/* roulang page: index */
:root{
  --ink-900:#070A0F;
  --ink-800:#0C121A;
  --ink-700:#131B26;
  --neon:#2BF0A8;
  --cyan:#17D6E8;
  --violet:#6E7BFF;
  --amber:#FFC24B;
  --text:#E8EEF5;
  --muted:#93A3B5;
  --line:rgba(255,255,255,.08);
  --danger:#FF6B6B;
  --grad:linear-gradient(120deg,#2BF0A8 0%,#17D6E8 46%,#6E7BFF 100%);
  --r-lg:24px;
  --r-md:18px;
  --r-sm:12px;
  --shadow-card:0 18px 44px -20px rgba(0,0,0,.85);
  --shadow-hover:0 24px 60px -22px rgba(43,240,168,.28);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.5) 0 1px,transparent 1px 64px),
                   repeating-linear-gradient(90deg,rgba(255,255,255,.5) 0 1px,transparent 1px 64px);
  opacity:.035;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit}
input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.section{padding:96px 0}
.section-alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.18em;font-weight:600;color:var(--neon);margin-bottom:14px}
.h2-bar{width:56px;height:3px;background:var(--grad);border-radius:2px;margin-bottom:16px}
.h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.32;letter-spacing:.01em}
.h3{font-size:21px;font-weight:650;line-height:1.45}
.lead{font-size:16px;color:var(--muted);line-height:1.9}
.muted{color:var(--muted)}
.small{font-size:13px;color:var(--muted)}

/* 顶栏 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,10,15,.88);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.site-header::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:.9;
}
.nav-wrap{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:24px;height:24px;border-radius:7px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;color:#06121A;flex:none;
  box-shadow:0 0 16px rgba(43,240,168,.35);
}
.brand-mark svg{width:14px;height:14px;display:block}
.brand-text{font-size:17px;letter-spacing:.02em;white-space:nowrap}
.brand-text strong{font-weight:800;color:var(--text)}
.brand-text em{font-style:normal;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-menu{display:flex;align-items:center;gap:30px}
.nav-link{
  position:relative;font-size:15px;color:var(--muted);padding:24px 0;
  transition:color .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:16px;width:0;height:2px;background:var(--grad);
  border-radius:2px;transition:width .22s ease;
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--neon);text-shadow:0 0 12px rgba(43,240,168,.45)}
.nav-link.active::after{width:100%}
.nav-right{display:flex;align-items:center;gap:14px;flex:none}
.hamburger{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--ink-800);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:.25s}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.mobile-drawer{
  position:fixed;inset:0;z-index:80;background:#070A0F;padding:96px 20px 40px;
  transform:translateY(-102%);visibility:hidden;transition:transform .3s ease,visibility .3s;
  overflow-y:auto;
}
.mobile-drawer.open{transform:translateY(0);visibility:visible}
.drawer-link{
  display:block;position:relative;font-size:18px;line-height:56px;color:var(--muted);
  border-bottom:1px solid var(--line);padding-left:14px;
}
.drawer-link.active{color:var(--neon)}
.drawer-link.active::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;background:var(--neon);
}
.drawer-cta{margin-top:28px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;transition:all .22s ease;white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#06121A}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 4px rgba(43,240,168,.16);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{background:transparent;border-color:rgba(43,240,168,.55);color:var(--neon)}
.btn-ghost:hover{background:rgba(43,240,168,.09);box-shadow:inset 0 0 0 1px rgba(43,240,168,.35)}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:10px}
.link-more{font-size:14px;color:var(--muted);transition:color .2s,text-decoration-color .2s}
.link-more:hover{color:var(--neon);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}

/* Hero */
.hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(7,10,15,.92) 0%,rgba(7,10,15,.86) 45%,rgba(7,10,15,.97) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  padding:88px 0 92px;
}
.hero::after{
  content:"";position:absolute;top:-180px;left:-140px;width:620px;height:620px;border-radius:50%;
  background:radial-gradient(circle,rgba(43,240,168,.22) 0%,rgba(43,240,168,0) 68%);
  pointer-events:none;
}
.hero-inner{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;position:relative;z-index:1}
.h1{
  font-size:clamp(30px,4.4vw,52px);font-weight:800;line-height:1.22;letter-spacing:.01em;
}
.h1-grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:18px;color:var(--muted);margin-top:18px}
.hero-points{margin-top:26px;display:flex;flex-direction:column;gap:12px}
.hero-points li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--text)}
.hero-points i{color:var(--neon);margin-top:5px;font-size:13px}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px}
.hero-note{margin-top:14px;font-size:13px;color:var(--muted)}

.entry-card{
  position:relative;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--shadow-card);overflow:hidden;
}
.entry-card::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad)}
.entry-steps{margin-top:22px;display:flex;flex-direction:column;gap:16px}
.entry-step{display:flex;gap:14px;align-items:flex-start}
.step-num{
  width:34px;height:34px;flex:none;border-radius:10px;background:rgba(43,240,168,.08);
  border:1px solid rgba(43,240,168,.28);color:var(--neon);font-size:13px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
}
.entry-step p{font-size:14px;color:var(--muted);line-height:1.7}
.entry-step strong{display:block;font-size:15px;color:var(--text);font-weight:650;margin-bottom:2px}
.entry-badge{
  margin-top:24px;display:flex;align-items:center;gap:12px;padding:14px 16px;border-radius:14px;
  background:rgba(255,194,75,.06);border:1px solid rgba(255,194,75,.22);
}
.entry-badge b{font-size:26px;font-weight:800;color:var(--amber);line-height:1}
.entry-badge span{font-size:13px;color:var(--muted)}

/* 标签 */
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;color:var(--neon);background:rgba(43,240,168,.09);
  border:1px solid rgba(43,240,168,.26);
}
.tag-amber{color:var(--amber);background:rgba(255,194,75,.08);border-color:rgba(255,194,75,.26)}

/* 卡片 */
.card{
  position:relative;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--shadow-card);transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
  height:100%;display:flex;flex-direction:column;
}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:.85;z-index:2}
.card:hover{transform:translateY(-4px);border-color:rgba(43,240,168,.45);box-shadow:var(--shadow-hover)}
.card-cover{display:block;position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink-800)}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .32s ease}
.card-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,10,15,.1) 0%,rgba(7,10,15,.82) 100%)}
.card:hover .card-cover img{transform:scale(1.04)}
.card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-title{font-size:19px;font-weight:650;line-height:1.5}
.card-title a:hover{color:var(--neon)}
.card-excerpt{font-size:14px;color:var(--muted);line-height:1.85;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:10px}
.card-foot .time{font-size:13px;color:var(--amber)}
.arrow-link{font-size:13px;color:var(--muted);transition:color .2s,transform .2s}
.card:hover .arrow-link{color:var(--neon)}

/* 大卡与非对称 */
.feature-card{
  position:relative;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--shadow-card);transition:.3s;
}
.feature-card::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad)}
.feature-card:hover{border-color:rgba(43,240,168,.45);box-shadow:var(--shadow-hover)}
.feature-media{aspect-ratio:16/9;overflow:hidden;position:relative;background:var(--ink-800)}
.feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .32s ease}
.feature-card:hover .feature-media img{transform:scale(1.04)}
.feature-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,10,15,.15) 0%,rgba(7,10,15,.75) 100%)}
.feature-body{padding:26px 28px 28px}
.bullet-list{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.bullet-list li{position:relative;padding-left:18px;font-size:15px;color:var(--muted)}
.bullet-list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:2px;
  background:var(--grad);
}
.mini-card{
  position:relative;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--shadow-card);transition:.3s;
}
.mini-card::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:.7;border-radius:var(--r-md) var(--r-md) 0 0}
.mini-card:hover{transform:translateY(-4px);border-color:rgba(43,240,168,.45);box-shadow:var(--shadow-hover)}
.mini-num{font-size:13px;font-weight:800;color:var(--neon);letter-spacing:.14em}

.cap-tags{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.cap-tag{
  display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 18px;border-radius:999px;
  background:var(--ink-800);border:1px solid var(--line);font-size:14px;color:var(--text);transition:.25s;
}
.cap-tag i{color:var(--neon);font-size:12px}
.cap-tag:hover{border-color:rgba(43,240,168,.45);background:rgba(43,240,168,.06)}

/* 数据 */
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.stat-item{
  position:relative;padding:22px;border-radius:var(--r-md);
  background:rgba(43,240,168,.06);border:1px solid rgba(43,240,168,.22);
}
.stat-item.amber{background:rgba(255,194,75,.06);border-color:rgba(255,194,75,.22)}
.stat-head{display:flex;align-items:center;gap:8px;margin-bottom:10px}
.stat-dot{width:6px;height:6px;border-radius:50%;background:var(--neon);box-shadow:0 0 10px rgba(43,240,168,.9)}
.stat-item.amber .stat-dot{background:var(--amber);box-shadow:0 0 10px rgba(255,194,75,.9)}
.stat-num{font-size:36px;font-weight:800;line-height:1.05}
.stat-item.amber .stat-num{color:var(--amber)}
.stat-unit{font-size:13px;color:var(--muted);margin-left:6px}
.stat-label{font-size:14px;color:var(--muted);margin-top:6px}

.bar-group{margin-top:28px;display:flex;flex-direction:column;gap:18px}
.bar-row{display:flex;align-items:center;gap:16px}
.bar-row .bar-name{width:120px;flex:none;font-size:14px;color:var(--muted)}
.bar{flex:1;height:8px;border-radius:999px;background:rgba(255,255,255,.06);overflow:hidden}
.bar > i{display:block;height:100%;border-radius:999px;background:var(--grad)}
.bar-pct{width:48px;text-align:right;font-size:14px;font-weight:700;color:var(--neon)}

/* 案例 */
.case-row{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.case-row + .case-row{margin-top:72px}
.case-media{border-radius:var(--r-lg);overflow:hidden;aspect-ratio:16/10;border:1px solid var(--line);position:relative;background:var(--ink-800)}
.case-media img{width:100%;height:100%;object-fit:cover}
.case-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,10,15,.12) 0%,rgba(7,10,15,.6) 100%)}
.case-result{margin-top:20px;display:flex;align-items:baseline;gap:10px}
.case-result b{font-size:30px;font-weight:800;color:var(--amber);line-height:1}
.case-result span{font-size:14px;color:var(--muted)}

/* 方案阶梯 */
.plan-stack{display:flex;flex-direction:column;gap:20px}
.plan{
  position:relative;display:grid;grid-template-columns:4fr 5fr 3fr;gap:28px;align-items:center;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 32px;transition:.3s;box-shadow:var(--shadow-card);
}
.plan::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:.6;border-radius:var(--r-lg) var(--r-lg) 0 0}
.plan:hover{transform:translateY(-4px);border-color:rgba(43,240,168,.45);box-shadow:var(--shadow-hover)}
.plan.featured{border-color:rgba(43,240,168,.45);background:linear-gradient(180deg,rgba(43,240,168,.05) 0%,rgba(19,27,38,1) 46%)}
.plan-title{font-size:21px;font-weight:700}
.plan-points{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.plan-points li{position:relative;padding-left:16px;font-size:14px;color:var(--muted)}
.plan-points li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--neon)}
.plan-cta{display:flex;justify-content:flex-end}
.ribbon{
  position:absolute;top:-12px;right:24px;height:26px;padding:0 14px;border-radius:999px;
  background:var(--grad);color:#06121A;font-size:12px;font-weight:800;display:flex;align-items:center;
}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start}
.faq-left{position:sticky;top:96px}
.faq-item{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:14px;overflow:hidden;transition:background .25s,border-color .25s;
}
.faq-item.open{background:var(--ink-700);border-color:rgba(43,240,168,.35)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:transparent;border:0;color:var(--text);
  font-size:17px;font-weight:650;text-align:left;cursor:pointer;
}
.faq-icon{color:var(--neon);font-size:16px;flex:none;transition:transform .25s}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:520px}
.faq-a-inner{
  position:relative;padding:0 24px 22px 26px;font-size:15px;line-height:1.9;color:var(--muted);
}
.faq-a-inner::before{
  content:"";position:absolute;left:22px;top:4px;bottom:22px;width:2px;border-radius:2px;background:var(--grad);
}
.faq-a-inner p{padding-left:12px}

/* 表单 */
.contact-grid{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start}
.form-card{background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-lg);padding:32px;position:relative}
.form-card::before{content:"";position:absolute;top:0;left:24px;right:24px;height:2px;background:var(--grad);border-radius:2px;opacity:.8}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field-label{display:block;font-size:14px;color:var(--muted);margin-bottom:8px}
.field{
  width:100%;background:var(--ink-700);border:1px solid var(--line);border-radius:12px;
  padding:14px 16px;font-size:15px;color:var(--text);transition:.2s;outline:none;
}
.field::placeholder{color:rgba(147,163,181,.6)}
.field:focus{border-color:var(--neon);box-shadow:0 0 0 3px rgba(43,240,168,.12)}
textarea.field{resize:vertical;min-height:120px;line-height:1.8}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  padding:10px 16px;border-radius:12px;border:1px solid var(--line);background:var(--ink-700);
  color:var(--muted);font-size:14px;cursor:pointer;transition:.2s;
}
.chip:hover{color:var(--text);border-color:rgba(43,240,168,.35)}
.chip.active{color:var(--neon);border-color:var(--neon);background:rgba(43,240,168,.08)}
.form-foot{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:22px}
.contact-line{display:flex;align-items:center;gap:12px;font-size:15px;color:var(--muted);margin-top:14px}
.contact-line i{color:var(--neon);width:18px;text-align:center}

/* 空态 */
.empty-card{
  grid-column:1/-1;background:var(--ink-700);border:1px dashed rgba(43,240,168,.3);border-radius:var(--r-lg);
  padding:56px 24px;text-align:center;
}
.empty-card i{font-size:30px;color:var(--neon);opacity:.8}
.empty-card h3{margin-top:14px;font-size:19px;font-weight:650}
.empty-card p{margin-top:8px;font-size:14px;color:var(--muted)}
.empty-card .btn{margin-top:22px}

/* 页脚 */
.site-footer{position:relative;background:var(--ink-800);border-top:1px solid var(--line);padding:72px 0 0;margin-top:0}
.site-footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:var(--grad);opacity:.8}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col h4{font-size:15px;font-weight:700;color:var(--neon);margin-bottom:16px}
.footer-link{display:block;font-size:14px;color:var(--muted);padding:6px 0;transition:color .2s,transform .2s}
.footer-link:hover{color:var(--text);transform:translateX(2px)}
.social-row{display:flex;gap:12px;margin-top:20px}
.social-box{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:var(--ink-700);
  display:flex;align-items:center;justify-content:center;color:var(--muted);transition:.25s;
}
.social-box:hover{color:var(--neon);border-color:rgba(43,240,168,.45)}
.footer-bottom{
  margin-top:56px;border-top:1px solid var(--line);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}
.footer-bottom .dots span{margin:0 8px;opacity:.5}

/* 响应式 */
@media (max-width:1279px){
  .hero-inner{grid-template-columns:7fr 5fr;gap:36px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .hero{padding:64px 0 72px}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .faq-grid{grid-template-columns:1fr;gap:32px}
  .faq-left{position:static}
  .contact-grid{grid-template-columns:1fr;gap:32px}
  .case-row{grid-template-columns:1fr;gap:28px}
  .case-row + .case-row{margin-top:56px}
  .plan{grid-template-columns:1fr;gap:20px}
  .plan-cta{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .nav-menu{display:none}
  .nav-right .btn{display:none}
  .hamburger{display:flex}
  .section{padding:56px 0}
  .hero{padding:52px 0 60px;max-height:78vh}
  .h1{font-size:clamp(30px,7.4vw,38px)}
  .hero-sub{font-size:16px}
  .hero-actions .btn{width:100%}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .brand-text{font-size:16px}
  .stat-num{font-size:30px}
  .plan{padding:24px 20px}
  .form-card{padding:24px 20px}
  .bar-row{flex-direction:column;align-items:flex-start;gap:8px}
  .bar-row .bar-name{width:auto}
  .bar{width:100%}
  .bar-pct{width:auto;text-align:left}
}
@media (max-width:520px){
  .stat-grid{grid-template-columns:1fr}
  .cap-tag{width:100%;justify-content:center}
}

/* roulang page: article */
:root{
  --ink-900:#070A0F;
  --ink-800:#0C121A;
  --ink-700:#131B26;
  --neon:#2BF0A8;
  --cyan:#17D6E8;
  --violet:#6E7BFF;
  --amber:#FFC24B;
  --text:#E8EEF5;
  --muted:#93A3B5;
  --line:rgba(255,255,255,.08);
  --danger:#FF6B6B;
  --grad:linear-gradient(120deg,#2BF0A8 0%,#17D6E8 46%,#6E7BFF 100%);
  --r-lg:24px;
  --r-md:18px;
  --r-sm:12px;
  --shadow:0 18px 44px -20px rgba(0,0,0,.85);
  --shadow-hover:0 24px 60px -22px rgba(43,240,168,.28);
  --sp-section:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background-color:var(--ink-900);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
  background-image:
    repeating-linear-gradient(0deg, rgba(255,255,255,.035) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(90deg, rgba(255,255,255,.035) 0 1px, transparent 1px 72px);
  background-attachment:fixed;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px;border-radius:6px}
::selection{background:rgba(43,240,168,.28);color:#fff}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.small{font-size:13px;color:var(--muted);line-height:1.85}

/* ============ 顶栏导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,10,15,.88);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.header-topline{position:absolute;left:0;right:0;top:0;height:2px;background:var(--grad);opacity:.9}
.header-inner{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:24px;height:24px;border-radius:7px;background:var(--grad);
  display:grid;place-items:center;flex-shrink:0;
  box-shadow:0 0 0 3px rgba(43,240,168,.12);
}
.brand-mark svg{width:15px;height:15px;stroke:#06121A}
.brand-text{font-size:18px;line-height:1;letter-spacing:.01em;white-space:nowrap}
.brand-text strong{font-weight:800;color:var(--text)}
.brand-text em{font-style:normal;font-weight:500;color:var(--neon)}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-link{position:relative;padding:10px 14px;font-size:15px;color:var(--muted);transition:color .22s}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .22s;
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--neon);text-shadow:0 0 12px rgba(43,240,168,.45)}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.hamburger{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;transition:border-color .22s;
}
.hamburger:hover{border-color:rgba(43,240,168,.45)}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .24s,opacity .24s}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-drawer{
  position:fixed;left:0;right:0;top:68px;bottom:0;z-index:55;
  background:var(--ink-900);padding:20px;overflow-y:auto;
  display:flex;flex-direction:column;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .24s ease,transform .24s ease,visibility .24s;
}
.mobile-drawer.open{opacity:1;visibility:visible;transform:none}
.drawer-link{font-size:18px;line-height:56px;padding:0 12px;color:var(--text);border-bottom:1px solid var(--line)}
.drawer-link.active{color:var(--neon);border-left:3px solid var(--neon);padding-left:14px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;letter-spacing:.01em;white-space:nowrap;
  transition:transform .22s,filter .22s,box-shadow .22s,background-color .22s,border-color .22s;
}
.btn-primary{background:var(--grad);color:#06121A}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 4px rgba(43,240,168,.16);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(1px);box-shadow:none;filter:brightness(1)}
.btn-ghost{background:transparent;border:1px solid var(--neon);color:var(--neon)}
.btn-ghost:hover{background:rgba(43,240,168,.09);box-shadow:inset 0 0 0 1px rgba(43,240,168,.55)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.link-more{color:var(--muted);font-size:14px;transition:color .22s,text-decoration-color .22s;text-decoration:underline;text-decoration-color:transparent;text-underline-offset:4px;text-decoration-thickness:2px}
.link-more:hover{color:var(--neon);text-decoration-color:var(--neon)}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--muted);padding:28px 0 22px;
}
.breadcrumb a{color:var(--muted);transition:color .22s}
.breadcrumb a:hover{color:var(--neon)}
.breadcrumb .sep{opacity:.45}
.breadcrumb .current{color:var(--neon);max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章布局 ============ */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:44px;align-items:start;
  padding-bottom:24px;
}
.article-col{min-width:0}

.article-head{margin-bottom:26px}
.cat-pill{
  display:inline-flex;align-items:center;gap:7px;
  font-size:12px;letter-spacing:.06em;color:var(--neon);
  background:rgba(43,240,168,.08);border:1px solid rgba(43,240,168,.24);
  border-radius:999px;padding:5px 13px;
}
.cat-pill::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--neon);box-shadow:0 0 8px rgba(43,240,168,.9)}
.article-title{
  font-size:clamp(28px,4vw,44px);font-weight:800;line-height:1.26;letter-spacing:.01em;
  margin:18px 0 16px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13.5px;color:var(--muted)}
.article-meta i{color:var(--neon);margin-right:5px}
.article-meta .dot{opacity:.45}

.article-cover{
  position:relative;margin:26px 0 38px;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--ink-800);aspect-ratio:16/9;
}
.article-cover img{width:100%;height:100%;object-fit:cover}
.article-cover::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top,rgba(7,10,15,.82),rgba(7,10,15,0) 60%);
}
.article-cover::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--grad);z-index:2}

/* ============ 正文排版 ============ */
.article-body{font-size:17px;line-height:1.95;color:var(--text);max-width:820px}
.article-body p{margin:0 0 22px}
.article-body > p:first-of-type{color:#F2F6FA}
.article-body h2{
  font-size:clamp(21px,2.2vw,26px);font-weight:700;line-height:1.4;
  margin:44px 0 18px;position:relative;padding-top:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:0;width:56px;height:4px;border-radius:3px;background:var(--grad);
}
.article-body h3{font-size:19px;font-weight:650;line-height:1.5;margin:32px 0 14px;color:#F2F6FA}
.article-body h3::before{content:"";display:inline-block;width:8px;height:8px;border-radius:2px;background:var(--grad);margin-right:10px;vertical-align:middle}
.article-body a{color:var(--neon);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
.article-body a:hover{text-decoration-thickness:2px}
.article-body strong{color:#fff;font-weight:700}
.article-body ul{list-style:none;padding:0;margin:0 0 22px}
.article-body ul li{position:relative;padding-left:24px;margin-bottom:12px}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:8px;height:8px;border-radius:2px;background:var(--grad);
}
.article-body ol{padding-left:24px;margin:0 0 22px}
.article-body ol li{margin-bottom:12px;padding-left:6px}
.article-body ol li::marker{color:var(--neon);font-weight:700}
.article-body blockquote{
  position:relative;margin:28px 0;padding:20px 24px 20px 28px;
  background:var(--ink-800);border-radius:var(--r-sm);color:#DCE5EE;
}
.article-body blockquote::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;background:var(--grad);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:16px;margin:26px 0;width:100%}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
.article-body code{
  font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  font-size:14px;background:rgba(255,255,255,.06);padding:2px 7px;border-radius:6px;color:var(--amber);
}
.article-body pre{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:18px 20px;overflow-x:auto;margin:24px 0;
}
.article-body pre code{background:none;padding:0;color:#DCE5EE;font-size:14px;line-height:1.8}
.article-body table{
  width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;
  border:1px solid var(--line);border-radius:var(--r-sm);overflow:hidden;
}
.article-body thead th{background:var(--ink-700);color:#F2F6FA;font-weight:650;text-align:left}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line)}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.02)}
.article-body hr{border:0;height:1px;background:var(--line);margin:34px 0}

.empty-state{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:52px 28px;text-align:center;
}
.empty-state .icon{
  width:56px;height:56px;margin:0 auto 18px;border-radius:16px;
  display:grid;place-items:center;background:rgba(43,240,168,.08);
  border:1px solid rgba(43,240,168,.24);color:var(--neon);font-size:22px;
}
.empty-state h3{font-size:19px;font-weight:650;margin-bottom:10px}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:22px}

/* ============ 标签 / 页脚导航 ============ */
.article-tags{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:42px 0 0}
.article-tags .label{font-size:13px;color:var(--muted);margin-right:4px}
.tag{
  font-size:13px;color:var(--muted);border:1px solid var(--line);border-radius:999px;
  padding:6px 14px;transition:color .22s,border-color .22s,background-color .22s;
}
.tag:hover{color:var(--neon);border-color:rgba(43,240,168,.45);background:rgba(43,240,168,.06)}

.article-divider{height:1px;background:var(--line);margin:34px 0 28px}

.foot-nav{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:56px}
.prevnext{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;flex:1;min-width:280px}
.pn-card{
  display:flex;align-items:center;gap:14px;padding:16px 18px;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-md);
  transition:border-color .28s,transform .28s,box-shadow .28s;
}
.pn-card:hover{border-color:rgba(43,240,168,.45);transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.pn-card i{color:var(--neon);font-size:14px;flex-shrink:0}
.pn-card .pn-body{min-width:0}
.pn-card .pn-label{font-size:12px;color:var(--muted);letter-spacing:.06em}
.pn-card .pn-title{
  font-size:14.5px;font-weight:600;color:var(--text);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* ============ 侧栏 ============ */
.article-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:92px}
.side-card{
  position:relative;background:var(--ink-700);border:1px solid var(--line);
  border-radius:var(--r-md);padding:22px;overflow:hidden;
}
.side-card::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--grad);opacity:.9}
.side-title{font-size:15px;font-weight:650;color:var(--neon);margin-bottom:14px;letter-spacing:.02em}
.side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 0;font-size:14px;color:var(--muted);border-bottom:1px dashed var(--line);
  transition:color .22s,transform .22s;
}
.side-list a:last-child{border-bottom:0}
.side-list a:hover{color:var(--text);transform:translateX(2px)}
.side-list a span.count{font-size:12px;color:var(--amber);font-weight:700}
.side-badge{
  background:rgba(255,194,75,.06);border:1px solid rgba(255,194,75,.22);
  border-radius:var(--r-md);padding:20px;text-align:center;
}
.side-badge .num{font-size:36px;font-weight:800;color:var(--amber);line-height:1.1}
.side-badge .num small{font-size:13px;color:var(--muted);font-weight:500;margin-left:4px}
.side-badge .cap{font-size:13.5px;color:var(--muted);margin-top:8px}

/* ============ 相关推荐 ============ */
.related{padding-top:8px;border-top:1px solid var(--line);margin-top:8px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin:40px 0 26px}
.section-head h2{font-size:clamp(22px,2.4vw,28px);font-weight:700;position:relative;padding-top:16px}
.section-head h2::before{content:"";position:absolute;left:0;top:0;width:56px;height:4px;border-radius:3px;background:var(--grad)}
.section-head p{font-size:14px;color:var(--muted);margin-top:8px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  position:relative;display:flex;flex-direction:column;overflow:hidden;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-md);
  transition:border-color .32s,transform .32s,box-shadow .32s;
}
.card::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--grad);opacity:.85;z-index:2}
.card:hover{border-color:rgba(43,240,168,.45);transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.card-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink-800)}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .32s}
.card:hover .card-cover img{transform:scale(1.04)}
.card-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(7,10,15,.82),rgba(7,10,15,0) 62%)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}
.cat-tag{
  display:inline-flex;align-items:center;align-self:flex-start;
  font-size:12px;color:var(--neon);background:rgba(43,240,168,.08);
  border:1px solid rgba(43,240,168,.22);border-radius:999px;padding:3px 11px;
}
.card-title{font-size:19px;font-weight:650;line-height:1.5;color:var(--text)}
.card-excerpt{
  font-size:14px;color:var(--muted);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px;
}
.card-meta .arrow{color:var(--neon);transition:transform .22s}
.card:hover .card-meta .arrow{transform:translateX(4px)}

/* ============ CTA 收口 ============ */
.cta-band{
  position:relative;overflow:hidden;margin:72px 0 0;
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:40px;display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:32px;align-items:center;
}
.cta-band::before{content:"";position:absolute;left:0;top:24px;bottom:24px;width:3px;border-radius:3px;background:var(--grad)}
.cta-band h2{font-size:clamp(21px,2.2vw,26px);font-weight:700;margin-bottom:12px;padding-left:22px}
.cta-band p{font-size:14.5px;color:var(--muted);line-height:1.9;padding-left:22px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end}

/* ============ 页脚 ============ */
.site-footer{position:relative;margin-top:var(--sp-section);background:var(--ink-800);border-top:1px solid var(--line)}
.site-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:var(--grad);opacity:.8}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px;padding:56px 0 40px}
.footer-col{display:flex;flex-direction:column;gap:10px;min-width:0}
.footer-col h4{font-size:15px;font-weight:650;color:var(--neon);margin-bottom:6px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.footer-brand .brand-mark{width:24px;height:24px;border-radius:7px;background:var(--grad);display:grid;place-items:center;color:#06121A;flex-shrink:0}
.footer-brand .brand-mark svg{width:15px;height:15px;stroke:#06121A}
.footer-brand .brand-text{font-size:17px}
.footer-link{
  font-size:14px;color:var(--muted);word-break:break-all;
  transition:color .22s,transform .22s;display:inline-block;
}
.footer-link:hover{color:var(--text);transform:translateX(2px)}
.footer-link i{color:var(--neon);width:16px}
.social-row{display:flex;gap:10px;margin-top:12px}
.social-box{
  width:38px;height:38px;border-radius:var(--r-sm);border:1px solid var(--line);
  display:grid;place-items:center;color:var(--muted);font-size:14px;
  transition:color .22s,border-color .22s,background-color .22s;
}
.social-box:hover{color:var(--neon);border-color:rgba(43,240,168,.45);background:rgba(43,240,168,.07)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding:20px 0 28px;font-size:13px;color:var(--muted);
}
.footer-bottom .dots{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.footer-bottom .dots span{opacity:.4}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{max-width:1120px}
}
@media (max-width:1023px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:48px}
  .article-side{position:static;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .article-body{max-width:none}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .cta-band{grid-template-columns:minmax(0,1fr)}
  .cta-actions{justify-content:flex-start}
}
@media (max-width:767px){
  :root{--sp-section:56px}
  .container{padding:0 20px}
  .nav-menu{display:none}
  .header-actions .btn{display:none}
  .hamburger{display:flex}
  .breadcrumb{padding:20px 0 16px}
  .article-title{font-size:clamp(24px,7vw,30px)}
  .article-cover{border-radius:var(--r-md);margin:20px 0 28px}
  .article-body{font-size:16.5px;line-height:1.9}
  .article-body p{margin-bottom:20px}
  .prevnext{grid-template-columns:minmax(0,1fr)}
  .foot-nav{flex-direction:column;align-items:stretch}
  .foot-nav .btn{width:100%}
  .article-side{grid-template-columns:minmax(0,1fr)}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .cta-band{padding:26px;margin-top:56px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:minmax(0,1fr);padding:40px 0 28px}
}
@media (max-width:520px){
  .brand-text{font-size:16px}
  .article-meta{font-size:13px;gap:8px}
  .article-meta span.dot{display:none}
  .article-meta span{width:100%}
}

/* roulang page: category1 */
:root{
  --ink-900:#070A0F;
  --ink-800:#0C121A;
  --ink-700:#131B26;
  --neon:#2BF0A8;
  --cyan:#17D6E8;
  --violet:#6E7BFF;
  --amber:#FFC24B;
  --danger:#FF6B6B;
  --text:#E8EEF5;
  --muted:#93A3B5;
  --line:rgba(255,255,255,.08);
  --grad:linear-gradient(120deg,#2BF0A8 0%,#17D6E8 46%,#6E7BFF 100%);
  --r-lg:24px;
  --r-md:18px;
  --r-sm:12px;
  --shadow-card:0 18px 44px -20px rgba(0,0,0,.85);
  --shadow-hover:0 24px 60px -22px rgba(43,240,168,.28);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0 1px,transparent 1px 72px),
    repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 72px);
  opacity:.55;
}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{margin:0}
p{margin:0}
ol,ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.section{padding:96px 0}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* 顶部导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,10,15,.88);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.site-header::before{content:"";display:block;height:2px;background:var(--grad)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);flex:0 0 auto}
.brand-mark{
  width:24px;height:24px;border-radius:8px;background:var(--grad);
  display:grid;place-items:center;color:#06121A;flex:0 0 auto;
}
.brand-mark svg{width:15px;height:15px}
.brand-text{font-size:18px;letter-spacing:.01em;white-space:nowrap}
.brand-text strong{font-weight:800}
.brand-text em{font-style:normal;font-weight:500;color:var(--neon)}
.nav-menu{display:flex;align-items:center;gap:30px}
.nav-link{
  position:relative;color:var(--muted);font-size:15px;text-decoration:none;
  padding:6px 2px;transition:color .2s;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .22s;
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--neon);text-shadow:0 0 12px rgba(43,240,168,.45)}
.nav-link.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  background:transparent;border:1px solid var(--line);color:var(--text);font-size:17px;cursor:pointer;
}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;text-decoration:none;border:1px solid transparent;
  cursor:pointer;transition:filter .2s,transform .2s,box-shadow .2s,background .2s,color .2s;
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#06121A}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 4px rgba(43,240,168,.16);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{background:transparent;border-color:var(--neon);color:var(--neon)}
.btn-ghost:hover{background:rgba(43,240,168,.09);box-shadow:inset 0 0 0 1px rgba(43,240,168,.4)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:10px}

/* 标签与眉标 */
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.18em;color:var(--neon);
  text-transform:none;margin-bottom:14px;
}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;
  font-size:12px;color:var(--neon);background:rgba(43,240,168,.08);
  border:1px solid rgba(43,240,168,.24);line-height:1.6;
}
.tag-amber{color:var(--amber);background:rgba(255,194,75,.08);border-color:rgba(255,194,75,.24)}
.tag-violet{color:#B7BEFF;background:rgba(110,123,255,.1);border-color:rgba(110,123,255,.28)}
.h2-rule{display:block;width:56px;height:4px;border-radius:999px;background:var(--grad);margin-bottom:18px;box-shadow:0 0 18px rgba(43,240,168,.35)}
.section-title{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.35;letter-spacing:.01em}
.section-sub{color:var(--muted);font-size:15px;margin-top:12px;max-width:640px}

/* 面包屑 */
.crumb{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);
  padding:22px 0 0;flex-wrap:wrap;
}
.crumb a{text-decoration:none}
.crumb a:hover{color:var(--neon)}
.crumb span.sep{color:rgba(147,163,181,.6)}
.crumb .now{color:var(--neon)}

/* Hero */
.hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background-image:linear-gradient(90deg,rgba(7,10,15,.96) 0%,rgba(7,10,15,.78) 55%,rgba(7,10,15,.9) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;width:520px;height:520px;right:-120px;top:-220px;
  background:radial-gradient(circle,rgba(43,240,168,.20) 0%,rgba(43,240,168,0) 68%);
  pointer-events:none;
}
.hero-inner{
  display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center;
  padding:54px 0;position:relative;z-index:2;
}
.hero h1{font-size:clamp(30px,4.4vw,46px);font-weight:800;line-height:1.22;letter-spacing:.01em}
.hero-sub{color:var(--muted);font-size:16px;margin-top:14px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.hero-points li{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--text);
  padding:7px 13px;border-radius:999px;background:rgba(255,255,255,.04);border:1px solid var(--line);
}
.hero-points i{color:var(--neon);font-size:12px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.hero-panel{
  background:rgba(12,18,26,.9);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px;position:relative;box-shadow:var(--shadow-card);
}
.hero-panel::before{
  content:"";position:absolute;top:0;left:24px;right:24px;height:2px;background:var(--grad);border-radius:0 0 3px 3px;
}
.badge-group{display:flex;gap:12px;margin-top:16px;flex-wrap:wrap}
.stat-badge{
  flex:1 1 0;min-width:96px;border-radius:var(--r-md);padding:15px 16px;
  background:rgba(43,240,168,.06);border:1px solid rgba(43,240,168,.22);
}
.stat-badge.amber{background:rgba(255,194,75,.06);border-color:rgba(255,194,75,.22)}
.stat-badge.violet{background:rgba(110,123,255,.07);border-color:rgba(110,123,255,.26)}
.dot{display:block;width:6px;height:6px;border-radius:50%;background:var(--neon);box-shadow:0 0 10px var(--neon);margin-bottom:10px}
.stat-badge.amber .dot{background:var(--amber);box-shadow:0 0 10px var(--amber)}
.stat-badge.violet .dot{background:var(--violet);box-shadow:0 0 10px var(--violet)}
.stat-num{font-size:clamp(28px,3vw,36px);font-weight:800;line-height:1;letter-spacing:-.01em}
.stat-badge.amber .stat-num{color:var(--amber)}
.stat-label{font-size:13px;color:var(--muted);margin-top:6px;line-height:1.6}

/* 主体布局 */
.layout{display:grid;grid-template-columns:3fr 9fr;gap:34px;padding:72px 0 96px}
.toc{
  position:sticky;top:96px;background:var(--ink-800);border:1px solid var(--line);
  border-radius:var(--r-md);padding:24px 20px;box-shadow:var(--shadow-card);
}
.toc::before{
  content:"";position:absolute;top:0;left:20px;right:20px;height:2px;background:var(--grad);border-radius:0 0 3px 3px;
}
.toc h4{font-size:15px;font-weight:700;margin-bottom:14px}
.toc ol{counter-reset:toc}
.toc li{counter-increment:toc}
.toc a{
  display:flex;gap:10px;align-items:flex-start;color:var(--muted);text-decoration:none;
  font-size:14px;padding:9px 0;border-bottom:1px dashed rgba(255,255,255,.06);transition:color .2s,padding-left .2s;
}
.toc li:last-child a{border-bottom:0}
.toc a::before{content:"0" counter(toc);color:rgba(43,240,168,.75);font-size:12px;font-weight:700;line-height:1.9}
.toc a:hover{color:var(--neon);padding-left:4px}
.toc-note{margin-top:16px;font-size:12px;color:var(--muted);line-height:1.7}

/* 步骤时间线 */
.timeline{margin-top:6px}
.step-item{display:grid;grid-template-columns:64px 1fr;gap:22px;padding-bottom:26px}
.step-rail{position:relative;display:flex;justify-content:center}
.step-item:not(:last-child) .step-rail::after{
  content:"";position:absolute;top:76px;bottom:-6px;left:50%;transform:translateX(-50%);
  width:2px;background:linear-gradient(180deg,rgba(43,240,168,.6) 0%,rgba(110,123,255,.16) 100%);
}
.step-index{
  width:64px;height:64px;border-radius:50%;padding:2px;background:var(--grad);
  display:grid;place-items:center;flex:0 0 auto;
}
.step-index > span{
  width:100%;height:100%;border-radius:50%;background:var(--ink-900);
  display:grid;place-items:center;color:var(--neon);font-size:18px;font-weight:800;
}
.step-card{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 24px;position:relative;transition:border-color .3s,transform .3s,box-shadow .3s;
}
.step-card::before{
  content:"";position:absolute;top:0;left:24px;right:24px;height:2px;background:var(--grad);border-radius:0 0 3px 3px;opacity:.85;
}
.step-card:hover{border-color:rgba(43,240,168,.45);transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.step-card h3{font-size:20px;font-weight:650;line-height:1.5}
.step-card p{color:var(--muted);font-size:15px;margin-top:10px}
.step-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}

/* 通用卡片网格 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;position:relative;transition:border-color .3s,transform .3s,box-shadow .3s;
}
.card:hover{border-color:rgba(43,240,168,.45);transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.card::before{
  content:"";position:absolute;top:0;left:24px;right:24px;height:2px;background:var(--grad);border-radius:0 0 3px 3px;z-index:2;
}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink-700)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .32s}
.card:hover .card-media img{transform:scale(1.04)}
.card-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,10,15,.12) 0%,rgba(7,10,15,.82) 100%);
}
.card-body{padding:20px 22px 22px}
.card-body h3{font-size:19px;font-weight:650;margin:12px 0 8px;line-height:1.5}
.card-body p{color:var(--muted);font-size:14px;line-height:1.8}

/* 清单卡 */
.check-card{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 30px;position:relative;
}
.check-card::before{
  content:"";position:absolute;top:0;left:30px;right:30px;height:2px;background:var(--grad);border-radius:0 0 3px 3px;
}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;padding:12px 0;
  border-bottom:1px dashed rgba(255,255,255,.07);font-size:15px;color:var(--text);
}
.check-list li:last-child{border-bottom:0}
.check-list i{color:var(--neon);font-size:14px;line-height:1.9;flex:0 0 auto}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:40px;align-items:start}
.faq-aside{position:sticky;top:96px}
.faq-item{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;transition:background .25s,border-color .25s;
}
.faq-item.open{background:var(--ink-700);border-color:rgba(43,240,168,.35)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:transparent;border:0;color:var(--text);
  font-size:17px;font-weight:650;text-align:left;cursor:pointer;line-height:1.6;
}
.faq-icon{color:var(--neon);font-size:20px;line-height:1;flex:0 0 auto}
.faq-icon::before{content:"+"}
.faq-item.open .faq-icon::before{content:"−"}
.faq-a{
  display:none;margin-left:22px;padding:0 22px 20px 18px;position:relative;
  color:var(--muted);font-size:15px;line-height:1.9;
}
.faq-a::before{
  content:"";position:absolute;left:0;top:4px;bottom:20px;width:2px;background:var(--grad);border-radius:2px;
}
.faq-item.open .faq-a{display:block}

/* 底部提示卡与 CTA */
.callout{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px 36px;position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.callout::before{
  content:"";position:absolute;left:0;top:26px;bottom:26px;width:3px;background:var(--grad);border-radius:3px;
}
.callout h3{font-size:22px;font-weight:650}
.callout p{color:var(--muted);font-size:15px;margin-top:10px;max-width:640px}

/* 页脚 */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);position:relative;z-index:1}
.site-footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:var(--grad)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:32px;padding:64px 0 40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-col h4{font-size:15px;font-weight:700;color:var(--neon);margin-bottom:16px}
.footer-link{
  display:block;color:var(--muted);font-size:14px;text-decoration:none;
  margin-bottom:10px;transition:color .2s,transform .2s;
}
.footer-link:hover{color:var(--text);transform:translateX(2px)}
.small{color:var(--muted);font-size:13px;line-height:1.8}
.social-row{display:flex;gap:10px;margin-top:14px}
.social-box{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--muted);text-decoration:none;transition:.2s;
}
.social-box:hover{color:var(--neon);border-color:rgba(43,240,168,.45);background:rgba(43,240,168,.06)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding:20px 0 34px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);
}
.footer-bottom .dots{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.link-more{color:var(--muted);text-decoration:none;transition:color .2s}
.link-more:hover{color:var(--neon);text-decoration:underline;text-underline-offset:4px}

/* 响应式 */
@media (max-width:1023px){
  .hero-inner{grid-template-columns:1fr;gap:28px;padding:48px 0}
  .layout{grid-template-columns:1fr;padding:56px 0 72px}
  .toc{position:static}
  .faq-wrap{grid-template-columns:1fr;gap:28px}
  .faq-aside{position:static}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .section{padding:72px 0}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .nav-menu{
    position:fixed;left:0;right:0;top:70px;bottom:0;background:#070A0F;
    flex-direction:column;align-items:stretch;gap:0;padding:16px 20px 40px;
    transform:translateX(100%);transition:transform .3s ease;overflow-y:auto;z-index:70;
    border-top:1px solid var(--line);
  }
  .nav-menu.open{transform:translateX(0)}
  .nav-link{font-size:18px;line-height:56px;padding:0;border-bottom:1px solid var(--line);color:var(--text)}
  .nav-link::after{display:none}
  .nav-link.active{padding-left:14px;box-shadow:inset 3px 0 0 var(--neon);color:var(--neon)}
  .nav-toggle{display:grid;place-items:center}
  .nav-actions .btn-sm{display:none}
  .hero-inner{padding:40px 0}
  .hero{min-height:0;max-height:78vh}
  .hero-cta .btn{width:100%}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .step-item{grid-template-columns:48px 1fr;gap:16px}
  .step-index{width:48px;height:48px}
  .step-index > span{font-size:15px}
  .step-item:not(:last-child) .step-rail::after{top:58px}
  .check-card,.callout{padding:22px 20px}
  .callout{flex-direction:column;align-items:flex-start}
  .callout .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;padding:48px 0 32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .section{padding:56px 0}
  .badge-group{flex-wrap:wrap}
  .stat-badge{flex:1 1 44%}
}

/* roulang page: category2 */
:root{
  --ink-900:#070A0F;
  --ink-800:#0C121A;
  --ink-700:#131B26;
  --neon:#2BF0A8;
  --cyan:#17D6E8;
  --violet:#6E7BFF;
  --amber:#FFC24B;
  --text:#E8EEF5;
  --muted:#93A3B5;
  --line:rgba(255,255,255,.08);
  --grad:linear-gradient(120deg,#2BF0A8 0%,#17D6E8 46%,#6E7BFF 100%);
  --r-lg:24px;
  --r-md:18px;
  --r-sm:12px;
  --shadow:0 18px 44px -20px rgba(0,0,0,.85);
  --shadow-hover:0 24px 60px -22px rgba(43,240,168,.28);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--ink-900);
  background-image:
    repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0 1px,transparent 1px 76px),
    repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 76px);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .22s ease,border-color .22s ease,background-color .22s ease}
button{font-family:inherit;font-size:inherit}
::selection{background:rgba(43,240,168,.28);color:#fff}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px;border-radius:6px}

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

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,10,15,.88);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.topline{height:2px;width:100%;background:var(--grad)}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:24px;height:24px;border-radius:8px;background:var(--grad);
  display:grid;place-items:center;color:#06121A;flex-shrink:0;
}
.brand-mark svg{width:15px;height:15px}
.brand-text{font-size:17px;line-height:1;letter-spacing:.01em;white-space:nowrap}
.brand-text strong{font-weight:800}
.brand-text em{font-style:normal;font-weight:500;color:var(--muted);margin-left:2px}

.nav-menu{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;display:block;padding:9px 14px;font-size:15px;color:var(--muted);
  border-radius:10px;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;border-radius:2px;
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--neon);text-shadow:0 0 12px rgba(43,240,168,.45)}
.nav-link.active::after{transform:scaleX(1)}

.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.hamburger{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--ink-800);color:var(--text);cursor:pointer;place-items:center;font-size:17px;
}
.hamburger:hover{border-color:rgba(43,240,168,.45);color:var(--neon)}

.mobile-drawer{
  position:fixed;inset:0;z-index:90;background:#070A0F;display:none;
  flex-direction:column;padding:20px 22px 32px;overflow-y:auto;
}
.mobile-drawer.open{display:flex}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:52px;margin-bottom:18px}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--ink-800);color:var(--text);cursor:pointer;display:grid;place-items:center;font-size:18px;
}
.drawer-link{
  display:block;font-size:18px;line-height:56px;color:var(--muted);
  border-bottom:1px solid var(--line);padding-left:14px;position:relative;
}
.drawer-link.active{color:var(--neon)}
.drawer-link.active::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:var(--grad);border-radius:3px;
}
.drawer-cta{margin-top:26px;width:100%}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-sm);border:1px solid transparent;
  font-size:15px;font-weight:700;cursor:pointer;white-space:nowrap;
  transition:transform .22s ease,box-shadow .22s ease,filter .22s ease,background-color .22s ease,border-color .22s ease,color .22s ease;
}
.btn-primary{background:var(--grad);color:#06121A}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 4px rgba(43,240,168,.16);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(1px);box-shadow:none;filter:brightness(.98)}
.btn-ghost{background:transparent;border-color:var(--neon);color:var(--neon)}
.btn-ghost:hover{background:rgba(43,240,168,.09);box-shadow:inset 0 0 0 1px rgba(43,240,168,.35)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.link-more{color:var(--muted);font-size:14px;text-decoration:none;transition:color .2s ease}
.link-more:hover{color:var(--neon);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}

/* ============ 通用排版 ============ */
.eyebrow{
  font-size:12px;letter-spacing:.18em;color:var(--neon);font-weight:600;
  text-transform:uppercase;margin:0 0 12px;
}
.h1{
  font-size:clamp(28px,3.6vw,44px);font-weight:800;line-height:1.22;
  letter-spacing:.01em;margin:0 0 16px;
}
.h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.3;margin:0 0 14px}
.h3{font-size:20px;font-weight:650;line-height:1.45;margin:0 0 10px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:17px;color:var(--muted);line-height:1.9;margin:0;max-width:640px}
.small{font-size:13.5px;color:var(--muted);line-height:1.8}
.sec-head{position:relative;padding-top:22px;margin-bottom:26px}
.sec-head::before{
  content:"";position:absolute;top:0;left:0;width:56px;height:6px;
  border-radius:6px;background:var(--grad);
}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* ============ 面包屑 ============ */
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--muted);margin:0 0 18px;align-items:center}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--neon)}
.breadcrumb .sep{color:rgba(255,255,255,.22)}
.breadcrumb .now{color:var(--neon)}

/* ============ 页首横幅 ============ */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:.22;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(720px 340px at 12% 0%,rgba(43,240,168,.20),transparent 68%),
             linear-gradient(180deg,rgba(7,10,15,.55),rgba(7,10,15,.94));
}
.hero-band{
  position:relative;z-index:2;
  display:flex;align-items:center;justify-content:space-between;gap:40px;
  padding-top:56px;padding-bottom:56px;flex-wrap:wrap;
}
.hero-copy{flex:1 1 480px;min-width:0}
.hero-badges{display:flex;gap:14px;flex-wrap:wrap}
.badge-stat{
  display:flex;align-items:center;gap:12px;
  padding:16px 20px;border-radius:var(--r-md);
  background:rgba(43,240,168,.06);border:1px solid rgba(43,240,168,.22);
}
.badge-stat.amber{background:rgba(255,194,75,.06);border-color:rgba(255,194,75,.22)}
.badge-stat .num{
  font-size:30px;font-weight:800;line-height:1;color:var(--amber);
  font-variant-numeric:tabular-nums;
}
.badge-stat .unit{font-size:13px;color:var(--muted);margin-left:3px;font-weight:500}
.badge-stat .cap{font-size:13.5px;color:var(--muted);line-height:1.5;white-space:nowrap}

/* ============ 4/8 分栏 ============ */
.split-4-8{display:grid;grid-template-columns:4fr 8fr;gap:32px;align-items:start}
.checklist-card{
  position:sticky;top:96px;
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--shadow);overflow:hidden;
}
.checklist-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);
}
.check-list{list-style:none;margin:16px 0 22px;padding:0}
.check-item{
  display:flex;gap:12px;align-items:flex-start;
  padding:13px 0;border-bottom:1px dashed var(--line);font-size:14.5px;
  line-height:1.75;color:var(--text);
}
.check-item:last-child{border-bottom:0}
.check-item i{color:var(--neon);margin-top:5px;font-size:14px;flex-shrink:0}

.card-stack{display:flex;flex-direction:column;gap:24px}
.media-card{
  position:relative;display:grid;grid-template-columns:5fr 7fr;
  background:var(--ink-700);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow);
  transition:transform .32s ease,box-shadow .32s ease,border-color .32s ease;
}
.media-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);z-index:3;
}
.media-card.flip{grid-template-columns:7fr 5fr}
.media-card.flip .media-figure{order:2}
.media-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(43,240,168,.45)}
.media-figure{position:relative;overflow:hidden;min-height:236px;background:var(--ink-800)}
.media-figure img{width:100%;height:100%;object-fit:cover;transition:transform .32s ease}
.media-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,10,15,.18),rgba(7,10,15,.72));
}
.media-card:hover .media-figure img{transform:scale(1.04)}
.media-body{padding:28px 30px;display:flex;flex-direction:column;justify-content:center}
.media-body p{margin:0;color:var(--muted);font-size:15px;line-height:1.85}
.tag-pill{
  display:inline-flex;align-items:center;gap:6px;align-self:flex-start;
  padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;
  color:var(--neon);background:rgba(43,240,168,.08);border:1px solid rgba(43,240,168,.26);
  margin-bottom:12px;
}

/* ============ 处理顺序时间线 ============ */
.step-row{
  display:grid;grid-template-columns:76px 1fr;gap:22px;align-items:flex-start;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px 26px;margin-bottom:18px;position:relative;
  transition:border-color .28s ease,transform .28s ease,box-shadow .28s ease;
}
.step-row:hover{border-color:rgba(43,240,168,.45);transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.step-num{
  width:64px;height:64px;border-radius:50%;display:grid;place-items:center;
  font-size:19px;font-weight:800;color:var(--neon);font-variant-numeric:tabular-nums;
  border:2px solid transparent;
  background:linear-gradient(var(--ink-800),var(--ink-800)) padding-box,
             var(--grad) border-box;
}
.step-row p{margin:0;color:var(--muted);font-size:15px;line-height:1.85}

/* ============ 数据带 ============ */
.data-band{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:38px 34px;display:grid;grid-template-columns:repeat(4,1fr);gap:0;
}
.data-band .cell{padding:6px 24px;position:relative}
.data-band .cell + .cell{border-left:1px solid var(--line)}
.data-band .cell:first-child{padding-left:0}
.data-band .num{
  font-size:36px;font-weight:800;line-height:1.1;color:var(--amber);
  font-variant-numeric:tabular-nums;
}
.data-band .num span{font-size:13px;color:var(--muted);font-weight:500;margin-left:4px}
.data-band .cap{font-size:14px;color:var(--muted);line-height:1.7;margin-top:8px}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start}
.faq-aside{position:sticky;top:100px}
.faq-item{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:14px;overflow:hidden;transition:background-color .28s ease,border-color .28s ease;
}
.faq-item.open{background:var(--ink-700);border-color:rgba(43,240,168,.35)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:none;border:0;color:var(--text);
  font-size:17px;font-weight:650;text-align:left;cursor:pointer;line-height:1.6;
}
.faq-q .ico{color:var(--neon);font-size:15px;flex-shrink:0;transition:transform .28s ease}
.faq-item.open .faq-q .ico{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-a-inner{
  position:relative;padding:0 26px 22px 26px;color:var(--muted);
  font-size:15px;line-height:1.9;
}
.faq-a-inner::before{
  content:"";position:absolute;left:12px;top:2px;bottom:22px;width:2px;
  background:var(--grad);border-radius:2px;
}

/* ============ CTA ============ */
.cta-panel{
  position:relative;overflow:hidden;background:var(--ink-800);
  border:1px solid var(--line);border-radius:var(--r-lg);
  padding:48px;display:grid;grid-template-columns:1fr auto;gap:34px;align-items:center;
}
.cta-panel::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);
}
.cta-panel::after{
  content:"";position:absolute;right:-120px;top:-120px;width:400px;height:400px;
  background:radial-gradient(circle,rgba(43,240,168,.16),transparent 68%);pointer-events:none;
}
.cta-panel > *{position:relative;z-index:2}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{position:relative;background:var(--ink-800);margin-top:0}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;background:var(--grad);
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;
  padding:64px 0 40px;
}
.footer-col h4{
  font-size:15px;font-weight:650;color:var(--neon);margin:0 0 16px;letter-spacing:.02em;
}
.footer-link{
  display:block;font-size:14px;color:var(--muted);padding:6px 0;margin:0;
  transition:color .2s ease,transform .2s ease;
}
.footer-link:hover{color:var(--text);transform:translateX(2px)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.social-row{display:flex;gap:10px;margin-top:18px}
.social-box{
  width:38px;height:38px;border-radius:12px;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--muted);font-size:14px;
  transition:color .22s ease,border-color .22s ease,background-color .22s ease,transform .22s ease;
}
.social-box:hover{
  color:var(--neon);border-color:rgba(43,240,168,.45);
  background:rgba(43,240,168,.06);transform:translateY(-2px);
}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 42px;
  display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}
.footer-bottom .dots{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.footer-bottom .dots span{color:rgba(255,255,255,.22)}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
  .split-4-8{grid-template-columns:1fr}
  .checklist-card{position:static}
  .faq-grid{grid-template-columns:1fr;gap:32px}
  .faq-aside{position:static}
  .data-band{grid-template-columns:repeat(2,1fr);gap:22px 0;padding:30px 26px}
  .data-band .cell:nth-child(3){padding-left:0;border-left:0}
  .data-band .cell{padding-left:22px}
  .data-band .cell:nth-child(odd){padding-left:0;border-left:0}
  .data-band .cell:nth-child(even){border-left:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;padding:52px 0 32px}
  .cta-panel{grid-template-columns:1fr;padding:38px 30px}
}
@media (max-width:900px){
  .nav-menu{display:none}
  .header-actions .btn{display:none}
  .hamburger{display:grid}
}
@media (max-width:767px){
  .container{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}
  .section-tight{padding:48px 0}
  .hero-band{padding-top:44px;padding-bottom:44px;gap:26px}
  .media-card,.media-card.flip{grid-template-columns:1fr}
  .media-card.flip .media-figure{order:0}
  .media-figure{min-height:196px;aspect-ratio:16/9}
  .media-body{padding:22px}
  .step-row{grid-template-columns:1fr;gap:14px;padding:22px}
  .step-num{width:52px;height:52px;font-size:17px}
  .data-band{grid-template-columns:1fr;padding:26px 22px;gap:0}
  .data-band .cell{padding:18px 0;border-left:0!important;border-top:1px solid var(--line)}
  .data-band .cell:first-child{border-top:0;padding-top:0}
  .cta-panel{padding:30px 22px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --ink-900:#070A0F;
  --ink-800:#0C121A;
  --ink-700:#131B26;
  --neon:#2BF0A8;
  --cyan:#17D6E8;
  --violet:#6E7BFF;
  --amber:#FFC24B;
  --danger:#FF6B6B;
  --text:#E8EEF5;
  --muted:#93A3B5;
  --line:rgba(255,255,255,.08);
  --grad:linear-gradient(120deg,#2BF0A8 0%,#17D6E8 46%,#6E7BFF 100%);
  --r-lg:24px;
  --r-md:18px;
  --r-sm:12px;
  --shadow-card:0 18px 44px -20px rgba(0,0,0,.85);
  --shadow-hover:0 24px 60px -22px rgba(43,240,168,.28);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--ink-900);
  background-image:
    repeating-linear-gradient(0deg, rgba(255,255,255,.035) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(90deg, rgba(255,255,255,.035) 0 1px, transparent 1px 46px);
  color:var(--text);
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  font-feature-settings:"tnum";
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.3}
p{margin:0}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px;border-radius:6px}
.num{font-variant-numeric:tabular-nums}

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

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,10,15,.88);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.site-header::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);
}
.header-inner{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:24px;height:24px;border-radius:8px;background:var(--grad);
  display:grid;place-items:center;color:#06121A;flex-shrink:0;
}
.brand-mark svg{width:15px;height:15px}
.brand-text{font-size:17px;letter-spacing:.01em;white-space:nowrap}
.brand-text strong{font-weight:800;color:var(--text)}
.brand-text em{font-style:normal;font-weight:500;color:var(--neon)}

.nav-menu{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;display:inline-block;padding:10px 14px 12px;
  font-size:15px;color:var(--muted);border-radius:10px;
  transition:color .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--grad);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--neon);text-shadow:0 0 12px rgba(43,240,168,.45)}
.nav-link.active::after{transform:scaleX(1)}

.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);background:transparent;color:var(--text);
  place-items:center;font-size:16px;
}
.nav-toggle:hover{border-color:rgba(43,240,168,.45);color:var(--neon)}

.drawer{
  position:fixed;inset:0;z-index:90;background:#070A0F;display:none;
  flex-direction:column;padding:18px 20px 40px;overflow-y:auto;
}
.drawer.open{display:flex}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-close{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:transparent;color:var(--text);display:grid;place-items:center;
}
.drawer .nav-link{
  display:block;font-size:18px;line-height:56px;padding:0 0 0 14px;border-radius:0;
  border-left:3px solid transparent;
}
.drawer .nav-link::after{display:none}
.drawer .nav-link.active{border-left-color:var(--neon);background:rgba(43,240,168,.05)}
.drawer-cta{margin-top:24px}

/* ============ 按钮 / 标签 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:700;letter-spacing:.01em;
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease,background .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--grad);color:#06121A}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 4px rgba(43,240,168,.16);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{background:transparent;border-color:rgba(43,240,168,.55);color:var(--neon)}
.btn-ghost:hover{background:rgba(43,240,168,.09);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:44px;padding:0 20px;font-size:14px}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.18em;color:var(--neon);
  text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--grad);border-radius:2px}
.sec-title{position:relative;padding-top:0;margin-bottom:14px}
.sec-title::before{
  content:"";display:block;width:56px;height:12px;border-radius:6px;
  background:var(--grad);margin-bottom:16px;
}
.h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;letter-spacing:.01em}
.h3{font-size:clamp(19px,1.6vw,22px);font-weight:650}
.lead{color:var(--muted);font-size:16px;line-height:1.85}
.small{font-size:13px;color:var(--muted);line-height:1.8}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

.pill{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;
  border-radius:999px;font-size:12px;font-weight:600;
  color:var(--neon);background:rgba(43,240,168,.08);border:1px solid rgba(43,240,168,.22);
}
.pill-amber{color:var(--amber);background:rgba(255,194,75,.08);border-color:rgba(255,194,75,.24)}

/* ============ 区块 ============ */
.section{padding:96px 0;position:relative}
.section + .section{border-top:1px solid var(--line)}
.section-tint{background:var(--ink-800)}

/* ============ Hero 搜索区 ============ */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:74px 0 68px}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;opacity:.22;
}
.hero-veil{
  position:absolute;inset:0;
  background:
    radial-gradient(880px 420px at 20% 6%, rgba(43,240,168,.16), transparent 66%),
    radial-gradient(700px 360px at 84% 92%, rgba(110,123,255,.14), transparent 70%),
    linear-gradient(180deg, rgba(7,10,15,.55) 0%, var(--ink-900) 90%);
}
.hero-inner{position:relative;z-index:2;max-width:880px;margin:0 auto;text-align:center}
.hero-title{
  font-size:clamp(30px,4.4vw,52px);font-weight:800;line-height:1.22;letter-spacing:.01em;
}
.hero-sub{margin-top:16px;font-size:clamp(15px,1.4vw,17px);color:var(--muted)}

.search-bar{
  display:flex;align-items:center;gap:12px;
  max-width:720px;margin:30px auto 0;padding:10px 10px 10px 22px;
  background:var(--ink-800);border:1px solid var(--line);border-radius:999px;
  box-shadow:var(--shadow-card);
}
.search-bar .fa-magnifying-glass{color:var(--muted);font-size:15px}
.search-bar input{
  flex:1;min-width:0;background:transparent;border:0;outline:none;
  font-size:15px;padding:12px 0;
}
.search-bar input::placeholder{color:#67758a}
.search-bar .btn{height:44px;border-radius:999px;padding:0 22px;white-space:nowrap}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:18px}
.chip{
  display:inline-flex;align-items:center;font-size:13px;color:var(--muted);
  border:1px solid var(--line);background:rgba(255,255,255,.02);
  border-radius:999px;padding:6px 14px;transition:.2s ease;
}
.chip:hover{color:var(--neon);border-color:rgba(43,240,168,.45);background:rgba(43,240,168,.07);transform:translateY(-1px)}
.hero-note{margin-top:20px}

/* ============ 卡片 ============ */
.card{
  position:relative;overflow:hidden;border-radius:var(--r-md);
  background:var(--ink-700);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);
}
.card:hover{transform:translateY(-4px);border-color:rgba(43,240,168,.45);box-shadow:var(--shadow-hover)}
.card-pad{padding:26px 24px 24px}
.card-lg{border-radius:var(--r-lg)}
.card-num{
  font-size:24px;font-weight:800;color:var(--amber);
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}

.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}

/* 图文自查 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.media-frame{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--ink-700);
  box-shadow:var(--shadow-card);
}
.media-frame img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .32s ease}
.media-frame:hover img{transform:scale(1.04)}
.media-frame::after{
  content:"";position:absolute;inset:auto 0 0 0;height:52%;
  background:linear-gradient(180deg, transparent, rgba(7,10,15,.82));
  pointer-events:none;
}
.check-list{list-style:none;margin:0;padding:0}
.check-list li{
  position:relative;padding-left:32px;margin-bottom:14px;color:var(--muted);font-size:15.5px;
}
.check-list li strong{color:var(--text);font-weight:650}
.check-list li::before{
  content:"";position:absolute;left:4px;top:11px;width:12px;height:7px;
  border-left:2.5px solid var(--neon);border-bottom:2.5px solid var(--neon);
  transform:rotate(-45deg);border-radius:1px;
}

/* ============ FAQ ============ */
.faq-layout{display:grid;grid-template-columns:5fr 7fr;gap:52px;align-items:start}
.faq-aside{position:sticky;top:96px}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--ink-800);margin-bottom:12px;overflow:hidden;
  transition:background .24s ease,border-color .24s ease;
}
.faq-item.open{background:var(--ink-700);border-color:rgba(43,240,168,.35)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:transparent;border:0;text-align:left;
  font-size:17px;font-weight:650;color:var(--text);line-height:1.6;
}
.faq-q span{flex:1}
.faq-ico{position:relative;width:16px;height:16px;flex:0 0 16px}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;background:var(--neon);border-radius:2px;
  transition:transform .24s ease;
}
.faq-ico::before{left:0;top:7px;width:16px;height:2px}
.faq-ico::after{left:7px;top:0;width:2px;height:16px}
.faq-item.open .faq-ico::after{transform:scaleY(0)}
.faq-a{position:relative;max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{
  margin:0;padding:0 24px 22px 28px;font-size:15px;line-height:1.9;color:var(--muted);
}
.faq-item.open .faq-a::before{
  content:"";position:absolute;left:12px;top:2px;bottom:22px;width:2px;
  background:var(--grad);border-radius:2px;
}

/* ============ 底部两列宽卡 ============ */
.wide-card{display:flex;flex-direction:column;height:100%}
.wide-cover{width:100%;aspect-ratio:16/9;object-fit:cover;opacity:.92}
.wide-body{padding:26px 26px 28px;display:flex;flex-direction:column;gap:14px;flex:1}
.link-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:auto}
.link-chip{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--muted);
  border:1px solid var(--line);border-radius:var(--r-sm);padding:10px 14px;transition:.2s ease;
}
.link-chip:hover{color:var(--neon);border-color:rgba(43,240,168,.45);background:rgba(43,240,168,.06);transform:translateY(-2px)}
.contact-line{display:flex;align-items:flex-start;gap:10px;font-size:14.5px;color:var(--muted)}
.contact-line i{color:var(--neon);margin-top:6px;font-size:13px}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  background:var(--ink-800);border:1px solid var(--line);
  padding:40px 38px;display:flex;align-items:center;justify-content:space-between;gap:28px;
  box-shadow:var(--shadow-card);
}
.cta-band::before{content:"";position:absolute;top:0;left:0;bottom:0;width:3px;background:var(--grad)}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex-shrink:0}

/* ============ 页脚 ============ */
.site-footer{position:relative;border-top:1px solid var(--line);padding:64px 0 24px;background:var(--ink-900)}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:var(--grad)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:32px}
.footer-col h4{font-size:15px;color:var(--neon);font-weight:650;margin-bottom:16px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-col a.footer-link,.footer-col p.footer-link{
  display:block;font-size:14px;color:var(--muted);margin-bottom:10px;
  transition:color .2s ease,transform .2s ease;
}
.footer-col a.footer-link:hover{color:var(--text);transform:translateX(2px)}
.social-row{display:flex;gap:10px;margin-top:16px}
.social-box{
  width:38px;height:38px;border-radius:12px;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--muted);transition:.22s ease;
}
.social-box:hover{color:var(--neon);border-color:rgba(43,240,168,.45);background:rgba(43,240,168,.07)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}
.footer-bottom .dots{display:inline-flex;align-items:center;gap:10px;flex-wrap:wrap}
.link-more{color:var(--muted);transition:color .2s ease}
.link-more:hover{color:var(--neon);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav-menu{display:none}
  .header-cta{display:none}
  .nav-toggle{display:grid}
  .section{padding:72px 0}
  .hero{padding:56px 0 54px}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .faq-aside{position:static}
  .split{grid-template-columns:1fr;gap:28px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band{flex-direction:column;align-items:flex-start}
}
@media (max-width:767px){
  .container{padding:0 20px}
  body{font-size:15.5px}
  .section{padding:56px 0}
  .hero{padding:44px 0 46px;max-height:78vh}
  .hero-title{font-size:clamp(26px,7vw,34px)}
  .grid-4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .card-pad{padding:22px 20px}
  .faq-q{font-size:16px;padding:18px}
  .faq-a p{padding:0 20px 20px 26px}
  .cta-band{padding:30px 22px}
  .btn{width:100%}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .search-bar{flex-wrap:wrap;border-radius:20px;padding:14px;gap:8px}
  .search-bar input{width:100%;padding:8px 0}
  .search-bar .btn{border-radius:14px;width:100%}
  .chip-row{gap:8px}
}