@charset "UTF-8";

:root {
  --teal: #14B8A6;
  --teal-light: #5EEAD4;
  --bg: #0F172A;
  --bg-2: #0A1220;
  --panel: #142033;
  --panel-2: #101A2B;
  --line: #24334A;
  --ink: #F1F6F8;
  --muted: #94A9B8;
  --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) + 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(--teal); 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(--teal);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.2px;
  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(15, 23, 42, .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: 21px; font-weight: 900; letter-spacing: .3px; }
.brand img { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 10px; object-fit: contain; background: #0B1524; }
.brand-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: var(--teal);
  color: #04211E;
  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: #A2B4C4; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--teal); 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(--teal);
  border-radius: 999px;
  background: var(--teal);
  color: #04211E;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-download:hover { background: transparent; color: var(--teal); }
.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: 左文案 + 右竖向链环 */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(560px 340px at 84% 4%, rgba(20, 184, 166, .2), transparent 72%),
    linear-gradient(180deg, #12203A 0%, var(--bg) 100%);
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image: linear-gradient(90deg, rgba(94, 234, 212, .05) 0 1px, transparent 1px 60px);
  mask-image: linear-gradient(180deg, #000, transparent 88%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
  align-items: center;
  gap: clamp(24px, 4vw, 54px);
  padding: 58px 0 60px;
}
.hero-copy { min-width: 0; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 14px;
  padding: 4px 12px;
  border: 1px solid rgba(20, 184, 166, .4);
  border-radius: 999px;
  color: var(--teal-light);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 1.2px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(54px, 7.6vw, 96px);
  font-weight: 900;
  letter-spacing: clamp(-2px, -.35vw, -3px);
  line-height: .98;
}
.hero-subtitle { margin: 14px 0 0; color: var(--teal); font-size: clamp(17px, 2vw, 22px); font-weight: 800; line-height: 1.4; }
.hero-lead { max-width: 520px; margin: 13px 0 0; color: var(--muted); font-size: 14px; }
.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: 50px;
  gap: 12px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.button-primary { background: var(--teal); color: #04211E; box-shadow: 0 14px 28px rgba(20, 184, 166, .24); }
.button-primary:hover { background: var(--teal-light); transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 34px; font-size: 15px; }
.text-link { color: #BFD3D9; border-bottom: 1px dashed #2C4A58; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--teal); }

.chain { position: relative; min-width: 0; padding: 4px 0; }
.chain-list { display: flex; flex-direction: column; gap: 14px; padding: 0; margin: 0; list-style: none; }
.chain-list li {
  position: relative;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  align-items: center;
  gap: 4px 14px;
  padding: 11px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(120deg, rgba(20, 184, 166, .12), rgba(16, 26, 43, .9) 58%);
}
.chain-list li::before {
  position: absolute;
  bottom: -15px;
  left: 41px;
  width: 2px;
  height: 15px;
  content: "";
  background: linear-gradient(180deg, var(--teal), rgba(20, 184, 166, .1));
}
.chain-list li:last-child::before { display: none; }
.chain-list i {
  grid-row: 1 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border: 2px solid rgba(20, 184, 166, .65);
  border-radius: 50%;
  background: rgba(10, 18, 32, .8);
  color: var(--teal-light);
  font-family: var(--mono);
  font-size: 15px;
  font-style: normal;
  font-weight: 700;
  box-shadow: 0 0 0 5px rgba(20, 184, 166, .08);
}
.chain-list b { font-size: 15px; font-weight: 900; }
.chain-list small { color: var(--muted); font-size: 11.5px; }
.chain-tail { display: flex; align-items: center; gap: 8px; padding-left: 40px; margin-top: 14px; color: var(--teal); font-family: var(--mono); font-size: 10.5px; letter-spacing: 1.4px; }
.chain-tail svg { width: 20px; height: 20px; flex: none; }

/* features: 横滑条 */
.features { padding: 66px 0 62px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.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-rail {
  display: flex;
  gap: 12px;
  padding: 2px 2px 12px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
}
.feature-card {
  flex: 0 0 300px;
  scroll-snap-align: start;
  padding: 22px 20px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  border-bottom: 2px solid var(--teal);
}
.feature-no { display: block; margin-bottom: 10px; color: var(--teal); font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 1.5px; }
.feature-card h3 { margin: 0 0 7px; font-size: 17px; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: 12.8px; line-height: 1.8; }
.rail-hint { margin: 4px 0 0; color: #6D8494; font-family: var(--mono); font-size: 10.5px; letter-spacing: 1.2px; }

/* shots: 4 列不同高 */
.shots { padding: 68px 0 74px; }
.shot-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; align-items: start; }
.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; object-fit: cover; object-position: center top; }
.shot-card:nth-child(1) { margin-top: 24px; }
.shot-card:nth-child(1) img { aspect-ratio: 9 / 16; }
.shot-card:nth-child(2) img { aspect-ratio: 4 / 5; }
.shot-card:nth-child(3) { margin-top: 42px; }
.shot-card:nth-child(3) img { aspect-ratio: 3 / 4; }
.shot-card:nth-child(4) { margin-top: 10px; }
.shot-card:nth-child(4) img { aspect-ratio: 9 / 16; }
.shot-card figcaption { display: flex; align-items: baseline; gap: 8px; padding: 10px 12px 12px; border-top: 1px solid var(--line); }
.shot-card figcaption b { color: var(--teal); font-family: var(--mono); font-size: 10px; }
.shot-card figcaption span { display: flex; flex-direction: column; font-size: 12.5px; font-weight: 800; line-height: 1.4; }
.shot-card figcaption small { color: var(--muted); font-size: 10px; font-weight: 500; }

/* faq */
.faq { padding: 64px 0 72px; border-top: 1px solid var(--line); background: var(--bg-2); }
.faq-layout { display: grid; grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr); gap: clamp(24px, 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: 16px; padding: 16px 0; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 15px; font-weight: 900; }
.faq-list summary i { position: relative; flex: none; width: 22px; height: 22px; border: 1px solid var(--line); border-radius: 50%; }
.faq-list summary i::before,
.faq-list summary i::after { position: absolute; top: 50%; left: 50%; width: 9px; height: 1.5px; content: ""; background: var(--teal); 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 26px 16px 0; margin: 0; color: var(--muted); font-size: 13.2px; line-height: 1.85; }

/* reviews: 单列带头像 */
.reviews { padding: 68px 0 74px; }
.review-list { display: grid; gap: 10px; padding: 0; margin: 0; list-style: none; }
.review-card {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: start;
  gap: 14px;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}
.review-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(20, 184, 166, .45);
  border-radius: 50%;
  background: radial-gradient(circle at 34% 28%, rgba(20, 184, 166, .34), rgba(10, 18, 32, .9) 72%);
  color: var(--teal-light);
  font-size: 15px;
  font-weight: 900;
}
.review-body { min-width: 0; }
.review-meta { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 5px; }
.review-meta b { color: var(--teal); font-size: 13px; font-weight: 900; }
.review-meta time { color: #6D8494; font-family: var(--mono); font-size: 9.5px; }
.review-card p { margin: 0; color: #C0D2D9; font-size: 13px; line-height: 1.8; }

/* steps: 横排卡 */
.steps { padding: 64px 0 70px; border-top: 1px solid var(--line); background: var(--bg-2); }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; padding: 0; margin: 0; list-style: none; }
.step-list li { padding: 20px 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.step-list span { display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; margin-bottom: 10px; border-radius: 50%; background: var(--teal); color: #04211E; font-family: var(--mono); font-size: 12px; font-weight: 700; }
.step-list h3 { margin: 0 0 6px; font-size: 15.5px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 12.6px; line-height: 1.75; }

/* download: 上按钮下文 */
.download { padding: 40px 0 46px; }
.download-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px clamp(22px, 4vw, 52px) 34px;
  border: 1px solid rgba(20, 184, 166, .35);
  border-radius: 16px;
  text-align: center;
  background:
    radial-gradient(420px 200px at 50% -10%, rgba(20, 184, 166, .24), transparent 74%),
    linear-gradient(160deg, #16263C, #101B2C 78%);
}
.download h2 { margin-top: 20px; }
.download-inner > p { max-width: 540px; margin: 10px 0 0; color: #AEBFCB; font-size: 13.5px; }
.download-notes { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 22px; padding: 16px 0 0; margin: 18px 0 0; border-top: 1px solid rgba(20, 184, 166, .22); list-style: none; }
.download-notes li { color: var(--teal-light); font-family: var(--mono); font-size: 10.5px; }
.download-notes li::before { margin-right: 7px; content: "·"; color: var(--teal); }

/* footer */
.site-footer { padding: 40px 0 48px; border-top: 1px solid var(--line); }
.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: #AEBFCB; font-size: 12px; }
.footer-nav a:hover { color: var(--teal); }
.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: #6D8494; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1000px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 330px); gap: 26px; padding: 46px 0 50px; }
  .feature-card { flex-basis: 270px; }
  .shot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shot-card:nth-child(1), .shot-card:nth-child(3) { margin-top: 0; }
  .shot-card:nth-child(2), .shot-card:nth-child(4) { margin-top: 22px; }
  .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 24px 16px;
    border-bottom: 1px solid var(--line);
    background: var(--bg);
    box-shadow: 0 16px 26px rgba(0, 0, 0, .5);
  }
  .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); }
  .hero-grid { grid-template-columns: 1fr; padding: 38px 0 42px; gap: 30px; }
  .hero h1 { font-size: clamp(46px, 13vw, 68px); }
  .chain-list { gap: 12px; }
  .chain-list li::before { bottom: -13px; height: 13px; }
  .section-heading-split { grid-template-columns: 1fr; gap: 10px; }
  .section-heading-split > p:last-child { margin: 0; }
  .feature-card { flex-basis: 244px; }
  .step-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .hero-actions { gap: 14px; }
  .hero .button { width: 100%; }
  .chain-list li { grid-template-columns: 44px minmax(0, 1fr); padding: 9px 12px; }
  .chain-list i { width: 44px; height: 44px; font-size: 13px; }
  .chain-list li::before { left: 35px; }
  .chain-tail { padding-left: 34px; }
  .shot-grid { gap: 9px; }
  .shot-card figcaption { padding: 8px 9px 10px; gap: 5px; }
  .shot-card figcaption span { font-size: 11.5px; }
  .shot-card figcaption small { font-size: 9px; }
  .review-card { grid-template-columns: 1fr; gap: 8px; padding: 14px 15px; }
  .review-avatar { width: 38px; height: 38px; font-size: 13px; }
  .review-meta { justify-content: flex-start; gap: 10px; }
  .download-inner { padding: 30px 16px 26px; }
  .download .button-large { width: 100%; }
}
@media (max-width: 380px) {
  .brand { font-size: 16px; gap: 7px; }
  .brand img { width: 30px; height: 30px; }
  .brand-tag { display: none; }
  .nav-actions { gap: 7px; }
  .nav-download { min-height: 34px; padding: 0 9px; 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; }
  .feature-card { flex-basis: 220px; }
  .chain-list b { font-size: 14px; }
}