/* 呦呦视频 - 原创样式表 */
/* 配色：蜜桃粉#FF6B9D 深玫红#C44569 暖金#F8B500 淡粉白#FFF5F7 深紫褐#2D1B2E */

:root {
  --peach: #FF6B9D;
  --peach-light: #FF8FB4;
  --rose: #C44569;
  --rose-dark: #9E3050;
  --gold: #F8B500;
  --gold-light: #FFD54F;
  --bg-light: #FFF5F7;
  --bg-white: #FFFFFF;
  --dark: #2D1B2E;
  --dark-mid: #3D2B3E;
  --text-main: #333333;
  --text-sub: #666666;
  --text-light: #999999;
  --border: #F0E0E5;
  --card-shadow: 0 4px 20px rgba(196,69,105,.08);
  --card-hover: 0 8px 32px rgba(196,69,105,.15);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background: var(--bg-light);
  color: var(--text-main);
  line-height: 1.8;
  overflow-x: hidden;
}

a { color: var(--rose); text-decoration: none; transition: color .3s; }
a:hover { color: var(--peach); }
img { max-width: 100%; height: auto; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 顶部导航 ===== */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s;
}
.site-nav.scrolled { box-shadow: 0 2px 20px rgba(45,27,46,.1); }
.site-nav .container { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav-brand { display: flex; align-items: center; gap: 10px; }
.nav-brand img { height: 38px; border-radius: 8px; }
.nav-brand .brand-name { font-size: 20px; font-weight: 800; color: var(--dark); }
.nav-brand .brand-name em { font-style: normal; color: var(--peach); }

.nav-menu { display: flex; gap: 24px; list-style: none; }
.nav-menu li a {
  font-size: 15px; color: var(--text-main); font-weight: 500;
  padding: 6px 0; position: relative; transition: color .3s;
}
.nav-menu li a::after {
  content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px;
  background: linear-gradient(90deg,var(--peach),var(--rose));
  transition: width .3s;
}
.nav-menu li a:hover { color: var(--rose); }
.nav-menu li a:hover::after, .nav-menu li a.active::after { width: 100%; }

.nav-hamburger { display: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 8px; }
.nav-hamburger span { display: block; width: 24px; height: 2px; background: var(--dark); transition: all .3s; border-radius: 2px; }

/* 搜索框 */
.sb-fxzmb {
  background: linear-gradient(135deg,var(--peach),var(--rose));
  padding: 12px 0;
}
.sb-fxzmb .container { display: flex; justify-content: center; }
.sw-fxzmb {
  display: flex; width: 100%; max-width: 600px;
  background: #fff; border-radius: 30px; overflow: hidden;
  box-shadow: 0 2px 12px rgba(196,69,105,.2);
}
.sw-fxzmb input {
  flex: 1; border: none; padding: 10px 20px; font-size: 14px;
  outline: none; background: transparent; color: var(--text-main);
}
.sw-fxzmb input::placeholder { color: var(--text-light); }
.sw-fxzmb button {
  background: linear-gradient(135deg,var(--peach),var(--rose));
  border: none; color: #fff; padding: 10px 24px; cursor: pointer;
  font-size: 14px; font-weight: 600; transition: opacity .3s;
}
.sw-fxzmb button:hover { opacity: .85; }

/* ===== Hero Banner ===== */
.hero {
  position: relative; height: 520px; overflow: hidden;
  margin-top: 64px;
}
.hero img {
  width: 100%; height: 100%; object-fit: cover;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg,rgba(45,27,46,.3) 0%,rgba(45,27,46,.7) 100%);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 20px;
}
.hero-overlay h1 {
  font-size: 42px; color: #fff; font-weight: 900; margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0,0,0,.3);
}
.hero-overlay h1 em { font-style: normal; color: var(--gold); }
.hero-overlay p {
  font-size: 18px; color: rgba(255,255,255,.9); max-width: 600px; margin-bottom: 24px;
}
.hero-btn {
  display: inline-block; padding: 12px 36px; border-radius: 30px;
  background: linear-gradient(135deg,var(--peach),var(--rose));
  color: #fff; font-size: 16px; font-weight: 600;
  box-shadow: 0 4px 16px rgba(196,69,105,.4);
  transition: transform .3s, box-shadow .3s;
}
.hero-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(196,69,105,.5); color: #fff; }

/* ===== 通用板块 ===== */
.section { padding: 60px 0; }
.section-alt { background: var(--bg-white); }
.section-dark { background: var(--dark); color: #fff; }
.section-title {
  text-align: center; margin-bottom: 40px;
}
.section-title h2 {
  font-size: 30px; font-weight: 800; color: var(--dark); margin-bottom: 8px;
}
.section-dark .section-title h2 { color: #fff; }
.section-title h2 em { font-style: normal; color: var(--peach); }
.section-title p { font-size: 15px; color: var(--text-sub); }
.section-dark .section-title p { color: rgba(255,255,255,.7); }

/* ===== 视频卡片 ===== */
.video-grid {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 20px;
}
.video-card {
  background: var(--bg-white); border-radius: 12px; overflow: hidden;
  box-shadow: var(--card-shadow); transition: transform .3s, box-shadow .3s;
}
.video-card:hover { transform: translateY(-4px); box-shadow: var(--card-hover); }
.video-thumb {
  position: relative; padding-top: 56.25%; overflow: hidden; cursor: pointer;
}
.video-thumb img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s;
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.play-overlay {
  position: absolute; inset: 0;
  background: rgba(45,27,46,.4);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity .3s;
}
.video-thumb:hover .play-overlay { opacity: 1; }
.play-btn {
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(255,107,157,.9);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(196,69,105,.4);
  transition: transform .3s;
}
.play-btn::after {
  content: ''; display: block; width: 0; height: 0;
  border-left: 18px solid #fff; border-top: 11px solid transparent; border-bottom: 11px solid transparent;
  margin-left: 4px;
}
.video-thumb:hover .play-btn { transform: scale(1.1); }
.video-duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,.7); color: #fff; font-size: 12px;
  padding: 2px 8px; border-radius: 4px;
}
.video-info { padding: 14px; }
.video-info h3 { font-size: 15px; font-weight: 600; color: var(--text-main); margin-bottom: 6px; line-height: 1.5; }
.video-meta { display: flex; gap: 12px; font-size: 12px; color: var(--text-light); margin-bottom: 6px; }
.video-tag {
  display: inline-block; font-size: 11px; padding: 2px 10px; border-radius: 20px;
  background: linear-gradient(135deg,rgba(255,107,157,.1),rgba(196,69,105,.1));
  color: var(--rose);
}

/* ===== 内容板块卡片 ===== */
.content-grid {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 24px;
}
.content-card {
  background: var(--bg-white); border-radius: 16px; overflow: hidden;
  box-shadow: var(--card-shadow); transition: transform .3s, box-shadow .3s;
}
.content-card:hover { transform: translateY(-4px); box-shadow: var(--card-hover); }
.content-card-img { height: 200px; overflow: hidden; }
.content-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.content-card:hover .content-card-img img { transform: scale(1.05); }
.content-card-body { padding: 20px; }
.content-card-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--dark); }
.content-card-body p { font-size: 14px; color: var(--text-sub); line-height: 1.7; }

/* ===== 双栏布局 ===== */
.split-section {
  display: flex; align-items: center; gap: 48px;
}
.split-section.reverse { flex-direction: row-reverse; }
.split-img { flex: 1; border-radius: 16px; overflow: hidden; box-shadow: var(--card-shadow); }
.split-img img { width: 100%; display: block; }
.split-text { flex: 1; }
.split-text h2 { font-size: 28px; font-weight: 800; color: var(--dark); margin-bottom: 12px; }
.split-text h2 em { font-style: normal; color: var(--peach); }
.split-text p { font-size: 15px; color: var(--text-sub); margin-bottom: 16px; line-height: 1.8; }
.split-text .tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.split-text .tag-list span {
  font-size: 13px; padding: 4px 14px; border-radius: 20px;
  background: linear-gradient(135deg,rgba(255,107,157,.1),rgba(196,69,105,.08));
  color: var(--rose); font-weight: 500;
}

/* ===== 专家展示 ===== */
.expert-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.expert-card {
  background: var(--bg-white); border-radius: 16px; padding: 28px; text-align: center;
  box-shadow: var(--card-shadow); transition: transform .3s;
}
.expert-card:hover { transform: translateY(-4px); }
.expert-card img {
  width: 100px; height: 100px; border-radius: 50%; margin: 0 auto 16px;
  border: 3px solid var(--peach); object-fit: cover;
}
.expert-card h3 { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 4px; }
.expert-card .role { font-size: 13px; color: var(--peach); font-weight: 600; margin-bottom: 8px; }
.expert-card p { font-size: 13px; color: var(--text-sub); margin-bottom: 12px; }
.expert-card .awards { font-size: 12px; color: var(--gold); margin-bottom: 12px; }
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.expert-btns a {
  font-size: 12px; padding: 5px 14px; border-radius: 20px; font-weight: 500;
}
.btn-primary {
  background: linear-gradient(135deg,var(--peach),var(--rose));
  color: #fff;
}
.btn-outline {
  border: 1px solid var(--peach); color: var(--peach);
}
.btn-outline:hover { background: var(--peach); color: #fff; }

/* ===== 品牌墙 ===== */
.brand-wall {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 32px;
  padding: 20px 0;
}
.brand-wall-item {
  width: 140px; height: 60px; background: var(--bg-white); border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--card-shadow); font-size: 14px; font-weight: 700;
  color: var(--text-sub); transition: transform .3s;
}
.brand-wall-item:hover { transform: scale(1.05); }

/* ===== 用户评价 ===== */
.review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.review-card {
  background: var(--bg-white); border-radius: 14px; padding: 24px;
  box-shadow: var(--card-shadow); position: relative;
}
.review-card::before {
  content: '\201C'; position: absolute; top: 12px; left: 18px;
  font-size: 48px; color: var(--peach); opacity: .2; font-family: serif;
}
.review-stars { color: var(--gold); font-size: 14px; margin-bottom: 8px; }
.review-card p { font-size: 14px; color: var(--text-sub); line-height: 1.7; margin-bottom: 12px; }
.review-author { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg,var(--peach),var(--rose));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 14px; font-weight: 700;
}
.review-author-info span { display: block; }
.review-author-info .name { font-size: 14px; font-weight: 600; color: var(--dark); }
.review-author-info .date { font-size: 12px; color: var(--text-light); }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-white); border-radius: 12px; margin-bottom: 12px;
  box-shadow: var(--card-shadow); overflow: hidden;
}
.faq-q {
  padding: 18px 24px; cursor: pointer; font-weight: 600; font-size: 15px;
  color: var(--dark); display: flex; justify-content: space-between; align-items: center;
  transition: background .3s;
}
.faq-q:hover { background: rgba(255,107,157,.04); }
.faq-q::after { content: '+'; font-size: 20px; color: var(--peach); 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 .3s;
  padding: 0 24px; font-size: 14px; color: var(--text-sub); line-height: 1.8;
}
.faq-item.open .faq-a { max-height: 300px; padding: 0 24px 18px; }

/* ===== 联系我们 ===== */
.contact-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 32px; }
.contact-info { display: flex; flex-direction: column; gap: 16px; }
.contact-item { display: flex; gap: 12px; align-items: flex-start; }
.contact-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg,var(--peach),var(--rose));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 18px; flex-shrink: 0;
}
.contact-item h4 { font-size: 15px; font-weight: 600; color: var(--dark); }
.contact-item p { font-size: 13px; color: var(--text-sub); }
.qrcode-wrap { display: flex; gap: 24px; justify-content: center; }
.qrcode-box { text-align: center; }
.qrcode-box img { width: 140px; height: 140px; border-radius: 10px; margin-bottom: 8px; }
.qrcode-box span { font-size: 13px; color: var(--text-sub); }

/* ===== 社交分享 ===== */
.sh-xm32w { display: flex; gap: 12px; justify-content: center; padding: 20px 0; }
.sb-xm32w {
  width: 40px; height: 40px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px; font-weight: 700;
  transition: transform .3s;
}
.sb-xm32w:hover { transform: scale(1.15); color: #fff; }
.sw-k2vzp { background: #07C160; }
.swb-dw94mr { background: #E6162D; }
.sdy-xsvii8 { background: #161823; }
.sbl-rj2nek8u { background: #00A1D6; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark); color: rgba(255,255,255,.7); padding: 48px 0 24px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
.footer-brand img { height: 36px; margin-bottom: 12px; }
.footer-brand p { font-size: 13px; line-height: 1.7; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 13px; color: rgba(255,255,255,.6); }
.footer-col ul li a:hover { color: var(--peach); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); padding-top: 20px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px;
}
.footer-bottom a { color: rgba(255,255,255,.5); }

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 14px 0; font-size: 13px; color: var(--text-light);
  margin-top: 64px;
}
.breadcrumb a { color: var(--text-sub); }
.breadcrumb span { margin: 0 6px; }

/* ===== 内页通用 ===== */
.page-hero {
  background: linear-gradient(135deg,var(--dark),var(--dark-mid));
  padding: 80px 0 40px; margin-top: 64px; text-align: center;
}
.page-hero h1 { font-size: 32px; color: #fff; font-weight: 800; margin-bottom: 8px; }
.page-hero h1 em { font-style: normal; color: var(--peach); }
.page-hero p { font-size: 15px; color: rgba(255,255,255,.7); }

/* ===== How-To 指南 ===== */
.howto-steps { display: flex; gap: 24px; flex-wrap: wrap; justify-content: center; }
.howto-step {
  flex: 1; min-width: 200px; max-width: 280px;
  background: var(--bg-white); border-radius: 14px; padding: 28px 20px;
  text-align: center; box-shadow: var(--card-shadow);
}
.howto-step .step-num {
  width: 48px; height: 48px; border-radius: 50%; margin: 0 auto 14px;
  background: linear-gradient(135deg,var(--peach),var(--rose));
  color: #fff; font-size: 20px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
.howto-step h4 { font-size: 16px; font-weight: 700; color: var(--dark); margin-bottom: 6px; }
.howto-step p { font-size: 13px; color: var(--text-sub); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(3,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-menu { display: none; position: fixed; top: 64px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 20px; gap: 16px; border-bottom: 1px solid var(--border); box-shadow: 0 4px 20px rgba(0,0,0,.1); }
  .nav-menu.open { display: flex; }
  .nav-hamburger { display: flex; }
  .hero { height: 360px; }
  .hero-overlay h1 { font-size: 28px; }
  .hero-overlay p { font-size: 15px; }
  .video-grid { grid-template-columns: repeat(2,1fr); }
  .content-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: repeat(2,1fr); }
  .review-grid { grid-template-columns: 1fr; }
  .split-section, .split-section.reverse { flex-direction: column; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 40px 0; }
  .section-title h2 { font-size: 24px; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .hero { height: 280px; }
  .hero-overlay h1 { font-size: 22px; }
}