/* ========== 91网 全站共享样式 ========== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #1a2b4a;
  --color-primary-light: #2a3f63;
  --color-primary-dark: #0f1c33;
  --color-accent: #ff6b35;
  --color-accent-light: #ff8a5f;
  --color-accent-dark: #e85420;
  --color-bg: #f4f6f9;
  --color-card: #ffffff;
  --color-text: #2b3a4f;
  --color-text-light: #6b7a8f;
  --color-border: #e1e6ee;
  --color-success: #2bb673;
  --color-tag-bg: #eef2f8;
  --shadow-sm: 0 1px 3px rgba(26, 43, 74, 0.08);
  --shadow-md: 0 4px 16px rgba(26, 43, 74, 0.10);
  --shadow-lg: 0 10px 30px rgba(26, 43, 74, 0.14);
  --radius: 10px;
  --radius-lg: 16px;
  --nav-height: 64px;
  --max-width: 1200px;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background-color: var(--color-bg);
  background-image:
    linear-gradient(rgba(26, 43, 74, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 43, 74, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--color-text);
  line-height: 1.65;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--color-accent); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
h1, h2, h3, h4 { color: var(--color-primary); font-weight: 700; line-height: 1.3; }

.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

.site-header {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-height);
  background: rgba(26, 43, 74, 0.96);
  backdrop-filter: saturate(180%) blur(8px); -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08); z-index: 1000;
}
.nav { display: flex; align-items: center; height: var(--nav-height); gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; font-size: 20px; font-weight: 800; letter-spacing: 0.5px; white-space: nowrap; }
.brand-logo { width: 32px; height: 32px; flex-shrink: 0; }
.brand-text { background: linear-gradient(90deg, #fff 30%, var(--color-accent) 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-menu a { display: block; padding: 8px 14px; color: rgba(255, 255, 255, 0.82); font-size: 14px; font-weight: 500; border-radius: 6px; transition: background 0.2s ease, color 0.2s ease; }
.nav-menu a:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }
.nav-menu a.active { color: #fff; background: var(--color-accent); }
.nav-search { margin-left: auto; display: flex; align-items: center; background: rgba(255, 255, 255, 0.1); border-radius: 20px; padding: 6px 14px; width: 220px; transition: background 0.2s ease, width 0.2s ease; }
.nav-search:focus-within { background: rgba(255, 255, 255, 0.18); width: 260px; }
.nav-search svg { width: 16px; height: 16px; color: rgba(255, 255, 255, 0.7); flex-shrink: 0; }
.nav-search input { flex: 1; border: none; background: transparent; color: #fff; font-size: 13px; margin-left: 8px; outline: none; }
.nav-search input::placeholder { color: rgba(255, 255, 255, 0.55); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; margin-left: auto; }
.nav-toggle svg { width: 26px; height: 26px; color: #fff; }

.main { padding-top: var(--nav-height); min-height: 80vh; }
.section { padding: 56px 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 28px; gap: 16px; flex-wrap: wrap; }
.section-title { font-size: 26px; font-weight: 800; display: flex; align-items: center; gap: 10px; }
.section-title::before { content: ""; display: inline-block; width: 4px; height: 24px; background: var(--color-accent); border-radius: 2px; }
.section-subtitle { color: var(--color-text-light); font-size: 14px; }
.more-link { color: var(--color-accent); font-size: 14px; font-weight: 600; }
.more-link:hover { color: var(--color-accent-dark); }

.hero { position: relative; background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 55%, var(--color-primary-light) 100%); color: #fff; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px); background-size: 40px 40px; mask-image: radial-gradient(ellipse 80% 60% at 70% 40%, #000 30%, transparent 75%); -webkit-mask-image: radial-gradient(ellipse 80% 60% at 70% 40%, #000 30%, transparent 75%); }
.hero::after { content: ""; position: absolute; right: -120px; top: -120px; width: 420px; height: 420px; background: radial-gradient(circle, rgba(255, 107, 53, 0.35) 0%, transparent 70%); border-radius: 50%; }
.hero-inner { position: relative; z-index: 1; padding: 80px 0 70px; max-width: 760px; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(255, 107, 53, 0.18); border: 1px solid rgba(255, 107, 53, 0.4); color: var(--color-accent-light); padding: 5px 14px; border-radius: 20px; font-size: 12px; font-weight: 600; margin-bottom: 20px; }
.hero h1 { color: #fff; font-size: 42px; line-height: 1.2; font-weight: 800; margin-bottom: 18px; letter-spacing: -0.5px; }
.hero h1 .hl { color: var(--color-accent); }
.hero p { font-size: 17px; color: rgba(255, 255, 255, 0.82); margin-bottom: 30px; max-width: 620px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 26px; border-radius: 8px; font-size: 15px; font-weight: 600; cursor: pointer; border: none; transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease; }
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--color-accent); color: #fff; box-shadow: 0 6px 18px rgba(255, 107, 53, 0.35); }
.btn-primary:hover { background: var(--color-accent-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 22px rgba(255, 107, 53, 0.45); }
.btn-ghost { background: rgba(255, 255, 255, 0.1); color: #fff; border: 1px solid rgba(255, 255, 255, 0.25); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.2); color: #fff; }
.btn-outline { background: transparent; color: var(--color-primary); border: 1px solid var(--color-border); }
.btn-outline:hover { border-color: var(--color-accent); color: var(--color-accent); background: var(--color-card); }

.stats-bar { background: var(--color-card); border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow-sm); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); padding: 28px 0; text-align: center; }
.stat-item { position: relative; padding: 0 16px; }
.stat-item:not(:last-child)::after { content: ""; position: absolute; right: 0; top: 50%; transform: translateY(-50%); height: 36px; width: 1px; background: var(--color-border); }
.stat-num { font-size: 30px; font-weight: 800; color: var(--color-primary); line-height: 1; }
.stat-num .unit { font-size: 16px; color: var(--color-accent); margin-left: 2px; }
.stat-label { margin-top: 8px; font-size: 13px; color: var(--color-text-light); }

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 24px; transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease; display: flex; flex-direction: column; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.card-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, rgba(255, 107, 53, 0.12), rgba(26, 43, 74, 0.08)); color: var(--color-accent); margin-bottom: 16px; }
.card-icon svg { width: 24px; height: 24px; }
.card-title { font-size: 18px; margin-bottom: 8px; color: var(--color-primary); }
.card-desc { color: var(--color-text-light); font-size: 14px; flex: 1; }
.card-foot { margin-top: 16px; display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: var(--color-text-light); }

.news-card { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; transition: transform 0.2s ease, box-shadow 0.2s ease; display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.news-thumb { height: 160px; background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%); position: relative; display: flex; align-items: center; justify-content: center; color: rgba(255, 255, 255, 0.9); }
.news-thumb.alt-1 { background: linear-gradient(135deg, #1a2b4a, #ff6b35); }
.news-thumb.alt-2 { background: linear-gradient(135deg, #2a3f63, #4a6fa5); }
.news-thumb.alt-3 { background: linear-gradient(135deg, #0f1c33, #2bb673); }
.news-thumb.alt-4 { background: linear-gradient(135deg, #1a2b4a, #6b7a8f); }
.news-thumb.alt-5 { background: linear-gradient(135deg, #e85420, #1a2b4a); }
.news-thumb svg { width: 56px; height: 56px; opacity: 0.85; }
.news-tag { position: absolute; top: 12px; left: 12px; background: var(--color-accent); color: #fff; font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 4px; }
.news-body { padding: 18px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.news-title { font-size: 17px; font-weight: 700; color: var(--color-primary); margin-bottom: 10px; line-height: 1.4; }
.news-excerpt { color: var(--color-text-light); font-size: 14px; flex: 1; margin-bottom: 14px; }
.news-meta { display: flex; align-items: center; gap: 14px; font-size: 12px; color: var(--color-text-light); border-top: 1px solid var(--color-border); padding-top: 12px; }
.news-meta span { display: inline-flex; align-items: center; gap: 4px; }
.news-meta svg { width: 13px; height: 13px; }

.tag { display: inline-block; background: var(--color-tag-bg); color: var(--color-primary); font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 4px; margin-right: 6px; margin-bottom: 6px; transition: background 0.2s ease, color 0.2s ease; }
.tag:hover { background: var(--color-accent); color: #fff; }
.tag-accent { background: rgba(255, 107, 53, 0.12); color: var(--color-accent); }

.list-card { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; }
.list-item { display: flex; align-items: flex-start; gap: 18px; padding: 22px 24px; border-bottom: 1px solid var(--color-border); transition: background 0.2s ease; }
.list-item:last-child { border-bottom: none; }
.list-item:hover { background: var(--color-bg); }
.list-rank { flex-shrink: 0; width: 32px; height: 32px; border-radius: 8px; background: var(--color-tag-bg); color: var(--color-text-light); font-weight: 700; font-size: 14px; display: flex; align-items: center; justify-content: center; }
.list-rank.top { background: var(--color-accent); color: #fff; }
.list-content { flex: 1; min-width: 0; }
.list-title { font-size: 16px; font-weight: 700; color: var(--color-primary); margin-bottom: 6px; }
.list-desc { color: var(--color-text-light); font-size: 13px; margin-bottom: 8px; }
.list-meta { display: flex; align-items: center; gap: 16px; font-size: 12px; color: var(--color-text-light); flex-wrap: wrap; }
.list-meta span { display: inline-flex; align-items: center; gap: 4px; }
.list-meta svg { width: 13px; height: 13px; }

.forum-card { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 24px; display: flex; gap: 18px; align-items: flex-start; transition: transform 0.2s ease, box-shadow 0.2s ease; }
.forum-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.forum-avatar { width: 56px; height: 56px; border-radius: 14px; background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); display: flex; align-items: center; justify-content: center; color: #fff; flex-shrink: 0; }
.forum-avatar svg { width: 28px; height: 28px; }
.forum-info { flex: 1; }
.forum-name { font-size: 17px; font-weight: 700; color: var(--color-primary); margin-bottom: 6px; }
.forum-desc { color: var(--color-text-light); font-size: 13px; margin-bottom: 12px; }
.forum-stats { display: flex; gap: 20px; font-size: 12px; color: var(--color-text-light); }
.forum-stats b { color: var(--color-primary); font-size: 14px; font-weight: 700; }

.page-banner { background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%); color: #fff; padding: 56px 0 48px; position: relative; overflow: hidden; }
.page-banner::after { content: ""; position: absolute; right: -80px; bottom: -80px; width: 280px; height: 280px; background: radial-gradient(circle, rgba(255, 107, 53, 0.25) 0%, transparent 70%); border-radius: 50%; }
.page-banner h1 { color: #fff; font-size: 32px; margin-bottom: 12px; position: relative; }
.page-banner p { color: rgba(255, 255, 255, 0.8); font-size: 15px; max-width: 640px; position: relative; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(255, 255, 255, 0.6); margin-bottom: 18px; position: relative; }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb svg { width: 13px; height: 13px; }

.filter-bar { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 14px 20px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 28px; }
.filter-label { font-size: 13px; color: var(--color-text-light); font-weight: 600; margin-right: 4px; }
.filter-btn { padding: 6px 14px; border-radius: 20px; background: var(--color-bg); color: var(--color-text); font-size: 13px; font-weight: 500; cursor: pointer; border: 1px solid transparent; transition: all 0.2s ease; }
.filter-btn:hover { color: var(--color-accent); border-color: var(--color-accent); }
.filter-btn.active { background: var(--color-primary); color: #fff; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { display: flex; flex-direction: column; }
.form-group.full { grid-column: 1 / -1; }
.form-label { font-size: 14px; font-weight: 600; color: var(--color-primary); margin-bottom: 8px; }
.form-input, .form-textarea, .form-select { border: 1px solid var(--color-border); border-radius: 8px; padding: 12px 14px; font-size: 14px; font-family: inherit; color: var(--color-text); background: var(--color-bg); transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease; outline: none; }
.form-input:focus, .form-textarea:focus, .form-select:focus { border-color: var(--color-accent); background: #fff; box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.12); }
.form-textarea { resize: vertical; min-height: 130px; }
.form-help { font-size: 12px; color: var(--color-text-light); margin-top: 6px; }

.faq-item { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; }
.faq-q { display: flex; align-items: center; justify-content: space-between; padding: 18px 22px; cursor: pointer; font-weight: 600; color: var(--color-primary); font-size: 15px; user-select: none; }
.faq-q:hover { background: var(--color-bg); }
.faq-q .faq-icon { width: 20px; height: 20px; color: var(--color-accent); transition: transform 0.25s ease; flex-shrink: 0; }
.faq-item.open .faq-q .faq-icon { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease, padding 0.3s ease; padding: 0 22px; color: var(--color-text-light); font-size: 14px; }
.faq-item.open .faq-a { max-height: 400px; padding: 0 22px 20px; }

.team-card { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 30px 24px; text-align: center; transition: transform 0.2s ease, box-shadow 0.2s ease; }
.team-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.team-avatar { width: 88px; height: 88px; border-radius: 50%; margin: 0 auto 16px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 30px; font-weight: 800; }
.team-name { font-size: 18px; font-weight: 700; color: var(--color-primary); margin-bottom: 4px; }
.team-role { color: var(--color-accent); font-size: 13px; font-weight: 600; margin-bottom: 12px; }
.team-bio { color: var(--color-text-light); font-size: 13px; }

.contact-info { display: flex; flex-direction: column; gap: 18px; }
.contact-item { display: flex; gap: 14px; align-items: flex-start; }
.contact-ic { width: 44px; height: 44px; border-radius: 12px; background: linear-gradient(135deg, rgba(255, 107, 53, 0.12), rgba(26, 43, 74, 0.08)); color: var(--color-accent); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.contact-ic svg { width: 22px; height: 22px; }
.contact-label { font-size: 12px; color: var(--color-text-light); margin-bottom: 2px; }
.contact-value { font-size: 15px; font-weight: 600; color: var(--color-primary); }

.map-placeholder { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%); border-radius: var(--radius-lg); height: 280px; display: flex; flex-direction: column; align-items: center; justify-content: center; color: rgba(255, 255, 255, 0.85); position: relative; overflow: hidden; }
.map-placeholder::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px); background-size: 32px 32px; }
.map-placeholder svg { width: 48px; height: 48px; margin-bottom: 12px; color: var(--color-accent); position: relative; }
.map-placeholder span { position: relative; font-size: 14px; }

.tool-card { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 24px; text-align: center; transition: transform 0.2s ease, box-shadow 0.2s ease; cursor: pointer; }
.tool-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-accent); }
.tool-ic { width: 56px; height: 56px; border-radius: 16px; margin: 0 auto 14px; display: flex; align-items: center; justify-content: center; color: #fff; }
.tool-ic svg { width: 28px; height: 28px; }
.tool-ic.c1 { background: linear-gradient(135deg, #ff6b35, #ff8a5f); }
.tool-ic.c2 { background: linear-gradient(135deg, #1a2b4a, #2a3f63); }
.tool-ic.c3 { background: linear-gradient(135deg, #2bb673, #4dd198); }
.tool-ic.c4 { background: linear-gradient(135deg, #4a6fa5, #6b8fc4); }
.tool-ic.c5 { background: linear-gradient(135deg, #e85420, #ff6b35); }
.tool-ic.c6 { background: linear-gradient(135deg, #6b7a8f, #8a9bb0); }
.tool-name { font-size: 16px; font-weight: 700; color: var(--color-primary); margin-bottom: 6px; }
.tool-desc { color: var(--color-text-light); font-size: 13px; margin-bottom: 12px; }
.tool-foot { font-size: 12px; color: var(--color-accent); font-weight: 600; }

.timeline { position: relative; padding-left: 32px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 4px; bottom: 4px; width: 2px; background: var(--color-border); }
.timeline-item { position: relative; padding-bottom: 28px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot { position: absolute; left: -32px; top: 2px; width: 18px; height: 18px; border-radius: 50%; background: var(--color-accent); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--color-accent); }
.timeline-year { font-size: 14px; font-weight: 800; color: var(--color-accent); margin-bottom: 4px; }
.timeline-title { font-size: 16px; font-weight: 700; color: var(--color-primary); margin-bottom: 4px; }
.timeline-desc { color: var(--color-text-light); font-size: 14px; }

.value-card { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 28px; transition: transform 0.2s ease, box-shadow 0.2s ease; }
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.value-num { font-size: 13px; font-weight: 800; color: var(--color-accent); letter-spacing: 1px; margin-bottom: 10px; }
.value-card h3 { font-size: 18px; margin-bottom: 10px; }
.value-card p { color: var(--color-text-light); font-size: 14px; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.step-card { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 28px; position: relative; }
.step-num { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 12px; background: var(--color-primary); color: #fff; font-weight: 800; font-size: 16px; margin-bottom: 16px; }
.step-card h3 { font-size: 17px; margin-bottom: 8px; }
.step-card p { color: var(--color-text-light); font-size: 14px; }

.cta { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%); border-radius: var(--radius-lg); padding: 48px; color: #fff; text-align: center; position: relative; overflow: hidden; }
.cta::after { content: ""; position: absolute; left: -60px; top: -60px; width: 220px; height: 220px; background: radial-gradient(circle, rgba(255, 107, 53, 0.3) 0%, transparent 70%); border-radius: 50%; }
.cta h2 { color: #fff; font-size: 26px; margin-bottom: 12px; position: relative; }
.cta p { color: rgba(255, 255, 255, 0.82); margin-bottom: 24px; position: relative; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta .hero-actions { justify-content: center; position: relative; }

.two-col { display: grid; grid-template-columns: 1.6fr 1fr; gap: 28px; align-items: start; }
.sidebar { display: flex; flex-direction: column; gap: 22px; position: sticky; top: calc(var(--nav-height) + 20px); }
.sidebar-card { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 22px; }
.sidebar-card h3 { font-size: 16px; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.sidebar-card h3 svg { width: 18px; height: 18px; color: var(--color-accent); }
.rank-item { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--color-border); }
.rank-item:last-child { border-bottom: none; }
.rank-num { width: 22px; height: 22px; flex-shrink: 0; border-radius: 6px; background: var(--color-tag-bg); color: var(--color-text-light); font-size: 12px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.rank-item:nth-child(1) .rank-num, .rank-item:nth-child(2) .rank-num, .rank-item:nth-child(3) .rank-num { background: var(--color-accent); color: #fff; }
.rank-title { font-size: 13px; color: var(--color-text); line-height: 1.4; }
.rank-hot { font-size: 11px; color: var(--color-text-light); margin-top: 2px; }

.site-footer { background: var(--color-primary-dark); color: rgba(255, 255, 255, 0.7); padding: 56px 0 24px; margin-top: 60px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-size: 20px; font-weight: 800; margin-bottom: 14px; }
.footer-brand svg { width: 32px; height: 32px; }
.footer-about { font-size: 13px; line-height: 1.7; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 13px; color: rgba(255, 255, 255, 0.65); }
.footer-col ul li a:hover { color: var(--color-accent); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 22px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 12px; color: rgba(255, 255, 255, 0.5); }
.footer-bottom a:hover { color: var(--color-accent); }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }

.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.lead { font-size: 16px; color: var(--color-text-light); max-width: 760px; }
.divider { height: 1px; background: var(--color-border); border: none; margin: 32px 0; }

@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .steps { grid-template-columns: 1fr; }
  .hero h1 { font-size: 34px; }
}

@media (max-width: 768px) {
  .nav-menu { position: fixed; top: var(--nav-height); left: 0; right: 0; background: var(--color-primary); flex-direction: column; align-items: stretch; padding: 12px 16px; gap: 2px; transform: translateY(-150%); transition: transform 0.3s ease; border-bottom: 1px solid rgba(255, 255, 255, 0.08); max-height: calc(100vh - var(--nav-height)); overflow-y: auto; }
  .nav-menu.open { transform: translateY(0); }
  .nav-menu a { padding: 12px 14px; font-size: 15px; border-radius: 8px; }
  .nav-search { display: none; }
  .nav-toggle { display: inline-flex; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px 0; }
  .stat-item:nth-child(2)::after { display: none; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .hero-inner { padding: 56px 0 48px; }
  .hero h1 { font-size: 28px; }
  .hero p { font-size: 15px; }
  .page-banner { padding: 40px 0 36px; }
  .page-banner h1 { font-size: 26px; }
  .section { padding: 40px 0; }
  .section-title { font-size: 22px; }
  .section-head { flex-direction: column; align-items: flex-start; }
  .cta { padding: 32px 24px; }
  .cta h2 { font-size: 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .list-item { flex-direction: column; gap: 10px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 24px; }
  .btn { padding: 11px 20px; font-size: 14px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}