@charset "UTF-8";

:root {
  --night: #0b0b0f;
  --night-2: #121218;
  --card: #16161d;
  --line: #2a2a33;
  --ink: #ece9ea;
  --muted: #9c98a1;
  --red: #b3202c;
  --red-bright: #e03a44;
  --shell: 1140px;
  --header-height: 68px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 16px); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--night);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
svg { display: block; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--red-bright); outline-offset: 3px; }
.page-shell { width: min(calc(100% - 44px), var(--shell)); margin: 0 auto; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 11px;
  color: var(--red-bright);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 3px;
}
.eyebrow::before { width: 18px; height: 1px; content: ""; background: currentColor; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(11, 11, 15, .94);
  backdrop-filter: blur(14px);
}
.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 44px), 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: .5px; }
.brand img { width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 6px; object-fit: contain; background: #000; }
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(10px, 1.8vw, 24px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 6px 0; color: var(--muted); font-size: 13px; font-weight: 700; }
.primary-nav a:hover { color: var(--ink); }
.nav-actions { display: flex; align-items: center; flex: none; gap: 9px; }
.nav-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  gap: 7px;
  padding: 0 16px;
  border: 1px solid #7d1620;
  border-radius: 2px;
  background: var(--red);
  color: #fdeff0;
  font-size: 12.5px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease;
}
.nav-download:hover { background: #8d1924; }
.nav-download svg, .button svg { width: 17px; height: 17px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.menu-toggle { display: none; width: 40px; height: 40px; padding: 0; border: 1px solid var(--line); border-radius: 50%; 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: full dark screen + three shelf cells */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: min(760px, calc(100vh - var(--header-height)));
  padding: 46px 0 0;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(560px 420px at 78% 18%, rgba(179, 32, 44, .3), transparent 70%),
    radial-gradient(420px 320px at 6% 88%, rgba(179, 32, 44, .12), transparent 72%),
    linear-gradient(180deg, #0d0d12 0%, var(--night) 100%);
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image: repeating-linear-gradient(90deg, rgba(255, 255, 255, .028) 0 1px, transparent 1px 72px);
  pointer-events: none;
}
.badge-18 {
  position: absolute;
  top: 26px;
  left: clamp(16px, 4vw, 42px);
  padding: 4px 13px 5px;
  border: 1px solid var(--red);
  border-radius: 2px;
  color: var(--red-bright);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 1px;
  line-height: 1.4;
}
.hero-inner {
  position: relative;
  z-index: 2;
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(300px, .94fr);
  align-items: center;
  align-content: center;
  gap: clamp(26px, 4vw, 60px);
  padding: 8px 0 40px;
}
.hero-kicker { margin: 0 0 12px; color: var(--red-bright); font-size: 10.5px; font-weight: 800; letter-spacing: 3px; }
.hero h1 { margin: 0; font-size: clamp(42px, 6vw, 78px); font-weight: 900; letter-spacing: -1px; line-height: 1.02; }
.hero-subtitle { margin: 16px 0 0; color: #d9a9ae; font-size: clamp(17px, 1.9vw, 22px); font-weight: 800; letter-spacing: 1px; }
.hero-lead { max-width: 480px; margin: 12px 0 0; color: var(--muted); font-size: 13.5px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 24px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  gap: 12px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease;
}
.button-primary { background: var(--red); color: #fdeff0; box-shadow: 0 14px 26px rgba(179, 32, 44, .28); }
.button-primary:hover { background: #8d1924; transform: translateY(-2px); }
.button-large { min-height: 52px; padding: 0 30px; font-size: 15px; }
.text-link { color: #d8b3b6; border-bottom: 1px dashed #5c2a30; font-size: 13px; font-weight: 800; }
.text-link span { margin-left: 4px; color: var(--red-bright); }

.shelf-stage { position: relative; }
.shelf-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.shelf-cell {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 5px;
  height: 178px;
  padding: 0 6px 9px;
  border: 1px solid #2f2f39;
  background: linear-gradient(180deg, rgba(255, 255, 255, .035), rgba(0, 0, 0, .3));
  box-shadow: inset 0 -8px 0 #221a1c;
}
.spine { display: block; width: 12px; border-radius: 1px 1px 0 0; }
.sp-a { height: 104px; background: linear-gradient(180deg, #b3202c, #6d1219); }
.sp-b { height: 84px; background: linear-gradient(180deg, #3a3944, #1d1d24); }
.sp-c { height: 118px; background: linear-gradient(180deg, #8d2630, #4a1116); }
.sp-d { height: 72px; background: linear-gradient(180deg, #55525e, #2a2830); }
.sp-e { height: 96px; background: linear-gradient(180deg, #cf4650, #7a1a22); }
.sp-f { height: 88px; background: linear-gradient(180deg, #2f2f3a, #16161d); }
.shelf-tags { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; padding: 9px 0 0; margin: 0; list-style: none; }
.shelf-tags li { color: #7f7b85; font-size: 10.5px; letter-spacing: 3px; text-align: center; }
.hero-hint {
  position: relative;
  z-index: 2;
  padding: 12px clamp(16px, 4vw, 42px);
  margin: 0;
  border-top: 1px solid var(--line);
  color: #6e6a74;
  font-size: 11px;
  letter-spacing: .4px;
}

/* features: 2 x 2 */
.features { padding: 64px 0 68px; background: var(--night-2); border-bottom: 1px solid var(--line); }
.section-heading { margin-bottom: 28px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(24px, 2.7vw, 33px); font-weight: 900; letter-spacing: -.4px; line-height: 1.32; }
.section-heading > p:last-child { max-width: 620px; margin: 9px 0 0; color: var(--muted); font-size: 13.5px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(200px, 290px); align-items: end; gap: 22px; }
.section-heading-split > p:last-child { margin: 0 0 4px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.feature-card { padding: 24px 22px; border: 1px solid var(--line); background: var(--card); }
.feature-no { display: block; margin-bottom: 9px; color: var(--red-bright); font-size: 11px; font-weight: 800; letter-spacing: 2px; }
.feature-card h3 { margin: 0 0 6px; font-size: 17px; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.82; }

/* shots: four narrow samples */
.shots { padding: 64px 0 70px; }
.sample-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.sample-card { margin: 0; border: 1px solid var(--line); background: var(--card); overflow: hidden; }
.sample-card img { width: 100%; height: auto; aspect-ratio: 3 / 4.5; object-fit: cover; object-position: center 20%; }
.sample-card:nth-child(2) img { object-position: center 30%; }
.sample-card:nth-child(4) img { object-position: center 14%; }
.sample-card figcaption { padding: 10px 11px 12px; border-top: 1px solid var(--line); }
.sample-card figcaption b { display: block; margin-bottom: 2px; color: var(--red-bright); font-size: 9.5px; font-weight: 800; letter-spacing: 1px; }
.sample-card figcaption span { display: flex; flex-direction: column; font-size: 12.5px; font-weight: 800; line-height: 1.42; }
.sample-card figcaption small { color: var(--muted); font-size: 10px; font-weight: 500; }

/* faq */
.faq { padding: 62px 0 68px; border-top: 1px solid var(--line); background: var(--night-2); }
.faq-layout { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(20px, 3.4vw, 50px); }
.faq-heading { position: sticky; top: calc(var(--header-height) + 24px); align-self: start; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 14.5px; font-weight: 800; }
.faq-list summary i { position: relative; flex: none; width: 18px; height: 18px; }
.faq-list summary i::before,
.faq-list summary i::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 11px;
  height: 1.5px;
  content: "";
  background: var(--red-bright);
  transform: translate(-50%, -50%);
}
.faq-list summary i::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform .2s ease; }
.faq-list details[open] summary i::after { transform: translate(-50%, -50%) rotate(0); }
.faq-list details p { padding: 0 22px 15px 0; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }

/* reviews */
.reviews { padding: 62px 0 68px; }
.review-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; padding: 0; margin: 0; list-style: none; }
.review-card { padding: 17px 19px 18px; border: 1px solid var(--line); border-left: 2px solid var(--red); background: var(--card); }
.review-meta { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 5px; padding-bottom: 8px; margin-bottom: 8px; border-bottom: 1px dashed var(--line); }
.review-meta b { color: #e0a8ad; font-size: 13px; font-weight: 900; }
.review-meta time { color: #6d6972; font-size: 10px; letter-spacing: .3px; }
.review-card p { margin: 0; color: #b9b5be; font-size: 13px; line-height: 1.78; }

/* steps */
.steps { padding: 60px 0 66px; border-top: 1px solid var(--line); background: var(--night-2); }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; padding: 0; margin: 0; list-style: none; }
.step-list li { padding: 22px 20px; border: 1px solid var(--line); background: var(--card); }
.step-list span { display: block; margin-bottom: 8px; color: var(--red-bright); font-size: 26px; font-weight: 900; letter-spacing: 1px; line-height: 1; }
.step-list h3 { margin: 0 0 5px; font-size: 15.5px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.78; }

/* download */
.download { padding: 26px 0 44px; }
.download-inner {
  padding: 40px clamp(22px, 4vw, 46px) 34px;
  border: 1px solid #3a1a1f;
  background:
    radial-gradient(380px 220px at 94% 0%, rgba(179, 32, 44, .38), transparent 72%),
    linear-gradient(140deg, #15151c, #0f0f14);
}
.download h2 { color: #f3e6e7; }
.download-inner > p:last-of-type { margin: 10px 0 20px; color: var(--muted); font-size: 13px; }
.download .button-primary { box-shadow: none; }
.download-notes { display: flex; flex-wrap: wrap; gap: 6px 22px; padding: 16px 0 0; margin: 22px 0 0; border-top: 1px solid var(--line); list-style: none; }
.download-notes li { color: #7f7b85; font-size: 11px; }
.download-notes li::before { margin-right: 6px; content: "／"; color: var(--red-bright); }

/* footer */
.site-footer { padding: 36px 0 44px; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px 38px; align-items: start; }
.footer-brand strong { font-size: 17px; font-weight: 900; }
.footer-brand p { margin: 3px 0 0; color: var(--muted); font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 7px 20px; }
.footer-nav a { color: #bdb9c2; font-size: 12px; }
.footer-nav a:hover { color: var(--red-bright); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 7px 18px; margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); color: #6d6972; font-size: 11.5px; }
.footer-meta p { margin: 0; }
.footer-meta a { color: #6d6972; }
.disclaimer { grid-column: 1 / -1; margin: 0; color: #6d6972; font-size: 11px; line-height: 1.8; }

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: minmax(0, 1fr) minmax(260px, .8fr); gap: 24px; }
  .shelf-cell { height: 150px; }
  .sample-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sample-card img { aspect-ratio: 3 / 3.6; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-heading { position: static; }
}
@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    padding: 8px 22px 14px;
    border-bottom: 1px solid var(--line);
    background: var(--night);
    box-shadow: 0 16px 26px rgba(0, 0, 0, .6);
  }
  .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 var(--line); }
  .hero { min-height: 0; padding: 44px 0 0; }
  .hero-inner { grid-template-columns: 1fr; padding-bottom: 30px; }
  .shelf-stage { max-width: 460px; }
  .step-list { grid-template-columns: 1fr; }
  .review-list { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 30px); }
  .hero h1 { font-size: 40px; }
  .hero-subtitle { font-size: 15.5px; }
  .feature-grid { grid-template-columns: 1fr; }
  .sample-grid { grid-template-columns: 1fr; }
  .sample-card img { aspect-ratio: 3 / 3.4; }
  .section-heading-split { grid-template-columns: 1fr; gap: 8px; }
  .section-heading-split > p:last-child { margin: 0; }
  .download .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 16px; gap: 7px; }
  .brand img { width: 28px; height: 28px; }
  .nav-actions { gap: 7px; }
  .nav-download { min-height: 34px; padding: 0 9px; font-size: 11px; gap: 4px; }
  .nav-download svg { width: 13px; height: 13px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero h1 { font-size: 34px; }
  .shelf-cell { height: 120px; }
  .spine { width: 9px; }
  .sp-a { height: 70px; }
  .sp-b { height: 56px; }
  .sp-c { height: 80px; }
  .sp-d { height: 48px; }
  .sp-e { height: 66px; }
  .sp-f { height: 60px; }
}