/* ===== Clash - 开源代理工具·终端极客风 ===== */
:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --bg3: #21262d;
  --card: #161b22;
  --card-hover: #1c2128;
  --border: #30363d;
  --border-light: #21262d;
  --text: #e6edf3;
  --text2: #8b949e;
  --text3: #6e7681;
  --blue: #58a6ff;
  --blue2: #1f6feb;
  --indigo: #7c7cf8;
  --violet: #bc8cff;
  --grad: linear-gradient(135deg, #58a6ff, #7c7cf8, #bc8cff);
  --grad-hero: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(88,166,255,0.06) 0%, transparent 60%);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
  --trans: 0.28s cubic-bezier(0.4,0,0.2,1);
  --mono: "SF Mono","Fira Code","Cascadia Code","JetBrains Mono",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}

/* Nav */
.nav-bar{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(13,17,23,0.88);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  max-width:1240px;margin:0 auto;padding:0 32px;height:64px;
  display:flex;align-items:center;justify-content:space-between;
}
.nav-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:-0.3px}
.nav-brand .brand-icon{
  width:34px;height:34px;border-radius:8px;
  background:var(--grad);display:grid;place-items:center;
  font-family:var(--mono);font-size:16px;font-weight:900;color:#fff
}
.nav-brand .accent{background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{padding:8px 16px;border-radius:6px;font-size:13px;font-weight:500;color:var(--text2);transition:all var(--trans)}
.nav-menu a:hover{color:var(--text);background:var(--bg2)}
.nav-menu a.btn-nav{
  background:linear-gradient(135deg,#238636,#2ea043);color:#fff;font-weight:600;
  border-radius:6px;padding:8px 18px;display:flex;align-items:center;gap:6px
}
.nav-menu a.btn-nav:hover{background:linear-gradient(135deg,#2ea043,#3fb950);transform:translateY(-1px)}
.nav-toggle{display:none;background:none;border:none;color:var(--text);font-size:24px;cursor:pointer}

/* Hero */
.hero{
  padding:152px 0 80px;position:relative;overflow:hidden;
  background:var(--grad-hero);
}
.hero::after{
  content:'';position:absolute;bottom:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--border),transparent);
}
.hero-grid{
  max-width:1240px;margin:0 auto;padding:0 32px;
  display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center;
  position:relative;z-index:1
}
.hero-text .tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:4px 14px;border-radius:6px;
  background:rgba(88,166,255,0.08);border:1px solid rgba(88,166,255,0.15);
  color:var(--blue);font-size:11px;font-weight:700;font-family:var(--mono);letter-spacing:0.5px;
  margin-bottom:24px
}
.hero-text .tag::before{content:">";opacity:0.5}
.hero-text h1{font-size:clamp(34px,5vw,54px);font-weight:900;line-height:1.06;letter-spacing:-1px;margin-bottom:20px}
.hero-text h1 .hl{background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-text .desc{font-size:15px;color:var(--text3);line-height:1.8;margin-bottom:32px;max-width:460px}
.hero-btns{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.hero-btns .ver{font-size:11px;color:var(--text3);margin-left:8px;font-family:var(--mono)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:6px;font-size:13px;font-weight:600;cursor:pointer;transition:all var(--trans);border:1px solid transparent;white-space:nowrap}
.btn-fill{background:var(--grad);color:#fff;box-shadow:0 4px 18px rgba(88,166,255,0.25)}
.btn-fill:hover{transform:translateY(-1px);box-shadow:0 8px 28px rgba(88,166,255,0.4)}
.btn-line{background:transparent;color:var(--text);border-color:var(--border)}
.btn-line:hover{border-color:var(--blue);color:var(--blue)}
.btn-muted{background:var(--bg2);color:var(--text);border-color:var(--border)}
.btn-muted:hover{background:var(--bg3)}

/* Terminal mockup */
.term-visual{position:relative}
.term-window{
  background:#0d1117;border:1px solid var(--border);
  border-radius:10px;overflow:hidden;box-shadow:0 0 0 1px rgba(88,166,255,0.08),var(--shadow-lg)
}
.term-top{
  padding:10px 14px;background:var(--bg3);
  display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--border)
}
.term-dot{width:10px;height:10px;border-radius:50%}
.term-dot.r{background:#ff5f56}.term-dot.y{background:#ffbd2e}.term-dot.g{background:#27c93f}
.term-top span{font-size:11px;color:var(--text3);font-family:var(--mono);margin-left:6px}
.term-body{padding:18px 16px;font-family:var(--mono);font-size:12px;line-height:1.8}
.term-body .t-cmd{color:var(--blue)}
.term-body .t-arg{color:var(--violet)}
.term-body .t-out{color:var(--text2)}
.term-body .t-ok{color:#3fb950}
.term-body .t-num{color:#d2a8ff}
.term-badge{
  position:absolute;bottom:-12px;right:-16px;
  background:var(--card);border:1px solid var(--border);
  border-radius:8px;padding:10px 16px;box-shadow:var(--shadow);
  font-family:var(--mono);font-size:11px;display:flex;align-items:center;gap:8px
}
.term-badge .tb-dot{width:7px;height:7px;background:#3fb950;border-radius:50%;animation:pulse-dot 2s infinite}
@keyframes pulse-dot{0%,100%{opacity:1}50%{opacity:0.3}}
.term-badge strong{color:var(--blue)}

/* Stats */
.hl-strip{
  max-width:1240px;margin:0 auto;padding:0 32px 80px;position:relative;z-index:1
}
.hl-inner{
  background:var(--bg2);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px 40px;
  display:flex;align-items:center;justify-content:center;gap:48px;flex-wrap:wrap
}
.hl-inner .hi{text-align:center}
.hi .hin{font-size:28px;font-weight:900;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-family:var(--mono)}
.hi .hil{font-size:11px;color:var(--text3);margin-top:4px;font-family:var(--mono)}
.hl-inner .hi-div{width:1px;height:36px;background:var(--border)}

/* Sections */
.sec{max-width:1240px;margin:0 auto;padding:80px 32px}
.sec-head{text-align:center;margin-bottom:56px}
.sec-head .label{
  display:inline-block;padding:4px 14px;border-radius:6px;
  background:rgba(88,166,255,0.06);border:1px solid rgba(88,166,255,0.12);
  color:var(--blue);font-size:11px;font-weight:700;font-family:var(--mono);
  letter-spacing:0.5px;margin-bottom:16px
}
.sec-head h2{font-size:clamp(28px,4vw,40px);font-weight:800;letter-spacing:-0.5px;margin-bottom:12px}
.sec-head p{color:var(--text3);font-size:15px;max-width:520px;margin:0 auto}

/* Features grid - 1px gap border merge */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.feat-card{
  background:var(--bg);padding:32px 26px;
  transition:all var(--trans);position:relative
}
.feat-card:hover{background:var(--bg2)}
.feat-card .fc-icon{
  width:40px;height:40px;border-radius:8px;
  background:rgba(88,166,255,0.06);display:grid;place-items:center;
  font-size:20px;margin-bottom:16px
}
.feat-card h3{font-size:15px;font-weight:700;margin-bottom:8px}
.feat-card p{font-size:12px;color:var(--text3);line-height:1.7;font-family:var(--mono)}

/* Protocol section */
.proto-sec{background:var(--bg2);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.proto-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.proto-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px 20px;text-align:center;
  transition:all var(--trans)
}
.proto-card:hover{border-color:var(--blue);transform:translateY(-2px);box-shadow:0 4px 20px rgba(88,166,255,0.1)}
.proto-card .pi{font-size:30px;margin-bottom:10px;display:block}
.proto-card h3{font-size:14px;font-weight:700;font-family:var(--mono);margin-bottom:4px}
.proto-card p{font-size:11px;color:var(--text3);font-family:var(--mono)}

/* Platform */
.plat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.plat-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px 20px;text-align:center;
  transition:all var(--trans)
}
.plat-card:hover{border-color:var(--border-light);transform:translateY(-2px);box-shadow:0 4px 20px rgba(0,0,0,0.25)}
.plat-card .pi{font-size:34px;margin-bottom:10px;display:block}
.plat-card h3{font-size:14px;font-weight:700;margin-bottom:4px}
.plat-card p{font-size:11px;color:var(--text3)}

/* Comparison */
.cmp-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cmp-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:32px 26px;
  transition:all var(--trans);position:relative;overflow:hidden
}
.cmp-card.popular{border-color:var(--blue);box-shadow:0 0 0 1px rgba(88,166,255,0.15)}
.cmp-card .pop-tag{
  position:absolute;top:14px;right:14px;padding:3px 12px;border-radius:4px;
  background:linear-gradient(135deg,#238636,#2ea043);color:#fff;font-size:10px;font-weight:700;font-family:var(--mono)
}
.cmp-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.cmp-card .cmp-price{font-size:30px;font-weight:900;margin-bottom:4px;font-family:var(--mono)}
.cmp-card .cmp-unit{font-size:13px;color:var(--text3);font-weight:400}
.cmp-card p{font-size:12px;color:var(--text3);margin-bottom:14px}
.cmp-list{list-style:none;margin-bottom:20px}
.cmp-list li{padding:7px 0;font-size:12px;color:var(--text2);display:flex;align-items:center;gap:8px}
.cmp-list li::before{content:'✓';color:#3fb950;font-weight:700}
.cmp-card .btn{width:100%;justify-content:center}

/* FAQ */
.faq-wrap{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:8px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}
.faq-q{
  width:100%;padding:18px 22px;background:none;border:none;
  color:var(--text);font-size:14px;font-weight:600;text-align:left;
  cursor:pointer;display:flex;justify-content:space-between;align-items:center;
  font-family:inherit
}
.faq-q .arrow{font-size:10px;color:var(--blue);transition:transform var(--trans);font-family:var(--mono)}
.faq-a{padding:0 22px 18px;font-size:13px;color:var(--text3);line-height:1.8;display:none}
.faq-item.open .faq-a{display:block}
.faq-item.open .arrow{transform:rotate(180deg)}

/* CTA */
.cta-box{
  background:linear-gradient(135deg,rgba(88,166,255,0.08),rgba(188,140,255,0.05));
  border:1px solid var(--border);border-radius:var(--radius);
  padding:64px 48px;text-align:center
}
.cta-box h2{font-size:clamp(28px,4vw,36px);font-weight:800;margin-bottom:12px}
.cta-box p{color:var(--text3);font-size:15px;margin-bottom:30px}
.cta-box .cta-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* Footer */
.footer{background:var(--bg2);border-top:1px solid var(--border)}
.footer-grid{
  max-width:1240px;margin:0 auto;padding:56px 32px 28px;
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px
}
.footer-brand .fl{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800;margin-bottom:12px}
.footer-brand .fl .ficon{
  width:28px;height:28px;background:var(--grad);border-radius:6px;
  display:grid;place-items:center;color:#fff;font-size:13px;font-family:var(--mono);font-weight:900
}
.footer-brand .fl .fc{background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.footer-brand p{font-size:12px;color:var(--text3);line-height:1.7;max-width:270px}
.footer-col h4{font-size:13px;font-weight:700;margin-bottom:16px}
.footer-col a{display:block;font-size:12px;color:var(--text3);padding:5px 0;transition:color var(--trans)}
.footer-col a:hover{color:var(--blue)}
.footer-bottom{
  max-width:1240px;margin:0 auto;padding:18px 32px;
  border-top:1px solid var(--border);
  display:flex;justify-content:space-between;font-size:11px;color:var(--text3);font-family:var(--mono);
  flex-wrap:wrap;gap:12px
}

/* Download page */
.dl-hero{padding:132px 0 56px;text-align:center;background:var(--grad-hero)}
.dl-hero-inner{max-width:760px;margin:0 auto;padding:0 32px}
.dl-hero-inner h1{font-size:clamp(30px,5vw,44px);font-weight:900;margin-bottom:12px}
.dl-hero-inner .dl-sub{color:var(--text3);font-size:14px;margin-bottom:18px}
.dl-meta{display:inline-flex;gap:18px;font-size:12px;color:var(--text2);flex-wrap:wrap;font-family:var(--mono)}
.dl-grid{max-width:1240px;margin:0 auto 56px;padding:0 32px;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.dl-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:32px 24px;text-align:center;
  transition:all var(--trans);display:flex;flex-direction:column;gap:12px
}
.dl-card:hover{border-color:var(--blue);transform:translateY(-2px);box-shadow:0 8px 28px rgba(88,166,255,0.12)}
.dl-card .dl-tag{display:inline-block;padding:3px 12px;border-radius:4px;font-size:11px;font-weight:700;font-family:var(--mono);background:rgba(88,166,255,0.08);color:var(--blue);align-self:center}
.dl-card h3{font-size:17px;font-weight:700}
.dl-card .dl-info{font-size:12px;color:var(--text3);line-height:1.6}
.dl-card .dl-size{font-size:11px;color:var(--text3);font-family:var(--mono)}
.dl-tips{max-width:1240px;margin:0 auto 56px;padding:0 32px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.dl-tips .tp{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:22px 18px;display:flex;gap:14px;align-items:flex-start}
.tp .tp-num{width:28px;height:28px;border-radius:6px;background:rgba(88,166,255,0.08);color:var(--blue);display:grid;place-items:center;font-size:13px;font-weight:800;font-family:var(--mono);flex-shrink:0}
.tp strong{display:block;font-size:13px;margin-bottom:4px}
.tp p{font-size:11px;color:var(--text3);line-height:1.6}

.specs-tbl{max-width:760px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.specs-tbl .sr{display:grid;grid-template-columns:150px 1fr;border-bottom:1px solid var(--border)}
.specs-tbl .sr:last-child{border-bottom:none}
.specs-tbl .sl{padding:14px 18px;background:var(--bg2);font-size:12px;font-weight:700;color:var(--blue);font-family:var(--mono)}
.specs-tbl .sv{padding:14px 18px;font-size:12px;color:var(--text2)}

/* 404 */
.err-wrap{min-height:100vh;display:grid;place-items:center;padding:32px;background:var(--bg)}
.err-card{
  max-width:480px;text-align:center;
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:60px 48px;box-shadow:var(--shadow-lg)
}
.err-card .err-num{font-size:clamp(90px,16vw,140px);font-weight:900;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:0.9;margin-bottom:8px;font-family:var(--mono)}
.err-card h1{font-size:20px;font-weight:700;margin-bottom:12px}
.err-card p{color:var(--text3);font-size:13px;line-height:1.7;margin-bottom:28px}
.err-card .err-btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .plat-row,.proto-row{grid-template-columns:repeat(2,1fr)}
  .cmp-row{grid-template-columns:1fr;max-width:400px;margin:0 auto}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-menu{display:none}
  .nav-toggle{display:block}
  .nav-menu.open{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:var(--bg2);border-bottom:1px solid var(--border);padding:12px 24px;gap:4px;z-index:99}
  .hero{padding:120px 0 50px}
  .feat-grid{grid-template-columns:1fr}
  .plat-row,.proto-row{grid-template-columns:1fr;max-width:320px;margin:0 auto}
  .dl-grid,.dl-tips{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .sec{padding:52px 20px}
  .cta-box{padding:44px 24px}
}