/* roulang page: index */
:root{
  --bg:#060A17;
  --bg-deep:#04060E;
  --bg-card:rgba(13,26,54,.58);
  --primary:#00E5FF;
  --secondary:#FFB020;
  --text:#E6EFF8;
  --text-muted:#93A3BD;
  --text-dim:#55627C;
  --border:rgba(128,218,255,.14);
  --border-light:rgba(128,218,255,.3);
  --radius:16px;
  --radius-sm:10px;
  --radius-pill:999px;
  --shadow:0 16px 40px rgba(3,7,22,.45);
  --container:1200px;
  --font:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --grad-text:linear-gradient(90deg,#F2F8FF,#6FD4FF);
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:radial-gradient(1100px 650px at 75% -20%,#0B1B40 0%,#060A17 55%,#04060E 100%);
  color:var(--text);
  font-family:var(--font);
  font-size:15px;
  line-height:1.75;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .25s ease,border-color .25s ease}
a:hover{color:#7DF0FF}
ul{list-style:none}
input,button{font-family:inherit;font-size:inherit}
button{cursor:pointer;border:none;background:none}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--primary);border-bottom:1px solid transparent;transition:all .25s ease}
.text-link:hover{border-bottom-color:var(--primary);color:#7DF0FF}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(6,10,23,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.header-top__inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand__icon{width:34px;height:34px;flex-shrink:0;position:relative;display:grid;place-items:center;border-radius:50%;background:conic-gradient(from 180deg,#00E5FF,#0B1B40,#00E5FF);box-shadow:0 0 18px rgba(0,229,255,.35)}
.brand__icon::after{content:'';width:18px;height:18px;border-radius:50%;background:#060A17;border:2px solid var(--primary)}
.brand__text{font-size:20px;font-weight:700;letter-spacing:.5px;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent;white-space:nowrap}
.header-top__slogan{font-size:13px;color:var(--text-muted);white-space:nowrap;display:none}
.header-top__right{display:flex;align-items:center;gap:14px;margin-left:auto}
.search-box{display:flex;align-items:center;background:rgba(13,26,54,.6);border:1px solid var(--border);border-radius:var(--radius-pill);padding:4px 6px 4px 16px;backdrop-filter:blur(10px);transition:border-color .25s ease;width:260px}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,229,255,.12)}
.search-box input{background:transparent;border:none;outline:none;color:var(--text);font-size:14px;width:100%}
.search-box input::placeholder{color:var(--text-dim)}
.search-box button{width:32px;height:32px;display:grid;place-items:center;border-radius:50%;color:var(--primary);transition:background .2s ease}
.search-box button:hover{background:rgba(0,229,255,.12)}
.mobile-menu-btn{display:none;width:42px;height:42px;flex-direction:column;justify-content:center;align-items:center;gap:5px;border-radius:10px;border:1px solid var(--border);background:rgba(13,26,54,.4)}
.mobile-menu-btn span{width:20px;height:2px;background:var(--text);border-radius:2px;transition:all .3s ease}
.mobile-menu-btn.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.mobile-menu-btn.active span:nth-child(2){opacity:0}
.mobile-menu-btn.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.header-nav{border-top:1px solid rgba(128,218,255,.08)}
.header-nav__inner{display:flex;align-items:center;min-height:48px;overflow-x:auto;scrollbar-width:none}
.header-nav__inner::-webkit-scrollbar{display:none}
.channel-tabs{display:flex;align-items:center;gap:8px;padding:6px 0}
.channel-tabs .tab{display:inline-flex;align-items:center;padding:7px 18px;border-radius:var(--radius-pill);font-size:14px;font-weight:500;color:var(--text-muted);border:1px solid transparent;white-space:nowrap;transition:all .25s ease}
.channel-tabs .tab:hover{color:#7DF0FF;border-color:var(--border)}
.channel-tabs .tab.active{background:rgba(0,229,255,.15);border-color:rgba(0,229,255,.32);color:var(--primary);font-weight:600}

/* Mobile menu */
.mobile-menu{display:none;position:fixed;top:68px;left:0;right:0;z-index:99;background:rgba(6,10,23,.97);backdrop-filter:blur(14px);padding:20px 24px 28px;border-bottom:1px solid var(--border);transform:translateY(-120%);transition:transform .35s ease}
.mobile-menu.open{transform:translateY(0)}
.mobile-menu .channel-tabs{flex-direction:column;align-items:stretch;gap:10px;margin-bottom:20px}
.mobile-menu .channel-tabs .tab{justify-content:center;padding:11px;border-radius:10px;font-size:15px}
.mobile-menu .search-box{width:100%;margin-bottom:14px}
.mobile-menu .btn{width:100%;justify-content:center}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;border-radius:var(--radius-sm);padding:12px 26px;font-size:14px;transition:all .25s ease;border:1px solid transparent}
.btn--sm{padding:8px 20px;font-size:13px}
.btn--primary{background:var(--primary);color:#002B3A;box-shadow:0 0 22px rgba(0,229,255,.45)}
.btn--primary:hover{background:#38EBFF;color:#002B3A;box-shadow:0 0 32px rgba(0,229,255,.65);transform:translateY(-2px)}
.btn--primary:disabled,.btn--primary.is-success{background:var(--text-dim);color:#E6EFF8;box-shadow:none;cursor:default;transform:none}
.btn--ghost{background:rgba(13,26,54,.55);border-color:rgba(255,255,255,.2);color:var(--text)}
.btn--ghost:hover{border-color:var(--primary);color:var(--primary);box-shadow:0 0 18px rgba(0,229,255,.15)}
.btn:focus-visible,.search-box button:focus-visible,.mobile-menu-btn:focus-visible{outline:2px solid rgba(0,229,255,.6);outline-offset:2px}

/* Hero */
.hero{position:relative;min-height:92vh;display:flex;align-items:center;background:linear-gradient(rgba(6,10,23,.7),rgba(6,10,23,.7)),url('/assets/images/backpic/back-1.png') center/cover no-repeat;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,10,23,.95) 10%,rgba(6,10,23,.6) 55%,rgba(4,6,14,.4) 100%);z-index:1}
.hero__container{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:40px;align-items:center;padding-top:70px;padding-bottom:70px}
.hero__main{max-width:720px}
.live-cover{position:relative;max-width:460px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border-light);box-shadow:var(--shadow);margin-bottom:32px}
.live-cover__img{width:100%;height:220px;object-fit:cover}
.live-cover__badge{position:absolute;top:14px;left:14px;z-index:2;background:rgba(0,229,255,.92);color:#002B3A;font-size:12px;font-weight:700;padding:4px 14px;border-radius:var(--radius-pill);box-shadow:0 0 16px rgba(0,229,255,.5);animation:pulse-glove 2.4s infinite}
@keyframes pulse-glove{0%,100%{box-shadow:0 0 14px rgba(0,229,255,.45)}50%{box-shadow:0 0 26px rgba(255,176,32,.55)}}
.live-cover__channel{position:absolute;bottom:0;left:0;right:0;padding:26px 14px 10px;font-size:12px;color:#E6EFF8;background:linear-gradient(0deg,rgba(6,10,23,.85),transparent)}
.hero__title{font-size:42px;font-weight:700;line-height:1.25;letter-spacing:.5px;margin-bottom:16px;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__subtitle{font-size:16px;color:var(--text-muted);line-height:1.7;margin-bottom:30px;max-width:560px}
.countdown__date{font-size:13px;color:var(--secondary);margin-bottom:14px;font-weight:600}
.countdown__slots{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.countdown__slot{width:84px;height:96px;background:rgba(13,26,54,.58);backdrop-filter:blur(18px);border:1px solid var(--border);border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;box-shadow:inset 0 1px 0 rgba(255,255,255,.06)}
.countdown__num{font-family:"Segoe UI",system-ui,sans-serif;font-size:34px;font-weight:700;color:var(--primary);font-variant-numeric:tabular-nums;text-shadow:0 0 18px rgba(0,229,255,.5);line-height:1}
.countdown__label{font-size:12px;color:var(--text-muted)}
.countdown__sep{font-size:28px;color:var(--primary);font-weight:300;text-shadow:0 0 12px rgba(0,229,255,.7)}
.highlights{margin:32px 0;display:grid;gap:0}
.highlights li{display:flex;align-items:center;gap:14px;padding:13px 0;border-bottom:1px solid rgba(128,218,255,.1);font-size:14px;color:var(--text);transition:all .25s ease}
.highlights li:hover{transform:translateX(4px)}
.highlights li:hover .highlights__num{color:var(--secondary)}
.highlights__num{font-size:13px;font-weight:700;color:var(--primary);font-variant-numeric:tabular-nums;letter-spacing:1px;min-width:34px}
.subscribe-form{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.subscribe-form input{flex:1;min-width:240px;background:rgba(13,26,54,.7);border:1px solid var(--border);border-radius:var(--radius-sm);padding:13px 18px;color:var(--text);font-size:14px;outline:none;transition:border-color .25s ease}
.subscribe-form input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,229,255,.12)}
.subscribe-form input::placeholder{color:var(--text-dim)}
.subscribe-form__hint{font-size:13px;color:var(--text-dim);margin-top:10px;width:100%}
.hero__side{display:flex;flex-direction:column;align-items:flex-end;justify-content:flex-end;min-height:100%}
.replay-panel{text-align:right}
.replay-panel__btn{margin-bottom:18px}
.replay-panel__title{font-size:13px;color:var(--text-muted);margin-bottom:10px;text-align:left}
.replay-panel__cards{display:flex;flex-direction:column;gap:12px}
.replay-card{display:flex;align-items:center;gap:10px;background:rgba(13,26,54,.6);border:1px solid var(--border);border-radius:12px;padding:6px;transition:all .25s ease;width:230px}
.replay-card:hover{border-color:var(--border-light);transform:translateY(-3px)}
.replay-card img{width:110px;height:70px;object-fit:cover;border-radius:8px;flex-shrink:0}
.replay-card span{font-size:12px;color:var(--text-muted);line-height:1.4}

/* Section base */
.section{padding:96px 0;position:relative}
.section--news{background:rgba(4,6,14,.35)}
.section__header{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:44px;flex-wrap:wrap}
.section-title{font-size:30px;font-weight:700;line-height:1.3;display:flex;align-items:center;gap:14px;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.section-title::before{content:'';width:4px;height:26px;border-radius:2px;background:linear-gradient(180deg,var(--primary),rgba(0,229,255,.15));flex-shrink:0}
.section-subtitle{font-size:15px;color:var(--text-muted);max-width:560px;margin-top:12px;padding-left:18px;border-left:2px solid rgba(0,229,255,.3)}

/* News List */
.news-list{display:grid;gap:18px}
.news-card{display:grid;grid-template-columns:128px 1fr;gap:20px;background:rgba(13,26,54,.55);border:1px solid var(--border);border-radius:14px;padding:14px 16px;transition:all .28s ease;box-shadow:0 8px 26px rgba(3,7,22,.3)}
.news-card:hover{transform:translateY(-4px);border-color:var(--border-light);box-shadow:var(--shadow)}
.news-card:hover .news-card__title{color:var(--primary)}
.news-card__thumb{width:128px;height:96px;border-radius:12px;overflow:hidden;flex-shrink:0}
.news-card__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.news-card:hover .news-card__thumb img{transform:scale(1.06)}
.news-card__body{display:flex;flex-direction:column;justify-content:center;min-width:0}
.news-card__title{font-size:16px;font-weight:600;color:var(--text);line-height:1.45;margin-bottom:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:color .25s ease}
.news-card__summary{font-size:14px;color:var(--text-muted);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:10px}
.news-card__meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text-dim);flex-wrap:wrap}
.pill{display:inline-flex;align-items:center;background:rgba(0,229,255,.12);border:1px solid rgba(0,229,255,.22);color:var(--primary);font-size:12px;font-weight:600;padding:2px 12px;border-radius:var(--radius-pill)}
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:56px 20px;background:rgba(13,26,54,.35);border:1px dashed var(--border);border-radius:var(--radius);text-align:center;gap:14px}
.empty-state p{color:var(--text-muted);font-size:15px}
.empty-state svg{width:46px;height:46px;color:var(--text-dim)}

/* Features */
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feature-card{background:rgba(13,26,54,.55);border:1px solid var(--border);border-radius:var(--radius);padding:30px 24px;transition:all .3s ease;box-shadow:inset 0 1px 0 rgba(255,255,255,.04)}
.feature-card:hover{transform:translateY(-5px);border-color:var(--border-light);box-shadow:var(--shadow)}
.feature-card__icon{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,rgba(0,229,255,.16),rgba(0,229,255,.04));border:1px solid rgba(0,229,255,.2);display:grid;place-items:center;margin-bottom:20px;color:var(--primary)}
.feature-card__title{font-size:16px;font-weight:600;color:var(--text);margin-bottom:10px}
.feature-card__desc{font-size:14px;color:var(--text-muted);line-height:1.65}

/* Stats */
.section--stats{padding:72px 0;background:rgba(4,6,14,.5);border-top:1px solid rgba(128,218,255,.06);border-bottom:1px solid rgba(128,218,255,.06)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-item{text-align:center;padding:20px}
.stat-num{font-size:40px;font-weight:800;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent;font-variant-numeric:tabular-nums;line-height:1.2}
.stat-label{font-size:14px;color:var(--text-muted);margin-top:8px}

/* Guide */
.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.guide-media{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow);position:relative}
.guide-media img{width:100%;height:360px;object-fit:cover}
.guide-media::after{content:'';position:absolute;inset:0;background:linear-gradient(0deg,rgba(6,10,23,.4),transparent)}
.guide-steps{display:grid;gap:28px}
.step-card{display:flex;gap:18px;align-items:flex-start}
.step-card__num{width:40px;height:40px;border-radius:12px;background:rgba(0,229,255,.12);border:1px solid rgba(0,229,255,.25);color:var(--primary);display:grid;place-items:center;font-weight:700;font-size:16px;flex-shrink:0}
.step-card__body h3{font-size:17px;font-weight:600;color:var(--text);margin-bottom:6px}
.step-card__body p{font-size:14px;color:var(--text-muted);line-height:1.65}

/* Testimonials */
.section--testimonials{background:rgba(4,6,14,.25)}
.testimonials-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.testimonial-card{background:rgba(13,26,54,.55);border:1px solid var(--border);border-radius:var(--radius);padding:26px 22px;transition:all .3s ease}
.testimonial-card:hover{transform:translateY(-4px);border-color:var(--border-light)}
.testimonial-card__text{font-size:14px;color:var(--text);line-height:1.7;margin-bottom:18px;padding-left:14px;border-left:3px solid rgba(255,176,32,.5)}
.testimonial-card__author{font-size:13px;color:var(--text-muted);font-weight:600}

/* FAQ */
.section--faq{background:rgba(4,6,14,.3)}
.faq-list{max-width:780px;margin:0 auto;display:grid;gap:14px}
.faq-item{background:rgba(13,26,54,.55);border:1px solid var(--border);border-radius:14px;overflow:hidden;transition:border-color .3s ease}
.faq-item.active{border-color:rgba(0,229,255,.35)}
.faq-item__header{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 22px;text-align:left;color:var(--text);font-size:15px;font-weight:600;cursor:pointer;transition:background .2s ease}
.faq-item__header:hover{background:rgba(0,229,255,.04)}
.faq-item__header .q-mark{color:var(--primary);font-weight:700;flex-shrink:0}
.faq-item__icon{flex-shrink:0;width:26px;height:26px;display:grid;place-items:center;border-radius:8px;background:rgba(0,229,255,.1);color:var(--primary);font-size:18px;font-weight:400;transition:transform .3s ease}
.faq-item.active .faq-item__icon{transform:rotate(45deg)}
.faq-item__body{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-item__body p{padding:0 22px 20px;font-size:14px;color:var(--text-muted);line-height:1.7}

/* CTA */
.section--cta{padding:80px 0}
.cta-panel{position:relative;background:linear-gradient(135deg,rgba(11,27,64,.9),rgba(6,10,23,.85)),url('/assets/images/backpic/back-2.webp') center/cover no-repeat;border:1px solid var(--border-light);border-radius:24px;padding:64px 48px;text-align:center;overflow:hidden;box-shadow:var(--shadow)}
.cta-panel::before{content:'';position:absolute;top:-40%;right:-20%;width:400px;height:400px;background:radial-gradient(circle,rgba(0,229,255,.14),transparent 60%);pointer-events:none}
.cta-panel::after{content:'';position:absolute;bottom:-50%;left:-20%;width:380px;height:380px;background:radial-gradient(circle,rgba(255,176,32,.1),transparent 60%);pointer-events:none}
.cta-panel h2{font-size:30px;font-weight:700;margin-bottom:14px;position:relative;z-index:1;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.cta-panel p{font-size:15px;color:var(--text-muted);max-width:520px;margin:0 auto 28px;position:relative;z-index:1}
.cta-panel .subscribe-form{max-width:480px;margin-left:auto;margin-right:auto;position:relative;z-index:1}
.cta-panel .subscribe-form__hint{text-align:center}

/* Footer */
.site-footer{background:#030611;border-top:1px solid rgba(128,218,255,.08);padding:48px 0 30px}
.footer-top{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;padding-bottom:32px;border-bottom:1px solid rgba(128,218,255,.07)}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand__text{font-size:18px;font-weight:700;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.footer-desc{font-size:13px;color:var(--text-muted);max-width:360px;margin-top:8px}
.footer-nav{display:flex;gap:26px;flex-wrap:wrap}
.footer-nav a{font-size:14px;color:var(--text-muted);transition:color .25s ease}
.footer-nav a:hover{color:var(--primary)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding-top:24px;font-size:13px;color:var(--text-dim)}

/* Responsive */
@media (max-width: 1024px){
  .hero{min-height:auto}
  .hero__container{grid-template-columns:1fr;gap:36px}
  .hero__side{align-items:flex-start;justify-content:flex-start}
  .replay-panel{text-align:left}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .guide-grid{grid-template-columns:1fr;gap:36px}
  .testimonials-grid{grid-template-columns:repeat(3,1fr)}
  .header-top__slogan{display:block}
}
@media (max-width: 768px){
  .header-top__right .search-box{display:none}
  .header-top__right .btn{display:none}
  .mobile-menu-btn{display:flex}
  .mobile-menu{display:block}
  .hero__title{font-size:30px}
  .countdown__slot{width:70px;height:80px}
  .countdown__num{font-size:26px}
  .section{padding:60px 0}
  .news-card{grid-template-columns:100px 1fr;gap:14px;padding:12px}
  .news-card__thumb{width:100px;height:80px}
  .news-card__title{font-size:15px}
  .testimonials-grid{grid-template-columns:1fr}
  .guide-media img{height:280px}
  .cta-panel{padding:44px 24px}
  .cta-panel h2{font-size:24px}
  .footer-top{flex-direction:column;align-items:flex-start}
}
@media (max-width: 520px){
  .hero__title{font-size:26px}
  .hero__subtitle{font-size:15px}
  .countdown__slots{gap:8px}
  .countdown__slot{width:60px;height:72px}
  .countdown__num{font-size:22px}
  .countdown__sep{font-size:18px}
  .subscribe-form{flex-direction:column}
  .subscribe-form .btn{width:100%}
  .features-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr;gap:16px}
  .stat-num{font-size:30px}
  .news-card{grid-template-columns:1fr}
  .news-card__thumb{width:100%;height:140px}
  .section-title{font-size:22px}
  .footer-bottom{flex-direction:column;text-align:center}
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
:root {
  --bg-primary: #060A17;
  --bg-card: rgba(13, 26, 54, 0.58);
  --bg-footer: #030611;
  --brand-primary: #00E5FF;
  --brand-accent: #FFB020;
  --text-primary: #E6EFF8;
  --text-secondary: #93A3BD;
  --text-muted: #55627C;
  --border-glass: rgba(128, 218, 255, 0.14);
  --border-hover: rgba(128, 218, 255, 0.30);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-tag: 999px;
  --shadow-card: 0 16px 40px rgba(3, 7, 22, 0.45);
  --transition: all 0.3s ease;
  --container-max: 1200px;
  --font-stack: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* ========== Reset / 基础 ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-stack);
  background: var(--bg-primary);
  background-image: radial-gradient(1100px 650px at 75% -20%, #0B1B40 0%, #060A17 55%, #04060E 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

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

a:hover {
  color: var(--brand-primary);
  text-decoration: underline;
}

button, input {
  font-family: inherit;
  font-size: inherit;
}

ul, ol {
  list-style: none;
}

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

/* ========== 按钮 ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--brand-primary);
  color: #002B3A;
  font-weight: 600;
  font-size: 14px;
  border: none;
  border-radius: var(--radius-btn);
  cursor: pointer;
  box-shadow: 0 0 22px rgba(0, 229, 255, 0.45);
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary:hover {
  background: #33eaff;
  box-shadow: 0 0 32px rgba(0, 229, 255, 0.60);
  color: #002B3A;
  transform: translateY(-2px);
  text-decoration: none;
}

.btn-primary:focus-visible {
  outline: 2px solid rgba(0, 229, 255, 0.6);
  outline-offset: 2px;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 14px;
  border: 1px solid rgba(255, 255, 255, 0.20);
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-ghost:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  background: rgba(0, 229, 255, 0.08);
  text-decoration: none;
}

.btn-ghost:focus-visible {
  outline: 2px solid rgba(0, 229, 255, 0.6);
  outline-offset: 2px;
}

/* ========== Header / 双层导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 10, 23, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-glass);
}

.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 24px;
  max-width: var(--container-max);
  margin: 0 auto;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
  color: var(--text-primary);
}

.brand:hover {
  text-decoration: none;
  color: var(--text-primary);
}

.brand__icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: conic-gradient(from 180deg, #00E5FF, #0046a8, #00E5FF);
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.5);
  position: relative;
  flex-shrink: 0;
}

.brand__text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, #F2F8FF, #6FD4FF);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

.header-tagline {
  font-size: 13px;
  color: var(--text-secondary);
  display: none;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.header-tagline i {
  color: var(--brand-primary);
  font-size: 12px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header-search {
  position: relative;
  display: flex;
  align-items: center;
}

.header-search input {
  width: 200px;
  height: 36px;
  padding: 0 36px 0 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-tag);
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
  transition: var(--transition);
}

.header-search input::placeholder {
  color: var(--text-muted);
}

.header-search input:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.15);
}

.header-search i {
  position: absolute;
  right: 14px;
  color: var(--text-muted);
  font-size: 13px;
  pointer-events: none;
}

.btn-remind {
  padding: 8px 20px;
  font-size: 13px;
  border-radius: var(--radius-tag);
  white-space: nowrap;
}

.header-burger {
  display: none;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.header-burger:hover {
  border-color: var(--brand-primary);
}

/* 频道 Tabs */
.channel-tabs {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 8px 24px 10px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.channel-tabs::-webkit-scrollbar {
  display: none;
}

.channel-tabs .tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-tag);
  white-space: nowrap;
  text-decoration: none;
  transition: var(--transition);
}

.channel-tabs .tab:hover {
  color: var(--brand-primary);
  border-color: var(--border-glass);
  background: rgba(0, 229, 255, 0.06);
  text-decoration: none;
}

.channel-tabs .tab.active {
  color: var(--brand-primary);
  background: rgba(0, 229, 255, 0.20);
  border-color: rgba(0, 229, 255, 0.40);
  font-weight: 600;
}

.channel-tabs .tab i {
  font-size: 12px;
}

/* ========== 移动端抽屉 ========== */
.mobile-drawer {
  display: none;
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100vh;
  background: #0a1024;
  z-index: 200;
  padding: 24px;
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
  transition: right 0.3s ease;
  border-left: 1px solid var(--border-glass);
}

.mobile-drawer.open {
  right: 0;
}

.drawer-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 150;
}

.drawer-overlay.active {
  display: block;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.drawer-close {
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 16px;
  cursor: pointer;
}

.drawer-search {
  margin-bottom: 16px;
}

.drawer-search input {
  width: 100%;
  height: 40px;
  padding: 0 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-tag);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
}

.drawer-search input:focus {
  border-color: var(--brand-primary);
}

.drawer-btn {
  width: 100%;
  justify-content: center;
  margin-top: 8px;
}

/* ========== Hero ========== */
.category-hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  padding: 80px 0 64px;
  background-image: linear-gradient(rgba(6, 10, 23, 0.65), rgba(6, 10, 23, 0.80)), url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--border-glass);
  overflow: hidden;
}

.category-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(800px 400px at 20% 80%, rgba(0, 229, 255, 0.08), transparent 60%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(0, 229, 255, 0.15);
  border: 1px solid rgba(0, 229, 255, 0.30);
  border-radius: var(--radius-tag);
  font-size: 13px;
  color: var(--brand-primary);
  margin-bottom: 20px;
  font-weight: 500;
}

.hero-badge i {
  font-size: 11px;
}

.hero-title {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  background: linear-gradient(90deg, #F2F8FF, #6FD4FF);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 640px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-stat-row {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border-glass);
}

.hero-stat {
  text-align: left;
}

.hero-stat__num {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.hero-stat__num span {
  color: var(--brand-primary);
}

.hero-stat__label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ========== 通用 Section ========== */
.section {
  padding: 96px 0;
}

.section-head {
  margin-bottom: 48px;
  text-align: center;
}

.section-head .section-kicker {
  display: inline-block;
  font-size: 13px;
  color: var(--brand-primary);
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
  background: rgba(0, 229, 255, 0.10);
  padding: 4px 14px;
  border-radius: var(--radius-tag);
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
  background: linear-gradient(90deg, #F2F8FF, #6FD4FF);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.75;
}

/* section 分割装饰 */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.20), transparent);
  max-width: var(--container-max);
  margin: 0 auto;
}

/* ========== 指南概览 ========== */
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.overview-media {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.overview-media img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.overview-media:hover img {
  transform: scale(1.03);
}

.overview-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(6, 10, 23, 0.60));
}

.overview-media-tag {
  position: absolute;
  bottom: 16px;
  left: 16px;
  z-index: 2;
  padding: 4px 14px;
  background: rgba(0, 229, 255, 0.25);
  border: 1px solid rgba(0, 229, 255, 0.40);
  border-radius: var(--radius-tag);
  font-size: 12px;
  color: var(--text-primary);
  backdrop-filter: blur(8px);
}

.overview-body h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.4;
}

.overview-body p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 16px;
  line-height: 1.8;
}

.overview-body ul {
  margin-top: 8px;
}

.overview-body ul li {
  position: relative;
  padding-left: 24px;
  color: var(--text-secondary);
  margin-bottom: 10px;
  font-size: 14px;
  line-height: 1.6;
}

.overview-body ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--brand-primary);
  font-weight: 700;
}

/* ========== 核心功能卡片 ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  transition: var(--transition);
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(0, 229, 255, 0.12);
  border: 1px solid rgba(0, 229, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--brand-primary);
  margin-bottom: 20px;
  transition: var(--transition);
}

.feature-card:hover .feature-card__icon {
  background: rgba(0, 229, 255, 0.22);
  box-shadow: 0 0 18px rgba(0, 229, 255, 0.25);
}

.feature-card__title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.feature-card__desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== 流程步骤 ========== */
.process-section {
  background: rgba(3, 6, 17, 0.40);
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 8px;
}

.process-step {
  position: relative;
  padding: 28px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.process-step:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
}

.process-step__num {
  font-size: 14px;
  font-weight: 700;
  color: var(--brand-accent);
  display: block;
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.process-step__icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(0, 229, 255, 0.10);
  border: 1px solid rgba(0, 229, 255, 0.20);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--brand-primary);
  margin: 0 auto 20px;
}

.process-step__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.process-step__desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.process-arrow {
  position: absolute;
  top: 50%;
  right: -20px;
  z-index: 3;
  width: 40px;
  height: 40px;
  background: #0a1024;
  border: 1px solid var(--border-glass);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-primary);
  font-size: 14px;
  transform: translateY(-50%);
  box-shadow: var(--shadow-card);
}

.process-step:last-child .process-arrow {
  display: none;
}

/* ========== 内容要点 ========== */
.points-section {
  position: relative;
  background-image: linear-gradient(rgba(6, 10, 23, 0.80), rgba(6, 10, 23, 0.85)), url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
}

.points-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.points-body .section-title {
  font-size: 28px;
  margin-bottom: 16px;
}

.points-body > p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 24px;
  line-height: 1.8;
}

.points-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.points-list li:last-child {
  border-bottom: none;
}

.points-list__icon {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: rgba(255, 176, 32, 0.12);
  border: 1px solid rgba(255, 176, 32, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--brand-accent);
  flex-shrink: 0;
}

.points-list__content h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.points-list__content p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.points-visual {
  position: relative;
}

.points-visual img {
  width: 100%;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-glass);
}

/* ========== 推荐专题 ========== */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.topic-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.topic-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
}

.topic-card__avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 16px;
  border: 2px solid rgba(0, 229, 255, 0.30);
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.15);
}

.topic-card__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.topic-card__name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.topic-card__meta {
  font-size: 12px;
  color: var(--text-muted);
}

.topic-card__btn {
  display: inline-block;
  margin-top: 14px;
  font-size: 13px;
  color: var(--brand-primary);
  font-weight: 500;
  transition: var(--transition);
}

.topic-card__btn:hover {
  text-decoration: underline;
}

/* ========== FAQ ========== */
.faq-section {
  background: rgba(3, 6, 17, 0.30);
  border-top: 1px solid var(--border-glass);
}

.faq-wrap {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(12px);
}

.faq-item:hover {
  border-color: var(--border-hover);
}

.faq-item.open {
  border-color: rgba(0, 229, 255, 0.30);
}

.faq-item__header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 24px;
  cursor: pointer;
  user-select: none;
}

.faq-item__icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(0, 229, 255, 0.12);
  border: 1px solid rgba(0, 229, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--brand-primary);
  flex-shrink: 0;
}

.faq-item__question {
  flex: 1;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
}

.faq-item__toggle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.faq-item.open .faq-item__toggle {
  transform: rotate(45deg);
  color: var(--brand-primary);
  background: rgba(0, 229, 255, 0.10);
}

.faq-item__answer {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
  display: none;
}

.faq-item.open .faq-item__answer {
  display: block;
  animation: fadeIn 0.28s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ========== CTA ========== */
.cta-section {
  padding: 80px 0;
  position: relative;
  background: linear-gradient(rgba(6, 10, 23, 0.75), rgba(6, 10, 23, 0.85)), url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  text-align: center;
}

.cta-section .section-title {
  margin-bottom: 12px;
}

.cta-section .section-desc {
  margin-bottom: 32px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--bg-footer);
  border-top: 1px solid var(--border-glass);
  padding: 48px 0 32px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.brand__icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: conic-gradient(from 180deg, #00E5FF, #0046a8, #00E5FF);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.40);
}

.footer-brand__text {
  font-size: 18px;
  font-weight: 700;
  background: linear-gradient(90deg, #F2F8FF, #6FD4FF);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-desc {
  font-size: 13px;
  color: var(--text-secondary);
  max-width: 400px;
  line-height: 1.7;
}

.footer-nav {
  display: flex;
  gap: 24px;
  align-items: center;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--text-secondary);
  font-size: 13px;
  text-decoration: none;
  transition: var(--transition);
}

.footer-nav a:hover {
  color: var(--brand-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 13px;
  color: var(--text-muted);
}

/* ========== 响应式 ========== */
@media (min-width: 768px) {
  .header-tagline {
    display: flex;
  }
}

@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .topics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

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

  .process-arrow {
    display: none;
  }

  .overview-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .points-wrap {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 26px;
  }

  .hero-title {
    font-size: 30px;
  }

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

  .header-tagline,
  .header-search {
    display: none;
  }

  .header-burger {
    display: flex;
  }

  .header-actions .btn-remind {
    display: none;
  }

  .channel-tabs {
    padding: 6px 16px 8px;
  }

  .footer-top {
    flex-direction: column;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .hero-stat-row {
    gap: 20px;
    flex-wrap: wrap;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-ghost {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .features-grid,
  .topics-grid,
  .process-grid {
    grid-template-columns: 1fr;
  }

  .overview-media img {
    height: 240px;
  }

  .hero-stat__num {
    font-size: 22px;
  }

  .hero-stat__label {
    font-size: 12px;
  }

  .faq-item__question {
    font-size: 14px;
  }
}

/* roulang page: article */
:root {
            --bg-primary: #060A17;
            --bg-secondary: #0B1B40;
            --bg-card: rgba(13, 26, 54, 0.58);
            --accent: #00E5FF;
            --accent-soft: rgba(0, 229, 255, 0.15);
            --accent-secondary: #FFB020;
            --text-primary: #E6F8FF;
            --text-secondary: #93A3BD;
            --text-disabled: #55627C;
            --border-glass: rgba(128, 218, 255, 0.14);
            --border-hover: rgba(128, 218, 255, 0.3);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-pill: 999px;
            --shadow-card: 0 16px 40px rgba(3, 7, 22, 0.45);
            --shadow-btn: 0 0 22px rgba(0, 229, 255, 0.45);
            --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-body);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-primary);
            background: var(--bg-primary);
            background-image: radial-gradient(1100px 650px at 75% -20%, #0B1B40 0%, #060A17 55%, #04060E 100%);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--accent);
            text-decoration: none;
            transition: all 0.3s ease;
        }

        a:hover {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 4px;
            text-decoration-thickness: 2px;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
        }

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

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        .article-page {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(6, 10, 23, 0.82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-glass);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 24px;
            gap: 16px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }

        .brand__icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.2), rgba(0, 229, 255, 0.05));
            border: 1px solid rgba(0, 229, 255, 0.4);
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            flex-shrink: 0;
        }

        .brand__icon::after {
            content: '';
            width: 12px;
            height: 12px;
            border-radius: 3px;
            background: var(--accent);
            box-shadow: 0 0 8px var(--accent);
        }

        .brand__text {
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 0.5px;
            background: linear-gradient(90deg, #F2F8FF, #6FD4FF);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
        }

        .header-subtitle {
            font-size: 13px;
            color: var(--text-secondary);
            margin-left: 8px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

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

        .search-box {
            position: relative;
        }

        .search-box input {
            width: 200px;
            padding: 8px 16px 8px 36px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-size: 13px;
            outline: none;
            transition: all 0.3s ease;
        }

        .search-box input::placeholder {
            color: var(--text-disabled);
        }

        .search-box input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.15);
        }

        .search-box .search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            width: 14px;
            height: 14px;
            border: 2px solid var(--text-secondary);
            border-radius: 50%;
            pointer-events: none;
        }

        .search-box .search-icon::after {
            content: '';
            position: absolute;
            bottom: -4px;
            right: -3px;
            width: 6px;
            height: 2px;
            background: var(--text-secondary);
            transform: rotate(45deg);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 20px;
            border-radius: 10px;
            background: var(--accent);
            color: #002B3A;
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-btn);
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: #33EAFF;
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.65);
            transform: translateY(-1px);
            text-decoration: none;
            color: #002B3A;
        }

        .btn-primary.is-disabled {
            opacity: 0.6;
            cursor: not-allowed;
            box-shadow: none;
            background: var(--text-disabled);
            color: #fff;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 20px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
            font-size: 14px;
            transition: all 0.3s ease;
            text-decoration: none;
        }

        .btn-ghost:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(0, 229, 255, 0.06);
        }

        .channel-tabs {
            display: flex;
            gap: 8px;
            padding: 8px 24px 12px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .channel-tabs::-webkit-scrollbar {
            display: none;
        }

        .tab {
            display: inline-flex;
            align-items: center;
            padding: 6px 18px;
            border-radius: 999px;
            border: 1px solid transparent;
            font-size: 14px;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: all 0.3s ease;
            text-decoration: none;
        }

        .tab:hover {
            color: var(--accent);
            background: rgba(0, 229, 255, 0.08);
            text-decoration: none;
        }

        .tab.active {
            background: var(--accent-soft);
            border-color: rgba(0, 229, 255, 0.3);
            color: var(--accent);
            font-weight: 500;
        }

        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            background: rgba(255, 255, 255, 0.04);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            cursor: pointer;
        }

        .hamburger span {
            display: block;
            width: 18px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .article-main {
            flex: 1;
            padding: 40px 0 80px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            padding: 16px 0 8px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.3s;
        }

        .breadcrumb a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        .breadcrumb .sep {
            color: var(--text-disabled);
            margin: 0 2px;
        }

        .breadcrumb .current {
            color: var(--text-primary);
            max-width: 240px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .article-content-wrap {
            max-width: 780px;
            margin: 0 auto;
        }

        .article-header {
            padding: 24px 0 16px;
            border-bottom: 1px solid var(--border-glass);
            margin-bottom: 32px;
        }

        .article-header h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: 0.5px;
            background: linear-gradient(90deg, #F2F8FF, #6FD4FF);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 16px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .pill {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            background: var(--accent-soft);
            color: var(--accent);
        }

        .article-content {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-primary);
        }

        .article-content p {
            margin-bottom: 24px;
        }

        .article-content h2 {
            font-size: 22px;
            font-weight: 700;
            margin: 32px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--accent);
            display: block;
            color: var(--text-primary);
            background: none;
            -webkit-text-fill-color: initial;
        }

        .article-content h3 {
            font-size: 18px;
            font-weight: 600;
            margin: 24px 0 12px;
            color: #B8E4FF;
        }

        .article-content blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 20px;
            margin: 24px 0;
            background: rgba(0, 229, 255, 0.04);
            border-radius: 0 12px 12px 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0 24px;
            padding-left: 24px;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content img {
            border-radius: 12px;
            margin: 24px 0;
            box-shadow: var(--shadow-card);
        }

        .article-content a {
            color: var(--accent);
            border-bottom: 1px solid rgba(0, 229, 255, 0.3);
        }

        .article-content a:hover {
            border-bottom-color: var(--accent);
        }

        .not-found {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: blur(18px);
            max-width: 780px;
            margin: 40px auto 0;
        }

        .not-found__icon {
            font-size: 56px;
            margin-bottom: 16px;
        }

        .not-found h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .not-found p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }

        .not-found .btn-back {
            color: var(--accent);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            text-decoration: none;
        }

        .not-found .btn-back:hover {
            text-decoration: underline;
        }

        .related-section {
            margin-top: 56px;
            padding: 48px 32px;
            border-radius: var(--radius-card);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
        }

        .related-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(6, 10, 23, 0.82), rgba(6, 10, 23, 0.94));
            backdrop-filter: blur(2px);
            z-index: 0;
        }

        .related-section>* {
            position: relative;
            z-index: 1;
        }

        .section-title {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(90deg, #F2F8FF, #6FD4FF);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .section-title::before {
            content: '';
            width: 4px;
            height: 20px;
            border-radius: 2px;
            background: var(--accent);
            box-shadow: 0 0 8px rgba(0, 229, 255, 0.6);
            flex-shrink: 0;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: blur(18px);
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
        }

        .related-card__img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }

        .related-card__body {
            padding: 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .related-card__body h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color 0.3s ease;
        }

        .related-card:hover .related-card__body h3 {
            color: var(--accent);
        }

        .related-card__meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .back-entry {
            margin-top: 40px;
        }

        .btn-back-arrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            transition: all 0.3s ease;
            text-decoration: none;
        }

        .btn-back-arrow:hover {
            color: var(--accent);
            text-decoration: none;
        }

        .btn-back-arrow .arrow {
            transition: transform 0.3s ease;
            display: inline-block;
        }

        .btn-back-arrow:hover .arrow {
            transform: translateX(-4px);
        }

        .site-footer {
            background: #030611;
            border-top: 1px solid rgba(128, 218, 255, 0.08);
            padding: 48px 0 24px;
            margin-top: 60px;
        }

        .footer-top {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 40px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand__text {
            font-size: 18px;
            font-weight: 700;
            background: linear-gradient(90deg, #F2F8FF, #6FD4FF);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .footer-desc {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 12px;
            max-width: 360px;
            line-height: 1.6;
        }

        .footer-nav {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }

        .footer-nav a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.3s;
        }

        .footer-nav a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            font-size: 13px;
            color: var(--text-disabled);
            flex-wrap: wrap;
            gap: 12px;
        }

        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: rgba(6, 10, 23, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 200;
            padding: 24px;
            transition: right 0.3s ease;
            flex-direction: column;
        }

        .mobile-drawer.open {
            right: 0;
            display: flex;
        }

        .mobile-drawer__actions {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 24px;
        }

        .mobile-drawer__actions .btn-ghost,
        .mobile-drawer__actions .btn-primary {
            width: 100%;
        }

        .drawer-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 150;
            backdrop-filter: blur(4px);
        }

        .drawer-overlay.show {
            display: block;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid rgba(0, 229, 255, 0.6);
            outline-offset: 2px;
        }

        @media (max-width: 1024px) {
            .header-subtitle {
                display: none;
            }

            .search-box input {
                width: 160px;
            }
        }

        @media (max-width: 768px) {
            .header-top {
                padding: 12px 16px;
            }

            .channel-tabs {
                padding: 8px 16px 12px;
            }

            .search-box {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .article-header h1 {
                font-size: 30px;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .footer-top {
                flex-direction: column;
                gap: 24px;
            }

            .article-main {
                padding: 24px 0 60px;
            }

            .related-section {
                padding: 32px 20px;
            }
        }

        @media (max-width: 520px) {
            .btn-primary {
                padding: 6px 14px;
                font-size: 13px;
            }

            .breadcrumb .current {
                display: none;
            }

            .section-title {
                font-size: 18px;
            }

            .related-card__img {
                height: 140px;
            }
        }