/* roulang page: index */
/* ===== Design tokens ===== */
:root {
  --bg-page: #0a0e1a;
  --bg-section: #0d1424;
  --bg-card: #111c30;
  --bg-card-deep: #101a2e;
  --bg-soft: #0a101d;
  --border-card: #1e293b;
  --border-light: #2e3d55;
  --border-active: #22d3ee;
  --primary: #22d3ee;
  --primary-dark: #38bdf8;
  --accent: #fb923c;
  --success: #34d399;
  --text-main: #f2f6fc;
  --text-sub: #aab8cc;
  --text-weak: #64748b;
  --btn-deep: #0b1120;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-normal: 0 2px 12px rgba(0,0,0,.22);
  --shadow-hover: 0 10px 32px rgba(0,0,0,.38);
  --transition: .25s ease;
  --container-max: 1232px;
  --header-height: 72px;
  --section-space: 80px;
}

/* ===== Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Helvetica Neue",sans-serif;
  background:var(--bg-page);
  color:var(--text-main);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001s!important;transition-duration:.001s!important}
}
body.no-scroll{overflow:hidden}
a{color:inherit;text-decoration:none;transition:color var(--transition),border-color var(--transition),background var(--transition),transform var(--transition),box-shadow var(--transition)}
img{max-width:100%;display:block;height:auto}
button,input,select,textarea{font-family:inherit;font-size:1rem;border:0}
button{cursor:pointer;background:none;color:inherit}
:focus{outline:2px solid rgba(34,211,238,.75);outline-offset:3px;border-radius:4px}
::selection{background:rgba(34,211,238,.28);color:#fff}

.container{max-width:var(--container-max);margin-left:auto;margin-right:auto;padding-left:20px;padding-right:20px}
.grid-container{padding-left:20px;padding-right:20px;max-width:var(--container-max)}

/* ===== Common section ===== */
.section{padding-top:var(--section-space);padding-bottom:var(--section-space)}
.section-alt{background:var(--bg-section)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-size:13px;letter-spacing:.16em;font-weight:600;margin-bottom:10px}
.section-head .eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px}
.section-head h2{font-size:26px;font-weight:700;line-height:1.4;margin:0}
.section-head .desc{color:var(--text-sub);font-size:15px;margin-top:8px;max-width:620px}
.section-sub{color:var(--text-sub);font-size:15px;max-width:720px}
.text-link{display:inline-flex;align-items:center;gap:8px;color:var(--text-sub);font-size:14px;font-weight:600;white-space:nowrap}
.text-link i{transition:transform var(--transition)}
.text-link:hover{color:var(--primary)}
.text-link:hover i{transform:translateX(4px)}

.button{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 28px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;letter-spacing:.02em;line-height:1;
  transition:background var(--transition),box-shadow var(--transition),transform var(--transition),color var(--transition),border-color var(--transition);
  border:1px solid transparent;white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:var(--btn-deep);box-shadow:0 8px 24px rgba(34,211,238,.18)}
.btn-primary:hover{box-shadow:0 12px 32px rgba(34,211,238,.28);transform:translateY(-2px);color:var(--btn-deep)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 2px 10px rgba(34,211,238,.2)}
.btn-outline{background:rgba(255,255,255,.02);border-color:#2d3b52;color:#dbe4f0}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);background:rgba(34,211,238,.06)}
.btn-light{background:#fff;color:#0b1120;font-weight:700}
.btn-light:hover{background:var(--primary);transform:translateY(-2px)}
.btn-sm{min-height:36px;padding:0 16px;font-size:13px;border-radius:8px}

/* ===== Cards / badges ===== */
.badge{display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-pill);font-size:12px;font-weight:500;line-height:1;padding:5px 11px}
.badge-orange{background:rgba(251,146,60,.15);color:var(--accent);border:1px solid rgba(251,146,60,.35)}
.badge-blue{background:rgba(34,211,238,.12);color:var(--primary);border:1px solid rgba(34,211,238,.35)}
.badge-gray{background:rgba(148,163,184,.12);color:#aab8cc;border:1px solid rgba(148,163,184,.22)}
.badge-hot{background:linear-gradient(90deg,#fb923c,#f97316);color:#fff;font-weight:700;box-shadow:0 4px 12px rgba(251,146,60,.25)}
.badge-new{background:rgba(52,211,153,.14);color:var(--success);border:1px solid rgba(52,211,153,.3)}

.panel-card{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--radius-lg);transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition)}
.panel-card:hover{border-color:var(--border-light);box-shadow:var(--shadow-hover);transform:translateY(-3px)}

/* ===== Header ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(10,14,26,.78);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(30,41,59,.8);
  height:var(--header-height);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;width:100%;height:100%;}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:40px;height:40px;border-radius:12px;
  background:linear-gradient(145deg,#1b2942,#0f1729);
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);border:1px solid var(--border-light);
  box-shadow:inset 0 0 12px rgba(34,211,238,.12);
}
.logo-mark i{font-size:20px}
.logo-text{display:flex;align-items:baseline;gap:2px;font-size:20px;font-weight:700;letter-spacing:.01em;line-height:1.2}
.logo-text .part-brand{color:var(--accent)}
.logo-text .part-login{color:#eef4ff}
.logo-badge{margin-left:6px;display:inline-flex;background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.35);color:var(--primary);font-size:11px;padding:2px 10px;border-radius:999px;font-weight:600}

.main-nav{display:flex;align-items:center;gap:36px;margin:0 24px}
.nav-item{position:relative;color:#aab8cc;font-size:15px;font-weight:500;padding:8px 2px;transition:color var(--transition)}
.nav-item::after{content:"";position:absolute;left:0;bottom:-2px;width:100%;height:2px;border-radius:2px;background:var(--primary);transform:scaleX(0);transform-origin:center;transition:transform .25s cubic-bezier(.4,0,.2,1)}
.nav-item:hover{color:#fff}
.nav-item:hover::after{transform:scaleX(1)}
.nav-item.is-active{color:#fff;font-weight:600}
.nav-item.is-active::after{transform:scaleX(1)}
.header-right{display:flex;align-items:center;gap:16px}
.header-search{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.04);border:1px solid var(--border-card);color:var(--text-sub)}
.header-search:hover{color:var(--primary);border-color:var(--primary);background:rgba(34,211,238,.06)}

/* ===== Mobile bottom tabs ===== */
.bottom-tab{
  position:fixed;bottom:0;left:0;right:0;z-index:70;
  display:flex;align-items:stretch;justify-content:space-around;
  background:rgba(13,20,36,.94);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-top:1px solid var(--border-card);
  height:62px;padding-bottom:env(safe-area-inset-bottom);
}
.bottom-tab a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:#7a8ba3;font-size:11px;font-weight:500;border-top:2px solid transparent;transition:color var(--transition)}
.bottom-tab a i{font-size:19px}
.bottom-tab a:hover{color:#fff}
.bottom-tab a.is-active{color:var(--primary)}
.bottom-tab a:focus-visible{outline-offset:-2px}

/* ===== Hero ===== */
.hero{
  position:relative;
  min-height:clamp(560px, 90vh, 860px);
  display:flex;align-items:center;
  background:#090d17;
  overflow:hidden;
  isolation:isolate;
}
.hero-bg-ref{position:absolute;inset:0;z-index:-2}
.hero-bg-ref img{width:100%;height:100%;object-fit:cover;opacity:.38}
.hero-overlay{position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(9,13,23,.4) 0%,rgba(9,13,23,.72) 52%,rgba(10,14,26,.98) 100%)}
.hero::after{content:"";position:absolute;inset:auto;z-index:-1;width:760px;height:760px;border-radius:50%;right:-260px;top:-260px;background:radial-gradient(circle,rgba(34,211,238,.14),transparent 65%);pointer-events:none}
.hero-content{position:relative;z-index:2;width:100%;padding:110px 0 70px;text-align:center}
.hero-kicker{display:inline-flex;align-items:center;gap:12px;padding:8px 18px;background:rgba(251,146,60,.12);border:1px solid rgba(251,146,60,.4);border-radius:999px;color:var(--accent);font-size:13px;font-weight:600;margin-bottom:22px;letter-spacing:.02em}
.hero-kicker i{font-size:13px}
.hero h1{font-size:clamp(31px,4.8vw,46px);font-weight:800;letter-spacing:.01em;line-height:1.22;margin:0 auto 20px;max-width:21em;color:#fff}
.hero h1 .gradient-text{background:linear-gradient(90deg,#7ee8fa,#22d3ee);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:#22d3ee}
.hero-sub{margin:0 auto;font-size:clamp(15px,1.6vw,18px);color:#b6c2d6;max-width:680px;line-height:1.8}
.hero-tools{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:34px}
.hero-trust{display:flex;justify-content:center;gap:0;flex-wrap:wrap;margin-top:44px;color:#8b9ab2;font-size:13px}
.hero-trust span{display:inline-flex;align-items:center;gap:8px;padding:0 16px}
.hero-trust span + span{border-left:1px solid #273650}
.hero-trust i{color:var(--success)}

/* ===== Quick login cards ===== */
.quick-wrap{margin-top:-28px;position:relative;z-index:5}
.quick-card{
  height:100%;
  background:linear-gradient(180deg,var(--bg-card-deep),#0e1628);
  border:1px solid var(--border-card);
  border-radius:var(--radius-lg);
  padding:24px 22px;
  transition:border-color .25s,box-shadow .25s,transform .25s;
  display:flex;flex-direction:column;
  gap:12px;
}
.quick-card:hover{border-color:var(--primary);box-shadow:var(--shadow-hover);transform:translateY(-6px)}
.quick-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;background:rgba(34,211,238,.1);color:var(--primary);transition:all var(--transition)}
.quick-card:nth-child(even) .quick-icon{background:rgba(251,146,60,.1);color:var(--accent)}
.quick-card:hover .quick-icon{background:var(--accent);color:#fff}
.quick-card h3{font-size:16px;font-weight:700;color:#f5f8ff;margin:6px 0 0}
.quick-card p{font-size:13px;color:#8ea1bb;line-height:1.65;margin:0}
.quick-go{margin-top:auto;padding-top:6px;display:inline-flex;align-items:center;gap:7px;color:var(--text-weak);font-size:13px;font-weight:600}
.quick-card:hover .quick-go{color:var(--primary)}

/* ===== Pills ===== */
.pill-tabs{display:flex;flex-wrap:wrap;gap:10px}
.pill{display:inline-flex;align-items:center;padding:7px 18px;border-radius:999px;background:rgba(148,163,184,.06);border:1px solid var(--border-card);color:#aab8cc;font-size:13px;font-weight:500;cursor:pointer;transition:all var(--transition)}
.pill:hover{border-color:var(--primary);color:var(--primary)}
.pill.is-active,.pill.active{background:linear-gradient(90deg,#22d3ee,#38bdf8);color:#0b1120;font-weight:600;border-color:transparent}

/* ===== Rank cards ===== */
.rank-item{
  background:var(--bg-card);
  border:1px solid var(--border-card);
  border-radius:var(--radius-md);
  padding:16px;
  display:flex;align-items:center;gap:14px;height:100%;
  transition:border-color var(--transition),box-shadow var(--transition),background var(--transition);
  position:relative;overflow:hidden;
}
.rank-item:hover{border-color:var(--primary);box-shadow:var(--shadow-hover);background:var(--bg-card-deep)}
.rank-no{width:32px;height:32px;flex:0 0 32px;display:flex;align-items:center;justify-content:center;border-radius:10px;background:rgba(148,163,184,.1);font-family:"JetBrains Mono",monospace;font-size:14px;font-weight:700;color:var(--text-sub)}
.rank-item.top-three .rank-no{background:rgba(251,146,60,.14);color:var(--accent)}
.rank-cover{width:58px;height:58px;flex:0 0 58px;border-radius:12px;overflow:hidden;border:1px solid var(--border-card)}
.rank-cover img,.rank-cover picture{width:100%;height:100%;object-fit:cover}
.rank-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.rank-name{font-size:16px;font-weight:600;color:#eef4ff;white-space:normal;font-weight:700}
.rank-tags{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin-top:2px}
.rank-tag{display:inline-flex;align-items:center;gap:4px;font-size:12px;color:#7f91ab;line-height:1}
.rank-tag i{font-size:12px;opacity:.8}
.rank-right{display:flex;flex-direction:column;align-items:flex-end;gap:6px;flex-shrink:0}
.rank-heat{font-size:12px;color:var(--text-weak);font-family:"JetBrains Mono",monospace}
.rank-link{font-size:13px;font-weight:600;color:var(--primary);background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.2);padding:6px 14px;border-radius:8px;transition:all var(--transition)}
.rank-link:hover{background:var(--primary);color:#0b1120;border-color:var(--primary)}

/* ===== News / info section ===== */
.device-card{height:100%;background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--radius-lg);overflow:hidden;transition:border-color var(--transition),box-shadow var(--transition),transform var(--transition);display:flex;flex-direction:column}
.device-card:hover{border-color:#344c66;box-shadow:var(--shadow-hover)}
.device-cover{position:relative;aspect-ratio:16/10;overflow:hidden;background:#0b1220}
.device-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.device-card:hover .device-cover img{transform:scale(1.03)}
.device-cover .badge{position:absolute;left:14px;top:14px;z-index:2}
.device-body{display:flex;flex-direction:column;gap:12px;padding:18px 18px 20px;flex:1}
.device-title{font-size:17px;font-weight:700;line-height:1.5;color:#f2f6fc;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.device-meta{display:flex;align-items:center;gap:6px;margin-top:auto;color:#66788f;font-size:12px;flex-wrap:wrap}
.device-meta .dot{width:3px;height:3px;border-radius:50%;background:#3a4a63;display:inline-block}
.device-meta i{margin-right:2px}

.info-row{display:flex;align-items:flex-start;gap:15px;padding:16px 2px;border-bottom:1px solid #131f34;transition:background var(--transition)}
.info-row:last-child{border-bottom:0}
.info-row:hover{background:rgba(255,255,255,.015)}
.info-thumb{position:relative;width:84px;height:64px;flex:0 0 84px;border-radius:9px;overflow:hidden;background:#0b1220}
.info-thumb img{width:100%;height:100%;object-fit:cover}
.info-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:4px}
.info-title{font-size:15px;font-weight:600;color:#e9eff8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.5}
.info-row:hover .info-title{color:var(--primary)}
.info-abstract{font-size:13px;color:#7f8da5;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;line-height:1.6}
.info-foot{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap;margin-top:3px}
.info-meta{display:flex;align-items:center;gap:10px;color:#5e6f87;font-size:12px}
.info-more{font-size:12px;color:#22d3ee;opacity:0;transform:translateX(-4px);transition:all var(--transition)}
.info-row:hover .info-more{opacity:1;transform:translateX(0)}
.news-empty{border:1px dashed #25334d;border-radius:var(--radius-lg);padding:48px 24px;text-align:center;background:rgba(17,28,48,.45)}
.news-empty .empty-icon{width:72px;height:72px;margin:0 auto 18px;border-radius:50%;background:rgba(34,211,238,.07);display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:28px}
.news-empty h3{font-size:18px;color:#dbe4f0;font-weight:600;margin-bottom:8px}
.news-empty p{color:#64748b;font-size:14px}

/* ===== Voice ===== */
.voice-card{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--radius-lg);padding:24px;height:100%;display:flex;flex-direction:column;transition:all var(--transition)}
.voice-card:hover{border-color:var(--primary);transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.voice-star{display:flex;gap:3px;color:var(--accent)}
.voice-star i{font-size:13px}
.voice-text{margin:14px 0 20px;font-size:15px;color:#cbd5e1;line-height:1.85;flex:1}
.voice-user{display:flex;align-items:center;gap:10px}
.voice-avatar{width:38px;height:38px;border-radius:50%;background:rgba(34,211,238,.15);display:flex;align-items:center;justify-content:center;color:var(--primary);font-weight:700;font-size:14px}
.voice-name{font-size:13px;color:#8b9ab0;font-weight:500}
.voice-tag{font-size:11px;color:#5e6f87}

/* ===== Feature / guarantee ===== */
.feature-card{display:flex;gap:14px;padding:18px;border-radius:12px;background:rgba(16,26,46,.7);border:1px solid #18263d;transition:all var(--transition);height:100%;align-items:flex-start}
.feature-card:hover{border-color:#2c4c6d;background:#0e1628}
.feature-icon{flex:0 0 42px;width:42px;height:42px;display:flex;align-items:center;justify-content:center;border-radius:11px;font-size:18px;color:var(--accent);background:rgba(251,146,60,.1)}
.feature-card:nth-child(4n+1) .feature-icon{color:var(--primary);background:rgba(34,211,238,.08)}
.feature-card h3{font-size:16px;font-weight:700;color:#f3f6fb;margin-bottom:7px}
.feature-card p{font-size:13px;color:#8394ac;line-height:1.7;margin:0}

/* ===== FAQ ===== */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{border:1px solid var(--border-card);background:var(--bg-card-deep);border-radius:12px;margin-bottom:12px;overflow:hidden;transition:border-color var(--transition),box-shadow var(--transition)}
.faq-item:hover{border-color:#344867}
.faq-item[open]{border-color:var(--primary);box-shadow:0 10px 28px rgba(0,0,0,.25)}
.faq-summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:17px 22px;font-weight:600;color:#dbe6f5;font-size:16px;cursor:pointer;transition:color var(--transition)}
.faq-summary::-webkit-details-marker{display:none}
.faq-summary:hover{color:var(--primary)}
.faq-summary .icon-arrow{flex:0 0 28px;width:28px;height:28px;border:1px solid var(--border-card);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:13px;transition:transform var(--transition),background var(--transition),color var(--transition)}
.faq-item[open] .icon-arrow{transform:rotate(180deg);background:var(--primary);color:#0b1120;border-color:var(--primary)}
.faq-answer{padding:0 22px 20px;color:#a2b1c7;font-size:14px;line-height:1.8;border-top:1px dashed #253249;margin:0 22px 0;padding:14px 0 20px}

/* ===== CTA panel ===== */
.cta-panel{position:relative;background:linear-gradient(145deg,#132142,#0d1424);border:1px solid #263d5c;border-radius:24px;padding:56px 24px;text-align:center;overflow:hidden}
.cta-panel::before{content:"";position:absolute;width:300px;height:300px;left:5%;top:-90px;border-radius:50%;background:rgba(34,211,238,.12);filter:blur(70px)}
.cta-panel::after{content:"";position:absolute;width:260px;height:260px;right:5%;bottom:-100px;border-radius:50%;background:rgba(251,146,60,.1);filter:blur(70px)}
.cta-innder{position:relative;z-index:2}
.cta-panel h2{font-size:28px;font-weight:800;margin-bottom:12px}
.cta-panel p{color:#aab8cc;margin-bottom:24px;font-size:15px}
.cta-panel .cta-btns{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.cta-note{color:#66788f;font-size:13px;margin-top:16px}

/* ===== Footer ===== */
.site-footer{background:#070b13;border-top:1px solid #141e30;padding-top:58px;margin-top:40px}
.footer-brand p{font-size:13px;color:#71849f;margin-top:18px;line-height:1.8;max-width:300px}
.footer-title{font-size:15px;font-weight:600;color:#dbeafd;margin-bottom:20px;display:flex;align-items:center;gap:8px}
.footer-title::before{content:"";width:14px;height:2px;background:var(--primary);border-radius:2px}
.footer-link{display:flex;flex-direction:column;gap:10px;list-style:none;margin:0}
.footer-link a{font-size:13px;color:#71849f;transition:color .25s,transform .25s;display:inline-flex;align-items:center;gap:5px}
.footer-link a i{font-size:9px}
.footer-link a:hover{color:var(--primary);transform:translateX(4px)}
.footer-bottom{margin-top:48px;border-top:1px solid #131e30;padding:22px 0;font-size:13px;color:#465a75;text-align:center;line-height:1.9}
.footer-bottom a{color:#7a8da6}
.footer-bottom a:hover{color:var(--primary)}

/* ===== Responsive breakpoints ===== */
@media screen and (min-width:641px){
  .bottom-tab{display:none}
}
@media screen and (max-width:1024px){
  :root{--section-space:64px}
  .main-nav{gap:18px}
  .bottom-tab{display:flex}
  .site-header{display:none}
  body{padding-bottom:62px}
  .logo-block{padding-left:0}
  .section-head h2{font-size:23px}
  .rank-name{font-size:15px}
  .grid-x > .large-4{padding-top:10px;padding-bottom:10px}
}
@media screen and (max-width:640px){
  :root{--section-space:48px;--header-height:60px}
  .container,.grid-container{padding-left:16px;padding-right:16px}
  .section-head{margin-bottom:24px}
  .section-head h2{font-size:22px}
  .hero-content{padding-top:80px;padding-bottom:40px;text-align:center}
  .hero h1{font-size:28px;line-height:1.4}
  .hero-sub{font-size:14px;line-height:1.8}
  .hero-trust span + span{border-left:0}
  .hero-trust{flex-direction:column;align-items:center;gap:4px}
  .quick-card{padding:20px}
  .rank-item{gap:10px;padding:12px}
  .rank-cover{width:48px;height:48px;flex-basis:48px;border-radius:10px}
  .rank-name{font-size:14px;line-height:1.4}
  .rank-no{width:26px;height:26px;flex-basis:26px;font-size:12px}
  .rank-right{gap:4px}
  .rank-heat{font-size:10px}
  .device-title{font-size:16px}
  .info-row{gap:10px}
  .info-thumb{width:70px;height:58px;flex-basis:70px}
  .info-title{font-size:14px;-webkit-line-clamp:2}
  .feature-card{padding:15px}
  .faq-summary{padding:15px 16px}
  .faq-answer{padding:12px 0 18px;font-size:13px}
  .cta-panel{padding:40px 16px}
  .cta-panel h2{font-size:22px}
  .footer-brand p{max-width:100%}
  .footer-link{flex-direction:row;flex-wrap:wrap;gap:14px}
}

/* roulang page: category1 */
:root {
  --bg: #0a0e1a;
  --bg-alt: #0d1424;
  --card-bg: #111c30;
  --card-border: #1e2a3d;
  --line-light: #1c2740;
  --cyan: #22d3ee;
  --cyan-mid: #38bdf8;
  --orange: #fb923c;
  --mint: #34d399;
  --text-strong: #f2f6fc;
  --text-body: #dbe6f5;
  --text-sub: #aab8cc;
  --text-muted: #71849f;
  --radius-large: 16px;
  --radius-medium: 12px;
  --radius-small: 10px;
  --shadow-hover: 0 8px 30px rgba(0,0,0,.35);
  --transition: .25s cubic-bezier(.4,0,.2,1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-body);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--cyan);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: #fff;
}

img {
  display: block;
  max-width: 100%;
}

button,
input,
select,
textarea {
  font: inherit;
}

.grid-container {
  max-width: 1200px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(10, 14, 26, .9);
  border-bottom: 1px solid var(--line-light);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-strong);
  letter-spacing: .5px;
  white-space: nowrap;
}

.logo:hover {
  color: var(--text-strong);
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(34,211,238,.28), rgba(34,211,238,.08));
  border: 1px solid rgba(34,211,238,.45);
  color: var(--cyan);
  font-size: 18px;
}

.part-brand {
  color: var(--orange);
}

.part-login {
  color: #f2f6fc;
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  font-weight: 500;
  line-height: 1;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid rgba(251,146,60,.45);
  color: var(--orange);
  background: rgba(251,146,60,.1);
  margin-left: 4px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-item {
  display: inline-flex;
  align-items: center;
  height: 56px;
  padding: 0 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  border-radius: 10px;
  position: relative;
  transition: var(--transition);
}

.nav-item::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 12px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  opacity: 0;
  transform: scaleX(.3);
  transition: var(--transition);
}

.nav-item:hover {
  color: #fff;
  background: rgba(34,211,238,.05);
}

.nav-item.is-active {
  color: #fff;
  font-weight: 600;
}

.nav-item.is-active::after {
  opacity: 1;
  transform: scaleX(1);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-search {
  width: 40px;
  height: 40px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--text-sub);
  font-size: 16px;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.header-search:hover,
.header-search:focus {
  border-color: rgba(34,211,238,.45);
  color: var(--cyan);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: var(--radius-small);
  background: linear-gradient(135deg, var(--cyan) 0%, var(--cyan-mid) 100%);
  color: #0b1120;
  font-weight: 600;
  padding: 12px 24px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 6px 20px rgba(34,211,238,.12);
}

.btn-primary:hover,
.btn-primary:focus {
  color: #0b1120;
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(34,211,238,.24);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #334867;
  border-radius: var(--radius-small);
  background: rgba(17,28,48,.2);
  color: var(--text-body);
  font-weight: 500;
  padding: 12px 24px;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-outline:hover,
.btn-outline:focus {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 0 4px rgba(34,211,238,.08);
}

.btn-sm {
  padding: 9px 18px;
  font-size: 14px;
}

.category-hero {
  position: relative;
  padding: 76px 0 64px;
  background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  overflow: hidden;
}

.category-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,14,26,.92) 0%, rgba(10,14,26,.78) 40%, rgba(10,14,26,.96) 100%);
  z-index: 1;
}

.category-hero::after {
  content: "";
  position: absolute;
  width: 520px;
  height: 520px;
  right: -160px;
  bottom: -200px;
  border-radius: 50%;
  background: rgba(34,211,238,.06);
  filter: blur(80px);
  z-index: 1;
}

.category-hero .grid-container {
  position: relative;
  z-index: 2;
}

.hero-breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 26px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.hero-breadcrumb a {
  color: var(--text-sub);
}

.hero-breadcrumb a:hover {
  color: var(--cyan);
}

.hero-breadcrumb .crumb-icon {
  font-size: 11px;
  color: var(--text-muted);
}

.category-hero h1 {
  font-size: 34px;
  line-height: 1.35;
  color: #fff;
  font-weight: 700;
  letter-spacing: .5px;
  margin: 0 0 14px;
}

.category-hero h1 span {
  color: var(--orange);
}

.hero-lead {
  font-size: 18px;
  color: var(--text-body);
  max-width: 640px;
  margin: 0 0 26px;
}

.hero-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid rgba(30,42,61,.7);
  color: var(--text-muted);
  font-size: 13px;
}

.hero-meta-row i {
  color: var(--cyan);
  margin-right: 6px;
  font-size: 12px;
}

.btn-hero-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.section-block {
  padding: 80px 0;
}

.section-block.alt {
  background: var(--bg-alt);
}

.section-head {
  margin-bottom: 42px;
}

.section-head .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.section-head .eyebrow::before {
  content: "";
  width: 30px;
  height: 3px;
  border-radius: 3px;
  background: var(--orange);
}

.section-head h2 {
  margin: 0 0 8px;
  font-size: 26px;
  line-height: 1.45;
  color: #fff;
  font-weight: 600;
}

.section-head p {
  max-width: 720px;
  font-size: 15px;
  color: var(--text-sub);
  margin: 0;
}

.channel-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

.channel-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 16px;
  border: 1px solid var(--card-border);
  border-radius: 999px;
  background: rgba(17,28,48,.35);
  color: var(--text-sub);
  font-size: 13px;
  font-weight: 500;
  cursor: default;
  transition: var(--transition);
}

.channel-pill i {
  color: var(--cyan);
  font-size: 13px;
}

.channel-pill.is-on {
  background: rgba(34,211,238,.12);
  border-color: rgba(34,211,238,.42);
  color: var(--cyan);
}

.channel-pill:hover {
  border-color: rgba(34,211,238,.6);
  color: #fff;
  transform: translateY(-1px);
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.overview-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-large);
  padding: 28px 24px;
  transition: var(--transition);
}

.overview-card:hover {
  border-color: #334f68;
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.overview-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  background: rgba(34,211,238,.1);
  border: 1px solid rgba(34,211,238,.2);
  margin-bottom: 18px;
  font-size: 20px;
}

.overview-icon.orange {
  color: var(--orange);
  background: rgba(251,146,60,.1);
  border-color: rgba(251,146,60,.2);
}

.overview-card h3 {
  margin: 0 0 10px;
  font-size: 20px;
  color: #fff;
  font-weight: 600;
}

.overview-card p {
  font-size: 14px;
  color: var(--text-sub);
  margin: 0;
  line-height: 1.75;
}

.corner-tag {
  display: inline-block;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  color: var(--cyan);
  background: rgba(34,211,238,.1);
  border: 1px solid rgba(34,211,238,.2);
}

.corner-tag.orange {
  color: var(--orange);
  background: rgba(251,146,60,.1);
  border-color: rgba(251,146,60,.23);
}

.scene-wrap {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.scene-item {
  display: flex;
  gap: 20px;
  padding: 28px;
  border-radius: var(--radius-large);
  background: rgba(13,20,36,.6);
  border: 1px solid var(--card-border);
  transition: var(--transition);
}

.scene-item:hover {
  border-color: rgba(34,211,238,.35);
  box-shadow: var(--shadow-hover);
}

.scene-icon {
  flex: 0 0 46px;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background: rgba(251,146,60,.12);
  border: 1px solid rgba(251,146,60,.26);
  color: var(--orange);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.scene-item h3 {
  font-size: 18px;
  margin: 0 0 6px;
  color: #fff;
  font-weight: 600;
}

.scene-item p {
  font-size: 14px;
  color: var(--text-sub);
  margin: 0;
}

.split-module {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 38px;
  align-items: center;
}

.split-info h3 {
  font-size: 22px;
  margin: 0 0 18px;
  color: #fff;
  line-height: 1.5;
}

.split-info p {
  font-size: 15px;
  color: var(--text-sub);
  margin: 0 0 22px;
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 0 0 26px;
}

.check-list li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 12px;
  color: var(--text-body);
  font-size: 15px;
}

.check-list li i {
  position: absolute;
  left: 0;
  top: 5px;
  color: var(--mint);
  font-size: 14px;
}

.figure-visual {
  border-radius: var(--radius-large);
  overflow: hidden;
  border: 1px solid var(--card-border);
  background: var(--bg-alt);
}

.figure-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 320px;
}

.guide-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 22px;
}

.guide-step {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-large);
  padding: 28px 22px;
  text-align: center;
  transition: var(--transition);
}

.guide-step:hover {
  border-color: rgba(251,146,60,.35);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.guide-step .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(34,211,238,.12);
  border: 1px solid rgba(34,211,238,.35);
  color: var(--cyan);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
}

.guide-step h3 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 8px;
  font-weight: 600;
}

.guide-step p {
  font-size: 13px;
  color: var(--text-sub);
  margin: 0;
  line-height: 1.6;
}

.guide-step .arrow-mark {
  position: absolute;
  right: -14px;
  top: 52px;
  color: rgba(34,211,238,.6);
  font-size: 16px;
  z-index: 2;
}

.stat-band {
  border-radius: var(--radius-large);
  background: rgba(17,28,48,.65);
  border: 1px solid var(--card-border);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding: 26px 12px;
}

.stat-item {
  text-align: center;
  padding: 14px 10px;
}

.stat-value {
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  line-height: 1.4;
}

.stat-value i {
  font-style: normal;
}

.stat-item p {
  margin: 0;
  font-size: 13px;
  color: var(--text-muted);
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.accordion-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-medium);
  overflow: hidden;
  transition: var(--transition);
}

.accordion-item.is-open {
  border-color: rgba(34,211,238,.35);
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 22px;
  background: transparent;
  border: 0;
  color: #fff;
  font-size: 16px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  gap: 16px;
}

.accordion-header:hover,
.accordion-header:focus {
  color: var(--cyan);
}

.accordion-header i {
  color: var(--cyan);
  font-size: 14px;
  flex: 0 0 auto;
  transition: var(--transition);
}

.accordion-item.is-open .accordion-header i {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}

.accordion-content-inner {
  padding: 0 22px 20px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.85;
}

.accordion-item.is-open .accordion-content {
  max-height: 360px;
}

.cta-panel {
  background: radial-gradient(circle at 85% 20%, rgba(34,211,238,.12), transparent 45%), var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 18px;
  padding: 54px 30px;
  text-align: center;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0,0,0,.2);
}

.cta-panel h2 {
  font-size: 26px;
  color: #fff;
  margin: 0 0 10px;
  font-weight: 600;
}

.cta-panel p {
  color: var(--text-sub);
  font-size: 15px;
  margin: 0 0 28px;
}

.cta-note {
  margin-top: 18px;
  font-size: 13px;
  color: var(--text-muted);
}

.disclaimer-line {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  padding: 22px 0 4px;
}

.site-footer {
  margin-top: 0;
  background: #070b14;
  border-top: 1px solid #1a2335;
  padding-top: 64px;
}

.footer-brand-p {
  color: #7d8ea6;
  font-size: 14px;
  line-height: 1.9;
  margin-top: 16px;
  max-width: 360px;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #e6edf7;
  margin-bottom: 18px;
  letter-spacing: .5px;
}

.footer-link {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-link li {
  margin-bottom: 11px;
}

.footer-link a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14px;
  color: #7d8ea6;
}

.footer-link a i {
  font-size: 10px;
  color: #526179;
}

.footer-link a:hover {
  color: var(--cyan);
}

.badge-gray {
  display: inline-flex;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 12px;
  color: #8fa0b8;
  border: 1px solid #293a53;
  background: rgba(255,255,255,.025);
}

.footer-bottom {
  border-top: 1px solid #0f1729;
  padding: 22px 0;
  margin-top: 40px;
  text-align: center;
  color: #5e6e84;
  font-size: 13px;
}

.footer-bottom a {
  color: #8197b1;
  border-bottom: 1px dotted rgba(129,151,177,.5);
}

.footer-bottom a:hover {
  color: var(--cyan);
}

.mobile-bottom-tab {
  display: none;
}

.mobile-bottom-tab .tab-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  flex: 1;
  height: 56px;
  border-radius: 12px;
  margin: 0 4px;
  font-size: 11px;
  color: var(--text-muted);
  background: transparent;
}

.mobile-bottom-tab .tab-link i {
  font-size: 19px;
}

.mobile-bottom-tab .tab-link.is-active {
  color: var(--cyan);
  background: rgba(34,211,238,.08);
}

.mobile-bottom-tab .tab-link:hover {
  color: #fff;
}

.card-list-tile {
  display: grid;
  grid-template-columns: 190px 1fr;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-large);
  background: var(--card-bg);
  overflow: hidden;
  transition: var(--transition);
}

.card-list-tile:hover {
  border-color: rgba(34,211,238,.3);
  transform: translateY(-2px);
}

.card-list-tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 170px;
}

.tile-body {
  padding: 24px;
}

.tile-body .tag-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.tag-mini {
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 999px;
  color: var(--cyan);
  background: rgba(34,211,238,.1);
  border: 1px solid rgba(34,211,238,.2);
}

.tag-mini.orange {
  color: var(--orange);
  background: rgba(251,146,60,.1);
  border-color: rgba(251,146,60,.25);
}

.tile-body h3 {
  font-size: 18px;
  margin: 0 0 10px;
  color: #fff;
  line-height: 1.5;
  font-weight: 600;
}

.tile-body p {
  font-size: 14px;
  color: var(--text-sub);
  margin: 0 0 16px;
}

.tile-foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.split-bottom {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 28px;
}

.note-mini {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--orange);
  font-size: 13px;
}

@media (max-width: 1200px) {
  .grid-container {
    padding-left: 18px;
    padding-right: 18px;
    max-width: 100%;
  }
}

@media (max-width: 1024px) {
  .category-hero {
    padding: 60px 0 48px;
  }

  .section-block {
    padding: 56px 0;
  }

  .overview-grid {
    gap: 18px;
  }
}

@media (max-width: 820px) {
  .overview-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .scene-wrap {
    grid-template-columns: 1fr;
  }

  .split-module {
    grid-template-columns: 1fr;
  }

  .guide-flow {
    grid-template-columns: repeat(2, 1fr);
  }

  .guide-step .arrow-mark {
    display: none;
  }

  .split-bottom {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  body {
    padding-bottom: 64px;
    font-size: 15px;
    line-height: 1.7;
  }

  .site-header {
    display: none;
  }

  .category-hero {
    padding: 48px 0 40px;
  }

  .category-hero h1 {
    font-size: 28px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .section-block {
    padding: 44px 0;
  }

  .section-head {
    margin-bottom: 28px;
  }

  .section-head h2 {
    font-size: 22px;
  }

  .section-head p {
    font-size: 14px;
  }

  .overview-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .overview-card {
    padding: 22px 20px;
  }

  .stat-band {
    grid-template-columns: repeat(2, 1fr);
    padding: 16px 10px;
    gap: 10px;
  }

  .stat-value {
    font-size: 22px;
  }

  .guide-flow {
    grid-template-columns: 1fr;
  }

  .card-list-tile {
    grid-template-columns: 1fr;
  }

  .card-list-tile img {
    min-height: 0;
    height: 200px;
  }

  .mobile-bottom-tab {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 80;
    height: 62px;
    padding: 4px 6px calc(6px + env(safe-area-inset-bottom));
    background: rgba(9,13,24,.95);
    border-top: 1px solid #1c2740;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }

  .accordion-header {
    font-size: 15px;
    padding: 17px 18px;
  }

  .accordion-content-inner {
    padding: 0 18px 18px;
  }

  .cta-panel {
    padding: 40px 18px;
  }

  .cta-panel h2 {
    font-size: 22px;
  }

  .btn-hero-group .btn-primary,
  .btn-hero-group .btn-outline {
    padding: 11px 20px;
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* roulang page: article */
:root {
  --bg-page: #0a0e1a;
  --bg-section: #0d1424;
  --bg-card: #111c30;
  --bg-elevated: #16233c;
  --bg-input: #0a101d;
  --primary: #22d3ee;
  --primary-bright: #4cc9f0;
  --accent: #fb923c;
  --success: #34d399;
  --danger: #f87171;
  --text-strong: #f2f6fc;
  --text-main: #dbe6f5;
  --text-sub: #aab8cc;
  --text-weak: #64748b;
  --border: #1e293b;
  --border-light: #2d3b52;
  --radius-xl: 18px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-cta: 0 6px 20px rgba(34, 211, 238, 0.25);
  --nav-height: 72px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  background: var(--bg-page);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-bright); }
button { font-family: inherit; cursor: pointer; }
ul, ol { padding-left: 1.25em; }
h1, h2, h3, h4, h5, h6 {
  color: var(--text-strong);
  line-height: 1.4;
  margin-top: 0;
}
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 9999;
  background: var(--primary);
  color: #0b1120;
  padding: 10px 18px;
  border-radius: 0 0 10px 0;
  font-weight: 700;
}
.skip-link:focus { left: 0; color: #0b1120; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  min-height: var(--nav-height);
  gap: 16px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 18px;
  color: #0b1120;
  background: linear-gradient(135deg, #22d3ee, #4cc9f0);
  box-shadow: 0 0 0 1px rgba(255,255,255,.08);
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .3px;
  white-space: nowrap;
}
.part-brand { color: var(--accent); }
.part-login { color: #f2f6fc; }
.logo-badge {
  font-size: .68rem;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(34, 211, 238, .12);
  border: 1px solid rgba(34, 211, 238, .35);
  color: var(--primary);
  letter-spacing: .4px;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  gap: 30px;
  max-width: 620px;
  justify-content: center;
  margin-left: auto;
  margin-right: auto;
}
.nav-item {
  color: var(--text-sub);
  font-size: .95rem;
  font-weight: 500;
  padding: 6px 2px;
  position: relative;
  text-decoration: none;
  transition: color .2s;
}
.nav-item::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 2px;
  width: 0;
  background: var(--primary);
  border-radius: 4px;
  transition: width .25s ease;
}
.nav-item:hover,
.nav-item.is-active { color: #fff; }
.nav-item.is-active::after,
.nav-item:hover::after { width: 100%; }
.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
}
.header-search {
  height: 38px;
  width: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-section);
  color: #cbd5e1;
  font-size: 14px;
  transition: all .2s;
}
.header-search:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--bg-elevated);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: linear-gradient(135deg, #22d3ee, #38bdf8);
  color: #0b1120;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-size: .9rem;
  font-weight: 700;
  font-family: inherit;
  line-height: 1.2;
  text-decoration: none;
  letter-spacing: .3px;
  transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
}
.btn-primary:hover {
  color: #0b1120;
  filter: brightness(1.05);
  transform: translateY(-2px);
  box-shadow: var(--shadow-cta);
}
.btn-primary:active { transform: translateY(0); box-shadow: none; }
.btn-primary.btn-sm { padding: 8px 18px; font-size: .85rem; }
.btn-block { width: 100%; }
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: #cbd5e1;
  border: 1px solid #2d3b52;
  border-radius: var(--radius-sm);
  padding: 11px 24px;
  font-size: .9rem;
  font-weight: 500;
  line-height: 1.2;
  transition: all .2s;
}
.btn-outline:hover {
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-1px);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: .75rem;
  font-weight: 500;
  padding: 3px 12px;
  border-radius: 999px;
  line-height: 1.5;
}
.badge-gray {
  background: rgba(100,116,139,.15);
  border: 1px solid rgba(100,116,139,.3);
  color: #94a3b8;
}

.article-hero {
  background:
    linear-gradient(100deg, rgba(10, 14, 26, .95) 30%, rgba(13, 20, 36, .75) 100%),
    url(/assets/images/backpic/back-1.webp) center / cover no-repeat;
  padding: 20px 0;
  border-bottom: 1px solid #18233a;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .82rem;
  color: var(--text-sub);
}
.breadcrumb a { color: var(--text-sub); text-decoration: none; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb i { font-size: .7rem; color: #516078; }
.breadcrumb .current {
  color: #cbd5e1;
  max-width: 480px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-layout {
  padding: 40px 0 90px;
}
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 38px 40px 34px;
  box-shadow: 0 4px 16px rgba(0,0,0,.18);
}
.article-cat {
  display: inline-block;
  background: rgba(34,211,238,.12);
  color: var(--primary);
  border: 1px solid rgba(34,211,238,.3);
  font-size: .78rem;
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
  letter-spacing: .3px;
}
.article-h1 {
  font-size: 30px;
  line-height: 1.45;
  font-weight: 700;
  margin-bottom: 12px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: #8597ae;
  font-size: .82rem;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid #1c2740;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-item i { color: #52617a; font-size: .85rem; }
.article-cover {
  overflow: hidden;
  border-radius: var(--radius-lg);
  margin-bottom: 26px;
  border: 1px solid rgba(255,255,255,.04);
}
.article-cover img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 8.2;
  object-fit: cover;
}

.article-content {
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-main);
  max-width: 720px;
}
.article-content p {
  margin: 0 0 22px;
  color: #cfdbe9;
}
.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  margin: 36px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  border-radius: 2px;
}
.article-content h3 {
  font-size: 20px;
  font-weight: 700;
  color: #e7edf7;
  margin: 30px 0 12px;
}
.article-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: #d7e1ef;
  margin: 24px 0 10px;
}
.article-content img {
  border-radius: var(--radius-md);
  margin: 22px auto;
  max-width: 100%;
  height: auto;
}
.article-content ul,
.article-content ol {
  margin: 0 0 22px;
  color: #cdd9e8;
}
.article-content li { margin-bottom: 8px; }
.article-content blockquote {
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 4px solid var(--primary);
  background: #0e1d33;
  border-radius: 0 12px 12px 0;
  color: #b5c8de;
}
.article-content a {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 22px;
  font-size: .92rem;
}
.article-content table th,
.article-content table td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.article-content table th { background: #0e1d33; color: #e9effa; }
.article-content code {
  background: #0d1a2b;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 8px;
  color: #a5f3fc;
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: .88em;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
  padding: 20px 0 0;
  border-top: 1px solid #1c2740;
}
.tag-item {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  background: #1a2940;
  border: 1px solid #24375a;
  color: #b7c8e0;
  font-size: .8rem;
}
.tag-item:hover { color: var(--primary); border-color: var(--primary); }

.article-pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid #1c2740;
}
.pager-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #a7b8ce;
  font-size: .9rem;
  padding: 9px 16px;
  border-radius: 10px;
  background: #0d1a2c;
  border: 1px solid #223352;
  transition: all .2s;
}
.pager-link:hover {
  color: #0b1120;
  background: var(--primary);
  border-color: var(--primary);
}
.pager-link i { font-size: .8rem; }

.article-empty {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 80px 40px;
  text-align: center;
}
.article-empty i {
  display: block;
  font-size: 56px;
  color: #354963;
  margin-bottom: 18px;
}
.article-empty .article-h1 { font-size: 26px; margin-bottom: 8px; }
.article-empty a { margin-top: 20px; }

.side-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}
.side-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin: 0 0 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid #1f2d44;
}
.side-title i { color: var(--primary); font-size: .9rem; }
.related-list { list-style: none; margin: 0; padding: 0; }
.related-list li { margin-bottom: 16px; }
.related-list li:last-child { margin-bottom: 0; }
.related-list a {
  display: flex;
  gap: 12px;
  align-items: center;
}
.related-thumb {
  width: 78px;
  height: 56px;
  flex-shrink: 0;
  border-radius: 9px;
  overflow: hidden;
  background: #0d1a2c;
  border: 1px solid rgba(255,255,255,.04);
}
.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.related-info { min-width: 0; }
.related-name {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: #dbe6f5;
  font-size: .85rem;
  line-height: 1.55;
  transition: color .2s;
}
.related-list a:hover .related-name { color: var(--primary); }
.related-time {
  display: block;
  margin-top: 5px;
  color: #5f718a;
  font-size: .75rem;
}
.tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}
.side-tags .tag-item {
  background: #0d1a2c;
  border-color: #1e2e49;
  padding: 6px 13px;
  font-size: .8rem;
}
.side-cta {
  background:
    linear-gradient(150deg, rgba(34,211,238,.09), rgba(251,146,60,.05)),
    var(--bg-card);
  border: 1px solid rgba(34,211,238,.22);
  text-align: center;
}
.side-cta-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  border-radius: 14px;
  background: rgba(34,211,238,.13);
  color: var(--primary);
}
.side-cta h4 {
  font-size: 17px;
  margin-bottom: 8px;
  color: #fff;
}
.side-cta p {
  color: #91a3bc;
  font-size: .84rem;
  margin-bottom: 18px;
}
.side-cta .btn-primary {
  width: 100%;
  padding: 11px 18px;
  font-size: .86rem;
}

.site-footer {
  background: #070b14;
  border-top: 1px solid #1a2335;
  padding: 56px 0 28px;
}
.footer-brand-p {
  color: #7d8ea6;
  font-size: .88rem;
  line-height: 1.8;
  max-width: 340px;
  margin-top: 6px;
}
.footer-title {
  font-size: .92rem;
  font-weight: 700;
  color: #e6edf8;
  margin-bottom: 16px;
}
ul.footer-link {
  list-style: none;
  padding: 0;
  margin: 0;
}
ul.footer-link li { margin-bottom: 10px; }
ul.footer-link li a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #7d8ea6;
  font-size: .84rem;
  transition: all .2s;
}
ul.footer-link li a i {
  color: #3c4c66;
  font-size: .68rem;
  margin-top: 1px;
}
ul.footer-link li a:hover { color: #fff; padding-left: 3px; }
.footer-bottom {
  border-top: 1px solid #141d2b;
  margin-top: 40px;
  padding-top: 24px;
  text-align: center;
  color: #5c6e86;
  font-size: .8rem;
}
.footer-bottom p { margin: 0; line-height: 1.7; }
.footer-bottom a { color: #7394b8; }
.footer-bottom a:hover { color: var(--primary); }
.footer-bottom p:last-child { margin-top: 6px; font-size: .75rem; color: #495a70; }

.mobile-tab-bar {
  display: none;
}
@media screen and (max-width: 639.98px) {
  .mobile-tab-bar {
    display: flex;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1200;
    height: 62px;
    background: #0d1424;
    border-top: 1px solid #1e293b;
    box-shadow: 0 -6px 22px rgba(0,0,0,.35);
  }
  .mobile-tab-bar .tab-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: #64748b;
    font-size: .72rem;
    text-decoration: none;
    transition: color .2s;
  }
  .mobile-tab-bar .tab-item i {
    font-size: 18px;
    line-height: 1;
  }
  .mobile-tab-bar .tab-item.is-active,
  .mobile-tab-bar .tab-item:active { color: var(--primary); }
  .mobile-tab-bar .tab-item.is-active i { text-shadow: 0 0 12px rgba(34,211,238,.4); }
}

@media screen and (max-width: 639.98px) {
  .site-header { display: none; }
  body { padding-bottom: 74px; }
  .article-hero { padding: 16px 0; }
  .breadcrumb { font-size: .76rem; gap: 6px; }
  .article-layout { padding: 24px 0 40px; }
  .article-card { padding: 24px 20px; border-radius: 14px; }
  .article-h1 { font-size: 22px; }
  .article-meta { gap: 10px; margin-bottom: 20px; font-size: .76rem; }
  .article-cover img { aspect-ratio: 16 / 10; }
  .article-content { font-size: 15.5px; line-height: 1.8; }
  .article-content h2 { font-size: 20px; }
  .article-content h3 { font-size: 18px; }
  .article-pager { flex-direction: column; align-items: stretch; }
  .pager-link { justify-content: center; }
  .article-empty { padding: 46px 22px; }
  .article-empty i { font-size: 40px; }
  .side-card { padding: 20px; }
  .site-footer { padding-top: 40px; }
}
@media screen and (min-width: 640px) and (max-width: 1023.98px) {
  .article-card { padding: 30px 28px; }
  .article-layout { padding: 32px 0 68px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}

/* roulang page: category2 */
:root {
  --bg-page: #0a0e1a;
  --bg-section: #0d1424;
  --bg-card: #111c30;
  --bg-elev: #15233b;
  --bg-deep: #070b14;
  --line: #1e2a3d;
  --line-soft: #1c2740;
  --line-bright: #334867;
  --brand: #22d3ee;
  --brand-2: #38bdf8;
  --brand-deep: #0e7490;
  --accent: #fb923c;
  --success: #34d399;
  --danger: #f87171;
  --text-head: #f2f6fc;
  --text-main: #d0dcec;
  --text-sub: #aab8cc;
  --text-weak: #71849f;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.28);
  --font-set: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --mono-set: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font-set);
  font-size: 15px;
  line-height: 1.75;
  background: var(--bg-page);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--brand); text-decoration: none; transition: color .2s ease; }
a:hover { color: #7de3f7; }

h1, h2, h3, h4, h5 { font-weight: 700; color: var(--text-head); line-height: 1.3; margin-top: 0; }
p { margin: 0 0 14px; }

button, input, select, textarea { font-family: inherit; }
button { cursor: pointer; }

:focus-visible {
  outline: 2px solid rgba(34, 211, 238, .7);
  outline-offset: 3px;
  border-radius: 4px;
}

.grid-container { max-width: 1200px; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  background: linear-gradient(135deg, #22d3ee, #38bdf8);
  color: #0b1120;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  box-shadow: 0 4px 18px rgba(34, 211, 238, .18);
  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
}

.btn-primary:hover {
  color: #0b1120;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(34, 211, 238, .26);
  filter: brightness(1.04);
}

.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 10px rgba(34, 211, 238, .18); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: #cdd9e8;
  border: 1px solid #2d3b52;
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  transition: color .2s ease, border-color .2s ease, transform .2s ease, background .2s ease;
}

.btn-secondary:hover {
  color: var(--brand);
  border-color: var(--brand);
  background: rgba(34, 211, 238, .04);
  transform: translateY(-2px);
}

.btn-light {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, .07);
  color: var(--text-head);
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: var(--radius-sm);
  padding: 11px 22px;
  font-size: 14px;
  font-weight: 600;
  transition: all .2s ease;
}

.btn-light:hover {
  background: rgba(255, 255, 255, .12);
  border-color: rgba(255, 255, 255, .3);
  color: #fff;
}

.btn-sm { padding: 9px 18px; font-size: 13px; }

/* ========== 顶部导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(10, 14, 26, .88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: linear-gradient(140deg, #112a52, #0a0e1a);
  border: 1px solid #284059;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  font-size: 20px;
  box-shadow: inset 0 0 12px rgba(34, 211, 238, .15);
}
.logo-text {
  font-size: 20px;
  line-height: 1;
  font-weight: 700;
  letter-spacing: .3px;
}
.part-brand { color: var(--accent); }
.part-login { color: #f2f6fc; }
.logo-badge {
  font-size: 11px;
  color: var(--brand);
  border: 1px solid rgba(34, 211, 238, .5);
  background: rgba(34, 211, 238, .08);
  padding: 2px 8px;
  border-radius: 999px;
  line-height: 1.4;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-item {
  color: var(--text-sub);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 4px 0 8px;
  transition: color .2s;
}
.nav-item:after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .25s ease;
}
.nav-item:hover { color: #fff; }
.nav-item:hover:after { transform: scaleX(.55); }
.nav-item.is-active { color: #fff; font-weight: 600; }
.nav-item.is-active:after { transform: scaleX(1); }

.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
}
.header-search {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid transparent;
  color: var(--text-sub);
  transition: all .2s;
}
.header-search:hover {
  color: var(--brand);
  border-color: rgba(34, 211, 238, .35);
  background: rgba(34, 211, 238, .06);
}

/* ========== 移动底部 Tab ========== */
.mobile-tabbar {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 98;
  height: 60px;
  background: rgba(13, 20, 36, .98);
  border-top: 1px solid #1e293b;
  backdrop-filter: blur(12px);
}
.mobile-tabbar-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  height: 100%;
  max-width: 600px;
  margin: 0 auto;
}
.mobile-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: var(--text-weak);
  font-size: 11px;
  transition: color .2s;
}
.mobile-tab i { font-size: 19px; }
.mobile-tab:hover { color: var(--text-head); }
.mobile-tab.is-active { color: var(--brand); }

body {
  padding-bottom: 0;
}
@media (max-width: 640px) {
  body { padding-bottom: 74px; }
  .mobile-tabbar { display: block; }
  .site-header { display: none; }
}

/* ========== 帮助 Hero ========== */
.help-hero {
  position: relative;
  padding: 92px 0 82px;
  background:
    linear-gradient(115deg, rgba(10, 14, 26, .97) 0%, rgba(13, 27, 46, .9) 55%, rgba(10, 14, 26, .6) 100%),
    url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
  border-bottom: 1px solid #1c2740;
  overflow: hidden;
}
.help-hero-inner {
  position: relative;
  z-index: 2;
}
.help-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(34, 211, 238, .1);
  border: 1px solid rgba(34, 211, 238, .35);
  color: var(--brand);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 13px;
  margin-bottom: 22px;
}
.help-hero h1 {
  font-size: 34px;
  line-height: 1.3;
  max-width: 620px;
  margin-bottom: 16px;
  color: #fff;
}
.help-hero h1 .hl {
  color: var(--brand);
}
.help-hero-desc {
  font-size: 16px;
  color: #b9c7db;
  max-width: 500px;
  margin-bottom: 28px;
  line-height: 1.8;
}
.help-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}
.hero-proof {
  display: flex;
  gap: 22px;
  margin-top: 30px;
  color: var(--text-weak);
  font-size: 13px;
}
.hero-proof span i {
  color: var(--success);
  margin-right: 5px;
}
.help-hero-visual {
  position: relative;
  display: flex;
  justify-content: flex-end;
}
.help-hero-visual img {
  width: 290px;
  max-width: 100%;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, .14);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .4);
}
.hero-visual-glow {
  position: absolute;
  right: -20px;
  top: 40px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, .22), transparent 68%);
  filter: blur(10px);
  z-index: -1;
}

/* ========== 通用区域 ========== */
.section-block { padding: 78px 0; }
.section-block.alt { background: var(--bg-section); }
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: .3px;
}
.section-kicker:before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
}
.section-title {
  font-size: 27px;
  line-height: 1.3;
  margin-bottom: 8px;
}
.section-lead {
  color: var(--text-sub);
  font-size: 15px;
  max-width: 650px;
  margin-bottom: 34px;
}
.section-head-center .section-lead { margin-left: auto; margin-right: auto; }
.section-head-center { text-align: center; }
.section-head-center .section-kicker:before { display: none; }

/* ========== 快捷支持卡 ========== */
.support-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.support-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 24px 26px;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  position: relative;
  overflow: hidden;
}
.support-card:after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--brand), transparent 80%);
  opacity: 0;
  transition: opacity .25s;
}
.support-card:hover {
  transform: translateY(-5px);
  border-color: var(--line-bright);
  box-shadow: var(--shadow-card);
}
.support-card:hover:after { opacity: .7; }
.support-icon {
  width: 52px;
  height: 52px;
  border-radius: 13px;
  background: rgba(34, 211, 238, .1);
  border: 1px solid rgba(34, 211, 238, .25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  font-size: 22px;
  margin-bottom: 18px;
}
.support-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}
.support-card p {
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.65;
  margin-bottom: 0;
}

@media (max-width: 1024px) {
  .support-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .support-grid { grid-template-columns: 1fr; }
  .section-block { padding: 48px 0; }
  .help-hero h1 { font-size: 27px; }
}

/* ========== 新手流程 ========== */
.flow-section {
  background: var(--bg-section);
  border-top: 1px solid rgba(255, 255, 255, .03);
  border-bottom: 1px solid rgba(255, 255, 255, .03);
}
.flow-wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  counter-reset: flow;
}
.flow-step {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 24px 24px;
  position: relative;
  transition: border-color .25s ease, transform .25s ease;
}
.flow-step:hover {
  border-color: rgba(34, 211, 238, .42);
  transform: translateY(-4px);
}
.flow-num {
  font-family: var(--mono-set);
  font-size: 22px;
  font-weight: 700;
  color: rgba(34, 211, 238, .55);
  letter-spacing: -1px;
  line-height: 1;
  margin-bottom: 12px;
}
.flow-step h3 {
  font-size: 17px;
  margin-bottom: 6px;
}
.flow-step > p {
  color: var(--text-sub);
  font-size: 13px;
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 1024px) {
  .flow-wrap { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .flow-wrap { grid-template-columns: 1fr; }
}

/* ========== FAQ ========== */
.faq-section { position: relative; }
.faq-head-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 34px;
}
.faq-head-row .section-kicker { margin-bottom: 6px; }

.faq-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color .25s ease, background .25s ease;
}
.faq-item.active {
  border-color: rgba(34, 211, 238, .4);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  background: transparent;
  border: none;
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-head);
  line-height: 1.5;
}
.faq-q i {
  color: var(--brand);
  width: 18px;
  font-size: 16px;
  flex-shrink: 0;
}
.faq-arrow {
  margin-left: auto;
  color: var(--text-weak);
  transition: transform .3s ease;
}
.faq-item.active .faq-arrow { transform: rotate(180deg); color: var(--brand); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.faq-a-inner {
  padding: 0 20px 20px 52px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.75;
}
.faq-a-inner p { margin-bottom: 8px; }
.faq-a-inner p:last-child { margin: 0; }

@media (max-width: 1024px) {
  .faq-list { grid-template-columns: 1fr; }
}

/* ========== 安全须知大图 ========== */
.security-band {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .08);
  background:
    linear-gradient(290deg, rgba(7, 11, 20, .4) 0%, rgba(10, 14, 26, .85) 100%),
    url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  padding: 48px 46px;
}
.security-band h2 {
  color: #fff;
  font-size: 25px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.security-band h2 i {
  color: var(--accent);
  font-size: 24px;
}
.security-tips {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 30px;
  margin-top: 24px;
}
.security-tip {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: rgba(13, 20, 36, .55);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 12px;
  padding: 14px 16px;
  color: var(--text-main);
  font-size: 14px;
  line-height: 1.6;
}
.security-tip i {
  color: var(--success);
  margin-top: 6px;
}
@media (max-width: 768px) {
  .security-band { padding: 30px 22px; }
  .security-tips { grid-template-columns: 1fr; }
}

/* ========== 联系支持与表单 ========== */
.contact-wrap {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: 50px;
  align-items: start;
}
.contact-info-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
}
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
}
.contact-info-item:first-of-type { padding-top: 6px; }
.contact-info-item:last-child { border-bottom: none; padding-bottom: 6px; }
.contact-info-item i {
  color: var(--brand);
  font-size: 20px;
  width: 30px;
  line-height: 1.4;
  text-align: center;
  flex-shrink: 0;
}
.contact-info-item h3 {
  font-size: 15px;
  margin-bottom: 4px;
}
.contact-info-item p {
  color: var(--text-sub);
  font-size: 14px;
  margin: 0;
}

.contact-form-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px 32px;
}
.contact-form-card h3 {
  font-size: 20px;
  margin-bottom: 6px;
}
.contact-form-card > p {
  color: var(--text-sub);
  font-size: 14px;
  margin-bottom: 22px;
}
.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #c6d4e6;
  margin-bottom: 7px;
}
.form-label .req { color: var(--danger); margin-left: 2px; }
.form-field {
  width: 100%;
  background: #0a101d;
  border: 1px solid #25334d;
  border-radius: 9px;
  color: var(--text-head);
  font-size: 14px;
  padding: 11px 13px;
  margin-bottom: 18px;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.form-field::placeholder { color: #53647a; }
.form-field:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, .14);
  background: #0c1424;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 18px;
}
@media (max-width: 768px) {
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 1024px) {
  .contact-wrap { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 640px) {
  .contact-form-card { padding: 24px 18px; }
  .contact-info-card { padding: 24px 16px; }
  .section-title { font-size: 22px; }
}

/* ========== CTA ========== */
.help-cta {
  border-radius: 20px;
  background:
    linear-gradient(120deg, rgba(21, 35, 59, .9), rgba(10, 14, 26, .96)),
    url('/assets/images/backpic/back-1.webp') right center / cover no-repeat;
  border: 1px solid rgba(34, 211, 238, .25);
  padding: 48px 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}
.help-cta h2 {
  font-size: 25px;
  color: #fff;
  margin-bottom: 8px;
}
.help-cta p {
  color: var(--text-sub);
  font-size: 15px;
  margin: 0;
}
.help-cta-actions {
  display: flex;
  gap: 14px;
  flex-shrink: 0;
}
@media (max-width: 640px) {
  .help-cta { padding: 30px 24px; flex-direction: column; align-items: flex-start; }
  .help-cta h2 { font-size: 20px; }
}

/* ========== 页脚 ========== */
.site-footer {
  margin-top: 40px;
  background: var(--bg-deep);
  border-top: 1px solid #1a2335;
  padding: 50px 0 24px;
  font-size: 14px;
}
.site-footer .footer-brand-p {
  color: #7d8ea6;
  line-height: 1.75;
  font-size: 13px;
  max-width: 90%;
}
.footer-title {
  color: #c9d6e8;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 14px;
  position: relative;
  padding-bottom: 8px;
}
.footer-title:before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 20px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
}
.footer-link {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-link li {
  margin-bottom: 8px;
  position: relative;
}
.footer-link a {
  color: #7d8ea6;
  font-size: 13px;
  transition: color .2s ease, padding-left .2s ease;
  padding-left: 2px;
}
.footer-link a i {
  font-size: 10px;
  margin-right: 6px;
  color: #55667c;
  transition: transform .2s ease;
}
.footer-link a:hover {
  color: #fff;
  padding-left: 6px;
}
.footer-link a:hover i {
  color: var(--brand);
  transform: translateX(2px);
}
.footer-bottom {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid #1a2335;
  text-align: center;
}
.footer-bottom p {
  color: #627086;
  font-size: 13px;
  margin: 0 0 4px;
}
.footer-bottom a { color: #8b9bb3; }
.footer-bottom a:hover { color: #fff; }
.footer-bottom .footer-site-slogan {
  font-size: 12px;
  color: #56667c;
  margin-top: 6px;
}
.badge-gray {
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .09);
  padding: 3px 8px;
  font-size: 12px;
  color: #8194ab;
  border-radius: 999px;
}

/* ========== 其他响应式细节 ========== */
@media (max-width: 1024px) {
  .main-nav { gap: 20px; }
  .header-inner { gap: 14px; }
  .nav-item { font-size: 14px; }
  .header-right .btn-primary { display: none; }
}

@media (max-width: 640px) {
  .help-hero { padding: 50px 0 46px; }
  .help-hero-visual { display: none; }
  .hero-proof { flex-wrap: wrap; gap: 12px; font-size: 12px; }
  .faq-head-row { flex-direction: column; align-items: flex-start; }
  .faq-q { font-size: 14px; padding: 16px 14px; }
  .faq-a-inner { padding-left: 46px; }
  .help-cta-actions { width: 100%; }
  .help-cta-actions .btn-primary,
  .help-cta-actions .btn-secondary { flex: 1; }
}