/* ============================================================
   草莓视频 - 主样式文件
   域名: y71pbk.cn
   原创配色方案：暗夜极光主题
   主色: #0ff / 青蓝  辅色: #b44fff / 紫  强调: #ff6b35 / 橙
   ============================================================ */

/* ---- CSS变量 ---- */
:root {
  --clr-bg:        #0a0b14;
  --clr-bg2:       #0f1020;
  --clr-bg3:       #141628;
  --clr-card:      #181a2e;
  --clr-border:    rgba(0,255,255,0.12);
  --clr-primary:   #00d4ff;
  --clr-primary2:  #0099cc;
  --clr-accent:    #b44fff;
  --clr-accent2:   #7b2fff;
  --clr-hot:       #ff6b35;
  --clr-hot2:      #ff3d00;
  --clr-text:      #e8eaf6;
  --clr-text2:     #9ca3c0;
  --clr-text3:     #5a6080;
  --clr-gold:      #ffd700;
  --shadow-card:   0 4px 24px rgba(0,212,255,0.08);
  --shadow-hover:  0 8px 40px rgba(0,212,255,0.22);
  --shadow-glow:   0 0 20px rgba(0,212,255,0.35);
  --radius:        12px;
  --radius-lg:     20px;
  --radius-xl:     28px;
  --trans:         all 0.3s cubic-bezier(.4,0,.2,1);
  --font:          'PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
}

/* ---- 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(--clr-text);background:var(--clr-bg);line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none;transition:var(--trans)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
button{cursor:pointer;border:none;background:none;font-family:var(--font)}
input,textarea,select{font-family:var(--font)}

/* ---- 滚动条 ---- */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--clr-bg)}
::-webkit-scrollbar-thumb{background:var(--clr-primary2);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--clr-primary)}

/* ---- 工具类 ---- */
.container{max-width:1240px;margin:0 auto;padding:0 20px}
.section{padding:80px 0}
.section-sm{padding:50px 0}
.text-center{text-align:center}
.text-primary{color:var(--clr-primary)}
.text-accent{color:var(--clr-accent)}
.text-hot{color:var(--clr-hot)}
.hidden{display:none}
.flex{display:flex}
.flex-center{display:flex;align-items:center;justify-content:center}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

/* ---- 标题 ---- */
.section-title{font-size:1.9rem;font-weight:800;color:var(--clr-text);margin-bottom:10px;letter-spacing:-0.5px}
.section-title span{color:var(--clr-primary)}
.section-title .hot{color:var(--clr-hot)}
.section-sub{font-size:0.95rem;color:var(--clr-text2);margin-bottom:44px}
.section-hd{text-align:center;margin-bottom:44px}
.section-hd::after{content:'';display:block;width:56px;height:3px;background:linear-gradient(90deg,var(--clr-primary),var(--clr-accent));border-radius:2px;margin:14px auto 0}

/* ---- 按钮 ---- */
.btn{display:inline-flex;align-items:center;gap:7px;padding:11px 26px;border-radius:50px;font-size:0.92rem;font-weight:600;transition:var(--trans);cursor:pointer;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--clr-primary),var(--clr-primary2));color:#0a0b14;box-shadow:0 4px 18px rgba(0,212,255,0.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-glow);color:#0a0b14}
.btn-accent{background:linear-gradient(135deg,var(--clr-accent),var(--clr-accent2));color:#fff;box-shadow:0 4px 18px rgba(180,79,255,0.35)}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 0 20px rgba(180,79,255,0.5);color:#fff}
.btn-hot{background:linear-gradient(135deg,var(--clr-hot),var(--clr-hot2));color:#fff;box-shadow:0 4px 18px rgba(255,107,53,0.35)}
.btn-hot:hover{transform:translateY(-2px);color:#fff}
.btn-outline{border:1.5px solid var(--clr-primary);color:var(--clr-primary);background:transparent}
.btn-outline:hover{background:var(--clr-primary);color:#0a0b14}
.btn-ghost{border:1.5px solid rgba(255,255,255,0.2);color:rgba(255,255,255,0.8);background:transparent}
.btn-ghost:hover{border-color:var(--clr-primary);color:var(--clr-primary)}
.btn-sm{padding:7px 16px;font-size:0.82rem}
.btn-lg{padding:14px 36px;font-size:1rem}

/* ---- 顶部公告栏 ---- */
.topbar{background:linear-gradient(90deg,#050810,#0d0f1e,#050810);border-bottom:1px solid var(--clr-border);padding:7px 0;font-size:0.8rem;color:var(--clr-text2)}
.topbar .container{display:flex;justify-content:space-between;align-items:center}
.topbar-marquee{flex:1;overflow:hidden;white-space:nowrap}
.topbar-marquee span{display:inline-block;animation:marquee 28s linear infinite}
@keyframes marquee{0%{transform:translateX(100%)}100%{transform:translateX(-100%)}}
.topbar-links a{color:var(--clr-text3);margin-left:14px;font-size:0.78rem;transition:var(--trans)}
.topbar-links a:hover{color:var(--clr-primary)}

/* ---- 导航 ---- */
.header{position:sticky;top:0;z-index:1000;background:rgba(10,11,20,0.95);backdrop-filter:blur(14px);border-bottom:1px solid var(--clr-border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:66px;gap:16px}
.logo-wrap{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-img{width:40px;height:40px;border-radius:10px;object-fit:cover}
.logo-text{font-size:1.35rem;font-weight:900;letter-spacing:-0.5px}
.logo-text .t1{color:var(--clr-primary)}
.logo-text .t2{color:var(--clr-accent)}
.logo-sub{font-size:0.65rem;color:var(--clr-text3);display:block;margin-top:-3px}
.nav{display:flex;align-items:center;gap:2px}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:4px;padding:8px 13px;border-radius:8px;font-size:0.9rem;font-weight:500;color:var(--clr-text2);transition:var(--trans);white-space:nowrap}
.nav-link:hover,.nav-link.active{color:var(--clr-primary);background:rgba(0,212,255,0.08)}
.nav-link .arr{font-size:0.65rem;transition:var(--trans)}
.nav-item:hover .arr{transform:rotate(180deg)}
.dropdown{position:absolute;top:calc(100%+8px);left:0;min-width:170px;background:var(--clr-bg3);border-radius:var(--radius);box-shadow:0 8px 32px rgba(0,0,0,0.5);border:1px solid var(--clr-border);opacity:0;visibility:hidden;transform:translateY(-8px);transition:var(--trans);z-index:100}
.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{display:block;padding:9px 16px;font-size:0.86rem;color:var(--clr-text2);border-bottom:1px solid rgba(255,255,255,0.04)}
.dropdown a:last-child{border-bottom:none}
.dropdown a:hover{color:var(--clr-primary);background:rgba(0,212,255,0.06)}
.header-right{display:flex;align-items:center;gap:10px}
.mobile-btn{display:none;flex-direction:column;gap:5px;padding:6px;cursor:pointer}
.mobile-btn span{display:block;width:22px;height:2px;background:var(--clr-text2);border-radius:2px;transition:var(--trans)}

/* ---- 搜索导航条 ---- */
.search-nav{background:linear-gradient(90deg,var(--clr-bg2),var(--clr-bg3),var(--clr-bg2));border-bottom:2px solid rgba(0,212,255,0.2);padding:12px 0}
.search-nav .container{display:flex;align-items:center;gap:16px}
.search-box{flex:1;max-width:560px;position:relative}
.search-inner{display:flex;align-items:center;background:rgba(255,255,255,0.06);border:1.5px solid rgba(0,212,255,0.2);border-radius:50px;padding:9px 18px;gap:10px;transition:var(--trans)}
.search-inner:focus-within{border-color:var(--clr-primary);background:rgba(0,212,255,0.05);box-shadow:0 0 0 3px rgba(0,212,255,0.1)}
.search-inner input{border:none;background:none;outline:none;color:var(--clr-text);font-size:0.9rem;width:100%}
.search-inner input::placeholder{color:var(--clr-text3)}
.search-inner .s-icon{color:var(--clr-text3);font-size:1rem}
.search-inner .s-btn{color:var(--clr-primary);font-size:0.82rem;font-weight:600;padding:4px 12px;background:rgba(0,212,255,0.12);border-radius:50px;transition:var(--trans)}
.search-inner .s-btn:hover{background:var(--clr-primary);color:#0a0b14}
.search-tip{position:absolute;top:calc(100%+6px);left:0;right:0;background:var(--clr-bg3);border-radius:var(--radius);box-shadow:0 8px 24px rgba(0,0,0,0.4);border:1px solid var(--clr-border);padding:12px;font-size:0.84rem;color:var(--clr-text2);display:none;z-index:200}
.hot-tags{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.hot-tags span{color:var(--clr-text3);font-size:0.78rem}
.hot-tags a{color:var(--clr-text2);font-size:0.78rem;padding:3px 11px;border:1px solid rgba(255,255,255,0.1);border-radius:50px;transition:var(--trans)}
.hot-tags a:hover{color:var(--clr-primary);border-color:var(--clr-primary)}

/* ---- 移动端菜单 ---- */
.mobile-nav{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.6);z-index:2000}
.mobile-nav.open{display:block}
.mobile-panel{position:absolute;top:0;left:0;width:280px;height:100%;background:var(--clr-bg3);padding:20px;overflow-y:auto;transform:translateX(-100%);transition:transform 0.3s ease}
.mobile-nav.open .mobile-panel{transform:translateX(0)}
.mobile-close{display:flex;justify-content:flex-end;margin-bottom:20px}
.mobile-links a{display:block;padding:13px 0;font-size:0.95rem;color:var(--clr-text2);border-bottom:1px solid var(--clr-border)}
.mobile-links a:hover{color:var(--clr-primary)}

/* ---- Hero Banner ---- */
.hero{position:relative;min-height:600px;display:flex;align-items:center;overflow:hidden;background:var(--clr-bg)}
.hero-bg-img{position:absolute;inset:0;background-image:url('../images/banner.jpg');background-size:cover;background-position:center;opacity:0.4;filter:blur(1px)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,11,20,0.9) 0%,rgba(0,212,255,0.08) 60%,rgba(180,79,255,0.12) 100%)}
.hero-particles{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.hero-content{position:relative;z-index:2;max-width:700px}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(0,212,255,0.12);border:1px solid rgba(0,212,255,0.3);color:var(--clr-primary);padding:5px 14px;border-radius:50px;font-size:0.8rem;font-weight:600;margin-bottom:20px}
.hero h1{font-size:3rem;font-weight:900;color:#fff;line-height:1.2;margin-bottom:18px;text-shadow:0 2px 20px rgba(0,0,0,0.5)}
.hero h1 .hl{color:var(--clr-primary)}
.hero h1 .hl2{color:var(--clr-accent)}
.hero-desc{font-size:1.05rem;color:rgba(255,255,255,0.75);margin-bottom:30px;line-height:1.8}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:36px;margin-top:44px;padding-top:28px;border-top:1px solid rgba(255,255,255,0.1)}
.hero-stat-n{font-size:1.9rem;font-weight:900;color:var(--clr-primary);display:block}
.hero-stat-l{font-size:0.8rem;color:rgba(255,255,255,0.55)}

/* ---- 视频卡片 ---- */
.video-card{background:var(--clr-card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-card);transition:var(--trans);cursor:pointer;border:1px solid var(--clr-border)}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:rgba(0,212,255,0.3)}
.video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9;background:#0d0f1e}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease}
.video-card:hover .video-thumb img{transform:scale(1.07)}
.play-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0.4);opacity:0;transition:var(--trans)}
.video-card:hover .play-overlay{opacity:1}
.play-btn{width:58px;height:58px;background:rgba(0,212,255,0.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transform:scale(0.8);transition:var(--trans);box-shadow:0 0 20px rgba(0,212,255,0.5)}
.video-card:hover .play-btn{transform:scale(1)}
.play-btn::after{content:'';width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #0a0b14;margin-left:4px}
.v-tag{position:absolute;top:10px;left:10px;background:var(--clr-hot);color:#fff;font-size:0.7rem;padding:3px 8px;border-radius:4px;font-weight:700}
.v-tag.lol{background:var(--clr-accent)}
.v-tag.ai{background:var(--clr-primary);color:#0a0b14}
.v-dur{position:absolute;bottom:8px;right:10px;background:rgba(0,0,0,0.75);color:#fff;font-size:0.72rem;padding:2px 7px;border-radius:4px}
.v-info{padding:14px}
.v-title{font-size:0.92rem;font-weight:600;color:var(--clr-text);margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.v-meta{display:flex;align-items:center;justify-content:space-between;font-size:0.78rem;color:var(--clr-text3)}
.v-meta-l{display:flex;gap:10px}
.v-author{display:flex;align-items:center;gap:6px;margin-top:8px}
.v-avatar{width:24px;height:24px;border-radius:50%;background:linear-gradient(135deg,var(--clr-primary),var(--clr-accent));display:flex;align-items:center;justify-content:center;color:#0a0b14;font-size:0.62rem;font-weight:700;flex-shrink:0}
.v-name{font-size:0.78rem;color:var(--clr-text2)}

/* ---- 分类标签 ---- */
.cat-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:30px}
.cat-btn{padding:7px 18px;border-radius:50px;font-size:0.86rem;font-weight:500;border:1.5px solid var(--clr-border);color:var(--clr-text2);background:transparent;transition:var(--trans);cursor:pointer}
.cat-btn:hover,.cat-btn.active{background:var(--clr-primary);border-color:var(--clr-primary);color:#0a0b14;font-weight:700}

/* ---- 功能卡片 ---- */
.feat-card{background:var(--clr-card);border-radius:var(--radius-lg);padding:26px 22px;box-shadow:var(--shadow-card);border:1px solid var(--clr-border);transition:var(--trans)}
.feat-card:hover{transform:translateY(-4px);border-color:rgba(0,212,255,0.25);box-shadow:var(--shadow-hover)}
.feat-icon{width:54px;height:54px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:14px}
.feat-icon.blue{background:rgba(0,212,255,0.12)}
.feat-icon.purple{background:rgba(180,79,255,0.12)}
.feat-icon.orange{background:rgba(255,107,53,0.12)}
.feat-icon.green{background:rgba(0,230,118,0.12)}
.feat-title{font-size:1rem;font-weight:700;margin-bottom:8px;color:var(--clr-text)}
.feat-desc{font-size:0.86rem;color:var(--clr-text2);line-height:1.7}

/* ---- 专家卡片 ---- */
.expert-card{background:var(--clr-card);border-radius:var(--radius-lg);padding:26px 22px;box-shadow:var(--shadow-card);text-align:center;transition:var(--trans);border:1px solid var(--clr-border)}
.expert-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:rgba(0,212,255,0.25)}
.expert-avatar{width:88px;height:88px;border-radius:50%;object-fit:cover;margin:0 auto 14px;border:2px solid var(--clr-primary);padding:2px}
.expert-name{font-size:1.05rem;font-weight:700;margin-bottom:4px}
.expert-role{font-size:0.8rem;color:var(--clr-primary);font-weight:600;margin-bottom:10px}
.expert-bio{font-size:0.83rem;color:var(--clr-text2);line-height:1.6;margin-bottom:14px}
.expert-tags{display:flex;gap:5px;justify-content:center;flex-wrap:wrap;margin-bottom:14px}
.expert-tag{font-size:0.72rem;padding:2px 9px;background:rgba(0,212,255,0.08);color:var(--clr-primary);border-radius:50px;border:1px solid rgba(0,212,255,0.2)}
.expert-btns{display:flex;gap:7px;justify-content:center}

/* ---- 统计数字 ---- */
.stat-card{text-align:center;padding:28px 18px;background:var(--clr-card);border-radius:var(--radius);box-shadow:var(--shadow-card);border:1px solid var(--clr-border)}
.stat-num{font-size:2.4rem;font-weight:900;background:linear-gradient(135deg,var(--clr-primary),var(--clr-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:block;margin-bottom:6px}
.stat-label{font-size:0.86rem;color:var(--clr-text2)}

/* ---- 评价卡片 ---- */
.review-card{background:var(--clr-card);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-card);border:1px solid var(--clr-border);transition:var(--trans)}
.review-card:hover{border-color:rgba(0,212,255,0.2);box-shadow:var(--shadow-hover)}
.review-hd{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.review-av{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--clr-primary),var(--clr-accent));display:flex;align-items:center;justify-content:center;color:#0a0b14;font-weight:700;font-size:0.95rem;flex-shrink:0}
.review-name{font-weight:600;font-size:0.92rem}
.review-date{font-size:0.75rem;color:var(--clr-text3)}
.review-stars{color:var(--clr-gold);font-size:0.88rem;margin-bottom:9px}
.review-text{font-size:0.87rem;color:var(--clr-text2);line-height:1.7}
.review-from{font-size:0.75rem;color:var(--clr-text3);margin-top:9px}

/* ---- FAQ ---- */
.faq-item{border:1px solid var(--clr-border);border-radius:var(--radius);margin-bottom:10px;overflow:hidden;transition:var(--trans)}
.faq-item.open{border-color:rgba(0,212,255,0.3)}
.faq-q{padding:16px 20px;font-weight:600;font-size:0.92rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;background:var(--clr-card);transition:var(--trans);color:var(--clr-text)}
.faq-q:hover{background:rgba(0,212,255,0.04)}
.faq-item.open .faq-q{color:var(--clr-primary)}
.faq-icon{width:22px;height:22px;border-radius:50%;background:rgba(255,255,255,0.08);display:flex;align-items:center;justify-content:center;font-size:0.95rem;flex-shrink:0;transition:var(--trans)}
.faq-item.open .faq-icon{background:var(--clr-primary);color:#0a0b14;transform:rotate(45deg)}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:max-height 0.35s ease,padding 0.35s ease;font-size:0.88rem;color:var(--clr-text2);line-height:1.8;background:var(--clr-card)}
.faq-item.open .faq-a{max-height:300px;padding:0 20px 16px}

/* ---- 联系 ---- */
.contact-card{background:var(--clr-card);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-card);border:1px solid var(--clr-border)}
.contact-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:18px;padding-bottom:18px;border-bottom:1px solid var(--clr-border)}
.contact-item:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.c-icon{width:42px;height:42px;background:linear-gradient(135deg,rgba(0,212,255,0.15),rgba(180,79,255,0.15));border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.05rem;flex-shrink:0;border:1px solid var(--clr-border)}
.c-label{font-size:0.78rem;color:var(--clr-text3);margin-bottom:2px}
.c-val{font-weight:600;font-size:0.92rem;color:var(--clr-text)}

/* ---- 合作品牌 ---- */
.partner-logo{background:var(--clr-card);border:1px solid var(--clr-border);border-radius:var(--radius);padding:18px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:0.95rem;color:var(--clr-text2);transition:var(--trans);height:76px}
.partner-logo:hover{border-color:var(--clr-primary);color:var(--clr-primary);box-shadow:var(--shadow-card)}

/* ---- 二维码 ---- */
.qr-box{text-align:center;padding:18px}
.qr-img{width:110px;height:110px;margin:0 auto 9px;border-radius:10px;border:1.5px solid var(--clr-border);background:rgba(255,255,255,0.05);display:flex;align-items:center;justify-content:center;overflow:hidden}
.qr-label{font-size:0.8rem;color:var(--clr-text2)}

/* ---- 社交分享 ---- */
.share-bar{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.share-btn{display:inline-flex;align-items:center;gap:5px;padding:7px 14px;border-radius:50px;font-size:0.8rem;font-weight:600;transition:var(--trans);cursor:pointer;border:none}
.share-wechat{background:#07c160;color:#fff}
.share-weibo{background:#e6162d;color:#fff}
.share-douyin{background:#010101;color:#fff;border:1px solid rgba(255,255,255,0.2)}
.share-bili{background:#00a1d6;color:#fff}
.share-btn:hover{transform:translateY(-2px);opacity:0.9}

/* ---- 标签 ---- */
.tag{display:inline-block;padding:3px 9px;border-radius:4px;font-size:0.72rem;font-weight:600;margin:2px}
.tag-blue{background:rgba(0,212,255,0.1);color:var(--clr-primary)}
.tag-purple{background:rgba(180,79,255,0.1);color:var(--clr-accent)}
.tag-orange{background:rgba(255,107,53,0.1);color:var(--clr-hot)}
.tag-gold{background:rgba(255,215,0,0.1);color:var(--clr-gold)}

/* ---- 分页 ---- */
.pagination{display:flex;justify-content:center;gap:7px;margin-top:36px}
.page-btn{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:0.86rem;border:1.5px solid var(--clr-border);color:var(--clr-text2);transition:var(--trans);cursor:pointer;background:var(--clr-card)}
.page-btn:hover,.page-btn.active{background:var(--clr-primary);border-color:var(--clr-primary);color:#0a0b14}

/* ---- 面包屑 ---- */
.breadcrumb{padding:12px 0;font-size:0.83rem;color:var(--clr-text3)}
.breadcrumb a{color:var(--clr-text3)}
.breadcrumb a:hover{color:var(--clr-primary)}
.breadcrumb span{margin:0 7px}

/* ---- 内页Banner ---- */
.page-banner{background:linear-gradient(135deg,var(--clr-bg) 0%,var(--clr-bg3) 100%);padding:56px 0;position:relative;overflow:hidden;border-bottom:1px solid var(--clr-border)}
.page-banner::before{content:'';position:absolute;top:-40%;right:-8%;width:480px;height:480px;background:radial-gradient(circle,rgba(0,212,255,0.08) 0%,transparent 70%);border-radius:50%}
.page-banner h1{font-size:2rem;font-weight:800;color:#fff;margin-bottom:9px}
.page-banner p{color:var(--clr-text2);font-size:0.95rem}

/* ---- 侧边栏 ---- */
.sidebar-widget{background:var(--clr-card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-card);margin-bottom:22px;border:1px solid var(--clr-border)}
.sidebar-widget h3{font-size:0.95rem;font-weight:700;margin-bottom:14px;padding-bottom:9px;border-bottom:2px solid var(--clr-primary);display:inline-block;color:var(--clr-text)}
.hot-list li{display:flex;align-items:center;gap:9px;padding:7px 0;border-bottom:1px solid rgba(255,255,255,0.04);font-size:0.86rem}
.hot-list li:last-child{border-bottom:none}
.hot-rank{width:20px;height:20px;border-radius:4px;background:rgba(255,255,255,0.08);display:flex;align-items:center;justify-content:center;font-size:0.72rem;font-weight:700;flex-shrink:0;color:var(--clr-text3)}
.hot-rank.top{background:var(--clr-hot);color:#fff}
.hot-list a{color:var(--clr-text2);flex:1}
.hot-list a:hover{color:var(--clr-primary)}

/* ---- 直播标签 ---- */
.live-badge{display:inline-flex;align-items:center;gap:4px;background:#e6162d;color:#fff;font-size:0.7rem;font-weight:700;padding:2px 7px;border-radius:4px}
.live-dot{width:5px;height:5px;background:#fff;border-radius:50%;animation:blink 1s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0.3}}

/* ---- 渐入动画 ---- */
.fade-in{opacity:0;transform:translateY(18px);transition:opacity 0.6s ease,transform 0.6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* ---- 回到顶部 ---- */
.back-top{position:fixed;bottom:28px;right:28px;width:42px;height:42px;background:linear-gradient(135deg,var(--clr-primary),var(--clr-accent));color:#0a0b14;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1rem;box-shadow:0 4px 16px rgba(0,212,255,0.4);cursor:pointer;opacity:0;visibility:hidden;transition:var(--trans);z-index:999}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{transform:translateY(-3px)}

/* ---- 页脚 ---- */
.footer{background:var(--clr-bg2);border-top:1px solid var(--clr-border);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px;border-bottom:1px solid var(--clr-border)}
.footer-brand .logo-text{font-size:1.4rem}
.footer-brand p{font-size:0.86rem;line-height:1.8;margin-top:12px;color:var(--clr-text3)}
.footer-col h4{font-size:0.92rem;font-weight:700;color:var(--clr-text);margin-bottom:16px;padding-bottom:8px;border-bottom:2px solid var(--clr-primary);display:inline-block}
.footer-col ul li{margin-bottom:9px}
.footer-col ul li a{font-size:0.83rem;color:var(--clr-text3);transition:var(--trans)}
.footer-col ul li a:hover{color:var(--clr-primary);padding-left:4px}
.footer-bottom{padding:18px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:9px;font-size:0.8rem;color:var(--clr-text3)}
.footer-bottom a{color:var(--clr-text3)}
.footer-bottom a:hover{color:var(--clr-primary)}

/* ---- AI区域 ---- */
.ai-card{background:rgba(255,255,255,0.04);border:1px solid rgba(0,212,255,0.12);border-radius:var(--radius-lg);padding:26px;transition:var(--trans)}
.ai-card:hover{border-color:rgba(0,212,255,0.3);background:rgba(0,212,255,0.04)}

/* ---- 骨架屏 ---- */
.skeleton{background:linear-gradient(90deg,var(--clr-bg3) 25%,var(--clr-bg2) 50%,var(--clr-bg3) 75%);background-size:200% 100%;animation:skel 1.5s infinite;border-radius:6px}
@keyframes skel{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* ---- 响应式 ---- */
@media(max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:2.4rem}
}
@media(max-width:768px){
  .section{padding:50px 0}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .nav{display:none}
  .mobile-btn{display:flex}
  .hero h1{font-size:1.9rem}
  .hero-stats{gap:18px;flex-wrap:wrap}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .section-title{font-size:1.5rem}
  .search-nav .container{flex-direction:column;align-items:stretch}
  .hot-tags{display:none}
}
@media(max-width:480px){
  .grid-4{grid-template-columns:1fr}
  .hero h1{font-size:1.6rem}
  .hero-btns{flex-direction:column}
  .footer-bottom{flex-direction:column;text-align:center}
}