:root {
    --bg: #FFF7FA;
    --surface: #FFFFFF;
    --surface-soft: #FFEAF2;
    --title: #4A1630;
    --text: #5C2A3E;
    --muted: #8A4A62;
    --soft-text: #B07A90;
    --pink: #E85A8B;
    --pink-bright: #FF7AA8;
    --pink-deep: #C43B6E;
    --pink-soft: #FFE1EC;
    --border: rgba(232,90,139,0.16);
    --shadow: 0 14px 34px rgba(196,59,110,0.10);
    --rail: 88px;
    --top: 56px;
    --radius: 20px;
    --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--text);
    background: var(--bg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
    font-size: 16px;
    line-height: 1.78;
    overflow-x: hidden;
}
body.layer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button, input { font: inherit; }
button { color: inherit; }
:focus-visible { outline: 3px solid rgba(232,90,139,.35); outline-offset: 3px; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 4000; padding: 10px 16px; background: var(--title); color: #fff; border-radius: 999px; }
.skip-link:focus { top: 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.side-rail {
    position: fixed; inset: 0 auto 0 0; z-index: 1100; width: var(--rail); background: var(--surface-soft); border-right: 1px solid var(--border); display: flex; flex-direction: column; align-items: center; padding: 14px 8px;
}
.rail-brand { width: 58px; height: 58px; border-radius: 18px; background: #fff; display: grid; place-items: center; box-shadow: var(--shadow); color: var(--pink-deep); font-weight: 800; }
.rail-brand img { width: 42px; height: 42px; object-fit: contain; border-radius: 13px; }
.rail-nav { width: 100%; display: flex; flex-direction: column; gap: 8px; margin-top: 20px; }
.rail-link { min-height: 52px; border-radius: 18px; display: grid; place-items: center; padding: 6px 4px; color: var(--muted); font-size: 13px; font-weight: 700; border: 1px solid transparent; background: transparent; cursor: pointer; }
.rail-link:hover { background: rgba(255,255,255,.72); color: var(--pink-deep); }
.rail-link.is-current { background: var(--pink-deep); color: #fff; box-shadow: 0 8px 20px rgba(196,59,110,.18); }
.rail-button { width: 100%; }

.top-strip { position: fixed; left: var(--rail); right: 0; top: 0; z-index: 1000; height: var(--top); background: rgba(255,247,250,.94); border-bottom: 1px solid var(--border); backdrop-filter: blur(12px); }
.top-strip-inner { max-width: calc(var(--max) + 48px); height: 100%; margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; }
.mobile-menu-button { visibility: hidden; justify-self: start; border: 0; background: transparent; min-width: 44px; min-height: 44px; border-radius: 999px; font-weight: 700; color: var(--pink-deep); }
.top-logo { justify-self: center; min-height: 44px; display: grid; place-items: center; color: var(--title); }
.top-logo img { max-height: 36px; width: auto; }
.top-logo strong { font-size: 18px; letter-spacing: .03em; }
.top-app-link { justify-self: end; min-height: 44px; display: inline-flex; align-items: center; padding: 0 18px; border-radius: 999px; background: linear-gradient(135deg,#FF7AA8 0%,#E85A8B 55%,#C43B6E 100%); color: #fff; font-weight: 800; }
.top-app-link:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(196,59,110,.18); }

.site-main { margin-left: calc(var(--rail) + 24px); padding: calc(var(--top) + 36px) 24px 72px; min-height: 80vh; }
.container { width: min(100%, var(--max)); margin: 0 auto; }
.hero-note { background: linear-gradient(145deg, #fff 0%, #fff 60%, #FFEAF2 100%); border: 1px solid var(--border); border-radius: 22px; padding: 34px; box-shadow: var(--shadow); }
.eyebrow { margin: 0 0 8px; color: var(--pink-deep); font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3 { color: var(--title); line-height: 1.28; }
h1 { margin: 0; font-size: clamp(28px, 4vw, 34px); letter-spacing: -.02em; }
h2 { font-size: 22px; margin: 0 0 14px; }
h3 { font-size: 18px; margin: 0 0 10px; }
p { margin: 0 0 1em; }
.hero-note .lead { max-width: 800px; margin-top: 16px; font-size: 17px; color: var(--text); }
.page-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.btn { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; padding: 0 20px; border-radius: 999px; font-weight: 800; border: 1px solid var(--border); }
.btn-primary { color: #fff; border: 0; background: linear-gradient(135deg,#FF7AA8 0%,#E85A8B 55%,#C43B6E 100%); }
.btn-secondary { background: #fff; color: var(--pink-deep); }
.btn:hover { transform: translateY(-1px); }

.section-space { margin-top: 34px; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.section-head p { margin: 0; color: var(--muted); max-width: 680px; }
.content-card, .info-card, .status-card, .letter-card, .faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.content-card { padding: 26px; }
.info-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
.info-card { padding: 24px; }
.info-card p:last-child, .content-card p:last-child { margin-bottom: 0; }
.tag { display: inline-flex; align-items: center; min-height: 30px; padding: 3px 11px; border-radius: 999px; background: var(--pink-soft); color: var(--pink-deep); font-size: 13px; font-weight: 800; }
.image-frame { margin-top: 22px; border-radius: 20px; overflow: hidden; border: 1px solid var(--border); background: var(--surface-soft); }
.content-image { width: 100%; max-height: 420px; object-fit: contain; background: #fff; }
.image-slot { width: 100%; min-height: 220px; background: linear-gradient(135deg, #FFEAF2, #FFF7FA 52%, #FFE1EC); position: relative; }
.image-slot::after { content: ""; position: absolute; inset: 28% 24%; border: 1px dashed rgba(196,59,110,.22); border-radius: 18px; }
.cover-image { width: 100%; max-height: 360px; object-fit: contain; background: #fff; }

.home-cover { padding: 34px; border-radius: 22px; border: 1px solid var(--border); background: #fff; box-shadow: var(--shadow); }
.home-cover .cover-copy { max-width: 850px; }
.home-cover .cover-copy p { max-width: 760px; margin-top: 16px; }
.home-cover .image-frame { margin-top: 28px; }
.polaroid-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; align-items: start; }
.polaroid { background: #fff; border: 1px solid var(--border); border-radius: 18px; padding: 12px 12px 20px; box-shadow: var(--shadow); transform: rotate(var(--tilt, 0deg)); }
.polaroid:nth-child(2) { --tilt: 1.2deg; margin-top: 20px; }
.polaroid:nth-child(3) { --tilt: -.8deg; }
.polaroid:nth-child(4) { --tilt: 1.6deg; margin-top: 10px; }
.polaroid:nth-child(5) { --tilt: -.9deg; }
.polaroid:nth-child(6) { --tilt: .7deg; margin-top: 18px; }
.polaroid .polaroid-media { border-radius: 14px; overflow: hidden; background: var(--surface-soft); margin-bottom: 16px; }
.polaroid img { width: 100%; max-height: 260px; object-fit: contain; background: #fff; }
.polaroid .image-slot { min-height: 180px; }
.polaroid h3 { margin: 0 0 8px; }
.polaroid p { margin: 0; color: var(--muted); }
.notebook { background: #fff; border: 1px solid var(--border); border-radius: 22px; padding: 28px; box-shadow: var(--shadow); background-image: linear-gradient(to bottom, transparent 31px, rgba(232,90,139,.10) 32px); background-size: 100% 32px; }
.notebook-entry { display: grid; grid-template-columns: 74px 1fr; gap: 18px; padding: 16px 0; }
.notebook-entry strong { color: var(--pink-deep); font-size: 20px; }
.notebook-entry p { margin: 0; background: rgba(255,255,255,.86); }
.album-shelf { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
.album-book { min-height: 300px; padding: 22px 18px; border-radius: 16px 22px 22px 16px; background: linear-gradient(160deg, #fff 0%, #FFEAF2 100%); border: 1px solid var(--border); box-shadow: 8px 10px 24px rgba(196,59,110,.10); display: flex; flex-direction: column; justify-content: space-between; }
.album-book .book-no { font-size: 13px; color: var(--pink-deep); font-weight: 800; }
.album-book p { color: var(--muted); margin-bottom: 0; }
.number-list { display: grid; gap: 14px; }
.number-item { display: grid; grid-template-columns: 82px 1fr; gap: 18px; align-items: start; padding: 22px; background: #fff; border: 1px solid var(--border); border-radius: 18px; }
.number-item .big-no { font-size: 42px; line-height: 1; font-weight: 900; color: var(--pink); letter-spacing: -.05em; }
.status-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; }
.status-card { padding: 22px; }
.status-card .status { display: inline-flex; min-height: 30px; padding: 3px 10px; border-radius: 999px; background: var(--pink-deep); color: #fff; font-size: 13px; font-weight: 800; margin-bottom: 14px; }
.letter-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
.letter-card { padding: 28px; position: relative; }
.letter-card::before { content: "“"; position: absolute; right: 20px; top: 4px; font-size: 72px; color: rgba(232,90,139,.12); font-family: Georgia, serif; }
.letter-card .opinion { color: var(--pink-deep); font-weight: 800; font-size: 13px; }

.story-prose { max-width: 820px; margin: 0 auto; }
.story-prose p { margin-bottom: 1.25em; }
.step-list { display: grid; gap: 16px; }
.step-item { display: grid; grid-template-columns: 64px 1fr; gap: 18px; padding: 24px; border-radius: 20px; background: #fff; border: 1px solid var(--border); }
.step-item .step-no { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 16px; background: var(--pink-soft); color: var(--pink-deep); font-weight: 900; }
.topic-covers { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 14px; }
.topic-cover { min-height: 220px; padding: 20px; border-radius: 18px; border: 1px solid var(--border); background: linear-gradient(145deg,#fff,#FFEAF2); display: flex; flex-direction: column; justify-content: end; }
.topic-cover p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
.policy-sections { display: grid; gap: 18px; }
.policy-sections article { background: #fff; border: 1px solid var(--border); border-radius: 20px; padding: 26px; }
.policy-sections article p:last-child { margin-bottom: 0; }
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 24px; }
.faq-item h2 { font-size: 18px; }
.contact-channels { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.contact-channels article { padding: 24px; border: 1px solid var(--border); border-radius: 20px; background: #fff; }
.app-inline-brand { display: flex; gap: 14px; align-items: center; margin-bottom: 14px; }
.app-mini-icon { width: 58px; height: 58px; object-fit: contain; border-radius: 16px; }
.app-inline-brand h3 { margin-top: 8px; }
.topic-link { margin-top: 16px; }
.notice { padding: 20px 22px; border-radius: 18px; background: var(--pink-soft); color: var(--title); border: 1px solid var(--border); }
.notice strong { color: var(--pink-deep); }

.site-footer { margin-left: var(--rail); background: var(--title); color: #F8D6E4; padding: 48px 24px 36px; }
.footer-inner { width: min(100%, var(--max)); margin: 0 auto; }
.footer-brand { max-width: 640px; }
.footer-logo { display: inline-flex; align-items: center; min-height: 44px; color: #fff; font-size: 22px; font-weight: 900; }
.footer-logo img { max-height: 36px; width: auto; }
.footer-en { margin-top: 4px; font-size: 13px; letter-spacing: .16em; color: #F2B7CE; }
.footer-groups { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 24px; margin-top: 34px; }
.footer-groups h2 { color: #fff; font-size: 16px; }
.footer-groups a { display: block; min-height: 34px; color: #F8D6E4; }
.footer-groups a:hover { color: #fff; }
.footer-note { margin-top: 34px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.14); color: #EEC0D3; font-size: 14px; }

.site-overlay { position: fixed; inset: 0; z-index: 1800; background: rgba(74,22,48,.32); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .2s ease, visibility .2s ease; }
.site-overlay.is-open { opacity: 1; visibility: visible; pointer-events: auto; }
.menu-layer, .search-layer { position: fixed; inset: 0; z-index: 1900; visibility: hidden; opacity: 0; pointer-events: none; transition: opacity .2s ease, visibility .2s ease; }
.menu-layer.is-open, .search-layer.is-open { visibility: visible; opacity: 1; pointer-events: auto; }
.menu-layer { background: var(--bg); overflow-y: auto; }
.menu-shell { width: min(100%, 1220px); margin: 0 auto; padding: 28px 24px 60px; }
.layer-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 26px; }
.layer-brand { min-height: 44px; display: flex; align-items: center; color: var(--title); }
.layer-brand img { max-height: 36px; width: auto; }
.layer-close { min-width: 64px; min-height: 44px; border-radius: 999px; border: 1px solid var(--border); background: #fff; color: var(--pink-deep); font-weight: 800; cursor: pointer; }
.menu-grid { display: grid; grid-template-columns: 1fr; gap: 18px; }
.menu-group { background: #fff; border: 1px solid var(--border); border-radius: 22px; padding: 22px; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px; }
.menu-group h2 { font-size: 18px; grid-column: 1 / -1; }
.menu-group a { display: block; padding: 14px 12px; border-radius: 14px; }
.menu-group a:hover { background: var(--surface-soft); }
.menu-group strong, .menu-group span { display: block; }
.menu-group strong { color: var(--title); }
.menu-group span { color: var(--muted); font-size: 14px; margin-top: 2px; }
.search-layer { display: grid; place-items: center; padding: 20px; }
.search-card { width: min(100%, 620px); max-height: calc(100vh - 40px); overflow-y: auto; background: #fff; border-radius: 22px; border: 1px solid var(--border); box-shadow: 0 24px 70px rgba(74,22,48,.22); padding: 26px; }
.search-head { display: flex; justify-content: space-between; gap: 20px; align-items: start; }
.search-head h2 { margin-bottom: 0; }
.search-box { display: block; margin-top: 20px; }
.search-box input { width: 100%; min-height: 50px; border: 1px solid var(--border); border-radius: 999px; background: var(--bg); color: var(--text); padding: 0 18px; }
.search-links { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; margin-top: 16px; }
.search-links a { min-height: 44px; display: flex; align-items: center; padding: 9px 14px; border-radius: 14px; background: var(--surface-soft); color: var(--pink-deep); font-weight: 800; }
.search-links a[hidden] { display: none; }
.search-empty { color: var(--muted); margin: 18px 0 0; }

.mobile-bottom-nav { display: none; }

@media (max-width: 980px) {
    .polaroid-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .album-shelf, .status-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .topic-covers { grid-template-columns: repeat(3,minmax(0,1fr)); }
    .footer-groups { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 760px) {
    :root { --top: 56px; }
    .side-rail { display: none; }
    .top-strip { left: 0; }
    .top-strip-inner { padding: 0 12px; grid-template-columns: minmax(64px,1fr) auto minmax(64px,1fr); }
    .mobile-menu-button { visibility: visible; display: inline-flex; align-items: center; justify-content: center; padding: 0 10px; cursor: pointer; }
    .top-logo img { max-width: 138px; }
    .top-app-link { padding: 0 12px; font-size: 14px; }
    .site-main { margin-left: 0; padding: calc(var(--top) + 24px) 16px calc(82px + env(safe-area-inset-bottom)); }
    .hero-note, .home-cover { padding: 24px 20px; }
    .info-grid, .letter-grid, .contact-channels { grid-template-columns: 1fr; }
    .polaroid-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; }
    .polaroid { padding: 10px 10px 16px; }
    .polaroid p { font-size: 14px; }
    .notebook { padding: 20px 18px; }
    .notebook-entry { grid-template-columns: 56px 1fr; gap: 12px; }
    .album-shelf { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; }
    .album-book { min-height: 240px; }
    .number-item { grid-template-columns: 60px 1fr; padding: 18px; }
    .number-item .big-no { font-size: 34px; }
    .status-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .topic-covers { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .step-item { grid-template-columns: 52px 1fr; padding: 20px 18px; }
    .site-footer { margin-left: 0; padding: 42px 16px calc(78px + env(safe-area-inset-bottom)); }
    .menu-shell { padding: 18px 16px 88px; }
    .menu-grid { grid-template-columns: 1fr; gap: 12px; }
    .menu-group { padding: 16px; grid-template-columns: repeat(2,minmax(0,1fr)); }
    .mobile-bottom-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 1200; height: calc(50px + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom); background: rgba(255,255,255,.97); border-top: 1px solid var(--border); display: grid; grid-template-columns: repeat(5,1fr); }
    .mobile-bottom-nav a { min-width: 0; min-height: 50px; display: grid; place-items: center; color: var(--muted); font-size: 13px; font-weight: 700; }
    .mobile-bottom-nav a.is-current { color: var(--pink); }
}

@media (max-width: 520px) {
    .polaroid-grid { grid-template-columns: 1fr; }
    .polaroid:nth-child(n) { margin-top: 0; transform: none; }
    .album-shelf { grid-template-columns: 1fr 1fr; }
    .status-grid { grid-template-columns: 1fr; }
    .footer-groups { grid-template-columns: 1fr 1fr; gap: 18px 12px; }
    .menu-grid { grid-template-columns: 1fr; }
    .menu-group { padding: 14px; grid-template-columns: repeat(2,minmax(0,1fr)); }
    .menu-group a { padding: 12px 8px; }
    .menu-group span { font-size: 13px; }
    .search-card { padding: 22px 18px; }
    .search-links { grid-template-columns: 1fr; }
    .topic-covers { grid-template-columns: 1fr; }
    .page-actions .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}