/* ============================================================
   AI 视频工具导航 — 全站唯一样式表（浅色主题 / 无外部请求）
   视觉参考 AI工具宝箱：绿色主色 + 横向工具行 + 彩色分类 chips
   ============================================================ */
:root {
  --bg: #f1f5f9;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --text: #1e293b;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --border-light: #eef2f6;
  --primary: #00a64f;
  --primary-strong: #00853a;
  --primary-light: #00c250;
  --primary-soft: #e8f8ef;
  --primary-grad: linear-gradient(135deg, #00853a 0%, #059669 100%);
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.06), 0 2px 12px rgba(16, 24, 40, 0.05);
  --shadow-hover: 0 8px 24px rgba(0, 166, 79, 0.16);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

img { max-width: 100%; height: auto; }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.3; margin: 0 0 0.5em; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

.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;
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--primary); color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 3px solid rgba(0, 166, 79, 0.45);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ---------- 头部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 16px; height: 60px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 17px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border-radius: 8px;
  background: var(--primary-grad);
  color: #fff; font-size: 12px;
}
.site-nav { margin-left: auto; display: flex; gap: 4px; }
.site-nav a {
  display: inline-block; padding: 8px 14px; min-height: 44px; line-height: 28px;
  color: var(--text-secondary); border-radius: 8px; font-weight: 500;
}
.site-nav a:hover { color: var(--text); background: var(--bg); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--primary); background: var(--primary-soft); }
.nav-toggle {
  display: none; margin-left: auto; flex-direction: column; gap: 5px;
  background: none; border: 1px solid var(--border); border-radius: 8px;
  padding: 10px; cursor: pointer;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--text); border-radius: 2px; }

/* ---------- Hero ---------- */
.hero {
  padding: 52px 0 40px;
  background: linear-gradient(180deg, var(--primary-soft) 0%, rgba(255, 255, 255, 0) 100%);
}
.hero h1 { font-size: clamp(26px, 4vw, 38px); letter-spacing: 0.5px; }
.hero-desc { max-width: 720px; color: var(--text-secondary); font-size: 17px; }
.hero-search { display: flex; align-items: center; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.hero-search input {
  flex: 1; min-width: 260px; max-width: 560px;
  padding: 12px 16px; font-size: 16px; font-family: var(--font);
  border: 1px solid var(--border); border-radius: 10px; background: var(--surface);
}
.hero-search input:focus { border-color: var(--primary); outline: none; box-shadow: 0 0 0 3px rgba(0, 166, 79, 0.15); }
.hero-search-count { color: var(--text-secondary); font-size: 14px; }

/* ---------- 统计条 ---------- */
.stats-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.stat-card {
  flex: 1; min-width: 132px;
  background: var(--surface); border: 1px solid var(--border-light); border-radius: var(--radius);
  padding: 14px 18px; text-align: center; box-shadow: var(--shadow);
}
.stat-card b { display: block; font-size: 24px; font-weight: 800; color: var(--primary); line-height: 1.25; }
.stat-card span { font-size: 13px; color: var(--text-secondary); }

/* ---------- 筛选栏 ---------- */
.tools-filter { display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0 4px; }
.tools-filter-btn {
  padding: 7px 16px; border-radius: var(--radius-pill); cursor: pointer;
  border: 1px solid var(--border); background: var(--surface); color: var(--text-secondary);
  font: inherit; font-size: 14px; font-weight: 600;
}
.tools-filter-btn:hover { border-color: #cbd5e1; color: var(--text); }
.tools-filter-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ---------- 分类快捷 chips ---------- */
.cat-chips { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0 0; }
.cat-chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 14px; border-radius: var(--radius-pill);
  background: var(--surface); border: 1px solid var(--border-light);
  color: var(--text); font-size: 13.5px; font-weight: 600;
  box-shadow: var(--shadow);
}
.cat-chip:hover { text-decoration: none; border-color: #cbd5e1; }
.cat-chip-dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.cat-chip b { color: var(--text-secondary); font-weight: 600; font-size: 12.5px; }

/* ---------- 横向工具行（列表页主形态） ---------- */
.tool-rows {
  list-style: none; margin: 16px 0 0; padding: 0;
  display: grid; gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.tool-rows li { display: flex; }
.tool-row {
  position: relative; display: flex; align-items: center; gap: 12px;
  width: 100%; padding: 12px 14px;
  background: var(--surface); border: 1px solid var(--border-light); border-radius: var(--radius);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.tool-row:hover { border-color: #d7dee8; box-shadow: var(--shadow-hover); }
.tool-row-link { display: flex; align-items: center; gap: 12px; flex: 1; min-width: 0; color: inherit; }
.tool-row-link:hover { text-decoration: none; }
/* 拉伸整行可点，meta 区元素浮在其上 */
.tool-row-link::after { content: ""; position: absolute; inset: 0; border-radius: inherit; }
.tool-row-icon { flex: none; display: flex; align-items: center; }
.tool-row-icon .tool-logo, .tool-row-icon .tool-avatar { width: 44px; height: 44px; border-radius: 11px; font-size: 20px; }
.tool-row-main { min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.tool-row-name {
  display: flex; align-items: center; gap: 6px;
  font-size: 14.5px; font-weight: 700; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.tool-row-desc {
  font-size: 12.5px; color: var(--text-secondary); line-height: 1.5;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.tool-row-meta { position: relative; z-index: 1; display: flex; align-items: center; gap: 8px; flex: none; }
.tool-row-meta .badge { pointer-events: none; }

/* 评分 */
.rating-inline { color: #f59e0b; font-size: 12.5px; font-weight: 700; white-space: nowrap; }

/* 点赞 */
.like-btn {
  display: inline-flex; align-items: center; gap: 3px;
  padding: 4px 9px; border-radius: var(--radius-pill); cursor: pointer;
  border: 1px solid var(--border); background: var(--surface);
  font: inherit; font-size: 12px; color: var(--text-secondary); line-height: 1.4;
}
.like-btn:hover { border-color: var(--primary); color: var(--primary); }
.like-btn b { font-weight: 700; }
.like-btn.liked { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-strong); }

/* 空状态 */
.empty-hint { color: var(--text-secondary); padding: 24px 0; }

/* ---------- 区块 ---------- */
.section { margin: 40px 0; }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.section-head h2 { font-size: 22px; display: flex; align-items: center; gap: 9px; margin: 0; }
.section-dot { width: 11px; height: 11px; border-radius: 50%; flex: none; background: var(--primary); }
.section-desc { color: var(--text-secondary); margin-top: 6px; max-width: 760px; }
.section-more { font-size: 14px; font-weight: 500; white-space: nowrap; }
.cat-badge {
  display: inline-block; padding: 1px 8px; border-radius: var(--radius-pill);
  background: #fff1f0; color: #d4380d; font-size: 11px; font-weight: 700; letter-spacing: 0.5px;
}

/* ---------- 工具卡片（详情页「相关工具」沿用） ---------- */
.tool-grid {
  list-style: none; margin: 16px 0 0; padding: 0;
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
}
.tool-grid-list li { display: flex; }
.tool-card {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.tool-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.tool-card-link { display: block; padding: 18px; color: inherit; height: 100%; }
.tool-card-link:hover { text-decoration: none; }
.tool-card-head { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.tool-card-title { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.tool-card-title h3 { margin: 0; font-size: 17px; }
.tool-card-tagline { margin: 0 0 10px; color: var(--text-secondary); font-size: 14px; }
.tool-card-tags { margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.tool-logo {
  width: 48px; height: 48px; border-radius: 10px; object-fit: contain;
  background: var(--bg); border: 1px solid var(--border); flex: none;
}
.tool-avatar {
  display: inline-flex; align-items: center; justify-content: center;
  width: 48px; height: 48px; border-radius: 10px; flex: none;
  background: linear-gradient(135deg, #d7f5e4, #eafaf1);
  border: 1px solid rgba(16, 24, 40, 0.05);
  color: var(--primary-strong); font-size: 22px; font-weight: 700;
}

/* ---------- 徽标 / chips ---------- */
.badge {
  display: inline-block; padding: 2px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 600; line-height: 20px; white-space: nowrap;
}
.badge-free { background: #e6f7ee; color: #0d7a3f; }
.badge-freemium { background: #fff4e0; color: #a05a00; }
.badge-paid { background: #fdecec; color: #b3261e; }
.badge-trial { background: #e8f0fe; color: #1a56d6; }
.badge-access { background: #f0f2f5; color: var(--text-secondary); font-weight: 500; }
.chip {
  display: inline-block; padding: 2px 10px; border-radius: 999px;
  background: var(--bg); border: 1px solid var(--border);
  font-size: 12px; color: var(--text-secondary);
}

/* ---------- 分类卡片 ---------- */
.cat-grid {
  margin-top: 16px;
  display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(152px, 1fr));
}
.cat-card {
  display: flex; flex-direction: column; gap: 6px;
  padding: 18px 16px; text-align: left;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--text); box-shadow: var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  border-top: 3px solid var(--cat-color, var(--primary));
}
.cat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); text-decoration: none; }
.cat-icon { font-size: 26px; }
.cat-name { font-weight: 700; font-size: 16px; }
.cat-count { font-size: 13px; color: var(--text-secondary); }

/* ---------- 最近更新 ---------- */
.recent-list { list-style: none; margin: 16px 0 0; padding: 0; display: grid; gap: 8px; }
.recent-item {
  display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
  padding: 12px 16px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 10px;
}
.recent-item a { font-weight: 600; }
.recent-tagline { color: var(--text-secondary); font-size: 14px; }

/* ---------- CTA ---------- */
.cta-banner {
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  margin: 48px 0; padding: 28px;
  background: linear-gradient(135deg, var(--primary-soft), #f2fdf7);
  border: 1px solid #c9ecd9; border-radius: 16px;
}
.cta-banner h2 { font-size: 20px; margin-bottom: 4px; }
.cta-banner p { margin: 0; color: var(--text-secondary); }
.cta-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 12px 22px; min-height: 44px; line-height: 20px;
  background: var(--primary); color: #fff; border: none; border-radius: 10px;
  font-weight: 600; font-size: 15px; cursor: pointer;
}
.btn:hover { background: var(--primary-strong); text-decoration: none; }
.btn-visit { font-size: 16px; padding: 12px 26px; }
.btn-ghost {
  background: transparent; color: var(--primary);
  border: 1px solid var(--primary); font-weight: 600;
}
.btn-ghost:hover { background: var(--primary-soft); color: var(--primary-strong); }

/* ---------- 提交工具页 ---------- */
.submit-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 24px 0 12px; }
.submit-hint { color: var(--text-secondary); font-size: 14px; }

/* ---------- 面包屑 / 页头 ---------- */
.breadcrumb { display: flex; gap: 8px; align-items: center; padding: 20px 0 0; color: var(--text-secondary); font-size: 14px; flex-wrap: wrap; }
.page-header { padding: 12px 0 4px; }
.page-header h1 { font-size: clamp(24px, 3.4vw, 32px); display: flex; align-items: center; gap: 10px; }
.page-header p { color: var(--text-secondary); max-width: 760px; }
.page-meta { font-size: 14px; color: var(--text-secondary); margin-top: 4px; }

.cat-siblings { margin: 40px 0; padding-top: 20px; border-top: 1px solid var(--border); }
.cat-siblings h2 { font-size: 17px; }
.cat-siblings p { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; }

/* ---------- 详情页 ---------- */
.tool-detail {
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  box-shadow: var(--shadow); padding: 28px; margin: 16px 0 32px;
}
.tool-detail-head { display: flex; gap: 18px; align-items: flex-start; flex-wrap: wrap; }
.tool-detail-head .tool-logo, .tool-detail-head .tool-avatar { width: 72px; height: 72px; font-size: 34px; border-radius: 14px; }
.tool-detail h1 { font-size: clamp(24px, 3.2vw, 30px); margin-bottom: 2px; }
.tool-detail-tagline { margin: 0 0 10px; color: var(--text-secondary); font-size: 16px; }
.tool-detail-badges { margin: 0 0 16px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.tool-detail-updated { font-size: 13px; color: var(--text-secondary); }
.tool-detail-body p { max-width: 780px; }
.tool-detail-tags { color: var(--text-secondary); font-size: 14px; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }

.tool-facts { border-collapse: collapse; margin-top: 20px; width: 100%; max-width: 560px; font-size: 14px; }
.tool-facts th, .tool-facts td { border-bottom: 1px solid var(--border); padding: 10px 12px; text-align: left; vertical-align: top; }
.tool-facts th { color: var(--text-secondary); font-weight: 500; width: 96px; white-space: nowrap; }
.tool-facts tr:last-child th, .tool-facts tr:last-child td { border-bottom: none; }

/* ---------- 静态页 ---------- */
.static-page { max-width: 780px; padding: 24px 0 48px; }
.static-page h1 { font-size: clamp(24px, 3.4vw, 32px); margin-top: 16px; }
.static-page h2 { font-size: 20px; margin-top: 32px; }
.static-page p, .static-page li { color: var(--text); }

/* ---------- 404 ---------- */
.notfound { text-align: center; padding: 80px 0; }
.notfound-code { font-size: 64px; font-weight: 800; color: var(--primary); margin: 0; }
.notfound h1 { font-size: 26px; }
.notfound p { color: var(--text-secondary); max-width: 480px; margin: 0 auto 16px; }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--border); background: var(--surface); margin-top: 40px; }
.footer-inner { padding: 32px 20px; display: grid; gap: 12px; }
.footer-brand { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { color: var(--text-secondary); font-size: 14px; }
.footer-links a:hover { color: var(--primary); }
.footer-note { margin: 0; color: var(--text-secondary); font-size: 13px; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .tool-rows { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .site-nav {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    flex-direction: column; gap: 0; padding: 8px;
    background: var(--surface); border-bottom: 1px solid var(--border);
  }
  .site-nav.nav-open { display: flex; }
  .site-nav a { padding: 12px 16px; }
  .hero { padding: 36px 0 28px; }
  .tool-detail { padding: 20px; }
  .cta-banner { padding: 22px; }
  .section { margin: 32px 0; }
  .stat-card { min-width: 44%; }
  .tool-row-desc { -webkit-line-clamp: 2; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}