/* =====================================================
   17c一起草传媒 · 主样式文件
   品牌色：玫瑰金 #C9956B / 深紫 #3D1A5C / 樱粉 #F4A7B9
   issc8c.cn
   ===================================================== */

/* ---------- CSS 变量 ---------- */
:root {
  --rose-gold:   #C9956B;
  --rose-light:  #E8BCA0;
  --rose-pale:   #FDF0E8;
  --purple-deep: #3D1A5C;
  --purple-mid:  #6B3FA0;
  --purple-pale: #EDE0F7;
  --cherry:      #F4A7B9;
  --cherry-dark: #D4607A;
  --dark:        #1A1A2E;
  --dark-2:      #16213E;
  --gray-1:      #F8F8FC;
  --gray-2:      #EFEFEF;
  --gray-3:      #BBBBC8;
  --text-main:   #2C2C3E;
  --text-sub:    #6B6B80;
  --white:       #FFFFFF;
  --shadow-sm:   0 2px 12px rgba(61,26,92,.08);
  --shadow-md:   0 6px 28px rgba(61,26,92,.14);
  --shadow-lg:   0 12px 48px rgba(61,26,92,.18);
  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   22px;
  --transition:  all .28s cubic-bezier(.4,0,.2,1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: "PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color: var(--text-main);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---------- 工具类 ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.section-alt { background: var(--gray-1); }
.section-dark { background: var(--dark); color: var(--white); }
.section-purple { background: linear-gradient(135deg, var(--purple-deep) 0%, var(--purple-mid) 100%); color: var(--white); }
.text-center { text-align: center; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.tag {
  display: inline-block; padding: 3px 10px; border-radius: 20px;
  font-size: .75rem; font-weight: 600; letter-spacing: .5px;
  background: var(--purple-pale); color: var(--purple-mid);
}
.tag-rose { background: var(--rose-pale); color: var(--rose-gold); }
.tag-cherry { background: #FDE8EE; color: var(--cherry-dark); }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 11px 26px; border-radius: 50px; font-size: .95rem; font-weight: 600;
  transition: var(--transition); letter-spacing: .3px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--purple-mid), var(--rose-gold));
  color: var(--white); box-shadow: 0 4px 18px rgba(107,63,160,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(107,63,160,.45); }
.btn-outline {
  border: 2px solid var(--rose-gold); color: var(--rose-gold);
}
.btn-outline:hover { background: var(--rose-gold); color: var(--white); }
.btn-white {
  background: var(--white); color: var(--purple-deep); font-weight: 700;
}
.btn-white:hover { background: var(--rose-pale); }

/* ---------- 章节标题 ---------- */
.sec-head { margin-bottom: 44px; }
.sec-head h2 {
  font-size: 2rem; font-weight: 800; color: var(--purple-deep);
  position: relative; display: inline-block;
}
.sec-head h2::after {
  content: ''; position: absolute; left: 0; bottom: -8px;
  width: 48px; height: 4px; border-radius: 2px;
  background: linear-gradient(90deg, var(--rose-gold), var(--cherry));
}
.sec-head p { margin-top: 18px; color: var(--text-sub); font-size: 1.05rem; max-width: 560px; }
.sec-head.center h2::after { left: 50%; transform: translateX(-50%); }

/* =====================================================
   顶部通知栏
   ===================================================== */
.top-notice {
  background: linear-gradient(90deg, var(--purple-deep), var(--purple-mid), var(--rose-gold));
  color: var(--white); text-align: center; padding: 9px 20px;
  font-size: .85rem; letter-spacing: .3px;
}
.top-notice a { color: var(--cherry); font-weight: 600; margin-left: 8px; }
.top-notice a:hover { text-decoration: underline; }

/* =====================================================
   头部导航
   ===================================================== */
#site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255,255,255,.96); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(61,26,92,.08);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px; gap: 24px;
}
.logo-area {
  display: flex; align-items: center; gap: 12px; flex-shrink: 0;
}
.logo-area img { width: 44px; height: 44px; border-radius: 10px; object-fit: cover; }
.logo-text { line-height: 1.2; }
.logo-text .name {
  font-size: 1.3rem; font-weight: 800; color: var(--purple-deep);
  background: linear-gradient(135deg, var(--purple-deep), var(--rose-gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.logo-text .slogan { font-size: .72rem; color: var(--text-sub); letter-spacing: 1px; }

/* 主导航 */
#main-nav { display: flex; align-items: center; gap: 4px; }
#main-nav a {
  padding: 7px 14px; border-radius: var(--radius-sm);
  font-size: .9rem; font-weight: 500; color: var(--text-main);
  position: relative; white-space: nowrap;
}
#main-nav a:hover, #main-nav a.active {
  color: var(--purple-mid); background: var(--purple-pale);
}
#main-nav a.active::after {
  content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
  width: 18px; height: 3px; border-radius: 2px; background: var(--rose-gold);
}

/* 搜索框 */
.header-search {
  display: flex; align-items: center; gap: 0;
  background: var(--gray-1); border: 1.5px solid var(--gray-2);
  border-radius: 50px; overflow: hidden; transition: var(--transition);
  flex-shrink: 0;
}
.header-search:focus-within {
  border-color: var(--purple-mid); box-shadow: 0 0 0 3px rgba(107,63,160,.1);
}
.header-search input {
  border: none; background: none; padding: 8px 14px;
  font-size: .88rem; color: var(--text-main); outline: none; width: 180px;
  font-family: inherit;
}
.header-search button {
  padding: 8px 16px; background: var(--purple-mid); color: var(--white);
  font-size: .82rem; font-weight: 600; border-radius: 0 50px 50px 0;
  transition: var(--transition);
}
.header-search button:hover { background: var(--purple-deep); }

/* 汉堡菜单 */
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.nav-toggle span {
  display: block; width: 24px; height: 2px; border-radius: 2px;
  background: var(--purple-deep); transition: var(--transition);
}

/* 搜索结果提示 */
.search-hint {
  display: none; position: absolute; top: 100%; left: 0; right: 0;
  background: var(--white); border: 1px solid var(--gray-2);
  border-radius: var(--radius-sm); box-shadow: var(--shadow-md);
  padding: 12px 16px; font-size: .88rem; color: var(--text-sub);
  z-index: 200;
}

/* =====================================================
   Hero Banner
   ===================================================== */
.hero {
  position: relative; min-height: 580px; overflow: hidden;
  display: flex; align-items: center;
}
.hero-bg {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 40%, var(--purple-deep) 100%);
}
.hero-bg img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: .38;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(26,26,46,.85) 0%, rgba(26,26,46,.2) 100%);
}
.hero-content {
  position: relative; z-index: 2; max-width: 620px; padding: 80px 0;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2);
  color: var(--cherry); padding: 5px 14px; border-radius: 50px;
  font-size: .8rem; font-weight: 600; margin-bottom: 22px; letter-spacing: .5px;
}
.hero h1 {
  font-size: 3rem; font-weight: 900; color: var(--white); line-height: 1.2;
  margin-bottom: 18px; text-shadow: 0 2px 20px rgba(0,0,0,.3);
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--cherry), var(--rose-gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  color: rgba(255,255,255,.78); font-size: 1.05rem; line-height: 1.8;
  margin-bottom: 32px; max-width: 500px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats {
  position: relative; z-index: 2;
  display: flex; gap: 36px; margin-top: 48px;
}
.hero-stat { color: var(--white); }
.hero-stat .num {
  font-size: 1.8rem; font-weight: 800;
  background: linear-gradient(135deg, var(--cherry), var(--rose-gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat .label { font-size: .8rem; color: rgba(255,255,255,.6); margin-top: 2px; }

/* =====================================================
   视频卡片
   ===================================================== */
.video-card {
  border-radius: var(--radius-md); overflow: hidden;
  background: var(--white); box-shadow: var(--shadow-sm);
  transition: var(--transition); cursor: pointer;
}
.video-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.video-thumb {
  position: relative; overflow: hidden; aspect-ratio: 16/9;
  background: var(--dark);
}
.video-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.play-btn {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: var(--transition);
  background: rgba(61,26,92,.45);
}
.video-card:hover .play-btn { opacity: 1; }
.play-icon {
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(255,255,255,.92);
  display: flex; align-items: center; justify-content: center;
  transform: scale(.8); transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,.3);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon svg { width: 22px; height: 22px; fill: var(--purple-mid); margin-left: 3px; }
.video-duration {
  position: absolute; bottom: 8px; right: 10px;
  background: rgba(0,0,0,.7); color: var(--white);
  font-size: .72rem; padding: 2px 7px; border-radius: 4px; font-weight: 600;
}
.video-tag {
  position: absolute; top: 10px; left: 10px;
}
.video-info { padding: 14px 16px; }
.video-info h3 {
  font-size: .95rem; font-weight: 700; color: var(--text-main);
  margin-bottom: 8px; line-height: 1.4;
  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: .78rem; color: var(--text-sub);
}
.video-meta .views { display: flex; align-items: center; gap: 4px; }
.video-meta .views svg { width: 13px; height: 13px; fill: var(--text-sub); }
.video-stats {
  display: flex; gap: 12px; font-size: .78rem; color: var(--text-sub); margin-top: 8px;
}
.video-stats span { display: flex; align-items: center; gap: 3px; }

/* =====================================================
   功能模块卡片
   ===================================================== */
.feature-card {
  padding: 28px 24px; border-radius: var(--radius-md);
  background: var(--white); box-shadow: var(--shadow-sm);
  transition: var(--transition); border: 1px solid transparent;
}
.feature-card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-md);
  border-color: var(--purple-pale);
}
.feature-icon {
  width: 52px; height: 52px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; margin-bottom: 16px;
  background: linear-gradient(135deg, var(--purple-pale), var(--rose-pale));
}
.feature-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: var(--purple-deep); }
.feature-card p { font-size: .88rem; color: var(--text-sub); line-height: 1.65; }

/* =====================================================
   专家卡片
   ===================================================== */
.expert-card {
  background: var(--white); border-radius: var(--radius-md);
  overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition);
}
.expert-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.expert-photo {
  position: relative; height: 220px; overflow: hidden;
  background: linear-gradient(135deg, var(--purple-pale), var(--rose-pale));
}
.expert-photo img { width: 100%; height: 100%; object-fit: cover; }
.expert-badge {
  position: absolute; bottom: 12px; left: 12px;
  background: linear-gradient(135deg, var(--purple-mid), var(--rose-gold));
  color: var(--white); padding: 4px 12px; border-radius: 50px;
  font-size: .75rem; font-weight: 700;
}
.expert-info { padding: 18px 20px; }
.expert-info h3 { font-size: 1.05rem; font-weight: 800; color: var(--purple-deep); margin-bottom: 4px; }
.expert-title { font-size: .82rem; color: var(--rose-gold); font-weight: 600; margin-bottom: 10px; }
.expert-desc { font-size: .84rem; color: var(--text-sub); line-height: 1.6; margin-bottom: 14px; }
.expert-awards { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.award-tag {
  font-size: .72rem; padding: 2px 8px; border-radius: 4px;
  background: var(--rose-pale); color: var(--rose-gold); font-weight: 600;
}
.expert-actions { display: flex; gap: 8px; }
.expert-actions a {
  flex: 1; text-align: center; padding: 7px 12px; border-radius: var(--radius-sm);
  font-size: .82rem; font-weight: 600; transition: var(--transition);
}
.btn-contact { background: var(--purple-pale); color: var(--purple-mid); }
.btn-contact:hover { background: var(--purple-mid); color: var(--white); }
.btn-works { background: var(--rose-pale); color: var(--rose-gold); }
.btn-works:hover { background: var(--rose-gold); color: var(--white); }

/* =====================================================
   评价卡片
   ===================================================== */
.review-card {
  background: var(--white); border-radius: var(--radius-md);
  padding: 24px; box-shadow: var(--shadow-sm); transition: var(--transition);
  border-left: 4px solid var(--rose-gold);
}
.review-card:hover { box-shadow: var(--shadow-md); }
.review-stars { color: #FFB800; font-size: 1rem; margin-bottom: 10px; letter-spacing: 2px; }
.review-text { font-size: .9rem; color: var(--text-main); line-height: 1.7; margin-bottom: 14px; font-style: italic; }
.reviewer { display: flex; align-items: center; gap: 10px; }
.reviewer-avatar {
  width: 38px; height: 38px; border-radius: 50%;
  background: linear-gradient(135deg, var(--purple-mid), var(--rose-gold));
  display: flex; align-items: center; justify-content: center;
  color: var(--white); font-weight: 700; font-size: .9rem; flex-shrink: 0;
}
.reviewer-name { font-weight: 700; font-size: .88rem; color: var(--text-main); }
.reviewer-info { font-size: .76rem; color: var(--text-sub); }

/* =====================================================
   FAQ
   ===================================================== */
.faq-item {
  border: 1px solid var(--gray-2); border-radius: var(--radius-md);
  overflow: hidden; margin-bottom: 12px; transition: var(--transition);
}
.faq-item.open { border-color: var(--purple-pale); box-shadow: var(--shadow-sm); }
.faq-q {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px; cursor: pointer; font-weight: 600;
  color: var(--text-main); font-size: .95rem; gap: 12px;
  background: var(--white); transition: var(--transition);
}
.faq-q:hover { background: var(--gray-1); }
.faq-item.open .faq-q { color: var(--purple-mid); background: var(--purple-pale); }
.faq-icon {
  width: 24px; height: 24px; border-radius: 50%; flex-shrink: 0;
  background: var(--gray-2); display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; font-weight: 300; transition: var(--transition);
}
.faq-item.open .faq-icon { background: var(--purple-mid); color: var(--white); transform: rotate(45deg); }
.faq-a {
  display: none; padding: 0 22px 18px; font-size: .9rem;
  color: var(--text-sub); line-height: 1.75;
}
.faq-item.open .faq-a { display: block; }

/* =====================================================
   合作品牌 Logo 墙
   ===================================================== */
.partner-wall {
  display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: center;
}
.partner-logo {
  padding: 12px 24px; border-radius: var(--radius-sm);
  background: var(--white); border: 1.5px solid var(--gray-2);
  font-weight: 700; font-size: .9rem; color: var(--text-sub);
  transition: var(--transition); white-space: nowrap;
}
.partner-logo:hover { border-color: var(--purple-mid); color: var(--purple-mid); box-shadow: var(--shadow-sm); }

/* =====================================================
   社区功能区
   ===================================================== */
.community-card {
  background: linear-gradient(135deg, var(--purple-deep), var(--purple-mid));
  border-radius: var(--radius-lg); padding: 32px 28px; color: var(--white);
  position: relative; overflow: hidden; transition: var(--transition);
}
.community-card::before {
  content: ''; position: absolute; top: -30px; right: -30px;
  width: 120px; height: 120px; border-radius: 50%;
  background: rgba(255,255,255,.06);
}
.community-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.community-card .icon { font-size: 2.2rem; margin-bottom: 14px; }
.community-card h3 { font-size: 1.1rem; font-weight: 800; margin-bottom: 8px; }
.community-card p { font-size: .85rem; opacity: .8; line-height: 1.6; margin-bottom: 16px; }
.community-card .cc-link {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--cherry); font-size: .85rem; font-weight: 600;
}
.community-card .cc-link:hover { text-decoration: underline; }

/* =====================================================
   AI 赋能区
   ===================================================== */
.ai-card {
  background: var(--white); border-radius: var(--radius-md);
  padding: 26px 22px; box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--purple-mid); transition: var(--transition);
}
.ai-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.ai-card .ai-num {
  font-size: 2.5rem; font-weight: 900; line-height: 1;
  background: linear-gradient(135deg, var(--purple-mid), var(--rose-gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 12px;
}
.ai-card h3 { font-size: 1rem; font-weight: 700; color: var(--purple-deep); margin-bottom: 8px; }
.ai-card p { font-size: .86rem; color: var(--text-sub); line-height: 1.65; }

/* =====================================================
   联系我们
   ===================================================== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-info h3 { font-size: 1.2rem; font-weight: 800; color: var(--purple-deep); margin-bottom: 20px; }
.contact-item {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 14px 0; border-bottom: 1px solid var(--gray-2);
}
.contact-item:last-child { border-bottom: none; }
.contact-item .ci-icon {
  width: 40px; height: 40px; border-radius: var(--radius-sm); flex-shrink: 0;
  background: var(--purple-pale); display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
}
.contact-item .ci-label { font-size: .78rem; color: var(--text-sub); margin-bottom: 2px; }
.contact-item .ci-val { font-size: .92rem; font-weight: 600; color: var(--text-main); }
.qr-wrap { display: flex; gap: 24px; flex-wrap: wrap; }
.qr-box {
  text-align: center; flex: 1; min-width: 120px;
}
.qr-box canvas { border-radius: var(--radius-sm); border: 3px solid var(--purple-pale); }
.qr-box p { font-size: .78rem; color: var(--text-sub); margin-top: 8px; font-weight: 600; }

/* =====================================================
   社交分享
   ===================================================== */
.share-bar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 16px 20px; background: var(--gray-1); border-radius: var(--radius-md);
}
.share-bar .share-label { font-size: .85rem; color: var(--text-sub); font-weight: 600; }
.share-btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 6px 14px; border-radius: 50px; font-size: .8rem; font-weight: 600;
  transition: var(--transition);
}
.share-wechat { background: #07C160; color: var(--white); }
.share-weibo  { background: #E6162D; color: var(--white); }
.share-douyin { background: var(--dark); color: var(--white); }
.share-bili   { background: #00A1D6; color: var(--white); }
.share-btn:hover { opacity: .85; transform: translateY(-2px); }

/* =====================================================
   页脚
   ===================================================== */
#site-footer {
  background: var(--dark); color: rgba(255,255,255,.75);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand .logo-area img { width: 40px; height: 40px; }
.footer-brand .logo-text .name { color: var(--white); -webkit-text-fill-color: var(--white); }
.footer-brand .logo-text .slogan { color: rgba(255,255,255,.5); }
.footer-desc {
  margin-top: 14px; font-size: .85rem; line-height: 1.75;
  color: rgba(255,255,255,.55); max-width: 280px;
}
.footer-col h4 {
  font-size: .9rem; font-weight: 700; color: var(--white);
  margin-bottom: 16px; padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: .84rem; color: rgba(255,255,255,.55); transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--rose-gold); padding-left: 4px; }
.footer-bottom {
  padding: 18px 0; display: flex; align-items: center;
  justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: .8rem; color: rgba(255,255,255,.4);
}
.footer-bottom a { color: rgba(255,255,255,.4); }
.footer-bottom a:hover { color: var(--rose-gold); }
.footer-icp { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }

/* =====================================================
   面包屑
   ===================================================== */
.breadcrumb {
  padding: 14px 0; font-size: .84rem; color: var(--text-sub);
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
}
.breadcrumb a { color: var(--purple-mid); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { color: var(--gray-3); }

/* =====================================================
   页面 Hero（内页）
   ===================================================== */
.page-hero {
  background: linear-gradient(135deg, var(--purple-deep) 0%, var(--purple-mid) 60%, var(--rose-gold) 100%);
  padding: 56px 0 48px; color: var(--white);
}
.page-hero h1 { font-size: 2.2rem; font-weight: 900; margin-bottom: 10px; }
.page-hero p { font-size: 1rem; opacity: .8; max-width: 520px; }

/* =====================================================
   弹幕效果
   ===================================================== */
.danmu-wrap {
  position: relative; height: 48px; overflow: hidden;
  background: rgba(61,26,92,.06); border-radius: var(--radius-sm);
  margin-bottom: 20px;
}
.danmu-track {
  display: flex; gap: 40px; white-space: nowrap;
  animation: danmu-scroll 28s linear infinite;
}
.danmu-track:hover { animation-play-state: paused; }
.danmu-item {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .82rem; color: var(--purple-mid); padding: 0 12px;
  height: 48px;
}
.danmu-item .d-avatar {
  width: 22px; height: 22px; border-radius: 50%;
  background: linear-gradient(135deg, var(--purple-mid), var(--rose-gold));
  display: flex; align-items: center; justify-content: center;
  color: var(--white); font-size: .65rem; font-weight: 700; flex-shrink: 0;
}
@keyframes danmu-scroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* =====================================================
   加入社区引导
   ===================================================== */
.join-guide {
  background: linear-gradient(135deg, var(--rose-pale), var(--purple-pale));
  border-radius: var(--radius-lg); padding: 40px 36px;
}
.join-steps { display: flex; gap: 0; margin-top: 28px; position: relative; }
.join-steps::before {
  content: ''; position: absolute; top: 20px; left: 20px; right: 20px; height: 2px;
  background: linear-gradient(90deg, var(--purple-mid), var(--rose-gold));
}
.join-step { flex: 1; text-align: center; position: relative; padding-top: 0; }
.step-num {
  width: 40px; height: 40px; border-radius: 50%; margin: 0 auto 12px;
  background: linear-gradient(135deg, var(--purple-mid), var(--rose-gold));
  color: var(--white); font-weight: 800; font-size: .95rem;
  display: flex; align-items: center; justify-content: center;
  position: relative; z-index: 1; box-shadow: 0 4px 12px rgba(107,63,160,.3);
}
.join-step h4 { font-size: .9rem; font-weight: 700; color: var(--purple-deep); margin-bottom: 4px; }
.join-step p { font-size: .8rem; color: var(--text-sub); }

/* =====================================================
   响应式
   ===================================================== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  .sec-head h2 { font-size: 1.6rem; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .join-steps { flex-direction: column; gap: 20px; }
  .join-steps::before { display: none; }
  #main-nav {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: var(--white); flex-direction: column; padding: 12px 20px 20px;
    box-shadow: var(--shadow-md); border-top: 1px solid var(--gray-2);
    gap: 2px;
  }
  #main-nav.open { display: flex; }
  #main-nav a { padding: 10px 14px; }
  .nav-toggle { display: flex; }
  .header-search { display: none; }
  .hero-content { padding: 60px 0; }
}

@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.7rem; }
  .hero-actions { flex-direction: column; }
  .btn { justify-content: center; }
  .section { padding: 48px 0; }
}

/* =====================================================
   懒加载占位
   ===================================================== */
img[data-src] { background: var(--gray-2); min-height: 80px; }

/* =====================================================
   滚动动画
   ===================================================== */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.fade-in.visible { opacity: 1; transform: none; }

/* =====================================================
   视频模态框
   ===================================================== */
.modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 9999;
  background: rgba(0,0,0,.85); align-items: center; justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal-box {
  background: var(--dark); border-radius: var(--radius-lg);
  width: 90%; max-width: 820px; overflow: hidden;
  box-shadow: 0 24px 80px rgba(0,0,0,.6);
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; border-bottom: 1px solid rgba(255,255,255,.1);
}
.modal-header h3 { color: var(--white); font-size: 1rem; font-weight: 700; }
.modal-close {
  color: rgba(255,255,255,.6); font-size: 1.5rem; line-height: 1;
  cursor: pointer; transition: var(--transition);
}
.modal-close:hover { color: var(--white); }
.modal-video {
  aspect-ratio: 16/9; background: var(--dark-2);
  display: flex; align-items: center; justify-content: center;
}
.modal-video-placeholder {
  text-align: center; color: rgba(255,255,255,.5);
}
.modal-video-placeholder .big-play {
  width: 72px; height: 72px; border-radius: 50%;
  background: rgba(255,255,255,.1); border: 2px solid rgba(255,255,255,.2);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px; font-size: 2rem;
}