@charset "UTF-8";

:root {
  --blue: #2563EB;
  --blue-soft: #60A5FA;
  --orange: #F97316;
  --orange-soft: #FDBA74;
  --bg: #080D1A;
  --bg-2: #0B1224;
  --panel: #101A30;
  --panel-2: #0C1526;
  --line: #1E2C46;
  --ink: #F2F5FA;
  --muted: #93A3BA;
  --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) + 16px); }
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%; }
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(--blue-soft); 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 12px;
  color: var(--blue-soft);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.2px;
  line-height: 1.4;
}
.eyebrow::before { width: 15px; height: 2px; content: ""; background: linear-gradient(90deg, var(--blue), var(--orange)); }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 13, 26, .95);
  backdrop-filter: blur(12px);
}
.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: 18px;
}
.brand { display: inline-flex; align-items: center; flex: none; gap: 10px; font-size: 19px; font-weight: 900; letter-spacing: .2px; }
.brand img { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 8px; object-fit: contain; background: #070C17; }
.brand-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 19px;
  height: 19px;
  border-radius: 5px;
  background: linear-gradient(135deg, var(--blue), var(--orange));
  color: #fff;
  font-size: 10px;
  font-style: normal;
  font-weight: 900;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(12px, 1.8vw, 24px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; border-bottom: 2px solid transparent; color: #A1B2C8; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--orange); 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 16px;
  border: 1px solid transparent;
  border-radius: 7px;
  background: linear-gradient(120deg, var(--blue), #3B7BF6 52%, var(--orange));
  color: #fff;
  font-size: 12.5px;
  font-weight: 900;
  white-space: nowrap;
  transition: filter .18s ease;
}
.nav-download:hover { filter: brightness(1.12); }
.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: 左右双屏镜像 + 中央竖分割 + 世界编号胶囊 */
.hero { border-bottom: 1px solid var(--line); background: var(--bg); }
.mirror {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.pane { position: absolute; top: 0; bottom: 0; width: 50.1%; overflow: hidden; }
.pane-cold {
  left: 0;
  background:
    radial-gradient(360px 260px at 22% 24%, rgba(37, 99, 235, .55), transparent 72%),
    linear-gradient(160deg, #0C2350, #081020 78%);
}
.pane-warm {
  right: 0;
  background:
    radial-gradient(360px 260px at 78% 24%, rgba(249, 115, 22, .48), transparent 72%),
    linear-gradient(200deg, #4A2209, #180D06 78%);
}
.pane::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image: linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(70% 70% at 50% 40%, #000, transparent 80%);
}
.mirror::after {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  content: "";
  background: linear-gradient(180deg, transparent, rgba(96, 165, 250, .85) 18%, rgba(253, 186, 116, .85) 82%, transparent);
  z-index: 3;
}
.pane-tag {
  position: absolute;
  top: 20px;
  padding: 3px 10px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 1.4px;
}
.pane-cold .pane-tag { left: 26px; color: var(--blue-soft); }
.pane-warm .pane-tag { right: 26px; color: var(--orange-soft); }
.pane-caption {
  position: absolute;
  bottom: 22px;
  margin: 0;
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: 1px;
}
.pane-caption small { display: block; color: rgba(255, 255, 255, .5); font-size: 10px; font-weight: 500; letter-spacing: .6px; }
.pane-cold .pane-caption { left: 26px; color: #BBD1F3; }
.pane-warm .pane-caption { right: 26px; text-align: right; color: #F7D3B4; }
.mirror-copy {
  position: relative;
  z-index: 4;
  width: 100%;
  max-width: 760px;
  padding: 76px 24px 78px;
  text-align: center;
}
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 13px;
  padding: 4px 12px;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 999px;
  background: rgba(8, 13, 26, .5);
  color: #E4EDF9;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 1.2px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(44px, 6.6vw, 82px);
  font-weight: 900;
  letter-spacing: clamp(-1.6px, -.3vw, -2.6px);
  line-height: 1.02;
  text-shadow: 0 8px 30px rgba(0, 0, 0, .45);
}
.hero-subtitle { margin: 12px 0 0; color: #fff; font-size: clamp(16px, 1.9vw, 21px); font-weight: 800; line-height: 1.4; text-shadow: 0 2px 10px rgba(0, 0, 0, .5); }
.hero-lead { max-width: 540px; margin: 12px auto 0; color: #C9D6E8; font-size: 13.5px; }
.hero .button { margin-top: 22px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  gap: 12px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, filter .18s ease;
}
.button-primary { background: linear-gradient(120deg, var(--blue), #3B7BF6 50%, var(--orange)); color: #fff; box-shadow: 0 16px 30px rgba(37, 99, 235, .3); }
.button-primary:hover { transform: translateY(-2px); filter: brightness(1.1); }
.button-large { min-height: 54px; padding: 0 30px; font-size: 14.5px; }

.world-caps { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; padding: 16px 20px; margin: 0; list-style: none; background: var(--bg-2); }
.world-caps li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(16, 26, 48, .8);
  color: #C6D3E4;
  font-size: 12px;
  font-weight: 700;
}
.world-caps b { color: var(--blue-soft); font-family: var(--mono); font-size: 10px; letter-spacing: 1px; }
.world-caps li:nth-child(2) b { color: var(--orange-soft); }

/* features: 编号列表 */
.features { padding: 66px 0 70px; border-bottom: 1px solid var(--line); background: var(--bg); }
.section-heading { margin-bottom: 28px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(23px, 2.7vw, 33px); font-weight: 900; letter-spacing: -.5px; line-height: 1.32; }
.section-heading > p:last-child { max-width: 600px; margin: 11px 0 0; color: var(--muted); font-size: 13.5px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(190px, 290px); align-items: end; gap: 24px; }
.section-heading-split > p:last-child { margin: 0 0 3px; }
.feature-list { padding: 0; margin: 0; list-style: none; border-top: 1px solid var(--line); }
.feature-list li {
  display: grid;
  grid-template-columns: 74px minmax(0, .72fr) minmax(0, 1.28fr);
  align-items: center;
  gap: 10px 22px;
  padding: 20px 4px;
  border-bottom: 1px solid var(--line);
  transition: background .18s ease;
}
.feature-list li:hover { background: rgba(37, 99, 235, .07); }
.feature-list li > span { color: transparent; font-family: var(--mono); font-size: 26px; font-weight: 700; line-height: 1; -webkit-text-stroke: 1px rgba(96, 165, 250, .75); }
.feature-list h3 { margin: 0; font-size: 17px; font-weight: 900; }
.feature-list p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* shots: 2 列大图 */
.shots { padding: 68px 0 74px; background: var(--bg-2); }
.shot-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.shot-card { margin: 0; border: 1px solid var(--line); border-radius: 12px; background: var(--panel-2); overflow: hidden; }
.shot-card img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; object-position: center top; }
.shot-card figcaption { display: flex; align-items: baseline; gap: 9px; padding: 11px 15px 13px; border-top: 1px solid var(--line); }
.shot-card figcaption b { color: var(--orange-soft); 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: 66px 0 72px; border-top: 1px solid var(--line); background: var(--bg); }
.faq-heading { max-width: 640px; }
.faq-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; align-items: start; }
.faq-list details { border: 1px solid var(--line); border-left: 2px solid var(--blue); border-radius: 8px; background: var(--panel-2); }
.faq-list details:nth-child(even) { border-left-color: var(--orange); }
.faq-list details[open] { background: var(--panel); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 14px 16px; 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: 900; }
.faq-list summary i { position: relative; flex: none; width: 20px; height: 20px; border: 1px solid var(--line); border-radius: 5px; }
.faq-list summary i::before,
.faq-list summary i::after { position: absolute; top: 50%; left: 50%; width: 9px; height: 1.5px; content: ""; background: var(--blue-soft); 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 16px 15px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }

/* reviews: 双列错位 */
.reviews { padding: 68px 0 82px; border-top: 1px solid var(--line); background: var(--bg-2); }
.review-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; align-items: start; padding: 0; margin: 0; list-style: none; }
.review-card { padding: 16px 18px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); }
.review-card:nth-child(even) { margin-top: 26px; }
.review-meta { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 6px; }
.review-meta b { color: var(--orange-soft); font-size: 13px; font-weight: 900; }
.review-meta time { color: #6C7F97; font-family: var(--mono); font-size: 9.5px; }
.review-card p { margin: 0; color: #BFCCDD; font-size: 12.8px; line-height: 1.8; }

/* steps: 竖排右线 */
.steps { padding: 66px 0 72px; border-top: 1px solid var(--line); background: var(--bg); }
.step-list { position: relative; max-width: 780px; padding: 0; margin: 0; list-style: none; }
.step-list::before {
  position: absolute;
  top: 26px;
  bottom: 26px;
  right: 23px;
  width: 2px;
  content: "";
  background: linear-gradient(180deg, rgba(37, 99, 235, .85), rgba(249, 115, 22, .85));
}
.step-list li {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 64px;
  align-items: center;
  gap: 8px 18px;
  padding: 16px 0;
}
.step-list h3 { grid-column: 1; margin: 0; font-size: 16px; font-weight: 900; }
.step-list p { grid-column: 1; margin: 0; color: var(--muted); font-size: 12.8px; line-height: 1.75; }
.step-list span {
  grid-column: 2;
  grid-row: 1 / 3;
  justify-self: end;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: 2px solid var(--line);
  border-radius: 50%;
  background: var(--bg);
  color: var(--blue-soft);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  z-index: 2;
}
.step-list li:last-child span { color: var(--orange-soft); }

/* download: 左按钮右文 */
.download { padding: 26px 0 46px; background: var(--bg-2); }
.download-inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: clamp(20px, 4vw, 46px);
  padding: 34px clamp(20px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: 12px;
  background:
    linear-gradient(90deg, rgba(37, 99, 235, .16), rgba(249, 115, 22, .14)),
    var(--panel-2);
}
.download-copy { min-width: 0; }
.download h2 { max-width: 560px; }
.download-copy > p { max-width: 520px; margin: 10px 0 0; color: #B0C0D4; font-size: 13.5px; }
.download .button-large { flex: none; }
.download-notes { display: flex; flex-wrap: wrap; gap: 6px 18px; padding: 14px 0 0; margin: 14px 0 0; border-top: 1px solid var(--line); list-style: none; }
.download-notes li { color: #CBD8E7; font-family: var(--mono); font-size: 10.5px; }
.download-notes li::before { margin-right: 7px; content: "·"; color: var(--orange-soft); }

/* footer */
.site-footer { padding: 40px 0 48px; border-top: 1px solid var(--line); background: var(--bg-2); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px 36px; 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 20px; }
.footer-nav a { color: #B0C0D4; font-size: 12px; }
.footer-nav a:hover { color: var(--orange-soft); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; margin-top: 20px; padding-top: 16px; 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: #6C7F97; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1000px) {
  .feature-list li { grid-template-columns: 64px minmax(0, .8fr) minmax(0, 1.2fr); gap: 8px 18px; }
  .faq-list { grid-template-columns: 1fr; }
  .download-inner { grid-template-columns: 1fr; justify-items: start; }
  .download .button-large { width: 100%; }
}
@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); }
}
@media (max-width: 768px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .mirror-copy { padding: 66px 20px 68px; }
  .hero h1 { font-size: clamp(40px, 11vw, 58px); }
  .pane-caption { font-size: 11px; }
  .pane-caption small { font-size: 9px; }
  .section-heading-split { grid-template-columns: 1fr; gap: 10px; }
  .section-heading-split > p:last-child { margin: 0; }
  .feature-list li { grid-template-columns: 46px minmax(0, 1fr); align-items: start; gap: 4px 12px; }
  .feature-list li > span { font-size: 20px; }
  .feature-list h3, .feature-list p { grid-column: 2; }
  .review-list { grid-template-columns: 1fr; }
  .review-card:nth-child(even) { margin-top: 0; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .pane-tag { top: 12px; font-size: 8.5px; }
  .pane-cold .pane-tag { left: 12px; }
  .pane-warm .pane-tag { right: 12px; }
  .pane-caption { bottom: 14px; font-size: 10px; }
  .pane-cold .pane-caption { left: 12px; }
  .pane-warm .pane-caption { right: 12px; }
  .pane-caption small { display: none; }
  .mirror-copy { padding: 74px 14px 66px; }
  .hero-lead { font-size: 13px; }
  .hero .button { width: 100%; }
  .world-caps { gap: 6px; padding: 14px 12px; }
  .world-caps li { padding: 6px 11px; font-size: 11px; }
  .shot-grid { gap: 10px; }
  .shot-card figcaption { padding: 9px 10px 11px; gap: 6px; }
  .shot-card figcaption span { font-size: 12px; }
  .shot-card figcaption small { font-size: 9.5px; }
  .review-card { padding: 14px 15px; }
  .step-list li { grid-template-columns: minmax(0, 1fr) 52px; }
  .step-list::before { right: 18px; }
  .step-list span { width: 38px; height: 38px; font-size: 11px; }
  .download-inner { padding: 26px 16px; }
}
@media (max-width: 380px) {
  .brand { font-size: 15px; gap: 7px; }
  .brand img { width: 30px; height: 30px; }
  .brand-tag { display: none; }
  .nav-actions { gap: 6px; }
  .nav-download { min-height: 34px; padding: 0 8px; font-size: 10.5px; gap: 4px; }
  .nav-download svg { width: 14px; height: 14px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero h1 { font-size: 34px; }
  .hero-subtitle { font-size: 15px; }
  .hero-kicker { font-size: 9px; letter-spacing: .8px; }
  .faq-list summary { padding: 12px 13px; }
  .faq-list details p { padding: 0 13px 13px; }
}