@charset "UTF-8";

:root {
  --bg: #0d0f26;
  --bg-2: #11142f;
  --panel: #181c40;
  --panel-2: #1d2250;
  --line: #2c3268;
  --ink: #eef0ff;
  --muted: #a3aad2;
  --indigo: #3a3fa8;
  --pink: #ff6fae;
  --shell: 1180px;
  --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;
}
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: 3px solid var(--pink); outline-offset: 4px; }
.page-shell { width: min(calc(100% - 48px), var(--shell)); margin: 0 auto; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--pink);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.4px;
  line-height: 1.4;
}
.eyebrow::before { width: 16px; height: 2px; content: ""; background: currentColor; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(13, 15, 38, .94);
  backdrop-filter: blur(14px);
}
.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 48px), var(--shell));
  min-height: var(--header-height);
  margin: 0 auto;
  gap: 20px;
}
.brand { display: inline-flex; align-items: center; flex: none; gap: 10px; font-size: 22px; font-weight: 900; letter-spacing: -.2px; }
.brand img { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 12px; object-fit: contain; background: var(--panel); }
.brand-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 19px;
  border-radius: 6px;
  background: var(--pink);
  color: #2a0f1e;
  font-family: var(--mono);
  font-size: 9px;
  font-style: normal;
  font-weight: 900;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(12px, 1.9vw, 25px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; border-bottom: 2px solid transparent; color: #b3b9dd; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--pink); color: #fff; }
.nav-actions { display: flex; align-items: center; flex: none; gap: 10px; }
.nav-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  gap: 8px;
  padding: 0 18px;
  border: 1px solid var(--pink);
  border-radius: 10px;
  background: var(--pink);
  color: #2a0f1e;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-download:hover { background: transparent; color: var(--pink); }
.nav-download svg, .button svg { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 0; border: 1px solid var(--line); border-radius: 10px; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 18px; 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: copy + branch tree */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(560px 380px at 92% 0%, rgba(255, 111, 174, .22), transparent 70%),
    radial-gradient(520px 420px at 4% 96%, rgba(58, 63, 168, .55), transparent 72%),
    linear-gradient(180deg, #151838 0%, var(--bg) 100%);
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image: radial-gradient(rgba(255, 255, 255, .12) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(180deg, #000, transparent 82%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  align-items: center;
  gap: clamp(24px, 4vw, 56px);
  padding: 58px 0 30px;
}
.hero-copy { min-width: 0; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 16px;
  color: #b8bee0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 1.3px;
}
.hero-kicker b {
  padding: 3px 8px;
  border-radius: 5px;
  background: rgba(255, 111, 174, .16);
  border: 1px solid rgba(255, 111, 174, .45);
  color: var(--pink);
  font-size: 9.5px;
  font-weight: 900;
  letter-spacing: 1.2px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(56px, 8.4vw, 104px);
  font-weight: 900;
  letter-spacing: clamp(-2px, -.4vw, -4px);
  line-height: .94;
}
.hero-subtitle { margin: 18px 0 0; color: var(--pink); font-size: clamp(18px, 2.1vw, 24px); font-weight: 800; line-height: 1.4; }
.hero-lead { max-width: 500px; margin: 14px 0 0; color: var(--muted); font-size: 14.5px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; margin-top: 28px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  gap: 14px;
  padding: 0 28px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.button-primary { background: var(--pink); color: #2a0f1e; box-shadow: 0 14px 30px rgba(255, 111, 174, .22); }
.button-primary:hover { background: #ff8fbe; transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 34px; font-size: 15px; }
.text-link { color: #ccd2ef; border-bottom: 1px dashed #4e558f; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--pink); }

.tree-panel {
  position: relative;
  padding: 16px;
  border: 1px solid rgba(255, 111, 174, .3);
  border-radius: 16px;
  background: linear-gradient(160deg, rgba(58, 63, 168, .5), rgba(24, 28, 64, .92) 62%);
  box-shadow: 0 26px 50px rgba(0, 0, 0, .45);
}
.tree-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-bottom: 12px; border-bottom: 1px dashed rgba(255, 111, 174, .28); color: #c7cdf0; font-family: var(--mono); font-size: 10.5px; letter-spacing: .6px; }
.tree-head span:last-child { color: var(--pink); }
.tree-root { display: flex; align-items: center; gap: 12px; padding: 11px; margin-top: 14px; border: 1px dashed rgba(255, 111, 174, .45); border-radius: 12px; background: rgba(13, 15, 38, .5); }
.tree-root img { width: 56px; height: 72px; flex: none; border-radius: 8px; object-fit: cover; object-position: center 18%; }
.tree-root b { display: block; font-size: 13px; font-weight: 900; }
.tree-root span { display: block; margin-top: 3px; color: var(--muted); font-size: 11.5px; line-height: 1.5; }
.tree-branches { position: relative; padding-left: 20px; margin-top: 4px; }
.tree-branches::before { position: absolute; top: 0; bottom: 26px; left: 7px; width: 1px; content: ""; background: linear-gradient(180deg, rgba(255, 111, 174, .7), rgba(255, 111, 174, .1)); }
.tree-node { position: relative; padding: 9px 12px; margin-top: 10px; border: 1px solid rgba(255, 255, 255, .1); border-radius: 10px; background: rgba(24, 28, 64, .9); }
.tree-node::before { position: absolute; top: 50%; left: -21px; width: 21px; height: 1px; content: ""; background: rgba(255, 111, 174, .45); }
.tree-node b { display: block; color: #fff; font-size: 12.5px; font-weight: 900; }
.tree-node span { display: block; margin-top: 2px; color: var(--muted); font-size: 11px; line-height: 1.45; }
.tree-node-thumb { display: flex; align-items: center; gap: 10px; }
.tree-node-thumb img { width: 42px; height: 56px; flex: none; border-radius: 6px; object-fit: cover; object-position: center 20%; }

.choice-bar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0 0 42px;
}
.choice-label { margin-right: 6px; color: #8f97c4; font-family: var(--mono); font-size: 10.5px; letter-spacing: 1.4px; }
.choice-chip {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 20px;
  border: 1px solid rgba(255, 111, 174, .4);
  border-radius: 8px;
  background: rgba(58, 63, 168, .26);
  color: #e6e9ff;
  font-size: 12.5px;
  font-weight: 800;
}
.choice-hint { margin-left: auto; color: #7f88b6; font-size: 11px; }

/* features: four across */
.features { padding: 76px 0 82px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.section-heading { margin-bottom: 34px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(25px, 2.9vw, 36px); font-weight: 900; letter-spacing: -.9px; line-height: 1.3; }
.section-heading > p:last-child { max-width: 620px; margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(210px, 300px); align-items: end; gap: 28px; }
.section-heading-split > p:last-child { margin: 0 0 5px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.feature-card {
  position: relative;
  padding: 24px 20px 24px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--pink);
  border-radius: 10px;
  background: var(--panel);
}
.feature-no { display: block; margin-bottom: 40px; color: rgba(255, 111, 174, .7); font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 1.6px; }
.feature-card h3 { margin: 0 0 8px; font-size: 17px; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.8; }

/* shots: two by two */
.shots { padding: 76px 0 84px; }
.shot-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; width: min(100%, 860px); margin: 0 auto; }
.shot-card { margin: 0; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); overflow: hidden; }
.shot-card img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; object-position: center 10%; }
.shot-card figcaption { display: flex; align-items: baseline; gap: 10px; padding: 12px 14px 13px; border-top: 1px solid var(--line); }
.shot-card figcaption b { color: var(--pink); font-family: var(--mono); font-size: 10px; }
.shot-card figcaption span { display: flex; flex-direction: column; font-size: 13px; font-weight: 800; line-height: 1.4; }
.shot-card figcaption small { color: var(--muted); font-size: 10.5px; font-weight: 500; }

/* faq */
.faq { padding: 74px 0 80px; border-top: 1px solid var(--line); background: var(--bg-2); }
.faq-layout { display: grid; grid-template-columns: minmax(0, .76fr) minmax(0, 1.24fr); gap: clamp(26px, 4vw, 56px); }
.faq-heading { position: sticky; top: calc(var(--header-height) + 26px); 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: 16px; padding: 18px 0; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 15.5px; font-weight: 900; }
.faq-list summary i { position: relative; flex: none; width: 22px; height: 22px; border: 1px solid var(--line); border-radius: 6px; }
.faq-list summary i::before,
.faq-list summary i::after { position: absolute; top: 50%; left: 50%; width: 9px; height: 1.5px; content: ""; background: var(--pink); 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 30px 18px 0; margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.85; }

/* reviews: single column rows */
.reviews { padding: 76px 0 82px; }
.review-list { padding: 0; margin: 0; list-style: none; border-top: 1px solid var(--line); }
.review-card { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 22px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.review-meta { display: flex; flex-direction: column; gap: 4px; padding-left: 14px; border-left: 2px solid var(--pink); }
.review-meta b { color: var(--pink); font-size: 13.5px; font-weight: 900; }
.review-meta time { color: #7f88b6; font-family: var(--mono); font-size: 10.5px; }
.review-card p { margin: 0; color: #c0c6e2; font-size: 13.5px; line-height: 1.85; }

/* steps */
.steps { padding: 72px 0 78px; border-top: 1px solid var(--line); background: var(--bg-2); }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; padding: 0; margin: 0; list-style: none; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.step-list li { padding: 26px 22px 26px; border-right: 1px solid var(--line); background: var(--panel); }
.step-list li:last-child { border-right: 0; }
.step-list span { display: block; margin-bottom: 10px; color: var(--pink); font-family: var(--mono); font-size: 21px; font-weight: 700; line-height: 1; }
.step-list h3 { margin: 0 0 7px; font-size: 16.5px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* download */
.download { padding: 26px 0; }
.download-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px 40px;
  padding: 48px clamp(24px, 5vw, 58px);
  border: 1px solid rgba(255, 111, 174, .35);
  border-radius: 14px;
  background:
    radial-gradient(420px 260px at 100% 0%, rgba(255, 111, 174, .3), transparent 72%),
    linear-gradient(118deg, #2b2f7e, #3a3fa8 62%, #4b3f95);
}
.download .eyebrow { color: #ffc4dc; grid-column: 1; }
.download h2 { grid-column: 1; color: #fff; }
.download-inner > p { grid-column: 1; max-width: 520px; margin: 0; color: #d3d7f7; font-size: 14px; }
.download .button-primary { grid-column: 2; grid-row: 1 / span 3; align-self: center; background: var(--pink); color: #2a0f1e; box-shadow: 0 14px 26px rgba(12, 8, 24, .35); }
.download .button-primary:hover { background: #ff8fbe; }
.download-notes { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 8px 24px; padding: 20px 0 0; margin: 4px 0 0; border-top: 1px solid rgba(255, 255, 255, .18); list-style: none; }
.download-notes li { color: #d8dcf8; font-family: var(--mono); font-size: 11px; }
.download-notes li::before { margin-right: 8px; content: "◈"; color: var(--pink); }

/* footer */
.site-footer { padding: 44px 0 52px; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 20px 40px; align-items: start; }
.footer-brand strong { font-size: 18px; font-weight: 900; }
.footer-brand p { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.footer-nav a { color: #b7bddf; font-size: 12px; }
.footer-nav a:hover { color: var(--pink); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.footer-meta p { margin: 0; }
.footer-meta a { color: var(--muted); }
.disclaimer { grid-column: 1 / -1; margin: 0; color: #7f88b6; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 360px); gap: 26px; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-no { margin-bottom: 18px; }
}
@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    padding: 8px 24px 16px;
    border-bottom: 1px solid var(--line);
    background: var(--bg);
    box-shadow: 0 16px 26px rgba(0, 0, 0, .55);
  }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .hero-grid { grid-template-columns: 1fr; padding: 44px 0 24px; }
  .tree-panel { max-width: 440px; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-heading { position: static; }
  .step-list { grid-template-columns: 1fr; }
  .step-list li { border-right: 0; border-bottom: 1px solid var(--line); }
  .step-list li:last-child { border-bottom: 0; }
  .download-inner { grid-template-columns: 1fr; }
  .download .button-primary { grid-column: 1; grid-row: auto; justify-self: start; }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .hero h1 { font-size: clamp(46px, 15vw, 64px); }
  .hero-lead { font-size: 14px; }
  .feature-grid { grid-template-columns: 1fr; }
  .shot-grid { grid-template-columns: 1fr; }
  .shot-card img { aspect-ratio: 4 / 5; }
  .review-card { grid-template-columns: 1fr; gap: 8px; }
  .review-meta { flex-direction: row; align-items: baseline; justify-content: space-between; padding-left: 10px; }
  .section-heading-split { grid-template-columns: 1fr; gap: 10px; }
  .section-heading-split > p:last-child { margin: 0; }
  .choice-hint { margin-left: 0; width: 100%; }
  .download-notes li { font-size: 10.5px; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 17px; gap: 7px; }
  .brand img { width: 30px; height: 30px; }
  .brand-tag { display: none; }
  .nav-actions { gap: 8px; }
  .nav-download { min-height: 34px; padding: 0 10px; font-size: 11px; gap: 5px; }
  .nav-download svg { width: 14px; height: 14px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero h1 { font-size: 44px; }
  .hero-subtitle { font-size: 16px; }
  .button { width: 100%; }
  .tree-panel { padding: 12px; }
}