:root {
  --primary: #16a34a;
  --accent: #84cc16;
  --bg: #f7fee7;
  --text: #1a2e05;
  --border-w: 3px;
  --shadow: 6px 6px 0px rgba(26, 46, 5, 0.15);
}
* { border-radius: 0 !important; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  background-image: radial-gradient(circle, rgba(22, 163, 74, 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
  font-size: 1.05rem;
  line-height: 1.7;
  overflow-x: hidden;
}
h1, h2, h3, h4, h5 { font-weight: 800; letter-spacing: -0.02em; }
a { text-decoration: none; color: inherit; }

/* 导航 */
.navbar-buka {
  background: var(--bg);
  border-bottom: var(--border-w) solid var(--text);
  padding: 0.75rem 0;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.navbar-buka .navbar-brand {
  font-weight: 900;
  font-size: 1.8rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.navbar-buka .navbar-brand i { color: var(--primary); font-size: 2rem; }
.navbar-buka .nav-link {
  font-weight: 600;
  color: var(--text);
  padding: 0.5rem 1rem !important;
  transition: all 0.2s;
}
.navbar-buka .nav-link:hover {
  background: var(--primary);
  color: #fff;
}
.navbar-toggler {
  border: 2px solid var(--text) !important;
  box-shadow: none !important;
}

/* Hero 关键词云 */
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px 24px;
  padding: 40px 0 10px;
}
.hero-tags .tag {
  font-size: 1.4rem;
  font-weight: 700;
  padding: 8px 18px;
  border: var(--border-w) solid var(--text);
  background: #fff;
  box-shadow: 4px 4px 0 var(--text);
  animation: floatTag 3s ease-in-out infinite;
  display: inline-block;
  white-space: nowrap;
}
.hero-tags .tag:nth-child(1) { animation-delay: 0s; }
.hero-tags .tag:nth-child(2) { animation-delay: 0.2s; }
.hero-tags .tag:nth-child(3) { animation-delay: 0.4s; }
.hero-tags .tag:nth-child(4) { animation-delay: 0.6s; }
.hero-tags .tag:nth-child(5) { animation-delay: 0.8s; }
.hero-tags .tag:nth-child(6) { animation-delay: 1s; }
.hero-tags .tag:nth-child(7) { animation-delay: 1.2s; }
.hero-tags .tag:nth-child(8) { animation-delay: 1.4s; }
@keyframes floatTag {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* 区块通用 */
.section-buka { padding: 70px 0; }
.section-title {
  font-size: 2.6rem;
  font-weight: 900;
  margin-bottom: 40px;
  position: relative;
  display: inline-block;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 60%;
  height: 6px;
  background: var(--primary);
}

/* 特色卡片 */
.feature-card {
  background: #fff;
  border: var(--border-w) solid var(--text);
  box-shadow: var(--shadow);
  padding: 30px 24px;
  transition: all 0.3s ease;
  height: 100%;
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 10px 12px 0 rgba(22, 163, 74, 0.25);
}
.feature-card .icon-wrap {
  width: 70px;
  height: 70px;
  border: 3px solid var(--text);
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 18px;
  box-shadow: 4px 4px 0 var(--text);
}
.feature-card h5 { font-weight: 800; font-size: 1.3rem; margin-bottom: 12px; }
.feature-card p { color: #3f4a2e; margin: 0; }

/* 对比表格 */
.table-buka {
  border: var(--border-w) solid var(--text);
  box-shadow: var(--shadow);
  background: #fff;
  width: 100%;
}
.table-buka th, .table-buka td {
  border: 2px solid var(--text);
  padding: 18px 20px;
  text-align: center;
  font-size: 1.05rem;
}
.table-buka thead th {
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
  text-transform: uppercase;
}
.table-buka tbody tr:nth-child(even) { background: #f3fee7; }
.table-buka .highlight-col { background: var(--accent) !important; font-weight: 700; }
.table-buka .check-icon { color: var(--primary); font-size: 1.5rem; font-weight: 900; }
.table-buka .cross-icon { color: #dc2626; font-size: 1.5rem; }

/* FAQ 手风琴 */
.accordion-buka {
  border: var(--border-w) solid var(--text);
  box-shadow: var(--shadow);
  background: #fff;
}
.accordion-item-buka {
  border-bottom: 2px solid var(--text);
  background: transparent;
}
.accordion-item-buka:last-child { border-bottom: none; }
.accordion-button-buka {
  width: 100%;
  padding: 20px 24px;
  background: #fff;
  border: none;
  text-align: left;
  font-size: 1.15rem;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.2s;
}
.accordion-button-buka:hover { background: var(--bg); }
.accordion-button-buka i { color: var(--primary); font-size: 1.3rem; transition: transform 0.3s; }
.accordion-button-buka.active { background: var(--primary); color: #fff; }
.accordion-button-buka.active i { color: #fff; transform: rotate(45deg); }
.accordion-content-buka {
  padding: 0 24px 20px;
  background: var(--bg);
  font-size: 1rem;
  border-top: 2px solid var(--text);
}

/* 数字滚动 */
.stat-number {
  font-size: 3rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1.2;
}
.stat-label { font-weight: 600; color: #3f4a2e; }

/* 介绍区块 */
.about-block {
  background: #fff;
  border: var(--border-w) solid var(--text);
  box-shadow: var(--shadow);
  padding: 40px;
}
.about-block h3 { font-size: 1.8rem; margin-bottom: 20px; }
.about-block p { margin-bottom: 15px; }

/* CTA */
.cta-section {
  background: var(--primary);
  border: var(--border-w) solid var(--text);
  padding: 60px 0;
  box-shadow: inset 0 0 0 4px var(--bg);
}
.cta-btn {
  display: inline-block;
  background: var(--text);
  color: #fff;
  font-size: 1.3rem;
  font-weight: 800;
  padding: 16px 40px;
  border: 3px solid #fff;
  box-shadow: 6px 6px 0 rgba(0,0,0,0.2);
  transition: all 0.2s;
  text-transform: uppercase;
}
.cta-btn:hover { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 rgba(0,0,0,0.3); color: #fff; }

/* 页脚 */
.footer-buka {
  background: var(--text);
  color: var(--bg);
  padding: 50px 0 30px;
  border-top: 6px solid var(--primary);
}
.footer-buka a { color: var(--bg); opacity: 0.85; }
.footer-buka a:hover { opacity: 1; color: var(--accent); }
.friend-links {
  border-top: 2px solid rgba(247, 254, 231, 0.3);
  margin-top: 30px;
  padding-top: 30px;
}

/* 回到顶部 */
#backTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 55px;
  height: 55px;
  background: var(--primary);
  color: #fff;
  border: 3px solid var(--text);
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 4px 4px 0 var(--text);
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}
#backTop.show { opacity: 1; visibility: visible; }
#backTop:hover { background: var(--accent); }

@media (max-width: 768px) {
  .section-title { font-size: 2rem; }
  .hero-tags .tag { font-size: 1rem; }
  .table-buka th, .table-buka td { padding: 10px 8px; font-size: 0.9rem; }
}

/* --- 子页面追加 --- */
.ranking-hero {
            background: var(--bg);
            padding: 60px 0 40px;
            border-bottom: var(--border-w) solid var(--text);
        }
.ranking-tabs {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 30px;
        }
.ranking-tab-btn {
            padding: 10px 24px;
            border: var(--border-w) solid var(--text);
            background: #fff;
            color: var(--text);
            font-weight: 700;
            font-size: 15px;
            cursor: pointer;
            transition: all 0.2s ease;
            box-shadow: 4px 4px 0px rgba(26, 46, 5, 0.15);
        }
.ranking-tab-btn:hover {
            transform: translate(-2px, -2px);
            box-shadow: 6px 6px 0px rgba(26, 46, 5, 0.15);
        }
.ranking-tab-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--text);
        }
.rank-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
.rank-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px;
            margin-bottom: 16px;
            background: #fff;
            border: var(--border-w) solid var(--text);
            box-shadow: var(--shadow);
            transition: transform 0.2s ease;
        }
.rank-item:hover {
            transform: translate(-2px, -2px);
        }
.rank-number {
            font-size: 42px;
            font-weight: 900;
            color: var(--primary);
            min-width: 60px;
            text-align: center;
            line-height: 1;
            font-style: italic;
        }
.rank-item:nth-child(1) .rank-number,
        .rank-item:nth-child(2) .rank-number,
        .rank-item:nth-child(3) .rank-number {
            color: var(--accent);
            font-size: 52px;
        }
.rank-cover {
            width: 80px;
            height: 110px;
            background: var(--primary);
            border: 2px solid var(--text);
            box-shadow: 4px 4px 0px rgba(26, 46, 5, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            color: #fff;
            flex-shrink: 0;
        }
.rank-info {
            flex: 1;
        }
.rank-title {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 6px;
        }
.rank-meta {
            font-size: 14px;
            color: rgba(26, 46, 5, 0.7);
            margin-bottom: 8px;
        }
.rank-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
.rank-tag {
            background: var(--bg);
            border: 2px solid var(--text);
            padding: 2px 10px;
            font-size: 12px;
            font-weight: 600;
            color: var(--text);
        }
.rank-stats {
            display: flex;
            gap: 20px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            flex-shrink: 0;
        }
.rank-stat {
            display: flex;
            align-items: center;
            gap: 6px;
        }
.rank-stat i {
            color: var(--primary);
        }
.rank-badge {
            background: var(--accent);
            color: var(--text);
            padding: 4px 12px;
            font-weight: 800;
            font-size: 13px;
            border: 2px solid var(--text);
            display: inline-block;
            margin-bottom: 8px;
        }
.section-subtitle {
            font-size: 16px;
            color: rgba(26, 46, 5, 0.7);
            margin-bottom: 30px;
            font-weight: 400;
        }
.rank-item {
                flex-wrap: wrap;
                gap: 12px;
            }
.rank-stats {
                width: 100%;
                gap: 12px;
                justify-content: flex-start;
            }
.rank-number {
                font-size: 32px;
                min-width: 40px;
            }
.rank-cover {
                width: 60px;
                height: 85px;
                font-size: 24px;
            }
.rank-title {
                font-size: 17px;
            }

/* --- 子页面追加 --- */
/* 本页专属样式 */
        .guide-hero {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff;
            padding: 4rem 0;
            margin-bottom: 3rem;
            position: relative;
            overflow: hidden;
        }
.guide-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
        }
.guide-hero h1 {
            font-weight: 900;
            font-size: 2.8rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 0 rgba(0,0,0,0.2);
        }
.guide-hero p {
            font-size: 1.2rem;
            opacity: 0.95;
            max-width: 700px;
        }
.guide-section {
            margin-bottom: 4rem;
        }
.guide-card {
            background: #fff;
            border: var(--border-w) solid var(--text);
            border-radius: 12px;
            padding: 2rem;
            box-shadow: var(--shadow);
            height: 100%;
            transition: transform 0.2s ease;
        }
.guide-card:hover {
            transform: translateY(-4px);
        }
.guide-card h3 {
            color: var(--primary);
            font-weight: 800;
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }
.guide-card i {
            color: var(--accent);
            margin-right: 0.5rem;
        }
.step-list {
            list-style: none;
            padding: 0;
            counter-reset: step-counter;
        }
.step-list li {
            counter-increment: step-counter;
            padding: 0.75rem 0 0.75rem 3rem;
            position: relative;
            border-bottom: 1px dashed rgba(26,46,5,0.1);
        }
.step-list li::before {
            content: counter(step-counter);
            position: absolute;
            left: 0;
            top: 0.75rem;
            width: 2rem;
            height: 2rem;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
        }
.tip-box {
            background: var(--bg);
            border-left: 5px solid var(--accent);
            padding: 1rem 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
.tip-box p {
            margin: 0;
            color: var(--text);
        }
.shortcut-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
.shortcut-item {
            background: var(--bg);
            border: 2px solid var(--text);
            border-radius: 8px;
            padding: 1rem;
            text-align: center;
            font-weight: 600;
            transition: all 0.2s;
        }
.shortcut-item:hover {
            background: var(--accent);
            color: #fff;
            transform: scale(1.03);
        }
.shortcut-item .key {
            display: inline-block;
            background: var(--text);
            color: #fff;
            padding: 0.25rem 0.75rem;
            border-radius: 4px;
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
        }
.guide-hero h1 {
                font-size: 2rem;
            }
.guide-hero p {
                font-size: 1rem;
            }
.guide-card {
                padding: 1.5rem;
            }

/* --- 子页面追加 --- */
/* 本页专属微调：确保Bootstrap组件不破坏整体风格 (覆盖 .card等) */
        .card, .card-body, .card-header, .card-footer {
            background: var(--bg, #f7fee7);
            color: var(--text, #1a2e05);
            border: 3px solid var(--text, #1a2e05);
            border-radius: 0;
            box-shadow: var(--shadow, 6px 6px 0px rgba(26, 46, 5, 0.15));
        }
.card-title, .card-text {
            color: var(--text, #1a2e05);
        }
.list-group-item {
            background: var(--bg, #f7fee7);
            color: var(--text, #1a2e05);
            border-color: var(--text, #1a2e05);
        }
.form-control, .form-select {
            background: rgba(255, 255, 255, 0.7);
            border: 2px solid var(--text, #1a2e05);
            color: var(--text, #1a2e05);
            border-radius: 0;
        }
.form-control::placeholder {
            color: rgba(26, 46, 5, 0.6);
        }
.accordion-button, .accordion-item {
            background: var(--bg, #f7fee7);
            color: var(--text, #1a2e05);
            border: 2px solid var(--text, #1a2e05);
        }
.accordion-button:not(.collapsed) {
            background: var(--primary, #16a34a);
            color: #fff;
        }
.accordion-body {
            background: var(--bg, #f7fee7);
            color: var(--text, #1a2e05);
        }
/* 确保导航栏品牌完整连续 */
        .navbar-brand i {
            margin-right: 6px;
        }
/* 页面内小标题统一加粗带感 */
        .section-title {
            font-weight: 800;
            letter-spacing: -0.01em;
        }
/* 本页自定义块 */
        .about-block {
            background: var(--bg, #f7fee7);
            border-left: 8px solid var(--primary, #16a34a);
            padding: 1.8rem 1.5rem;
            margin-bottom: 2rem;
            box-shadow: var(--shadow, 6px 6px 0px rgba(26, 46, 5, 0.15));
        }
.friend-links a {
            color: var(--text, #1a2e05);
            text-decoration: underline dotted;
            margin-right: 15px;
        }
/* 高亮当前页导航 */
        .navbar .nav-link.active {
            font-weight: 700;
            text-decoration: underline;
            text-underline-offset: 6px;
            text-decoration-color: var(--accent, #84cc16);
        }

/* --- 子页面追加 --- */
/* 页面专属微调——仅补充本站样式表中未覆盖的细节 */
    .disclaimer-hero { background: linear-gradient(135deg, var(--bg) 0%, #eef7d3 100%); border-bottom: var(--border-w) solid var(--primary); padding: 3rem 0 2.5rem; }
.disclaimer-hero h1 { font-weight: 800; color: var(--text); font-size: 2.2rem; margin-bottom: .8rem; }
.disclaimer-hero p { color: var(--text); opacity: .85; max-width: 760px; }
.disclaimer-card { background: var(--bg); border: var(--border-w) solid var(--text); border-radius: 14px; padding: 1.6rem 1.8rem; box-shadow: var(--shadow); margin-bottom: 1.5rem; transition: transform .2s ease; }
.disclaimer-card:hover { transform: translateY(-3px); }
.disclaimer-card h3 { font-size: 1.15rem; font-weight: 700; color: var(--primary); margin-bottom: .7rem; }
.disclaimer-card h3 i { margin-right: .5rem; }
.disclaimer-card p, .disclaimer-card li { color: var(--text); opacity: .92; line-height: 1.75; font-size: .95rem; }
.disclaimer-card ul { padding-left: 1.2rem; margin-bottom: .4rem; }
.disclaimer-card ul li { margin-bottom: .35rem; }
.disclaimer-card .badge-buka { display: inline-block; background: var(--primary); color: #fff; font-size: .72rem; font-weight: 700; padding: .18rem .65rem; border-radius: 30px; letter-spacing: .3px; }
.note-box { background: rgba(132, 204, 22, .12); border-left: 5px solid var(--accent); padding: 1rem 1.3rem; border-radius: 0 10px 10px 0; margin-top: 1rem; font-size: .9rem; }
.note-box i { color: var(--primary); margin-right: .4rem; }
.navbar-buka .nav-link.active { color: var(--primary) !important; font-weight: 700; }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.accordion-header { background:transparent !important; }