/* ============================================
   蘑菇视频 - 暖橘珊瑚原创主题样式
   LqvjLa.cn | 动漫影视创作社区
   ============================================ */

/* --- CSS变量 --- */
:root {
  --c-primary: #E11D48;
  --c-secondary: #1B2A4A;
  --c-accent: #F7C948;
  --c-bg: #0A0F1C;
  --c-card: #111827;
  --c-card2: #1A2332;
  --c-border: #2A3548;
  --c-text: #F0F4F8;
  --c-text2: #94A3B8;
  --c-glow: rgba(255,107,53,.35);
  --c-glow2: rgba(247,201,72,.25);
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,.4);
  --transition: .3s cubic-bezier(.4,0,.2,1);
  --container: 1200px;
}

/* --- Reset --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--c-bg);color:var(--c-text);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--c-primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--c-accent)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

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

/* --- 头部 --- */
.sv-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(10,15,28,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--c-border);transition:background var(--transition)}
.sv-header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.sv-logo img{height:36px;width:auto}
.sv-nav{display:flex;gap:8px}
.sv-nav-link{padding:8px 16px;border-radius:8px;font-size:.9rem;font-weight:500;color:var(--c-text2);transition:all var(--transition)}
.sv-nav-link:hover,.sv-nav-link.sv-active{color:var(--c-primary);background:rgba(255,107,53,.1)}
.sv-hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.sv-hamburger span{width:24px;height:2px;background:var(--c-text);border-radius:2px;transition:all var(--transition)}

/* --- 搜索框 --- */
.sv-search-bar{margin-top:64px;padding:18px 0;background:var(--c-card)}
.sv-search-wrap{display:flex;max-width:640px;margin:0 auto;border-radius:var(--radius);overflow:hidden;border:1px solid var(--c-border)}
.sv-search-input{flex:1;padding:12px 20px;background:var(--c-card2);border:none;color:var(--c-text);font-size:.95rem;outline:none}
.sv-search-input::placeholder{color:var(--c-text2)}
.sv-search-btn{padding:12px 28px;background:var(--c-primary);color:#fff;border:none;font-size:.95rem;font-weight:600;cursor:pointer;transition:background var(--transition)}
.sv-search-btn:hover{background:#e85a28}

/* --- 通用区块 --- */
.sv-section{padding:64px 0}
.sv-section-alt{background:var(--c-card)}
.sv-section-title{text-align:center;margin-bottom:48px}
.sv-section-title h2{font-size:1.8rem;font-weight:700;margin-bottom:8px}
.sv-section-title h2 em{font-style:normal;color:var(--c-primary)}
.sv-section-title p{color:var(--c-text2);font-size:1rem}

/* --- Banner --- */
.sv-banner{position:relative;overflow:hidden;border-radius:0 0 var(--radius) var(--radius)}
.sv-banner img{width:100%;height:400px;object-fit:cover}
.sv-banner-overlay{position:absolute;inset:0;background:linear-gradient(to right,rgba(10,15,28,.85) 0%,rgba(10,15,28,.4) 100%);display:flex;align-items:center;padding:0 60px}
.sv-banner-text h1{font-size:2.4rem;font-weight:800;margin-bottom:12px;line-height:1.3}
.sv-banner-text h1 em{font-style:normal;color:var(--c-primary)}
.sv-banner-text p{font-size:1.1rem;color:var(--c-text2);max-width:520px;margin-bottom:20px}
.sv-banner-text .sv-btn{display:inline-block;padding:12px 32px;background:var(--c-primary);color:#fff;border-radius:var(--radius);font-weight:600;transition:all var(--transition);box-shadow:0 4px 20px var(--c-glow)}
.sv-banner-text .sv-btn:hover{background:#e85a28;transform:translateY(-2px)}

/* --- 数据统计 --- */
.sv-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:40px 0}
.sv-stat-card{text-align:center;padding:28px 16px;background:var(--c-card2);border-radius:var(--radius);border:1px solid var(--c-border);transition:all var(--transition)}
.sv-stat-card:hover{border-color:var(--c-primary);box-shadow:0 0 20px var(--c-glow)}
.sv-stat-num{font-size:2rem;font-weight:800;color:var(--c-primary);display:block}
.sv-stat-label{color:var(--c-text2);font-size:.9rem;margin-top:4px}

/* --- 视频卡片网格 --- */
.sv-video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.sv-video-card{position:relative;border-radius:var(--radius);overflow:hidden;background:var(--c-card2);border:1px solid var(--c-border);transition:all var(--transition)}
.sv-video-card:hover{border-color:var(--c-primary);transform:translateY(-4px);box-shadow:0 8px 32px var(--c-glow)}
.sv-video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9}
.sv-video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition)}
.sv-video-card:hover .sv-video-thumb img{transform:scale(1.06)}
.sv-play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(10,15,28,.5);opacity:0;transition:opacity var(--transition)}
.sv-video-card:hover .sv-play-btn{opacity:1}
.sv-play-icon{width:56px;height:56px;background:var(--c-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px var(--c-glow)}
.sv-play-icon::after{content:'';display:block;width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:4px}
.sv-video-info{padding:16px}
.sv-video-info h3{font-size:1rem;font-weight:600;margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sv-video-meta{display:flex;gap:16px;color:var(--c-text2);font-size:.8rem}
.sv-video-tag{display:inline-block;padding:2px 10px;background:rgba(255,107,53,.12);color:var(--c-primary);border-radius:20px;font-size:.75rem;margin-top:8px}

/* --- 功能模块网格 --- */
.sv-feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.sv-feature-card{padding:32px 24px;background:var(--c-card2);border-radius:var(--radius);border:1px solid var(--c-border);transition:all var(--transition);text-align:center}
.sv-feature-card:hover{border-color:var(--c-accent);box-shadow:0 0 24px var(--c-glow2)}
.sv-feature-icon{font-size:2.4rem;margin-bottom:16px}
.sv-feature-card h3{font-size:1.1rem;font-weight:600;margin-bottom:8px}
.sv-feature-card p{color:var(--c-text2);font-size:.9rem;line-height:1.6}

/* --- 专家展示 --- */
.sv-expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.sv-expert-card{background:var(--c-card2);border-radius:var(--radius);border:1px solid var(--c-border);overflow:hidden;text-align:center;padding:32px 20px;transition:all var(--transition)}
.sv-expert-card:hover{border-color:var(--c-primary);box-shadow:0 8px 32px var(--c-glow)}
.sv-expert-avatar{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid var(--c-primary);box-shadow:0 0 16px var(--c-glow)}
.sv-expert-card h3{font-size:1.1rem;font-weight:600;margin-bottom:4px}
.sv-expert-card .sv-expert-role{color:var(--c-primary);font-size:.85rem;margin-bottom:12px}
.sv-expert-card p{color:var(--c-text2);font-size:.85rem;line-height:1.6;margin-bottom:16px}
.sv-expert-btns{display:flex;gap:10px;justify-content:center}
.sv-expert-btns a{padding:6px 18px;border-radius:20px;font-size:.8rem;font-weight:500;transition:all var(--transition)}
.sv-expert-btns .sv-btn-outline{border:1px solid var(--c-primary);color:var(--c-primary)}
.sv-expert-btns .sv-btn-outline:hover{background:var(--c-primary);color:#fff}
.sv-expert-btns .sv-btn-fill{background:var(--c-primary);color:#fff}
.sv-expert-btns .sv-btn-fill:hover{background:#e85a28}

/* --- 合作品牌墙 --- */
.sv-partner-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center}
.sv-partner-item{padding:16px 32px;background:var(--c-card2);border-radius:var(--radius);border:1px solid var(--c-border);color:var(--c-text2);font-weight:600;font-size:.95rem;transition:all var(--transition)}
.sv-partner-item:hover{border-color:var(--c-accent);color:var(--c-accent)}

/* --- How-To指南 --- */
.sv-howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.sv-howto-step{position:relative;padding:28px 20px 20px;background:var(--c-card2);border-radius:var(--radius);border:1px solid var(--c-border);text-align:center;counter-increment:step}
.sv-howto-step::before{content:counter(step);position:absolute;top:-16px;left:50%;transform:translateX(-50%);width:32px;height:32px;background:var(--c-primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;box-shadow:0 4px 12px var(--c-glow)}
.sv-howto-step h3{font-size:1rem;margin:12px 0 8px}
.sv-howto-step p{color:var(--c-text2);font-size:.85rem}

/* --- FAQ --- */
.sv-faq-list{max-width:800px;margin:0 auto}
.sv-faq-item{border:1px solid var(--c-border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;background:var(--c-card2)}
.sv-faq-q{padding:18px 24px;cursor:pointer;font-weight:600;display:flex;justify-content:space-between;align-items:center;transition:background var(--transition)}
.sv-faq-q:hover{background:rgba(255,107,53,.06)}
.sv-faq-q::after{content:'+';font-size:1.4rem;color:var(--c-primary);transition:transform var(--transition)}
.sv-faq-item.active .sv-faq-q::after{transform:rotate(45deg)}
.sv-faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s ease;color:var(--c-text2);font-size:.9rem;line-height:1.7}
.sv-faq-item.active .sv-faq-a{padding:0 24px 18px;max-height:300px}

/* --- 用户评论 --- */
.sv-review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.sv-review-card{padding:24px;background:var(--c-card2);border-radius:var(--radius);border:1px solid var(--c-border)}
.sv-review-stars{color:var(--c-accent);font-size:1rem;margin-bottom:10px}
.sv-review-card blockquote{color:var(--c-text2);font-size:.9rem;line-height:1.7;margin-bottom:14px;font-style:italic}
.sv-review-author{font-weight:600;font-size:.85rem;color:var(--c-primary)}

/* --- 标签云 --- */
.sv-tag-cloud{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.sv-tag{padding:6px 18px;background:var(--c-card2);border:1px solid var(--c-border);border-radius:20px;font-size:.85rem;color:var(--c-text2);transition:all var(--transition)}
.sv-tag:hover{border-color:var(--c-primary);color:var(--c-primary);background:rgba(255,107,53,.08)}

/* --- 联系我们 --- */
.sv-contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:32px}
.sv-contact-info{padding:32px;background:var(--c-card2);border-radius:var(--radius);border:1px solid var(--c-border)}
.sv-contact-info h3{font-size:1.2rem;margin-bottom:16px;color:var(--c-primary)}
.sv-contact-info p{color:var(--c-text2);margin-bottom:10px;font-size:.9rem}

/* --- 页脚 --- */
.sv-footer{background:var(--c-card);border-top:1px solid var(--c-border);padding:48px 0 24px}
.sv-footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:32px;margin-bottom:32px}
.sv-footer-logo{height:32px;width:auto;margin-bottom:12px}
.sv-footer-desc{color:var(--c-text2);font-size:.85rem;line-height:1.6}
.sv-footer-col h4{font-size:1rem;font-weight:600;margin-bottom:12px;color:var(--c-text)}
.sv-footer-col a{color:var(--c-text2);font-size:.85rem;line-height:2}
.sv-footer-col a:hover{color:var(--c-primary)}
.sv-footer-col p{color:var(--c-text2);font-size:.85rem;line-height:1.8}
.sv-footer-qr{display:flex;gap:16px}
.sv-footer-qr div{text-align:center}
.sv-footer-qr img{width:100px;height:100px;border-radius:8px;margin-bottom:6px}
.sv-footer-qr span{font-size:.75rem;color:var(--c-text2)}
.sv-footer-share{text-align:center;padding:16px 0;border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border);margin-bottom:20px}
.sv-footer-share span{color:var(--c-text2);margin-right:12px;font-size:.9rem}
.sv-footer-share a{display:inline-block;padding:6px 16px;margin:4px;background:var(--c-card2);border:1px solid var(--c-border);border-radius:20px;color:var(--c-text2);font-size:.8rem;transition:all var(--transition)}
.sv-footer-share a:hover{border-color:var(--c-primary);color:var(--c-primary)}
.sv-footer-bottom{text-align:center;color:var(--c-text2);font-size:.8rem}
.sv-footer-bottom p{margin-bottom:4px}

/* --- 面包屑 --- */
.sv-breadcrumb{padding:20px 0;font-size:.85rem;color:var(--c-text2)}
.sv-breadcrumb a{color:var(--c-text2)}
.sv-breadcrumb a:hover{color:var(--c-primary)}
.sv-breadcrumb span{margin:0 8px;opacity:.5}

/* --- 内页通用 --- */
.sv-page-hero{padding:40px 0;text-align:center;background:linear-gradient(135deg,var(--c-card) 0%,var(--c-card2) 100%)}
.sv-page-hero h1{font-size:2rem;font-weight:700;margin-bottom:8px}
.sv-page-hero h1 em{font-style:normal;color:var(--c-primary)}
.sv-page-hero p{color:var(--c-text2);font-size:1rem}
.sv-content{padding:48px 0}
.sv-content p{color:var(--c-text2);line-height:1.8;margin-bottom:16px;font-size:.95rem}
.sv-content h2{font-size:1.5rem;font-weight:700;margin:32px 0 16px;color:var(--c-text)}
.sv-content h2 em{font-style:normal;color:var(--c-primary)}
.sv-content h3{font-size:1.2rem;font-weight:600;margin:24px 0 12px}

/* --- 响应式 --- */
@media(max-width:992px){
  .sv-nav{display:none;position:absolute;top:64px;left:0;right:0;background:rgba(10,15,28,.98);flex-direction:column;padding:16px;border-bottom:1px solid var(--c-border)}
  .sv-nav.open{display:flex}
  .sv-hamburger{display:flex}
  .sv-video-grid,.sv-feature-grid,.sv-expert-grid,.sv-review-grid{grid-template-columns:repeat(2,1fr)}
  .sv-stats{grid-template-columns:repeat(2,1fr)}
  .sv-howto-steps{grid-template-columns:repeat(2,1fr)}
  .sv-footer-grid{grid-template-columns:repeat(2,1fr)}
  .sv-contact-grid{grid-template-columns:1fr}
  .sv-banner-text h1{font-size:1.8rem}
  .sv-banner img{height:300px}
  .sv-banner-overlay{padding:0 30px}
}
@media(max-width:640px){
  .sv-video-grid,.sv-feature-grid,.sv-expert-grid,.sv-review-grid{grid-template-columns:1fr}
  .sv-stats{grid-template-columns:repeat(2,1fr);gap:12px}
  .sv-howto-steps{grid-template-columns:1fr}
  .sv-footer-grid{grid-template-columns:1fr}
  .sv-section{padding:40px 0}
  .sv-section-title h2{font-size:1.4rem}
  .sv-banner-text h1{font-size:1.4rem}
  .sv-banner img{height:220px}
  .sv-banner-overlay{padding:0 20px}
  .sv-partner-wall{gap:10px}
  .sv-partner-item{padding:10px 18px;font-size:.8rem}
}