:root {
  --bg: #0B0B0D;
  --panel: #15151A;
  --panel-2: #1B1B21;
  --ink: #F7F2E8;
  --soft: #B2A895;
  --muted: #807A70;
  --brand: #FFD64C;
  --brand-2: #FFB522;
  --accent: #FF8B26;
  --green: #9ED49B;
  --line: rgba(255,214,92,.13);
  --shadow: 0 18px 55px rgba(0,0,0,.42);
  --radius: 16px;
  --trans: all .3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background-color: var(--bg);
  color: var(--soft);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; object-fit: cover; }
a { color: inherit; text-decoration: none; transition: var(--trans); }
ul { list-style: none; }
.container { width: min(1200px, calc(100% - 40px)); margin: 0 auto; }
section { padding: 80px 0; border-bottom: 1px solid var(--line); }
section:last-of-type { border-bottom: none; }

/* Typography */
h1, h2, h3, h4 { color: var(--ink); font-weight: 700; line-height: 1.2; }
h1 { font-size: clamp(36px, 5vw, 60px); letter-spacing: -0.02em; margin-bottom: 24px; }
h2 { font-size: clamp(26px, 3vw, 34px); }
h3 { font-size: 20px; }
.text-brand { color: var(--brand); }
.text-accent { color: var(--accent); }

/* Section Header */
.sec-header { margin-bottom: 48px; }
.sec-title-row { display: flex; align-items: baseline; gap: 16px; margin-bottom: 16px; }
.sec-num { font-family: monospace; font-size: 13px; color: var(--brand); letter-spacing: 0.08em; }
.sec-desc { text-align: right; font-size: 13px; color: var(--muted); max-width: 40%; margin-left: auto; }
.sec-line { height: 1px; background: var(--line); width: 100%; }

/* 00 提示条 */
.top-bar {
  height: 36px; background: var(--panel-2); border-bottom: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center; font-size: 12.5px;
}
.top-bar .container { display: flex; align-items: center; justify-content: space-between; }
.top-badge { font-size: 11px; color: var(--brand); border: 1px solid var(--brand); padding: 0 6px; border-radius: 4px; margin-right: 8px; }
.top-bar a { color: var(--brand); text-decoration: underline; text-underline-offset: 2px; }

/* 01 导航 */
.nav-header {
  position: sticky; top: 0; background: var(--bg); border-bottom: 1px solid var(--line); z-index: 100;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 12px; font-size: 18px; font-weight: 800; color: var(--ink); }
.brand img { height: 32px; border-radius: 8px; }
.nav-links { display: flex; gap: 24px; font-size: 14px; color: var(--soft); }
.nav-links a:hover { color: var(--ink); }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--brand); color: var(--bg); font-weight: 700; border-radius: 999px;
  padding: 0 24px; height: 38px; font-size: 14px; border: none; cursor: pointer;
}
.btn:hover { background: var(--brand-2); transform: translateY(-1px); }
.btn-ghost { background: transparent; border: 1px solid var(--line); color: var(--ink); }
.btn-ghost:hover { background: var(--panel); border-color: var(--muted); }

/* 02 首屏 */
.hero { padding: 100px 0 60px; text-align: center; }
.hero-badge {
  display: inline-block; padding: 4px 14px; border-radius: 999px;
  background: var(--panel-2); border: 1px solid var(--line); font-size: 13px; color: var(--brand); margin-bottom: 24px;
}
.hero p.sub { font-size: 16px; max-width: 680px; margin: 0 auto 40px; }
.hero-btns { display: flex; justify-content: center; gap: 16px; margin-bottom: 24px; }
.hero-foot { font-size: 12.5px; color: var(--muted); }
.hero-strip {
  margin-top: 60px; display: flex; gap: 16px; overflow: hidden; white-space: nowrap;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.hero-strip-track { display: flex; gap: 16px; animation: scroll 45s linear infinite; }
.hero-strip:hover .hero-strip-track { animation-play-state: paused; }
.hero-strip-track img { height: 240px; width: auto; aspect-ratio: 3/4; border-radius: 12px; }
@keyframes scroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* 03 品类 */
.cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.cat-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 24px; display: flex; flex-direction: column; justify-content: space-between; height: 240px; transition: var(--trans);
}
.cat-card:hover { border-color: var(--brand); transform: translateY(-4px); }
.cat-num { font-size: 48px; font-weight: 800; color: var(--line); line-height: 1; }
.cat-name { font-size: 18px; font-weight: 700; color: var(--ink); margin: 16px 0 8px; }
.cat-desc { font-size: 13px; color: var(--muted); }
.cat-arrow { font-size: 20px; color: var(--brand); text-align: right; margin-top: auto; }

/* 04 索引 */
.index-wrap { display: flex; gap: 40px; }
.index-list { width: 35%; display: flex; flex-direction: column; gap: 8px; }
.index-item {
  padding: 16px 20px; cursor: pointer; border-left: 3px solid transparent;
  background: var(--panel); border-radius: 0 12px 12px 0; transition: var(--trans);
}
.index-item.active { border-left-color: var(--brand); background: var(--panel-2); }
.index-item h3 { font-size: 16px; margin-bottom: 4px; }
.index-item.active h3 { color: var(--brand); }
.index-item p { font-size: 12.5px; color: var(--muted); }
.index-content { width: 65%; display: none; }
.index-content.active { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.idx-card img { width: 100%; aspect-ratio: 3/4; border-radius: 12px; margin-bottom: 12px; }
.idx-card h4 { font-size: 15px; color: var(--ink); }

/* 05 排行 */
.list-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 24px; }
.list-header a { font-size: 14px; color: var(--brand); }
.rank-list { display: flex; flex-direction: column; }
.rank-item { display: flex; align-items: center; padding: 20px 0; border-bottom: 1px solid var(--line); transition: var(--trans); }
.rank-item:hover { background: var(--panel-2); padding-left: 16px; border-radius: 8px; }
.rank-num { font-size: 14px; font-weight: 700; color: var(--accent); width: 40px; }
.rank-title { flex: 1; font-size: 16px; font-weight: 700; color: var(--ink); }
.rank-title span { font-weight: 400; font-size: 13px; color: var(--muted); margin-left: 12px; }
.rank-heat { font-size: 13px; color: var(--muted); }

/* 06 合集 */
.col-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.col-card { position: relative; border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3; }
.col-card img { width: 100%; height: 100%; transition: var(--trans); }
.col-card:hover img { transform: scale(1.05); }
.col-mask {
  position: absolute; inset: 0; padding: 24px; display: flex; flex-direction: column; justify-content: flex-end;
  background: linear-gradient(transparent 40%, rgba(0,0,0,.85)); pointer-events: none;
}
.col-mask h3 { font-size: 20px; margin-bottom: 4px; }
.col-mask p { font-size: 13px; color: #ddd; }

/* 07 流程 */
.flow-wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; background: var(--panel); padding: 40px; border-radius: var(--radius); border: 1px solid var(--line); }
.flow-step { flex: 1; text-align: center; position: relative; }
.flow-step::after {
  content: ''; position: absolute; top: 24px; left: 50%; width: 100%; border-top: 1px dashed var(--line); z-index: 1;
}
.flow-step:last-child::after { display: none; }
.flow-num {
  width: 48px; height: 48px; border-radius: 50%; background: var(--panel-2); border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-weight: 700; color: var(--brand); position: relative; z-index: 2;
}
.flow-step h4 { font-size: 16px; margin-bottom: 8px; }
.flow-step p { font-size: 13px; color: var(--muted); }

/* 08 转化 */
.cta-box {
  background: var(--panel); border: 1px solid var(--line); border-radius: 24px;
  padding: 60px 40px; text-align: center; box-shadow: var(--shadow);
}
.cta-box h2 { font-size: clamp(26px, 3vw, 34px); margin-bottom: 16px; }
.cta-box p { margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; }
.cta-info { margin-top: 24px; font-size: 13px; color: var(--muted); display: flex; justify-content: center; gap: 24px; }
.cta-small { margin-top: 16px; font-size: 12px; color: var(--muted); }

/* 09 反馈 */
.review-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.review-item { border-left: 2px solid var(--brand); padding-left: 20px; }
.review-text { font-size: 15px; color: var(--ink); font-style: italic; margin-bottom: 16px; }
.review-user { font-size: 13px; font-weight: 700; color: var(--brand); }
.review-meta { font-size: 12px; color: var(--muted); }

/* 10 FAQ */
.faq-list { max-width: 800px; margin: 0 auto; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  width: 100%; text-align: left; background: none; border: none; padding: 24px 0;
  font-size: 16px; font-weight: 700; color: var(--ink); cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
}
.faq-q::after { content: '+'; color: var(--brand); font-size: 20px; font-weight: 400; }
.faq-q.active::after { content: '-'; }
.faq-a { padding-bottom: 24px; font-size: 14px; color: var(--soft); display: none; }
.faq-a.show { display: block; }

/* 11 页脚 */
.site-footer { background: var(--panel-2); padding: 60px 0 24px; border-top: 1px solid var(--line); font-size: 14px; }
.footer-top { display: flex; justify-content: space-between; margin-bottom: 40px; flex-wrap: wrap; gap: 40px; }
.footer-brand { max-width: 300px; }
.footer-brand h2 { font-size: 24px; margin-bottom: 12px; }
.footer-links { display: flex; gap: 64px; }
.footer-col h4 { font-size: 14px; color: var(--ink); margin-bottom: 16px; }
.footer-col a { display: block; color: var(--muted); margin-bottom: 12px; font-size: 13px; }
.footer-col a:hover { color: var(--brand); }
.footer-bottom { border-top: 1px solid var(--line); padding-top: 24px; display: flex; justify-content: space-between; font-size: 12.5px; color: var(--muted); flex-wrap: wrap; gap: 16px; }

/* 吸底条 <560 */
.sticky-bar {
  display: none; position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--panel); border-top: 1px solid var(--line);
  padding: 12px 20px; z-index: 99; justify-content: space-between; align-items: center;
}

@media (max-width: 1024px) {
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .index-wrap { flex-direction: column; }
  .index-list { width: 100%; flex-direction: row; overflow-x: auto; padding-bottom: 8px; }
  .index-item { white-space: nowrap; border-left: none; border-bottom: 3px solid transparent; border-radius: 12px 12px 0 0; }
  .index-item.active { border-left: none; border-bottom-color: var(--brand); }
  .index-content { width: 100%; }
  .col-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-wrap { flex-direction: column; gap: 40px; }
  .flow-step { width: 100%; }
  .flow-step::after { display: none; }
  .review-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  section { padding: 60px 0; }
  .nav-links { display: none; }
  .hero-strip-track img { height: 180px; }
  .cat-grid { grid-template-columns: 1fr; }
  .cat-card { height: auto; }
  .col-grid { grid-template-columns: 1fr; }
  .index-content.active { grid-template-columns: 1fr; }
  .cta-info { flex-direction: column; gap: 8px; }
  .footer-links { flex-direction: column; gap: 32px; }
}

@media (max-width: 560px) {
  .top-bar .container { justify-content: center; }
  .top-bar a { display: none; }
  .sticky-bar { display: flex; }
  .site-footer { padding-bottom: 80px; }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn { width: 100%; }
}