/* home.css —— 由 index.html 内联样式外置（内容原样） */

:root{
  --bg:#0b1421; --bg2:#101a28; --surface:#162231; --surface2:#1a2836;
  --line:rgba(150,205,195,.20); --text:#eef5f1; --dim:#a3b8cc; --muted:#788ea3;
  --accent:#2dd4bf; --accent2:#34d399; --accent-soft:rgba(45,212,191,.12);
  --ink:#04120f; --rs:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Segoe UI",sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
.glow{position:fixed;inset:0;z-index:-2;pointer-events:none;background:
  radial-gradient(900px 480px at 72% -6%,rgba(45,212,191,.16),transparent 60%),
  radial-gradient(700px 420px at 12% 8%,rgba(52,211,153,.10),transparent 55%),
  var(--bg)}
.gridbg{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;background-image:linear-gradient(rgba(148,200,190,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(148,200,190,.05) 1px,transparent 1px);background-size:52px 52px;mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%)}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}
/* topbar */
.topbar{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(11,20,33,.72);border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:11px}
.brand .logo{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--accent2),var(--accent));display:grid;place-items:center;color:var(--ink);font-weight:800;font-size:19px;box-shadow:0 10px 26px -10px var(--accent)}
.brand b{font-size:18px;letter-spacing:.5px}
.brand .en{display:block;font-size:10px;letter-spacing:2.6px;color:var(--muted);text-transform:uppercase;margin-top:1px}
.top-actions{display:flex;align-items:center;gap:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:12px;font-weight:700;font-size:14px;cursor:pointer;border:none;transition:.18s;font-family:inherit}
.btn.primary{background:linear-gradient(120deg,var(--accent2),var(--accent));color:var(--ink);box-shadow:0 12px 30px -12px var(--accent)}
.btn.primary:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--text-dim)}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent)}
/* hero */
.hero{padding:84px 0 66px;text-align:center;position:relative}
.hero .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:var(--accent);border:1px solid var(--accent-soft);background:var(--accent-soft);padding:7px 15px;border-radius:30px;letter-spacing:.3px;font-weight:600}
.hero h1{font-size:clamp(32px,5.4vw,54px);line-height:1.16;font-weight:800;letter-spacing:-.4px;margin:22px auto 18px;max-width:960px}
.hero h1 .grad{background:linear-gradient(100deg,#67e8f9,var(--accent2) 45%,var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{font-size:clamp(15px,2vw,17.5px);color:var(--dim);max-width:680px;margin:0 auto 30px}
.hero p.sub b{color:var(--accent)}
.hero .cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.hero .mini{margin-top:16px;font-size:12.5px;color:var(--muted)}
/* demo mock */
.demo{max-width:760px;margin:52px auto 0;text-align:left;background:linear-gradient(180deg,rgba(22,34,48,.92),rgba(16,24,36,.92));border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 40px 90px -40px rgba(0,0,0,.8)}
.demo .dhead{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:12.5px;margin-bottom:16px}
.demo .dot{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 14px var(--accent)}
.demo .row{display:grid;grid-template-columns:1fr 18px 1.12fr;gap:14px;align-items:center}
@media(max-width:760px){.demo .row{grid-template-columns:1fr;gap:10px}.demo .arrow{transform:rotate(90deg);text-align:center}}
.demo .box{background:var(--surface2);border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.demo .box .lbl{font-size:11px;letter-spacing:1.5px;color:var(--muted);text-transform:uppercase;margin-bottom:8px}
.demo .box .txt{font-size:13.5px;color:var(--text-dim);white-space:pre-wrap}
.demo .box .txt b{color:var(--accent)}
.demo .arrow{color:var(--accent);font-size:20px;font-weight:800}
.demo .imgbig{margin-top:16px;position:relative}
.demo .imgbig .lbl{font-size:11px;letter-spacing:1.6px;color:var(--muted);text-transform:uppercase;margin-bottom:9px}
.demo .imgbig img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:18px;border:1px solid var(--line);display:block;box-shadow:0 34px 80px -44px rgba(0,0,0,.85)}
.demo .dfoot{margin-top:16px;font-size:12px;color:var(--muted);border-top:1px dashed var(--line);padding-top:12px}
/* section */
section{padding:64px 0}
.sechead{text-align:center;max-width:640px;margin:0 auto 40px}
.sechead .k{font-size:12px;letter-spacing:2.5px;color:var(--accent);text-transform:uppercase;font-weight:700}
.sechead h2{font-size:clamp(26px,4vw,38px);font-weight:800;margin:12px 0 12px;letter-spacing:-.4px}
.sechead p{color:var(--dim);font-size:15px}
/* feature cards with image */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:960px){.cards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.cards{grid-template-columns:1fr}}
.card{background:linear-gradient(180deg,var(--surface),var(--bg2));border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:.22s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);border-color:rgba(45,212,191,.4);box-shadow:0 26px 50px -26px rgba(45,212,191,.35)}
.card .cimg{width:100%;aspect-ratio:16/9;object-fit:cover;border-bottom:1px solid var(--line)}
.card .cb{padding:18px 20px}
.card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.card p{font-size:13.5px;color:var(--dim)}
/* demo pair */
.pairs{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:760px){.pairs{grid-template-columns:1fr}}
.pair{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:22px}
.pair .ph{font-size:12px;color:var(--muted);margin-bottom:12px;letter-spacing:.5px}
.pair .in{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:14px;font-size:13.5px;color:var(--dim);margin-bottom:12px}
.pair .out{background:var(--accent-soft);border:1px solid rgba(45,212,191,.3);border-radius:12px;padding:14px;font-size:13px;color:var(--text);white-space:pre-wrap}.pair .out.cut .of{display:none}.pair .out.cut.expand .of{display:block}.pair .out.cut.expand .oc{display:none}.pair .out .out-more{margin-top:8px;display:block;width:100%;text-align:right;background:none;border:none;color:var(--accent);font-size:12px;cursor:pointer;padding:0;font-family:inherit}
.pair .pairimg{margin-top:12px}
.pair .pairimg img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:12px;border:1px solid var(--line);display:block}
/* pricing 4 */
.price{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:900px){.price{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.price{grid-template-columns:1fr}}
.pcard{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:26px 22px;text-align:center;position:relative;transition:.2s;display:flex;flex-direction:column}
.pcard.hot{border-color:rgba(45,212,191,.5);background:linear-gradient(180deg,rgba(45,212,191,.10),var(--surface));box-shadow:0 30px 60px -30px rgba(45,212,191,.4)}
.pcard .tag{position:absolute;top:16px;right:16px;font-size:11px;color:var(--accent);border:1px solid var(--accent-soft);background:var(--accent-soft);padding:4px 10px;border-radius:20px}
.pcard h3{font-size:15px;color:var(--dim);font-weight:600}
.pcard .p{font-size:34px;font-weight:800;margin:12px 0 4px}
.pcard .p small{font-size:13px;font-weight:600;color:var(--muted)}
.pcard ul{list-style:none;margin:14px 0 18px;text-align:left;flex:1}
.pcard li{font-size:13px;color:var(--dim);padding:5px 0;display:flex;gap:8px;align-items:flex-start}
.pcard li::before{content:"✓";color:var(--accent);font-weight:800;flex:none}
.pcard .btn{width:100%;margin-top:auto}
/* faq */
.faq{max-width:760px;margin:0 auto}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden}
.faq summary{list-style:none;cursor:pointer;padding:17px 20px;font-weight:600;font-size:15px;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:20px;transition:.2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .a{padding:0 20px 18px;color:var(--dim);font-size:14px}
/* footer */
footer{border-top:1px solid var(--line);padding:36px 0 30px;text-align:center;color:var(--muted);font-size:12.5px}
footer .line{max-width:420px;margin:0 auto 12px;height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent)}
footer .icp{margin-top:6px;opacity:.7}
/* reveal */
.rv{opacity:0;transform:translateY(22px);transition:.6s cubic-bezier(.2,.7,.2,1)}
.rv.on{opacity:1;transform:none}

/* hero showcase (成片主视觉) */
.showcase{max-width:1120px;margin:46px auto 0;text-align:left}
.showcase .scap{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.showcase .scap .sh{font-size:13px;letter-spacing:2.6px;color:var(--accent);text-transform:uppercase;font-weight:800}
.showcase .scap .sc-desc{font-size:12.5px;color:var(--muted)}
.feat-grid{display:grid;grid-template-columns:.92fr 1fr .92fr;grid-auto-rows:min(23vw,250px);gap:16px}
.feat-grid .shot.tall{grid-column:1;grid-row:1/3}
.feat-grid .shot.tall.r{grid-column:3}
.feat-grid .shot.stack{grid-column:2}
.feat-grid .shot.stack.s1{grid-row:1}
.feat-grid .shot.stack.s2{grid-row:2}
.feat-grid .shot.tall img{object-position:center}
@media(max-width:900px){.feat-grid{grid-template-columns:.92fr 1fr .92fr;grid-auto-rows:min(22vw,225px);gap:14px}}
@media(max-width:640px){.feat-grid{grid-template-columns:1fr;grid-auto-rows:min(120vw,470px);gap:14px}.feat-grid .shot{grid-column:1!important;grid-row:auto!important}}
.shot{position:relative;overflow:hidden;border-radius:20px;border:1px solid var(--line);background:var(--surface2);box-shadow:0 36px 80px -42px rgba(0,0,0,.9);cursor:pointer;min-height:0}
.shot img{display:block;width:100%;height:100%;object-fit:cover;transition:transform .8s cubic-bezier(.2,.7,.2,1)}
.shot:hover img{transform:scale(1.045)}
.shot figcaption{position:absolute;inset:auto 0 0 0;padding:14px 15px 13px;background:linear-gradient(180deg,transparent,rgba(4,15,13,.94));opacity:0;transform:translateY(8px);transition:.28s}
.shot:hover figcaption{opacity:1;transform:none}
.shot figcaption .chip{display:inline-block;font-size:10.5px;color:#062019;background:linear-gradient(120deg,var(--accent2),var(--accent));padding:3px 9px;border-radius:20px;font-weight:800;letter-spacing:.4px}
.shot figcaption b{display:block;margin-top:6px;font-size:13.5px;color:var(--text)}
.shot.cta-tile{display:flex;flex-direction:column;justify-content:center;align-items:flex-start;padding:16px 18px;background:linear-gradient(160deg,rgba(45,212,191,.18),var(--surface2))}
.shot.cta-tile .ct{font-size:17px;font-weight:800;line-height:1.3;text-align:left;background:linear-gradient(100deg,#67e8f9,var(--accent2) 50%,var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.shot.cta-tile p{font-size:11.5px;color:var(--dim);margin:6px 0 10px}
.btn.sm{padding:10px 16px;font-size:13px}
.plat{display:flex;align-items:center;gap:9px;flex-wrap:wrap;justify-content:center;margin-top:24px}
.plat span{font-size:11.5px;color:var(--muted);letter-spacing:1px;margin-right:4px}
.plat b{font-size:12px;color:var(--dim);border:1px solid var(--line);padding:5px 12px;border-radius:20px}