:root{color-scheme:light;--bg:#f7f2e8;--surface:#fffdf8;--surface-strong:#fff8ef;--text:#241f1a;--muted:#6d6258;--line:rgba(62,45,31,.12);--accent:#b24a2e;--accent-soft:#f4dfd4;--green:#4f7c65;--blue:#506d88;--gold:#c28b34;--shadow:0 10px 30px rgba(36,31,26,.08);--radius-sm:8px;--radius-md:14px;--radius-lg:20px;--container:1180px}
*{box-sizing:border-box}
html{background:var(--bg);color:var(--text);font-family:Noto Sans SC,PingFang SC,Microsoft YaHei,sans-serif;line-height:1.6;-webkit-text-size-adjust:100%}
body{margin:0;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button,input{font:inherit}
.container{width:min(100% - 32px,var(--container));margin:0 auto}
.site-shell{min-height:100vh;display:flex;flex-direction:column}
.site-main{flex:1}
.site-header{position:sticky;top:0;z-index:40;backdrop-filter:blur(16px);background:#f7f2e8db;border-bottom:1px solid var(--line)}
.site-header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 0}
.brand{display:flex;align-items:center;gap:14px}
.brand-mark{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,#f4dfd4,#f3ebd6);color:var(--accent);font-size:20px;font-weight:700;box-shadow:var(--shadow)}
.brand-copy strong,.brand-copy span{display:block}
.brand-copy strong{font-size:1rem}
.brand-copy span{color:var(--muted);font-size:.85rem}
.nav-links{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}
.nav-links a{padding:8px 12px;border-radius:999px;color:var(--muted);transition:background-color .16s ease,color .16s ease}
.nav-links a:hover,.nav-links a.active{background:var(--surface);color:var(--text)}
.page-section{padding:26px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
.section-head h2,.section-head h3{margin:0;font-size:clamp(1.4rem,2vw,2rem)}
.section-head p{margin:6px 0 0;color:var(--muted)}
.card-grid,.textbook-grid{display:grid;gap:18px}
.card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.textbook-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.poem-card{border-radius:var(--radius-md);overflow:hidden;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow)}
.poem-card-link{display:block}
.poem-card-visual{aspect-ratio:16/10;background:radial-gradient(circle at top left,rgba(79,124,101,.18),transparent 36%),linear-gradient(145deg,#f6efe5,#f2e3d1);display:grid;place-items:center;color:var(--muted);text-align:center;padding:18px;border-bottom:1px solid var(--line)}
.poem-card-body{padding:18px}
.poem-card-body h3{margin:0 0 8px;font-size:1.12rem}
.poem-card-title-link:hover{color:var(--accent)}
.poem-card-body p{margin:0;color:var(--muted)}
.poem-card-meta a:hover{color:var(--accent)}
.poem-card-textbook{margin-top:10px;font-size:.9rem;color:var(--muted)}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{display:inline-flex;align-items:center;min-height:28px;padding:0 10px;border-radius:999px;font-size:.82rem;border:1px solid var(--line);background:var(--surface-strong);color:var(--muted)}
.chip.accent{background:var(--accent-soft);color:var(--accent);border-color:transparent}
.textbook-grade-card{border-radius:var(--radius-md);padding:18px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow)}
.textbook-grade-card h3{margin:0 0 8px}
.textbook-grade-card p{color:var(--muted);margin:0 0 14px}
.textbook-grade-card ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.textbook-grade-card li a{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 12px;border-radius:12px;background:var(--surface-strong)}
.grade-link-copy{display:grid;gap:2px}
.grade-link-copy strong{font-size:1rem}
.grade-link-meta{color:var(--muted);font-size:.88rem}
.grade-link-badge{flex-shrink:0;border-radius:999px;padding:6px 10px;background:#4f7c651f;color:var(--green);font-size:.82rem}
.empty-state{padding:24px;border-radius:18px;background:var(--surface);border:1px dashed var(--line);color:var(--muted)}
.site-footer{padding:40px 0;color:var(--muted);border-top:1px solid var(--line);margin-top:20px}
.site-footer .container{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px}
.footer-links{display:flex;flex-wrap:wrap;gap:16px}
.footer-links a:hover{color:var(--accent)}
.poem-detail-page{padding:32px 0}
.detail-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(320px,.9fr);gap:18px;align-items:start}
.poem-panel{border-radius:var(--radius-lg);padding:24px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow)}
.poem-panel h1{margin:10px 0 12px;font-size:clamp(2rem,3vw,3rem)}
.poem-lines{margin:22px 0 0;padding:24px;border-radius:18px;background:var(--surface-strong);border:1px solid var(--line)}
.poem-line{text-align:center;font-size:clamp(1.35rem,3vw,1.9rem);line-height:1.95;margin:0}
.poem-pinyin{display:none;text-align:center;color:var(--muted);font-size:.95rem;margin:0}
.poem-lines.show-pinyin .poem-pinyin{display:block}
.poem-lines.show-pinyin .poem-line{margin-top:4px}
.meta-row{display:flex;flex-wrap:wrap;gap:12px;color:var(--muted)}
.meta-link{color:inherit}
.meta-link:hover{color:var(--accent)}
.media-panel{display:grid;gap:18px;border-radius:var(--radius-lg);padding:24px}
.media-box,.detail-note{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow)}
.detail-note p,.media-box p{margin:8px 0 0;color:var(--muted)}
.media-preview-trigger{display:block;width:100%;margin-top:12px;padding:0;border:0;border-radius:14px;overflow:hidden;background:var(--surface-strong);color:inherit;text-align:left}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 16px;border-radius:999px;border:1px solid transparent;background:var(--text);color:#fff;cursor:pointer}
.btn:hover{opacity:.9}
.btn.secondary{background:transparent;color:var(--text);border-color:var(--line)}
.search-shell{padding:52px 0 72px}
.search-input-wrap{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:12px;min-height:60px;padding:0 18px;border-radius:18px;border:1px solid var(--line);background:var(--surface-strong)}
.search-input-icon{color:var(--muted);font-size:.95rem}
.search-input-wrap input{width:100%;border:0;outline:0;background:transparent;color:var(--text);font-size:1rem}
.search-status{margin:0;color:var(--muted)}
.search-results{display:grid;gap:14px}
.search-result-item{padding:18px 0 0;border-top:1px solid var(--line)}
.search-result-item:first-child{padding-top:0;border-top:0}
.search-result-item h3{margin:0 0 8px;font-size:1.12rem}
.search-result-item h3 a:hover{color:var(--accent)}
.search-result-excerpt{margin:0;color:var(--muted)}
.login-page{display:flex;align-items:center;justify-content:center;min-height:70vh;padding:32px 0}
.login-card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow)}
.login-card h1{margin:0 0 6px;font-size:24px;text-align:center}
.login-card .sub{margin:0 0 22px;font-size:14px;color:var(--muted);text-align:center}
.field{display:block;margin:0 0 16px}
.field label{display:block;margin:0 0 6px;font-size:13px;font-weight:600}
.field input{width:100%;height:42px;border:1px solid var(--line);border-radius:10px;padding:0 12px;font-size:15px;outline:none;background:var(--surface)}
.field input:focus{border-color:var(--accent)}
.login-card .btn{width:100%;margin-top:8px}
.login-card .error{display:none;margin:12px 0 0;padding:10px 12px;border-radius:10px;background:#fef2f2;border:1px solid #fecaca;color:#dc2626;font-size:13px}
.login-card .error.show{display:block}
.login-card .small{margin:16px 0 0;text-align:center;font-size:12px;color:var(--muted)}
.privacy-page{padding:32px 0}
.privacy-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow);max-width:800px;margin:0 auto}
.privacy-card h1{margin:0 0 8px;font-size:clamp(1.5rem,3vw,2rem)}
.privacy-card .updated{color:var(--muted);font-size:.9rem;margin:0 0 24px}
.privacy-card h2{margin:28px 0 12px;font-size:1.2rem}
.privacy-card p,.privacy-card ul{margin:0 0 12px;color:var(--text)}
.privacy-card ul{padding-left:20px}
.privacy-card li{margin:4px 0}
.hero{padding:52px 0 28px}
.hero-copy{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:var(--radius-lg);padding:28px}
.hero-copy h1{margin:18px 0 14px;font-size:clamp(2rem,4vw,3.5rem);line-height:1.12;font-weight:700}
.hero-copy p{color:var(--muted);max-width:42rem;margin:0}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.textbook-page{padding:32px 0}
.textbook-page h1{margin:0 0 8px}
.textbook-description{color:var(--muted);margin:0 0 24px}
.poem-list{display:grid;gap:18px}
.poem-entry{display:flex;gap:18px;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow);align-items:start}
.poem-entry-visual{width:120px;flex-shrink:0;border-radius:12px;overflow:hidden;background:radial-gradient(circle at top left,rgba(79,124,101,.18),transparent 36%),linear-gradient(145deg,#f6efe5,#f2e3d1)}
.poem-entry-visual-placeholder{width:120px;height:80px;display:grid;place-items:center;color:var(--muted);font-size:.8rem}
.poem-entry-body{flex:1;min-width:0}
.poem-entry-body h3{margin:0 0 4px;font-size:1.1rem}
.poem-entry-body h3 a:hover{color:var(--accent)}
.poem-entry-meta{color:var(--muted);font-size:.88rem;margin:0 0 6px}
.poem-entry-lines{color:var(--muted);margin:0;font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.poem-entry-lines a:hover{color:var(--accent)}
.all-poems-page{padding:32px 0}
.poem-count{color:var(--muted);margin:0 0 24px}
.poem-index-list{display:grid;gap:14px}
.poem-index-item{padding:14px 18px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow);display:flex;justify-content:space-between;align-items:center;gap:12px}
.poem-index-item:hover{border-color:var(--accent)}
.poem-index-item h3{margin:0;font-size:1rem}
.poem-index-item .meta{color:var(--muted);font-size:.85rem;text-align:right}
@media(max-width:1080px){.detail-grid{grid-template-columns:1fr}.card-grid,.textbook-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:720px){.container{width:min(100% - 24px,var(--container))}.site-header-inner{flex-direction:column;align-items:stretch}.nav-links{justify-content:flex-start}.card-grid,.textbook-grid{grid-template-columns:1fr}.poem-entry{flex-direction:column}.poem-entry-visual{width:100%}.hero-copy{padding:20px}.hero-actions{flex-direction:column}.hero-actions .btn{width:100%}.textbook-grade-card li a{flex-direction:column;align-items:flex-start}.privacy-card{padding:20px}}
@media(max-width:420px){.brand-copy span{display:none}.nav-links a{padding:8px 10px;font-size:.92rem}}