/* sorvian.io 主页 r0（claude-home-20261102-r0）— 深色国际风，品牌蓝 + 银，学院区块用暖色 */
:root{--bg:#060b1d;--bg2:#0a1230;--panel:rgba(255,255,255,.045);--line:rgba(160,190,255,.16);--ink:#eef3ff;--muted:#a9b6d6;--blue:#3d8bff;--cyan:#38d6ff;--violet:#8a5cff;--warm:#ffb04a;--grad:linear-gradient(110deg,#38d6ff 0%,#3d8bff 40%,#8a5cff 100%);--grad-warm:linear-gradient(110deg,#3d8bff 0%,#8a5cff 50%,#ffb04a 100%);--radius:22px;--ease:cubic-bezier(.2,.7,.2,1)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Inter","Segoe UI",system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;line-height:1.6;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px;border-radius:8px}
html[data-lang="zh"] .en,html[data-lang="en"] .zh{display:none}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-999px;top:8px;background:#fff;color:#000;padding:8px 12px;border-radius:8px;z-index:100}
.skip:focus{left:8px}

/* 导航 */
.nav{position:fixed;inset:0 0 auto;z-index:50;transition:background .3s,border-color .3s,backdrop-filter .3s;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(6,11,29,.78);backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);border-color:var(--line)}
.nav-row{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;letter-spacing:.18em;font-size:16px}
.brand img{width:40px;height:40px}
.nav-links{display:flex;gap:2px;margin-left:auto}
.nav-links a{text-decoration:none;color:var(--muted);font-size:15px;padding:8px 13px;border-radius:999px;transition:color .2s,background .2s}
.nav-links a:hover{color:var(--ink);background:var(--panel)}
.nav-act{display:flex;align-items:center;gap:12px}
.lang{display:flex;border:1px solid var(--line);border-radius:999px;padding:3px}
.lang a{text-decoration:none;font-size:13px;font-weight:600;color:var(--muted);padding:5px 10px;border-radius:999px;min-height:32px;display:inline-flex;align-items:center}
.lang a[aria-current="true"]{background:rgba(255,255,255,.12);color:var(--ink)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;padding:0 24px;border-radius:999px;font-weight:700;font-size:16px;text-decoration:none;transition:transform .25s var(--ease),box-shadow .25s,background .25s;will-change:transform}
.btn b{transition:transform .25s var(--ease)}
.btn:hover{transform:translateY(-2px)}
.btn:hover b{transform:translateX(4px)}
.btn-primary{background:var(--grad);color:#04102b;box-shadow:0 10px 30px rgba(61,139,255,.35)}
.btn-primary:hover{box-shadow:0 14px 40px rgba(61,139,255,.5)}
.btn-warm{background:var(--grad-warm);color:#fff;box-shadow:0 10px 30px rgba(138,92,255,.35)}
.btn-glass{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);color:var(--ink)}
.btn-glass:hover{background:rgba(255,255,255,.12)}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px}
.cta{display:flex;flex-wrap:wrap;gap:12px}
.cta.center{justify-content:center;margin-top:36px}

/* 首屏 */
.hero{position:relative;overflow:hidden;padding:136px 0 56px;isolation:isolate}
.hero-bg{position:absolute;inset:0;z-index:-1;background:radial-gradient(1200px 600px at 70% 10%,#102a6b 0%,transparent 60%),radial-gradient(900px 500px at 10% 30%,#22104d 0%,transparent 60%),var(--bg)}
.orb{position:absolute;border-radius:50%;filter:blur(60px);opacity:.55;animation:float 14s ease-in-out infinite}
.o1{width:420px;height:420px;background:#1f6bff;top:-80px;right:8%}
.o2{width:320px;height:320px;background:#7a3cff;top:40%;left:-80px;animation-delay:-5s}
.o3{width:260px;height:260px;background:#00c2ff;bottom:-60px;right:30%;opacity:.35;animation-delay:-9s}
.grid-floor{position:absolute;left:-20%;right:-20%;bottom:-10%;height:55%;background-image:linear-gradient(rgba(120,170,255,.16) 1px,transparent 1px),linear-gradient(90deg,rgba(120,170,255,.16) 1px,transparent 1px);background-size:56px 56px;transform:perspective(600px) rotateX(62deg);transform-origin:bottom;mask-image:linear-gradient(to top,#000 10%,transparent 85%);-webkit-mask-image:linear-gradient(to top,#000 10%,transparent 85%);animation:grid 18s linear infinite}
.stars{position:absolute;inset:0;background-image:radial-gradient(1.5px 1.5px at 12% 18%,#fff8,transparent),radial-gradient(1px 1px at 32% 8%,#fff9,transparent),radial-gradient(1.5px 1.5px at 58% 22%,#fff6,transparent),radial-gradient(1px 1px at 78% 12%,#fffa,transparent),radial-gradient(1.5px 1.5px at 88% 38%,#fff7,transparent),radial-gradient(1px 1px at 22% 44%,#fff6,transparent),radial-gradient(1px 1px at 46% 36%,#fff8,transparent);animation:twinkle 6s ease-in-out infinite}
@keyframes float{50%{transform:translate(30px,-24px) scale(1.06)}}
@keyframes grid{to{background-position:0 56px,0 0}}
@keyframes twinkle{50%{opacity:.5}}
.hero-grid{display:grid;grid-template-columns:1fr 1.08fr;gap:48px;align-items:center}
.eyebrow{display:inline-block;margin:0 0 18px;font-size:13px;font-weight:700;letter-spacing:.32em;color:var(--cyan);padding:6px 14px;border:1px solid rgba(56,214,255,.35);border-radius:999px;background:rgba(56,214,255,.06)}
h1{font-size:clamp(40px,5.6vw,72px);line-height:1.06;letter-spacing:-.02em;margin:0 0 22px;font-weight:800}
h1,h2,h3{text-wrap:balance}
html[data-lang="zh"] h1{font-size:clamp(36px,4.4vw,60px);line-height:1.14}
h1 em,h2 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:19px;color:var(--muted);max-width:33em;margin:0 0 30px}
.hero-note{font-size:14px;color:var(--muted);margin:16px 0 0;opacity:.85}
.hero-note .mall-name{display:block;margin-bottom:4px;color:var(--cyan);font-weight:700;letter-spacing:.04em}
figure{margin:0;position:relative}
.hero-art{border-radius:28px;padding:1px;background:linear-gradient(140deg,rgba(56,214,255,.6),rgba(138,92,255,.25) 40%,rgba(255,255,255,.08));box-shadow:0 30px 80px rgba(20,60,200,.35);transition:transform .2s linear}
.hero-art img{border-radius:27px}
.ai-tag{position:absolute;right:14px;bottom:14px;font-size:12px;font-weight:700;color:#fff;background:rgba(4,10,30,.72);border:1px solid rgba(255,255,255,.2);padding:4px 10px;border-radius:999px;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:64px}
.stat{padding:18px 20px;border:1px solid var(--line);border-radius:18px;background:var(--panel);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.stat b{display:block;font-size:38px;line-height:1.1;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-variant-numeric:tabular-nums}
.stat>span{font-size:14px;color:var(--muted)}

/* 区块 */
.sec{padding:110px 0;position:relative}
.sec-alt{background:linear-gradient(180deg,var(--bg) 0,var(--bg2) 50%,var(--bg) 100%)}
.sec-head{max-width:760px;margin-bottom:44px}
.kicker{margin:0 0 12px;font-size:13px;font-weight:700;letter-spacing:.24em;text-transform:uppercase;color:var(--cyan)}
.kicker-warm{color:var(--warm)}
h2{font-size:clamp(30px,3.8vw,48px);line-height:1.14;letter-spacing:-.015em;margin:0 0 16px;font-weight:800}
.sub{font-size:18px;color:var(--muted);margin:0 0 24px;max-width:40em}
.small-note{font-size:13px;color:var(--muted);opacity:.85;margin:14px 0 22px}

.brand i{font-style:normal;font-weight:600;letter-spacing:.08em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* 业务总入口 */
.sec-tight{padding-top:80px;padding-bottom:40px}
.ways{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.way{position:relative;display:flex;flex-direction:column;gap:6px;text-decoration:none;border:1px solid var(--line);border-radius:var(--radius);padding:24px 24px 22px;background:var(--panel);overflow:hidden;isolation:isolate;transition:transform .35s var(--ease),border-color .3s}
.way::before{content:"";position:absolute;inset:auto -30% -60% auto;width:240px;height:240px;border-radius:50%;filter:blur(50px);opacity:.35;z-index:-1;transition:opacity .35s}
.w-blue::before{background:#2f6bff}.w-warm::before{background:#ff9a1f}.w-violet::before{background:#8a5cff}.w-cyan::before{background:#22c8ff}.w-green::before{background:#22c55e}.w-silver::before{background:#9fb2d6}
.way:hover{transform:translateY(-4px);border-color:rgba(56,214,255,.45)}
.way:hover::before{opacity:.6}
.way-ic{font-size:28px;line-height:1}
.way h3{margin:8px 0 0;font-size:21px}
.way p{margin:0;color:var(--muted);font-size:15px;flex:1}
.way-go{margin-top:10px;font-size:14px;font-weight:700;color:var(--cyan)}

/* 最新上线 bento */
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{position:relative;display:block;border-radius:var(--radius);overflow:hidden;text-decoration:none;border:1px solid var(--line);background:#0b1430;aspect-ratio:4/3;isolation:isolate;transition:transform .4s var(--ease),border-color .3s,box-shadow .4s}
.card.c-wide{grid-column:span 2;aspect-ratio:auto}
.card.c-full{grid-column:1/-1;aspect-ratio:auto;min-height:300px}
.card.c-full{background:linear-gradient(120deg,#0d1a44,#120c33)}
.card.c-full img{left:auto;width:62%;object-position:left 20%;-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 22%);mask-image:linear-gradient(90deg,transparent 0,#000 22%)}
.card.c-full::after{display:none}
.card.c-full .card-txt{right:auto;top:0;width:42%;padding:32px 36px;display:flex;flex-direction:column;justify-content:center;align-items:flex-start}
.card.c-full h3{font-size:26px}
.card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease)}
.card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 35%,rgba(4,9,26,.92) 100%);z-index:0}
.card-txt{position:absolute;left:0;right:0;bottom:0;padding:22px 24px;z-index:1}
.card h3{margin:8px 0 4px;font-size:21px;line-height:1.25}
.card p{margin:0;font-size:15px;color:#c8d3ef}
.tag{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.06em;padding:3px 9px;border-radius:999px;background:#e94b3c;color:#fff}
.card:hover{transform:translateY(-4px);border-color:rgba(56,214,255,.5);box-shadow:0 24px 60px rgba(0,0,0,.45)}
.card:hover img{transform:scale(1.06)}

/* 体验横滑 */
.rail{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(300px,1fr);gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 2px 18px;scrollbar-width:thin;scrollbar-color:rgba(160,190,255,.3) transparent}
.exp{scroll-snap-align:start;position:relative;display:block;text-decoration:none;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);padding:14px 14px 20px;transition:transform .35s var(--ease),border-color .3s}
.exp img{border-radius:14px;aspect-ratio:4/3;object-fit:cover;width:100%;margin-bottom:14px}
.exp-n{font-size:12px;font-weight:800;letter-spacing:.2em;color:var(--cyan)}
.exp h3{margin:4px 0 6px;font-size:20px}
.exp p{margin:0;font-size:15px;color:var(--muted)}
.exp:hover{transform:translateY(-4px);border-color:rgba(56,214,255,.45)}
.note-tag{position:absolute;top:24px;left:24px;font-size:11px;font-weight:700;background:rgba(4,10,30,.72);padding:3px 9px;border-radius:999px;border:1px solid rgba(255,255,255,.2)}

/* 学院 */
.academy{background:radial-gradient(900px 500px at 85% 40%,rgba(255,176,74,.12),transparent 60%),radial-gradient(800px 500px at 10% 60%,rgba(138,92,255,.16),transparent 60%),var(--bg)}
.academy-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:center}
.academy-logo{width:120px;height:120px;border-radius:28px;background:#fff;padding:8px;margin-bottom:22px;box-shadow:0 14px 40px rgba(138,92,255,.35)}
.academy h2 em{background:var(--grad-warm);-webkit-background-clip:text;background-clip:text;font-size:.62em;display:inline-block;margin-top:10px;line-height:1.3}
.grades{list-style:none;padding:0;margin:0 0 4px;display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.grades li{border:1px solid var(--line);border-radius:16px;padding:12px;background:var(--panel)}
.grades b{display:block;font-size:15px}
.grades li>span{font-size:13px;color:var(--warm)}
.academy-art{border-radius:28px;padding:1px;background:linear-gradient(140deg,rgba(255,176,74,.6),rgba(138,92,255,.4) 50%,rgba(255,255,255,.08));box-shadow:0 30px 80px rgba(120,60,220,.3)}
.academy-art img{border-radius:27px}

/* 新书 */
.book{background:linear-gradient(180deg,var(--bg),#0b0f26 50%,var(--bg))}
.book-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:64px;align-items:center}
.book-cover{perspective:1000px;justify-self:center;max-width:360px;width:100%}
.book-cover img{border-radius:8px 16px 16px 8px;box-shadow:-14px 24px 60px rgba(0,0,0,.6),0 0 0 1px rgba(255,255,255,.08);transform:rotateY(-14deg) rotateX(4deg);transition:transform .5s var(--ease)}
.book-cover:hover img{transform:rotateY(-4deg) rotateX(1deg) scale(1.02)}
.book-sub{margin:-6px 0 18px;color:var(--cyan);font-weight:600}
.book-facts{list-style:none;padding:0;margin:0 0 26px;display:flex;flex-wrap:wrap;gap:12px}
.book-facts li{border:1px solid var(--line);border-radius:16px;padding:10px 18px;background:var(--panel);min-width:110px}
.book-facts b{display:block;font-size:22px}
.book-facts li>span{font-size:13px;color:var(--muted)}

/* Easy */
.easy{padding-top:40px}
.easy-box{display:grid;grid-template-columns:auto 1fr auto;gap:32px;align-items:center;border:1px solid var(--line);border-radius:28px;padding:34px 38px;background:linear-gradient(120deg,rgba(56,214,255,.08),rgba(138,92,255,.06))}
.easy-badge{width:110px;height:110px;border-radius:28px;background:linear-gradient(140deg,#0e2a66,#1b1446);display:grid;place-items:center;align-content:center;gap:2px;border:1px solid var(--line)}
.easy-badge img{width:56px;height:56px}
.easy-badge span{font-size:12px;font-weight:800;letter-spacing:.3em;color:var(--cyan)}
.easy-copy h2{font-size:clamp(26px,3vw,36px)}
.easy-copy .sub{margin:0}

/* 商家 */
.biz{display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:center}
.biz-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.biz-list li{display:flex;gap:16px;align-items:center;border:1px solid var(--line);border-radius:18px;padding:18px 20px;background:var(--panel);font-size:17px;font-weight:600}
.biz-list b{font-size:14px;color:var(--cyan);letter-spacing:.1em}

/* 页脚 */
.foot{border-top:1px solid var(--line);padding:64px 0 28px;background:#040817;font-size:15px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.foot-brand{display:flex;gap:14px;align-items:flex-start}
.foot-brand p{margin:0;color:var(--muted)}
.foot-brand b{color:var(--ink);letter-spacing:.18em}
.foot h4{margin:0 0 12px;font-size:13px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
.foot-grid a{display:block;text-decoration:none;color:#c9d4ef;padding:4px 0}
.foot-grid a:hover{color:#fff}
.foot-bottom{display:flex;flex-wrap:wrap;gap:10px 28px;justify-content:space-between;margin-top:44px;padding-top:22px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.foot-bottom a{color:var(--muted)}

/* 滚动出现 */
.js .reveal{opacity:0;transform:translateY(28px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.js .reveal.in{opacity:1;transform:none}
.bento .reveal:nth-child(2),.rail .reveal:nth-child(2){transition-delay:.08s}
.bento .reveal:nth-child(3),.rail .reveal:nth-child(3){transition-delay:.16s}
.bento .reveal:nth-child(4),.rail .reveal:nth-child(4){transition-delay:.06s}
.bento .reveal:nth-child(5),.rail .reveal:nth-child(5){transition-delay:.14s}
.bento .reveal:nth-child(6){transition-delay:.22s}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .orb,.grid-floor,.stars{animation:none}
  .js .reveal{opacity:1;transform:none;transition:none}
  .card,.card img,.exp,.btn,.book-cover img,.hero-art{transition:none}
}

@media (max-width:1040px){
  .nav-links{display:none}
  .nav-act{margin-left:auto}
  .hero-grid,.academy-grid,.book-grid,.biz{grid-template-columns:1fr}
  .hero{padding-top:112px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .bento{grid-template-columns:repeat(2,1fr)}
  .ways{grid-template-columns:repeat(2,1fr)}
  .easy-box{grid-template-columns:1fr;text-align:left}
  .foot-grid{grid-template-columns:1fr 1fr}
  .academy-art{order:-1}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  .nav-row{height:62px;gap:10px}
  .brand{font-size:14px;letter-spacing:.12em}
  .ways{grid-template-columns:1fr}
  .way{padding:20px}
  .nav-member{display:none}
  .lang a{padding:5px 9px}
  .hero{padding:96px 0 40px}
  .lead{font-size:17px}
  .cta .btn{flex:1 1 100%}
  .stats{gap:10px;margin-top:40px}
  .stat{padding:14px}
  .stat b{font-size:30px}
  .sec{padding:72px 0}
  .sub{font-size:16px}
  .bento{grid-template-columns:1fr}
  .card,.card.c-wide,.card.c-full{grid-column:auto;aspect-ratio:4/3;min-height:0}
  .card.c-full img{left:0;width:100%;-webkit-mask-image:none;mask-image:none}
  .card.c-full::after{display:block}
  .card.c-full .card-txt{top:auto;width:auto;padding:18px;display:block}
  .card.c-full h3{font-size:19px}
  .card-txt{padding:18px}
  .card h3{font-size:19px}
  .rail{grid-auto-columns:82%}
  .grades{grid-template-columns:repeat(2,1fr)}
  .book-cover{max-width:240px}
  .easy-box{padding:24px 20px}
  .foot-grid{grid-template-columns:1fr}
}