:root {
    --bg: #FFF8FB;
    --surface: #FFFFFF;
    --pink-soft: #FFF0F5;
    --purple-soft: #F6F2FF;
    --gray-soft: #F8F6F7;
    --title: #33262D;
    --text: #51444B;
    --muted: #7C6C75;
    --faint: #A09199;
    --pink: #FF5F9F;
    --pink-deep: #D94A82;
    --coral: #FF92AA;
    --purple: #8973E6;
    --purple-deep: #6150AD;
    --border: rgba(255,95,159,.16);
    --shadow: 0 14px 36px rgba(70,42,57,.08);
    --shadow-strong: 0 20px 48px rgba(217,74,130,.15);
    --header-h: 118px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.75;
    overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--pink-deep); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid rgba(137,115,230,.42); outline-offset: 3px; }
button { font: inherit; }
img { display: block; max-width: 100%; height: auto; }
.shell { width: min(1240px, calc(100% - 40px)); margin: 0 auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 9999; background: var(--surface); color: var(--title); padding: 10px 14px; border-radius: 12px; box-shadow: var(--shadow); }
.skip-link:focus { top: 12px; }
.site-header { position: fixed; inset: 0 0 auto; z-index: 900; box-shadow: 0 8px 24px rgba(70,42,57,.06); }
.brand-toolbar { height: 42px; background: rgba(255,248,251,.98); border-bottom: 1px solid var(--border); }
.toolbar-inner { height: 42px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand-line { display: flex; align-items: baseline; gap: 12px; white-space: nowrap; }
.brand-line strong { color: var(--title); font-size: 15px; }
.brand-line span { color: var(--muted); font-size: 13px; }
.utility-nav { display: flex; align-items: center; gap: 8px; }
.utility-nav a { min-height: 36px; display: inline-flex; align-items: center; padding: 0 10px; color: var(--muted); font-size: 13px; border-radius: 10px; }
.utility-nav a:hover { background: var(--pink-soft); color: var(--pink-deep); }
.main-nav-wrap { height: 76px; background: rgba(255,255,255,.97); backdrop-filter: blur(12px); }
.main-nav { height: 76px; display: flex; align-items: center; gap: 16px; min-width: 0; }
.menu-trigger { flex: 0 0 auto; min-width: 72px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 4px; border: 1px solid var(--border); border-radius: 14px; background: var(--surface); color: var(--title); cursor: pointer; padding: 0 12px; }
.menu-trigger span { width: 3px; height: 3px; border-radius: 50%; background: var(--pink); }
.menu-trigger b { font-size: 14px; margin-left: 4px; }
.site-logo { flex: 0 0 auto; min-width: 122px; min-height: 44px; display: flex; align-items: center; justify-content: flex-start; }
.site-logo img { width: auto; max-width: 132px; max-height: 42px; object-fit: contain; }
.site-logo span { color: var(--title); font-size: 22px; font-weight: 800; letter-spacing: -.5px; white-space: nowrap; }
.desktop-nav { min-width: 0; display: flex; align-items: center; gap: 4px; flex: 1 1 auto; overflow: hidden; }
.desktop-nav a { min-height: 44px; display: inline-flex; align-items: center; flex: 0 0 auto; padding: 0 12px; border-radius: 12px; color: var(--text); font-size: 15px; white-space: nowrap; }
.desktop-nav a:hover, .desktop-nav a.is-current { background: var(--pink-soft); color: var(--pink-deep); }
.app-cta, .btn-primary, .btn-secondary { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; border-radius: 14px; padding: 0 20px; font-weight: 700; white-space: nowrap; transition: transform .18s ease, box-shadow .18s ease; }
.app-cta, .btn-primary { color: #fff; background: linear-gradient(135deg, #FF92AA 0%, #FF5F9F 52%, #8973E6 100%); box-shadow: 0 10px 22px rgba(217,74,130,.17); }
.app-cta:hover, .btn-primary:hover { color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-strong); }
.btn-secondary { background: var(--surface); border: 1px solid var(--border); color: var(--pink-deep); }
.btn-secondary:hover { background: var(--pink-soft); }
.site-main { padding-top: var(--header-h); min-height: 70vh; }

.hero { padding: 58px 0 46px; position: relative; overflow: hidden; }
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 999px; pointer-events: none; filter: blur(2px); opacity: .55; }
.hero::before { width: 300px; height: 300px; right: 3%; top: 12%; background: var(--pink-soft); }
.hero::after { width: 240px; height: 240px; left: 4%; bottom: -80px; background: var(--purple-soft); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(380px, .95fr); gap: 52px; align-items: center; }
.eyebrow { margin: 0 0 10px; color: var(--pink-deep); font-weight: 800; letter-spacing: .08em; font-size: 14px; }
.hero h1, .page-hero h1 { margin: 0; color: var(--title); line-height: 1.18; letter-spacing: -1.1px; }
.hero h1 { font-size: clamp(40px, 5vw, 66px); max-width: 700px; }
.hero .lead { margin: 22px 0 0; max-width: 720px; font-size: 17px; color: var(--muted); }
.hero-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 28px; }
.text-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--pink-deep); font-weight: 700; }
.text-link::after { content: "→"; margin-left: 6px; }
.hero-stage { min-height: 480px; border-radius: 32px; background: linear-gradient(145deg, var(--pink-soft), #fff 48%, var(--purple-soft)); box-shadow: var(--shadow-strong); border: 1px solid var(--border); padding: 28px; position: relative; overflow: hidden; }
.hero-stage::before { content: ""; position: absolute; width: 220px; height: 220px; border-radius: 50%; background: rgba(255,146,170,.2); right: -54px; top: -44px; pointer-events: none; }
.phone-scene { width: min(70%, 310px); height: 390px; margin: 18px auto; border: 10px solid #fff; border-radius: 42px; background: linear-gradient(180deg, #fff 0 18%, #FFF0F5 18% 52%, #F6F2FF 52% 100%); box-shadow: 0 22px 40px rgba(70,42,57,.16); position: relative; }
.phone-scene::before { content: ""; position: absolute; top: 10px; left: 50%; width: 64px; height: 8px; transform: translateX(-50%); border-radius: 10px; background: #e8dfe4; }
.phone-scene::after { content: "记录 · 兴趣 · 交流"; position: absolute; left: 20px; right: 20px; bottom: 28px; text-align: center; color: var(--muted); font-size: 13px; font-weight: 700; }
.float-note { position: absolute; width: 185px; padding: 14px 16px; background: rgba(255,255,255,.96); border: 1px solid var(--border); border-radius: 18px; box-shadow: var(--shadow); }
.float-note strong { display: block; color: var(--title); margin-bottom: 4px; font-size: 14px; }
.float-note span { color: var(--muted); font-size: 12px; line-height: 1.55; display: block; }
.float-note.one { left: 18px; top: 72px; }
.float-note.two { right: 14px; top: 190px; }
.float-note.three { left: 34px; bottom: 32px; }

.section { padding: 72px 0; }
.section.alt { background: var(--surface); }
.section.soft-pink { background: var(--pink-soft); }
.section.soft-purple { background: var(--purple-soft); }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 28px; }
.section-head .copy { max-width: 760px; }
.section-head h2 { margin: 0 0 8px; font-size: clamp(28px, 3vw, 40px); line-height: 1.25; color: var(--title); }
.section-head p { margin: 0; color: var(--muted); }
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-7 { grid-template-columns: repeat(7, minmax(0, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 22px; padding: 24px; box-shadow: var(--shadow); }
.card h3 { margin: 0 0 10px; color: var(--title); font-size: 20px; line-height: 1.35; }
.card p { margin: 0; color: var(--muted); }
.card .text-link { margin-top: 12px; }
.index-card { min-height: 184px; display: flex; flex-direction: column; justify-content: space-between; }
.index-card h3 { font-size: 18px; }
.index-card p { font-size: 14px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.tag { display: inline-flex; min-height: 32px; align-items: center; padding: 0 12px; border-radius: 999px; background: var(--pink-soft); color: var(--pink-deep); font-size: 13px; }
.timeline { position: relative; display: grid; gap: 18px; }
.timeline::before { content: ""; position: absolute; left: 25px; top: 22px; bottom: 22px; width: 2px; background: rgba(255,95,159,.18); pointer-events: none; }
.timeline-item { display: grid; grid-template-columns: 52px 1fr; gap: 18px; align-items: start; position: relative; }
.timeline-dot { width: 52px; height: 52px; border-radius: 50%; background: linear-gradient(135deg, var(--coral), var(--purple)); color: #fff; display: grid; place-items: center; font-size: 12px; font-weight: 800; z-index: 1; }
.timeline-card { background: var(--surface); border: 1px solid var(--border); border-radius: 24px; padding: 22px 24px; box-shadow: var(--shadow); }
.timeline-card h3 { margin: 0 0 8px; color: var(--title); }
.timeline-card p { margin: 0; color: var(--muted); }
.topic-card:nth-child(2n) { background: var(--purple-soft); }
.topic-card:nth-child(3n) { background: var(--pink-soft); }
.tag-wall { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 24px; }
.tag-wall span { padding: 10px 16px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); color: var(--title); font-weight: 700; }
.discussion-list { display: grid; gap: 14px; }
.discussion { background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 22px; }
.discussion h3 { margin: 0 0 8px; color: var(--title); }
.discussion p { margin: 0; color: var(--muted); }
.notice { border-radius: 24px; padding: 28px; background: linear-gradient(135deg, rgba(255,240,245,.9), rgba(246,242,255,.9)); border: 1px solid var(--border); }
.notice h2, .notice h3 { color: var(--title); margin-top: 0; }
.notice p:last-child { margin-bottom: 0; }
.list-clean { margin: 0; padding-left: 1.25em; color: var(--muted); }
.list-clean li + li { margin-top: 8px; }
.feature-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.feature-panel { border-radius: 26px; padding: 30px; border: 1px solid var(--border); box-shadow: var(--shadow); background: var(--surface); }
.feature-panel h3 { margin-top: 0; color: var(--title); font-size: 24px; }
.feature-panel:nth-child(2) { background: var(--purple-soft); }
.quote-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.quote-card { background: var(--surface); border-radius: 20px; padding: 22px; border: 1px solid var(--border); }
.quote-card p { margin: 0; color: var(--muted); }
.faq-list { display: grid; gap: 12px; }
details { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; overflow: hidden; }
summary { min-height: 54px; cursor: pointer; display: flex; align-items: center; padding: 12px 18px; color: var(--title); font-weight: 800; }
details p { margin: 0; padding: 0 18px 18px; color: var(--muted); }

.page-hero { padding: 58px 0 34px; }
.page-hero .hero-box { border-radius: 28px; padding: 42px; background: linear-gradient(145deg, #fff, var(--pink-soft) 62%, var(--purple-soft)); border: 1px solid var(--border); box-shadow: var(--shadow); }
.page-hero h1 { font-size: clamp(36px, 4.8vw, 58px); }
.page-hero p { max-width: 840px; margin: 16px 0 0; color: var(--muted); font-size: 17px; }
.page-body { padding: 24px 0 74px; }
.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 28px; align-items: start; }
.content-main { min-width: 0; }
.content-main > section + section { margin-top: 46px; }
.content-main h2 { margin: 0 0 16px; color: var(--title); font-size: 30px; line-height: 1.3; }
.content-main h3 { color: var(--title); }
.prose { font-size: 16px; }
.prose p { color: var(--text); margin: 0 0 16px; }
.prose p:last-child { margin-bottom: 0; }
.side-nav { position: sticky; top: calc(var(--header-h) + 22px); background: var(--surface); border: 1px solid var(--border); border-radius: 22px; padding: 20px; box-shadow: var(--shadow); }
.side-nav h2 { margin: 0 0 12px; color: var(--title); font-size: 18px; }
.side-nav a { display: flex; align-items: center; min-height: 42px; padding: 4px 10px; border-radius: 10px; color: var(--muted); }
.side-nav a:hover { background: var(--pink-soft); color: var(--pink-deep); }
.steps { counter-reset: step; display: grid; gap: 14px; }
.step { counter-increment: step; position: relative; padding: 22px 22px 22px 70px; border-radius: 20px; background: var(--surface); border: 1px solid var(--border); }
.step::before { content: counter(step); position: absolute; left: 20px; top: 20px; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, var(--coral), var(--purple)); font-weight: 800; }
.step h3 { margin: 0 0 4px; font-size: 18px; }
.step p { margin: 0; color: var(--muted); }
.service-note { margin-top: 42px; padding: 26px; border-radius: 22px; background: var(--gray-soft); border: 1px solid rgba(124,108,117,.12); }
.related { display: flex; flex-wrap: wrap; gap: 10px; }
.related a { min-height: 42px; display: inline-flex; align-items: center; padding: 0 14px; border-radius: 12px; background: var(--surface); border: 1px solid var(--border); color: var(--pink-deep); font-weight: 700; }

.site-footer { background: #30242B; color: #FFEAF2; padding: 58px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(4, minmax(120px, 1fr)); gap: 28px; }
.footer-brand p { color: rgba(255,234,242,.72); max-width: 300px; }
.footer-logo { min-height: 44px; display: inline-flex; align-items: center; }
.footer-logo img { max-height: 42px; max-width: 132px; object-fit: contain; }
.footer-logo strong { font-size: 24px; }
.site-footer nav h2 { margin: 0 0 12px; font-size: 15px; color: #fff; }
.site-footer nav a { min-height: 36px; display: flex; align-items: center; color: rgba(255,234,242,.74); font-size: 14px; }
.site-footer nav a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 32px; padding-top: 22px; display: flex; justify-content: space-between; gap: 24px; color: rgba(255,234,242,.66); font-size: 13px; }
.footer-bottom p { margin: 0; }

.quick-rail { position: fixed; right: 18px; top: 50%; transform: translateY(-50%); z-index: 650; display: flex; flex-direction: column; gap: 8px; padding: 10px; border-radius: 18px; background: rgba(255,255,255,.94); border: 1px solid var(--border); box-shadow: var(--shadow); }
.quick-rail a { min-height: 42px; min-width: 86px; display: flex; align-items: center; justify-content: center; padding: 0 10px; border-radius: 10px; color: var(--muted); font-size: 13px; }
.quick-rail a:hover, .quick-rail a.is-current { background: var(--pink-soft); color: var(--pink-deep); }
.channel-menu { position: fixed; inset: 0 auto 0 0; width: min(470px, 88vw); z-index: 1200; background: var(--surface); box-shadow: 24px 0 60px rgba(51,38,45,.2); transform: translateX(-104%); visibility: hidden; transition: transform .24s ease, visibility .24s ease; display: flex; flex-direction: column; }
.channel-menu.is-open { transform: translateX(0); visibility: visible; }
.menu-overlay { position: fixed; inset: 0; z-index: 1100; background: rgba(51,38,45,.34); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .2s ease, visibility .2s ease; }
.menu-overlay.is-open { opacity: 1; visibility: visible; pointer-events: auto; }
.channel-head { min-height: 76px; padding: 12px 18px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--border); }
.menu-brand { min-height: 44px; display: flex; align-items: center; gap: 10px; color: var(--title); }
.menu-brand img { width: auto; max-width: 100px; max-height: 38px; object-fit: contain; }
.menu-brand strong { font-size: 20px; }
.menu-close { min-height: 44px; min-width: 58px; border: 1px solid var(--border); background: var(--pink-soft); color: var(--pink-deep); border-radius: 12px; cursor: pointer; }
.channel-scroll { overflow-y: auto; padding: 14px 18px 30px; overscroll-behavior: contain; }
.menu-group { padding: 12px 0 18px; }
.menu-group h2 { margin: 0 0 8px; color: var(--faint); font-size: 12px; letter-spacing: .12em; }
.menu-links { display: grid; gap: 5px; }
.menu-links a, .mobile-home-link { min-height: 62px; padding: 10px 12px; border-radius: 14px; display: flex; flex-direction: column; justify-content: center; }
.menu-links a:hover, .mobile-home-link:hover { background: var(--pink-soft); }
.menu-links strong, .mobile-home-link { color: var(--title); font-size: 15px; }
.menu-links span, .mobile-home-link span { display: block; color: var(--muted); font-size: 12px; line-height: 1.5; margin-top: 2px; }
.mobile-home-link { display: none; }
.mobile-bottom-nav { display: none; }

@media (max-width: 1500px) { .quick-rail { display: none; } }
@media (max-width: 1040px) {
    .desktop-nav a { padding: 0 8px; font-size: 14px; }
    .hero-grid { grid-template-columns: 1fr 400px; gap: 28px; }
    .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .grid-7 { grid-template-columns: repeat(4, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: 1.2fr repeat(2, 1fr); }
    .content-grid { grid-template-columns: 1fr; }
    .side-nav { position: static; }
}
@media (max-width: 820px) {
    :root { --header-h: 72px; }
    .shell { width: min(100% - 32px, 1240px); }
    .brand-toolbar, .desktop-nav { display: none; }
    .main-nav-wrap, .main-nav { height: 72px; }
    .main-nav { justify-content: space-between; gap: 10px; }
    .menu-trigger { min-width: 52px; padding: 0 10px; }
    .menu-trigger b { display: none; }
    .site-logo { min-width: 0; flex: 1 1 auto; justify-content: center; }
    .site-logo span { font-size: 20px; }
    .site-logo img { max-width: 112px; max-height: 38px; }
    .app-cta { min-width: 70px; padding: 0 12px; font-size: 13px; }
    .hero { padding: 34px 0 36px; }
    .hero-grid { grid-template-columns: 1fr; gap: 30px; }
    .hero-stage { min-height: 430px; }
    .hero h1 { font-size: clamp(38px, 11vw, 54px); }
    .hero .lead { font-size: 16px; }
    .float-note { position: static; width: auto; margin-top: 10px; }
    .hero-stage { display: flex; flex-direction: column; }
    .phone-scene { order: 0; margin: 4px auto 14px; width: min(74%, 280px); height: 320px; }
    .float-note.one, .float-note.two, .float-note.three { order: 1; }
    .grid-3, .quote-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .feature-pair { grid-template-columns: 1fr; }
    .section { padding: 56px 0; }
    .section-head { align-items: start; flex-direction: column; }
    .page-hero { padding: 34px 0 20px; }
    .page-hero .hero-box { padding: 30px 24px; }
    .page-body { padding-bottom: 96px; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-brand { grid-column: 1 / -1; }
    .footer-bottom { flex-direction: column; }
    .mobile-bottom-nav { position: fixed; left: 10px; right: 10px; bottom: max(10px, env(safe-area-inset-bottom)); z-index: 800; min-height: 58px; display: grid; grid-template-columns: repeat(5, 1fr); background: rgba(255,255,255,.96); border: 1px solid var(--border); box-shadow: 0 16px 40px rgba(70,42,57,.16); border-radius: 20px; padding: 5px; }
    .mobile-bottom-nav a { min-height: 48px; display: flex; align-items: center; justify-content: center; border-radius: 14px; color: var(--muted); font-size: 13px; font-weight: 700; }
    .mobile-bottom-nav a.is-current { background: var(--pink-soft); color: var(--pink-deep); }
    .site-footer { padding-bottom: 102px; }
    .mobile-home-link { display: flex; }
}
@media (max-width: 620px) {
    .shell { width: calc(100% - 32px); }
    .grid-2, .grid-3, .grid-4, .grid-7, .quote-grid { grid-template-columns: 1fr; }
    .hero-actions { align-items: stretch; }
    .hero-actions .btn-primary, .hero-actions .btn-secondary { flex: 1 1 100%; }
    .timeline-item { grid-template-columns: 44px 1fr; gap: 12px; }
    .timeline-dot { width: 44px; height: 44px; font-size: 11px; }
    .timeline::before { left: 21px; }
    .timeline-card { padding: 20px; }
    .feature-panel { padding: 24px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-brand { grid-column: auto; }
    .page-hero h1 { font-size: 38px; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .001ms !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; }
}
.utility-nav a.is-current { background: var(--pink-soft); color: var(--pink-deep); font-weight: 700; }
.menu-links a.is-current, .mobile-home-link.is-current { background: var(--pink-soft); color: var(--pink-deep); }