/* ============================================
   喷水 - 原创样式表
   品牌色系：珊瑚粉 #FF6B8A / 蜜桃橙 #FFB4A2 / 深夜蓝 #1A1A2E / 星空紫 #16213E
   ============================================ */

/* === 基础重置 === */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;color:#2d2d3a;background:#faf9fb;line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .3s}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3}

/* === 配色变量 === */
:root{
  --coral:#FF6B8A;
  --peach:#FFB4A2;
  --navy:#1A1A2E;
  --deep:#16213E;
  --purple:#533483;
  --light:#faf9fb;
  --white:#ffffff;
  --gray100:#f5f5f7;
  --gray200:#e8e8ed;
  --gray500:#8e8e93;
  --gray700:#48484a;
  --shadow:0 4px 24px rgba(26,26,46,.08);
  --shadow-lg:0 8px 40px rgba(26,26,46,.12);
  --radius:12px;
  --radius-lg:20px;
  --transition:all .35s cubic-bezier(.4,0,.2,1);
}

/* === 容器 === */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.section-title{font-size:1.8rem;color:var(--navy);text-align:center;margin-bottom:12px;position:relative}
.section-title::after{content:'';display:block;width:60px;height:3px;background:linear-gradient(90deg,var(--coral),var(--peach));margin:12px auto 0;border-radius:2px}
.section-desc{text-align:center;color:var(--gray500);font-size:.95rem;margin-bottom:40px;max-width:640px;margin-left:auto;margin-right:auto}

/* === 顶部导航 === */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(26,26,46,.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.06);transition:var(--transition)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.site-logo{display:flex;align-items:center;gap:10px}
.site-logo img{height:36px;width:auto}
.site-logo span{font-size:1.15rem;font-weight:700;color:var(--white);letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{color:rgba(255,255,255,.78);font-size:.88rem;padding:6px 14px;border-radius:8px;transition:var(--transition);white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:var(--white);background:rgba(255,107,138,.18)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--white);border-radius:2px;transition:var(--transition)}

/* === 搜索栏 === */
.search-bar{background:linear-gradient(135deg,var(--navy) 0%,var(--deep) 100%);padding:14px 0;margin-top:64px}
.search-bar .container{display:flex;justify-content:center}
.search-wrap{position:relative;width:100%;max-width:580px}
.search-wrap input{width:100%;padding:10px 48px 10px 18px;border:1px solid rgba(255,255,255,.15);background:rgba(255,255,255,.08);color:var(--white);border-radius:24px;font-size:.9rem;outline:none;transition:var(--transition)}
.search-wrap input::placeholder{color:rgba(255,255,255,.45)}
.search-wrap input:focus{border-color:var(--coral);background:rgba(255,255,255,.12)}
.search-wrap .search-btn{position:absolute;right:4px;top:50%;transform:translateY(-50%);background:linear-gradient(135deg,var(--coral),var(--peach));border:none;color:var(--white);width:36px;height:36px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1rem;transition:var(--transition)}
.search-wrap .search-btn:hover{transform:translateY(-50%) scale(1.08)}

/* === Hero 横幅 === */
.hero{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden;background:var(--navy)}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.55)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(26,26,46,.3) 0%,rgba(26,26,46,.85) 100%)}
.hero-content{position:relative;z-index:2;text-align:center;width:100%;padding:80px 20px 60px}
.hero h1{font-size:2.6rem;color:var(--white);margin-bottom:16px;text-shadow:0 2px 12px rgba(0,0,0,.3)}
.hero h1 em{font-style:normal;color:var(--coral)}
.hero p{font-size:1.1rem;color:rgba(255,255,255,.82);max-width:600px;margin:0 auto 28px;line-height:1.8}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:28px}
.hero-tags span{background:rgba(255,107,138,.18);color:var(--peach);padding:5px 16px;border-radius:20px;font-size:.82rem;border:1px solid rgba(255,107,138,.25)}
.hero-btn{display:inline-block;padding:12px 36px;background:linear-gradient(135deg,var(--coral),var(--peach));color:var(--white);border-radius:28px;font-size:1rem;font-weight:600;transition:var(--transition);box-shadow:0 4px 20px rgba(255,107,138,.35)}
.hero-btn:hover{transform:translateY(-2px);box-shadow:0 6px 28px rgba(255,107,138,.5)}

/* === 视频卡片网格 === */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{position:relative;border-radius:var(--radius);overflow:hidden;background:var(--white);box-shadow:var(--shadow);transition:var(--transition);cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#1a1a2e}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.06)}
.video-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .35s;background:rgba(26,26,46,.35)}
.video-card:hover .video-play{opacity:1}
.video-play-icon{width:56px;height:56px;background:rgba(255,107,138,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:var(--transition)}
.video-play-icon::after{content:'';display:block;width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent var(--white);margin-left:3px}
.video-card:hover .video-play-icon{transform:scale(1.12)}
.video-info{padding:14px 16px}
.video-title{font-size:.95rem;font-weight:600;color:var(--navy);margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:12px;font-size:.78rem;color:var(--gray500)}
.video-meta span{display:flex;align-items:center;gap:3px}
.video-tag{display:inline-block;padding:2px 8px;background:var(--gray100);color:var(--gray500);border-radius:4px;font-size:.72rem;margin-top:6px}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.72);color:var(--white);padding:2px 8px;border-radius:4px;font-size:.72rem}

/* === 分类标签栏 === */
.tab-bar{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:32px}
.tab-bar a{padding:7px 20px;border-radius:20px;font-size:.88rem;color:var(--gray700);background:var(--gray100);transition:var(--transition);border:1px solid transparent}
.tab-bar a:hover,.tab-bar a.active{background:linear-gradient(135deg,var(--coral),var(--peach));color:var(--white);border-color:transparent}

/* === 专家卡片 === */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:var(--white);border-radius:var(--radius-lg);padding:28px 20px;text-align:center;box-shadow:var(--shadow);transition:var(--transition)}
.expert-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.expert-avatar{width:90px;height:90px;border-radius:50%;object-fit:cover;margin:0 auto 14px;border:3px solid var(--peach)}
.expert-name{font-size:1.05rem;font-weight:700;color:var(--navy);margin-bottom:4px}
.expert-role{font-size:.82rem;color:var(--coral);margin-bottom:10px}
.expert-desc{font-size:.82rem;color:var(--gray500);line-height:1.6;margin-bottom:14px}
.expert-btn{display:inline-block;padding:6px 20px;border:1px solid var(--coral);color:var(--coral);border-radius:20px;font-size:.82rem;transition:var(--transition)}
.expert-btn:hover{background:var(--coral);color:var(--white)}

/* === FAQ 手风琴 === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--white);border-radius:var(--radius);margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden}
.faq-q{padding:16px 20px;font-size:.95rem;font-weight:600;color:var(--navy);cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:var(--transition)}
.faq-q:hover{color:var(--coral)}
.faq-q::after{content:'+';font-size:1.3rem;color:var(--coral);transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 20px}
.faq-item.open .faq-a{max-height:300px;padding:0 20px 16px}
.faq-a p{font-size:.88rem;color:var(--gray700);line-height:1.8}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.review-card{background:var(--white);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:var(--transition)}
.review-card:hover{box-shadow:var(--shadow-lg)}
.review-stars{color:#FFB800;font-size:.9rem;margin-bottom:8px;letter-spacing:2px}
.review-text{font-size:.88rem;color:var(--gray700);line-height:1.7;margin-bottom:12px}
.review-user{display:flex;align-items:center;gap:10px}
.review-user-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--coral),var(--peach));display:flex;align-items:center;justify-content:center;color:var(--white);font-size:.82rem;font-weight:700}
.review-user-info{font-size:.82rem}
.review-user-name{font-weight:600;color:var(--navy)}
.review-user-date{color:var(--gray500);font-size:.75rem}

/* === 合作品牌 === */
.brand-wall{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:32px;padding:20px 0}
.brand-wall .brand-item{width:120px;height:60px;display:flex;align-items:center;justify-content:center;background:var(--gray100);border-radius:8px;padding:10px;filter:grayscale(.6);opacity:.7;transition:var(--transition)}
.brand-wall .brand-item:hover{filter:grayscale(0);opacity:1}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px}
.contact-card{background:var(--white);border-radius:var(--radius);padding:24px;text-align:center;box-shadow:var(--shadow)}
.contact-icon{font-size:2rem;margin-bottom:10px}
.contact-label{font-size:.82rem;color:var(--gray500);margin-bottom:4px}
.contact-value{font-size:.95rem;font-weight:600;color:var(--navy)}

/* === 社交分享 === */
.share-bar{display:flex;justify-content:center;gap:14px;padding:20px 0}
.share-btn{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:var(--white);transition:var(--transition);cursor:pointer}
.share-btn:hover{transform:translateY(-3px)}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}

/* === How-To 指南 === */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;counter-reset:step}
.howto-step{background:var(--white);border-radius:var(--radius);padding:28px 20px;text-align:center;box-shadow:var(--shadow);position:relative;counter-increment:step}
.howto-step::before{content:counter(step);position:absolute;top:-14px;left:50%;transform:translateX(-50%);width:32px;height:32px;background:linear-gradient(135deg,var(--coral),var(--peach));color:var(--white);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.88rem;font-weight:700}
.howto-step h4{font-size:.95rem;color:var(--navy);margin-bottom:8px;margin-top:8px}
.howto-step p{font-size:.82rem;color:var(--gray500);line-height:1.6}

/* === 页脚 === */
.site-footer{background:var(--navy);color:rgba(255,255,255,.7);padding:48px 0 24px}
.footer-top{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;margin-bottom:32px}
.footer-col h4{color:var(--white);font-size:.95rem;margin-bottom:14px;position:relative;padding-bottom:8px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:var(--coral)}
.footer-col p,.footer-col a{font-size:.82rem;color:rgba(255,255,255,.6);line-height:2;display:block;transition:color .3s}
.footer-col a:hover{color:var(--coral)}
.footer-qr{display:flex;gap:20px;margin-top:10px}
.footer-qr img{width:100px;height:100px;border-radius:8px;border:2px solid rgba(255,255,255,.1)}
.footer-qr-label{font-size:.72rem;text-align:center;margin-top:4px;color:rgba(255,255,255,.5)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:20px;text-align:center;font-size:.78rem;color:rgba(255,255,255,.4)}
.footer-logo{display:flex;align-items:center;gap:8px;margin-bottom:10px}
.footer-logo img{height:28px}
.footer-logo span{font-size:1rem;font-weight:700;color:var(--white)}

/* === 面包屑 === */
.breadcrumb{padding:12px 0;font-size:.82rem;color:var(--gray500)}
.breadcrumb a{color:var(--coral)}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb span{margin:0 6px;color:var(--gray200)}

/* === AI赋能模块 === */
.ai-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px}
.ai-card{background:linear-gradient(135deg,var(--navy),var(--deep));border-radius:var(--radius-lg);padding:28px;color:var(--white);transition:var(--transition)}
.ai-card:hover{transform:translateY(-4px);box-shadow:0 8px 32px rgba(83,52,131,.3)}
.ai-card-icon{font-size:2.2rem;margin-bottom:12px}
.ai-card h4{font-size:1rem;margin-bottom:8px;color:var(--peach)}
.ai-card p{font-size:.82rem;color:rgba(255,255,255,.65);line-height:1.7}

/* === 社区功能 === */
.community-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}
.community-item{background:var(--white);border-radius:var(--radius);padding:20px;text-align:center;box-shadow:var(--shadow);transition:var(--transition);border:1px solid transparent}
.community-item:hover{border-color:var(--coral);transform:translateY(-3px)}
.community-icon{font-size:1.8rem;margin-bottom:8px}
.community-item h5{font-size:.88rem;color:var(--navy);margin-bottom:4px}
.community-item p{font-size:.75rem;color:var(--gray500)}

/* === 内页通用 === */
.page-header{background:linear-gradient(135deg,var(--navy),var(--deep));padding:100px 0 40px;text-align:center;color:var(--white)}
.page-header h1{font-size:2rem;margin-bottom:8px}
.page-header p{font-size:.95rem;color:rgba(255,255,255,.7)}
.page-content{padding:40px 0 60px}

/* === 响应式 === */
@media(max-width:768px){
  .main-nav{position:fixed;top:64px;left:0;width:100%;background:var(--navy);flex-direction:column;padding:16px;gap:4px;transform:translateY(-120%);transition:transform .35s;border-bottom:1px solid rgba(255,255,255,.06)}
  .main-nav.open{transform:translateY(0)}
  .nav-toggle{display:flex}
  .hero h1{font-size:1.8rem}
  .hero-content{padding:60px 16px 40px}
  .section{padding:40px 0}
  .section-title{font-size:1.4rem}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
  .expert-grid{grid-template-columns:1fr 1fr}
  .footer-top{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
  .hero-btn{padding:10px 28px;font-size:.9rem}
}
@media(max-width:480px){
  .expert-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .video-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
}