/* ===== 蘑菇视频官网主样式 ===== */
/* 全局变量 */
:root {
  --primary: #ff5c35;
  --primary-dark: #e04a26;
  --primary-light: #ff7a5c;
  --secondary: #2d2d2d;
  --accent: #ffb347;
  --bg: #ffffff;
  --bg-light: #f8f8f8;
  --bg-section: #fff9f7;
  --text: #333333;
  --text-light: #666666;
  --text-muted: #999999;
  --border: #eeeeee;
  --shadow: 0 4px 20px rgba(255,92,53,0.10);
  --shadow-card: 0 2px 16px rgba(0,0,0,0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
  --font: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  --max-width: 1200px;
}

/* 重置 */
*, *::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); background: var(--bg); line-height: 1.7; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); }

/* 容器 */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* ===== 导航 ===== */
.site-header { background: #fff; box-shadow: 0 2px 12px rgba(0,0,0,0.06); position: sticky; top: 0; z-index: 1000; }
.navbar { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; flex-wrap: wrap; gap: 10px; }
.logo-link { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-img { width: 40px; height: 40px; object-fit: contain; }
.logo-text { font-size: 1.3rem; font-weight: 700; color: var(--primary); letter-spacing: -0.5px; }
.nav-menu { display: flex; gap: 4px; flex-wrap: wrap; }
.nav-menu a { padding: 6px 12px; border-radius: var(--radius-sm); color: var(--text); font-size: 0.9rem; font-weight: 500; transition: all var(--transition); }
.nav-menu a:hover, .nav-menu a.active { background: var(--primary); color: #fff; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all var(--transition); }

/* 搜索框 */
.search-bar-wrapper { padding: 10px 0 14px; }
.search-form { display: flex; align-items: center; background: var(--bg-light); border: 1.5px solid var(--border); border-radius: 50px; overflow: hidden; max-width: 600px; transition: border-color var(--transition), box-shadow var(--transition); }
.search-form:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(255,92,53,0.12); }
.search-input { flex: 1; padding: 10px 18px; border: none; background: transparent; font-size: 0.95rem; color: var(--text); outline: none; }
.search-input::placeholder { color: var(--text-muted); }
.search-btn { padding: 10px 18px; background: var(--primary); color: #fff; border-radius: 0 50px 50px 0; transition: background var(--transition); }
.search-btn:hover { background: var(--primary-dark); }
.search-tips { font-size: 0.85rem; color: var(--text-muted); padding: 4px 18px; min-height: 22px; }

/* ===== 按钮 ===== */
.btn-primary { display: inline-block; padding: 13px 32px; background: var(--primary); color: #fff; border-radius: 50px; font-size: 1rem; font-weight: 600; transition: all var(--transition); box-shadow: 0 4px 16px rgba(255,92,53,0.3); }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 24px rgba(255,92,53,0.4); }
.btn-secondary { display: inline-block; padding: 13px 32px; background: transparent; color: var(--primary); border: 2px solid var(--primary); border-radius: 50px; font-size: 1rem; font-weight: 600; transition: all var(--transition); }
.btn-secondary:hover { background: var(--primary); color: #fff; }
.btn-outline { display: inline-block; padding: 11px 28px; background: transparent; color: var(--primary); border: 1.5px solid var(--primary); border-radius: 50px; font-size: 0.95rem; font-weight: 500; transition: all var(--transition); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-large { padding: 16px 48px; font-size: 1.1rem; }

/* ===== 通用区块 ===== */
section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-label { display: inline-block; background: rgba(255,92,53,0.1); color: var(--primary); padding: 4px 14px; border-radius: 50px; font-size: 0.85rem; font-weight: 600; margin-bottom: 12px; }
.section-title { font-size: 2rem; font-weight: 700; color: var(--secondary); margin-bottom: 12px; }
.section-subtitle { font-size: 1rem; color: var(--text-light); max-width: 600px; margin: 0 auto; }
.section-more { text-align: center; margin-top: 40px; }
.highlight { color: var(--primary); }

/* ===== Hero ===== */
.hero-section { background: linear-gradient(135deg, #fff9f7 0%, #fff5f2 100%); padding: 80px 0; }
.hero-content { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-title { font-size: 2.6rem; font-weight: 800; color: var(--secondary); line-height: 1.25; margin-bottom: 16px; }
.hero-subtitle { font-size: 1.1rem; color: var(--text-light); margin-bottom: 12px; }
.hero-domain-tip { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 28px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-stats { display: flex; gap: 32px; }
.stat-item { text-align: center; }
.stat-item strong { display: block; font-size: 1.6rem; font-weight: 800; color: var(--primary); }
.stat-item span { font-size: 0.85rem; color: var(--text-muted); }
.hero-image img { border-radius: var(--radius-lg); box-shadow: var(--shadow); width: 100%; }

/* ===== 视频卡片 ===== */
.video-section { background: var(--bg); }
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.video-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-card); transition: transform var(--transition), box-shadow var(--transition); cursor: pointer; }
.video-card:hover { transform: translateY(-6px); box-shadow: 0 12px 40px rgba(0,0,0,0.14); }
.video-card:hover .video-overlay { opacity: 1; }
.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-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.4); display: flex; align-items: center; justify-content: center; opacity: 0; transition: opacity var(--transition); }
.play-btn { background: rgba(255,92,53,0.9); border-radius: 50%; width: 60px; height: 60px; display: flex; align-items: center; justify-content: center; transition: transform var(--transition), background var(--transition); }
.play-btn:hover { transform: scale(1.1); background: var(--primary); }
.video-duration { position: absolute; bottom: 8px; right: 8px; background: rgba(0,0,0,0.7); color: #fff; font-size: 0.75rem; padding: 2px 8px; border-radius: 4px; }
.video-tag { position: absolute; top: 8px; left: 8px; background: var(--primary); color: #fff; font-size: 0.75rem; padding: 3px 10px; border-radius: 50px; }
.video-info { padding: 14px 16px; }
.video-title { font-size: 0.95rem; font-weight: 600; color: var(--secondary); margin-bottom: 10px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.video-meta { display: flex; gap: 12px; color: var(--text-muted); font-size: 0.8rem; }
.meta-item { display: flex; align-items: center; gap: 4px; }

/* ===== 品牌故事 ===== */
.brand-story-section { background: var(--bg-section); }
.story-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.story-image img { border-radius: var(--radius-lg); box-shadow: var(--shadow); width: 100%; }
.story-content .section-title { text-align: left; font-size: 1.8rem; }
.story-content p { color: var(--text-light); margin-bottom: 16px; }
.story-content .btn-primary { margin-top: 8px; }

/* ===== 产品 ===== */
.products-section { background: var(--bg); }
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card { background: #fff; border: 1.5px solid var(--border); border-radius: var(--radius); padding: 32px 24px; text-align: center; transition: all var(--transition); position: relative; }
.product-card:hover { border-color: var(--primary); box-shadow: var(--shadow); transform: translateY(-4px); }
.product-featured { border-color: var(--primary); background: linear-gradient(135deg, #fff9f7, #fff5f2); }
.product-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--primary); color: #fff; font-size: 0.8rem; padding: 4px 16px; border-radius: 50px; white-space: nowrap; }
.product-icon { color: var(--primary); margin: 0 auto 16px; width: 60px; height: 60px; display: flex; align-items: center; justify-content: center; background: rgba(255,92,53,0.08); border-radius: 50%; }
.product-name { font-size: 1.15rem; font-weight: 700; color: var(--secondary); margin-bottom: 10px; }
.product-desc { font-size: 0.9rem; color: var(--text-light); margin-bottom: 16px; }
.product-features { text-align: left; margin-bottom: 20px; }
.product-features li { font-size: 0.88rem; color: var(--text-light); padding: 4px 0; padding-left: 16px; position: relative; }
.product-features li::before { content: '✓'; position: absolute; left: 0; color: var(--primary); font-weight: 700; }
.btn-product { display: inline-block; padding: 10px 24px; background: var(--primary); color: #fff; border-radius: 50px; font-size: 0.9rem; font-weight: 600; transition: all var(--transition); }
.btn-product:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); }

/* ===== 场景 ===== */
.scenarios-section { background: var(--bg-light); }
.scenarios-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.scenario-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-card); transition: transform var(--transition); }
.scenario-card:hover { transform: translateY(-4px); }
.scenario-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.scenario-info { padding: 16px; }
.scenario-info h3 { font-size: 1rem; font-weight: 600; color: var(--secondary); margin-bottom: 6px; }
.scenario-info p { font-size: 0.85rem; color: var(--text-light); line-height: 1.5; }

/* ===== 用户评价 ===== */
.reviews-section { background: var(--bg); }
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.review-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; transition: box-shadow var(--transition); }
.review-card:hover { box-shadow: var(--shadow); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.reviewer-avatar { width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; font-weight: 700; flex-shrink: 0; }
.reviewer-info { flex: 1; }
.reviewer-name { display: block; font-weight: 600; color: var(--secondary); font-size: 0.95rem; }
.reviewer-tag { font-size: 0.78rem; color: var(--text-muted); }
.review-rating { color: var(--accent); font-size: 0.9rem; }
.review-content { font-size: 0.9rem; color: var(--text-light); line-height: 1.65; margin-bottom: 12px; }
.review-date { font-size: 0.78rem; color: var(--text-muted); }

/* ===== 媒体推荐 ===== */
.media-section { background: var(--bg-section); }
.media-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.media-card { background: #fff; border-radius: var(--radius); padding: 28px 20px; text-align: center; box-shadow: var(--shadow-card); }
.media-icon { font-size: 2.5rem; margin-bottom: 12px; }
.media-name { font-size: 1rem; font-weight: 700; color: var(--secondary); margin-bottom: 12px; }
.media-quote { font-size: 0.88rem; color: var(--text-light); line-height: 1.65; font-style: italic; border-left: 3px solid var(--primary); padding-left: 12px; text-align: left; }

/* ===== 下载指南 ===== */
.guide-section { background: var(--bg); }
.guide-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-bottom: 48px; }
.guide-step { text-align: center; padding: 24px 16px; }
.step-number { font-size: 3rem; font-weight: 800; color: rgba(255,92,53,0.15); line-height: 1; margin-bottom: 12px; }
.step-title { font-size: 1rem; font-weight: 700; color: var(--secondary); margin-bottom: 8px; }
.guide-step p { font-size: 0.88rem; color: var(--text-light); }
.guide-cta { text-align: center; }
.guide-img { border-radius: var(--radius-lg); box-shadow: var(--shadow); margin: 0 auto 28px; max-width: 700px; }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-light); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: #fff; border-radius: var(--radius-sm); margin-bottom: 10px; overflow: hidden; box-shadow: 0 1px 6px rgba(0,0,0,0.05); }
.faq-question { width: 100%; display: flex; align-items: center; justify-content: space-between; padding: 18px 22px; text-align: left; transition: background var(--transition); }
.faq-question:hover { background: var(--bg-light); }
.faq-question.active { background: rgba(255,92,53,0.05); }
.faq-question h3 { font-size: 0.98rem; font-weight: 600; color: var(--secondary); flex: 1; }
.faq-icon { font-size: 1.4rem; color: var(--primary); font-weight: 300; transition: transform var(--transition); flex-shrink: 0; margin-left: 12px; }
.faq-question.active .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.35s ease; }
.faq-answer.open { max-height: 300px; padding: 0 22px 18px; }
.faq-answer p { font-size: 0.9rem; color: var(--text-light); line-height: 1.7; }
.faq-more { text-align: center; margin-top: 28px; }

/* ===== 联系我们 ===== */
.contact-section { background: linear-gradient(135deg, #fff9f7, #fff5f2); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.contact-info .section-title { text-align: left; font-size: 1.8rem; margin-bottom: 16px; }
.contact-info p { color: var(--text-light); margin-bottom: 24px; }
.contact-items { display: flex; flex-direction: column; gap: 14px; }
.contact-item { display: flex; align-items: center; gap: 12px; color: var(--text); font-size: 0.95rem; }
.contact-item svg { color: var(--primary); flex-shrink: 0; }
.contact-social h3 { font-size: 1.2rem; font-weight: 700; color: var(--secondary); margin-bottom: 20px; }
.social-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.social-card { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 20px; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-card); transition: all var(--transition); text-decoration: none; color: var(--text); }
.social-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); color: var(--primary); }
.social-icon { font-size: 1.8rem; }
.social-card span:last-child { font-size: 0.88rem; font-weight: 500; }

/* ===== 页脚 ===== */
.site-footer { background: #1a1a1a; color: #ccc; padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid #333; }
.footer-logo-link { display: flex; align-items: center; gap: 10px; text-decoration: none; margin-bottom: 14px; }
.footer-logo { width: 48px; height: 48px; object-fit: contain; }
.footer-brand-name { font-size: 1.2rem; font-weight: 700; color: #fff; }
.footer-slogan { font-size: 0.88rem; color: #999; margin-bottom: 8px; }
.footer-domain { font-size: 0.85rem; color: #888; }
.footer-nav-title { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-nav ul li { margin-bottom: 8px; }
.footer-nav ul li a { font-size: 0.88rem; color: #999; transition: color var(--transition); }
.footer-nav ul li a:hover { color: var(--primary); }
.footer-download p { font-size: 0.88rem; color: #999; margin-bottom: 14px; }
.btn-download-footer { display: inline-block; padding: 9px 22px; background: var(--primary); color: #fff; border-radius: 50px; font-size: 0.88rem; font-weight: 600; transition: background var(--transition); }
.btn-download-footer:hover { background: var(--primary-dark); color: #fff; }
.footer-web-entry { margin-top: 10px; font-size: 0.82rem; color: #888; }
.footer-web-entry a { color: var(--primary); }
.footer-contact p { font-size: 0.88rem; color: #999; margin-bottom: 8px; }
.social-links { display: flex; gap: 10px; margin-top: 14px; }
.social-link { padding: 6px 14px; background: #333; color: #ccc; border-radius: 50px; font-size: 0.82rem; transition: all var(--transition); }
.social-link:hover { background: var(--primary); color: #fff; }
.footer-bottom { padding: 20px 0; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.footer-copyright { font-size: 0.85rem; color: #888; }
.footer-update { font-size: 0.82rem; color: #666; }
.footer-legal { display: flex; gap: 16px; }
.footer-legal a { font-size: 0.82rem; color: #888; transition: color var(--transition); }
.footer-legal a:hover { color: var(--primary); }

/* ===== 返回顶部 ===== */
.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 46px; height: 46px; background: var(--primary); color: #fff; border-radius: 50%; font-size: 1.4rem; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 16px rgba(255,92,53,0.4); opacity: 0; pointer-events: none; transition: opacity var(--transition), transform var(--transition); z-index: 999; }
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { transform: translateY(-3px); }

/* ===== 内页通用 ===== */
.page-hero { background: linear-gradient(135deg, #fff9f7, #fff5f2); padding: 60px 0 50px; }
.page-hero-title { font-size: 2.2rem; font-weight: 800; color: var(--secondary); margin-bottom: 12px; }
.page-hero-desc { font-size: 1rem; color: var(--text-light); max-width: 600px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 16px; }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--text-muted); }
.page-content { padding: 60px 0; }
.content-grid { display: grid; grid-template-columns: 1fr 3fr; gap: 40px; align-items: start; }
.sidebar { background: var(--bg-light); border-radius: var(--radius); padding: 24px; position: sticky; top: 100px; }
.sidebar-title { font-size: 1rem; font-weight: 700; color: var(--secondary); margin-bottom: 16px; padding-bottom: 10px; border-bottom: 2px solid var(--primary); }
.sidebar-menu li { margin-bottom: 6px; }
.sidebar-menu a { display: block; padding: 8px 12px; border-radius: var(--radius-sm); font-size: 0.9rem; color: var(--text-light); transition: all var(--transition); }
.sidebar-menu a:hover, .sidebar-menu a.active { background: var(--primary); color: #fff; }
.main-content h2 { font-size: 1.6rem; font-weight: 700; color: var(--secondary); margin: 32px 0 16px; }
.main-content h3 { font-size: 1.2rem; font-weight: 600; color: var(--secondary); margin: 24px 0 12px; }
.main-content p { color: var(--text-light); margin-bottom: 16px; line-height: 1.8; }
.main-content ul { margin: 0 0 16px 20px; list-style: disc; }
.main-content ul li { color: var(--text-light); margin-bottom: 8px; font-size: 0.95rem; }
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin: 24px 0; }
.feature-item { background: var(--bg-light); border-radius: var(--radius-sm); padding: 20px; border-left: 4px solid var(--primary); }
.feature-item h4 { font-size: 1rem; font-weight: 600; color: var(--secondary); margin-bottom: 8px; }
.feature-item p { font-size: 0.88rem; color: var(--text-light); margin: 0; }
.step-list { counter-reset: step; }
.step-list-item { display: flex; gap: 16px; margin-bottom: 24px; align-items: flex-start; }
.step-list-item::before { counter-increment: step; content: counter(step); min-width: 36px; height: 36px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.9rem; flex-shrink: 0; }
.step-list-item-content h4 { font-size: 1rem; font-weight: 600; color: var(--secondary); margin-bottom: 6px; }
.step-list-item-content p { font-size: 0.9rem; color: var(--text-light); margin: 0; }
.changelog-item { border-left: 3px solid var(--primary); padding: 16px 20px; margin-bottom: 20px; background: var(--bg-light); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.changelog-version { font-size: 1rem; font-weight: 700; color: var(--secondary); }
.changelog-date { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 10px; }
.changelog-list { list-style: none; }
.changelog-list li { font-size: 0.9rem; color: var(--text-light); padding: 4px 0; padding-left: 14px; position: relative; }
.changelog-list li::before { content: '•'; position: absolute; left: 0; color: var(--primary); }
.download-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 24px 0; }
.download-card { background: #fff; border: 1.5px solid var(--border); border-radius: var(--radius); padding: 28px 20px; text-align: center; transition: all var(--transition); }
.download-card:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.download-card-icon { font-size: 3rem; margin-bottom: 14px; }
.download-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--secondary); margin-bottom: 8px; }
.download-card p { font-size: 0.88rem; color: var(--text-light); margin-bottom: 16px; }
.btn-download { display: inline-block; padding: 10px 24px; background: var(--primary); color: #fff; border-radius: 50px; font-size: 0.9rem; font-weight: 600; transition: all var(--transition); }
.btn-download:hover { background: var(--primary-dark); color: #fff; }