/* ============================================================
   899卡盟 引导页 · 样式表
   极光背景 / 玻璃拟态 / 深浅双主题 / 响应式
   ============================================================ */

/* ---------- 变量：深色主题（默认） ---------- */
:root,
[data-theme="dark"] {
  --bg: #0a0a14;
  --bg-soft: #12121f;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.10);
  --border-strong: rgba(255, 255, 255, 0.18);
  --text: #f0f0f8;
  --text-dim: #a0a0b8;
  --text-muted: #6b6b85;
  --accent: #a855f7;
  --accent-2: #06b6d4;
  --accent-3: #ec4899;
  --grad: linear-gradient(135deg, #a855f7 0%, #6366f1 50%, #06b6d4 100%);
  --grad-warm: linear-gradient(135deg, #f59e0b 0%, #ec4899 100%);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --nav-bg: rgba(10, 10, 20, 0.7);
  --blob-1: rgba(168, 85, 247, 0.5);
  --blob-2: rgba(6, 182, 212, 0.4);
  --blob-3: rgba(236, 72, 153, 0.4);
  --blob-4: rgba(99, 102, 241, 0.4);
}

/* ---------- 变量：浅色主题 ---------- */
[data-theme="light"] {
  --bg: #f4f4fb;
  --bg-soft: #ffffff;
  --surface: rgba(255, 255, 255, 0.65);
  --surface-hover: rgba(255, 255, 255, 0.9);
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.14);
  --text: #1a1a2e;
  --text-dim: #555570;
  --text-muted: #8888a0;
  --accent: #8b5cf6;
  --accent-2: #0891b2;
  --accent-3: #db2777;
  --grad: linear-gradient(135deg, #8b5cf6 0%, #6366f1 50%, #0891b2 100%);
  --grad-warm: linear-gradient(135deg, #f59e0b 0%, #db2777 100%);
  --shadow: 0 8px 32px rgba(99, 102, 241, 0.12);
  --shadow-lg: 0 20px 60px rgba(99, 102, 241, 0.18);
  --nav-bg: rgba(244, 244, 251, 0.75);
  --blob-1: rgba(139, 92, 246, 0.35);
  --blob-2: rgba(8, 145, 178, 0.28);
  --blob-3: rgba(219, 39, 119, 0.25);
  --blob-4: rgba(99, 102, 241, 0.28);
}

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', 'Space Grotesk', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background .5s ease, color .5s ease;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; }

::selection { background: var(--accent); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* 极光背景 */
.aurora { position: fixed; inset: 0; z-index: -2; overflow: hidden; pointer-events: none; }
.blob {
  position: absolute; width: 50vw; height: 50vw; max-width: 700px; max-height: 700px;
  border-radius: 50%; filter: blur(80px); opacity: .7;
  will-change: transform; transform: translateZ(0);
}
.blob-1 { background: var(--blob-1); top: -10%; left: -5%; animation: drift1 22s ease-in-out infinite; }
.blob-2 { background: var(--blob-2); top: 30%; right: -10%; animation: drift2 26s ease-in-out infinite; }
.blob-3 { background: var(--blob-3); bottom: -10%; left: 20%; animation: drift3 30s ease-in-out infinite; }
.blob-4 { background: var(--blob-4); top: 50%; left: 40%; animation: drift4 24s ease-in-out infinite; }

@keyframes drift1 { 0%,100%{transform:translate(0,0) scale(1)} 50%{transform:translate(15vw,10vh) scale(1.15)} }
@keyframes drift2 { 0%,100%{transform:translate(0,0) scale(1)} 50%{transform:translate(-12vw,8vh) scale(.9)} }
@keyframes drift3 { 0%,100%{transform:translate(0,0) scale(1)} 50%{transform:translate(10vw,-12vh) scale(1.2)} }
@keyframes drift4 { 0%,100%{transform:translate(0,0) scale(.9)} 50%{transform:translate(-8vw,-6vh) scale(1.1)} }

.grain {
  position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* 导航栏 */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem clamp(1.2rem, 4vw, 3rem);
  background: transparent;
  transition: background .4s ease, backdrop-filter .4s ease, border-color .4s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: var(--nav-bg); backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%); border-bottom-color: var(--border);
}
.nav-logo { display: flex; align-items: center; gap: .5rem; font-weight: 700; font-size: 1.25rem; letter-spacing: -.02em; }
.logo-mark { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; font-size: 1.4rem; }
.nav-links { display: flex; gap: .35rem; }
.nav-links a { padding: .5rem 1rem; border-radius: 99px; font-size: .9rem; color: var(--text-dim); transition: all .25s ease; }
.nav-links a:hover { color: var(--text); background: var(--surface); }
.nav-actions { display: flex; align-items: center; gap: .6rem; }
.theme-toggle { width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; background: var(--surface); border: 1px solid var(--border); font-size: 1.05rem; transition: all .25s ease; }
.theme-toggle:hover { background: var(--surface-hover); transform: rotate(20deg); }
[data-theme="dark"] .theme-icon-light { display: none; }
[data-theme="light"] .theme-icon-dark { display: none; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; gap: .5rem; padding: .65rem 1.4rem; border-radius: 99px; font-size: .92rem; font-weight: 500; transition: all .3s cubic-bezier(.4,0,.2,1); white-space: nowrap; cursor: pointer; }
.btn-lg { padding: .85rem 2rem; font-size: 1rem; }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 4px 20px rgba(168, 85, 247, 0.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(168, 85, 247, 0.5); }
.btn-primary .arrow { transition: transform .3s ease; }
.btn-primary:hover .arrow { transform: translateX(4px); }
.btn-glass { background: var(--surface); color: var(--text); border: 1px solid var(--border-strong); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.btn-glass:hover { background: var(--surface-hover); transform: translateY(-2px); }
.btn-ghost { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--surface-hover); border-color: var(--border-strong); }

/* 通用 Section */
.section { max-width: 1200px; margin: 0 auto; padding: 5rem 1.5rem; }
.shortcuts-section { padding-top: 7rem; padding-bottom: 3rem; }
.section-head { text-align: center; margin-bottom: 3rem; }
.section-tag { display: inline-block; font-family: 'Space Grotesk', sans-serif; font-size: .72rem; font-weight: 600; letter-spacing: .2em; color: var(--accent); margin-bottom: .75rem; }
.section-head h2 { font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif; font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700; letter-spacing: -.02em; margin-bottom: .75rem; }
.section-head p { color: var(--text-dim); font-size: 1rem; }
.platform-notice { display: inline-block; max-width: 900px; margin: .15rem auto 1rem; padding: .85rem 1.2rem; border: 1px solid var(--border); border-radius: 18px; background: var(--surface); }
.platform-notice p { margin: .2rem 0; color: var(--text); font-size: clamp(.95rem, 2vw, 1.08rem); font-weight: 600; line-height: 1.65; }

/* 快捷导航卡片 */
.shortcuts-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 1.25rem; content-visibility: auto; contain-intrinsic-size: auto 300px; }
.shortcut-card { position: relative; display: flex; flex-direction: column; align-items: center; gap: .75rem; padding: 2rem 1.25rem; border-radius: 20px; background: var(--surface); border: 1px solid var(--border); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); transition: transform .35s cubic-bezier(.4,0,.2,1), box-shadow .35s ease, border-color .35s ease; overflow: hidden; contain: layout style paint; }
.shortcut-card::before { content: ''; position: absolute; inset: 0; background: var(--card-grad, var(--grad)); opacity: 0; transition: opacity .35s ease; z-index: -1; }
.shortcut-card:hover { transform: translateY(-6px); border-color: transparent; box-shadow: var(--shadow-lg); }
.shortcut-card:hover::before { opacity: .12; }
.sc-icon { width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center; font-size: 1.6rem; background: var(--card-grad, var(--grad)); color: #fff; box-shadow: 0 6px 18px rgba(0,0,0,.2); transition: transform .35s ease; }
.shortcut-card:hover .sc-icon { transform: scale(1.1) rotate(-6deg); }
.sc-name { font-weight: 600; font-size: 1rem; }
.sc-desc { font-size: .78rem; color: var(--text-muted); text-align: center; }
.sc-arrow { position: absolute; top: 1rem; right: 1rem; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; font-size: .9rem; background: var(--surface-hover); opacity: 0; transform: translateX(6px); transition: all .3s ease; }
.shortcut-card:hover .sc-arrow { opacity: 1; transform: translateX(0); }

/* 工具栏 */
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 2rem; }
.filter-tabs { display: flex; gap: .5rem; flex-wrap: wrap; }
.tab { padding: .5rem 1.1rem; border-radius: 99px; font-size: .85rem; color: var(--text-dim); background: var(--surface); border: 1px solid var(--border); transition: all .25s ease; }
.tab:hover { color: var(--text); border-color: var(--border-strong); }
.tab.active { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 4px 14px rgba(168, 85, 247, .3); }
.search-box { position: relative; display: flex; align-items: center; }
.search-icon { position: absolute; left: 1rem; font-size: 1.05rem; color: var(--text-muted); }
.search-box input { padding: .6rem 1rem .6rem 2.6rem; border-radius: 99px; background: var(--surface); border: 1px solid var(--border); color: var(--text); font-size: .88rem; width: 240px; transition: all .25s ease; }
.search-box input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(168, 85, 247, .15); background: var(--bg-soft); }
.search-box input::placeholder { color: var(--text-muted); }

/* 文章卡片网格 */
.articles-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 1.5rem; content-visibility: auto; contain-intrinsic-size: auto 500px; }
.article-card { display: flex; flex-direction: column; border-radius: 20px; overflow: hidden; background: var(--surface); border: 1px solid var(--border); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); transition: transform .4s cubic-bezier(.4,0,.2,1), box-shadow .4s ease, border-color .4s ease; cursor: pointer; contain: layout style paint; }
.article-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow-lg); }
.ac-cover { height: 160px; position: relative; overflow: hidden; background: var(--ac-grad, var(--grad)); }
.ac-cover::after { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 70% 20%, rgba(255,255,255,.25), transparent 50%); }
.ac-cover-pattern { position: absolute; inset: 0; opacity: .15; background-image: radial-gradient(circle, #fff 1px, transparent 1px); background-size: 20px 20px; }
.ac-cat { position: absolute; top: 1rem; left: 1rem; padding: .25rem .75rem; border-radius: 99px; font-size: .72rem; font-weight: 600; color: #fff; background: rgba(0,0,0,.35); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.ac-delete { position: absolute; top: 1rem; right: 1rem; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; font-size: .8rem; background: rgba(0,0,0,.4); color: #fff; backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); opacity: 0; transition: all .25s ease; }
.article-card:hover .ac-delete { opacity: 1; }
.ac-delete:hover { background: rgba(239,68,68,.8); transform: scale(1.1); }
.ac-body { padding: 1.25rem; display: flex; flex-direction: column; flex: 1; }
.ac-title { font-size: 1.1rem; font-weight: 600; line-height: 1.4; margin-bottom: .5rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.ac-excerpt { font-size: .88rem; color: var(--text-dim); flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 1rem; }
.ac-meta { display: flex; align-items: center; justify-content: space-between; font-size: .78rem; color: var(--text-muted); }
.ac-link-badge { display: inline-flex; align-items: center; gap: .3rem; color: var(--accent); font-weight: 500; }
.empty-state { text-align: center; padding: 4rem 1rem; color: var(--text-muted); }
.empty-icon { font-size: 3rem; margin-bottom: 1rem; }

/* SEO 内容区 */
.seo-section { padding-top: 2rem; padding-bottom: 3rem; }
.seo-card { max-width: 980px; margin: 0 auto; padding: 1.5rem 1.6rem; border: 1px solid var(--border); border-radius: 24px; background: var(--surface); box-shadow: var(--shadow); }
.seo-card p { color: var(--text-dim); font-size: .98rem; line-height: 1.9; }
.seo-card p + p { margin-top: 1rem; }
.seo-guides { padding-top: 2rem; }
.guide-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1.2rem; }
.guide-card { display: block; padding: 1.35rem; border: 1px solid var(--border); border-radius: 20px; background: var(--surface); transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease; contain: layout style paint; }
.guide-card:hover { transform: translateY(-5px); border-color: var(--border-strong); box-shadow: var(--shadow-lg); }
.guide-card span { display: inline-flex; margin-bottom: .75rem; padding: .2rem .65rem; border-radius: 99px; background: var(--grad); color: #fff; font-size: .72rem; font-weight: 600; }
.guide-card h3 { font-size: 1.05rem; line-height: 1.45; margin-bottom: .55rem; }
.guide-card p { color: var(--text-dim); font-size: .86rem; line-height: 1.7; }
.article-page { padding-top: 8rem; }
.article-page h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); line-height: 1.25; margin: .5rem 0 1.2rem; }
.article-page h2 { margin: 1.8rem 0 .8rem; font-size: 1.35rem; }

/* 关于区 */
.section-about { padding-top: 2rem; }
.about-card { display: grid; grid-template-columns: 1.2fr .8fr; gap: 3rem; align-items: center; padding: 3rem; border-radius: 28px; background: var(--surface); border: 1px solid var(--border); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); }
.about-left h2 { font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif; font-size: clamp(1.6rem, 3.5vw, 2.2rem); font-weight: 700; margin: .5rem 0 1rem; letter-spacing: -.02em; }
.about-desc { color: var(--text-dim); margin-bottom: 1.75rem; }
.feature-list { list-style: none; display: grid; gap: .75rem; }
.feature-list li { display: flex; align-items: center; gap: .65rem; font-size: .92rem; color: var(--text-dim); }
.fi { width: 32px; height: 32px; border-radius: 10px; display: grid; place-items: center; font-size: 1rem; background: var(--surface-hover); flex-shrink: 0; }

/* 轨道动画 */
.about-right { display: grid; place-items: center; }
.orbit { position: relative; width: 240px; height: 240px; display: grid; place-items: center; }
.orbit-core { width: 60px; height: 60px; border-radius: 18px; display: grid; place-items: center; font-size: 1.8rem; color: #fff; background: var(--grad); box-shadow: 0 8px 30px rgba(168,85,247,.4); }
.orbit-ring { position: absolute; border: 1px solid var(--border); border-radius: 50%; }
.r1 { width: 130px; height: 130px; animation: spin 12s linear infinite; }
.r2 { width: 190px; height: 190px; animation: spin 20s linear infinite reverse; }
.r3 { width: 240px; height: 240px; animation: spin 28s linear infinite; }
.orbit-dot { position: absolute; top: -5px; left: 50%; transform: translateX(-50%); width: 10px; height: 10px; border-radius: 50%; }
.d1 { background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.d2 { background: var(--accent-2); box-shadow: 0 0 12px var(--accent-2); }
.d3 { background: var(--accent-3); box-shadow: 0 0 12px var(--accent-3); }
@keyframes spin { to { transform: rotate(360deg); } }

/* 页脚 */
.footer { border-top: 1px solid var(--border); margin-top: 3rem; padding: 2.5rem 1.5rem; }
.footer-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.footer-brand { font-weight: 600; font-size: 1.05rem; display: flex; align-items: center; gap: .5rem; }
.footer-text { font-size: .85rem; color: var(--text-muted); }
.footer-links { display: flex; gap: 1.25rem; }
.footer-links a { font-size: .88rem; color: var(--text-dim); transition: color .2s; }
.footer-links a:hover { color: var(--accent); }

/* 弹窗 */
.modal-overlay[hidden] { display: none !important; }
.modal-overlay { position: fixed; inset: 0; z-index: 200; display: grid; place-items: center; padding: 1.5rem; background: rgba(0,0,0,.6); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); animation: fadeIn .3s ease; }
@keyframes fadeIn { from{opacity:0} to{opacity:1} }
.modal { position: relative; width: 100%; max-width: 560px; max-height: 88vh; overflow-y: auto; padding: 2rem; border-radius: 24px; background: var(--bg-soft); border: 1px solid var(--border-strong); box-shadow: var(--shadow-lg); animation: slideUp .4s cubic-bezier(.4,0,.2,1); }
.modal-detail { max-width: 680px; }
@keyframes slideUp { from{opacity:0;transform:translateY(30px)} to{opacity:1;transform:translateY(0)} }
.modal-close { position: absolute; top: 1.25rem; right: 1.25rem; width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; font-size: 1rem; background: var(--surface); border: 1px solid var(--border); transition: all .2s ease; z-index: 2; }
.modal-close:hover { background: var(--surface-hover); transform: rotate(90deg); }
.modal-title { font-size: 1.4rem; font-weight: 700; margin-bottom: 1.5rem; }
.modal-form { display: grid; gap: 1.1rem; }
.field { display: grid; gap: .4rem; }
.field span { font-size: .82rem; font-weight: 500; color: var(--text-dim); }
.field input, .field select, .field textarea { padding: .7rem .9rem; border-radius: 12px; background: var(--surface); border: 1px solid var(--border); color: var(--text); font-size: .92rem; transition: all .25s ease; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(168,85,247,.15); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.modal-actions { display: flex; gap: .75rem; justify-content: flex-end; margin-top: .5rem; }

/* 详情弹窗内容 */
.detail-cover { height: 180px; border-radius: 16px; margin-bottom: 1.5rem; position: relative; overflow: hidden; }
.detail-cat { position: absolute; top: 1rem; left: 1rem; padding: .3rem .8rem; border-radius: 99px; font-size: .75rem; font-weight: 600; color: #fff; background: rgba(0,0,0,.35); backdrop-filter: blur(8px); }
.detail-title { font-size: 1.6rem; font-weight: 700; line-height: 1.3; margin-bottom: .75rem; }
.detail-date { font-size: .82rem; color: var(--text-muted); margin-bottom: 1.5rem; }
.detail-content { white-space: pre-wrap; line-height: 1.8; color: var(--text-dim); }
.detail-link { display: inline-flex; align-items: center; gap: .5rem; margin-top: 1.5rem; padding: .65rem 1.4rem; border-radius: 99px; background: var(--grad); color: #fff; font-weight: 500; font-size: .9rem; transition: transform .25s ease; }
.detail-link:hover { transform: translateY(-2px); }

/* 回到顶部 */
.back-top { position: fixed; bottom: 2rem; right: 2rem; z-index: 90; width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center; font-size: 1.2rem; background: var(--grad); color: #fff; box-shadow: 0 8px 24px rgba(168,85,247,.4); opacity: 0; transform: translateY(20px) scale(.8); pointer-events: none; transition: all .35s cubic-bezier(.4,0,.2,1); }
.back-top.show { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
.back-top:hover { transform: translateY(-4px) scale(1.05); }

/* 滚动入场动画 */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity .6s ease, transform .6s ease; will-change: opacity, transform; }
.reveal.visible { opacity: 1; transform: translateY(0); will-change: auto; }

/* SEO guides grid */
.seo-guides-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1.2rem; }
.seo-guide-card { display: block; padding: 1.35rem; border: 1px solid var(--border); border-radius: 20px; background: var(--surface); transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease; contain: layout style paint; }
.seo-guide-card:hover { transform: translateY(-5px); border-color: var(--border-strong); box-shadow: var(--shadow-lg); }
.seo-guide-card span { display: inline-flex; margin-bottom: .75rem; padding: .2rem .65rem; border-radius: 99px; background: var(--grad); color: #fff; font-size: .72rem; font-weight: 600; }
.seo-guide-card h3 { font-size: 1.05rem; line-height: 1.45; margin-bottom: .55rem; }
.seo-guide-card p { color: var(--text-dim); font-size: .86rem; line-height: 1.7; }

/* SEO text */
.seo-text { padding-top: 2rem; }
.seo-text-content { max-width: 980px; margin: 0 auto; }
.seo-text-content h2 { font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif; font-size: clamp(1.6rem, 3.5vw, 2.2rem); font-weight: 700; letter-spacing: -.02em; margin-bottom: 1rem; }
.seo-text-content p { color: var(--text-dim); font-size: .98rem; line-height: 1.9; margin-bottom: 1rem; }
.seo-text-content a { color: var(--accent); }

/* stats bar */
.stats-bar { display: flex; gap: 2.5rem; justify-content: center; flex-wrap: wrap; max-width: 1200px; margin: 0 auto; padding: 2rem 1.5rem; }
.stat-item { text-align: center; }
.stat-num { display: block; font-family: 'Space Grotesk', sans-serif; font-size: 2rem; font-weight: 700; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { font-size: .82rem; color: var(--text-muted); }

/* about content */
.about-content { max-width: 980px; margin: 0 auto; text-align: center; }
.about-content p { color: var(--text-dim); font-size: .98rem; line-height: 1.9; margin-bottom: 1rem; }

/* breadcrumb */
.breadcrumb { display: flex; align-items: center; gap: .5rem; margin-bottom: 1.5rem; font-size: .85rem; color: var(--text-muted); }
.breadcrumb a { color: var(--text-dim); transition: color .2s; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: var(--text-muted); }

/* form */
.publish-form { display: grid; gap: 1.1rem; }
.form-label { font-size: .82rem; font-weight: 500; color: var(--text-dim); }
.form-input { padding: .7rem .9rem; border-radius: 12px; background: var(--surface); border: 1px solid var(--border); color: var(--text); font-size: .92rem; transition: all .25s ease; }
.form-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(168,85,247,.15); }
.form-textarea { padding: .7rem .9rem; border-radius: 12px; background: var(--surface); border: 1px solid var(--border); color: var(--text); font-size: .92rem; transition: all .25s ease; resize: vertical; min-height: 120px; }
.form-textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(168,85,247,.15); }
.form-select { padding: .7rem .9rem; border-radius: 12px; background: var(--surface); border: 1px solid var(--border); color: var(--text); font-size: .92rem; transition: all .25s ease; }
.form-select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(168,85,247,.15); }
.form-actions { display: flex; gap: .75rem; justify-content: flex-end; margin-top: .5rem; }

/* 响应式 */
@media (max-width: 860px) {
  .nav-links { display: none; }
  .about-card { grid-template-columns: 1fr; gap: 2rem; padding: 2rem; }
  .about-right { order: -1; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .search-box input { width: 100%; }
  .field-row { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .nav-actions .btn-ghost { padding: .5rem .9rem; font-size: .82rem; }
  .articles-grid { grid-template-columns: 1fr; }
  .shortcuts-grid { grid-template-columns: repeat(2, 1fr); }
}