/* ===== 蘑菇视频 主样式 ===== */
:root {
  --primary: #2d6a4f;
  --primary-light: #52b788;
  --accent: #f4a261;
  --accent-dark: #e76f51;
  --dark: #1a1a2e;
  --text: #2d3436;
  --text-muted: #636e72;
  --bg: #ffffff;
  --bg-light: #f8f9fa;
  --bg-section: #f0f4f1;
  --border: #e0e6e1;
  --shadow: 0 4px 24px rgba(45,106,79,0.08);
  --shadow-hover: 0 12px 40px rgba(45,106,79,0.18);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  --font-main: 'PingFang SC','Noto Sans SC','Microsoft YaHei',sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-main);color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:var(--transition)}
ul,ol{list-style:none}

/* ===== 通用 ===== */
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-sm{padding:64px 0}
.section-title{font-size:clamp(1.8rem,3vw,2.6rem);font-weight:700;color:var(--dark);letter-spacing:-0.02em;margin-bottom:16px}
.section-subtitle{font-size:1.1rem;color:var(--text-muted);max-width:560px;line-height:1.8}
.section-header{margin-bottom:56px}
.section-header.center{text-align:center}
.section-header.center .section-subtitle{margin:0 auto}
.tag{display:inline-block;padding:4px 14px;background:rgba(82,183,136,0.12);color:var(--primary);border-radius:100px;font-size:0.8rem;font-weight:600;letter-spacing:0.05em;text-transform:uppercase;margin-bottom:16px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:100px;font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition);border:none;outline:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-light);transform:translateY(-2px);box-shadow:0 8px 24px rgba(45,106,79,0.3)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(244,162,97,0.4)}

/* ===== 顶部公告栏 ===== */
.top-bar{background:var(--primary);color:#fff;text-align:center;padding:10px 24px;font-size:0.85rem}
.top-bar a{color:var(--accent);font-weight:600}

/* ===== 导航 ===== */
.navbar{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,0.95);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);transition:var(--transition)}
.navbar.scrolled{box-shadow:0 2px 20px rgba(0,0,0,0.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:32px}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:1.3rem;font-weight:800;color:var(--primary)}
.nav-logo img{width:36px;height:36px;border-radius:8px;object-fit:cover}
.nav-logo span{background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-links{display:flex;align-items:center;gap:8px}
.nav-links a{padding:8px 16px;border-radius:8px;font-size:0.95rem;color:var(--text-muted);font-weight:500;transition:var(--transition)}
.nav-links a:hover,.nav-links a.active{color:var(--primary);background:rgba(45,106,79,0.06)}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-download{padding:10px 22px;background:var(--primary);color:#fff;border-radius:100px;font-size:0.9rem;font-weight:600;transition:var(--transition)}
.nav-download:hover{background:var(--primary-light);transform:translateY(-1px)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}

/* ===== 搜索栏 ===== */
.search-bar{background:var(--bg-section);border-bottom:1px solid var(--border);padding:12px 0}
.search-inner{display:flex;align-items:center;gap:12px;max-width:720px;margin:0 auto;padding:0 24px}
.search-wrap{flex:1;position:relative}
.search-wrap input{width:100%;padding:10px 20px 10px 44px;border:1.5px solid var(--border);border-radius:100px;font-size:0.95rem;background:#fff;color:var(--text);outline:none;transition:var(--transition);font-family:var(--font-main)}
.search-wrap input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(45,106,79,0.1)}
.search-wrap::before{content:'🔍';position:absolute;left:16px;top:50%;transform:translateY(-50%);font-size:1rem;pointer-events:none}
.search-btn{padding:10px 24px;background:var(--primary);color:#fff;border:none;border-radius:100px;font-size:0.9rem;font-weight:600;cursor:pointer;transition:var(--transition);font-family:var(--font-main)}
.search-btn:hover{background:var(--primary-light)}

/* ===== Hero Banner ===== */
.hero{position:relative;min-height:90vh;display:flex;align-items:center;overflow:hidden;background:linear-gradient(135deg,#0d2818 0%,#1a4a2e 40%,#2d6a4f 100%)}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:0.25}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(13,40,24,0.85) 0%,rgba(45,106,79,0.6) 100%);z-index:1}
.hero-content{position:relative;z-index:2;max-width:720px}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;background:rgba(82,183,136,0.2);border:1px solid rgba(82,183,136,0.4);border-radius:100px;color:var(--primary-light);font-size:0.85rem;font-weight:600;margin-bottom:24px;backdrop-filter:blur(8px)}
.hero h1{font-size:clamp(2.4rem,5vw,4rem);font-weight:800;color:#fff;line-height:1.2;letter-spacing:-0.03em;margin-bottom:20px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero-desc{font-size:1.15rem;color:rgba(255,255,255,0.8);line-height:1.8;margin-bottom:40px;max-width:560px}
.hero-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;align-items:center;gap:32px;margin-top:56px;padding-top:40px;border-top:1px solid rgba(255,255,255,0.15)}
.hero-stat-item{text-align:center}
.hero-stat-num{font-size:1.8rem;font-weight:800;color:#fff;display:block}
.hero-stat-label{font-size:0.8rem;color:rgba(255,255,255,0.6);margin-top:4px}
.hero-visual{position:absolute;right:0;top:50%;transform:translateY(-50%);width:50%;max-width:640px;z-index:2;padding-right:40px}
.hero-visual img{border-radius:var(--radius-lg);box-shadow:0 32px 80px rgba(0,0,0,0.4)}

/* ===== 品牌介绍 ===== */
.about-section{background:var(--bg)}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.about-img{position:relative}
.about-img img{border-radius:var(--radius-lg);box-shadow:var(--shadow-hover)}
.about-img-badge{position:absolute;bottom:-24px;right:-24px;background:#fff;border-radius:var(--radius);padding:20px 24px;box-shadow:var(--shadow-hover);text-align:center}
.about-img-badge strong{display:block;font-size:1.6rem;font-weight:800;color:var(--primary)}
.about-img-badge span{font-size:0.8rem;color:var(--text-muted)}
.about-text .section-subtitle{margin-bottom:32px}
.about-features{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:32px}
.about-feature{display:flex;align-items:flex-start;gap:12px;padding:16px;background:var(--bg-section);border-radius:var(--radius)}
.about-feature-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--primary),var(--primary-light));border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0}
.about-feature-text strong{display:block;font-size:0.9rem;font-weight:700;color:var(--dark);margin-bottom:4px}
.about-feature-text span{font-size:0.8rem;color:var(--text-muted)}

/* ===== 视频展示 ===== */
.videos-section{background:var(--bg-section)}
.videos-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.video-card{background:#fff;border-radius:var(--radius-lg);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;aspect-ratio:16/9;overflow:hidden;background:#1a1a2e}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s ease}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.video-play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0);transition:var(--transition)}
.video-card:hover .video-play-btn{background:rgba(0,0,0,0.4)}
.play-icon{width:56px;height:56px;background:rgba(255,255,255,0.9);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transform:scale(0.8);transition:var(--transition);backdrop-filter:blur(8px)}
.video-card:hover .play-icon{opacity:1;transform:scale(1)}
.play-icon svg{width:20px;height:20px;fill:var(--primary);margin-left:4px}
.video-meta{padding:20px}
.video-category{font-size:0.75rem;font-weight:600;color:var(--primary);text-transform:uppercase;letter-spacing:0.06em;margin-bottom:8px}
.video-title{font-size:1rem;font-weight:700;color:var(--dark);margin-bottom:12px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-stats{display:flex;align-items:center;gap:16px;font-size:0.8rem;color:var(--text-muted)}
.video-stats span{display:flex;align-items:center;gap:4px}
.videos-more{text-align:center;margin-top:48px}

/* ===== 核心功能 ===== */
.features-section{background:var(--bg)}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.feature-card{padding:40px 32px;border-radius:var(--radius-lg);border:1.5px solid var(--border);transition:var(--transition);position:relative;overflow:hidden}
.feature-card::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(45,106,79,0.04),rgba(82,183,136,0.04));opacity:0;transition:var(--transition)}
.feature-card:hover{border-color:var(--primary-light);transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.feature-card:hover::before{opacity:1}
.feature-icon{width:56px;height:56px;background:linear-gradient(135deg,var(--primary),var(--primary-light));border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:24px}
.feature-card h3{font-size:1.15rem;font-weight:700;color:var(--dark);margin-bottom:12px}
.feature-card p{font-size:0.9rem;color:var(--text-muted);line-height:1.7}

/* ===== 数据实力 ===== */
.stats-section{background:linear-gradient(135deg,var(--primary) 0%,#1b4332 100%);color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:40px;text-align:center}
.stat-item{}
.stat-num{font-size:clamp(2rem,4vw,3rem);font-weight:800;color:#fff;display:block;margin-bottom:8px}
.stat-num em{font-style:normal;color:var(--accent)}
.stat-label{font-size:0.9rem;color:rgba(255,255,255,0.7)}

/* ===== 用户评价 ===== */
.testimonials-section{background:var(--bg-section)}
.testimonials-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.testimonial-card{background:#fff;border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow);transition:var(--transition)}
.testimonial-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.testimonial-stars{display:flex;gap:4px;margin-bottom:16px}
.testimonial-stars span{color:var(--accent);font-size:1rem}
.testimonial-text{font-size:0.95rem;color:var(--text);line-height:1.8;margin-bottom:24px;font-style:italic}
.testimonial-user{display:flex;align-items:center;gap:12px}
.testimonial-avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-light));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1rem;flex-shrink:0}
.testimonial-name{font-weight:700;font-size:0.9rem;color:var(--dark)}
.testimonial-role{font-size:0.8rem;color:var(--text-muted)}

/* ===== FAQ ===== */
.faq-section{background:var(--bg)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border)}
.faq-question{display:flex;align-items:center;justify-content:space-between;padding:24px 0;cursor:pointer;font-size:1rem;font-weight:600;color:var(--dark);transition:var(--transition);gap:16px}
.faq-question:hover{color:var(--primary)}
.faq-icon{width:28px;height:28px;border-radius:50%;background:var(--bg-section);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:var(--transition);font-size:1.1rem;color:var(--primary)}
.faq-item.active .faq-icon{background:var(--primary);color:#fff;transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.4s ease,padding 0.3s ease}
.faq-answer-inner{padding:0 0 24px;font-size:0.95rem;color:var(--text-muted);line-height:1.8}
.faq-item.active .faq-answer{max-height:300px}

/* ===== 下载区 ===== */
.download-section{background:linear-gradient(135deg,#0d2818,#1a4a2e)}
.download-inner{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.download-text h2{font-size:clamp(1.8rem,3vw,2.6rem);font-weight:800;color:#fff;margin-bottom:16px}
.download-text p{color:rgba(255,255,255,0.7);font-size:1rem;line-height:1.8;margin-bottom:40px}
.download-btns{display:flex;gap:16px;flex-wrap:wrap}
.download-btn{display:flex;align-items:center;gap:12px;padding:14px 24px;background:rgba(255,255,255,0.1);border:1.5px solid rgba(255,255,255,0.2);border-radius:var(--radius);color:#fff;transition:var(--transition);backdrop-filter:blur(8px)}
.download-btn:hover{background:rgba(255,255,255,0.2);border-color:rgba(255,255,255,0.4);transform:translateY(-2px)}
.download-btn-icon{font-size:1.8rem}
.download-btn-text small{display:block;font-size:0.7rem;opacity:0.7;margin-bottom:2px}
.download-btn-text strong{font-size:1rem;font-weight:700}
.download-qr{background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.1);border-radius:var(--radius-lg);padding:40px;text-align:center}
.qr-placeholder{width:160px;height:160px;background:#fff;border-radius:12px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;font-size:3rem}
.download-qr p{color:rgba(255,255,255,0.7);font-size:0.85rem}

/* ===== 联系我们 ===== */
.contact-section{background:var(--bg-section)}
.contact-grid{display:grid;grid-template-columns:1fr 1.5fr;gap:64px;align-items:start}
.contact-info h3{font-size:1.3rem;font-weight:700;color:var(--dark);margin-bottom:24px}
.contact-item{display:flex;align-items:flex-start;gap:16px;margin-bottom:24px}
.contact-item-icon{width:44px;height:44px;background:rgba(45,106,79,0.1);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0}
.contact-item-text strong{display:block;font-size:0.85rem;font-weight:700;color:var(--dark);margin-bottom:4px}
.contact-item-text span{font-size:0.9rem;color:var(--text-muted)}
.contact-social{margin-top:32px}
.contact-social h4{font-size:0.9rem;font-weight:700;color:var(--dark);margin-bottom:16px}
.social-links{display:flex;gap:12px}
.social-link{width:40px;height:40px;border-radius:10px;background:var(--bg);border:1.5px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:1.1rem;transition:var(--transition)}
.social-link:hover{background:var(--primary);border-color:var(--primary);transform:translateY(-2px)}
.contact-form{background:#fff;border-radius:var(--radius-lg);padding:40px;box-shadow:var(--shadow)}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-size:0.85rem;font-weight:600;color:var(--dark);margin-bottom:8px}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px 16px;border:1.5px solid var(--border);border-radius:var(--radius);font-size:0.95rem;color:var(--text);background:#fff;outline:none;transition:var(--transition);font-family:var(--font-main)}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(45,106,79,0.1)}
.form-group textarea{resize:vertical;min-height:120px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}

/* ===== 页脚 ===== */
.footer{background:var(--dark);color:rgba(255,255,255,0.7)}
.footer-top{padding:64px 0 48px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px}
.footer-brand .nav-logo{margin-bottom:16px}
.footer-brand p{font-size:0.9rem;line-height:1.8;margin-bottom:24px}
.footer-col h4{font-size:0.9rem;font-weight:700;color:#fff;margin-bottom:20px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:0.85rem;transition:var(--transition)}
.footer-col ul li a:hover{color:var(--primary-light)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding:24px 0}
.footer-bottom-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;font-size:0.82rem}
.footer-bottom-links{display:flex;gap:24px}
.footer-bottom-links a:hover{color:var(--primary-light)}

/* ===== 面包屑 ===== */
.breadcrumb{padding:16px 0;font-size:0.85rem;color:var(--text-muted)}
.breadcrumb a{color:var(--primary)}
.breadcrumb span{margin:0 8px}

/* ===== 内页头部 ===== */
.page-hero{background:linear-gradient(135deg,var(--primary),#1b4332);padding:80px 0;color:#fff;text-align:center}
.page-hero h1{font-size:clamp(1.8rem,3vw,2.8rem);font-weight:800;margin-bottom:16px}
.page-hero p{font-size:1.05rem;opacity:0.8;max-width:560px;margin:0 auto}

/* ===== 响应式 ===== */
@media(max-width:1024px){
  .hero-visual{display:none}
  .about-grid{grid-template-columns:1fr;gap:48px}
  .download-inner{grid-template-columns:1fr;gap:48px}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:768px){
  .section{padding:64px 0}
  .nav-links,.nav-right{display:none}
  .nav-toggle{display:flex}
  .nav-mobile{display:none;position:fixed;inset:0;top:72px;background:#fff;z-index:999;padding:24px;flex-direction:column;gap:8px;overflow-y:auto}
  .nav-mobile.open{display:flex}
  .nav-mobile a{padding:14px 16px;border-radius:var(--radius);font-size:1rem;color:var(--text);border-bottom:1px solid var(--border)}
  .videos-grid{grid-template-columns:1fr 1fr}
  .features-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .testimonials-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom-inner{flex-direction:column;text-align:center}
  .hero{min-height:auto;padding:80px 0 60px}
  .hero h1{font-size:2rem}
  .hero-stats{gap:20px}
  .form-row{grid-template-columns:1fr}
  .about-img-badge{right:0;bottom:-16px}
}
@media(max-width:480px){
  .videos-grid{grid-template-columns:1fr}
  .hero-actions{flex-direction:column;align-items:flex-start}
  .download-btns{flex-direction:column}
}

/* ===== 动画 ===== */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.animate-fade-up{animation:fadeInUp 0.7s ease both}
.animate-fade{animation:fadeIn 0.7s ease both}
.delay-1{animation-delay:0.1s}
.delay-2{animation-delay:0.2s}
.delay-3{animation-delay:0.3s}
.delay-4{animation-delay:0.4s}

/* ===== 视频模态框 ===== */
.video-modal{display:none;position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,0.85);align-items:center;justify-content:center;padding:24px}
.video-modal.open{display:flex}
.video-modal-inner{background:#000;border-radius:var(--radius-lg);overflow:hidden;width:100%;max-width:800px;position:relative}
.video-modal-close{position:absolute;top:16px;right:16px;width:36px;height:36px;background:rgba(255,255,255,0.2);border:none;border-radius:50%;color:#fff;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;z-index:1;transition:var(--transition)}
.video-modal-close:hover{background:rgba(255,255,255,0.4)}
.video-modal video{width:100%;display:block;max-height:60vh}
.video-modal-info{padding:20px;background:#111;color:#fff}
.video-modal-info h3{font-size:1rem;font-weight:700;margin-bottom:8px}
.video-modal-info p{font-size:0.85rem;color:rgba(255,255,255,0.6)}

/* ===== 搜索提示 ===== */
.search-tip{display:none;position:absolute;top:calc(100% + 8px);left:0;right:0;background:#fff;border:1.5px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);z-index:100;font-size:0.9rem;color:var(--text-muted)}
.search-wrap:focus-within .search-tip{display:block}