/* ============================================================
   VidForge — design system v2
   参考 higgsfield.ai/ai-video：连续画布 / 视频优先 / Space Grotesk
   ============================================================ */
@font-face{font-family:"Space Grotesk";src:url("/assets/fonts/space-grotesk-400.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Space Grotesk";src:url("/assets/fonts/space-grotesk-500.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:"Space Grotesk";src:url("/assets/fonts/space-grotesk-600.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"Space Grotesk";src:url("/assets/fonts/space-grotesk-700.woff2") format("woff2");font-weight:700;font-style:normal;font-display:swap}

:root{
  --bg:#06070b; --surface:#0d0f16; --surface2:#141722;
  --line:rgba(255,255,255,.09); --line-strong:rgba(255,255,255,.16);
  --text:#f2f3f8; --muted:#9aa2b4; --dim:#6b7385;
  --accent:#7c6cff; --accent2:#22d3ee; --accent3:#f472b6;
  --grad:linear-gradient(115deg,#7c6cff 0%,#22d3ee 100%);
  --grad-soft:linear-gradient(115deg,rgba(124,108,255,.22),rgba(34,211,238,.14));
  --radius:20px; --radius-sm:12px; --wrap:1200px;
  --font-display:"Space Grotesk",Inter,ui-sans-serif,system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);overflow-x:hidden;
  font:16px/1.6 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  -webkit-font-smoothing:antialiased;
}
/* 连续画布：全局光斑 + 细噪点，替代原来的灰底分段 */
body:before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(60% 40% at 15% 0%,rgba(124,108,255,.20),transparent 60%),
    radial-gradient(50% 40% at 85% 10%,rgba(34,211,238,.13),transparent 60%),
    radial-gradient(70% 50% at 50% 100%,rgba(244,114,182,.08),transparent 65%);
}
body:after{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.35;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.35'/%3E%3C/svg%3E");
  mix-blend-mode:overlay}
main,.site-header,.site-footer,.announce{position:relative;z-index:1}

a{color:inherit;text-decoration:none}
p{margin:0 0 1em}
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.05;margin:0 0 .5em;letter-spacing:-.025em;font-weight:700}
h1{font-size:clamp(2.6rem,5.6vw,4.5rem);line-height:1.02;letter-spacing:-.035em}
h2{font-size:clamp(1.9rem,3.4vw,3rem);line-height:1.04}
h3{font-size:1.22rem;letter-spacing:-.01em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px;width:100%}
.narrow{max-width:820px}
.center{text-align:center}
.muted{color:var(--muted)}
.dim{color:var(--dim)}
.lead{font-size:1.12rem;color:#c6ccdb;max-width:68ch}
.fine{font-size:.86rem;color:var(--dim)}
.eyebrow{font-family:var(--font-display);font-size:.72rem;font-weight:600;letter-spacing:.16em;
  text-transform:uppercase;color:var(--accent2);margin:0 0 16px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:#fff;color:#000;padding:8px 12px;border-radius:8px;z-index:99}

/* ---------- announcement ---------- */
.announce{background:rgba(124,108,255,.12);border-bottom:1px solid var(--line);font-size:.84rem;text-align:center}
.announce a{display:block;padding:9px 24px;color:#cfcaff}
.announce a:hover{color:#fff}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(6,7,11,.72);
  backdrop-filter:saturate(140%) blur(18px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:26px;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:1.14rem;letter-spacing:-.02em}
.logo-mark{display:grid;place-items:center;width:28px;height:28px;border-radius:9px;background:var(--grad);color:#07080c;font-size:.72rem;box-shadow:0 6px 20px -6px rgba(124,108,255,.9)}
.main-nav{display:flex;gap:26px;margin-left:6px}
.main-nav a{font-size:.93rem;color:#b9c0d0;transition:color .15s}
.main-nav a:hover{color:#fff}
.header-actions{margin-left:auto;display:flex;gap:10px;align-items:center}
.nav-toggle{display:none;background:none;border:0;color:var(--text);font-size:1.3rem;cursor:pointer}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:999px;font-family:var(--font-display);font-weight:600;font-size:.95rem;
  border:1px solid transparent;cursor:pointer;transition:transform .16s ease,filter .16s ease,background .16s;white-space:nowrap}
.btn-primary{background:var(--grad);color:#06070b;box-shadow:0 10px 30px -12px rgba(124,108,255,.9)}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.07);color:#06070b}
.btn-ghost{background:rgba(255,255,255,.04);border-color:var(--line);color:var(--text)}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:var(--line-strong);color:#fff}
.btn-sm{padding:9px 16px;font-size:.86rem}
.btn-lg{padding:16px 32px;font-size:1.02rem}

/* ---------- hero（全屏视频） ---------- */
.hero{position:relative;min-height:min(88vh,820px);display:flex;align-items:center;overflow:hidden;
  border-bottom:1px solid var(--line)}
.hero-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;opacity:.85}
.hero-veil{position:absolute;inset:0;z-index:1;
  background:
    radial-gradient(75% 65% at 50% 15%,rgba(6,7,11,.05),rgba(6,7,11,.62) 72%),
    linear-gradient(180deg,rgba(6,7,11,.30) 0%,rgba(6,7,11,.12) 42%,var(--bg) 100%)}
.hero-inner{position:relative;z-index:2;width:100%;padding:64px 0 56px}
.hero h1{max-width:17ch}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:1.05rem;color:#c9cfdd;max-width:56ch;margin:18px 0 26px}
.hero-corner{position:absolute;right:28px;bottom:26px;z-index:2;display:flex;gap:10px;align-items:center;
  font-size:.8rem;color:#9aa2b4}

/* 生成器（玻璃卡） */
.generator{max-width:100%;background:rgba(13,15,22,.72);border:1px solid var(--line-strong);
  border-radius:24px;padding:16px;backdrop-filter:blur(22px) saturate(140%);
  box-shadow:0 40px 90px -50px rgba(0,0,0,.9),0 0 0 1px rgba(255,255,255,.03) inset}
.generator textarea{width:100%;background:transparent;border:0;color:var(--text);resize:vertical;
  font:inherit;font-size:1rem;padding:12px 10px;min-height:66px;outline:none}
.generator textarea::placeholder{color:#7b8397}
.gen-bar{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap;padding-top:8px;border-top:1px solid var(--line)}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{background:rgba(255,255,255,.05);border:1px solid var(--line);color:#c2c8d8;
  padding:8px 14px;border-radius:999px;font-size:.83rem;cursor:pointer;font-family:var(--font-display);transition:.15s}
.chip:hover{border-color:var(--line-strong)}
.chip.active{background:rgba(124,108,255,.22);border-color:rgba(124,108,255,.7);color:#e6e2ff}
.gen-controls{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.select{background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--text);border-radius:12px;
  padding:11px 14px;font:inherit;font-size:.87rem;cursor:pointer;outline:none}
.select:focus{border-color:rgba(124,108,255,.8)}
#gen-cost{margin:12px 6px 0;color:#8b94ab}
.model-strip{max-width:860px;margin-top:26px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.logos{display:flex;gap:9px;flex-wrap:wrap}
.logos a{font-family:var(--font-display);font-size:.83rem;color:#c2c8d8;border:1px solid var(--line);
  border-radius:999px;padding:7px 14px;background:rgba(255,255,255,.035);transition:.15s}
.logos a:hover{border-color:rgba(124,108,255,.6);color:#fff;background:rgba(124,108,255,.12)}

/* 结果卡 */
.hero-result{max-width:860px;margin:22px 0 0}
.result-card{display:flex;flex-direction:column;gap:14px;background:rgba(13,15,22,.85);
  border:1px solid var(--line-strong);border-radius:20px;padding:16px;backdrop-filter:blur(16px)}
.result-card .result-meta{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.result-card .result-meta p{margin:2px 0 0}
.result-thumb{width:100%;border-radius:12px;overflow:hidden}
.result-video{width:100%;max-width:640px;border-radius:14px;display:block;background:#000}
.result-demo{width:100%;max-width:640px;aspect-ratio:16/10;border-radius:14px;display:grid;place-items:center;
  background:var(--grad-soft);border:1px solid var(--line);color:#e8e4ff;font-family:var(--font-display);font-weight:700;letter-spacing:.08em}
.progress{height:5px;background:rgba(255,255,255,.08);border-radius:99px;overflow:hidden;margin:14px 0 8px}
.progress>i{display:block;height:100%;width:0;background:var(--grad);transition:width .4s ease}

/* ---------- marquee ---------- */
.marquee{overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.02);padding:16px 0;mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee-track{display:flex;gap:52px;width:max-content;animation:scroll 38s linear infinite;align-items:center}
.marquee span{font-family:var(--font-display);font-size:1.02rem;font-weight:600;color:#8b93a6;white-space:nowrap;display:flex;align-items:center;gap:14px}
.marquee span:after{content:"✦";color:rgba(124,108,255,.7);font-size:.8rem}
@keyframes scroll{to{transform:translateX(-50%)}}

/* ---------- sections ---------- */
.section{padding:110px 0;position:relative}
.section-tight{padding:70px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.section-head h2{margin:0;max-width:22ch}
.section-head p{margin:10px 0 0;color:var(--muted);max-width:52ch}
.hairline{height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.14),transparent);border:0;margin:0}

/* ---------- grids & cards ---------- */
.grid-2,.grid-3,.grid-4{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:rgba(255,255,255,.028);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;transition:transform .2s ease,border-color .2s ease,background .2s}
.card:hover{border-color:var(--line-strong);background:rgba(255,255,255,.045);transform:translateY(-3px)}
.card p{color:#b3bacb;margin-bottom:0;font-size:.95rem}
.card h3{margin-bottom:.5em}
.card-link{display:block}
.ticks{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:9px}
.ticks li{position:relative;padding-left:24px;color:#c2c8d8;font-size:.93rem}
.ticks li:before{content:"→";position:absolute;left:0;color:var(--accent2);font-weight:700}

/* ---------- model tabs（One studio 板块） ---------- */
.tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.tab{font-family:var(--font-display);background:rgba(255,255,255,.04);border:1px solid var(--line);
  color:#c2c8d8;border-radius:999px;padding:10px 18px;font-size:.9rem;font-weight:600;cursor:pointer;transition:.15s}
.tab:hover{border-color:var(--line-strong)}
.tab[aria-selected="true"]{background:var(--grad);color:#06070b;border-color:transparent;box-shadow:0 10px 26px -14px rgba(124,108,255,.9)}
.tab-panel{display:none}
.tab-panel.active{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.tab-panel .media{aspect-ratio:16/11;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);position:relative}
.tab-panel .media video{width:100%;height:100%;object-fit:cover;display:block}
.tab-panel h3{font-size:2rem;margin-bottom:.35em}
.tab-panel .specs{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:26px}
.spec{border-top:1px solid var(--line);padding-top:12px}
.spec dt{font-family:var(--font-display);font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);margin:0 0 4px}
.spec dd{margin:0;font-size:1.02rem;font-weight:600}

/* ---------- media wall ---------- */
.media-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.tile-video{position:relative;border-radius:16px;overflow:hidden;border:1px solid var(--line);aspect-ratio:3/4;background:#0a0c12}
.tile-video video{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s ease,filter .3s}
.tile-video:hover video{transform:scale(1.06);filter:saturate(1.2)}
.tile-video .tile-label{position:absolute;left:12px;bottom:12px;right:12px;display:flex;justify-content:space-between;
  align-items:center;gap:8px;font-size:.78rem;color:#e7e9f2;text-shadow:0 1px 8px rgba(0,0,0,.7);z-index:2}
.tile-video .tile-label b{font-family:var(--font-display);font-weight:600}
.tile-video .tile-label i{font-style:normal;color:#a9b1c4;font-size:.72rem}
.tile-video:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(4,5,9,.8));pointer-events:none}

/* ---------- 三段能力（带视频） ---------- */
.cap-card{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:#0a0c12}
.cap-card video{width:100%;aspect-ratio:16/10;object-fit:cover;display:block;opacity:.85;transition:opacity .3s,transform .5s}
.cap-card:hover video{opacity:1;transform:scale(1.03)}
.cap-body{padding:24px 26px 28px}
.cap-body h3{font-size:1.4rem}
.cap-body p{margin:0;color:#b3bacb;font-size:.95rem}

/* ---------- steps / stats ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:44px}
.step{border-top:1px solid var(--line);padding-top:22px}
.step-num{font-family:var(--font-display);font-size:.8rem;letter-spacing:.14em;color:var(--accent2);display:block;margin-bottom:10px}
.step h3{font-size:1.12rem;margin-bottom:.4em}
.step p{margin:0;color:#aab2c4;font-size:.93rem}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-top:8px}
.stat{background:#0a0c12;padding:30px 22px;text-align:center}
.stat strong{display:block;font-family:var(--font-display);font-size:2.1rem;font-weight:700;letter-spacing:-.03em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:.84rem;color:var(--muted)}

/* ---------- model cards ---------- */
.model-card{display:block;background:rgba(255,255,255,.028);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s}
.model-card:hover{transform:translateY(-3px);border-color:var(--line-strong)}
.thumb{position:relative;aspect-ratio:16/10;display:grid;place-items:center;overflow:hidden;background:#0a0c12}
.thumb video,.thumb img{width:100%;height:100%;object-fit:cover;display:block;opacity:.9}
.thumb-initials{font-family:var(--font-display);font-size:1.7rem;font-weight:700;color:rgba(6,7,11,.7)}
.badge{position:absolute;top:10px;left:10px;background:rgba(6,7,11,.7);color:#fff;font-family:var(--font-display);
  font-size:.71rem;font-weight:600;padding:4px 10px;border-radius:999px;backdrop-filter:blur(6px);border:1px solid var(--line);z-index:2}
.model-body{padding:18px 20px 20px}
.model-body h3{margin:0 0 5px;font-size:1.05rem}
.model-body p{margin:0;font-size:.84rem;color:var(--muted)}
.model-body p+p{margin-top:6px;color:#96a0b5}

/* ---------- model page ---------- */
.crumbs{display:flex;gap:9px;align-items:center;flex-wrap:wrap;padding-top:28px;font-size:.84rem;color:var(--dim)}
.crumbs a:hover{color:#fff}
.crumbs .sep{color:#3a4152}
.model-hero{padding-top:34px}
.model-hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.pill{display:inline-block;background:rgba(124,108,255,.16);border:1px solid rgba(124,108,255,.4);color:#cfcaff;
  font-family:var(--font-display);font-size:.74rem;font-weight:600;padding:5px 12px;border-radius:999px;margin-bottom:16px;letter-spacing:.06em}
.params{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:0 0 18px;color:#d7dbe6;font-weight:600}
.params span{background:rgba(255,255,255,.05);border:1px solid var(--line);padding:6px 13px;border-radius:999px;font-size:.88rem;font-family:var(--font-display)}
.params i{color:#3a4152;font-style:normal}
.hero-ctas{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0 16px}
.model-preview{aspect-ratio:4/3;border-radius:22px;overflow:hidden;border:1px solid var(--line-strong);position:relative}
.model-preview video,.model-preview img{width:100%;height:100%;object-fit:cover;display:block}
.model-preview .pv-label{position:absolute;left:16px;bottom:14px;font-size:.76rem;color:#cdd2df;
  background:rgba(6,7,11,.6);padding:5px 10px;border-radius:999px;border:1px solid var(--line)}

/* ---------- tables ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);margin:28px 0;background:rgba(255,255,255,.02)}
.compare{width:100%;border-collapse:collapse;min-width:660px;font-size:.93rem}
.compare th,.compare td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line)}
.compare th{background:rgba(255,255,255,.03);font-family:var(--font-display);font-size:.74rem;text-transform:uppercase;letter-spacing:.1em;color:var(--dim)}
.compare tbody tr:last-child td{border-bottom:0}
.compare tbody tr:hover{background:rgba(255,255,255,.025)}
.spec-table{width:100%;border-collapse:collapse;font-size:.92rem}
.spec-table td{padding:12px 0;border-bottom:1px solid var(--line)}
.spec-table td:last-child{text-align:right;font-weight:600}

/* ---------- pricing ---------- */
.price-card{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:var(--radius);padding:30px;display:flex;flex-direction:column;gap:12px;transition:.2s}
.price-card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.price-card.highlight{border-color:rgba(124,108,255,.55);background:linear-gradient(180deg,rgba(124,108,255,.10),rgba(255,255,255,.02));
  box-shadow:0 30px 70px -50px rgba(124,108,255,.9)}
.price{font-family:var(--font-display);font-size:2.4rem;font-weight:700;letter-spacing:-.04em}
.price span{font-size:.8rem;font-weight:500;color:var(--dim);margin-left:5px;letter-spacing:0}
.price-card .btn{margin-top:auto}

/* ---------- faq ---------- */
.faq{display:grid;gap:10px;margin-top:28px}
.faq details{background:rgba(255,255,255,.025);border:1px solid var(--line);border-radius:14px;padding:0 20px;transition:.2s}
.faq details[open]{background:rgba(255,255,255,.04);border-color:var(--line-strong)}
.faq summary{cursor:pointer;font-family:var(--font-display);font-weight:600;padding:19px 0;list-style:none;display:flex;justify-content:space-between;gap:18px;font-size:1.01rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";color:var(--accent2);font-size:1.3rem;line-height:1}
.faq details[open] summary:after{content:"–"}
.faq-a{padding:0 0 20px;color:#b3bacb;font-size:.95rem}
.faq-a p{margin:0}

/* ---------- howto / cta ---------- */
.howto{list-style:none;counter-reset:h;padding:0;margin:30px 0 0;display:grid;gap:14px}
.howto li{position:relative;padding:20px 22px 20px 66px;background:rgba(255,255,255,.025);border:1px solid var(--line);border-radius:14px}
.howto li:before{counter-increment:h;content:counter(h);position:absolute;left:18px;top:17px;width:32px;height:32px;
  border-radius:10px;background:var(--grad);color:#06070b;display:grid;place-items:center;font-family:var(--font-display);font-weight:700;font-size:.9rem}
.howto strong{display:block;margin-bottom:3px}
.howto span{color:#b3bacb;font-size:.94rem}
.cta-band{position:relative;overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:120px 0;text-align:center}
.cta-band video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.45;z-index:0}
.cta-band .wrap{position:relative;z-index:1}
.cta-band p{max-width:56ch;margin:0 auto 26px;color:#c2c8d8}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);padding:70px 0 34px;background:rgba(4,5,8,.6)}
.footer-grid{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:36px}
.footer-brand p{color:var(--muted);font-size:.9rem;max-width:34ch;margin-top:14px}
.footer-col h4{font-family:var(--font-display);font-size:.74rem;text-transform:uppercase;letter-spacing:.12em;color:var(--dim);margin-bottom:14px}
.footer-col a{display:block;font-size:.89rem;color:#aab2c4;padding:5px 0}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:52px;padding-top:24px;
  border-top:1px solid var(--line);font-size:.82rem;color:var(--dim)}

/* ---------- reveals ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.marquee-track{animation:none}}

/* ---------- credits badge ---------- */
.credits{display:inline-flex;align-items:center;gap:7px;background:rgba(255,255,255,.05);border:1px solid var(--line);
  color:#cfcaff;font-family:var(--font-display);font-size:.82rem;font-weight:600;padding:8px 14px;border-radius:999px;white-space:nowrap}
.credits:before{content:"◈";color:var(--accent2)}
.err{color:#fca5a5}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .media-wall{grid-template-columns:repeat(3,1fr)}
  .tab-panel.active{grid-template-columns:1fr;gap:26px}
  .model-hero-grid{grid-template-columns:1fr;gap:30px}
  .footer-grid{grid-template-columns:1fr 1fr 1fr}
  .section{padding:80px 0}
}
@media (max-width:820px){
  .main-nav{position:fixed;inset:66px 0 auto;background:#080a10;border-bottom:1px solid var(--line);
    flex-direction:column;gap:0;padding:8px 28px;display:none}
  .main-nav.open{display:flex}
  .main-nav a{padding:14px 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:block}
  .hero{min-height:auto}
  .hero-inner{padding:80px 0 70px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .media-wall{grid-template-columns:repeat(2,1fr)}
  .steps,.stats{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .generator{padding:14px}
}
@media (max-width:520px){
  .steps,.stats{grid-template-columns:1fr}
  .header-actions .credits,.header-actions .btn-ghost{display:none}
  .media-wall{grid-template-columns:1fr 1fr}
  .tile-video{aspect-ratio:3/4}
  .wrap{padding:0 18px}
}

/* ---------- hero 双栏 ---------- */
.hero-grid{display:grid;grid-template-columns:1.16fr .84fr;gap:48px;align-items:center}
.hero-copy{min-width:0}
.hero-copy h1{font-size:clamp(2.4rem,4.6vw,4rem);max-width:15ch}
.hero-side{position:relative;min-width:0}
.hero-card{position:relative;max-width:470px;margin-left:auto;border-radius:26px;overflow:hidden;border:1px solid var(--line-strong);
  background:rgba(10,12,18,.55);box-shadow:0 60px 120px -70px #000,0 0 0 1px rgba(255,255,255,.03) inset}
.hero-card video{width:100%;aspect-ratio:16/12;object-fit:cover;display:block}
.hc-chip{position:absolute;top:14px;left:14px;font-family:var(--font-display);font-size:.72rem;font-weight:600;
  color:#e9e6ff;background:rgba(6,7,11,.6);border:1px solid var(--line);border-radius:999px;padding:5px 11px;
  backdrop-filter:blur(8px)}
.hc-bar{display:flex;justify-content:space-between;gap:12px;padding:14px 18px;font-size:.8rem;color:#c3c9d8;
  border-top:1px solid var(--line);background:rgba(6,7,11,.55);font-family:var(--font-display)}
.hero-mini{margin-top:16px;display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:.8rem;color:var(--muted)}
.hero-mini span{background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:999px;padding:5px 11px;font-family:var(--font-display)}
.hero-mini a{color:var(--accent2);font-family:var(--font-display);font-weight:600}
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-side{display:none}
  .hero{min-height:auto}
}

/* ============================================================
   v3 — 排版节奏：4 种区块留白 + 全出血媒体带 + sticky 叙事
   目标：消除"每个 section 都 110/110、标题同宽"的模板感
   ============================================================ */
:root{--bg:#0b0b0b}
body{background:var(--bg)}
body:before{opacity:.75}

/* 留白变体（交替使用，制造快慢节奏） */
.section{ padding:96px 0 }
.section-tall{ padding:150px 0 }
.section-tight{ padding:56px 0 }
.section-flush{ padding:0 }
.section-mid{ padding:120px 0 72px }

/* 全出血媒体带 */
.band{position:relative;overflow:hidden;height:min(76vh,660px);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.band video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.75}
.band:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,11,11,.55),rgba(11,11,11,.15) 45%,rgba(11,11,11,.85))}
.band-inner{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:flex-end;padding-bottom:64px}
.band-inner h2{max-width:16ch;font-size:clamp(2rem,4.2vw,3.4rem)}
.band-inner p{max-width:44ch;color:#c9cfdd}
.band-tag{position:absolute;right:28px;top:24px;z-index:2;font-family:var(--font-display);font-size:.72rem;
  letter-spacing:.14em;text-transform:uppercase;color:#d8dbe6;background:rgba(11,11,11,.55);
  border:1px solid var(--line);border-radius:999px;padding:6px 12px;backdrop-filter:blur(8px)}

/* 标题宽度变体（打破"全部同宽"） */
.h2-narrow{max-width:13ch}
.h2-mid{max-width:22ch}
.h2-wide{max-width:none}
.h3-40{font-size:clamp(1.6rem,2.7vw,2.5rem);line-height:1.06;letter-spacing:-.03em}

/* 不对称两栏 */
.split{display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;align-items:center}
.split-rev{grid-template-columns:1.1fr .9fr}
.split .media-lg{border-radius:24px;overflow:hidden;border:1px solid var(--line)}
.split .media-lg video{width:100%;display:block;aspect-ratio:16/11;object-fit:cover}

/* sticky 滚动叙事 */
.sticky-story{display:grid;grid-template-columns:.82fr 1.18fr;gap:64px;align-items:start}
.sticky-copy{position:sticky;top:120px;align-self:start}
.sticky-copy h2{max-width:15ch}
.sticky-copy .ticks{margin-top:26px}
.story-list{display:grid;gap:22px}
.story-item{border:1px solid var(--line);border-radius:22px;overflow:hidden;background:#0e0f14}
.story-item video{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}
.story-item .si-body{padding:22px 26px 26px}
.story-item h3{font-size:1.18rem;margin-bottom:.3em}
.story-item p{margin:0;color:#aeb5c6;font-size:.93rem}

/* 编辑式行（去掉卡片边框，靠排版而不是卡片） */
.editorial{display:grid;gap:0;border-top:1px solid var(--line)}
.ed-row{display:grid;grid-template-columns:.34fr .66fr;gap:40px;padding:52px 0;border-bottom:1px solid var(--line);align-items:start}
.ed-row h3{font-size:clamp(1.4rem,2.2vw,2rem);margin:0;letter-spacing:-.03em}
.ed-row .ed-body{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}
.ed-row p{margin:0;color:#aeb5c6}
.ed-row .ed-media{border-radius:18px;overflow:hidden;border:1px solid var(--line)}
.ed-row .ed-media video{width:100%;aspect-ratio:16/10;object-fit:cover;display:block}
@media (max-width:900px){
  .split,.split-rev,.sticky-story{grid-template-columns:1fr;gap:32px}
  .sticky-copy{position:static}
  .ed-row{grid-template-columns:1fr;gap:18px;padding:36px 0}
  .ed-row .ed-body{grid-template-columns:1fr}
  .section{padding:64px 0}.section-tall{padding:88px 0}.section-mid{padding:72px 0 48px}
  .band{height:min(58vh,440px)}
}