:root {
  --bg: #F9F8F6;
  --bg-alt: #F2EFEB;
  --ink: #1A1A1A;
  --ink-2: #6B6B6B;
  --brand: #D97736;
  --brand-soft: #FDF3EC;
  --line: #E5E2DC;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.85;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; object-fit: cover; }
ul { list-style: none; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
section { margin-bottom: 104px; }

/* 01 适龄提示条 */
.age-notice {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.8);
  font-size: 13px;
  text-align: center;
  height: 36px;
  line-height: 36px;
  width: 100%;
}

/* 02 导航 */
header.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(249, 248, 246, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-left { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.nav-left img { height: 32px; width: auto; border-radius: 6px; }
.nav-links { display: flex; gap: 28px; font-size: 14px; font-weight: 500; color: var(--ink-2); }
.nav-links a:hover { color: var(--ink); }
.btn-solid {
  background: var(--brand);
  color: #fff;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition: opacity 0.2s;
  display: inline-block;
}
.btn-solid:hover { opacity: 0.9; }
.btn-outline {
  border: 1px solid var(--ink);
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.2s;
  display: inline-block;
}
.btn-outline:hover { background: var(--bg-alt); }
.mobile-menu-btn { display: none; font-size: 24px; background: none; border: none; cursor: pointer; color: var(--ink); }

/* 标题区统一样式 */
.sec-header { margin-bottom: 40px; }
.kicker { font-size: 12px; text-transform: uppercase; letter-spacing: 0.2em; color: var(--ink-2); font-weight: 600; margin-bottom: 12px; }
.sec-title { font-size: 32px; font-weight: 700; line-height: 1.3; }
.sec-desc { font-size: 16px; font-weight: 500; color: var(--ink-2); max-width: 620px; margin-top: 10px; }

/* 03 首屏 */
.hero { display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center; padding-top: 40px; }
.hero-eyebrow { font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--brand); font-weight: 600; margin-bottom: 16px; }
.hero-title { font-size: clamp(40px, 6vw, 64px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.1; margin-bottom: 20px; display: flex; align-items: center; gap: 16px; }
.hero-title img { height: 1em; width: auto; border-radius: 12px; }
.hero-claim { font-size: 20px; font-weight: 500; font-style: italic; color: var(--ink-2); margin-bottom: 20px; }
.hero-desc { font-size: 15px; line-height: 1.85; color: var(--ink-2); margin-bottom: 32px; max-width: 90%; }
.hero-actions { display: flex; gap: 16px; margin-bottom: 32px; }
.hero-tags { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 32px; max-width: 320px; }
.hero-tag { border: 1px solid var(--line); border-radius: 999px; padding: 6px 0; text-align: center; font-size: 13px; font-weight: 500; }
.hero-scenes { display: flex; flex-direction: column; gap: 20px; border-top: 1px solid var(--line); padding-top: 24px; }
.scene-item { display: flex; gap: 12px; align-items: baseline; }
.scene-time { font-weight: 700; min-width: 40px; }
.scene-text { color: var(--ink-2); font-size: 14px; }

.hero-visual { position: relative; width: 100%; }
.collage { position: relative; aspect-ratio: 4/5; width: 100%; max-width: 440px; margin: 0 auto; }
.collage img { border-radius: 16px; box-shadow: 0 18px 40px rgba(0,0,0,.16); border: 1px solid #fff; }
.collage-main { width: 62%; height: 90%; position: absolute; top: 5%; left: 19%; z-index: 2; }
.collage-sub-a { width: 34%; height: 45%; position: absolute; top: -6%; left: 0; z-index: 1; transform: rotate(-4deg); }
.collage-sub-b { width: 34%; height: 45%; position: absolute; bottom: -6%; right: 0; z-index: 3; transform: rotate(4deg); }
.hero-footer { font-size: 12px; color: var(--ink-2); margin-top: 24px; text-align: center; }

/* 04 三入口卡 */
.entry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.entry-card { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 24px; display: flex; flex-direction: column; transition: border-color 0.2s; }
.entry-card:hover { border-color: var(--brand); }
.entry-icon { font-size: 24px; margin-bottom: 16px; color: var(--brand); }
.entry-title { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.entry-desc { font-size: 14px; color: var(--ink-2); flex-grow: 1; margin-bottom: 16px; }
.entry-link { font-size: 14px; font-weight: 600; display: flex; align-items: center; gap: 4px; transition: gap 0.2s; }
.entry-card:hover .entry-link { gap: 8px; }

/* 05 为什么选我们 */
.why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.why-card { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 28px; }
.why-icon { font-size: 24px; margin-bottom: 16px; color: var(--brand); }
.why-title { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.why-desc { font-size: 14px; color: var(--ink-2); margin-bottom: 12px; }
.why-sub { font-size: 13px; color: #999; }

/* 06 热播 */
.hot-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.hot-card { background: #fff; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; transition: border-color 0.2s; }
.hot-card:hover { border-color: var(--brand); }
.hot-cover { position: relative; aspect-ratio: 3/4; width: 100%; }
.hot-cover img { width: 100%; height: 100%; }
.hot-badge { position: absolute; top: 12px; left: 12px; background: rgba(0,0,0,0.6); color: #fff; font-size: 11px; padding: 2px 8px; border-radius: 4px; }
.hot-info { padding: 16px; }
.hot-name { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.hot-genre { font-size: 13px; color: var(--ink-2); margin-bottom: 12px; }
.hot-tag { display: inline-block; border: 1px solid var(--line); padding: 2px 8px; border-radius: 999px; font-size: 12px; color: var(--ink-2); }
.hot-footer { text-align: right; margin-top: 24px; }

/* 07 排行榜 */
.rank-list { display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.rank-item { display: flex; align-items: center; padding: 16px 0; border-bottom: 1px solid var(--line); min-height: 88px; text-decoration: none; }
.rank-item:hover { background: var(--bg-alt); }
.rank-num { width: 40px; font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--ink-2); }
.rank-item:nth-child(-n+3) .rank-num { color: var(--brand); }
.rank-cover { width: 56px; height: 75px; border-radius: 6px; margin-right: 20px; flex-shrink: 0; }
.rank-cover img { width: 100%; height: 100%; border-radius: 6px; }
.rank-info { flex-grow: 1; }
.rank-name { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.rank-meta { font-size: 13px; color: var(--ink-2); }
.rank-tags { display: flex; gap: 8px; }
.rank-tag { border: 1px solid var(--line); padding: 2px 10px; border-radius: 999px; font-size: 12px; color: var(--ink-2); }

/* 08 精选片单 */
.playlist-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.playlist-card { display: block; text-decoration: none; }
.playlist-cover { aspect-ratio: 3/4; border-radius: 16px; overflow: hidden; margin-bottom: 16px; }
.playlist-cover img { width: 100%; height: 100%; transition: transform 0.3s; }
.playlist-card:hover .playlist-cover img { transform: scale(1.05); }
.playlist-kicker { font-size: 12px; text-transform: uppercase; color: var(--ink-2); font-weight: 600; margin-bottom: 4px; }
.playlist-name { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.playlist-desc { font-size: 14px; color: var(--ink-2); margin-bottom: 12px; }
.playlist-for { font-size: 13px; color: #999; }

/* 09 制作流程 */
.process-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.process-left p { font-size: 15px; color: var(--ink-2); margin-bottom: 24px; }
.process-link { font-weight: 600; font-size: 15px; color: var(--brand); border-bottom: 1px solid var(--brand); padding-bottom: 2px; }
.process-steps { display: flex; flex-direction: column; gap: 24px; }
.step-item { display: flex; gap: 16px; align-items: flex-start; }
.step-num { font-size: 28px; font-weight: 700; color: transparent; -webkit-text-stroke: 1px var(--brand); line-height: 1; }
.step-content h4 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.step-content p { font-size: 14px; color: var(--ink-2); }

/* 10 创作者 / 合作 */
.creator-layout { display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: center; }
.creator-left p { font-size: 15px; color: var(--ink-2); margin-bottom: 20px; }
.creator-actions { display: flex; gap: 16px; margin-top: 32px; }
.creator-card { background: var(--bg-alt); border-radius: 18px; padding: 28px; }
.creator-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 20px; }
.creator-checks { display: flex; flex-direction: column; gap: 16px; }
.check-item { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; }
.check-icon { color: var(--brand); font-weight: bold; }

/* 11 下载 */
.download-section { background: var(--bg-alt); padding: 64px 40px; border-radius: 24px; margin-bottom: 104px; }
.download-layout { display: grid; grid-template-columns: 1fr auto; gap: 64px; align-items: center; }
.download-left h2 { font-size: 32px; font-weight: 700; margin-bottom: 24px; }
.download-checks { display: flex; flex-direction: column; gap: 16px; margin-bottom: 32px; }
.download-actions { display: flex; flex-direction: column; gap: 16px; align-items: flex-start; }
.download-note { font-size: 13px; color: var(--ink-2); }
.qr-card { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 16px; width: 160px; text-align: center; }
.qr-card img { width: 100%; aspect-ratio: 1; border-radius: 8px; margin-bottom: 8px; }
.qr-text { font-size: 12px; color: var(--ink-2); }

/* 12 FAQ */
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-summary { display: flex; align-items: center; padding: 20px 0; cursor: pointer; list-style: none; }
.faq-summary::-webkit-details-marker { display: none; }
.faq-num { font-size: 13px; color: var(--ink-2); width: 40px; }
.faq-q { font-size: 17px; font-weight: 600; flex-grow: 1; }
.faq-icon { font-size: 20px; color: var(--ink-2); transition: transform 0.2s; }
details[open] .faq-icon { transform: rotate(45deg); }
.faq-answer { padding-left: 40px; padding-bottom: 20px; font-size: 15px; color: var(--ink-2); line-height: 1.8; }

/* 13 页脚 */
footer { background: var(--bg-alt); padding: 64px 0 64px; border-top: 1px solid var(--line); }
.footer-top { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; margin-bottom: 64px; }
.footer-brand { display: flex; flex-direction: column; gap: 16px; }
.footer-logo-row { display: flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 700; }
.footer-logo-row img { height: 36px; border-radius: 8px; }
.footer-slogan { font-size: 14px; color: var(--ink-2); }
.footer-age { font-size: 13px; color: #999; margin-top: 8px; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-col h4 { font-size: 15px; font-weight: 600; margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col a { font-size: 14px; color: var(--ink-2); }
.footer-col a:hover { color: var(--ink); }
.footer-bottom { border-top: 1px solid var(--line); padding-top: 24px; display: flex; flex-direction: column; gap: 8px; font-size: 13px; color: #999; }
.footer-time { font-size: 12px; }

/* 吸底条 */
.sticky-bar { display: none; }

/* 响应式 */
@media (max-width: 1024px) {
  .hero { gap: 40px; }
  .playlist-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 767px) {
  section { margin-bottom: 56px; }
  .mobile-menu-btn { display: block; }
  .nav-links { display: none; }
  .nav-inner { height: 56px; }
  .nav-right .btn-solid { padding: 6px 12px; font-size: 13px; }
  .hero { grid-template-columns: 1fr; gap: 40px; padding-top: 20px; }
  .hero-title { flex-direction: column; align-items: flex-start; gap: 12px; }
  .hero-title img { height: 48px; }
  .hero-desc { max-width: 100%; }
  .collage { aspect-ratio: 3/4; max-width: 100%; }
  .collage-sub-a, .collage-sub-b { display: none; }
  .collage-main { width: 100%; height: 100%; top: 0; left: 0; border-radius: 16px; }
  
  .entry-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .hot-grid { grid-template-columns: repeat(2, 1fr); }
  
  .playlist-grid { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; gap: 16px; padding-bottom: 16px; -webkit-overflow-scrolling: touch; }
  .playlist-card { flex: 0 0 62vw; scroll-snap-align: start; }
  
  .process-layout { grid-template-columns: 1fr; gap: 40px; }
  .creator-layout { grid-template-columns: 1fr; gap: 40px; }
  .download-section { padding: 40px 20px; }
  .download-layout { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .download-actions { align-items: center; }
  .qr-card { margin: 0 auto; }
  
  .footer-links { grid-template-columns: repeat(2, 1fr); }
  .footer-bottom { padding-bottom: 80px; }
  
  .rank-item { flex-wrap: wrap; }
  .rank-tags { margin-left: 96px; margin-top: 8px; width: 100%; }
  
  .sticky-bar {
    display: flex; position: fixed; bottom: 0; left: 0; width: 100%;
    background: rgba(249, 248, 246, 0.95); backdrop-filter: blur(12px);
    border-top: 1px solid var(--line); padding: 12px 20px;
    padding-bottom: calc(12px + env(safe-area-inset-bottom));
    justify-content: center; z-index: 99; transition: opacity 0.3s;
  }
  .sticky-bar.hidden { opacity: 0; pointer-events: none; }
  .sticky-btn { width: 100%; text-align: center; }
}