@charset "UTF-8";

:root {
  --bg: #171226;
  --bg-2: #1D1730;
  --panel: #231B3A;
  --line: #382C55;
  --ink: #F4EFFC;
  --muted: #A79DC4;
  --yellow: #FFD447;
  --yellow-deep: #E7B72A;
  --pink: #FF7AB6;
  --shell: 1160px;
  --header-height: 70px;
  --mono: "JetBrains Mono", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 18px); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
svg { display: block; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--yellow); outline-offset: 4px; }
.page-shell { width: min(calc(100% - 46px), var(--shell)); margin: 0 auto; }
.eyebrow { display: inline-block; padding: 3px 10px; margin: 0 0 13px; border: 1px dashed #55426F; border-radius: 3px; color: var(--yellow); font-family: var(--mono); font-size: 10.5px; font-weight: 700; letter-spacing: 2px; }

/* header */
.site-header { position: sticky; top: 0; z-index: 60; border-bottom: 1px solid var(--line); background: rgba(23, 18, 38, .97); backdrop-filter: blur(12px); }
.nav-shell { display: flex; align-items: center; justify-content: space-between; width: min(calc(100% - 46px), var(--shell)); min-height: var(--header-height); margin: 0 auto; gap: 18px; }
.brand { display: inline-flex; align-items: center; flex: none; gap: 9px; font-size: 19px; font-weight: 900; letter-spacing: .2px; }
.brand img { width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 9px; object-fit: contain; background: #120E1F; }
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(11px, 1.7vw, 22px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; color: #B4A9CE; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { color: var(--yellow); }
.nav-actions { display: flex; align-items: center; flex: none; gap: 10px; }
.nav-download { display: inline-flex; align-items: center; justify-content: center; min-height: 41px; gap: 7px; padding: 0 15px; border-radius: 6px; background: var(--yellow); color: #241A02; font-size: 12.5px; font-weight: 900; white-space: nowrap; transition: background .18s ease; }
.nav-download:hover { background: #FFE381; }
.nav-download svg, .button svg { width: 17px; height: 17px; flex: none; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.menu-toggle { display: none; width: 41px; height: 41px; padding: 0; border: 1px solid var(--line); border-radius: 6px; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 17px; height: 2px; margin: 5px auto; background: var(--ink); transition: transform .18s ease; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* hero */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); background:
  radial-gradient(560px 340px at 90% 0%, rgba(255, 122, 182, .14), transparent 70%),
  radial-gradient(480px 320px at 6% 100%, rgba(255, 212, 71, .1), transparent 70%),
  linear-gradient(165deg, #221A38, var(--bg) 68%); }
.hero-grid { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, .92fr); align-items: center; gap: clamp(26px, 4vw, 54px); padding: 60px 0 66px; }
.hero-copy { min-width: 0; }
.hero-kicker { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 18px; color: #B9AED2; font-family: var(--mono); font-size: 11px; letter-spacing: 1.6px; }
.hero-kicker b { padding: 3px 8px; border-radius: 20px; background: rgba(255, 122, 182, .16); color: var(--pink); font-size: 9.5px; letter-spacing: 1.6px; }
.hero h1 { margin: 0; font-size: clamp(44px, 6.2vw, 76px); font-weight: 900; letter-spacing: clamp(-1px, -.3vw, -2px); line-height: 1.04; }
.hero-subtitle { margin: 16px 0 0; color: var(--yellow); font-size: clamp(17px, 2vw, 22px); font-weight: 800; }
.hero-lead { max-width: 520px; margin: 14px 0 0; color: var(--muted); font-size: 14.5px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 26px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; gap: 12px; padding: 0 24px; border: 1px solid transparent; border-radius: 6px; font-size: 14px; font-weight: 900; transition: transform .18s ease, background .18s ease; }
.button-primary { background: var(--yellow); color: #241A02; box-shadow: 0 14px 28px rgba(255, 212, 71, .18); }
.button-primary:hover { background: #FFE381; transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 30px; font-size: 15px; }
.text-link { color: #C9BFE0; border-bottom: 1px dashed #54436F; font-size: 13px; font-weight: 700; }
.text-link span { margin-left: 4px; color: var(--yellow); }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px 10px; padding: 0; margin: 28px 0 0; list-style: none; }
.hero-tags li { padding: 4px 11px; border-radius: 4px; background: rgba(56, 44, 85, .6); color: #BEB4D6; font-size: 11.5px; }
.hero-tags b { margin-right: 4px; color: var(--yellow); font-family: var(--mono); font-size: 12px; }

/* shelf panel */
.shelf-panel { min-width: 0; padding: 16px 16px 12px; border: 1px solid var(--line); border-radius: 14px; background: linear-gradient(170deg, #2A2144, #1C1530); box-shadow: 0 26px 50px rgba(0, 0, 0, .45); }
.shelf-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.shelf-head p { margin: 0; color: #C3B8DB; font-size: 11.5px; letter-spacing: .5px; }
.shelf-head b { padding: 1px 8px; border-radius: 3px; background: rgba(255, 212, 71, .16); color: var(--yellow); font-family: var(--mono); font-size: 11px; }
.shelf-row { display: grid; grid-template-columns: 40px repeat(3, minmax(0, 1fr)); align-items: end; gap: 7px; padding: 11px 0 9px; border-bottom: 4px solid #3F3160; }
.shelf-label { align-self: center; color: #8E82AC; font-size: 11px; writing-mode: vertical-rl; letter-spacing: 2px; }
.box { display: flex; flex-direction: column; justify-content: space-between; height: 62px; padding: 7px; border: 1px solid #4B3A6B; border-radius: 4px; background: linear-gradient(160deg, #32274F, #251D3D); }
.box i { color: #7C6F9B; font-family: var(--mono); font-size: 9px; font-style: normal; }
.box em { color: #D6CBE9; font-size: 10.5px; font-style: normal; line-height: 1.35; }
.box.is-hot { border-color: var(--yellow); background: linear-gradient(160deg, #4A3A1C, #2E2413); }
.box.is-hot em { color: var(--yellow); }
.box.is-empty { border-style: dashed; border-color: #473860; background: transparent; }
.box.is-empty em { color: #6E628A; }
.shelf-foot { margin: 10px 0 0; color: #7C6F9B; font-size: 10.5px; }

/* features */
.features { padding: 74px 0 78px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.section-heading { margin-bottom: 30px; }
.section-heading h2 { margin: 0; font-size: clamp(23px, 2.6vw, 32px); font-weight: 900; letter-spacing: -.4px; line-height: 1.36; }
.section-heading > p:last-child { max-width: 640px; margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(180px, 280px); align-items: end; gap: 22px; }
.section-heading-split > p:last-child { margin: 0 0 6px; }
.rack { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.rack-item { min-width: 0; padding: 20px 20px 24px; border: 1px solid var(--line); border-top: 3px solid #4B3A6B; border-radius: 4px 4px 10px 10px; background: var(--panel); }
.rack-item:hover { border-top-color: var(--yellow); }
.rack-code { display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; border-radius: 4px; background: rgba(255, 212, 71, .14); color: var(--yellow); font-family: var(--mono); font-size: 12px; font-weight: 700; }
.rack-item h3 { margin: 12px 0 7px; font-size: 16.5px; font-weight: 900; }
.rack-item p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.85; }

/* shots */
.shots { padding: 74px 0 84px; }
.shot-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 13px; }
.shot-card { min-width: 0; margin: 0; border: 1px solid var(--line); border-radius: 4px 4px 8px 8px; background: var(--panel); overflow: hidden; }
.shot-card img { width: 100%; height: auto; aspect-ratio: 9 / 16; object-fit: cover; }
.shot-card figcaption { display: flex; align-items: baseline; gap: 8px; padding: 10px 12px; border-top: 1px dashed #4B3A6B; }
.shot-card figcaption b { color: var(--yellow); font-family: var(--mono); font-size: 10px; letter-spacing: 1px; }
.shot-card figcaption span { font-size: 13px; font-weight: 900; }
.shot-card figcaption small { display: block; color: var(--muted); font-size: 10.5px; font-weight: 400; line-height: 1.6; }

/* faq */
.faq { padding: 74px 0 78px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-2); }
.faq-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; align-items: start; }
.faq-list details { min-width: 0; padding: 0 18px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 15px 0; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list h3 { margin: 0; font-size: 14.5px; font-weight: 900; line-height: 1.5; }
.faq-list summary i { position: relative; width: 20px; height: 20px; flex: none; border: 1px solid #4B3A6B; border-radius: 4px; background: rgba(255, 212, 71, .08); }
.faq-list summary i::before, .faq-list summary i::after { position: absolute; top: 50%; left: 50%; width: 8px; height: 1.5px; content: ""; background: var(--yellow); transform: translate(-50%, -50%); }
.faq-list summary i::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-list details[open] summary i::after { transform: translate(-50%, -50%) rotate(0deg); }
.faq-list details[open] summary i { background: var(--yellow); }
.faq-list details[open] summary i::before, .faq-list details[open] summary i::after { background: #241A02; }
.faq-list details p { padding: 12px 0 16px; margin: 0; border-top: 1px dashed #4B3A6B; color: var(--muted); font-size: 13px; line-height: 1.88; }

/* reviews: taped notes */
.reviews { padding: 74px 0 84px; }
.note-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px 16px; padding: 0; margin: 6px 0 0; list-style: none; }
.review-card { position: relative; min-width: 0; padding: 22px 18px 16px; border: 1px solid #4B3A6B; border-radius: 3px; background: #F6F1E4; color: #33294A; box-shadow: 0 12px 24px rgba(0, 0, 0, .28); }
.review-card:nth-child(odd) { transform: rotate(-.8deg); }
.review-card:nth-child(even) { transform: rotate(.7deg); }
.review-card::before { position: absolute; top: -8px; left: 50%; width: 52px; height: 15px; content: ""; background: rgba(255, 212, 71, .62); transform: translateX(-50%) rotate(-2deg); }
.review-card p { margin: 0 0 12px; font-size: 12.5px; line-height: 1.85; }
.note-meta { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 4px; padding-top: 9px; border-top: 1px dashed #C9BEDC; }
.note-meta b { font-size: 12px; font-weight: 900; }
.note-meta time { color: #7A6C93; font-family: var(--mono); font-size: 9.5px; }

/* steps */
.steps { padding: 74px 0 80px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-2); }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; padding: 0; margin: 0; list-style: none; counter-reset: st; }
.step-list li { position: relative; min-width: 0; padding: 22px 22px 24px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); counter-increment: st; }
.step-list li > span { display: none; }
.step-list li::before { display: block; margin-bottom: 12px; color: var(--yellow); font-family: var(--mono); font-size: 11px; letter-spacing: 2px; content: "STEP 0" counter(st); }
.step-list h3 { margin: 0 0 7px; font-size: 16px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }
.step-list li::after { position: absolute; top: 24px; right: 22px; color: #4B3A6B; font-family: var(--mono); font-size: 20px; content: "▦"; }

/* download */
.download { padding: 62px 0 68px; }
.download-panel { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(240px, 340px); align-items: center; gap: 30px; padding: 34px 32px 30px; border: 1px solid #4B3A6B; border-radius: 14px; background: linear-gradient(145deg, #2C2248, #1B1530); }
.download-panel::after { position: absolute; inset: 8px; border: 1px dashed #4B3A6B; border-radius: 9px; content: ""; pointer-events: none; }
.download-copy { position: relative; z-index: 2; }
.download-copy h2 { margin: 0; font-size: clamp(22px, 2.4vw, 30px); font-weight: 900; line-height: 1.36; }
.download-copy > p:last-child { margin: 10px 0 0; color: var(--muted); font-size: 13.5px; }
.download-act { position: relative; z-index: 2; min-width: 0; }
.download-act .button { width: 100%; }
.download-notes { display: flex; flex-wrap: wrap; gap: 6px 16px; padding: 0; margin: 14px 0 0; list-style: none; color: #AFA4C9; font-size: 11.5px; }
.download-notes li::before { margin-right: 6px; color: var(--yellow); content: "•"; }

/* footer */
.site-footer { padding: 44px 0 32px; border-top: 1px solid var(--line); background: #110D1D; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr) minmax(0, 1fr); gap: 22px; align-items: start; }
.footer-brand strong { display: block; margin-bottom: 6px; font-size: 15px; font-weight: 900; }
.footer-brand p { margin: 0; color: #7C6F9B; font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 12.5px; }
.footer-nav a { color: #B4A9CE; }
.footer-nav a:hover { color: var(--yellow); }
.footer-meta { font-size: 12px; color: #7C6F9B; text-align: right; }
.footer-meta p { margin: 0 0 6px; }
.footer-meta a { color: #B4A9CE; }
.disclaimer { grid-column: 1 / -1; padding-top: 16px; margin: 4px 0 0; border-top: 1px solid #2A2140; color: #6E628A; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; padding: 46px 0 50px; }
  .shelf-panel { max-width: 520px; }
  .rack { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .faq-list { grid-template-columns: 1fr; }
  .note-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .download-panel { grid-template-columns: 1fr; padding: 26px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-meta { text-align: left; }
}
@media (max-width: 860px) {
  .primary-nav { position: absolute; top: 100%; left: 0; right: 0; display: none; margin: 0; padding: 8px 22px 16px; border-bottom: 1px solid var(--line); background: #171226; }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav a { padding: 11px 0; border-bottom: 1px solid #2A2140; font-size: 14px; }
  .menu-toggle { display: block; }
  .section-heading-split { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .page-shell, .nav-shell { width: calc(100% - 34px); }
  .brand { font-size: 16px; }
  .hero h1 { font-size: 34px; }
  .hero-subtitle { font-size: 16px; }
  .hero-lead { font-size: 13.5px; }
  .shelf-row { grid-template-columns: 30px repeat(3, minmax(0, 1fr)); }
  .box { height: 56px; }
  .rack, .shot-grid, .note-grid, .step-list { grid-template-columns: 1fr; }
  .note:nth-child(n) { transform: none; }
  .review-card:nth-child(n) { transform: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .button, .button-large { width: 100%; }
  .text-link { display: none; }
  .download-panel { padding: 22px 18px; }
}
@media (max-width: 380px) {
  .brand span { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}