:root {
    --bg: #E8F4F0;
    --deep-bg: #C8E4DC;
    --content: #F4FAF8;
    --soft: #DCEEE8;
    --title: #16382E;
    --text: #245044;
    --muted: #4A7468;
    --assist: #6A9488;
    --green: #2A8A72;
    --green2: #3AA88A;
    --gold: #C4A050;
    --border: rgba(22,56,46,.12);
    --strong-border: rgba(42,138,114,.48);
    --shadow: 0 12px 28px rgba(22,56,46,.08);
    --radius: 12px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif; font-size: 15px; line-height: 1.7; overflow-x: hidden; }
body.locked { overflow: hidden; }
a { color: inherit; text-decoration: none; }
a, button, input { -webkit-tap-highlight-color: transparent; }
button, input { font: inherit; }
button { color: inherit; }
img { display: block; max-width: 100%; }
.site-head { position: fixed; inset: 0 0 auto 0; z-index: 80; }
.top-strip { height: 20px; background: var(--green); color: var(--content); font-size: 12px; }
.top-strip__inner, .brand-bar__inner, .dot-nav__inner, .footer-inner, .content-wrap { width: min(960px, calc(100% - 32px)); margin: 0 auto; }
.top-strip__inner { height: 20px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.top-brand { white-space: nowrap; }
.text-button { min-width: 44px; height: 20px; padding: 0 6px; border: 0; background: transparent; color: var(--content); font-size: 12px; cursor: pointer; }
.brand-bar { height: 54px; background: var(--content); border-bottom: 1px solid var(--strong-border); }
.brand-bar__inner { height: 54px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand-link { min-width: 88px; min-height: 44px; display: inline-flex; align-items: center; }
.brand-logo, .drawer-logo, .footer-logo { height: 24px; width: auto; object-fit: contain; object-position: center; }
.brand-text { font-size: 16px; font-weight: 800; color: var(--title); }
.brand-actions { display: flex; align-items: center; gap: 8px; }
.app-link, .menu-button { height: 44px; min-width: 76px; padding: 0 14px; display: inline-flex; align-items: center; justify-content: center; border-radius: 10px; font-size: 14px; }
.app-link { background: linear-gradient(135deg,#2A8A72 0%,#3AA88A 100%); color: var(--content); }
.menu-button { border: 1px solid var(--green); background: var(--content); color: var(--title); cursor: pointer; }
.dot-nav { height: 48px; background: var(--content); border-bottom: 1px solid var(--border); }
.dot-nav__inner { height: 48px; display: flex; align-items: flex-end; justify-content: center; gap: clamp(24px, 7vw, 64px); padding-bottom: 5px; }
.dot-item { min-width: 58px; height: 43px; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; gap: 4px; font-size: 13px; color: var(--muted); position: relative; }
.dot-item:nth-child(3) { transform: translateY(-4px); }
.dot-item__dot { width: 10px; height: 10px; border-radius: 50%; background: var(--green2); box-shadow: 0 0 0 5px rgba(58,168,138,.09); }
.dot-item.is-current { color: var(--title); font-weight: 800; }
.dot-item.is-current .dot-item__dot { width: 14px; height: 14px; background: var(--green); }
.site-main { padding: 154px 0 52px; min-height: 68vh; }
.content-wrap { position: relative; }
.page-intro { margin: 0 0 24px; }
.eyebrow { color: var(--green); font-weight: 800; letter-spacing: .08em; font-size: 13px; margin-bottom: 6px; }
h1, h2, h3 { color: var(--title); margin-top: 0; }
h1 { font-size: 24px; line-height: 1.3; margin-bottom: 12px; }
h2 { font-size: 20px; line-height: 1.45; margin-bottom: 10px; }
h3 { font-size: 16px; line-height: 1.5; margin-bottom: 8px; }
p { margin: 0 0 12px; }
.lead { max-width: 760px; color: var(--text); }
.muted { color: var(--muted); }
.section { margin: 26px 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.section-head p { margin: 0; color: var(--muted); max-width: 620px; }
.primary-button, .secondary-button { min-height: 42px; padding: 0 16px; border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; font-size: 14px; white-space: nowrap; }
.primary-button { background: linear-gradient(135deg,#2A8A72 0%,#3AA88A 100%); color: var(--content); box-shadow: var(--shadow); }
.secondary-button { background: var(--content); color: var(--title); border: 1px solid var(--green); }
.primary-button:hover, .app-link:hover { filter: brightness(.96); }
.secondary-button:hover, .menu-button:hover { background: var(--soft); }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid rgba(196,160,80,.55); outline-offset: 2px; }
.media-slot { background: var(--content); border: 1px solid var(--border); border-radius: var(--radius); min-height: 120px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.media-slot img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
.media-slot--split { min-height: 164px; height: 164px; }
.media-slot--book { min-height: 210px; }
.media-slot--app { min-height: 260px; height: 300px; }
.media-slot--banner { min-height: 200px; height: 200px; }
.media-slot--compact { min-height: 130px; }

.mt-14 { margin-top: 14px; }
.centered-intro { text-align: center; }
.lead-centered { margin-left: auto; margin-right: auto; }
.index-dots { display: flex; gap: 16px; align-items: center; margin-bottom: 18px; }
.index-dots a { display: inline-flex; align-items: center; gap: 7px; color: var(--muted); font-size: 13px; }
.index-dots span { width: 10px; height: 10px; border-radius: 50%; background: var(--green2); }
.hero-copy { background: linear-gradient(145deg, rgba(244,250,248,.92), rgba(220,238,232,.82)); border: 1px solid var(--border); border-radius: 14px; padding: clamp(20px, 4vw, 34px); box-shadow: var(--shadow); }
.hero-copy .hero-line { font-size: 18px; color: var(--green); font-weight: 800; margin-bottom: 8px; }
.split-ribbon { display: grid; grid-template-columns: 1.08fr .92fr; gap: 0; border-radius: 14px; overflow: hidden; border: 1px solid var(--border); background: var(--content); }
.split-ribbon__copy { padding: 22px; }
.split-ribbon__media { padding: 14px; background: var(--soft); }
.vertical-records { border-left: 3px solid var(--green); padding-left: 18px; display: grid; gap: 14px; }
.vertical-record { display: grid; grid-template-columns: 1fr; gap: 12px; padding: 18px 0; border-bottom: 1px solid var(--border); }
.vertical-record.has-media { grid-template-columns: minmax(0, 1.15fr) minmax(220px, .85fr); }
.page-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.page-leaf { background: var(--content); border: 1px solid var(--border); border-radius: 14px; padding: 20px; box-shadow: var(--shadow); }
.shelf-note { background: var(--soft); border: 1px solid var(--border); border-radius: 14px; padding: 20px; }
.shelf-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.period-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.period-card { background: var(--content); border-top: 4px solid var(--green); border-radius: 12px; padding: 18px; box-shadow: var(--shadow); }
.status-list { display: grid; gap: 10px; }
.status-row { display: grid; grid-template-columns: 108px 1fr; align-items: start; gap: 16px; background: var(--content); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.status-label { display: inline-flex; min-height: 34px; align-items: center; justify-content: center; border-radius: 999px; background: var(--soft); color: var(--title); font-weight: 800; }
.app-layout { display: grid; grid-template-columns: minmax(0,1.2fr) minmax(220px,.8fr); gap: 22px; align-items: start; }
.app-visual { display: grid; gap: 12px; }
.app-icon-row { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 12px; background: var(--content); border: 1px solid var(--border); }
.app-icon-row .media-slot { width: 48px; height: 48px; min-height: 48px; flex: 0 0 48px; }
.info-list { margin: 0; padding-left: 1.25em; }
.info-list li { margin: 7px 0; }
.faq-mini { display: grid; gap: 10px; }
.faq-mini details, .faq-full details { background: var(--content); border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; }
.faq-mini summary, .faq-full summary { cursor: pointer; color: var(--title); font-weight: 800; }
.faq-mini details p, .faq-full details p { margin: 10px 0 0; }
/* inner-page distinctive layouts */
.record-page .record-item { display: grid; grid-template-columns: 86px 1fr; gap: 18px; padding: 22px 0; border-top: 1px solid var(--border); }
.record-page .record-num { font-size: 30px; color: var(--green2); font-weight: 800; line-height: 1; }
.open-strip { display: grid; grid-template-columns: 1fr 1fr; gap: 0; overflow: hidden; border: 1px solid var(--border); border-radius: 14px; margin-bottom: 16px; }
.open-strip > div { padding: 22px; background: var(--content); }
.open-strip > div:nth-child(even) { background: var(--soft); }
.clipped-pages { display: grid; gap: 14px; }
.clipped-page { display: grid; grid-template-columns: 150px 1fr; gap: 20px; background: var(--content); border: 1px solid var(--border); border-radius: 14px; padding: 18px; }
.clipped-page:nth-child(even) { grid-template-columns: 1fr 150px; }
.clipped-page:nth-child(even) .clip-key { order: 2; }
.clip-key { display: flex; align-items: center; justify-content: center; min-height: 120px; background: var(--soft); border-radius: 10px; color: var(--green); font-weight: 800; font-size: 20px; text-align: center; padding: 12px; }
.single-guide { max-width: 760px; margin: 0 auto; }
.single-guide section { padding: 18px 0; border-bottom: 1px solid var(--border); }
.memo-list { display: grid; gap: 12px; }
.memo-item { display: grid; grid-template-columns: 42px 1fr; gap: 14px; background: var(--content); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.memo-check { width: 30px; height: 30px; border: 2px solid var(--green); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--green); font-weight: 800; }
.method-steps { counter-reset: method; display: grid; gap: 14px; }
.method-step { counter-increment: method; display: grid; grid-template-columns: 58px 1fr; gap: 16px; background: var(--content); border-radius: 14px; border: 1px solid var(--border); padding: 18px; }
.method-step::before { content: counter(method, decimal-leading-zero); font-weight: 800; font-size: 26px; color: var(--green2); }
.topic-list { display: grid; gap: 12px; }
.topic-item { display: grid; grid-template-columns: 180px 1fr auto; gap: 16px; align-items: center; padding: 18px; background: var(--content); border-bottom: 3px solid var(--deep-bg); border-radius: 12px; }
.center-cards { display: grid; gap: 16px; max-width: 760px; margin: 0 auto; }
.center-card { text-align: center; background: var(--content); border: 1px solid var(--border); border-radius: 14px; padding: 24px; box-shadow: var(--shadow); }
.terms { display: grid; gap: 16px; }
.term-section { background: var(--content); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.help-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; }
.help-card { background: var(--content); border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.about-banner { margin-bottom: 20px; }
.screen-overlay { position: fixed; inset: 0; background: rgba(14,42,34,.34); opacity: 0; visibility: hidden; pointer-events: none; transition: .22s ease; z-index: 90; }
.screen-overlay.is-open { opacity: 1; visibility: visible; pointer-events: auto; }
.site-drawer { position: fixed; z-index: 110; left: 0; top: 26px; width: clamp(300px, 36vw, 420px); max-height: calc(100vh - 52px); overflow: auto; background: var(--content); border: 1px solid var(--strong-border); border-left: 0; border-radius: 0 14px 14px 0; box-shadow: 0 18px 44px rgba(22,56,46,.2); transform: translateX(-104%); visibility: hidden; pointer-events: none; transition: .24s ease; }
.site-drawer.is-open { transform: translateX(0); visibility: visible; pointer-events: auto; }
.drawer-head { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 14px 16px; background: var(--content); border-bottom: 1px solid var(--border); }
.drawer-brand { display: flex; align-items: center; gap: 10px; color: var(--title); font-weight: 800; }
.close-button { min-height: 44px; min-width: 58px; padding: 0 12px; border: 1px solid var(--green); border-radius: 10px; background: var(--content); cursor: pointer; }
.drawer-group { padding: 12px 16px 4px; }
.drawer-group h2 { font-size: 14px; margin-bottom: 6px; color: var(--green); }
.drawer-group a { min-height: 54px; display: grid; grid-template-columns: 82px 1fr; align-items: center; gap: 10px; border-top: 1px solid var(--border); padding: 7px 0; }
.drawer-group a strong { color: var(--title); }
.drawer-group a span { color: var(--muted); font-size: 13px; }
.search-panel { position: fixed; z-index: 105; top: 74px; left: 0; right: 0; visibility: hidden; pointer-events: none; transform: translateY(-16px); opacity: 0; transition: .2s ease; }
.search-panel.is-open { visibility: visible; pointer-events: auto; transform: translateY(0); opacity: 1; }
.search-card { width: min(760px, calc(100% - 32px)); margin: 0 auto; background: var(--content); border: 1px solid var(--strong-border); border-radius: 0 0 14px 14px; box-shadow: var(--shadow); padding: 18px; }
.search-head { display: flex; justify-content: space-between; gap: 16px; align-items: start; }
.search-head p { color: var(--muted); margin-top: 2px; }
.search-label { display: block; color: var(--title); margin: 10px 0 6px; font-weight: 700; }
.search-input { width: 100%; min-height: 44px; border: 1px solid var(--strong-border); border-radius: 10px; background: var(--bg); color: var(--title); padding: 0 12px; }
.search-presets { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.search-presets a { min-height: 40px; display: inline-flex; align-items: center; padding: 0 14px; border-radius: 999px; background: var(--soft); color: var(--title); }
.site-footer { background: var(--title); color: var(--bg); border-top: 1px solid rgba(244,250,248,.4); font-size: 13px; }
.footer-inner { padding: 30px 0 76px; }
.footer-brand-row { padding-bottom: 16px; border-bottom: 1px solid rgba(244,250,248,.18); }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand .brand-text { color: var(--bg); }
.footer-brand span { display: flex; align-items: baseline; gap: 8px; }
.footer-brand small { color: #C8E4DC; }
.footer-links { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; padding: 20px 0; }
.footer-links h2 { color: var(--bg); font-size: 14px; margin-bottom: 6px; }
.footer-links a { display: block; color: #DCEEE8; padding: 4px 0; }
.footer-note { color: #DCEEE8; max-width: 820px; }
.footer-copy { color: #C8E4DC; margin-top: 12px; }
.mobile-bottom { display: none; }
@media (max-width: 720px) {
    .top-strip__inner, .brand-bar__inner, .footer-inner, .content-wrap { width: calc(100% - 32px); }
    .dot-nav { display: none; }
    .site-main { padding-top: 98px; padding-bottom: 72px; }
    .brand-actions { gap: 6px; }
    .app-link, .menu-button { min-width: 68px; padding: 0 10px; }
    .split-ribbon, .app-layout, .page-pair, .shelf-grid, .period-grid, .help-grid { grid-template-columns: 1fr; }
    .vertical-record.has-media { grid-template-columns: 1fr; }
    .clipped-page, .clipped-page:nth-child(even) { grid-template-columns: 1fr; }
    .clipped-page:nth-child(even) .clip-key { order: 0; }
    .status-row { grid-template-columns: 1fr; gap: 8px; }
    .record-page .record-item { grid-template-columns: 56px 1fr; gap: 12px; }
    .open-strip { grid-template-columns: 1fr; }
    .topic-item { grid-template-columns: 1fr; }
    .site-drawer { top: 20px; width: min(86vw, 360px); max-height: calc(100vh - 40px); }
    .search-panel { inset: 20px 0 0; top: 20px; background: var(--green); color: var(--content); transform: translateY(-12px); }
    .search-card { width: 100%; min-height: calc(100vh - 20px); border: 0; border-radius: 0; background: var(--green); box-shadow: none; color: var(--content); padding: 20px 16px 70px; }
    .search-head strong, .search-label { color: var(--content); }
    .search-head p { color: #E8F4F0; }
    .search-input { background: var(--content); color: var(--title); border-color: rgba(244,250,248,.7); }
    .search-presets a { background: rgba(244,250,248,.13); color: var(--content); border: 1px solid rgba(244,250,248,.35); }
    .search-card .close-button { color: var(--content); border-color: rgba(244,250,248,.7); background: transparent; }
    .mobile-bottom { position: fixed; z-index: 70; left: 0; right: 0; bottom: 0; min-height: calc(48px + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom); background: var(--content); border-top: 1px solid var(--strong-border); display: grid; grid-template-columns: repeat(4,1fr); }
    .mobile-bottom a { min-height: 48px; display: flex; align-items: center; justify-content: center; color: var(--title); font-size: 13px; }
    .mobile-bottom a.is-current { background: var(--green); color: var(--content); font-weight: 800; }
    .footer-inner { padding-bottom: 92px; }
    .footer-links { grid-template-columns: repeat(2,1fr); }
    .index-dots { flex-wrap: wrap; gap: 10px 14px; }
}