/* ===== 糖心Vlog 主样式文件 ===== */
:root {
    --primary: #e85d7a;
    --primary-dark: #c94566;
    --primary-light: #fce4ec;
    --secondary: #ff8c69;
    --accent: #ff6b9d;
    --text-dark: #1a1a2e;
    --text-body: #444;
    --text-muted: #888;
    --bg-light: #fafafa;
    --bg-white: #fff;
    --border: #eee;
    --shadow: 0 4px 20px rgba(232,93,122,0.10);
    --shadow-hover: 0 8px 32px rgba(232,93,122,0.18);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
    --font: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', Arial, sans-serif;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font);
    color: var(--text-body);
    background: var(--bg-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 按钮 ===== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-align: center;
    white-space: nowrap;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(232,93,122,0.35);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(232,93,122,0.45);
    color: #fff;
}
.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}
.btn-sm { padding: 8px 18px; font-size: 13px; }
.btn-full { width: 100%; display: block; }

/* ===== 导航 ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
}
.site-logo { height: 44px; width: auto; object-fit: contain; }
.main-nav ul { display: flex; list-style: none; gap: 4px; flex-wrap: wrap; }
.main-nav ul li a {
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
}
.main-nav ul li a:hover,
.main-nav ul li a.active {
    background: var(--primary-light);
    color: var(--primary);
}
.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-dark);
    padding: 4px 8px;
}

/* ===== 搜索框 ===== */
.search-bar-wrap {
    background: var(--primary-light);
    padding: 12px 0;
    border-top: 1px solid rgba(232,93,122,0.15);
}
.search-form {
    display: flex;
    gap: 10px;
    max-width: 680px;
    margin: 0 auto;
}
.search-input {
    flex: 1;
    padding: 10px 18px;
    border: 2px solid var(--border);
    border-radius: 50px;
    font-size: 14px;
    font-family: var(--font);
    outline: none;
    transition: var(--transition);
    background: #fff;
}
.search-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(232,93,122,0.12); }
.search-btn {
    padding: 10px 24px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
}
.search-btn:hover { background: var(--primary-dark); transform: translateY(-1px); }
.search-tip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fff;
    border: 1px solid var(--primary-light);
    border-radius: 8px;
    padding: 10px 16px;
    margin-top: 8px;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
    font-size: 14px;
    color: var(--text-muted);
}
.close-tip { background: none; border: none; cursor: pointer; font-size: 18px; color: var(--text-muted); padding: 0 4px; }

/* ===== Section 通用 ===== */
.section { padding: 80px 0; }
.bg-light { background: var(--bg-light); }
.bg-gradient { background: linear-gradient(135deg, #fff5f7 0%, #fce4ec 100%); }
.section-header { text-align: center; margin-bottom: 50px; }
.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
    position: relative;
}
.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
    margin: 12px auto 0;
}
.section-subtitle { font-size: 16px; color: var(--text-muted); max-width: 600px; margin: 0 auto; }
.section-more { text-align: center; margin-top: 40px; }

/* ===== Hero Banner ===== */
.hero-banner {
    position: relative;
    min-height: 580px;
    display: flex;
    align-items: center;
    overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(26,26,46,0.72) 0%, rgba(232,93,122,0.35) 100%);
}
.hero-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    padding: 60px 20px;
}
.hero-text { flex: 1; color: #fff; }
.hero-title { font-size: 38px; font-weight: 800; line-height: 1.3; margin-bottom: 16px; text-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.hero-subtitle { font-size: 18px; opacity: 0.92; margin-bottom: 10px; }
.hero-domain { font-size: 14px; opacity: 0.8; margin-bottom: 24px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 32px; }
.hero-stats { display: flex; gap: 32px; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-num { display: block; font-size: 28px; font-weight: 800; color: #fff; }
.stat-label { font-size: 13px; opacity: 0.85; }
.hero-advisor { flex-shrink: 0; }
.advisor-card {
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: var(--radius);
    overflow: hidden;
    width: 280px;
}
.advisor-img { width: 100%; height: 180px; object-fit: cover; }
.advisor-info { padding: 16px; color: #fff; }
.advisor-info h3 { font-size: 16px; margin-bottom: 6px; }
.advisor-info p { font-size: 13px; opacity: 0.85; margin-bottom: 12px; }

/* ===== 功能卡片 ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.feature-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--primary-light); }
.feature-icon { font-size: 42px; margin-bottom: 16px; }
.feature-card h3 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

/* ===== 场景卡片 ===== */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}
.scenario-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.scenario-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.scenario-img { width: 100%; height: 200px; object-fit: cover; }
.scenario-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.scenario-body h3 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.scenario-body p { font-size: 14px; color: var(--text-muted); flex: 1; margin-bottom: 16px; }

/* ===== 视频卡片 ===== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.video-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border);
}
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.video-thumb-wrap {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
}
.video-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.video-card:hover .video-thumb { transform: scale(1.05); }
.video-play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}
.video-card:hover .video-play-btn { opacity: 1; }
.video-play-btn svg { width: 60px; height: 60px; filter: drop-shadow(0 2px 8px rgba(0,0,0,0.4)); }
.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    font-size: 12px;
    padding: 2px 7px;
    border-radius: 4px;
}
.video-tag {
    position: absolute;
    top: 8px;
    left: 8px;
    background: var(--primary);
    color: #fff;
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 600;
}
.video-info { padding: 14px; }
.video-title { font-size: 14px; font-weight: 600; color: var(--text-dark); margin-bottom: 8px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.video-meta { display: flex; gap: 12px; font-size: 12px; color: var(--text-muted); }

/* ===== 视频弹窗 ===== */
.video-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}
.modal-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.85); }
.modal-content {
    position: relative;
    z-index: 1;
    background: #111;
    border-radius: var(--radius);
    overflow: hidden;
    width: 90%;
    max-width: 800px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}
.modal-close {
    position: absolute;
    top: 12px;
    right: 16px;
    z-index: 2;
    background: rgba(255,255,255,0.15);
    border: none;
    color: #fff;
    font-size: 24px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.modal-close:hover { background: var(--primary); }
.modal-video-wrap { position: relative; aspect-ratio: 16/9; }
.modal-video { width: 100%; height: 100%; object-fit: cover; }
.modal-video-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: linear-gradient(135deg, #1a1a2e, #2d1b3d);
}
.placeholder-icon { font-size: 64px; margin-bottom: 16px; }
.modal-video-placeholder p { font-size: 18px; font-weight: 600; }
.placeholder-sub { font-size: 14px; opacity: 0.7; margin-top: 8px; }

/* ===== 更新日志 ===== */
.changelog-list { max-width: 800px; margin: 0 auto; }
.changelog-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--bg-white);
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    border-left: 4px solid var(--primary);
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.changelog-item:hover { transform: translateX(4px); }
.changelog-meta { display: flex; flex-direction: column; gap: 4px; min-width: 100px; }
.changelog-version { font-weight: 700; color: var(--primary); font-size: 14px; }
.changelog-date { font-size: 12px; color: var(--text-muted); }
.changelog-desc { font-size: 15px; color: var(--text-body); }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border-radius: var(--radius-sm); overflow: hidden; margin-bottom: 12px; box-shadow: var(--shadow); }
.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 22px;
    background: var(--bg-white);
    border: none;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    text-align: left;
    transition: var(--transition);
    font-family: var(--font);
}
.faq-question:hover { background: var(--primary-light); color: var(--primary); }
.faq-arrow { font-size: 12px; color: var(--primary); flex-shrink: 0; margin-left: 12px; }
.faq-answer { padding: 16px 22px; background: #fff9fb; border-top: 1px solid var(--primary-light); }
.faq-answer p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }
.faq-category { margin-bottom: 40px; }
.faq-cat-title { font-size: 20px; font-weight: 700; color: var(--text-dark); margin-bottom: 20px; padding-bottom: 10px; border-bottom: 2px solid var(--primary-light); }

/* ===== 用户评价 ===== */
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.review-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}
.review-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.review-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    flex-shrink: 0;
}
.review-user-info { flex: 1; }
.review-user-info strong { display: block; font-size: 15px; color: var(--text-dark); }
.review-role { font-size: 12px; color: var(--text-muted); }
.review-stars { color: #ffc107; font-size: 14px; }
.review-comment { font-size: 14px; color: var(--text-body); line-height: 1.7; margin-bottom: 14px; font-style: italic; }
.review-footer { display: flex; justify-content: space-between; align-items: center; }
.review-likes { font-size: 12px; color: var(--text-muted); }
.review-badge { font-size: 11px; background: #e8f5e9; color: #2e7d32; padding: 3px 8px; border-radius: 4px; font-weight: 600; }

/* ===== 联系我们 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 40px; align-items: start; }
.contact-info h3 { font-size: 22px; font-weight: 700; color: var(--text-dark); margin-bottom: 16px; }
.contact-phone { font-size: 28px; font-weight: 800; color: var(--primary); margin-bottom: 12px; }
.contact-info p { font-size: 15px; color: var(--text-body); margin-bottom: 8px; }
.social-links { margin-top: 24px; }
.social-links h4 { font-size: 16px; font-weight: 600; color: var(--text-dark); margin-bottom: 12px; }
.social-icons { display: flex; gap: 12px; flex-wrap: wrap; }
.social-icon {
    padding: 8px 16px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}
.social-icon:hover { background: var(--primary); color: #fff; }
.contact-form-wrap { background: var(--bg-white); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); }
.contact-form h3 { font-size: 20px; font-weight: 700; color: var(--text-dark); margin-bottom: 20px; }
.form-group { margin-bottom: 16px; }
.form-input, .form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: var(--font);
    outline: none;
    transition: var(--transition);
    background: #fafafa;
}
.form-input:focus, .form-textarea:focus { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(232,93,122,0.1); }
.form-textarea { resize: vertical; }
.contact-success {
    text-align: center;
    padding: 40px 20px;
    color: #2e7d32;
    font-size: 16px;
    font-weight: 600;
}

/* ===== 页脚 ===== */
.site-footer { background: var(--text-dark); color: rgba(255,255,255,0.85); padding: 60px 0 0; }
.footer-inner { display: grid; grid-template-columns: 1fr 2fr; gap: 40px; padding-bottom: 40px; }
.footer-brand .footer-logo { height: 40px; width: auto; margin-bottom: 16px; filter: brightness(0) invert(1); }
.footer-desc { font-size: 14px; opacity: 0.75; line-height: 1.7; margin-bottom: 10px; }
.footer-domain { font-size: 13px; opacity: 0.6; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 14px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; font-size: 13px; }
.footer-col ul li a { color: rgba(255,255,255,0.65); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--primary); }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    text-align: center;
}
.footer-bottom p { font-size: 13px; opacity: 0.6; margin-bottom: 6px; }
.footer-tags a { color: rgba(255,255,255,0.5); font-size: 12px; margin: 0 4px; transition: var(--transition); }
.footer-tags a:hover { color: var(--primary); }

/* ===== 内页通用 ===== */
.page-hero { padding: 60px 0 50px; }
.page-hero h1 { font-size: 36px; font-weight: 800; color: var(--text-dark); margin-bottom: 12px; }
.page-hero p { font-size: 16px; color: var(--text-muted); }
.breadcrumb { font-size: 13px; color: var(--text-muted); margin-bottom: 16px; }
.breadcrumb a { color: var(--primary); }
.page-content { padding: 50px 0 80px; }

/* ===== 关于页 ===== */
.about-intro { display: grid; grid-template-columns: 1fr 1.5fr; gap: 40px; align-items: start; margin-bottom: 60px; }
.about-img { border-radius: var(--radius); box-shadow: var(--shadow); }
.about-text h2 { font-size: 26px; font-weight: 700; color: var(--text-dark); margin-bottom: 16px; }
.about-text h3 { font-size: 20px; font-weight: 700; color: var(--text-dark); margin: 24px 0 12px; }
.about-text p { font-size: 15px; color: var(--text-body); margin-bottom: 14px; line-height: 1.8; }
.value-list { list-style: none; }
.value-list li { padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 14px; color: var(--text-body); }
.team-section h2 { font-size: 26px; font-weight: 700; color: var(--text-dark); margin-bottom: 30px; }
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.team-card { background: var(--bg-white); border-radius: var(--radius); padding: 24px; text-align: center; box-shadow: var(--shadow); transition: var(--transition); }
.team-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.team-avatar { width: 64px; height: 64px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; font-size: 26px; font-weight: 700; display: flex; align-items: center; justify-content: center; margin: 0 auto 14px; }
.team-card h3 { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 4px; }
.team-role { font-size: 13px; color: var(--primary); font-weight: 600; margin-bottom: 10px; display: block; }
.team-card p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ===== 功能详情页 ===== */
.features-detail { max-width: 900px; margin: 0 auto; }
.feature-detail-item { display: flex; gap: 24px; margin-bottom: 48px; padding-bottom: 48px; border-bottom: 1px solid var(--border); }
.feature-detail-item:last-child { border-bottom: none; }
.feature-detail-icon { font-size: 52px; flex-shrink: 0; width: 80px; text-align: center; }
.feature-detail-body h2 { font-size: 22px; font-weight: 700; color: var(--text-dark); margin-bottom: 12px; }
.feature-detail-body p { font-size: 15px; color: var(--text-body); margin-bottom: 14px; line-height: 1.8; }
.feature-detail-body ul { list-style: none; }
.feature-detail-body ul li { padding: 6px 0; font-size: 14px; color: var(--text-muted); padding-left: 20px; position: relative; }
.feature-detail-body ul li::before { content: '✓'; position: absolute; left: 0; color: var(--primary); font-weight: 700; }

/* ===== 时间线 ===== */
.timeline { max-width: 800px; margin: 0 auto; position: relative; padding-left: 30px; }
.timeline::before { content: ''; position: absolute; left: 10px; top: 0; bottom: 0; width: 2px; background: linear-gradient(180deg, var(--primary), var(--secondary)); }
.timeline-item { position: relative; margin-bottom: 32px; }
.timeline-dot { position: absolute; left: -24px; top: 16px; width: 14px; height: 14px; border-radius: 50%; background: var(--primary); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--primary); }
.timeline-content { background: var(--bg-white); border-radius: var(--radius-sm); padding: 20px 24px; box-shadow: var(--shadow); }
.timeline-header { display: flex; gap: 12px; align-items: center; margin-bottom: 8px; }
.timeline-version { font-weight: 700; color: var(--primary); font-size: 14px; background: var(--primary-light); padding: 3px 10px; border-radius: 4px; }
.timeline-date { font-size: 13px; color: var(--text-muted); }
.timeline-content h3 { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.timeline-content p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ===== 下载中心 ===== */
.download-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.download-card { display: flex; align-items: center; gap: 16px; background: var(--bg-white); border-radius: var(--radius-sm); padding: 20px; box-shadow: var(--shadow); transition: var(--transition); }
.download-card:hover { transform: translateX(4px); box-shadow: var(--shadow-hover); }
.download-icon { font-size: 36px; flex-shrink: 0; }
.download-info { flex: 1; }
.download-info h3 { font-size: 15px; font-weight: 700; color: var(--text-dark); margin-bottom: 6px; }
.download-info p { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; }
.download-meta { display: flex; gap: 10px; }
.download-type { font-size: 11px; background: var(--primary-light); color: var(--primary); padding: 2px 8px; border-radius: 4px; font-weight: 700; }
.download-size { font-size: 12px; color: var(--text-muted); }

/* ===== 帮助中心 ===== */
.help-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-bottom: 50px; }
.help-card { background: var(--bg-white); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); transition: var(--transition); }
.help-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.help-icon { font-size: 36px; margin-bottom: 14px; }
.help-card h3 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 14px; }
.help-card ul { list-style: none; }
.help-card ul li { padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 14px; }
.help-card ul li:last-child { border-bottom: none; }
.help-card ul li a { color: var(--text-body); transition: var(--transition); }
.help-card ul li a:hover { color: var(--primary); padding-left: 4px; }
.help-contact { background: var(--primary-light); border-radius: var(--radius); padding: 32px; text-align: center; }
.help-contact h2 { font-size: 22px; font-weight: 700; color: var(--text-dark); margin-bottom: 12px; }
.help-contact p { font-size: 15px; color: var(--text-muted); margin-bottom: 20px; }
.contact-methods { display: flex; flex-direction: column; gap: 10px; max-width: 500px; margin: 0 auto; }
.contact-method { background: #fff; border-radius: var(--radius-sm); padding: 12px 20px; font-size: 14px; color: var(--text-body); box-shadow: var(--shadow); }

/* ===== 技巧页 ===== */
.tips-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tip-card { background: var(--bg-white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); }
.tip-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.tip-body { padding: 16px; }
.tip-body h3 { font-size: 15px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; line-height: 1.5; }
.tip-body p { font-size: 13px; color: var(--text-muted); margin-bottom: 12px; line-height: 1.6; }
.tip-meta { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: var(--text-muted); }
.tip-cat-badge { background: var(--primary-light); color: var(--primary); padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 600; }

/* ===== 筛选栏 ===== */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 30px; }
.filter-btn {
    padding: 8px 20px;
    border-radius: 50px;
    border: 2px solid var(--border);
    background: var(--bg-white);
    color: var(--text-body);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
    font-weight: 500;
}
.filter-btn:hover, .filter-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }