:root {
  --ink: #0d1020;
  --night: #11162a;
  --panel: #171d35;
  --panel-2: #1d2544;
  --text: #f4f6ff;
  --muted: #a9b3d2;
  --line: rgba(255,255,255,.12);
  --mint: #79f2d0;
  --blue: #6d7cff;
  --coral: #ff9d78;
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: var(--ink); font-family: "Segoe UI", "Microsoft YaHei", sans-serif; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.wrap { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(13,16,32,.9); border-bottom: 1px solid var(--line); backdrop-filter: blur(16px); }
.nav { height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 1.08rem; font-weight: 800; letter-spacing: .02em; }
.brand img { width: 42px; height: 42px; object-fit: cover; border-radius: 13px; }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a { color: var(--muted); padding: 10px 14px; border-radius: 10px; font-size: .94rem; }
.nav-links a:hover, .nav-links a.active { color: var(--text); background: rgba(121,242,208,.1); }
.nav-download { display: inline-flex; align-items: center; gap: 8px; padding: 12px 18px; border-radius: 10px; background: var(--mint); color: #081316; font-weight: 800; }
.nav-download:hover { background: #9bffe3; }
.hero { padding: 90px 0 72px; position: relative; overflow: hidden; }
.hero:before { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(121,242,208,.08), transparent 48%); pointer-events: none; }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; color: var(--mint); text-transform: uppercase; font-size: .78rem; letter-spacing: .16em; font-weight: 800; }
.eyebrow:before { content: ""; width: 26px; height: 2px; background: var(--mint); }
h1,h2,h3 { margin: 0; line-height: 1.2; letter-spacing: -.02em; }
h1 { font-size: clamp(2.5rem, 6vw, 5rem); margin-top: 18px; max-width: 650px; }
h2 { font-size: clamp(1.8rem, 3vw, 2.7rem); }
h3 { font-size: 1.08rem; }
.hero-copy { margin: 24px 0 32px; color: var(--muted); font-size: 1.08rem; max-width: 620px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 0; border-radius: 10px; padding: 13px 20px; background: var(--mint); color: #081316; font-weight: 800; cursor: pointer; }
.button:hover { transform: translateY(-1px); filter: brightness(1.06); }
.button.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.hero-art { justify-self: end; max-width: 360px; width: 100%; padding: 18px; border: 1px solid var(--line); border-radius: 26px; background: linear-gradient(145deg, rgba(121,242,208,.13), rgba(109,124,255,.14)); box-shadow: 0 30px 70px rgba(0,0,0,.35); }
.hero-art img { width: min(100%, 320px); margin: 0 auto; border-radius: 18px; }
.section { padding: 84px 0; border-top: 1px solid var(--line); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.section-kicker { color: var(--coral); font-size: .82rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.section-link { color: var(--mint); font-weight: 700; font-size: .95rem; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-card { min-height: 215px; padding: 24px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); }
.feature-card .icon { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 12px; color: var(--ink); background: var(--mint); font-weight: 900; margin-bottom: 20px; }
.feature-card:nth-child(2) .icon { background: var(--blue); color: #fff; }
.feature-card:nth-child(3) .icon { background: var(--coral); }
.feature-card p, .muted { color: var(--muted); margin: 11px 0 0; }
.stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.stat { padding: 24px; background: var(--panel); }
.stat strong { display: block; font-size: 2rem; color: var(--mint); }
.stat span { color: var(--muted); font-size: .9rem; }
.shot-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; align-items: start; }
.shot { padding: 8px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); }
.shot:nth-child(1), .shot:nth-child(4) { transform: translateY(18px); }
.shot img { width: 100%; max-width: 400px; border-radius: 10px; }
.shot figcaption { padding: 10px 4px 4px; color: var(--muted); font-size: .8rem; }
.story-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.story-card { padding: 26px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); }
.story-card blockquote { margin: 16px 0 0; color: #e4e8fa; font-size: 1.03rem; }
.story-card cite { display: block; margin-top: 12px; color: var(--mint); font-style: normal; font-size: .9rem; }
.page-hero { padding: 70px 0 46px; border-bottom: 1px solid var(--line); background: linear-gradient(120deg, rgba(121,242,208,.08), transparent 45%); }
.page-hero h1 { font-size: clamp(2.3rem, 5vw, 4rem); max-width: 820px; }
.page-hero .lede { max-width: 760px; color: var(--muted); margin: 18px 0 0; font-size: 1.06rem; }
.content-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 34px; align-items: start; }
.content-main { min-width: 0; }
.content-main h2 { margin: 42px 0 18px; font-size: 1.65rem; }
.content-main h2:first-child { margin-top: 0; }
.content-main p { color: #c8cee4; margin: 0 0 16px; }
.step-list { display: grid; gap: 12px; counter-reset: steps; }
.step { display: grid; grid-template-columns: 44px 1fr; gap: 15px; padding: 17px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.step:before { counter-increment: steps; content: counter(steps, decimal-leading-zero); color: var(--ink); background: var(--mint); width: 34px; height: 34px; display: grid; place-items: center; border-radius: 10px; font-weight: 900; }
.step h3 { margin-bottom: 5px; }
.step p { margin: 0; font-size: .95rem; }
.side-panel { position: sticky; top: 100px; padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); }
.side-panel h3 { margin-bottom: 14px; }
.side-panel a { display: flex; justify-content: space-between; padding: 12px 0; color: var(--muted); border-bottom: 1px solid var(--line); }
.side-panel a:last-child { border-bottom: 0; }
.side-panel a:hover { color: var(--mint); }
.faq-list { display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--line); border-radius: 14px; background: var(--panel); padding: 0 18px; }
.faq-item summary { cursor: pointer; list-style: none; padding: 17px 0; font-weight: 700; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:after { content: "+"; float: right; color: var(--mint); font-size: 1.3rem; }
.faq-item[open] summary:after { content: "−"; }
.faq-item p { color: var(--muted); margin: 0 0 18px; }
.callout { margin-top: 28px; padding: 24px; border-left: 3px solid var(--mint); background: rgba(121,242,208,.08); border-radius: 0 12px 12px 0; }
.site-footer { margin-top: 74px; padding: 44px 0 24px; border-top: 1px solid var(--line); background: #0a0d18; }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.footer-grid p { color: var(--muted); margin: 10px 0 0; font-size: .9rem; }
.footer-nav { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 16px; align-content: start; }
.footer-nav a { color: var(--muted); font-size: .9rem; }
.copyright { display: flex; justify-content: space-between; gap: 18px; margin-top: 34px; padding-top: 18px; border-top: 1px solid var(--line); color: #7f89aa; font-size: .82rem; }
@media (max-width: 900px) {
  .hero-grid, .content-grid { grid-template-columns: 1fr; }
  .hero-art { justify-self: start; max-width: 340px; }
  .shot-grid { grid-template-columns: repeat(3, 1fr); }
  .shot:nth-child(1), .shot:nth-child(4) { transform: none; }
  .side-panel { position: static; }
}
@media (max-width: 680px) {
  .wrap { width: min(calc(100% - 28px), var(--max)); }
  .nav { height: auto; min-height: 68px; flex-wrap: wrap; padding: 10px 0; }
  .nav-links { order: 3; width: 100%; overflow-x: auto; padding-bottom: 3px; }
  .nav-links a { white-space: nowrap; padding: 8px 10px; }
  .nav-download { padding: 10px 13px; font-size: .9rem; }
  .hero { padding: 60px 0 54px; }
  h1 { font-size: clamp(2.35rem, 13vw, 3.7rem); }
  .section { padding: 60px 0; }
  .section-head { display: block; }
  .section-link { display: inline-block; margin-top: 12px; }
  .feature-grid, .story-grid, .stats { grid-template-columns: 1fr; }
  .shot-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-nav { justify-content: flex-start; }
  .copyright { display: block; }
  .copyright span { display: block; margin-top: 6px; }
}