/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --color-dark: #16161F;
  --color-accent: #E8930C;
  --color-accent-hover: #C87A08;
  --color-bg: #F7F4EF;
  --color-card: #FFFFFF;
  --color-text-main: #1F1F2A;
  --color-text-sub: #5A5A6E;
  --color-text-weak: #8A8A9E;
  --color-text-light: #FFFFFF;
  --color-text-light-sub: #B8B8CC;
  --color-border: rgba(22,22,31,0.08);
  --color-border-light: rgba(255,255,255,0.1);
  --color-positive: #2FBF71;
  --color-negative: #E85D5D;
  --radius-card: 12px;
  --radius-large: 16px;
  --radius-btn: 8px;
  --radius-badge: 999px;
  --shadow-default: 0 4px 20px rgba(22,22,31,0.06);
  --shadow-hover: 0 8px 32px rgba(22,22,31,0.12);
  --shadow-dark: 0 8px 32px rgba(22,22,31,0.32);
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "Roboto Mono", "DIN Alternate", monospace;
  --space-section: 96px;
  --space-section-mobile: 64px;
  --transition: 0.25s ease-out;
}

/* ===== Reset 与基础 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.75;
  background: var(--color-bg);
  color: var(--color-text-main);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-hover); }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }

/* ===== 容器 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* ===== 排版 ===== */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text-main);
}

h1 { font-size: 44px; }
h2 { font-size: 32px; }
h3 { font-size: 20px; font-weight: 600; }

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-header h2 { margin-bottom: 16px; }
.section-header p { color: var(--color-text-sub); font-size: 16px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-btn);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1.2;
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: transparent;
  color: var(--color-text-main);
  border-color: rgba(22,22,31,0.35);
}
.btn-secondary:hover {
  background: rgba(22,22,31,0.05);
  border-color: var(--color-text-main);
  transform: translateY(-2px);
}
.btn-secondary:active { transform: translateY(0); }

.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}
.btn-outline-light:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}
.btn-outline-light:active { transform: translateY(0); }

.btn-block { width: 100%; }

/* ===== 徽章 / 标签 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--radius-badge);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.6;
  background: var(--color-card);
  color: var(--color-text-sub);
  border: 1px solid var(--color-border);
}

.badge-dark {
  background: rgba(22,22,31,0.55);
  color: #fff;
  border-color: rgba(255,255,255,0.2);
  backdrop-filter: blur(4px);
}

.badge-accent {
  background: var(--color-accent);
  color: #fff;
  border-color: transparent;
}

.badge-hot {
  background: rgba(232,147,12,0.15);
  color: var(--color-accent-hover);
  border-color: transparent;
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  background: rgba(22,22,31,0.92);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
}

.site-header.scrolled .header-inner {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 10px;
  transition: all var(--transition);
}

.site-header.scrolled .brand-row {
  padding: 0;
  width: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0;
}
.brand:hover { color: #fff; }

.brand-icon {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.brand-cat {
  width: 32px;
  height: 32px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-actions .btn {
  padding: 8px 18px;
  font-size: 13px;
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}
.header-actions .btn:hover {
  background: rgba(255,255,255,0.1);
}

.channel-row nav ul {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.channel-row nav ul li a {
  display: inline-block;
  color: rgba(255,255,255,0.85);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 2px;
  position: relative;
  transition: color var(--transition);
  border-bottom: 2px solid transparent;
}
.channel-row nav ul li a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--color-accent);
  transition: width var(--transition);
}
.channel-row nav ul li a:hover,
.channel-row nav ul li a.active {
  color: #fff;
}
.channel-row nav ul li a:hover::after,
.channel-row nav ul li a.active::after {
  width: 100%;
}

.site-header.scrolled .channel-row {
  width: auto;
}

.site-header.scrolled .channel-row nav ul {
  gap: 24px;
}

.site-header.scrolled .header-actions {
  display: none;
}

.hamburger {
  display: none;
  background: transparent;
  border: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  z-index: 1002;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  transition: all var(--transition);
  border-radius: 2px;
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端抽屉 */
.mobile-drawer {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-dark);
  z-index: 1001;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}
.mobile-drawer.open { opacity: 1; visibility: visible; }

.mobile-drawer nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}
.mobile-drawer nav a {
  color: #fff;
  font-size: 24px;
  font-weight: 600;
  opacity: 0;
  transform: translateY(16px);
  transition: all var(--transition);
}
.mobile-drawer.open nav a { opacity: 1; transform: translateY(0); }
.mobile-drawer.open nav a:nth-child(1) { transition-delay: 0.1s; }
.mobile-drawer.open nav a:nth-child(2) { transition-delay: 0.2s; }
.mobile-drawer.open nav a:nth-child(3) { transition-delay: 0.3s; }
.mobile-drawer.open nav a:nth-child(4) { transition-delay: 0.4s; }
.mobile-drawer.open nav a:nth-child(5) { transition-delay: 0.5s; }

body.no-scroll { overflow: hidden; }

/* ===== Hero ===== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  color: #fff;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(22,22,31,0.65);
}

.hero-inner {
  position: relative;
  z-index: 2;
  padding-top: 120px;
  padding-bottom: 80px;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-badge);
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  font-size: 13px;
  letter-spacing: 0;
  color: rgba(255,255,255,0.9);
  margin-bottom: 24px;
}

.hero-badge-icon {
  color: var(--color-accent);
  display: flex;
}

.hero-title {
  font-size: 44px;
  line-height: 1.25;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255,255,255,0.75);
  max-width: 480px;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.hero-trust {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255,255,255,0.6);
}

.hero-trust span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.hero-trust span::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

/* 右侧数据看板卡 */
.dashboard-card {
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: var(--radius-large);
  padding: 28px;
  box-shadow: var(--shadow-dark);
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  font-size: 13px;
  color: rgba(255,255,255,0.8);
}
.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-positive);
  display: inline-block;
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.dashboard-item {
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-card);
  padding: 16px 12px;
  text-align: center;
}
.dashboard-item strong {
  display: block;
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  font-family: var(--font-mono);
  line-height: 1.2;
}
.dashboard-item span {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
}

.dashboard-progress {
  display: flex;
  align-items: center;
  gap: 20px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-card);
  padding: 16px;
}

.dashboard-progress svg { flex-shrink: 0; }

.dashboard-progress strong {
  display: block;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  font-family: var(--font-mono);
}
.dashboard-progress span {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
}

/* ===== 指标带 ===== */
.metrics-section {
  position: relative;
  z-index: 5;
  margin-top: -80px;
  padding-bottom: 40px;
}

.metric-card {
  background: var(--color-card);
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: var(--shadow-default);
  transition: transform var(--transition), box-shadow var(--transition);
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}
.metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.metric-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.metric-card:hover::before { transform: scaleX(1); }

.metric-number {
  font-size: 64px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text-main);
  line-height: 1.1;
  font-family: var(--font-mono);
}
.metric-number span {
  font-size: 28px;
  color: var(--color-accent);
  margin-left: 2px;
}

.metric-label {
  font-size: 14px;
  color: var(--color-text-sub);
  margin-top: 8px;
  margin-bottom: 16px;
}

.metric-chart {
  height: 24px;
  display: flex;
  align-items: flex-end;
  gap: 3px;
}
.metric-chart i {
  display: block;
  width: 6px;
  border-radius: 2px;
  background: rgba(232,147,12,0.15);
}
.metric-chart i.fill { background: var(--color-accent); }

.metric-chart.chart-bars i:nth-child(1) { height: 30%; }
.metric-chart.chart-bars i:nth-child(2) { height: 55%; }
.metric-chart.chart-bars i:nth-child(3) { height: 40%; }
.metric-chart.chart-bars i:nth-child(4) { height: 75%; }
.metric-chart.chart-bars i:nth-child(5) { height: 60%; }
.metric-chart.chart-bars i:nth-child(6) { height: 90%; }
.metric-chart.chart-bars i:nth-child(7) { height: 70%; }
.metric-chart.chart-bars i:nth-child(8) { height: 50%; }

.metric-chart.chart-line { align-items: center; }
.metric-chart.chart-line i { height: 3px; border-radius: 2px; background: var(--color-accent); }
.metric-chart.chart-line i:nth-child(1) { height: 8px; }
.metric-chart.chart-line i:nth-child(2) { height: 14px; }
.metric-chart.chart-line i:nth-child(3) { height: 10px; }
.metric-chart.chart-line i:nth-child(4) { height: 20px; }
.metric-chart.chart-line i:nth-child(5) { height: 16px; }
.metric-chart.chart-line i:nth-child(6) { height: 24px; }
.metric-chart.chart-line i:nth-child(7) { height: 18px; }
.metric-chart.chart-line i:nth-child(8) { height: 26px; }

/* ===== 服务矩阵 ===== */
.services-section {
  padding: var(--space-section) 0;
}

.service-col { margin-bottom: 24px; }

.service-card {
  background: var(--color-card);
  border-radius: var(--radius-card);
  padding: 24px;
  height: 100%;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-default);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.service-card:hover::before { transform: scaleX(1); }

.service-icon {
  width: 40px;
  height: 40px;
  color: var(--color-accent);
  margin-bottom: 16px;
}
.service-icon svg { width: 40px; height: 40px; }

.service-card h3 { margin-bottom: 8px; }

.service-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-sub);
  margin-bottom: 16px;
  flex-grow: 1;
}

.service-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-accent-hover);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition), color var(--transition);
}
.service-link:hover { gap: 10px; color: var(--color-accent-hover); }

/* ===== 热门榜单 ===== */
.hot-section {
  padding: var(--space-section) 0;
  background: var(--color-card);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.hot-card {
  margin-bottom: 24px;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-default);
  transition: transform var(--transition), box-shadow var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.hot-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.hot-cover {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.hot-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease-out;
}
.hot-card:hover .hot-cover img { transform: scale(1.04); }

.hot-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(22,22,31,0.3));
}

.hot-cover .badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
}

.hot-cover .duration {
  position: absolute;
  right: 12px;
  bottom: 12px;
  z-index: 2;
  background: rgba(22,22,31,0.7);
  color: #fff;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: var(--radius-badge);
}

.hot-body {
  padding: 20px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.hot-body h3 { margin-bottom: 8px; }
.hot-body p { font-size: 14px; color: var(--color-text-sub); line-height: 1.7; margin-bottom: 12px; flex-grow: 1; }

.hot-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--color-text-weak);
}

/* ===== 结果对比 ===== */
.compare-section {
  padding: var(--space-section) 0;
}

.compare-block {
  background: var(--color-card);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-default);
  padding: 32px;
  max-width: 960px;
  margin: 0 auto;
}

.compare-header,
.compare-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.compare-header .compare-col {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
}

.compare-col {
  padding: 18px 20px;
  font-size: 14px;
  line-height: 1.7;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.col-old {
  background: rgba(0,0,0,0.03);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-sub);
}

.col-new {
  background: #fff;
  border-left: 4px solid var(--color-accent);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-main);
}

.compare-header .col-old { background: rgba(0,0,0,0.03); border-bottom: 1px solid var(--color-border); }
.compare-header .col-new { background: #fff; border-left: 4px solid var(--color-accent); border-bottom: 1px solid var(--color-border); }

.compare-header {
  border-bottom: none;
}

.icon-check, .icon-minus {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
  line-height: 1;
  padding: 0;
  margin-top: 3px;
}
.icon-check { background: rgba(47,191,113,0.12); color: var(--color-positive); }
.icon-minus { background: rgba(232,93,93,0.1); color: var(--color-negative); }

.compare-cta {
  text-align: center;
  margin-top: 32px;
}

/* ===== 资讯指南 ===== */
.insight-section {
  padding: var(--space-section) 0;
  background: var(--color-card);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.insight-list {
  display: flex;
  flex-direction: column;
}

.insight-item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
  transition: padding-left var(--transition);
}
.insight-item:hover { padding-left: 8px; }

.insight-item a {
  color: var(--color-text-main);
  font-size: 15px;
  font-weight: 500;
  flex-grow: 1;
  line-height: 1.6;
  transition: color var(--transition);
}
.insight-item a:hover { color: var(--color-accent-hover); }

.insight-date {
  font-size: 12px;
  color: var(--color-text-weak);
  white-space: nowrap;
}

.trend-panel {
  background: var(--color-bg);
  border-radius: var(--radius-card);
  padding: 24px;
  margin-bottom: 20px;
}
.trend-panel h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.trend-list {
  list-style: none;
}
.trend-list li {
  margin-bottom: 12px;
}
.trend-list li a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  color: var(--color-text-main);
  font-size: 14px;
  transition: color var(--transition);
}
.trend-list li a:hover { color: var(--color-accent-hover); }
.trend-list li a span {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 700;
}

.trend-cta {
  background: transparent;
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-card);
  padding: 20px;
  text-align: center;
}
.trend-cta p { font-size: 14px; color: var(--color-text-sub); margin-bottom: 12px; }
.trend-cta .btn { padding: 10px 20px; }

/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-section) 0;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  background: transparent;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-main);
  transition: color var(--transition);
}
.faq-question:hover { color: var(--color-accent-hover); }
.faq-item.active .faq-question { color: var(--color-accent-hover); }

.faq-toggle {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--color-text-weak);
  position: relative;
  flex-shrink: 0;
  transition: all var(--transition);
}
.faq-toggle::before,
.faq-toggle::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-text-weak);
  transition: all var(--transition);
}
.faq-toggle::before {
  width: 10px;
  height: 2px;
}
.faq-toggle::after {
  width: 2px;
  height: 10px;
}
.faq-item.active .faq-toggle::after { transform: translate(-50%, -50%) scaleY(0); }
.faq-item.active .faq-toggle { border-color: var(--color-accent); transform: rotate(180deg); }
.faq-item.active .faq-toggle::before,
.faq-item.active .faq-toggle::after { background: var(--color-accent); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
}
.faq-answer p {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.8;
  padding: 0 0 24px;
}

/* ===== 转化表单 ===== */
.contact-section {
  position: relative;
  padding: var(--space-section) 0;
  background: var(--color-dark);
  color: #fff;
  overflow: hidden;
}

.contact-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.3;
}

.contact-overlay {
  position: absolute;
  inset: 0;
  background: var(--color-dark);
  opacity: 0.85;
}

.contact-inner {
  position: relative;
  z-index: 2;
}

.contact-info h2 {
  color: #fff;
  margin-bottom: 16px;
}

.contact-info p {
  color: rgba(255,255,255,0.7);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.contact-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 24px;
}
.contact-meta p {
  margin: 0;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.85);
}
.contact-meta i { width: 18px; color: var(--color-accent); display: flex; }

.form-card {
  background: var(--color-card);
  border-radius: var(--radius-large);
  padding: 24px;
  box-shadow: var(--shadow-hover);
  color: var(--color-text-main);
}

.form-card form label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-main);
  margin-bottom: 6px;
  margin-top: 16px;
}
.form-card form label:first-of-type { margin-top: 0; }

.form-card input,
.form-card select,
.form-card textarea {
  width: 100%;
  border: 1px solid rgba(22,22,31,0.15);
  border-radius: var(--radius-btn);
  padding: 10px 14px;
  font-size: 14px;
  line-height: 1.5;
  background: #fff;
  color: var(--color-text-main);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

.form-card select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%235A5A6E' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  cursor: pointer;
}

.form-card textarea { resize: vertical; min-height: 100px; }

.form-card input:focus,
.form-card select:focus,
.form-card textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(232,147,12,0.25);
}

.form-card ::placeholder { color: var(--color-text-weak); font-size: 13px; }

.form-card .btn { margin-top: 20px; }

.form-safe {
  text-align: center;
  font-size: 12px;
  color: var(--color-text-weak);
  margin-top: 14px;
}

.form-success {
  text-align: center;
  padding: 40px 20px;
}
.success-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(47,191,113,0.12);
  color: var(--color-positive);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin: 0 auto 16px;
}
.form-success h3 { margin-bottom: 8px; }
.form-success p { color: var(--color-text-sub); font-size: 14px; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-dark);
  color: #fff;
  padding-top: 64px;
  font-size: 14px;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
}

.footer-tagline {
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  margin-left: 10px;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}
.footer-social a {
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  transition: all var(--transition);
}
.footer-social a:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  transform: translateY(-2px);
}
.footer-social svg { width: 16px; height: 16px; }

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 40px 0;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  color: var(--color-text-light-sub);
  font-size: 13px;
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}

/* ===== 动效 ===== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式断点 ===== */
@media (max-width: 1024px) {
  h1 { font-size: 36px; }
  .hero-title { font-size: 36px; }
  .metric-number { font-size: 48px; }
  .metric-number span { font-size: 22px; }
  .footer-links { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  h1 { font-size: 30px; }
  h2 { font-size: 24px; }
  body { font-size: 15px; }

  .header-inner { padding: 0 16px; flex-direction: row; align-items: center; justify-content: space-between; height: 64px; }
  .brand-row { padding: 0; width: auto; }
  .channel-row { display: none; }
  .header-actions { display: none; }
  .hamburger { display: flex; }

  .site-header.scrolled .brand-row { padding: 0; }

  .hero-section { min-height: auto; }
  .hero-inner { padding-top: 120px; padding-bottom: 60px; }
  .hero-title { font-size: 30px; }
  .hero-subtitle { font-size: 15px; }
  .hero-buttons { flex-direction: column; align-items: stretch; }
  .hero-buttons .btn { width: 100%; }
  .metrics-section { margin-top: -56px; }
  .metric-number { font-size: 40px; }

  .services-section,
  .compare-section,
  .faq-section { padding: var(--space-section-mobile) 0; }

  .hot-section,
  .insight-section { padding: var(--space-section-mobile) 0; }

  .compare-block { padding: 20px; }
  .compare-header .compare-col,
  .compare-row .compare-col { padding: 14px; font-size: 13px; }

  .contact-section { padding: var(--space-section-mobile) 0; }
  .contact-info { margin-bottom: 32px; }

  .footer-top { flex-direction: column; align-items: flex-start; }
  .footer-links { grid-template-columns: 1fr 1fr; gap: 20px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  h1 { font-size: 26px; }
  h2 { font-size: 22px; }

  .hero-title { font-size: 26px; }
  .hero-subtitle { font-size: 14px; }

  .dashboard-grid { grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
  .dashboard-item { padding: 12px 6px; }
  .dashboard-item strong { font-size: 18px; }
  .dashboard-progress { flex-direction: column; gap: 12px; }

  .metric-card { padding: 16px; }
  .metric-number { font-size: 36px; }
  .metric-number span { font-size: 18px; }

  .compare-header,
  .compare-row { grid-template-columns: 1fr; }
  .col-new { border-left: none; border-top: 3px solid var(--color-accent); }
  .compare-header .col-new { border-left: none; }

  .insight-item { flex-direction: column; gap: 4px; }
  .insight-date { font-size: 11px; }

  .footer-links { grid-template-columns: 1fr 1fr; }
  .form-card { padding: 20px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --color-dark: #16161F;
  --color-accent: #E8930C;
  --color-accent-hover: #C87A08;
  --color-bg: #F7F4EF;
  --color-card: #FFFFFF;
  --color-text-main: #1F1F2A;
  --color-text-sub: #5A5A6E;
  --color-text-weak: #8A8A9E;
  --color-text-light: #FFFFFF;
  --color-text-light-sub: #B8B8CC;
  --color-border: rgba(22,22,31,0.08);
  --color-border-light: rgba(255,255,255,0.1);
  --color-positive: #2FBF71;
  --color-negative: #E85D5D;
  --radius-card: 12px;
  --radius-large: 16px;
  --radius-btn: 8px;
  --radius-badge: 999px;
  --shadow-default: 0 4px 20px rgba(22,22,31,0.06);
  --shadow-hover: 0 8px 32px rgba(22,22,31,0.12);
  --shadow-dark: 0 8px 32px rgba(22,22,31,0.32);
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "Roboto Mono", "DIN Alternate", monospace;
  --space-section: 96px;
  --space-section-mobile: 64px;
  --transition: 0.25s ease-out;
}

/* ===== 基础 Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; padding: 0; }
body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.75;
  background: var(--color-bg);
  color: var(--color-text-main);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-hover); }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6 { margin: 0 0 16px; font-weight: 700; line-height: 1.3; color: var(--color-text-main); }
p { margin: 0 0 16px; }
button, input, select, textarea { font-family: inherit; font-size: inherit; line-height: 1.5; }
button { cursor: pointer; border: none; background: none; }

/* ===== 容器 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}
.section-pad { padding: var(--space-section) 0; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-btn);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1.2;
  text-align: center;
  white-space: nowrap;
}
.btn-primary { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: transparent;
  color: var(--color-text-main);
  border-color: rgba(22,22,31,0.35);
}
.btn-secondary:hover { background: rgba(22,22,31,0.05); border-color: var(--color-text-main); transform: translateY(-2px); }
.btn-outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,0.6); }
.btn-outline-light:hover { background: rgba(255,255,255,0.1); border-color: #fff; color: #fff; transform: translateY(-2px); }
.btn-block { width: 100%; }

/* ===== 徽章 / 标签 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--radius-badge);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.6;
  background: var(--color-card);
  color: var(--color-text-sub);
  border: 1px solid var(--color-border);
}
.badge-dark { background: rgba(22,22,31,0.55); color: #fff; border-color: rgba(255,255,255,0.2); backdrop-filter: blur(4px); }
.badge-accent { background: var(--color-accent); color: #fff; border-color: transparent; }
.badge-hot { background: rgba(232,147,12,0.15); color: var(--color-accent-hover); border-color: transparent; }
.badge-cat { background: #F0EDE8; color: var(--color-text-sub); border-color: transparent; }

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(22,22,31,0.88);
  backdrop-filter: blur(8px);
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header.scrolled {
  background: rgba(22,22,31,0.94);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
}
.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 8px;
  transition: all var(--transition);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0;
}
.brand:hover { color: #fff; }
.brand-icon { width: 34px; height: 34px; display: flex; align-items: center; justify-content: center; color: var(--color-accent); }
.brand-cat { width: 32px; height: 32px; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.header-actions .btn { padding: 8px 18px; font-size: 13px; background: transparent; color: #fff; border-color: rgba(255,255,255,0.5); }
.header-actions .btn:hover { background: rgba(255,255,255,0.1); }
.channel-row nav ul { display: flex; align-items: center; gap: 32px; padding: 0; margin: 0; list-style: none; }
.channel-row nav ul li a {
  display: inline-block;
  color: rgba(255,255,255,0.85);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 2px 10px;
  position: relative;
  transition: color var(--transition);
  border-bottom: 2px solid transparent;
}
.channel-row nav ul li a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--color-accent);
  transition: width var(--transition);
}
.channel-row nav ul li a:hover, .channel-row nav ul li a.active { color: #fff; }
.channel-row nav ul li a:hover::after, .channel-row nav ul li a.active::after { width: 100%; }

/* 导航收起为单行 */
.site-header.scrolled .header-inner { flex-direction: row; align-items: center; justify-content: space-between; height: 64px; }
.site-header.scrolled .brand-row { padding: 0; width: auto; }
.site-header.scrolled .channel-row { width: auto; }

/* 移动端汉堡 */
.header-burger { display: none; }
.mobile-menu { display: none; }

/* ===== 页头横幅（分类页小Hero） ===== */
.page-banner {
  padding: 140px 0 56px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.banner-inner {
  display: flex;
  align-items: center;
  gap: 48px;
}
.banner-content { flex: 0 0 58%; }
.banner-visual { flex: 1; }
.banner-visual .cover-img {
  aspect-ratio: 16/10;
  border-radius: var(--radius-large);
  object-fit: cover;
  box-shadow: var(--shadow-hover);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-weak);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--color-text-sub); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .sep { color: var(--color-text-weak); }
.banner-content h1 {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
}
.banner-content h1 .highlight { color: var(--color-accent); }
.banner-desc {
  font-size: 16px;
  color: var(--color-text-sub);
  line-height: 1.8;
  max-width: 560px;
  margin-bottom: 24px;
}
.banner-meta { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.banner-meta .stat-item { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--color-text-sub); }
.banner-meta .stat-num { font-family: var(--font-mono); font-size: 18px; font-weight: 700; color: var(--color-text-main); }

/* ===== 筛选标签栏 ===== */
.filter-bar {
  position: sticky;
  top: 64px;
  z-index: 500;
  background: rgba(247,244,239,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
}
.filter-inner { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.filter-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 20px;
  border-radius: var(--radius-badge);
  font-size: 13px;
  font-weight: 500;
  background: #F0EDE8;
  color: var(--color-text-sub);
  border: 1px solid transparent;
  transition: all var(--transition);
  cursor: pointer;
}
.filter-tag:hover { color: var(--color-text-main); border-color: var(--color-border); }
.filter-tag.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(232,147,12,0.25);
}

/* ===== 双栏内容列表 ===== */
.category-layout {
  padding: 56px 0 72px;
}
.layout-grid {
  display: flex;
  gap: 40px;
  align-items: flex-start;
}
.main-col { flex: 0 0 66.666%; max-width: 66.666%; }
.side-col { flex: 1; max-width: 33.333%; position: sticky; top: 140px; }

/* ===== 内容卡片 ===== */
.content-card {
  display: flex;
  gap: 24px;
  background: var(--color-card);
  border-radius: var(--radius-card);
  padding: 16px;
  box-shadow: var(--shadow-default);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}
.content-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--color-accent);
  transform: scaleY(0);
  transform-origin: center;
  transition: transform var(--transition);
  border-radius: 0 4px 4px 0;
}
.content-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.content-card:hover::before { transform: scaleY(1); }
.content-card .card-cover {
  flex: 0 0 240px;
  max-width: 240px;
  aspect-ratio: 3/2;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
}
.content-card .card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.content-card:hover .card-cover img { transform: scale(1.04); }
.duration-badge {
  position: absolute;
  right: 10px;
  bottom: 10px;
  background: rgba(22,22,31,0.8);
  color: #fff;
  font-size: 12px;
  font-family: var(--font-mono);
  padding: 2px 10px;
  border-radius: var(--radius-badge);
  backdrop-filter: blur(4px);
}
.content-card .card-body { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.content-card .card-title {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--transition);
}
.content-card:hover .card-title { color: var(--color-accent); }
.content-card .card-summary {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.7;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-meta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.card-meta .meta-item { font-size: 12px; color: var(--color-text-weak); display: flex; align-items: center; gap: 4px; }
.card-meta .meta-cat { background: #F0EDE8; color: var(--color-text-sub); padding: 2px 12px; border-radius: var(--radius-badge); font-weight: 500; }

/* ===== 侧边栏 ===== */
.side-widget {
  background: var(--color-card);
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: var(--shadow-default);
  border: 1px solid var(--color-border);
  margin-bottom: 24px;
}
.side-widget h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 8px;
}
.side-widget h3 .widget-icon { color: var(--color-accent); }
.trend-list li { display: flex; align-items: baseline; gap: 14px; padding: 10px 0; border-bottom: 1px solid var(--color-border); }
.trend-list li:last-child { border-bottom: none; }
.trend-num {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text-weak);
  flex: 0 0 28px;
}
.trend-list li:nth-child(-n+3) .trend-num { color: var(--color-accent); }
.trend-list a { font-size: 14px; color: var(--color-text-main); line-height: 1.5; transition: color var(--transition); }
.trend-list a:hover { color: var(--color-accent); }
.cta-card {
  background: var(--color-card);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(232,147,12,0.12);
}
.cta-card .cta-icon { font-size: 32px; margin-bottom: 8px; }
.cta-card h4 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.cta-card p { font-size: 14px; color: var(--color-text-sub); margin-bottom: 16px; }

/* ===== 翻页器 ===== */
.pagination-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
}
.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 14px;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-sub);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}
.page-btn:hover { color: var(--color-accent); border-color: var(--color-accent); }
.page-btn.active { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.page-btn.disabled { opacity: 0.4; pointer-events: none; }

/* ===== CTA 条 ===== */
.cta-strip {
  background: var(--color-dark);
  padding: 56px 0;
}
.cta-strip-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-strip h3 { color: #fff; font-size: 24px; margin-bottom: 8px; }
.cta-strip p { color: var(--color-text-light-sub); font-size: 15px; margin-bottom: 0; }

/* ===== FAQ 区块 ===== */
.faq-section { padding: var(--space-section) 0; background: var(--color-bg); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-item:last-child { border-bottom: none; }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-main);
  transition: color var(--transition);
  user-select: none;
}
.faq-question:hover { color: var(--color-accent); }
.faq-item.open .faq-question { color: var(--color-accent); }
.faq-icon {
  flex: 0 0 26px;
  height: 26px;
  position: relative;
  border-radius: 50%;
  border: 2px solid var(--color-text-weak);
  transition: all var(--transition);
}
.faq-icon::before, .faq-icon::after {
  content: '';
  position: absolute;
  background: var(--color-text-weak);
  transition: all var(--transition);
}
.faq-icon::before { width: 10px; height: 2px; top: 10px; left: 6px; }
.faq-icon::after { width: 2px; height: 10px; top: 6px; left: 10px; }
.faq-item.open .faq-icon { border-color: var(--color-accent); transform: rotate(45deg); }
.faq-item.open .faq-icon::before, .faq-item.open .faq-icon::after { background: var(--color-accent); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out;
  padding-left: 0;
}
.faq-answer-inner {
  padding-bottom: 24px;
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.8;
  max-width: 680px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-dark);
  color: #fff;
  padding: 64px 0 0;
}
.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--color-border-light);
}
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-size: 20px; font-weight: 700; }
.footer-brand .brand-icon { color: var(--color-accent); }
.footer-tagline { font-size: 14px; color: var(--color-text-light-sub); margin-top: 4px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  color: var(--color-text-light-sub);
  transition: all var(--transition);
}
.footer-social a svg { width: 18px; height: 18px; }
.footer-social a:hover { background: var(--color-accent); color: #fff; transform: translateY(-3px); }
.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 40px 0;
}
.footer-links h4 { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 14px; }
.footer-links ul li { margin-bottom: 8px; }
.footer-links ul li a { font-size: 13px; color: var(--color-text-light-sub); transition: color var(--transition); }
.footer-links ul li a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--color-text-light-sub);
}
.footer-misc { display: flex; gap: 24px; }
.footer-misc a { color: var(--color-text-light-sub); font-size: 13px; }
.footer-misc a:hover { color: #fff; }

/* ===== 动画 ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-up { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.animate-up.visible { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .banner-inner { flex-direction: column; }
  .banner-content { flex: 0 0 100%; }
  .banner-visual { width: 100%; }
  .layout-grid { flex-direction: column; }
  .main-col, .side-col { flex: 0 0 100%; max-width: 100%; }
  .side-col { position: static; }
  .content-card { flex-direction: column; }
  .content-card .card-cover { max-width: 100%; aspect-ratio: 16/9; }
}

@media (max-width: 768px) {
  .site-header .header-inner { flex-direction: row; align-items: center; justify-content: space-between; height: 64px; }
  .brand-row { padding: 0; }
  .channel-row { display: none; }
  .header-actions { display: none; }
  .header-burger { display: flex; width: 40px; height: 40px; align-items: center; justify-content: center; color: #fff; }
  .header-burger svg { width: 22px; height: 22px; }
  .mobile-menu {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(22,22,31,0.98);
    z-index: 999;
    padding: 80px 32px 32px;
    transform: translateX(100%);
    transition: transform 0.3s ease-out;
    overflow-y: auto;
  }
  .mobile-menu.open { transform: translateX(0); }
  .mobile-menu nav ul li { margin-bottom: 6px; }
  .mobile-menu nav ul li a {
    display: block;
    color: rgba(255,255,255,0.85);
    font-size: 24px;
    font-weight: 600;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .mobile-menu nav ul li a.active { color: var(--color-accent); }
  .page-banner { padding: 110px 0 40px; }
  .banner-content h1 { font-size: 28px; }
  .filter-bar { top: 64px; }
  .filter-tag { font-size: 13px; padding: 6px 16px; }
  .footer-links { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-strip-inner { flex-direction: column; text-align: center; }
  .section-pad { padding: var(--space-section-mobile) 0; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .content-card { padding: 12px; }
  .content-card .card-title { font-size: 17px; }
  .card-meta { gap: 10px; }
  .banner-meta { gap: 14px; }
  .pagination-bar { flex-wrap: wrap; }
}