;gap:24px;min-height:64px}
.logo{display:inline-flex;align-items:center;gap:9px;font-size:16px;font-weight:650;color:var(--c-text);letter-spacing:-.01em}
.logo:hover{color:var(--c-text)}
.logo-mark{width:28px;height:28px;flex:none}
.nav-list{display:flex;align-items:center;gap:4px;margin-left:8px;flex:1}
.nav-list a{
  position:relative;padding:8px 12px;border-radius:var(--r-pill);
  font-size:14.5px;color:var(--c-text-2);font-weight:500;
}
.nav-list a:hover{color:var(--c-text);background:rgba(61,139,255,.08)}
.nav-list a.active{color:var(--c-text);background:rgba(42,224,192,.10);box-shadow:inset 0 0 0 1px rgba(42,224,192,.22)}
.nav-list a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--c-accent);box-shadow:0 0 10px rgba(42,224,192,.6);
}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:8px;
  width:250px;height:40px;padding:0 10px 0 12px;
  background:rgba(10,17,32,.72);
  border:1px solid var(--c-line);border-radius:var(--r-input);
  color:var(--c-text-3);
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.search-box:focus-within{border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(42,224,192,.16);color:var(--c-accent)}
.search-box input{
  flex:1;min-width:0;background:transparent;border:0;outline:none;
  color:var(--c-text);font-size:14px;
}
.search-box input::placeholder{color:var(--c-text-3)}
.kbd{
  font-size:11px;line-height:1;padding:4px 6px;border-radius:6px;
  border:1px solid var(--c-line);color:var(--c-text-3);background:rgba(255,255,255,.03);
}
.nav-quick{font-size:14px;color:var(--c-text-2)}
.nav-quick:hover{color:var(--c-accent)}
.burger{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--r-btn);
  background:transparent;border:1px solid var(--c-line);color:var(--c-text);cursor:pointer;
}
.burger:hover{border-color:var(--c-primary);background:rgba(61,139,255,.10)}

/* ===== 分类页 Hero ===== */
.page-hero{
  position:relative;
  min-height:264px;
  display:flex;align-items:center;
  padding:56px 0;
  background-color:var(--c-deep);
  background-image:linear-gradient(rgba(5,8,15,.72),rgba(5,8,15,.88)),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--c-line);
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(120,170,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,170,255,.06) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(120% 90% at 20% 30%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(120% 90% at 20% 30%,#000 0%,transparent 78%);
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--c-text-3);margin-bottom:14px;
}
.breadcrumb a{color:var(--c-text-2)}
.breadcrumb a:hover{color:var(--c-accent)}
.breadcrumb span.sep{color:var(--c-text-3);opacity:.6}
.page-hero h1{max-width:820px}
.page-hero .hero-sub{
  margin-top:14px;max-width:660px;font-size:16px;line-height:1.8;color:var(--c-text-2);
}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:500;
  color:var(--c-accent);background:rgba(42,224,192,.12);
  border:1px solid rgba(42,224,192,.22);
}
.tag-warm{color:var(--c-warm);background:rgba(242,178,76,.12);border-color:rgba(242,178,76,.26)}
.tag-plain{color:var(--c-text-2);background:rgba(255,255,255,.04);border-color:var(--c-line)}

/* ===== 板块通用 ===== */
.section{padding:var(--sp-section) 0}
.section-alt{background:var(--c-deep);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section-head{max-width:720px;margin-bottom:38px}
.section-head h2{position:relative;padding-left:14px}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.22em;width:3px;height:18px;border-radius:2px;
  background:var(--c-accent);box-shadow:0 0 12px rgba(42,224,192,.55);
}
.section-head p{margin-top:12px;color:var(--c-text-2);font-size:15.5px;line-height:1.8}

/* ===== 支持布局：左网格 + 右资料卡 ===== */
.support-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start}
.qa-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.qa-card{
  position:relative;display:flex;flex-direction:column;
  padding:24px 22px 20px;
  background:var(--c-panel);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.qa-card::before{
  content:"";position:absolute;left:22px;top:0;width:42px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent));opacity:.7;
}
.qa-card:hover{transform:translateY(-2px);border-color:rgba(61,139,255,.42);box-shadow:inset 0 1px 0 rgba(255,255,255,.05),0 22px 46px -22px rgba(0,0,0,.9)}
.qa-icon{
  width:38px;height:38px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--c-line);background:rgba(61,139,255,.10);color:var(--c-primary);
  margin-bottom:16px;
}
.qa-card h3{font-size:17px;font-weight:600;line-height:1.5}
.qa-card p{margin-top:10px;font-size:14px;line-height:1.75;color:var(--c-text-2)}
.qa-foot{
  margin-top:18px;padding-top:14px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:12.5px;color:var(--c-text-3);
}
.qa-foot a{color:var(--c-accent);font-weight:500}
.qa-foot a:hover{color:#7ff0dd}

/* ===== 右侧资料卡 ===== */
.side-card{
  position:sticky;top:88px;
  padding:24px 22px;
  background:var(--c-panel);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  backdrop-filter:blur(var(--blur));
  -webkit-backdrop-filter:blur(var(--blur));
  box-shadow:var(--sh-card);
}
.side-card + .side-card{margin-top:20px}
.side-card h3{font-size:16px;font-weight:650;display:flex;align-items:center;gap:8px}
.side-card h3 .dot{width:7px;height:7px;border-radius:50%;background:var(--c-accent);box-shadow:0 0 10px rgba(42,224,192,.8)}
.side-links{margin-top:16px;display:flex;flex-direction:column}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:12px 0;font-size:14.5px;color:var(--c-text-2);
  border-bottom:1px solid var(--c-line);
}
.side-links a:last-child{border-bottom:0}
.side-links a:hover{color:var(--c-text);padding-left:4px}
.side-links a .arrow{color:var(--c-text-3);transition:transform var(--dur) var(--ease),color var(--dur) var(--ease)}
.side-links a:hover .arrow{transform:translateX(3px);color:var(--c-accent)}
.side-meta{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.side-meta .row{display:flex;align-items:center;justify-content:space-between;font-size:13.5px;color:var(--c-text-2)}
.side-meta .row b{font-weight:600;color:var(--c-text);font-variant-numeric:tabular-nums}
.side-card .btn{margin-top:20px}
.side-note{margin-top:12px;font-size:12.5px;line-height:1.7;color:var(--c-text-3)}

/* ===== 支持通道 ===== */
.channel-list{display:flex;flex-direction:column;gap:14px}
.channel-row{
  display:grid;grid-template-columns:56px 1.1fr 2fr auto;gap:20px;align-items:center;
  padding:22px 24px;
  background:linear-gradient(180deg,rgba(19,30,52,.42),rgba(19,30,52,.18));
  border:1px solid var(--c-line);border-radius:var(--r-card);
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.channel-row:hover{border-color:rgba(61,139,255,.4);transform:translateY(-2px)}
.channel-num{
  font-size:20px;font-weight:650;font-variant-numeric:tabular-nums;
  color:var(--c-accent);letter-spacing:.02em;
}
.channel-name{font-size:17px;font-weight:600}
.channel-name small{display:block;margin-top:4px;font-size:12.5px;font-weight:400;color:var(--c-text-3);letter-spacing:0}
.channel-desc{font-size:14px;line-height:1.75;color:var(--c-text-2)}
.channel-time{
  justify-self:end;text-align:right;font-size:13px;color:var(--c-text-2);
  padding:6px 14px;border-radius:var(--r-pill);
  border:1px solid var(--c-line);background:rgba(255,255,255,.03);white-space:nowrap;
}

/* ===== CTA 带 ===== */
.cta-band{padding:0 0 var(--sp-section)}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:34px 36px;
  background:linear-gradient(100deg,rgba(61,139,255,.14),rgba(42,224,192,.10) 60%,rgba(19,30,52,.5));
  border:1px solid var(--c-line);border-radius:var(--r-card);
  backdrop-filter:blur(var(--blur));
  -webkit-backdrop-filter:blur(var(--blur));
  box-shadow:var(--sh-card);
}
.cta-inner h2{font-size:clamp(20px,2vw,26px)}
.cta-inner .cta-sub{margin-top:8px;font-size:14px;color:var(--c-text-2)}
.cta-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.cta-note{font-size:12px;color:var(--c-text-3);width:100%}

/* ===== 页脚 ===== */
.site-footer{position:relative;background:var(--c-deep);border-top:1px solid var(--c-line);margin-top:0}
.foot-top{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;
  padding:64px 0 44px;
}
.foot-brand p{margin-top:16px;max-width:340px;font-size:14px;line-height:1.8;color:var(--c-text-2)}
.foot-col h4{font-size:14px;font-weight:600;color:var(--c-text);margin-bottom:16px}
.foot-col a{display:block;font-size:14px;color:var(--c-text-2);padding:6px 0}
.foot-col a:hover{color:var(--c-accent)}
.foot-mid{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0;border-top:1px solid var(--c-line);
  font-size:13px;color:var(--c-text-3);
}
.foot-bottom{
  height:56px;
  background-image:
    linear-gradient(rgba(120,170,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,170,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:linear-gradient(180deg,#000,transparent);
  -webkit-mask-image:linear-gradient(180deg,#000,transparent);
}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  :root{--sp-section:88px}
  .support-layout{grid-template-columns:minmax(0,1fr) 292px;gap:24px}
  .search-box{width:210px}
}
@media (max-width:1023px){
  :root{--sp-section:80px}
  .container{padding:0 24px}
  .nav-list{display:none}
  .nav-quick{display:none}
  .search-box{width:180px}
  .burger{display:inline-flex}
  .support-layout{grid-template-columns:1fr}
  .side-card{position:static}
  .page-hero{min-height:236px;padding:44px 0}
  .foot-top{grid-template-columns:1fr 1fr;gap:28px;padding:52px 0 36px}
  .foot-brand{grid-column:1 / -1}
  .channel-row{grid-template-columns:44px 1fr auto;grid-template-areas:"num name time" "num desc desc";row-gap:10px}
  .channel-num{grid-area:num;align-self:start}
  .channel-name{grid-area:name}
  .channel-desc{grid-area:desc}
  .channel-time{grid-area:time;justify-self:end}
}
@media (max-width:767px){
  :root{--sp-section:60px}
  .container{padding:0 18px}
  .nav-wrap{min-height:56px;gap:12px}
  .search-box{display:none}
  .nav-list{
    position:fixed;top:56px;left:0;right:0;bottom:0;
    display:flex;flex-direction:column;align-items:stretch;gap:2px;
    margin:0;padding:20px 18px 32px;
    background:rgba(5,8,15,.97);
    backdrop-filter:blur(var(--blur));
    -webkit-backdrop-filter:blur(var(--blur));
    border-top:1px solid var(--c-line);
    opacity:0;transform:translateY(-6px);pointer-events:none;
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
    overflow-y:auto;
  }
  body.nav-open .nav-list{opacity:1;transform:none;pointer-events:auto}
  .nav-list a{padding:14px 12px;font-size:16px;border-radius:var(--r-btn)}
  .nav-list a.active::after{left:12px;right:auto;width:28px;bottom:8px}
  .qa-grid{grid-template-columns:1fr}
  .page-hero{min-height:216px;padding:36px 0}
  .page-hero .hero-sub{font-size:15px}
  .section-head{margin-bottom:28px}
  .cta-inner{padding:26px 22px}
  .channel-row{grid-template-columns:1fr;grid-template-areas:"name" "desc" "time";gap:10px;padding:20px}
  .channel-num{font-size:15px;color:var(--c-text-3);grid-area:name;justify-self:start;margin-bottom:-6px}
  .channel-time{justify-self:start}
  .foot-top{grid-template-columns:1fr;gap:24px;padding:44px 0 30px}
  .foot-mid{flex-direction:column;align-items:flex-start;gap:8px;line-height:1.7}
  .btn{padding:11px 18px}
}
@media (max-width:480px){
  .hero-tags{display:none}
  .page-hero::after{display:none}
  .foot-bottom{height:36px}
  .qa-card{padding:20px 18px}
}