@charset "UTF-8";

:root {
  --bg: #F5F8FD;
  --bg-2: #EDF3FB;
  --panel: #FFFFFF;
  --line: #DCE6F5;
  --ink: #142033;
  --muted: #5C6C86;
  --blue: #2F80ED;
  --orange: #FF8A3D;
  --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(--blue); 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(--blue);
  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(255, 255, 255, .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: 18px;
}
.brand { display: inline-flex; align-items: center; flex: none; gap: 10px; font-size: 19px; font-weight: 900; letter-spacing: -.3px; white-space: nowrap; }
.brand img { width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 50%; object-fit: contain; background: #fff; }
.brand-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: var(--orange);
  color: #fff;
  font-size: 11px;
  font-style: normal;
  font-weight: 900;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(11px, 1.8vw, 24px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; border-bottom: 2px solid transparent; color: #526480; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--blue); color: var(--ink); }
.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 17px;
  border: 1px solid var(--blue);
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
  font-size: 12.5px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-download:hover { background: #fff; color: var(--blue); }
.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: 50%; background: #fff; 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: mirrored split, center line, world numbers */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, #E7F0FE 0%, #EDF4FE 50%, #FFF0E5 50%, #FFF4EC 100%);
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image: radial-gradient(rgba(47, 128, 237, .16) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(180deg, #000, transparent 82%);
  pointer-events: none;
}
.hero-split {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 1px minmax(0, 1fr);
  align-items: center;
  padding: 58px 0 34px;
}
.hero-copy { min-width: 0; padding-right: clamp(22px, 3vw, 46px); }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  color: #4E6584;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 1.6px;
}
.hero-kicker b {
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--blue);
  color: #fff;
  font-size: 9.5px;
  font-weight: 900;
  letter-spacing: 1.2px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(36px, 4.7vw, 58px);
  font-weight: 900;
  letter-spacing: -1.6px;
  line-height: 1.06;
}
.hero-subtitle {
  margin: 16px 0 0;
  color: var(--blue);
  font-size: clamp(17px, 1.9vw, 22px);
  font-weight: 800;
  line-height: 1.4;
}
.hero-lead { max-width: 480px; 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: 13.5px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.button-primary { background: var(--blue); color: #fff; box-shadow: 0 14px 28px rgba(47, 128, 237, .26); }
.button-primary:hover { background: #1E6EDC; transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 34px; font-size: 15px; }
.text-link { color: #3E5677; border-bottom: 1px dashed #B4C7E2; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--orange); }

.hero-line {
  position: relative;
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, transparent, #B9CBE3 14%, #B9CBE3 86%, transparent);
}
.hero-line::before {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 11px;
  height: 11px;
  border: 1px solid #fff;
  background: var(--orange);
  content: "";
  transform: translate(-50%, -50%) rotate(45deg);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, .18);
}
.world-panel { min-width: 0; padding-left: clamp(22px, 3vw, 46px); text-align: right; }
.world-head { display: flex; flex-direction: row-reverse; align-items: baseline; justify-content: space-between; gap: 12px; padding-bottom: 11px; margin-bottom: 12px; border-bottom: 1px dashed #E7C9B4; }
.world-head b { padding: 2px 9px; border-radius: 999px; background: rgba(255, 138, 61, .16); color: #C9611F; font-size: 12px; font-weight: 900; }
.world-head span { color: #A8734F; font-family: var(--mono); font-size: 10.5px; }
.world-list { padding: 0; margin: 0; list-style: none; }
.world-list li { display: flex; align-items: baseline; gap: 12px; padding: 9px 0; border-bottom: 1px solid #F2DCCB; font-size: 12.5px; line-height: 1.65; }
.world-list li:last-child { border-bottom: 0; }
.world-list span { flex: 1; color: #6B5544; }
.world-list span b { display: block; color: var(--ink); font-size: 14px; }
.world-list i { flex: none; color: var(--orange); font-family: var(--mono); font-size: 10.5px; font-style: normal; }
.world-note { margin: 12px 0 0; color: #A8734F; font-size: 12px; }

.world-strip {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
  padding: 0 0 38px;
  margin: 0;
  list-style: none;
}
.world-strip li { padding: 10px 8px; border: 1px solid #CFDEEE; border-radius: 8px; background: rgba(255, 255, 255, .7); text-align: center; }
.world-strip b { display: block; color: var(--blue); font-family: var(--mono); font-size: 11px; letter-spacing: .6px; }
.world-strip span { display: block; margin-top: 2px; color: #566A85; font-size: 12px; font-weight: 700; }
.world-strip .is-now { border-color: transparent; background: var(--blue); }
.world-strip .is-now b, .world-strip .is-now span { color: #fff; }

/* features: ledger rows */
.features { padding: 74px 0 80px; border-bottom: 1px solid var(--line); background: #fff; }
.section-heading { margin-bottom: 30px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(24px, 2.8vw, 34px); font-weight: 900; letter-spacing: -.8px; line-height: 1.3; }
.section-heading > p:last-child { max-width: 640px; margin: 11px 0 0; color: var(--muted); font-size: 14px; }
.feature-ledger { padding: 0; margin: 0; list-style: none; border-top: 1px solid var(--line); }
.feature-ledger li {
  display: grid;
  grid-template-columns: 58px minmax(150px, 220px) minmax(0, 1fr);
  align-items: baseline;
  gap: 18px;
  padding: 20px 8px 18px;
  border-bottom: 1px solid var(--line);
}
.ledger-no { color: var(--orange); font-family: var(--mono); font-size: 12px; font-weight: 700; letter-spacing: 1.2px; }
.feature-ledger h3 { margin: 0; font-size: 18px; font-weight: 900; }
.feature-ledger p { margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.8; }

/* shots: four across */
.shots { padding: 74px 0 82px; }
.shot-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; align-items: start; }
.shot-card { margin: 0; padding: 10px; border: 1px solid var(--line); border-radius: 12px; background: #fff; box-shadow: 0 12px 24px rgba(20, 32, 51, .05); }
.shot-card img { width: 100%; height: auto; aspect-ratio: 9 / 16; object-fit: cover; object-position: center 20%; border-radius: 8px; }
.shot-card figcaption { display: flex; align-items: baseline; flex-wrap: wrap; gap: 6px; padding: 10px 2px 2px; font-size: 13.5px; font-weight: 900; }
.shot-card figcaption b { color: var(--blue); font-family: var(--mono); font-size: 10.5px; letter-spacing: .8px; }
.shot-card figcaption small { flex-basis: 100%; color: var(--muted); font-size: 11px; font-weight: 500; line-height: 1.6; }

/* faq */
.faq { padding: 72px 0 78px; border-top: 1px solid var(--line); background: var(--bg-2); }
.faq-layout { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(24px, 4vw, 52px); }
.faq-heading { position: sticky; top: calc(var(--header-height) + 26px); align-self: start; }
.faq-list { border-top: 1px solid #CFDEEE; }
.faq-list details { border-bottom: 1px solid #CFDEEE; }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 17px 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: 24px; height: 24px; border-radius: 50%; background: #fff; box-shadow: inset 0 0 0 1px #CFDEEE; }
.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);
  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 32px 18px 0; margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.85; }

/* reviews: two columns staggered */
.reviews { padding: 74px 0 80px; }
.review-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 0; margin: 0; list-style: none; }
.review-card { padding: 18px 20px; border: 1px solid var(--line); border-radius: 12px; background: #fff; box-shadow: 0 10px 20px rgba(20, 32, 51, .04); }
.review-card:nth-child(even) { transform: translateY(18px); }
.review-meta { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 6px; padding-bottom: 8px; margin-bottom: 8px; border-bottom: 1px solid var(--line); }
.review-meta b { color: var(--blue); font-size: 13px; font-weight: 900; }
.review-meta time { color: #8496AF; font-family: var(--mono); font-size: 10px; }
.review-card p { margin: 0; color: #47607E; font-size: 13px; line-height: 1.8; }

/* steps: three columns with connector */
.steps { padding: 70px 0 76px; border-top: 1px solid var(--line); background: #fff; }
.step-row { position: relative; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; padding: 0; margin: 0; list-style: none; }
.step-row::before { position: absolute; top: 31px; right: 12%; left: 12%; height: 1px; content: ""; background: repeating-linear-gradient(90deg, #C7D8EE 0 8px, transparent 8px 16px); }
.step-row li { position: relative; padding: 0 4px; }
.step-row span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 14px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  box-shadow: 0 0 0 6px #fff;
}
.step-row li:nth-child(2) span { background: #5B9AF0; }
.step-row li:nth-child(3) span { background: var(--orange); }
.step-row h3 { margin: 0 0 6px; font-size: 17px; font-weight: 900; }
.step-row p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* download: centered */
.download { padding: 30px 0 36px; }
.download-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 50px clamp(24px, 5vw, 60px) 44px;
  border-radius: 20px;
  background:
    radial-gradient(420px 240px at 12% 0%, rgba(255, 138, 61, .45), transparent 66%),
    linear-gradient(132deg, #2F80ED, #1B5FC4 76%);
  color: #fff;
  text-align: center;
}
.download .eyebrow { color: #BFD8FF; }
.download h2 { max-width: 640px; color: #fff; }
.download-inner > p { max-width: 520px; margin: 12px 0 22px; color: #D6E5FF; font-size: 14px; }
.download .button-primary { background: var(--orange); color: #2A1405; box-shadow: 0 14px 26px rgba(120, 50, 8, .3); }
.download .button-primary:hover { background: #FF9E5C; }
.download-notes { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 24px; padding: 18px 0 0; margin: 24px 0 0; border-top: 1px solid rgba(255, 255, 255, .24); list-style: none; }
.download-notes li { color: #C6DBFF; font-family: var(--mono); font-size: 11px; }
.download-notes li::before { margin-right: 8px; content: "◆"; }

/* footer */
.site-footer { padding: 42px 0 50px; 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: 17px; 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: #4F6683; font-size: 12px; }
.footer-nav a:hover { color: var(--blue); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 22px; 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: #8496AF; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1024px) {
  .hero h1 { font-size: clamp(32px, 4.4vw, 46px); }
  .feature-ledger li { grid-template-columns: 48px minmax(120px, 180px) minmax(0, 1fr); gap: 14px; }
}
@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: #fff;
    box-shadow: 0 16px 26px rgba(20, 32, 51, .14);
  }
  .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 { background: linear-gradient(180deg, #E7F0FE 0%, #EDF4FE 52%, #FFF0E5 52%, #FFF4EC 100%); }
  .hero-split { grid-template-columns: 1fr; padding: 44px 0 26px; row-gap: 26px; }
  .hero-copy { padding-right: 0; }
  .hero-line { width: 100%; height: 1px; background: linear-gradient(90deg, transparent, #C9A98F 16%, #C9A98F 84%, transparent); }
  .hero-line::before { display: none; }
  .world-panel { padding-left: 0; }
  .world-strip { grid-template-columns: repeat(5, minmax(78px, 1fr)); overflow-x: auto; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-heading { position: static; }
  .feature-ledger li { grid-template-columns: 40px minmax(0, 1fr); gap: 6px 12px; }
  .feature-ledger p { grid-column: 2; }
  .shot-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step-row { grid-template-columns: 1fr; gap: 24px; }
  .step-row::before { top: 20px; bottom: 20px; left: 21px; right: auto; width: 1px; height: auto; background: repeating-linear-gradient(180deg, #C7D8EE 0 8px, transparent 8px 16px); }
  .step-row li { display: grid; grid-template-columns: 44px minmax(0, 1fr); column-gap: 16px; }
  .step-row span { grid-row: 1 / span 2; margin-bottom: 0; }
  .step-row h3 { align-self: end; }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .brand { font-size: 16px; gap: 8px; }
  .brand img { width: 34px; height: 34px; }
  .hero h1 { font-size: clamp(27px, 8.4vw, 34px); letter-spacing: -.8px; }
  .hero-lead { font-size: 13.5px; }
  .world-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); overflow: visible; }
  .review-list { grid-template-columns: 1fr; }
  .review-card:nth-child(even) { transform: none; }
  .shot-row { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .download-notes li { font-size: 10.5px; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand-tag { display: none; }
  .nav-actions { gap: 8px; }
  .nav-download { min-height: 34px; padding: 0 10px; font-size: 10.5px; gap: 5px; }
  .nav-download svg { width: 14px; height: 14px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero h1 { font-size: 25px; }
  .hero-subtitle { font-size: 15px; }
  .button { width: 100%; }
  .world-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}