:root{
  --bg:#06080f; --bg2:#0a0e1a;
  --text:#eef2fb; --muted:#9aa6c2; --soft:#c4cde2;
  --line:rgba(140,170,230,.14); --line2:rgba(160,185,240,.26);
  --panel:rgba(18,24,42,.55);
  --blue:#4f8cff; --purple:#a855f7; --cyan:#22d3ee; --pink:#f472b6; --green:#34d399;
  --grad:linear-gradient(120deg,#4f8cff 0%,#a855f7 50%,#22d3ee 100%);
  --grad2:linear-gradient(120deg,#f472b6 0%,#a855f7 60%,#4f8cff 100%);
  --radius:22px; --radius-sm:14px;
}
[data-theme="light"]{
  --bg:#f4f6fd; --bg2:#eef1fb; --text:#0f1530; --muted:#5a6488; --soft:#39426b;
  --line:rgba(60,90,160,.16); --line2:rgba(60,90,160,.3); --panel:rgba(255,255,255,.72);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; min-height:100vh; color:var(--text); background:var(--bg);
  font-family:"Sora","PingFang SC","Microsoft YaHei UI",sans-serif;
  overflow-x:hidden; line-height:1.6;
}
a{color:inherit;text-decoration:none}

/* ===== 动态背景 ===== */
.bg-aurora{position:fixed;inset:0;z-index:-3;overflow:hidden;background:
  radial-gradient(1200px 700px at 50% -10%,rgba(79,140,255,.10),transparent 60%),
  linear-gradient(180deg,var(--bg2),var(--bg) 60%);}
.orb{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;mix-blend-mode:screen}
.orb-1{width:46vw;height:46vw;left:-8vw;top:-6vw;background:radial-gradient(circle,#4f8cff,transparent 65%);animation:float1 22s ease-in-out infinite alternate}
.orb-2{width:40vw;height:40vw;right:-6vw;top:8vh;background:radial-gradient(circle,#a855f7,transparent 65%);animation:float2 26s ease-in-out infinite alternate}
.orb-3{width:38vw;height:38vw;left:24vw;top:60vh;background:radial-gradient(circle,#22d3ee,transparent 65%);animation:float3 30s ease-in-out infinite alternate}
[data-theme="light"] .orb{opacity:.32}
.bg-grid{position:fixed;inset:0;z-index:-2;pointer-events:none;
  background-image:linear-gradient(rgba(140,170,230,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(140,170,230,.06) 1px,transparent 1px);
  background-size:60px 60px;mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000,transparent 75%)}
.spotlight{position:fixed;top:0;left:0;z-index:-1;width:600px;height:600px;margin:-300px 0 0 -300px;pointer-events:none;
  background:radial-gradient(circle,rgba(79,140,255,.10),transparent 60%);transition:transform .12s ease-out}
[data-theme="light"] .spotlight{background:radial-gradient(circle,rgba(79,140,255,.14),transparent 60%)}

@keyframes float1{to{transform:translate(8vw,6vh) scale(1.15)}}
@keyframes float2{to{transform:translate(-7vw,10vh) scale(1.1)}}
@keyframes float3{to{transform:translate(6vw,-8vh) scale(1.18)}}

.container{width:min(1180px,calc(100% - 44px));margin:0 auto}

/* ===== 顶栏 ===== */
.header{position:sticky;top:0;z-index:50;transition:background .3s,border-color .3s,backdrop-filter .3s;border-bottom:1px solid transparent}
.header.scrolled{background:color-mix(in srgb,var(--bg) 72%,transparent);backdrop-filter:blur(16px);border-color:var(--line)}
.header-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:inline-flex;align-items:center;gap:11px;font-weight:800}
.logo-mark{width:36px;height:36px;display:grid;place-items:center;border-radius:11px;color:#fff;font-weight:800;font-size:.8rem;letter-spacing:.04em;background:var(--grad);box-shadow:0 8px 22px rgba(79,140,255,.4)}
.logo-text{letter-spacing:-.02em}.logo-text i{color:var(--muted);font-style:normal;font-weight:600}
.nav{display:flex;gap:26px}
.nav a{color:var(--muted);font-weight:600;font-size:.95rem;position:relative;transition:color .2s}
.nav a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;border-radius:2px;background:var(--grad);transition:width .25s}
.nav a:hover{color:var(--text)}.nav a:hover::after{width:100%}
.header-actions{display:flex;align-items:center;gap:12px}
.theme-toggle{width:40px;height:40px;display:grid;place-items:center;border-radius:11px;border:1px solid var(--line);background:var(--panel);color:var(--text);cursor:pointer;transition:border-color .2s,transform .2s}
.theme-toggle:hover{border-color:var(--line2);transform:translateY(-1px)}
.theme-toggle .ico-sun{display:none}
[data-theme="light"] .theme-toggle .ico-sun{display:block}
[data-theme="light"] .theme-toggle .ico-moon{display:none}
.auth-link{height:38px;display:inline-flex;align-items:center;justify-content:center;padding:0 14px;border-radius:999px;color:var(--soft);font-size:.9rem;font-weight:700;border:1px solid transparent;transition:color .2s,border-color .2s,background .2s,transform .2s}
.auth-link:hover{color:var(--text);border-color:var(--line);background:rgba(255,255,255,.04);transform:translateY(-1px)}
.auth-register{color:#fff;border-color:rgba(79,140,255,.34);background:linear-gradient(120deg,rgba(79,140,255,.2),rgba(168,85,247,.18))}

/* ===== 按钮 ===== */
.primary-btn,.ghost-btn{display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 22px;border-radius:999px;font-weight:700;font-size:.95rem;cursor:pointer;transition:transform .2s,box-shadow .2s,border-color .2s;border:1px solid transparent}
.primary-btn{position:relative;color:#fff;background:var(--grad);background-size:200% 200%;box-shadow:0 12px 30px rgba(79,140,255,.32);overflow:hidden;animation:gradShift 6s ease infinite}
.primary-btn span{position:relative;z-index:1}
.primary-btn:hover{transform:translateY(-2px);box-shadow:0 18px 40px rgba(124,90,247,.45)}
.primary-btn.sm{height:44px}
.ghost-btn{color:var(--text);background:var(--panel);border-color:var(--line);backdrop-filter:blur(8px)}
.ghost-btn:hover{border-color:var(--line2);transform:translateY(-2px)}
.ghost-btn.lg{height:48px}
@keyframes gradShift{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}

/* ===== Hero ===== */
.hero{position:relative;padding:88px 0 64px;text-align:center}
.hero-inner{max-width:840px;margin:0 auto}
.eyebrow{display:inline-block;margin:0 0 22px;padding:8px 16px;border-radius:999px;border:1px solid var(--line);background:var(--panel);color:var(--cyan);font-family:"JetBrains Mono",monospace;font-size:.78rem;letter-spacing:.08em;backdrop-filter:blur(8px)}
.hero h1{margin:0;font-size:clamp(2.6rem,6.4vw,5rem);line-height:1.08;font-weight:800;letter-spacing:.01em}
.hero-title{display:grid;justify-items:center;gap:8px}
.title-line{display:block;font-family:"Sora","PingFang SC","Microsoft YaHei UI",sans-serif;text-transform:uppercase}
.title-bottom{position:relative;padding-bottom:12px}
.title-bottom::after{content:"";position:absolute;left:50%;bottom:0;width:min(420px,72vw);height:4px;border-radius:999px;background:var(--grad);background-size:220% 100%;transform:translateX(-50%);box-shadow:0 0 28px rgba(79,140,255,.55);animation:titleBeam 4s ease infinite}
.title-motion{position:relative;display:grid;place-items:center;width:min(760px,92vw);height:1.18em;overflow:hidden;border-radius:22px;background:linear-gradient(120deg,rgba(79,140,255,.14),rgba(168,85,247,.14),rgba(34,211,238,.12));border:1px solid var(--line);box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 18px 60px rgba(79,140,255,.18)}
.title-motion::before{content:"";position:absolute;inset:-40% -12%;background:linear-gradient(110deg,transparent 20%,rgba(255,255,255,.26) 46%,transparent 72%);transform:translateX(-85%) rotate(6deg);animation:titleSweep 3.6s ease-in-out infinite;pointer-events:none}
.title-motion span{grid-area:1 / 1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;background-size:220% auto;animation:titleWords 8s cubic-bezier(.22,1,.36,1) infinite,gradShift 5s ease infinite;opacity:0;transform:translateY(72%) scale(.96);filter:blur(10px);white-space:nowrap}
.title-motion span:nth-child(2){animation-delay:2s,0s}
.title-motion span:nth-child(3){animation-delay:4s,0s}
.title-motion span:nth-child(4){animation-delay:6s,0s}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;background-size:200% auto;animation:gradShift 5s ease infinite}
.grad-2{background:var(--grad2);-webkit-background-clip:text;background-clip:text;color:transparent;background-size:200% auto;animation:gradShift 5s ease infinite .4s}
.hero-copy{max-width:620px;margin:24px auto 0;color:var(--soft);font-size:clamp(1rem,1.3vw,1.12rem)}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:32px}
.stats{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:48px}
.stat{display:flex;flex-direction:column;gap:4px;min-width:96px}
.stat b{font-size:clamp(1.8rem,3vw,2.5rem);font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat b i{font-style:normal;font-size:.6em}
.stat span{color:var(--muted);font-size:.84rem;font-weight:600}
.stat-divider{width:1px;height:40px;background:var(--line2)}
.scroll-hint{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);width:24px;height:38px;border:2px solid var(--line2);border-radius:14px}
.scroll-hint span{position:absolute;left:50%;top:8px;width:4px;height:7px;margin-left:-2px;border-radius:2px;background:var(--cyan);animation:scrollDot 1.6s ease infinite}
@keyframes scrollDot{0%{opacity:0;transform:translateY(0)}40%{opacity:1}80%,100%{opacity:0;transform:translateY(12px)}}
@keyframes titleWords{
  0%,6%{opacity:0;transform:translateY(72%) scale(.96);filter:blur(10px)}
  10%,22%{opacity:1;transform:translateY(0) scale(1);filter:blur(0)}
  26%,100%{opacity:0;transform:translateY(-72%) scale(.96);filter:blur(10px)}
}
@keyframes titleSweep{
  0%,38%{transform:translateX(-85%) rotate(6deg)}
  68%,100%{transform:translateX(85%) rotate(6deg)}
}
@keyframes titleBeam{0%,100%{background-position:0% 50%;opacity:.78}50%{background-position:100% 50%;opacity:1}}

/* ===== Section ===== */
.section{padding:90px 0}
.section-head{text-align:center;max-width:680px;margin:0 auto 44px}
.section-label{margin:0;color:var(--cyan);font-family:"JetBrains Mono",monospace;font-size:.8rem;letter-spacing:.12em;text-transform:uppercase}
.section h2{margin:12px 0 0;font-size:clamp(2rem,4vw,3.2rem);font-weight:800;letter-spacing:-.03em}
.section-sub{margin:14px 0 0;color:var(--muted)}

/* ===== 筛选 ===== */
.filters{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:34px}
.filter{padding:9px 18px;border-radius:999px;border:1px solid var(--line);background:var(--panel);color:var(--muted);font-weight:600;font-size:.88rem;cursor:pointer;transition:.2s;backdrop-filter:blur(8px)}
.filter:hover{color:var(--text);border-color:var(--line2)}
.filter.active{color:#fff;background:var(--grad);border-color:transparent;box-shadow:0 8px 22px rgba(79,140,255,.3)}

/* ===== 应用卡片 ===== */
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.app-card{position:relative;padding:24px;border-radius:var(--radius);border:1px solid var(--line);background:var(--panel);backdrop-filter:blur(14px);transition:transform .18s ease,border-color .25s;transform-style:preserve-3d;overflow:hidden;transition-delay:var(--d)}
.app-card:hover{border-color:var(--line2)}
.card-glow{position:absolute;inset:0;border-radius:inherit;opacity:0;transition:opacity .3s;pointer-events:none;background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),rgba(124,140,255,.16),transparent 45%)}
.app-card:hover .card-glow{opacity:1}
.card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.app-icon{width:52px;height:52px;display:grid;place-items:center;font-size:1.7rem;border-radius:15px;border:1px solid var(--line);background:linear-gradient(160deg,rgba(124,140,255,.16),rgba(124,140,255,.02));box-shadow:inset 0 1px 0 rgba(255,255,255,.06)}
.star-pill{display:inline-flex;align-items:center;gap:5px;padding:6px 11px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--soft);font-family:"JetBrains Mono",monospace;font-size:.8rem;font-weight:600}
.star-pill svg{color:#fbbf24}
.app-card h3{margin:0;font-size:1.3rem;font-weight:800;letter-spacing:-.02em}
.app-en{margin:4px 0 0;color:var(--cyan);font-family:"JetBrains Mono",monospace;font-size:.76rem}
.app-desc{margin:14px 0 0;color:var(--soft);font-size:.92rem;min-height:70px}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 20px}
.tag{padding:5px 11px;border-radius:8px;font-size:.74rem;font-weight:600;color:var(--tc);border:1px solid color-mix(in srgb,var(--tc) 36%,transparent);background:color-mix(in srgb,var(--tc) 12%,transparent)}

/* ===== Downloads ===== */
.downloads-section{padding-top:40px}
.download-vault{display:grid;grid-template-columns:.9fr 1.1fr;gap:26px;align-items:stretch;padding:32px;border-radius:30px;border:1px solid var(--line);background:var(--panel);backdrop-filter:blur(14px);box-shadow:0 30px 80px rgba(0,0,0,.24);position:relative;overflow:hidden}
.download-vault::before{content:"";position:absolute;inset:0;background:radial-gradient(680px circle at 12% 0%,rgba(79,140,255,.14),transparent 58%);pointer-events:none}
.download-copy,.download-gate,.download-panel{position:relative}
.download-copy h2{margin:12px 0 14px}
.download-gate{align-self:center;padding:22px;border-radius:var(--radius);border:1px solid var(--line);background:rgba(255,255,255,.035)}
.download-gate label{display:block;margin-bottom:10px;color:var(--soft);font-weight:700}
.gate-row{display:grid;grid-template-columns:1fr auto;gap:10px}
.gate-row input{min-width:0;height:44px;padding:0 14px;border-radius:14px;border:1px solid var(--line);outline:none;color:var(--text);background:rgba(255,255,255,.05);font:inherit}
.gate-row input:focus{border-color:var(--line2);box-shadow:0 0 0 4px rgba(79,140,255,.12)}
.gate-message{min-height:22px;margin:10px 0 0;color:var(--pink);font-size:.86rem}
.download-panel{grid-column:1 / -1;padding:24px;border-radius:var(--radius);border:1px solid var(--line);background:rgba(255,255,255,.035)}
.download-panel-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px}
.download-panel-head h3{margin:6px 0 0;font-size:1.45rem}
.vault-lock{height:40px;padding:0 16px}
.private-download-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.private-download-card,.empty-download{padding:18px;border-radius:18px;border:1px solid var(--line);background:rgba(255,255,255,.04)}
.private-download-card{display:flex;align-items:center;justify-content:space-between;gap:14px}
.private-download-card h4{margin:2px 0 6px;font-size:1.05rem}
.private-download-card p,.empty-download p{margin:0;color:var(--muted);font-size:.9rem}
.download-version{color:var(--cyan)!important;font-family:"JetBrains Mono",monospace;font-size:.75rem}
.empty-download{grid-column:1 / -1;text-align:center}
.empty-download b{display:block;margin-bottom:6px;font-size:1.05rem}

/* ===== About ===== */
.about-inner{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.about-copy h2{margin:12px 0 18px}
.about-copy p{color:var(--soft);margin:0 0 14px}
.about-actions{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}
.about-card .terminal{border-radius:var(--radius);border:1px solid var(--line);background:rgba(8,12,22,.85);overflow:hidden;box-shadow:0 30px 70px rgba(0,0,0,.4)}
.term-bar{display:flex;align-items:center;gap:8px;padding:13px 16px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.03)}
.term-bar i{width:12px;height:12px;border-radius:50%}
.term-bar i:nth-child(1){background:#ff5f57}.term-bar i:nth-child(2){background:#febc2e}.term-bar i:nth-child(3){background:#28c840}
.term-bar span{margin-left:8px;color:var(--muted);font-family:"JetBrains Mono",monospace;font-size:.78rem}
.terminal pre{margin:0;padding:20px;overflow:auto}
.terminal code{font-family:"JetBrains Mono",monospace;font-size:.86rem;line-height:1.9;color:#dbe4f7;white-space:pre-wrap}
.c-pink{color:var(--pink)}.c-cyan{color:var(--cyan)}.c-green{color:var(--green)}
.cursor{animation:blink 1.1s step-end infinite}
@keyframes blink{50%{opacity:0}}

/* ===== Contact ===== */
.contact-card{text-align:center;padding:54px 32px;border-radius:30px;border:1px solid var(--line);background:var(--panel);backdrop-filter:blur(14px);box-shadow:0 30px 80px rgba(0,0,0,.3);position:relative;overflow:hidden}
.contact-card::before{content:"";position:absolute;inset:0;background:radial-gradient(600px circle at 50% 0%,rgba(124,140,255,.14),transparent 60%);pointer-events:none}
.contact-card .section-label,.contact-card h2,.contact-card .section-sub{position:relative}
.contact-grid{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:34px}
.contact-item{display:flex;flex-direction:column;align-items:center;gap:6px;padding:24px 16px;border-radius:var(--radius);border:1px solid var(--line);background:rgba(255,255,255,.03);transition:transform .2s,border-color .2s}
.contact-item:hover{transform:translateY(-3px);border-color:var(--line2)}
.ci-ico{width:46px;height:46px;display:grid;place-items:center;font-size:1.3rem;border-radius:13px;background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(79,140,255,.32)}
.contact-item b{font-size:1rem}.contact-item em{font-style:normal;color:var(--muted);font-family:"JetBrains Mono",monospace;font-size:.82rem;word-break:break-all}

/* ===== Footer ===== */
.footer{padding:40px 0;border-top:1px solid var(--line);margin-top:40px}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-inner p{margin:0;color:var(--muted);font-size:.88rem}

/* ===== reveal ===== */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .app-grid{grid-template-columns:repeat(2,1fr)}
  .about-inner{grid-template-columns:1fr;gap:28px}
  .download-vault{grid-template-columns:1fr}
  .private-download-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .nav{display:none}
}
@media(max-width:600px){
  .app-grid{grid-template-columns:1fr}
  .app-desc{min-height:0}
  .stats{gap:4px}.stat{min-width:78px}
  .header-actions{gap:8px}
  .auth-link{height:36px;padding:0 11px;font-size:.84rem}
  .gate-row{grid-template-columns:1fr}
  .download-vault{padding:22px}
  .download-panel-head,.private-download-card{align-items:flex-start;flex-direction:column}
  .hero{padding:60px 0 48px}
  .section{padding:64px 0}
  .ghost-btn.lg{display:none}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition-duration:.01ms!important}}