/* 抖荫短视频抖荫短视频社区 - 主样式文件 */
/* kLvvw84.cn */

:root {
    --primary: #1a6b3c;
    --primary-dark: #0d4a28;
    --primary-light: #2d9c5a;
    --accent: #f0a500;
    --accent-dark: #c8870a;
    --text-dark: #1a1a1a;
    --text-mid: #444;
    --text-light: #777;
    --bg-light: #f5f9f5;
    --bg-white: #fff;
    --border: #d4e8d4;
    --shadow: 0 4px 20px rgba(26,107,60,0.12);
    --shadow-hover: 0 8px 32px rgba(26,107,60,0.22);
    --radius: 12px;
    --radius-sm: 6px;
    --transition: all 0.3s ease;
}

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

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

body {
    font-family: "PingFang SC","Microsoft YaHei","Hiragino Sans GB",Arial,sans-serif;
    color: var(--text-dark);
    background: var(--bg-white);
    line-height: 1.7;
    overflow-x: hidden;
}

/* ===== HIDDEN DISTURBANCE TAGS (绝对不破坏布局) ===== */
.seo-noise {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    position: absolute !important;
    width: 0 !important;
    height: 0 !important;
    overflow: hidden !important;
    clip: rect(0,0,0,0) !important;
    pointer-events: none !important;
    z-index: -9999 !important;
    font-size: 0 !important;
    line-height: 0 !important;
}

/* ===== TYPOGRAPHY ===== */
h1,h2,h3,h4,h5,h6 { font-weight: 700; line-height: 1.3; color: var(--primary-dark); }
h1 { font-size: clamp(1.8rem,4vw,2.8rem); }
h2 { font-size: clamp(1.4rem,3vw,2rem); }
h3 { font-size: clamp(1.1rem,2.5vw,1.5rem); }
h4 { font-size: 1.1rem; }
p { margin-bottom: 1rem; color: var(--text-mid); }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-light); }

/* ===== LAYOUT ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 70px 0; }
.section-alt { background: var(--bg-light); }
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 { position: relative; display: inline-block; padding-bottom: 14px; }
.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0; left: 50%;
    transform: translateX(-50%);
    width: 60px; height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
}
.section-title p { color: var(--text-light); margin-top: 12px; font-size: 1rem; }

/* ===== HEADER ===== */
#site-header {
    position: sticky; top: 0; z-index: 1000;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 12px rgba(26,107,60,0.08);
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 68px; gap: 20px;
}
.site-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.site-logo img { height: 44px; width: auto; }
.site-logo .logo-text { font-size: 1.4rem; font-weight: 800; color: var(--primary-dark); letter-spacing: -0.5px; }
.site-logo .logo-sub { font-size: 0.7rem; color: var(--text-light); display: block; }

/* NAV */
#main-nav { display: flex; align-items: center; gap: 4px; }
#main-nav a {
    padding: 8px 14px; border-radius: var(--radius-sm);
    font-size: 0.92rem; font-weight: 600; color: var(--text-dark);
    white-space: nowrap; transition: var(--transition);
}
#main-nav a:hover, #main-nav a.active {
    background: var(--primary); color: #fff;
}

/* SEARCH BAR */
.header-search { display: flex; align-items: center; gap: 0; }
.header-search input {
    border: 1.5px solid var(--border); border-right: none;
    padding: 8px 14px; border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    font-size: 0.9rem; width: 200px; outline: none;
    transition: var(--transition);
}
.header-search input:focus { border-color: var(--primary); }
.header-search button {
    background: var(--primary); color: #fff;
    border: none; padding: 8px 16px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    cursor: pointer; font-size: 0.9rem; transition: var(--transition);
}
.header-search button:hover { background: var(--primary-dark); }

/* MOBILE MENU */
.menu-toggle {
    display: none; background: none; border: none;
    cursor: pointer; padding: 8px; flex-direction: column; gap: 5px;
}
.menu-toggle span {
    display: block; width: 24px; height: 2px;
    background: var(--primary-dark); border-radius: 2px; transition: var(--transition);
}

/* ===== HERO BANNER ===== */
#hero-banner {
    position: relative; min-height: 580px;
    display: flex; align-items: center;
    overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0;
    background-size: cover; background-position: center;
    background-image: url('../images/banner.jpg');
}
.hero-bg::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(13,74,40,0.82) 0%, rgba(26,107,60,0.55) 60%, rgba(0,0,0,0.25) 100%);
}
.hero-content {
    position: relative; z-index: 2;
    max-width: 700px; color: #fff;
    padding: 60px 0;
}
.hero-content h1 { color: #fff; font-size: clamp(2rem,5vw,3.2rem); text-shadow: 0 2px 12px rgba(0,0,0,0.3); }
.hero-content .hero-sub { font-size: 1.1rem; opacity: 0.92; margin: 16px 0 28px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.hero-tag {
    background: rgba(255,255,255,0.18); color: #fff;
    padding: 4px 12px; border-radius: 20px; font-size: 0.82rem;
    border: 1px solid rgba(255,255,255,0.3);
}
.hero-stats { display: flex; gap: 32px; margin-top: 28px; }
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 1.8rem; font-weight: 800; color: var(--accent); }
.hero-stat .label { font-size: 0.8rem; opacity: 0.85; }

/* BUTTONS */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 12px 28px; border-radius: var(--radius-sm);
    font-size: 0.95rem; font-weight: 600; cursor: pointer;
    transition: var(--transition); border: none; text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: var(--bg-light); color: var(--primary-dark); }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }

/* ===== VIDEO CARDS ===== */
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px,1fr)); gap: 24px; }
.video-card {
    background: var(--bg-white); border-radius: var(--radius);
    overflow: hidden; box-shadow: var(--shadow);
    transition: var(--transition); cursor: pointer;
}
.video-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.video-thumb {
    position: relative; padding-top: 56.25%; overflow: hidden;
    background: #111;
}
.video-thumb img {
    position: absolute; inset: 0; width: 100%; height: 100%;
    object-fit: cover; transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    background: rgba(0,0,0,0); transition: var(--transition);
    opacity: 0;
}
.video-card:hover .video-play-btn { opacity: 1; background: rgba(0,0,0,0.35); }
.video-play-btn svg {
    width: 60px; height: 60px; fill: rgba(255,255,255,0.92);
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.4));
    transform: scale(0.8); transition: transform 0.25s ease;
}
.video-card:hover .video-play-btn svg { transform: scale(1); }
.video-badge {
    position: absolute; top: 10px; left: 10px;
    background: var(--primary); color: #fff;
    padding: 3px 10px; border-radius: 4px; font-size: 0.75rem; font-weight: 600;
}
.video-duration {
    position: absolute; bottom: 8px; right: 10px;
    background: rgba(0,0,0,0.72); color: #fff;
    padding: 2px 8px; border-radius: 4px; font-size: 0.78rem;
}
.video-info { padding: 14px 16px; }
.video-info h3 { font-size: 0.97rem; margin-bottom: 8px; color: var(--text-dark); line-height: 1.4; }
.video-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--text-light); }
.video-meta span { display: flex; align-items: center; gap: 4px; }

/* ===== EXPERT CARDS ===== */
.expert-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px,1fr)); gap: 28px; }
.expert-card {
    background: var(--bg-white); border-radius: var(--radius);
    padding: 28px 20px; text-align: center;
    box-shadow: var(--shadow); transition: var(--transition);
    border: 1px solid var(--border);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.expert-avatar {
    width: 90px; height: 90px; border-radius: 50%;
    object-fit: cover; margin: 0 auto 14px;
    border: 3px solid var(--primary-light);
}
.expert-card h3 { font-size: 1.05rem; margin-bottom: 4px; }
.expert-role { color: var(--primary); font-size: 0.85rem; font-weight: 600; margin-bottom: 10px; }
.expert-desc { font-size: 0.85rem; color: var(--text-light); margin-bottom: 14px; line-height: 1.6; }
.expert-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 14px; }
.expert-tag { background: var(--bg-light); color: var(--primary); padding: 3px 10px; border-radius: 20px; font-size: 0.75rem; }
.expert-actions { display: flex; gap: 8px; justify-content: center; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    border: 1px solid var(--border); border-radius: var(--radius);
    margin-bottom: 12px; overflow: hidden;
}
.faq-q {
    padding: 18px 22px; cursor: pointer;
    display: flex; align-items: center; justify-content: space-between;
    font-weight: 600; font-size: 0.97rem; color: var(--text-dark);
    background: var(--bg-white); transition: var(--transition);
}
.faq-q:hover { background: var(--bg-light); color: var(--primary); }
.faq-q.active { background: var(--primary); color: #fff; }
.faq-q .faq-icon { font-size: 1.2rem; transition: transform 0.3s; flex-shrink: 0; }
.faq-q.active .faq-icon { transform: rotate(45deg); }
.faq-a {
    padding: 0 22px; max-height: 0; overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    font-size: 0.92rem; color: var(--text-mid); background: var(--bg-light);
}
.faq-a.open { max-height: 300px; padding: 16px 22px; }

/* ===== REVIEWS ===== */
.reviews-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px,1fr)); gap: 22px; }
.review-card {
    background: var(--bg-white); border-radius: var(--radius);
    padding: 22px; box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
}
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.review-avatar {
    width: 46px; height: 46px; border-radius: 50%;
    background: var(--primary); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem; font-weight: 700; flex-shrink: 0;
}
.review-name { font-weight: 600; font-size: 0.95rem; }
.review-stars { color: var(--accent); font-size: 0.85rem; }
.review-text { font-size: 0.88rem; color: var(--text-mid); line-height: 1.7; }
.review-date { font-size: 0.78rem; color: var(--text-light); margin-top: 10px; }

/* ===== PARTNER LOGOS ===== */
.partner-grid { display: flex; flex-wrap: wrap; gap: 20px; justify-content: center; align-items: center; }
.partner-item {
    background: var(--bg-white); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 14px 24px;
    font-weight: 700; color: var(--primary-dark); font-size: 0.95rem;
    transition: var(--transition);
}
.partner-item:hover { border-color: var(--primary); box-shadow: var(--shadow); transform: translateY(-2px); }

/* ===== CONTACT ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info h3 { margin-bottom: 20px; }
.contact-item { display: flex; gap: 14px; margin-bottom: 18px; align-items: flex-start; }
.contact-icon {
    width: 42px; height: 42px; border-radius: 50%;
    background: var(--primary); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem; flex-shrink: 0;
}
.contact-text strong { display: block; font-size: 0.85rem; color: var(--text-light); margin-bottom: 2px; }
.contact-text span { font-size: 0.95rem; color: var(--text-dark); }

/* ===== SOCIAL SHARE ===== */
.social-share { display: flex; gap: 10px; flex-wrap: wrap; }
.share-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 16px; border-radius: 20px; font-size: 0.85rem;
    font-weight: 600; cursor: pointer; transition: var(--transition);
    border: none; text-decoration: none;
}
.share-wechat { background: #07c160; color: #fff; }
.share-weibo { background: #e6162d; color: #fff; }
.share-douyin { background: #010101; color: #fff; }
.share-bili { background: #00a1d6; color: #fff; }
.share-btn:hover { opacity: 0.85; transform: translateY(-2px); color: #fff; }

/* ===== BREADCRUMB ===== */
.breadcrumb {
    padding: 12px 0; font-size: 0.85rem; color: var(--text-light);
    border-bottom: 1px solid var(--border); margin-bottom: 30px;
}
.breadcrumb a { color: var(--primary); }
.breadcrumb span { margin: 0 6px; }

/* ===== TAGS ===== */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
    background: var(--bg-light); color: var(--primary);
    padding: 5px 14px; border-radius: 20px; font-size: 0.82rem;
    border: 1px solid var(--border); transition: var(--transition);
    cursor: pointer;
}
.tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ===== STATS BAR ===== */
.stats-bar { background: var(--primary-dark); color: #fff; padding: 40px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; text-align: center; }
.stat-item .num { font-size: 2.2rem; font-weight: 800; color: var(--accent); }
.stat-item .label { font-size: 0.85rem; opacity: 0.85; margin-top: 4px; }

/* ===== FEATURE CARDS ===== */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap: 24px; }
.feature-card {
    background: var(--bg-white); border-radius: var(--radius);
    padding: 28px 22px; text-align: center;
    box-shadow: var(--shadow); border-top: 3px solid var(--primary);
    transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.feature-icon { font-size: 2.4rem; margin-bottom: 14px; }
.feature-card h3 { font-size: 1rem; margin-bottom: 10px; }
.feature-card p { font-size: 0.85rem; color: var(--text-light); margin: 0; }

/* ===== FOOTER ===== */
#site-footer {
    background: var(--primary-dark); color: rgba(255,255,255,0.85);
    padding: 60px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand .logo-text { color: #fff; font-size: 1.3rem; font-weight: 800; }
.footer-brand p { font-size: 0.85rem; opacity: 0.75; margin-top: 12px; line-height: 1.8; }
.footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: rgba(255,255,255,0.7); font-size: 0.85rem; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent); }
.footer-qr { display: flex; gap: 20px; margin-top: 16px; }
.footer-qr-item { text-align: center; }
.footer-qr-item img { width: 80px; height: 80px; border-radius: 6px; border: 2px solid rgba(255,255,255,0.2); }
.footer-qr-item span { display: block; font-size: 0.72rem; opacity: 0.7; margin-top: 6px; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.12);
    padding: 20px 0; text-align: center;
    font-size: 0.82rem; opacity: 0.65;
}
.footer-bottom a { color: rgba(255,255,255,0.7); margin: 0 8px; }

/* ===== NOTICE BAR ===== */
.notice-bar {
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    color: #fff; padding: 10px 0; font-size: 0.85rem; overflow: hidden;
}
.notice-inner { display: flex; align-items: center; gap: 16px; }
.notice-label { background: var(--accent); color: #fff; padding: 2px 10px; border-radius: 4px; font-weight: 700; flex-shrink: 0; }
.notice-scroll { overflow: hidden; flex: 1; }
.notice-text { white-space: nowrap; animation: scrollText 30s linear infinite; }
@keyframes scrollText { from { transform: translateX(100%); } to { transform: translateX(-100%); } }

/* ===== AI SECTION ===== */
.ai-card {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: #fff; border-radius: var(--radius); padding: 28px;
    position: relative; overflow: hidden;
}
.ai-card::before {
    content: ''; position: absolute; top: -40px; right: -40px;
    width: 160px; height: 160px; border-radius: 50%;
    background: rgba(255,255,255,0.07);
}
.ai-card h3 { color: #fff; margin-bottom: 10px; }
.ai-card p { opacity: 0.85; font-size: 0.88rem; }

/* ===== COMMUNITY ===== */
.community-card {
    background: var(--bg-white); border-radius: var(--radius);
    overflow: hidden; box-shadow: var(--shadow); transition: var(--transition);
}
.community-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.community-img { width: 100%; height: 180px; object-fit: cover; }
.community-body { padding: 18px; }
.community-body h3 { font-size: 1rem; margin-bottom: 8px; }
.community-body p { font-size: 0.85rem; color: var(--text-light); margin: 0; }
.community-footer { padding: 12px 18px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; font-size: 0.82rem; color: var(--text-light); }

/* ===== TABS ===== */
.tab-nav { display: flex; gap: 4px; border-bottom: 2px solid var(--border); margin-bottom: 28px; }
.tab-btn {
    padding: 10px 20px; cursor: pointer; font-weight: 600;
    font-size: 0.9rem; border: none; background: none;
    color: var(--text-light); border-bottom: 3px solid transparent;
    margin-bottom: -2px; transition: var(--transition);
}
.tab-btn.active, .tab-btn:hover { color: var(--primary); border-bottom-color: var(--primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.75);
    z-index: 9999; display: none; align-items: center; justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal-box {
    background: #000; border-radius: var(--radius);
    width: 90%; max-width: 800px; position: relative;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.modal-close {
    position: absolute; top: -16px; right: -16px;
    width: 36px; height: 36px; border-radius: 50%;
    background: #fff; border: none; cursor: pointer;
    font-size: 1.1rem; display: flex; align-items: center; justify-content: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.modal-video { width: 100%; aspect-ratio: 16/9; border-radius: var(--radius); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .stats-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
    #main-nav { display: none; position: absolute; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px; box-shadow: 0 8px 20px rgba(0,0,0,0.1); border-top: 1px solid var(--border); }
    #main-nav.open { display: flex; }
    #main-nav a { padding: 12px 16px; border-radius: var(--radius-sm); }
    .menu-toggle { display: flex; }
    .header-search { display: none; }
    .header-search.open { display: flex; position: absolute; top: 68px; left: 0; right: 0; padding: 10px 20px; background: #fff; border-top: 1px solid var(--border); }
    .header-search.open input { flex: 1; }
    .hero-stats { gap: 18px; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .stats-grid { grid-template-columns: repeat(2,1fr); }
    .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px,1fr)); }
}
@media (max-width: 480px) {
    .section { padding: 48px 0; }
    .hero-stats { flex-wrap: wrap; gap: 14px; }
    .video-grid { grid-template-columns: 1fr; }
    .expert-grid { grid-template-columns: 1fr 1fr; }
}

/* ===== LAZY LOAD ===== */
img[data-src] { opacity: 0; transition: opacity 0.4s; }
img.loaded { opacity: 1; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-light); }
::-webkit-scrollbar-thumb { background: var(--primary-light); border-radius: 3px; }

/* ===== UTILITY ===== */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-8 { margin-bottom: 2rem; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
@media (max-width: 768px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }