:root {
  --cream: #fff7ea;
  --cream-2: #fffdf7;
  --ink: #13213a;
  --blue: #1e3a6d;
  --blue-soft: #e8efff;
  --orange: #ff8a3d;
  --orange-soft: #fff0df;
  --purple: #9c7af2;
  --purple-soft: #f2edff;
  --line: rgba(30, 58, 109, 0.14);
  --shadow: 0 20px 60px rgba(19, 33, 58, 0.12);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 4%, rgba(255, 138, 61, 0.18), transparent 32%),
    radial-gradient(circle at 92% 10%, rgba(156, 122, 242, 0.16), transparent 30%),
    linear-gradient(180deg, var(--cream), #fff 42%, #f7f9ff 100%);
  line-height: 1.75;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(255, 253, 247, 0.86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 16px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  box-shadow: 0 12px 30px rgba(30, 58, 109, 0.24);
}
.brand-text { color: var(--blue); }
.site-nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.nav-link {
  padding: 9px 12px;
  border-radius: 999px;
  color: rgba(19, 33, 58, 0.78);
  font-size: 15px;
}
.nav-link:hover, .nav-link.is-active { background: var(--blue); color: #fff; }
.nav-toggle { display: none; border: 0; color: #fff; background: var(--blue); border-radius: 999px; padding: 8px 14px; }

.section-wrap { width: min(var(--max), calc(100% - 36px)); margin: 0 auto; }
.hero, .sub-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.9fr);
  gap: 48px;
  align-items: center;
  padding: 70px 0 38px;
}
.sub-hero { padding-top: 56px; }
.hero-copy h1, .sub-hero h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 68px);
  line-height: 1.06;
  letter-spacing: -1.4px;
  color: var(--blue);
}
.sub-hero h1 { font-size: clamp(32px, 4.2vw, 56px); }
.hero-lead, .sub-hero p { font-size: 18px; color: rgba(19, 33, 58, 0.78); }
.eyebrow {
  margin: 0 0 12px;
  color: var(--orange);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 13px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.btn, .chip-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 800;
}
.btn-primary { background: var(--orange); color: #fff; box-shadow: 0 14px 30px rgba(255, 138, 61, 0.28); }
.btn-soft { background: var(--blue-soft); color: var(--blue); border-color: var(--line); }
.text-link { color: var(--blue); font-weight: 800; border-bottom: 2px solid rgba(255, 138, 61, 0.55); }
.domain-card {
  margin-top: 24px;
  width: min(100%, 560px);
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,.72);
  box-shadow: 0 12px 36px rgba(19, 33, 58, 0.08);
}
.domain-card span { display: block; color: rgba(19,33,58,.62); font-size: 14px; }
.domain-card strong { display: block; margin-top: 4px; word-break: break-all; color: var(--blue); }
.hero-visual, .visual-panel, .sub-hero img {
  border-radius: var(--radius-xl);
  filter: drop-shadow(0 24px 50px rgba(30, 58, 109, 0.14));
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin: 76px 0 24px;
}
.section-head h2, .panel h2, .split-note h2, .challenge h2, .join-card h2, .contact-strip h2, .feedback-form h2 {
  margin: 0;
  color: var(--blue);
  font-size: clamp(26px, 3vw, 42px);
  line-height: 1.18;
}
.section-head.compact { display: block; margin: 0 0 24px; }
.section-head.centered { display: block; text-align: center; max-width: 720px; margin-left: auto; margin-right: auto; }
.card-grid { display: grid; gap: 22px; }
.list-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.playlist-card, .video-card, .rating-card, .panel, .quote-card, .circle-card, .feedback-form, .split-note, .join-card, .contact-strip {
  background: rgba(255,255,255,0.76);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 44px rgba(19, 33, 58, 0.08);
}
.playlist-card, .video-card { overflow: hidden; }
.card-body { padding: 20px; }
.card-body h3, .card-body h2, .rating-card h3, .rating-card h2, .topic-list h3, .quote-card h3, .group-list h3 { margin: 0 0 8px; color: var(--blue); }
.card-body p, .rating-card p, .quote-card p, .panel p, .split-note p, .join-card p { color: rgba(19, 33, 58, 0.75); }
.tag {
  display: inline-flex;
  margin-bottom: 10px;
  padding: 5px 10px;
  border-radius: 999px;
  color: var(--blue);
  background: var(--purple-soft);
  font-size: 13px;
  font-weight: 800;
}
.chip-button { background: var(--cream); color: var(--blue); border-color: var(--line); }
.chip-button.is-liked { background: var(--orange); color: #fff; }

.split-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px;
  margin-top: 36px;
}
.mini-stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; min-width: 360px; }
.mini-stat-grid span {
  display: grid;
  gap: 3px;
  padding: 16px;
  border-radius: 18px;
  background: var(--blue-soft);
  text-align: center;
}
.mini-stat-grid b { font-size: 26px; color: var(--blue); }
.two-col, .community-layout, .contact-layout, .script-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
  gap: 24px;
  align-items: stretch;
  margin-top: 72px;
}
.panel { padding: 28px; }
.topic-list { display: grid; gap: 14px; }
.topic-list article, .group-list article {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px;
  border-radius: 18px;
  background: var(--cream-2);
  border: 1px solid var(--line);
}
.topic-index, .icon-dot {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: var(--orange-soft);
  color: var(--orange);
  font-weight: 900;
}
.rating-grid, .type-score-grid, .values-grid, .circle-grid, .video-grid, .feed-grid, .rating-rules {
  display: grid;
  gap: 20px;
}
.rating-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.rating-card, .values-grid article, .rating-rules article { padding: 24px; }
.stars { color: var(--orange); letter-spacing: 2px; font-size: 24px; margin-bottom: 10px; }
.circles-section { margin-top: 80px; }
.circle-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.circle-card { padding: 22px; text-align: center; }
.circle-card img { width: 92px; margin: 0 auto 12px; }
.circle-card span { display: block; color: var(--blue); font-weight: 900; font-size: 20px; }
.circle-card small { color: rgba(19,33,58,.62); }
.challenge, .activity-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, .8fr);
  align-items: center;
  gap: 28px;
  margin-top: 84px;
  padding: 34px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--blue), #2e235d);
  color: #fff;
  box-shadow: var(--shadow);
}
.challenge h2, .challenge p, .activity-panel h2, .activity-panel p { color: #fff; }
.challenge .btn-primary { background: #fff; color: var(--blue); }
.feed-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.quote-card { display: flex; gap: 14px; padding: 20px; }
.quote-card img { width: 58px; height: 58px; flex: 0 0 auto; }
.quote-card span { color: var(--orange); font-weight: 800; font-size: 14px; }
.join-card, .contact-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 30px;
  margin-top: 76px;
}
.faq-section { margin-bottom: 86px; }
.faq-list { display: grid; gap: 14px; max-width: 880px; margin: 0 auto; }
.faq-item { border: 1px solid var(--line); border-radius: 18px; background: #fff; overflow: hidden; }
.faq-item button { width: 100%; text-align: left; border: 0; background: transparent; padding: 18px 22px; color: var(--blue); font-weight: 900; cursor: pointer; }
.faq-item p { margin: 0; padding: 0 22px 18px; color: rgba(19,33,58,.72); }
.faq-item:not(.is-open) p { display: none; }

.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; }
.filter-pill { border: 1px solid var(--line); background: #fff; color: var(--blue); border-radius: 999px; padding: 10px 16px; cursor: pointer; font-weight: 800; }
.filter-pill.is-active { background: var(--blue); color: #fff; }
.editorial-panel { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 48px; }
.values-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 44px; }
.values-grid article, .rating-rules article { border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; box-shadow: 0 12px 36px rgba(19,33,58,.07); }
.timeline-section { margin-top: 72px; }
.timeline-list, .ordered-card-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.timeline-list li, .ordered-card-list li, .clean-list li {
  display: grid;
  gap: 4px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}
.clean-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.clean-list span, .timeline-list span, .ordered-card-list span { color: rgba(19,33,58,.68); }
.group-list { display: grid; gap: 14px; }
.group-list img { width: 54px; height: 54px; }
.hot-panel { background: linear-gradient(180deg, #fff, var(--orange-soft)); }
.activity-panel { background: linear-gradient(135deg, #2b3f78, #7250c7); }
.score-table { display: grid; gap: 10px; }
.score-row { display: grid; grid-template-columns: 1.1fr .7fr 1.6fr 1fr; gap: 14px; padding: 16px; background: #fff; border: 1px solid var(--line); border-radius: 18px; }
.score-row.head { background: var(--blue); color: #fff; font-weight: 900; }
.type-score-grid, .rating-rules { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.rating-rules { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.video-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.script-panel { align-items: center; background: rgba(255,255,255,.72); border: 1px solid var(--line); border-radius: var(--radius-xl); padding: 32px; box-shadow: var(--shadow); }
.feedback-form { padding: 28px; display: grid; gap: 14px; }
.feedback-form label { display: grid; gap: 8px; color: var(--blue); font-weight: 900; }
.feedback-form input, .feedback-form textarea, .feedback-form select { width: 100%; border: 1px solid var(--line); border-radius: 14px; padding: 12px 14px; background: #fff; color: var(--ink); }
.form-note { margin: 0; color: rgba(19,33,58,.66); }
.site-footer { margin-top: 80px; padding: 46px clamp(18px, 4vw, 56px) 24px; background: var(--blue); color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 24px; max-width: var(--max); margin: 0 auto; }
.footer-grid p { color: rgba(255,255,255,.76); }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; max-width: var(--max); margin: 30px auto 0; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.18); color: rgba(255,255,255,.76); }

@media (max-width: 980px) {
  .nav-toggle { display: inline-flex; }
  .site-nav { display: none; position: absolute; top: 76px; left: 18px; right: 18px; padding: 16px; background: #fff; border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); }
  .site-nav.is-open { display: grid; grid-template-columns: repeat(2, 1fr); }
  .hero, .sub-hero, .two-col, .community-layout, .contact-layout, .script-panel, .challenge, .activity-panel { grid-template-columns: 1fr; }
  .list-grid, .rating-grid, .feed-grid, .video-grid, .values-grid, .type-score-grid, .rating-rules { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .circle-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mini-stat-grid { min-width: 0; }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .site-header { align-items: center; }
  .brand-text { display: none; }
  .hero, .sub-hero { padding-top: 38px; gap: 28px; }
  .hero-copy h1, .sub-hero h1 { letter-spacing: -0.6px; }
  .section-head, .split-note, .join-card, .contact-strip, .editorial-panel { display: block; }
  .section-head .text-link { display: inline-flex; margin-top: 10px; }
  .list-grid, .rating-grid, .feed-grid, .video-grid, .values-grid, .type-score-grid, .rating-rules, .circle-grid, .mini-stat-grid { grid-template-columns: 1fr; }
  .score-row { grid-template-columns: 1fr; }
  .footer-bottom { display: grid; }
}