:root {
  --ivory: #faf8f3;
  --paper: #fffdfa;
  --navy: #102846;
  --navy-2: #1b3b60;
  --muted: #617087;
  --line: #dfe5ec;
  --orange: #ff7a18;
  --orange-dark: #d95806;
  --green: #1a9c6b;
  --shadow: 0 24px 70px rgba(16, 40, 70, .12);
  --max: 1180px;
  --radius: 20px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--ivory); }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--navy);
  background: var(--ivory);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid rgba(255,122,24,.48); outline-offset: 3px; }
[id] { scroll-margin-top: 96px; }
.container { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
.skip-link { position: fixed; z-index: 100; top: 8px; left: 12px; transform: translateY(-200%); background: var(--navy); color: #fff; padding: 8px 14px; border-radius: 8px; }
.skip-link:focus { transform: translateY(0); }

.topbar { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid rgba(16,40,70,.08); background: rgba(250,248,243,.92); backdrop-filter: blur(18px); }
.nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 800; letter-spacing: -.03em; white-space: nowrap; }
.brand img { width: 38px; height: 38px; }
.nav-links { display: flex; align-items: center; gap: 30px; font-size: 15px; font-weight: 700; color: var(--navy-2); }
.nav-links a { position: relative; padding: 24px 0; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--orange-dark); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.btn { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 20px; border-radius: 12px; font-weight: 800; line-height: 1.2; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #fff; background: var(--orange); box-shadow: 0 12px 28px rgba(255,122,24,.22); }
.btn-primary:hover { background: var(--orange-dark); }
.btn-secondary { color: var(--navy); border: 1px solid var(--line); background: var(--paper); }
.btn-secondary:hover { border-color: var(--navy-2); }
.menu-toggle { display: none; min-height: 44px; min-width: 44px; border: 1px solid var(--line); border-radius: 10px; color: var(--navy); background: var(--paper); cursor: pointer; }

.hero { padding: 70px 0 76px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.03fr) minmax(420px, .97fr); align-items: center; gap: 54px; }
.eyebrow { margin: 0 0 16px; color: var(--navy-2); font-size: 14px; font-weight: 800; letter-spacing: .16em; }
h1, h2, h3 { margin: 0; line-height: 1.18; letter-spacing: -.032em; text-wrap: balance; }
h1, h2, h3, p, li { overflow-wrap: break-word; }
.heading-phrase { display: inline-block; white-space: nowrap; }
h1 { max-width: 720px; font-size: clamp(42px, 5vw, 70px); }
.hero h1 { font-size: clamp(38px, 5vw, 70px); }
.hero-title-main, .hero-title-sub { display: inline-block; white-space: nowrap; }
.hero-title-sub { font-size: .74em; letter-spacing: -.03em; }
h2 { font-size: clamp(30px, 3.2vw, 46px); }
h3 { font-size: 23px; }
.hero-copy { max-width: 650px; margin: 25px 0 28px; color: var(--muted); font-size: 19px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-proof { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 26px; color: var(--navy-2); font-weight: 800; font-size: 14px; }
.hero-proof span::before { content: "✓"; margin-right: 7px; color: var(--orange); }
.hero-note { max-width: 630px; margin: 18px 0 0; color: #7c8998; font-size: 13px; }
.desktop-break { display: block; }
.hero-visual { position: relative; min-height: 590px; display: grid; place-items: center; }
.hero-visual::before { content: ""; position: absolute; width: 520px; height: 520px; border-radius: 50%; background: #f0ede5; }
.device { position: relative; width: 282px; padding: 10px; border: 7px solid #122946; border-radius: 42px; background: #183a61; box-shadow: 0 26px 62px rgba(16,40,70,.18); transform: rotate(0deg); }
.device::before { content: ""; position: absolute; left: 50%; top: 6px; width: 88px; height: 20px; transform: translateX(-50%); border-radius: 0 0 16px 16px; background: #10233c; z-index: 2; }
.screen { min-height: 548px; border-radius: 30px; overflow: hidden; background: #fdfcf9; }
.screen-real-app { height: 548px; background: #050505; }
.screen-real-app img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: top center; }
.screen-top { display: flex; align-items: center; justify-content: space-between; padding: 30px 17px 15px; font-weight: 800; }
.screen-brand { display: flex; align-items: center; gap: 7px; }
.screen-brand img { width: 28px; height: 28px; }
.status { color: var(--green); font-size: 11px; }
.channel { margin: 0 14px; padding: 14px; border-radius: 14px; background: #eef2f6; }
.channel strong { display: block; font-size: 16px; }
.channel span { color: var(--muted); font-size: 11px; }
.members { display: flex; gap: 6px; padding: 18px 16px 8px; }
.member { width: 39px; height: 39px; display: grid; place-items: center; border-radius: 50%; color: var(--navy); background: #e6edf3; font-size: 11px; font-weight: 800; }
.wave { display: flex; align-items: center; justify-content: center; gap: 4px; height: 57px; }
.wave i { width: 4px; border-radius: 5px; background: var(--orange); }
.wave i:nth-child(1), .wave i:nth-child(7) { height: 12px; }.wave i:nth-child(2), .wave i:nth-child(6) { height: 24px; }.wave i:nth-child(3), .wave i:nth-child(5) { height: 37px; }.wave i:nth-child(4) { height: 49px; }
.ptt { width: 132px; height: 132px; display: grid; place-items: center; margin: 3px auto 14px; border: 5px solid #ff9b4c; border-radius: 50%; color: #fff; background: var(--orange); box-shadow: 0 12px 24px rgba(255,122,24,.25); text-align: center; }
.ptt strong { display: block; font-size: 32px; line-height: 1; }.ptt span { display: block; margin-top: 7px; font-size: 11px; }
.screen-hint { text-align: center; color: var(--navy); font-size: 12px; font-weight: 800; }
.screen-nav { display: flex; justify-content: space-around; margin-top: 20px; padding: 14px 6px 16px; border-top: 1px solid #e5e9ed; color: #7c8998; font-size: 11px; }.screen-nav b { color: var(--orange); }
.visual-points { position: absolute; top: 142px; right: -20px; display: grid; gap: 16px; }
.visual-point { display: flex; align-items: center; gap: 12px; min-width: 190px; padding: 13px 15px; border: 1px solid rgba(16,40,70,.1); border-radius: 16px; background: rgba(255,253,250,.92); box-shadow: 0 16px 34px rgba(16,40,70,.09); }
.visual-point .icon { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; color: var(--orange-dark); background: #fff0e6; font-weight: 900; }
.visual-point strong { display: block; font-size: 14px; }.visual-point span { display: block; color: var(--muted); font-size: 12px; }

.section { padding: 92px 0; }.section-soft { background: #f3f1eb; }.section-head { max-width: 720px; margin-bottom: 36px; }.section-head p { margin: 18px 0 0; color: var(--muted); font-size: 17px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,253,250,.78); }
.step { position: relative; min-height: 155px; padding: 8px 18px 12px 64px; }.step:not(:last-child)::after { content: "→"; position: absolute; right: -7px; top: 28px; color: #98a5b3; font-size: 27px; }.step-no { position: absolute; left: 0; top: 6px; width: 40px; height: 40px; display: grid; place-items: center; border-radius: 50%; color: var(--orange-dark); background: #ffead9; font-weight: 900; }.step p { margin: 9px 0 0; color: var(--muted); font-size: 14px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }.card { padding: 27px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }.card p { margin: 12px 0 0; color: var(--muted); }.card-kicker { margin-bottom: 12px; color: var(--orange-dark); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }.feature { min-height: 195px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }.feature-icon { width: 42px; height: 42px; display: grid; place-items: center; margin-bottom: 18px; border-radius: 12px; color: var(--orange-dark); background: #fff0e6; font-size: 20px; font-weight: 900; }.feature p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }.scene-card { display: flex; min-height: 180px; flex-direction: column; justify-content: space-between; overflow: hidden; padding: 0 24px 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); transition: transform .2s ease, box-shadow .2s ease; }.scene-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }.scene-card h3 { font-size: 21px; line-height: 1.35; font-weight: 800; }.scene-card p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }.scene-card span { margin-top: 18px; color: var(--orange-dark); font-size: 14px; font-weight: 800; }.scene-card-media { height: 126px; margin: 0 -24px 22px; overflow: hidden; }.scene-card-media img { display: block; width: 100%; height: 100%; object-fit: cover; }.scene-page-media { width: min(720px, 100%); height: 220px; margin: 28px 0 0; overflow: hidden; border-radius: 18px; border: 1px solid var(--line); background: #e7e3da; }.scene-page-media img { display: block; width: 100%; height: 100%; object-fit: cover; }
.faq-list { display: grid; gap: 10px; max-width: 850px; }.faq-list details { padding: 18px 20px; border: 1px solid var(--line); border-radius: 14px; background: var(--paper); }.faq-list summary { cursor: pointer; font-weight: 800; }.faq-list details p { margin: 12px 0 0; color: var(--muted); }
.cta-band { padding: 64px 0; color: #fff; background: var(--navy); }.cta-band .section-head p { color: #bdc9d7; }.cta-band .btn-secondary { color: #fff; border-color: rgba(255,255,255,.28); background: transparent; }
.breadcrumb { padding: 24px 0 0; color: var(--muted); font-size: 13px; }.breadcrumb a { color: var(--navy-2); font-weight: 700; }
.page-hero { padding: 60px 0 54px; border-bottom: 1px solid var(--line); }.page-hero h1 { max-width: 860px; }.page-hero p { max-width: 780px; margin: 21px 0 0; color: var(--muted); font-size: 19px; }.answer-box { margin-top: 30px; padding: 20px 22px; border-left: 4px solid var(--orange); border-radius: 0 14px 14px 0; color: var(--navy-2); background: #fff0e6; font-weight: 700; }
.page-hero h1 { font-size: clamp(36px, 4.5vw, 60px); }
.headline-clause { display: block; white-space: nowrap; }
.headline-clause-secondary { font-size: clamp(24px, 3.6vw, 48px); letter-spacing: -.035em; }
.prose { max-width: 860px; }.prose h2 { margin-top: 48px; font-size: 31px; }.prose > h2:first-child { margin-top: 0; }.prose h3 { margin-top: 30px; font-size: 21px; }.prose p { color: var(--muted); font-size: 16px; }.prose ul, .prose ol { color: var(--muted); padding-left: 24px; }.prose li { margin: 7px 0; }.two-col { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr); gap: 48px; align-items: start; }
.mini-panel { padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }.mini-panel h3 { font-size: 20px; }.mini-panel ul { margin: 16px 0 0; padding-left: 20px; color: var(--muted); }.mini-panel li { margin: 8px 0; }
.support-form { max-width: 720px; padding: clamp(24px, 4vw, 40px); border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); box-shadow: var(--shadow); }.form-heading { margin-bottom: 26px; }.form-heading h2 { font-size: 31px; }.form-heading p { margin: 12px 0 0; color: var(--muted); font-size: 14px; }.form-heading span, .form-row label span { color: var(--orange-dark); }.form-row { display: grid; gap: 7px; margin-top: 18px; }.form-row label { font-weight: 800; }.form-row input, .form-row select, .form-row textarea { width: 100%; border: 1px solid #cfd8e2; border-radius: 10px; padding: 12px 13px; color: var(--navy); background: #fff; font: inherit; line-height: 1.5; }.form-row textarea { resize: vertical; }.form-row input:focus, .form-row select:focus, .form-row textarea:focus { outline: 3px solid rgba(255,122,24,.2); border-color: var(--orange); }.form-row small { color: var(--muted); font-size: 12px; }.form-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 26px; }.form-actions .btn:disabled { cursor: wait; opacity: .65; transform: none; }.form-status { min-height: 24px; margin: 0; color: var(--muted); font-size: 14px; }.form-status.is-success { color: var(--green); }.form-status.is-error { color: #b8442c; }.support-aside h3:not(:first-child) { margin-top: 28px; }.support-aside ol { margin: 16px 0 0; padding-left: 21px; color: var(--muted); }.support-aside ol li { margin: 8px 0; }
.download-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }.download-card { display: flex; flex-direction: column; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }.download-card p { color: var(--muted); }.download-card .btn { align-self: flex-start; margin-top: auto; }
.site-footer { padding: 42px 0 28px; border-top: 1px solid var(--line); background: #f3f1eb; }.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 26px; }.footer-brand { font-size: 19px; font-weight: 800; }.footer-brand img { width: 34px; margin-bottom: 12px; }.footer-col strong { display: block; margin-bottom: 10px; }.footer-col a { display: block; margin: 7px 0; color: var(--muted); font-size: 14px; }.footer-note { margin-top: 34px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.legal-wrap { width: min(920px, calc(100% - 48px)); margin: 0 auto; padding: 56px 0 82px; }.legal-meta { margin-top: 12px; color: var(--muted); font-size: 13px; }.legal-card { margin-top: 28px; padding: clamp(24px, 5vw, 48px); border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); box-shadow: var(--shadow); }.legal-card h2 { margin: 34px 0 10px; font-size: 24px; }.legal-card h2:first-child { margin-top: 0; }.legal-card p, .legal-card li { color: var(--muted); }.legal-card ul { padding-left: 23px; }.legal-card li { margin: 8px 0; }.legal-card strong { color: var(--navy); }.legal-notice { margin: 20px 0; padding: 16px 18px; border-left: 4px solid var(--orange); border-radius: 0 12px 12px 0; color: var(--navy-2); background: #fff0e6; }
.scene-card-media img { filter: saturate(.92) contrast(1.03); transition: transform .28s ease, filter .28s ease; }
.scene-card:hover .scene-card-media img { transform: scale(1.04); filter: saturate(1) contrast(1.04); }
.scene-page-media img { filter: saturate(.94) contrast(1.03); }

@media (max-width: 960px) {
  .nav-links { gap: 18px; }
  .hero-grid { grid-template-columns: 1fr; }.hero-visual { min-height: 540px; }.visual-points { right: 4%; }.feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .desktop-break { display: none; }
  .hero h1 { font-size: 36px; }
  .hero-title-sub { font-size: .86em; }
  .container { width: min(var(--max), calc(100% - 32px)); }.nav { min-height: 68px; }.brand { font-size: 19px; }.brand img { width: 34px; height: 34px; }.nav-actions .btn { display: none; }.menu-toggle { display: inline-grid; place-items: center; }.nav-links { position: absolute; left: 16px; right: 16px; top: 76px; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 8px; border: 1px solid var(--line); border-radius: 16px; background: var(--paper); box-shadow: var(--shadow); }.nav-links.open { display: flex; }.nav-links a { padding: 13px 14px; border-radius: 10px; }.nav-links a:hover { background: #fff0e6; }.hero { padding: 48px 0 44px; }.hero-grid { gap: 24px; }.hero-copy { font-size: 17px; }.hero-visual { min-height: 460px; transform: scale(.9); transform-origin: top center; margin-bottom: -45px; }.visual-points { top: 110px; right: -8px; }.visual-point { min-width: 160px; padding: 10px; }.visual-point span { display: none; }.steps, .cards, .scene-grid, .download-grid, .footer-grid, .two-col { grid-template-columns: 1fr; }.step { min-height: auto; padding-bottom: 22px; }.step:not(:last-child)::after { content: "↓"; left: 17px; right: auto; top: auto; bottom: -8px; font-size: 20px; }.section { padding: 66px 0; }.section-head p, .page-hero p { font-size: 16px; }.page-hero { padding: 44px 0 40px; }.page-hero h1 { font-size: 36px; }.headline-clause-secondary { font-size: 24px; }.prose h2 { margin-top: 38px; font-size: 28px; }.cta-band { padding: 54px 0; }.legal-wrap { width: calc(100% - 32px); padding: 42px 0 64px; }.legal-card { border-radius: 18px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; } }
@media (max-width: 760px) { .visual-points { display: none; } }