/* roulang page: index */
:root {
  --color-primary: #f26522;
  --color-accent: #e63946;
  --color-gold: #f4a261;
  --color-bg-dark: #14161a;
  --color-bg-panel: #1d2026;
  --color-bg-light: #f7f3ec;
  --color-text-light: #f5efe6;
  --color-text-dim: #9a8f84;
  --color-border-dark: rgba(255,255,255,0.08);
  --color-border-light: rgba(0,0,0,0.08);
  --radius-card: 16px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
  --shadow-float: 0 12px 40px rgba(0,0,0,0.45);
  --space-section: 80px;
  --space-section-mobile: 48px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-num: "DIN Alternate", "Bebas Neue", "Arial Narrow", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); background: var(--color-bg-dark); color: var(--color-text-light); line-height: 1.75; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; transition: all .25s ease; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 32px; }
.section-pad { padding: var(--space-section) 0; }
.h2 { font-size: 36px; font-weight: 800; line-height: 1.25; letter-spacing: -0.01em; margin-bottom: 16px; }
.sub-text { font-size: 16px; color: var(--color-text-dim); line-height: 1.75; max-width: 640px; }
.text-center { text-align: center; }
.text-orange { color: var(--color-primary); }

/* ===== 导航 ===== */
.site-header {
  position: fixed; top: 16px; left: 32px; right: 32px; z-index: 1000;
  background: rgba(20,22,26,0.82); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-border-dark); border-radius: var(--radius-pill); height: 64px;
  display: flex; align-items: center; justify-content: space-between; padding: 0 24px;
  transition: all .3s ease;
}
.site-header.scrolled {
  top: 0; left: 32px; right: 32px; border-radius: 0 0 20px 20px;
  background: rgba(18,20,24,0.95); box-shadow: var(--shadow-float);
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 800; color: var(--color-text-light); letter-spacing: 0.02em; }
.logo-badge { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; }
.logo-badge svg { width: 100%; height: 100%; }
.nav-menu { display: flex; align-items: center; gap: 8px; list-style: none; }
.nav-menu li a { display: block; padding: 8px 16px; font-size: 13px; font-weight: 500; color: var(--color-text-dim); border-radius: var(--radius-pill); position: relative; transition: color .25s, background .25s; }
.nav-menu li a:hover { color: var(--color-text-light); background: rgba(255,255,255,0.04); }
.nav-menu li a::after { content: ''; position: absolute; left: 16px; right: 16px; bottom: 2px; height: 2px; background: var(--color-primary); border-radius: 2px; opacity: 0; transform: scaleX(0.3); transition: all .3s ease; }
.nav-menu li a:hover::after, .nav-menu li a.active::after { opacity: 1; transform: scaleX(1); }
.nav-menu li a.active { color: var(--color-primary); }
.nav-cta { padding: 10px 24px; background: var(--color-primary); color: #1a1a1a !important; font-weight: 600; border-radius: var(--radius-pill); font-size: 13px; transition: all .25s ease; }
.nav-cta:hover { filter: brightness(1.05); transform: translateY(-1px); }
.nav-cta::after { display: none; }
.nav-toggle { display: none; width: 40px; height: 40px; background: transparent; border: 1px solid var(--color-border-dark); border-radius: 12px; align-items: center; justify-content: center; flex-direction: column; gap: 4px; }
.nav-toggle span { width: 18px; height: 2px; background: var(--color-text-light); border-radius: 2px; transition: all .3s ease; }
.nav-toggle.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ===== 按钮 ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 28px; border-radius: var(--radius-pill); font-size: 14px; font-weight: 600; border: none; transition: all .25s ease; letter-spacing: 0.02em; }
.btn-primary { background: var(--color-primary); color: #1a1a1a; }
.btn-primary:hover { filter: brightness(1.05); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(242,101,34,0.3); }
.btn-primary:active { transform: translateY(1px); box-shadow: 0 2px 8px rgba(242,101,34,0.2); }
.btn-ghost { background: transparent; border: 1px solid var(--color-border-dark); color: var(--color-text-light); }
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-1px); }
.btn-lg { min-height: 50px; padding: 0 36px; font-size: 15px; }
.btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; }

/* ===== Hero ===== */
.hero { position: relative; background: var(--color-bg-dark); padding: 140px 0 60px; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: 0; right: 0; bottom: 0; width: 45%; background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat; opacity: 0.18; }
.hero::after { content: ''; position: absolute; bottom: 0; right: 0; left: 0; height: 60px; background: linear-gradient(180deg, transparent, rgba(242,101,34,0.06)); pointer-events: none; }
.hero-inner { position: relative; z-index: 2; display: flex; align-items: center; min-height: 500px; }
.hero-left { padding-right: 40px; }
.hero-tag { display: inline-flex; align-items: center; gap: 6px; background: rgba(242,101,34,0.12); border: 1px solid rgba(242,101,34,0.3); color: var(--color-primary); font-size: 12px; font-weight: 600; padding: 6px 16px; border-radius: var(--radius-pill); margin-bottom: 24px; letter-spacing: 0.05em; }
.hero-tag::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--color-accent); }
.hero h1 { font-size: 56px; font-weight: 900; line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 24px; color: var(--color-text-light); }
.hero h1 span { color: var(--color-primary); }
.hero-lead { font-size: 16px; color: var(--color-text-dim); line-height: 1.8; margin-bottom: 32px; max-width: 520px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-points { display: flex; gap: 24px; flex-wrap: wrap; }
.hero-point { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--color-text-dim); }
.hero-point strong { color: var(--color-text-light); font-size: 18px; font-weight: 800; font-family: var(--font-num); }
.hero-right { position: relative; }
.hero-board { background: var(--color-bg-panel); border: 1px solid var(--color-border-dark); border-radius: var(--radius-card); box-shadow: var(--shadow-float); padding: 28px; position: relative; overflow: hidden; }
.hero-board::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--color-primary), rgba(242,101,34,0.1)); }
.hero-board-title { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.hero-board-title h3 { font-size: 16px; font-weight: 700; }
.hero-board-title span { font-size: 12px; color: var(--color-accent); font-weight: 600; background: rgba(230,57,70,0.12); padding: 3px 10px; border-radius: var(--radius-pill); }
.hero-board-list { list-style: none; }
.hero-board-list li { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--color-border-dark); }
.hero-board-list li:last-child { border-bottom: none; }
.hero-board-rank { width: 32px; height: 32px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-family: var(--font-num); font-size: 16px; font-weight: 800; background: rgba(255,255,255,0.06); color: var(--color-text-dim); flex-shrink: 0; }
.hero-board-list li:nth-child(1) .hero-board-rank { background: rgba(242,101,34,0.15); color: var(--color-primary); }
.hero-board-list li:nth-child(2) .hero-board-rank { background: rgba(244,162,97,0.12); color: var(--color-gold); }
.hero-board-info { flex: 1; min-width: 0; }
.hero-board-info strong { display: block; font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hero-board-info small { font-size: 12px; color: var(--color-text-dim); }
.hero-board-score { font-family: var(--font-num); font-size: 18px; font-weight: 800; color: var(--color-gold); }
.hero-board-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 16px; }
.hero-board-stat { background: rgba(255,255,255,0.03); border: 1px solid var(--color-border-dark); border-radius: 12px; padding: 12px; text-align: center; }
.hero-board-stat strong { display: block; font-family: var(--font-num); font-size: 24px; font-weight: 800; color: var(--color-primary); }
.hero-board-stat small { font-size: 12px; color: var(--color-text-dim); }

/* 痛点速览 */
.hero-mini-cards { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.mini-card { background: var(--color-bg-panel); border: 1px solid var(--color-border-dark); border-radius: 16px; padding: 20px; transition: all .3s ease; }
.mini-card:hover { border-color: rgba(242,101,34,0.4); transform: translateY(-2px); }
.mini-card strong { display: block; font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.mini-card p { font-size: 14px; color: var(--color-text-dim); line-height: 1.6; margin: 0; }

/* ===== 痛点细化 ===== */
.pain-detail { background: var(--color-bg-dark); }
.pain-inner { display: flex; gap: 48px; align-items: flex-start; }
.pain-left { flex: 0 0 38%; position: sticky; top: 100px; }
.pain-left .h2 { margin-bottom: 16px; }
.pain-right { flex: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.pain-card { background: var(--color-bg-panel); border: 1px solid var(--color-border-dark); border-radius: var(--radius-card); padding: 28px; position: relative; overflow: hidden; transition: all .3s ease; }
.pain-card:hover { border-color: rgba(242,101,34,0.4); transform: translateY(-3px); }
.pain-card .pain-num { position: absolute; top: 16px; right: 20px; font-family: var(--font-num); font-size: 40px; font-weight: 800; color: rgba(255,255,255,0.05); line-height: 1; transition: color .3s; }
.pain-card:hover .pain-num { color: rgba(242,101,34,0.2); }
.pain-icon { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 12px; background: rgba(242,101,34,0.1); color: var(--color-primary); margin-bottom: 16px; }
.pain-icon svg { width: 22px; height: 22px; stroke-width: 1.8; fill: none; stroke: currentColor; }
.pain-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.pain-card p { font-size: 14px; color: var(--color-text-dim); line-height: 1.65; margin: 0; }

/* ===== 解决方案 ===== */
.solution { background: var(--color-bg-light); color: #333; }
.solution .h2 { color: #1a1a1a; }
.solution .sub-text { color: #777; margin: 0 auto 48px; text-align: center; }
.steps-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; margin-bottom: 48px; }
.step-item { text-align: center; position: relative; padding: 20px 16px; }
.step-item:not(:last-child)::after { content: ''; position: absolute; top: 46px; right: -14px; width: 28px; height: 2px; border-top: 2px dashed rgba(0,0,0,0.12); }
.step-num { width: 48px; height: 48px; border-radius: 50%; background: var(--color-primary); color: #fff; font-size: 18px; font-weight: 700; display: inline-flex; align-items: center; justify-content: center; margin-bottom: 16px; box-shadow: 0 4px 14px rgba(242,101,34,0.3); }
.step-item h3 { font-size: 18px; font-weight: 700; color: #1a1a1a; margin-bottom: 8px; }
.step-item p { font-size: 14px; color: #777; line-height: 1.6; margin: 0; }
.solution-banner { border-radius: var(--radius-card); overflow: hidden; height: 320px; position: relative; background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat; }
.solution-banner::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 30%, rgba(0,0,0,0.75) 100%); }
.solution-banner-text { position: absolute; bottom: 28px; left: 32px; right: 32px; z-index: 2; color: #fff; display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.solution-banner-text h3 { font-size: 24px; font-weight: 800; margin-bottom: 6px; }
.solution-banner-text p { font-size: 14px; color: rgba(255,255,255,0.8); margin: 0; max-width: 600px; }

/* ===== 数据/成果 ===== */
.results { background: var(--color-bg-dark); }
.results-inner { display: flex; gap: 48px; align-items: center; }
.results-left { flex: 0 0 38%; }
.results-right { flex: 1; }
.data-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 32px; }
.data-card { background: var(--color-bg-panel); border: 1px solid var(--color-border-dark); border-radius: var(--radius-card); padding: 24px; text-align: center; transition: all .3s ease; }
.data-card:hover { border-color: rgba(242,101,34,0.3); transform: translateY(-2px); }
.data-card strong { display: block; font-family: var(--font-num); font-size: 48px; font-weight: 900; color: var(--color-accent); line-height: 1.1; margin-bottom: 6px; }
.data-card small { font-size: 13px; color: var(--color-text-dim); letter-spacing: 0.05em; }
.result-feature { display: flex; gap: 20px; background: var(--color-bg-panel); border: 1px solid var(--color-border-dark); border-radius: var(--radius-card); padding: 16px; align-items: center; transition: all .3s ease; }
.result-feature:hover { border-color: rgba(242,101,34,0.3); }
.result-feature img { width: 160px; height: 100px; object-fit: cover; border-radius: 10px; flex-shrink: 0; }
.result-feature-text h3 { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.result-feature-text p { font-size: 14px; color: var(--color-text-dim); margin: 0; }

/* ===== 证言 ===== */
.testimonials { background: var(--color-bg-light); color: #333; }
.testimonials .h2 { color: #1a1a1a; }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.t-card { background: #fff; border: 1px solid rgba(0,0,0,0.06); border-radius: var(--radius-card); padding: 28px; box-shadow: 0 2px 12px rgba(0,0,0,0.04); transition: all .3s ease; }
.t-card:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.08); }
.t-stars { display: flex; gap: 3px; margin-bottom: 14px; color: var(--color-gold); }
.t-stars svg { width: 18px; height: 18px; fill: currentColor; }
.t-card p { font-size: 15px; line-height: 1.7; color: #555; margin-bottom: 16px; }
.t-divider { height: 1px; background: rgba(0,0,0,0.06); margin: 16px 0; }
.t-user { display: flex; align-items: center; gap: 12px; }
.t-avatar { width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, var(--color-primary), var(--color-gold)); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 15px; flex-shrink: 0; }
.t-user-info strong { display: block; font-size: 14px; font-weight: 600; color: #333; }
.t-user-info small { font-size: 12px; color: #999; }

/* ===== CTA ===== */
.cta-section { background: var(--color-bg-dark); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat; opacity: 0.2; }
.cta-section::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 50px; background: linear-gradient(180deg, transparent, rgba(242,101,34,0.05)); }
.cta-inner { position: relative; z-index: 2; text-align: center; padding: 100px 20px; }
.cta-inner .h2 { font-size: 36px; font-weight: 900; margin-bottom: 16px; }
.cta-inner p { color: var(--color-text-dim); font-size: 16px; margin-bottom: 36px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== FAQ ===== */
.faq-section { background: var(--color-bg-light); color: #333; }
.faq-section .h2 { color: #1a1a1a; text-align: center; }
.faq-tag { display: inline-block; font-size: 13px; font-weight: 500; color: var(--color-primary); background: rgba(242,101,34,0.08); padding: 4px 16px; border-radius: var(--radius-pill); margin-bottom: 12px; }
.faq-wrap { max-width: 720px; margin: 40px auto 0; }
.faq-item { background: #fff; border: 1px solid rgba(0,0,0,0.06); border-radius: 14px; margin-bottom: 12px; overflow: hidden; transition: all .3s ease; }
.faq-item.active { box-shadow: 0 4px 16px rgba(0,0,0,0.06); border-color: rgba(242,101,34,0.2); }
.faq-question { width: 100%; display: flex; align-items: center; justify-content: space-between; padding: 18px 24px; background: transparent; border: none; font-size: 16px; font-weight: 600; color: #333; text-align: left; }
.faq-question .faq-icon { width: 24px; height: 24px; position: relative; flex-shrink: 0; }
.faq-question .faq-icon::before, .faq-question .faq-icon::after { content: ''; position: absolute; background: var(--color-primary); border-radius: 2px; transition: all .3s ease; }
.faq-question .faq-icon::before { top: 11px; left: 4px; width: 16px; height: 2px; }
.faq-question .faq-icon::after { top: 4px; left: 11px; width: 2px; height: 16px; }
.faq-item.active .faq-icon::after { transform: scaleY(0); }
.faq-item.active .faq-question { color: var(--color-primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.faq-answer p { padding: 0 24px 20px; font-size: 14px; color: #777; line-height: 1.7; margin: 0; }

/* ===== 页脚 ===== */
.site-footer { background: #101216; border-top: 1px solid var(--color-border-dark); padding: 60px 0 24px; }
.footer-top { display: flex; gap: 48px; margin-bottom: 40px; flex-wrap: wrap; }
.footer-brand { flex: 0 0 30%; }
.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p { font-size: 13px; color: var(--color-text-dim); line-height: 1.7; margin: 0; }
.footer-col { flex: 1; min-width: 140px; }
.footer-col h4 { font-size: 14px; font-weight: 600; color: var(--color-text-light); margin-bottom: 16px; letter-spacing: 0.03em; }
.footer-col ul { list-style: none; }
.footer-col li a { display: block; font-size: 13px; color: var(--color-text-dim); padding: 5px 0; transition: color .25s; }
.footer-col li a:hover { color: var(--color-primary); }
.footer-bottom { border-top: 1px solid var(--color-border-dark); padding-top: 24px; text-align: center; }
.footer-bottom p { font-size: 13px; color: var(--color-text-dim); margin: 0 0 4px; }
.footer-bottom .demo-tip { font-size: 12px; color: rgba(255,255,255,0.3); }

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .hero-inner { flex-direction: column; gap: 48px; }
  .hero-left { padding-right: 0; }
  .hero-right { width: 100%; }
  .hero-board { max-width: 100%; }
  .pain-inner { flex-direction: column; }
  .pain-left { position: static; flex: 1; }
  .results-inner { flex-direction: column; }
  .results-left { flex: 1; }
  .steps-row { grid-template-columns: 1fr 1fr; gap: 32px; }
  .step-item::after { display: none; }
  .testimonials-grid { grid-template-columns: 1fr 1fr; }
  .t-card:last-child { grid-column: span 2; }
  .hero-mini-cards { grid-template-columns: 1fr; }
}
@media (max-width: 639px) {
  :root { --space-section: var(--space-section-mobile); }
  .container { padding: 0 20px; }
  .site-header { left: 16px; right: 16px; top: 12px; padding: 0 16px; }
  .site-header.scrolled { left: 16px; right: 16px; }
  .nav-toggle { display: flex; }
  .nav-menu { display: none; position: absolute; top: 72px; left: 16px; right: 16px; background: var(--color-bg-panel); border: 1px solid var(--color-border-dark); border-radius: 16px; padding: 8px; flex-direction: column; align-items: stretch; box-shadow: var(--shadow-float); }
  .nav-menu.open { display: flex; }
  .nav-menu li a { padding: 14px 16px; border-radius: 10px; }
  .nav-menu li a::after { display: none; }
  .nav-cta { display: none; }
  .hero { padding-top: 100px; }
  .hero h1 { font-size: 40px; }
  .hero-points { gap: 12px; }
  .pain-right { grid-template-columns: 1fr; }
  .steps-row { grid-template-columns: 1fr; }
  .solution-banner { height: 260px; }
  .data-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .t-card:last-child { grid-column: span 1; }
  .footer-top { flex-direction: column; gap: 32px; }
  .footer-brand { flex: 1; }
  .footer-col { flex: 0 0 48%; }
  .result-feature { flex-direction: column; }
  .result-feature img { width: 100%; height: 160px; }
  .cta-inner { padding: 64px 20px; }
  .cta-inner .h2 { font-size: 28px; }
}

/* roulang page: category1 */
:root {
  --color-primary: #f26522;
  --color-accent: #e63946;
  --color-gold: #f4a261;
  --color-bg-dark: #14161a;
  --color-bg-panel: #1d2026;
  --color-bg-light: #f7f3ec;
  --color-text-light: #f5efe6;
  --color-text-dim: #9a8f84;
  --color-border-dark: rgba(255,255,255,0.08);
  --color-border-light: rgba(0,0,0,0.08);
  --radius-card: 16px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
  --shadow-float: 0 12px 40px rgba(0,0,0,0.45);
  --space-section: 80px;
  --space-section-mobile: 48px;
  --font-sans: "PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num: "DIN Alternate","Bebas Neue","Arial Narrow",sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); background: var(--color-bg-dark); color: var(--color-text-light); line-height: 1.75; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; transition: all .25s ease; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
ul, ol { list-style: none; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 32px; }
.section-pad { padding: var(--space-section) 0; }
.text-center { text-align: center; }
.text-orange { color: var(--color-primary); }
::selection { background: var(--color-primary); color: #1a1a1a; }

/* ===== 导航 ===== */
.site-header {
  position: fixed; top: 16px; left: 32px; right: 32px; z-index: 1000;
  background: rgba(20,22,26,0.82); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-border-dark); border-radius: var(--radius-pill); height: 64px;
  display: flex; align-items: center; justify-content: space-between; padding: 0 24px;
  transition: all .3s ease;
}
.site-header.scrolled {
  top: 0; left: 32px; right: 32px; border-radius: 0 0 20px 20px;
  background: rgba(18,20,24,0.95); box-shadow: var(--shadow-float);
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 800; color: var(--color-text-light); letter-spacing: 0.02em; }
.logo-badge { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; }
.logo-badge svg { width: 100%; height: 100%; }
.nav-menu { display: flex; align-items: center; gap: 8px; list-style: none; margin: 0; }
.nav-menu li a { display: block; padding: 8px 16px; font-size: 13px; font-weight: 500; color: var(--color-text-dim); border-radius: var(--radius-pill); position: relative; transition: color .25s, background .25s; }
.nav-menu li a:hover { color: var(--color-text-light); background: rgba(255,255,255,0.04); }
.nav-menu li a::after { content: ''; position: absolute; left: 16px; right: 16px; bottom: 2px; height: 2px; background: var(--color-primary); border-radius: 2px; opacity: 0; transform: scaleX(0.3); transition: all .3s ease; }
.nav-menu li a:hover::after, .nav-menu li a.active::after { opacity: 1; transform: scaleX(1); }
.nav-menu li a.active { color: var(--color-primary); }
.nav-cta { padding: 10px 24px; background: var(--color-primary); color: #1a1a1a !important; font-weight: 600; border-radius: var(--radius-pill); font-size: 13px; transition: all .25s ease; }
.nav-cta:hover { filter: brightness(1.05); transform: translateY(-1px); }
.nav-cta::after { display: none; }
.nav-toggle { display: none; width: 40px; height: 40px; background: transparent; border: 1px solid var(--color-border-dark); border-radius: 12px; align-items: center; justify-content: center; flex-direction: column; gap: 4px; }
.nav-toggle span { width: 18px; height: 2px; background: var(--color-text-light); border-radius: 2px; transition: all .3s ease; }
.nav-toggle.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ===== 按钮 ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 28px; border-radius: var(--radius-pill); font-size: 14px; font-weight: 600; border: none; transition: all .25s ease; letter-spacing: 0.02em; }
.btn-primary { background: var(--color-primary); color: #1a1a1a; }
.btn-primary:hover { filter: brightness(1.05); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(242,101,34,0.3); }
.btn-primary:active { transform: translateY(1px); box-shadow: 0 2px 8px rgba(242,101,34,0.2); }
.btn-ghost { background: transparent; border: 1px solid var(--color-border-dark); color: var(--color-text-light); }
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-1px); }
.btn-lg { min-height: 50px; padding: 0 36px; font-size: 15px; }
.btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; }

/* ===== 分类页头部 ===== */
.cat-hero {
  position: relative; background: var(--color-bg-dark);
  padding: 148px 0 56px; overflow: hidden;
}
.cat-hero::before {
  content: ''; position: absolute; top: 0; right: 0; bottom: 0; left: 0;
  background: radial-gradient(ellipse at 70% 20%, rgba(242,101,34,0.14), transparent 55%);
}
.cat-hero::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 44px;
  display: flex; gap: 0;
  background:
    linear-gradient(180deg, transparent, rgba(242,101,34,0.08)),
    repeating-linear-gradient(90deg, transparent 0 32px, rgba(242,101,34,0.14) 32px 36px, transparent 36px 44px, transparent 44px 60px, rgba(242,101,34,0.1) 60px 64px, transparent 64px 76px);
  opacity: 0.6;
  pointer-events: none;
}
.cat-hero-inner { position: relative; z-index: 2; }
.cat-breadcrumb { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--color-text-dim); margin-bottom: 20px; letter-spacing: 0.04em; }
.cat-breadcrumb a:hover { color: var(--color-primary); }
.cat-breadcrumb .sep { color: rgba(255,255,255,0.25); }
.cat-breadcrumb .current { color: var(--color-primary); font-weight: 500; }
.cat-hero h1 { font-size: 44px; font-weight: 900; line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 16px; }
.cat-hero h1 span { color: var(--color-primary); }
.cat-hero-desc { font-size: 15px; color: var(--color-text-dim); max-width: 780px; line-height: 1.8; margin-bottom: 32px; }
.cat-quick-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.quick-tag {
  display: inline-flex; align-items: center; height: 38px; padding: 0 20px;
  border-radius: var(--radius-pill); font-size: 13px; font-weight: 500;
  background: var(--color-bg-panel); color: var(--color-text-dim);
  border: 1px solid var(--color-border-dark); transition: all .25s ease;
}
.quick-tag:hover { color: var(--color-text-light); border-color: var(--color-primary); }
.quick-tag.active { background: var(--color-primary); color: #1a1a1a; border-color: var(--color-primary); font-weight: 600; }

/* ===== 内容卡片 ===== */
.cat-content { padding: 64px 0 56px; background: var(--color-bg-dark); }
.cat-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; margin-bottom: 36px; flex-wrap: wrap;
}
.filter-group { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-btn {
  padding: 8px 18px; border-radius: var(--radius-pill);
  font-size: 13px; font-weight: 500;
  background: var(--color-bg-panel); color: var(--color-text-dim);
  border: 1px solid var(--color-border-dark); transition: all .25s ease;
}
.filter-btn:hover { border-color: var(--color-primary); color: var(--color-text-light); }
.filter-btn.active { background: var(--color-primary); color: #1a1a1a; border-color: var(--color-primary); font-weight: 600; }
.sort-wrap { position: relative; }
.sort-btn {
  display: inline-flex; align-items: center; gap: 8px;
  height: 40px; padding: 0 16px;
  background: var(--color-bg-panel);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-pill);
  color: var(--color-text-light); font-size: 13px; font-weight: 500;
  transition: all .25s ease;
}
.sort-btn:hover { border-color: var(--color-primary); }
.sort-btn .fi { font-size: 12px; margin-left: 4px; transition: transform .3s; }
.sort-wrap.open .sort-btn .fi { transform: rotate(180deg); }
.sort-menu {
  position: absolute; top: calc(100% + 8px); right: 0; min-width: 160px;
  background: var(--color-bg-panel); border: 1px solid var(--color-border-dark);
  border-radius: 12px; box-shadow: var(--shadow-card); padding: 6px;
  opacity: 0; visibility: hidden; transform: translateY(8px); transition: all .25s ease;
  z-index: 10; margin: 0;
}
.sort-wrap.open .sort-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.sort-menu li a {
  display: block; padding: 9px 14px; font-size: 13px; color: var(--color-text-dim);
  border-radius: 8px; transition: all .2s;
}
.sort-menu li a:hover, .sort-menu li a.active { color: var(--color-primary); background: rgba(242,101,34,0.08); }

.row.cat-grid { margin: 0 -12px; }
.row.cat-grid .columns { padding: 0 12px; margin-bottom: 24px; }

.content-card {
  position: relative; background: var(--color-bg-panel);
  border-radius: var(--radius-card); border: 1px solid var(--color-border-dark);
  box-shadow: var(--shadow-card); overflow: hidden; height: 100%;
  display: flex; flex-direction: column;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.content-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--color-primary), transparent);
  opacity: 0; transition: opacity .3s;
}
.content-card:hover { transform: translateY(-4px); border-color: rgba(242,101,34,0.7); box-shadow: var(--shadow-float); }
.content-card:hover::before { opacity: 1; }
.card-media { position: relative; aspect-ratio: 16/9; overflow: hidden; background: #0d0f12; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.content-card:hover .card-media img { transform: scale(1.04); }
.card-media::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 40%;
  background: linear-gradient(180deg, transparent, rgba(0,0,0,0.55));
  pointer-events: none;
}
.card-badge {
  position: absolute; top: 12px; right: 12px; z-index: 2;
  height: 24px; display: inline-flex; align-items: center; padding: 0 12px;
  border-radius: var(--radius-pill); font-size: 12px; font-weight: 600;
  background: var(--color-accent); color: #fff; letter-spacing: 0.03em;
}
.card-badge.gold { background: var(--color-gold); color: #1a1a1a; }
.card-badge.hot { background: var(--color-primary); color: #1a1a1a; }
.card-body { padding: 20px 20px 18px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 { font-size: 18px; font-weight: 700; line-height: 1.45; margin-bottom: 8px; color: var(--color-text-light); }
.card-body p { font-size: 14px; color: var(--color-text-dim); line-height: 1.65; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 16px; }
.card-meta { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 14px; border-top: 1px solid var(--color-border-dark); }
.card-meta .tag {
  display: inline-flex; align-items: center; height: 26px; padding: 0 12px;
  border-radius: var(--radius-pill); font-size: 12px; font-weight: 500;
  background: rgba(242,101,34,0.12); color: var(--color-primary);
}
.card-meta .duration { font-size: 13px; font-weight: 500; color: var(--color-text-dim); }

/* ===== 专题横向条 ===== */
.topic-section { position: relative; padding: 24px 0 64px; }
.topic-banner {
  position: relative; border-radius: var(--radius-card); overflow: hidden;
  background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
  min-height: 180px; display: flex; align-items: center; justify-content: space-between;
  padding: 36px 48px; gap: 24px; box-shadow: var(--shadow-card);
}
.topic-banner::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(20,22,26,0.94) 25%, rgba(20,22,26,0.65));
}
.topic-banner::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 24px;
  background: repeating-linear-gradient(90deg, transparent 0 28px, rgba(242,101,34,0.18) 28px 32px, transparent 32px 40px, transparent 40px 58px, rgba(242,101,34,0.12) 58px 62px, transparent 62px 72px);
  opacity: 0.5; pointer-events: none;
}
.topic-content { position: relative; z-index: 1; }
.topic-content h3 { font-size: 22px; font-weight: 800; color: var(--color-text-light); margin-bottom: 8px; line-height: 1.4; }
.topic-content p { font-size: 14px; color: var(--color-text-dim); line-height: 1.7; margin-bottom: 0; max-width: 520px; }
.topic-banner .btn { position: relative; z-index: 1; flex-shrink: 0; }

/* ===== 分页 ===== */
.cat-pagination { display: flex; justify-content: center; gap: 8px; padding: 24px 0 64px; }
.page-btn {
  width: 44px; height: 44px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-pill); background: var(--color-bg-panel);
  border: 1px solid var(--color-border-dark); color: var(--color-text-dim);
  font-size: 14px; font-weight: 500; transition: all .25s ease;
}
.page-btn:hover { border-color: var(--color-primary); color: var(--color-text-light); transform: translateY(-1px); }
.page-btn.active { background: var(--color-primary); color: #1a1a1a; border-color: var(--color-primary); font-weight: 700; box-shadow: 0 4px 16px rgba(242,101,34,0.3); }
.page-btn .fi { font-size: 14px; }

/* ===== 底部 CTA ===== */
.cat-cta {
  position: relative; background: var(--color-bg-dark);
  padding: 72px 0 80px; text-align: center; overflow: hidden;
  border-top: 1px solid var(--color-border-dark);
}
.cat-cta::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at center, rgba(242,101,34,0.1), transparent 65%);
}
.cat-cta::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 28px;
  background: repeating-linear-gradient(90deg, transparent 0 24px, rgba(242,101,34,0.14) 24px 28px, transparent 28px 40px, transparent 40px 56px, rgba(242,101,34,0.1) 56px 60px, transparent 60px 72px);
  opacity: 0.5; pointer-events: none;
}
.cat-cta-inner { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
.cat-cta h2 { font-size: 32px; font-weight: 800; line-height: 1.3; margin-bottom: 12px; }
.cat-cta p { font-size: 15px; color: var(--color-text-dim); margin-bottom: 28px; }

/* ===== 页脚 ===== */
.site-footer {
  background: #101216; border-top: 1px solid var(--color-border-dark);
  padding: 56px 0 32px;
}
.footer-top { display: flex; flex-wrap: wrap; gap: 40px; margin-bottom: 40px; }
.footer-brand { flex: 0 0 320px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--color-text-dim); line-height: 1.7; max-width: 280px; }
.footer-col { flex: 1; min-width: 140px; }
.footer-col h4 { font-size: 14px; font-weight: 700; color: var(--color-text-light); margin-bottom: 16px; letter-spacing: 0.02em; }
.footer-col ul { list-style: none; margin: 0; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 13px; color: var(--color-text-dim); transition: all .25s; }
.footer-col ul li a:hover { color: var(--color-primary); padding-left: 4px; }
.footer-bottom { border-top: 1px solid var(--color-border-dark); padding-top: 24px; text-align: center; }
.footer-bottom p { font-size: 13px; color: var(--color-text-dim); margin-bottom: 4px; }
.footer-bottom .demo-tip { font-size: 12px; opacity: 0.7; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .nav-menu { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-menu.open {
    display: flex; flex-direction: column; align-items: stretch; gap: 4px;
    position: absolute; top: calc(100% + 12px); left: 0; right: 0;
    background: rgba(18,20,24,0.97); border: 1px solid var(--color-border-dark);
    border-radius: 16px; padding: 12px; box-shadow: var(--shadow-float);
    backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  }
  .nav-menu.open li a { padding: 10px 14px; }
  .nav-menu.open li a::after { display: none; }
  .nav-cta { display: none; }
  .footer-brand { flex-basis: 100%; }
}

@media (max-width: 640px) {
  :root { --space-section: 48px; }
  .container { padding: 0 20px; }
  .site-header { top: 12px; left: 16px; right: 16px; padding: 0 16px; }
  .site-header.scrolled { left: 16px; right: 16px; }
  .cat-hero { padding: 116px 0 40px; }
  .cat-hero h1 { font-size: 32px; }
  .cat-hero-desc { font-size: 14px; margin-bottom: 24px; }
  .cat-content { padding: 40px 0 32px; }
  .cat-toolbar { flex-direction: column; align-items: stretch; }
  .filter-group { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; }
  .filter-btn { flex-shrink: 0; }
  .sort-wrap { align-self: flex-end; }
  .topic-banner { flex-direction: column; align-items: flex-start; padding: 28px 24px; gap: 16px; }
  .topic-banner .btn { width: 100%; }
  .cat-pagination { gap: 6px; }
  .page-btn { width: 40px; height: 40px; font-size: 13px; }
  .cat-cta { padding: 48px 0 56px; }
  .cat-cta h2 { font-size: 26px; }
  .footer-top { flex-direction: column; gap: 32px; }
  .footer-brand { flex-basis: auto; }
  .footer-col { flex: 0 0 calc(50% - 20px); min-width: 0; }
  .footer-col h4 { margin-bottom: 12px; }
}

/* 分类页补强细化 */
@media (max-width: 640px) {
  .row.cat-grid .columns { padding: 0 8px; margin-bottom: 16px; }
  .row.cat-grid { margin: 0 -8px; }
  .card-body { padding: 16px 16px 14px; }
  .card-body h3 { font-size: 16px; }
  .card-body p { font-size: 13px; }
}