:root{--bg:#050b18;--card:#0b1426;--card2:#101c32;--text:#f3f7ff;--muted:#99a8bf;--brand:#39d7ff;--brand2:#7b55ff;--brand3:#9a45ff;--gold:#ffd166;--danger:#ff6b6b;--line:rgba(255,255,255,.13);--shadow:0 24px 80px rgba(0,0,0,.42);--radius:24px}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,"PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at 18% -4%,rgba(57,215,255,.22),transparent 32%),radial-gradient(circle at 88% 8%,rgba(154,69,255,.26),transparent 30%),linear-gradient(180deg,#050b18,#071224 50%,#030711);color:var(--text)}a{text-decoration:none;color:inherit}.wrap{width:min(1180px,92vw);margin:auto}.top{position:sticky;top:0;z-index:50;background:rgba(5,11,24,.76);backdrop-filter:blur(18px);border-bottom:1px solid rgba(255,255,255,.12);box-shadow:0 10px 38px rgba(0,0,0,.20)}.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 0}.brand{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:900}.brand i{width:38px;height:38px;border-radius:14px;background:url("/assets/logo.svg") center/cover no-repeat;box-shadow:0 14px 36px rgba(70,107,255,.35)}.links{display:flex;gap:22px;color:#d9e8f7}.links a{opacity:.9}.links a:hover{color:var(--brand)}.actions{display:flex;gap:10px}.btn{border:0;border-radius:999px;padding:13px 20px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#05101f;font-weight:900;cursor:pointer;box-shadow:0 14px 34px rgba(70,107,255,.28);display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn:hover{transform:translateY(-1px)}.btn.ghost{background:rgba(255,255,255,.08);color:var(--text);box-shadow:none;border:1px solid var(--line)}.btn.gold{background:linear-gradient(135deg,#ffe08a,#ffb703)}.hero{padding:72px 0 42px}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center}.badge{display:inline-flex;align-items:center;gap:7px;border:1px solid rgba(57,215,255,.30);background:linear-gradient(135deg,rgba(57,215,255,.12),rgba(154,69,255,.12));color:#8fe9ff;padding:9px 13px;border-radius:999px;font-weight:800;font-size:14px}.hero h1{font-size:clamp(38px,6vw,72px);line-height:1.03;margin:18px 0 16px;letter-spacing:-2.2px}.hero h1 span{background:linear-gradient(135deg,#39d7ff,#7b55ff 55%,#b75cff);-webkit-background-clip:text;background-clip:text;color:transparent;text-shadow:0 0 28px rgba(70,107,255,.15)}.sub{font-size:20px;line-height:1.8;color:#c8d8ea;margin:0 0 26px}.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:24px 0}.proof{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px;color:#cce0f6}.proof span{background:rgba(255,255,255,.07);border:1px solid var(--line);padding:9px 12px;border-radius:999px}.demo{background:linear-gradient(180deg,rgba(255,255,255,.09),rgba(255,255,255,.04));border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.demo-head{display:flex;gap:8px;padding:16px;border-bottom:1px solid var(--line)}.dot{width:12px;height:12px;border-radius:50%;background:#ff5f57}.dot:nth-child(2){background:#ffbd2e}.dot:nth-child(3){background:#28c840}.demo-body{padding:22px}.prompt{background:#07111d;border:1px solid var(--line);border-radius:18px;padding:16px;color:#dbeafe;line-height:1.7}.answer{margin-top:14px;background:linear-gradient(135deg,rgba(57,215,255,.10),rgba(123,85,255,.10));border:1px solid rgba(57,215,255,.22);border-radius:18px;padding:16px;line-height:1.7}.section{padding:56px 0}.section h2{font-size:clamp(30px,4vw,48px);margin:0 0 12px}.section p.lead{color:var(--muted);font-size:18px;line-height:1.8;margin:0 0 26px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.04));border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 10px 38px rgba(0,0,0,.18)}.card h3{font-size:23px;margin:8px 0 10px}.card p{color:var(--muted);line-height:1.75}.num{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,rgba(57,215,255,.16),rgba(123,85,255,.16));color:#8fe9ff;display:grid;place-items:center;font-weight:900}.cta{background:linear-gradient(135deg,rgba(57,215,255,.16),rgba(123,85,255,.18));border:1px solid var(--line);border-radius:28px;padding:34px;display:flex;align-items:center;justify-content:space-between;gap:22px}.price{font-size:40px;font-weight:900;color:var(--gold)}.tool-shell{padding:38px 0 70px}.tool-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:24px}.panel{background:rgba(255,255,255,.07);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.panel-pad{padding:24px}.chips{display:flex;flex-wrap:wrap;gap:10px}.chip{border:1px solid var(--line);background:rgba(255,255,255,.06);border-radius:999px;padding:10px 13px;color:#dbeafe;cursor:pointer}.chatbox{height:500px;overflow:auto;padding:20px;display:flex;flex-direction:column;gap:12px}.msg{max-width:88%;padding:14px 16px;border-radius:18px;line-height:1.75;white-space:pre-wrap}.msg.user{align-self:flex-end;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#06111f;font-weight:700}.msg.bot{align-self:flex-start;background:rgba(255,255,255,.08);border:1px solid var(--line)}.inputbar{display:flex;gap:10px;border-top:1px solid var(--line);padding:14px}.inputbar textarea{flex:1;min-height:50px;max-height:120px;resize:vertical;border:1px solid var(--line);border-radius:16px;background:#07111d;color:var(--text);padding:14px;font-size:15px}.notice{padding:12px 14px;border-radius:16px;background:rgba(255,209,102,.12);border:1px solid rgba(255,209,102,.28);color:#ffe8a3}.modal{display:none;position:fixed;inset:0;z-index:999;background:rgba(0,0,0,.58);align-items:center;justify-content:center;padding:20px}.modal.show{display:flex}.modal-card{width:min(460px,94vw);background:#fff;color:#081323;border-radius:24px;padding:26px;box-shadow:0 30px 100px rgba(0,0,0,.45)}.modal-card p{color:#526273;line-height:1.7}.footer{padding:36px 0;color:#8095ad;border-top:1px solid var(--line);margin-top:40px}.float-cta{position:fixed;right:20px;bottom:18px;z-index:60}.mobile-only{display:none}@media(max-width:860px){.links{display:none}.hero-grid,.tool-grid{grid-template-columns:1fr}.grid{grid-template-columns:1fr}.cta{display:block}.actions .ghost{display:none}.hero{padding-top:46px}.chatbox{height:420px}.mobile-only{display:block}.hero h1{letter-spacing:-1px}}

/* V59 高级品牌统一 */
.brand span{font-weight:950;letter-spacing:.3px}.brand span::after{content:'AI SHUEN';display:block;font-size:10px;letter-spacing:3px;color:#7f8da3;line-height:1.05;margin-top:1px}.brand{line-height:1}.card,.panel,.demo{backdrop-filter:blur(12px)}.card:hover{transform:translateY(-3px);border-color:rgba(57,215,255,.32);box-shadow:0 18px 54px rgba(70,107,255,.14);transition:.22s}.btn{background:linear-gradient(135deg,#39d7ff 0%,#466bff 52%,#9a45ff 100%);color:#fff;text-shadow:0 1px 0 rgba(0,0,0,.14)}.btn.ghost{background:rgba(255,255,255,.06);color:#edf5ff}.footer{background:linear-gradient(180deg,rgba(5,11,24,0),#050b18);}.hero:before{content:'';position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(57,215,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(57,215,255,.06) 1px,transparent 1px);background-size:56px 56px;mask-image:linear-gradient(180deg,rgba(0,0,0,.65),transparent 70%)}.hero{position:relative;overflow:hidden}.hero .wrap{position:relative;z-index:1}