/* ============================================================
   每日大赛 - 全站样式表
   品牌: 每日大赛 | 域名: hskating.com
   主题: 旅行VLOG + 生活视频 | 配色: 青绿珊瑚渐变
   ============================================================ */

/* ---- CSS变量 ---- */
:root {
  --teal:        #00B4D8;
  --teal-dark:   #0077A8;
  --teal-light:  #90E0EF;
  --coral:       #FF6B6B;
  --coral-dark:  #E05252;
  --coral-light: #FFB3B3;
  --sand:        #FFF8F0;
  --charcoal:    #1A1A2E;
  --dark:        #16213E;
  --mid:         #0F3460;
  --gray-1:      #F7F9FC;
  --gray-2:      #EEF2F7;
  --gray-3:      #D1D9E6;
  --gray-4:      #8899AA;
  --text:        #2D3748;
  --text-light:  #718096;
  --white:       #FFFFFF;
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;
  --radius-xl:   32px;
  --shadow-sm:   0 2px 8px rgba(0,0,0,0.06);
  --shadow-md:   0 6px 24px rgba(0,0,0,0.10);
  --shadow-lg:   0 16px 48px rgba(0,0,0,0.14);
  --shadow-teal: 0 8px 24px rgba(0,180,216,0.28);
  --transition:  0.28s cubic-bezier(0.4,0,0.2,1);
  --font-main:   'PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
  --max-w:       1280px;
}

/* ---- 重置 ---- */
*,*::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(--white);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
button{cursor:pointer;border:none;background:none;font-family:inherit}
input,textarea,select{font-family:inherit}

/* ---- 公共工具 ---- */
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section-sm{padding:48px 0}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:2rem;font-weight:700;color:var(--charcoal);margin-bottom:10px;position:relative;display:inline-block}
.section-title h2::after{content:'';display:block;width:48px;height:4px;background:linear-gradient(90deg,var(--teal),var(--coral));border-radius:2px;margin:10px auto 0}
.section-title p{color:var(--text-light);font-size:1rem;max-width:560px;margin:0 auto}
.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:20px;font-size:0.72rem;font-weight:600;letter-spacing:.4px}
.badge-teal{background:rgba(0,180,216,0.12);color:var(--teal-dark)}
.badge-coral{background:rgba(255,107,107,0.12);color:var(--coral-dark)}
.badge-hot{background:linear-gradient(90deg,#FF6B6B,#FF8E53);color:#fff}
.badge-new{background:linear-gradient(90deg,#00B4D8,#48CAE4);color:#fff}
.tag{display:inline-block;padding:2px 8px;border-radius:4px;font-size:0.7rem;background:var(--gray-2);color:var(--text-light)}
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 24px;border-radius:var(--radius-xl);font-size:0.92rem;font-weight:600;transition:var(--transition);cursor:pointer}
.btn-primary{background:linear-gradient(135deg,var(--teal),var(--teal-dark));color:#fff;box-shadow:var(--shadow-teal)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(0,180,216,0.38)}
.btn-coral{background:linear-gradient(135deg,var(--coral),var(--coral-dark));color:#fff;box-shadow:0 8px 24px rgba(255,107,107,0.28)}
.btn-coral:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(255,107,107,0.38)}
.btn-outline{border:2px solid var(--teal);color:var(--teal);background:transparent}
.btn-outline:hover{background:var(--teal);color:#fff}
.btn-sm{padding:7px 16px;font-size:0.82rem}
.btn-lg{padding:14px 36px;font-size:1.05rem}
.text-teal{color:var(--teal)}
.text-coral{color:var(--coral)}
.text-light{color:var(--text-light)}
.fw-bold{font-weight:700}
.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}
.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}

/* ============================================================
   顶部公告栏
   ============================================================ */
.top-bar{background:linear-gradient(90deg,var(--teal-dark),var(--mid));color:rgba(255,255,255,0.9);font-size:0.8rem;padding:7px 0;text-align:center}
.top-bar a{color:var(--teal-light);font-weight:600;margin:0 4px}
.top-bar a:hover{color:#fff}

/* ============================================================
   导航栏
   ============================================================ */
.navbar{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,0.97);backdrop-filter:blur(12px);border-bottom:1px solid var(--gray-2);box-shadow:var(--shadow-sm)}
.navbar-inner{display:flex;align-items:center;gap:0;height:64px}
.navbar-brand{display:flex;align-items:center;gap:10px;flex-shrink:0;margin-right:28px}
.navbar-brand .brand-icon{width:40px;height:40px;border-radius:var(--radius-md);overflow:hidden;flex-shrink:0}
.navbar-brand .brand-icon img{width:100%;height:100%;object-fit:cover}
.navbar-brand .brand-name{font-size:1.15rem;font-weight:800;background:linear-gradient(135deg,var(--teal-dark),var(--coral));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;white-space:nowrap}
.navbar-nav{display:flex;align-items:center;gap:2px;flex:1}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:4px;padding:8px 12px;border-radius:var(--radius-sm);font-size:0.88rem;font-weight:500;color:var(--text);transition:var(--transition);white-space:nowrap}
.nav-link:hover,.nav-link.active{color:var(--teal);background:rgba(0,180,216,0.07)}
.nav-link .arrow{font-size:0.65rem;transition:var(--transition)}
.nav-item:hover .arrow{transform:rotate(180deg)}
.dropdown{position:absolute;top:calc(100% + 8px);left:0;min-width:160px;background:#fff;border-radius:var(--radius-md);box-shadow:var(--shadow-lg);border:1px solid var(--gray-2);opacity:0;visibility:hidden;transform:translateY(-8px);transition:var(--transition);z-index:100}
.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{display:block;padding:9px 16px;font-size:0.85rem;color:var(--text);transition:var(--transition)}
.dropdown a:hover{color:var(--teal);background:var(--gray-1);padding-left:20px}
.navbar-right{display:flex;align-items:center;gap:10px;margin-left:auto;flex-shrink:0}
.search-wrap{position:relative}
.search-wrap input{width:180px;padding:7px 36px 7px 14px;border:1.5px solid var(--gray-3);border-radius:var(--radius-xl);font-size:0.83rem;color:var(--text);background:var(--gray-1);transition:var(--transition);outline:none}
.search-wrap input:focus{border-color:var(--teal);background:#fff;width:220px;box-shadow:0 0 0 3px rgba(0,180,216,0.12)}
.search-wrap .search-btn{position:absolute;right:10px;top:50%;transform:translateY(-50%);color:var(--gray-4);font-size:0.9rem;background:none;border:none;cursor:pointer;transition:var(--transition)}
.search-wrap .search-btn:hover{color:var(--teal)}
.hamburger{display:none;flex-direction:column;gap:5px;padding:6px;cursor:pointer}
.hamburger span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}

/* ============================================================
   搜索栏（导航下方）
   ============================================================ */
.search-bar-section{background:linear-gradient(135deg,var(--teal-dark) 0%,var(--mid) 100%);padding:16px 0}
.search-bar-inner{display:flex;align-items:center;gap:12px;max-width:760px;margin:0 auto;padding:0 20px}
.search-bar-inner .search-input{flex:1;padding:12px 20px;border-radius:var(--radius-xl);border:none;font-size:0.95rem;outline:none;background:#fff;color:var(--text)}
.search-bar-inner .search-input::placeholder{color:var(--gray-4)}
.search-bar-inner .search-submit{padding:12px 28px;background:linear-gradient(135deg,var(--coral),var(--coral-dark));color:#fff;border-radius:var(--radius-xl);font-weight:700;font-size:0.92rem;border:none;cursor:pointer;transition:var(--transition);white-space:nowrap}
.search-bar-inner .search-submit:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(255,107,107,0.4)}
.search-hot-tags{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:8px 20px 0;max-width:760px;margin:0 auto}
.search-hot-tags span{font-size:0.78rem;color:rgba(255,255,255,0.7)}
.search-hot-tags a{font-size:0.78rem;color:rgba(255,255,255,0.9);padding:2px 10px;border:1px solid rgba(255,255,255,0.3);border-radius:12px;transition:var(--transition)}
.search-hot-tags a:hover{background:rgba(255,255,255,0.15);color:#fff}

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb{padding:10px 0;font-size:0.82rem;color:var(--text-light)}
.breadcrumb a{color:var(--text-light);transition:var(--transition)}
.breadcrumb a:hover{color:var(--teal)}
.breadcrumb span{margin:0 6px;color:var(--gray-3)}

/* ============================================================
   Hero区域 - 全屏分屏布局
   ============================================================ */
.hero{position:relative;min-height:580px;display:flex;align-items:center;overflow:hidden;background:linear-gradient(135deg,var(--charcoal) 0%,var(--dark) 40%,var(--mid) 100%)}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:0.35}
.hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(26,26,46,0.85) 0%,rgba(15,52,96,0.6) 60%,transparent 100%)}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:60px 0}
.hero-content{}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(0,180,216,0.18);border:1px solid rgba(0,180,216,0.35);border-radius:20px;padding:5px 14px;font-size:0.78rem;color:var(--teal-light);font-weight:600;margin-bottom:20px;letter-spacing:.5px}
.hero-eyebrow::before{content:'🏆';font-size:0.85rem}
.hero h1{font-size:3rem;font-weight:800;color:#fff;line-height:1.2;margin-bottom:16px}
.hero h1 .highlight{background:linear-gradient(135deg,var(--teal-light),var(--coral-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:1rem;color:rgba(255,255,255,0.75);margin-bottom:28px;max-width:480px;line-height:1.8}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:36px}
.hero-stats{display:flex;gap:28px}
.hero-stat{text-align:center}
.hero-stat .num{font-size:1.5rem;font-weight:800;color:#fff;display:block}
.hero-stat .num span{background:linear-gradient(135deg,var(--teal-light),var(--coral-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-stat .label{font-size:0.72rem;color:rgba(255,255,255,0.6);display:block;margin-top:2px}
.hero-video-preview{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);aspect-ratio:16/9;background:var(--charcoal)}
.hero-video-preview img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.hero-video-preview:hover img{transform:scale(1.04)}
.hero-play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0.25);transition:var(--transition)}
.hero-play-btn:hover{background:rgba(0,0,0,0.35)}
.hero-play-btn .play-circle{width:64px;height:64px;background:rgba(255,255,255,0.92);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:var(--transition)}
.hero-play-btn:hover .play-circle{transform:scale(1.1);background:#fff}
.hero-play-btn .play-circle::after{content:'';border-style:solid;border-width:12px 0 12px 22px;border-color:transparent transparent transparent var(--teal-dark);margin-left:4px}
.hero-video-info{position:absolute;bottom:0;left:0;right:0;padding:16px;background:linear-gradient(transparent,rgba(0,0,0,0.7))}
.hero-video-info h3{font-size:0.9rem;color:#fff;font-weight:600}
.hero-video-info p{font-size:0.75rem;color:rgba(255,255,255,0.7)}

/* ============================================================
   分类导航标签
   ============================================================ */
.cat-nav{background:var(--gray-1);border-bottom:1px solid var(--gray-2);padding:0}
.cat-nav-inner{display:flex;align-items:center;gap:4px;overflow-x:auto;padding:12px 0;scrollbar-width:none}
.cat-nav-inner::-webkit-scrollbar{display:none}
.cat-btn{display:flex;align-items:center;gap:6px;padding:7px 16px;border-radius:var(--radius-xl);font-size:0.83rem;font-weight:500;color:var(--text-light);background:transparent;border:1.5px solid transparent;white-space:nowrap;transition:var(--transition);cursor:pointer}
.cat-btn:hover{color:var(--teal);background:rgba(0,180,216,0.07);border-color:rgba(0,180,216,0.2)}
.cat-btn.active{color:var(--teal-dark);background:rgba(0,180,216,0.1);border-color:var(--teal);font-weight:600}
.cat-btn .cat-icon{font-size:1rem}

/* ============================================================
   视频卡片网格
   ============================================================ */
.video-section{background:var(--white)}
.video-section-alt{background:var(--gray-1)}
.video-grid{display:grid;gap:20px}
.video-grid-4{grid-template-columns:repeat(4,1fr)}
.video-grid-3{grid-template-columns:repeat(3,1fr)}
.video-grid-2{grid-template-columns:repeat(2,1fr)}

/* 视频卡片 */
.video-card{background:#fff;border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);transition:var(--transition);border:1px solid var(--gray-2)}
.video-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-light)}
.video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--gray-2)}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.video-card:hover .video-thumb img{transform:scale(1.06)}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.72);color:#fff;font-size:0.72rem;padding:2px 7px;border-radius:4px;font-weight:600}
.video-play-overlay{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-overlay{background:rgba(0,0,0,0.28);opacity:1}
.video-play-overlay .play-btn{width:52px;height:52px;background:rgba(255,255,255,0.92);border-radius:50%;display:flex;align-items:center;justify-content:center;transform:scale(0.8);transition:var(--transition)}
.video-card:hover .video-play-overlay .play-btn{transform:scale(1)}
.video-play-overlay .play-btn::after{content:'';border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent var(--teal-dark);margin-left:3px}
.video-badge{position:absolute;top:8px;left:8px}
.video-body{padding:12px}
.video-title{font-size:0.88rem;font-weight:600;color:var(--text);margin-bottom:6px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;justify-content:space-between;font-size:0.75rem;color:var(--text-light)}
.video-author{display:flex;align-items:center;gap:5px}
.video-author .avatar{width:20px;height:20px;border-radius:50%;background:linear-gradient(135deg,var(--teal),var(--coral));display:flex;align-items:center;justify-content:center;font-size:0.65rem;color:#fff;font-weight:700;flex-shrink:0}
.video-stats{display:flex;gap:8px;font-size:0.72rem;color:var(--text-light);margin-top:6px}
.video-stats span{display:flex;align-items:center;gap:2px}
.video-tags{display:flex;gap:4px;flex-wrap:wrap;margin-top:7px}

/* 大卡片（精选） */
.video-card-featured{display:grid;grid-template-columns:1.8fr 1fr;gap:0;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);border:1px solid var(--gray-2);background:#fff;transition:var(--transition)}
.video-card-featured:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.video-card-featured .video-thumb{aspect-ratio:auto;height:100%;min-height:240px}
.video-card-featured .video-body{padding:24px;display:flex;flex-direction:column;justify-content:space-between}
.video-card-featured .video-title{font-size:1.1rem;-webkit-line-clamp:3}
.video-card-featured .video-desc{font-size:0.85rem;color:var(--text-light);margin:8px 0;line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* ============================================================
   精选专区（横向滚动）
   ============================================================ */
.scroll-row{display:flex;gap:16px;overflow-x:auto;padding-bottom:8px;scrollbar-width:thin;scrollbar-color:var(--gray-3) transparent}
.scroll-row::-webkit-scrollbar{height:4px}
.scroll-row::-webkit-scrollbar-track{background:transparent}
.scroll-row::-webkit-scrollbar-thumb{background:var(--gray-3);border-radius:2px}
.scroll-row .video-card{min-width:240px;flex-shrink:0}

/* ============================================================
   功能特性区
   ============================================================ */
.features-section{background:linear-gradient(135deg,var(--charcoal),var(--dark))}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.1);border-radius:var(--radius-lg);padding:28px 24px;transition:var(--transition);position:relative;overflow:hidden}
.feature-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--teal),var(--coral));transform:scaleX(0);transform-origin:left;transition:var(--transition)}
.feature-card:hover{background:rgba(255,255,255,0.08);transform:translateY(-4px)}
.feature-card:hover::before{transform:scaleX(1)}
.feature-icon{width:52px;height:52px;border-radius:var(--radius-md);background:linear-gradient(135deg,rgba(0,180,216,0.2),rgba(255,107,107,0.2));display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px}
.feature-card h3{font-size:1rem;font-weight:700;color:#fff;margin-bottom:8px}
.feature-card p{font-size:0.85rem;color:rgba(255,255,255,0.65);line-height:1.7}

/* ============================================================
   数据统计区
   ============================================================ */
.stats-strip{background:linear-gradient(135deg,var(--teal-dark),var(--mid));padding:40px 0}
.stats-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;text-align:center}
.stat-item .num{font-size:1.8rem;font-weight:800;color:#fff;display:block;line-height:1}
.stat-item .num em{font-style:normal;font-size:1.1rem;color:var(--teal-light)}
.stat-item .label{font-size:0.75rem;color:rgba(255,255,255,0.65);margin-top:4px;display:block}

/* ============================================================
   专家展示
   ============================================================ */
.experts-section{background:var(--gray-1)}
.experts-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.expert-card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);transition:var(--transition);border:1px solid var(--gray-2)}
.expert-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.expert-photo{position:relative;overflow:hidden;aspect-ratio:1}
.expert-photo img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.expert-card:hover .expert-photo img{transform:scale(1.06)}
.expert-overlay{position:absolute;inset:0;background:linear-gradient(transparent 40%,rgba(0,0,0,0.7));display:flex;align-items:flex-end;padding:16px;opacity:0;transition:var(--transition)}
.expert-card:hover .expert-overlay{opacity:1}
.expert-overlay .expert-actions{display:flex;gap:8px;width:100%}
.expert-overlay .expert-actions a{flex:1;text-align:center;padding:7px;background:rgba(255,255,255,0.15);border:1px solid rgba(255,255,255,0.3);border-radius:var(--radius-sm);font-size:0.75rem;color:#fff;transition:var(--transition);backdrop-filter:blur(4px)}
.expert-overlay .expert-actions a:hover{background:var(--teal);border-color:var(--teal)}
.expert-info{padding:16px}
.expert-info h3{font-size:0.95rem;font-weight:700;color:var(--text);margin-bottom:4px}
.expert-info .role{font-size:0.78rem;color:var(--teal);font-weight:600;margin-bottom:6px}
.expert-info p{font-size:0.78rem;color:var(--text-light);line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.expert-awards{display:flex;gap:4px;flex-wrap:wrap;margin-top:8px}
.expert-awards span{font-size:0.68rem;padding:2px 7px;border-radius:10px;background:rgba(0,180,216,0.1);color:var(--teal-dark)}

/* ============================================================
   用户评价
   ============================================================ */
.reviews-section{background:var(--white)}
.reviews-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.review-card{background:var(--gray-1);border-radius:var(--radius-lg);padding:20px;border:1px solid var(--gray-2);transition:var(--transition);position:relative}
.review-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--teal-light)}
.review-card::before{content:'"';position:absolute;top:12px;right:16px;font-size:3rem;color:var(--teal-light);font-family:Georgia,serif;line-height:1;opacity:0.5}
.review-stars{color:#FFB800;font-size:0.85rem;margin-bottom:8px;letter-spacing:1px}
.review-text{font-size:0.85rem;color:var(--text);line-height:1.7;margin-bottom:14px}
.review-user{display:flex;align-items:center;gap:10px}
.review-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--teal),var(--coral));display:flex;align-items:center;justify-content:center;font-size:0.85rem;color:#fff;font-weight:700;flex-shrink:0}
.review-user-info .name{font-size:0.82rem;font-weight:600;color:var(--text)}
.review-user-info .meta{font-size:0.72rem;color:var(--text-light)}

/* ============================================================
   FAQ
   ============================================================ */
.faq-section{background:var(--gray-1)}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;max-width:900px;margin:0 auto}
.faq-item{background:#fff;border-radius:var(--radius-md);border:1px solid var(--gray-2);overflow:hidden;transition:var(--transition)}
.faq-item:hover{border-color:var(--teal-light)}
.faq-q{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;cursor:pointer;font-size:0.9rem;font-weight:600;color:var(--text);gap:12px;user-select:none}
.faq-q .icon{width:24px;height:24px;border-radius:50%;background:rgba(0,180,216,0.1);color:var(--teal);display:flex;align-items:center;justify-content:center;font-size:1rem;flex-shrink:0;transition:var(--transition)}
.faq-item.open .faq-q .icon{transform:rotate(45deg);background:var(--teal);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height 0.35s ease,padding 0.35s ease}
.faq-item.open .faq-a{max-height:300px}
.faq-a-inner{padding:0 20px 16px;font-size:0.85rem;color:var(--text-light);line-height:1.8;border-top:1px solid var(--gray-2)}

/* ============================================================
   合作伙伴
   ============================================================ */
.partners-section{background:var(--white)}
.partners-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.partner-item{background:var(--gray-1);border-radius:var(--radius-md);padding:16px 12px;text-align:center;border:1px solid var(--gray-2);transition:var(--transition)}
.partner-item:hover{border-color:var(--teal);background:rgba(0,180,216,0.04);transform:translateY(-2px)}
.partner-item .icon{font-size:1.8rem;margin-bottom:6px}
.partner-item .name{font-size:0.72rem;color:var(--text-light);font-weight:500}

/* ============================================================
   CTA区域
   ============================================================ */
.cta-section{background:linear-gradient(135deg,var(--teal-dark) 0%,var(--mid) 50%,var(--coral-dark) 100%);padding:72px 0;text-align:center;position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;top:-50%;left:-20%;width:60%;height:200%;background:radial-gradient(circle,rgba(255,255,255,0.06) 0%,transparent 70%)}
.cta-section h2{font-size:2.2rem;font-weight:800;color:#fff;margin-bottom:12px}
.cta-section p{font-size:1rem;color:rgba(255,255,255,0.8);margin-bottom:28px;max-width:520px;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn-white{background:#fff;color:var(--teal-dark);font-weight:700}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(0,0,0,0.2)}
.btn-ghost{border:2px solid rgba(255,255,255,0.6);color:#fff;background:transparent}
.btn-ghost:hover{background:rgba(255,255,255,0.15);border-color:#fff}

/* ============================================================
   社交分享
   ============================================================ */
.social-share{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.social-share span{font-size:0.82rem;color:var(--text-light)}
.share-btn{display:inline-flex;align-items:center;gap:5px;padding:6px 14px;border-radius:var(--radius-xl);font-size:0.78rem;font-weight:600;transition:var(--transition);border:1.5px solid var(--gray-3);color:var(--text-light)}
.share-btn:hover{border-color:var(--teal);color:var(--teal);background:rgba(0,180,216,0.05)}

/* ============================================================
   页脚
   ============================================================ */
.footer{background:var(--charcoal);color:rgba(255,255,255,0.8);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:32px;margin-bottom:40px}
.footer-brand .logo-wrap{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .logo-wrap img{width:40px;height:40px;border-radius:var(--radius-md)}
.footer-brand .logo-wrap span{font-size:1.1rem;font-weight:800;background:linear-gradient(135deg,var(--teal-light),var(--coral-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.footer-brand p{font-size:0.82rem;color:rgba(255,255,255,0.55);line-height:1.8;margin-bottom:16px}
.footer-qr{display:flex;gap:16px;margin-top:8px}
.footer-qr-item{text-align:center}
.footer-qr-item img{width:72px;height:72px;border-radius:var(--radius-sm);background:#fff;padding:4px}
.footer-qr-item span{display:block;font-size:0.68rem;color:rgba(255,255,255,0.5);margin-top:4px}
.footer-col h4{font-size:0.88rem;font-weight:700;color:#fff;margin-bottom:14px;padding-bottom:8px;border-bottom:1px solid rgba(255,255,255,0.1)}
.footer-col ul li{margin-bottom:8px}
.footer-col ul li a{font-size:0.82rem;color:rgba(255,255,255,0.55);transition:var(--transition)}
.footer-col ul li a:hover{color:var(--teal-light);padding-left:4px}
.footer-contact-item{display:flex;align-items:center;gap:8px;font-size:0.8rem;color:rgba(255,255,255,0.55);margin-bottom:8px}
.footer-contact-item .ico{color:var(--teal-light);font-size:0.9rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding:18px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:gap;gap:12px}
.footer-bottom p{font-size:0.78rem;color:rgba(255,255,255,0.4)}
.footer-bottom a{color:rgba(255,255,255,0.4);transition:var(--transition)}
.footer-bottom a:hover{color:var(--teal-light)}
.footer-bottom-links{display:flex;gap:16px}
.footer-social{display:flex;gap:8px}
.footer-social a{width:32px;height:32px;border-radius:50%;background:rgba(255,255,255,0.08);display:flex;align-items:center;justify-content:center;font-size:0.8rem;color:rgba(255,255,255,0.6);transition:var(--transition)}
.footer-social a:hover{background:var(--teal);color:#fff}

/* ============================================================
   浮动广告
   ============================================================ */
.float-ad{position:fixed;bottom:24px;right:24px;z-index:9999;background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:16px 20px;max-width:280px;border:1px solid var(--gray-2);transform:translateX(120%);transition:transform 0.5s cubic-bezier(0.34,1.56,0.64,1);display:none}
.float-ad.show{transform:translateX(0)}
.float-ad-close{position:absolute;top:8px;right:10px;font-size:1.1rem;color:var(--gray-4);cursor:pointer;line-height:1;transition:var(--transition)}
.float-ad-close:hover{color:var(--coral)}
.float-ad h4{font-size:0.88rem;font-weight:700;color:var(--text);margin-bottom:6px;padding-right:16px}
.float-ad p{font-size:0.78rem;color:var(--text-light);margin-bottom:12px}
.float-ad .float-ad-btn{display:block;text-align:center;padding:8px;background:linear-gradient(135deg,var(--teal),var(--coral));color:#fff;border-radius:var(--radius-xl);font-size:0.82rem;font-weight:700;transition:var(--transition)}
.float-ad .float-ad-btn:hover{opacity:0.9;transform:scale(1.02)}

/* ============================================================
   内页 Hero
   ============================================================ */
.page-hero{background:linear-gradient(135deg,var(--charcoal),var(--dark),var(--mid));padding:56px 0;text-align:center}
.page-hero h1{font-size:2.2rem;font-weight:800;color:#fff;margin-bottom:10px}
.page-hero h1 .hl{background:linear-gradient(135deg,var(--teal-light),var(--coral-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.page-hero p{font-size:0.95rem;color:rgba(255,255,255,0.7);max-width:560px;margin:0 auto}

/* ============================================================
   分页
   ============================================================ */
.pagination{display:flex;align-items:center;justify-content:center;gap:6px;padding:32px 0 0}
.pagination a,.pagination span{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--radius-sm);font-size:0.85rem;border:1.5px solid var(--gray-3);color:var(--text-light);transition:var(--transition)}
.pagination a:hover{border-color:var(--teal);color:var(--teal)}
.pagination .active{background:var(--teal);border-color:var(--teal);color:#fff;font-weight:700}
.pagination .dots{border:none;color:var(--gray-4)}

/* ============================================================
   工具卡片
   ============================================================ */
.tool-card{background:#fff;border-radius:var(--radius-lg);padding:24px;border:1px solid var(--gray-2);transition:var(--transition);display:flex;gap:16px;align-items:flex-start}
.tool-card:hover{border-color:var(--teal);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.tool-icon{width:48px;height:48px;border-radius:var(--radius-md);background:linear-gradient(135deg,rgba(0,180,216,0.15),rgba(255,107,107,0.15));display:flex;align-items:center;justify-content:center;font-size:1.4rem;flex-shrink:0}
.tool-info h3{font-size:0.95rem;font-weight:700;color:var(--text);margin-bottom:4px}
.tool-info p{font-size:0.82rem;color:var(--text-light);line-height:1.6}
.tool-info .tool-tags{display:flex;gap:4px;flex-wrap:wrap;margin-top:8px}

/* ============================================================
   关于页时间线
   ============================================================ */
.timeline{position:relative;padding-left:32px}
.timeline::before{content:'';position:absolute;left:10px;top:0;bottom:0;width:2px;background:linear-gradient(var(--teal),var(--coral))}
.timeline-item{position:relative;margin-bottom:28px}
.timeline-item::before{content:'';position:absolute;left:-26px;top:4px;width:12px;height:12px;border-radius:50%;background:var(--teal);border:2px solid #fff;box-shadow:0 0 0 3px rgba(0,180,216,0.2)}
.timeline-item .year{font-size:0.78rem;font-weight:700;color:var(--teal);margin-bottom:4px}
.timeline-item h3{font-size:0.92rem;font-weight:700;color:var(--text);margin-bottom:4px}
.timeline-item p{font-size:0.82rem;color:var(--text-light);line-height:1.7}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1200px){
  .video-grid-4{grid-template-columns:repeat(3,1fr)}
  .experts-grid{grid-template-columns:repeat(3,1fr)}
  .stats-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}
}
@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero-video-preview{max-width:560px;margin:0 auto}
  .hero h1{font-size:2.2rem}
  .video-grid-4,.video-grid-3{grid-template-columns:repeat(2,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .experts-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .faq-grid{grid-template-columns:1fr}
  .partners-grid{grid-template-columns:repeat(4,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .navbar-nav{display:none}
  .hamburger{display:flex}
  .search-wrap{display:none}
  .video-card-featured{grid-template-columns:1fr}
  .video-card-featured .video-thumb{min-height:200px}
}
@media (max-width:640px){
  :root{--max-w:100%}
  .section{padding:48px 0}
  .hero{min-height:auto}
  .hero-inner{padding:40px 0}
  .hero h1{font-size:1.7rem}
  .hero-stats{gap:16px}
  .hero-stat .num{font-size:1.2rem}
  .video-grid-4,.video-grid-3,.video-grid-2{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr}
  .experts-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .partners-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .cta-section h2{font-size:1.6rem}
  .page-hero h1{font-size:1.6rem}
  .section-title h2{font-size:1.5rem}
  .float-ad{right:12px;bottom:12px;max-width:240px}
}

/* ============================================================
   移动端菜单
   ============================================================ */
.mobile-menu{display:none;position:fixed;inset:0;z-index:2000;background:rgba(0,0,0,0.5)}
.mobile-menu.open{display:block}
.mobile-menu-panel{position:absolute;top:0;left:0;width:280px;height:100%;background:#fff;overflow-y:auto;transform:translateX(-100%);transition:transform 0.3s ease}
.mobile-menu.open .mobile-menu-panel{transform:translateX(0)}
.mobile-menu-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--gray-2)}
.mobile-menu-close{font-size:1.4rem;color:var(--text-light);cursor:pointer}
.mobile-nav-list a{display:block;padding:12px 20px;font-size:0.92rem;color:var(--text);border-bottom:1px solid var(--gray-1);transition:var(--transition)}
.mobile-nav-list a:hover{color:var(--teal);background:var(--gray-1);padding-left:28px}
.mobile-search{padding:16px 20px;border-bottom:1px solid var(--gray-2)}
.mobile-search input{width:100%;padding:10px 16px;border:1.5px solid var(--gray-3);border-radius:var(--radius-xl);font-size:0.88rem;outline:none}
.mobile-search input:focus{border-color:var(--teal)}