/* roulang page: index */
:root {
  --primary: #1a3c34;
  --primary-light: #2a5a4e;
  --primary-dark: #122b24;
  --accent: #c8a96a;
  --accent-light: #e8d5b0;
  --accent-dark: #b08d4a;
  --bg: #f7f5f0;
  --bg-alt: #fffdf8;
  --text: #2d2d2d;
  --text-light: #6b766f;
  --text-muted: #8a948d;
  --border: #e5e0d8;
  --border-dark: #d3ccbf;
  --radius: 20px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --shadow: 0 4px 24px rgba(26, 60, 52, 0.08);
  --shadow-lg: 0 8px 40px rgba(26, 60, 52, 0.14);
  --shadow-accent: 0 6px 30px rgba(200, 169, 106, 0.3);
  --transition: all .3s cubic-bezier(.4,0,.2,1);
  --font-base: "PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-base);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
.btn {
  border-radius: 50px;
  font-weight: 600;
  padding: 12px 28px;
  border: 2px solid transparent;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #1a1a1a;
}
.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}
.btn-outline {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.btn-light {
  background: rgba(255,255,255,.2);
  border-color: rgba(255,255,255,.6);
  color: #fff;
  backdrop-filter: blur(4px);
}
.btn-light:hover {
  background: rgba(255,255,255,.3);
  color: #fff;
  transform: translateY(-2px);
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-dark);
  background: rgba(200,169,106,.12);
  padding: 6px 16px;
  border-radius: 50px;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 12px;
}
.section-desc {
  font-size: 16px;
  color: var(--text-light);
  max-width: 720px;
  margin-bottom: 40px;
  line-height: 1.8;
}
@media (max-width: 768px) {
  .section-title { font-size: 1.6rem; }
  .section-desc { font-size: 15px; margin-bottom: 28px; }
}

/* ===== 左侧竖向导航 ===== */
.side-nav {
  position: fixed;
  left: 0; top: 0; bottom: 0;
  width: 280px;
  background: linear-gradient(180deg, var(--primary-dark) 0%, var(--primary) 100%);
  z-index: 1040;
  display: flex;
  flex-direction: column;
  padding: 36px 24px;
  transition: var(--transition);
  overflow-y: auto;
  border-right: 1px solid rgba(255,255,255,.06);
}
.side-nav::before {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 100%;
  height: 220px;
  background: radial-gradient(circle at 80% 20%, rgba(200,169,106,.18) 0%, transparent 60%);
  pointer-events: none;
}
.brand {
  display: flex;
  flex-direction: column;
  padding: 16px 4px 28px;
  border-bottom: 1px solid rgba(255,255,255,.12);
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}
.brand-logo {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  line-height: 1.4;
  letter-spacing: 1px;
}
.brand-logo span {
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  display: block;
  margin-top: 6px;
  letter-spacing: 3px;
}
.nav-menu {
  flex: 1;
  position: relative;
  z-index: 1;
}
.nav-menu .nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  color: rgba(255,255,255,.75);
  border-radius: 12px;
  font-weight: 500;
  font-size: 15px;
  margin-bottom: 4px;
  transition: var(--transition);
  position: relative;
}
.nav-menu .nav-link i {
  font-size: 18px;
  width: 22px;
  text-align: center;
}
.nav-menu .nav-link:hover {
  background: rgba(255,255,255,.08);
  color: #fff;
  transform: translateX(4px);
}
.nav-menu .nav-link.active {
  background: rgba(200,169,106,.2);
  color: var(--accent-light);
  font-weight: 600;
}
.nav-menu .nav-link.active::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 22px;
  background: var(--accent);
  border-radius: 4px;
}
.nav-contact {
  padding: 20px 12px;
  background: rgba(255,255,255,.05);
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.08);
  color: rgba(255,255,255,.7);
  font-size: 14px;
  margin-top: 16px;
  position: relative;
  z-index: 1;
}
.nav-contact .phone {
  font-size: 18px;
  color: var(--accent);
  font-weight: 700;
  margin-top: 4px;
}
.nav-contact .label {
  font-size: 13px;
  color: rgba(255,255,255,.5);
}

/* ===== 主内容区 ===== */
.main-area {
  margin-left: 280px;
  min-height: 100vh;
  background: var(--bg);
}
.container-site {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 48px;
}
@media (max-width: 768px) {
  .container-site { padding: 0 20px; }
}

/* ===== 移动端顶部导航 ===== */
.mobile-topbar {
  display: none;
  position: sticky;
  top: 0;
  z-index: 1050;
  background: var(--primary);
  padding: 14px 20px;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 20px rgba(0,0,0,.2);
}
.mobile-topbar .mb-brand {
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.2;
}
.mobile-topbar .mb-brand small {
  display: block;
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 2px;
}
.menu-toggle {
  background: transparent;
  border: 1px solid rgba(255,255,255,.3);
  color: #fff;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}
.menu-toggle:hover {
  background: rgba(255,255,255,.15);
}
.side-nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 1030;
  backdrop-filter: blur(2px);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 120px 0 100px;
  background: linear-gradient(135deg, #1a3c34 0%, #2a5a4e 50%, #3a6a5c 100%);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.jpg');
  background-size: cover;
  background-position: center;
  opacity: .25;
  animation: heroPan 24s ease-in-out infinite alternate;
}
@keyframes heroPan {
  0% { transform: scale(1) translateX(0); }
  100% { transform: scale(1.08) translateX(-20px); }
}
.hero::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse at 80% 30%, rgba(200,169,106,.2) 0%, transparent 55%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  color: var(--accent-light);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 500;
  backdrop-filter: blur(8px);
  margin-bottom: 24px;
}
.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.25;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: .5px;
}
.hero h1 span {
  color: var(--accent);
}
.hero-lead {
  font-size: 17px;
  color: rgba(255,255,255,.85);
  line-height: 1.9;
  margin-bottom: 32px;
  max-width: 560px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
}
.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  color: rgba(255,255,255,.6);
  font-size: 14px;
}
.hero-points i {
  color: var(--accent);
  margin-right: 4px;
}

/* 对比卡 */
.compare-wrap {
  position: relative;
  z-index: 2;
  padding: 20px 0;
}
.compare-card {
  border-radius: 20px;
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
}
.compare-card .plan-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.compare-card .plan-desc {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 16px;
}
.compare-card .price {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 16px;
}
.compare-card .price small {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-muted);
}
.compare-card .features {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
}
.compare-card .features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-light);
  padding: 6px 0;
}
.compare-card .features li i {
  color: var(--accent);
  font-size: 14px;
}
.compare-card.default {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.compare-card.highlight {
  background: #fff;
  border: 2px solid var(--accent);
  box-shadow: 0 12px 48px rgba(200,169,106,.35);
  transform: scale(1.02);
}
.compare-card.highlight .badge-recommend {
  position: absolute;
  top: -14px;
  right: 20px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: 50px;
  box-shadow: 0 4px 16px rgba(200,169,106,.4);
  letter-spacing: 1px;
}
.compare-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.compare-card.highlight:hover {
  transform: scale(1.03) translateY(-4px);
  box-shadow: 0 16px 52px rgba(200,169,106,.45);
}
@media (max-width: 991px) {
  .hero { padding: 80px 0 60px; }
  .hero h1 { font-size: 2rem; }
  .compare-wrap { padding: 30px 0 0; }
  .compare-card.highlight { transform: none; }
  .compare-card.highlight:hover { transform: translateY(-4px); }
}

/* ===== 板块通用 ===== */
.section-block {
  padding: 100px 0;
}
.section-block.alt {
  background: var(--bg-alt);
  position: relative;
}
.section-block.alt::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.section-head {
  max-width: 860px;
  margin-bottom: 48px;
}

/* ===== 数据指标 ===== */
.stats-section {
  padding: 72px 0;
  background: var(--primary-dark);
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.jpg');
  background-size: cover;
  background-position: center;
  opacity: .15;
}
.stats-section .stat-item {
  text-align: center;
  padding: 24px 16px;
  position: relative;
  z-index: 1;
}
.stats-section .stat-num {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}
.stats-section .stat-label {
  font-size: 15px;
  color: rgba(255,255,255,.7);
  margin-top: 8px;
  letter-spacing: 1px;
}
.stats-section .stat-item i {
  font-size: 28px;
  color: rgba(255,255,255,.4);
  margin-bottom: 12px;
}
@media (max-width: 768px) {
  .stats-section { padding: 48px 0; }
  .stats-section .stat-num { font-size: 2rem; }
}

/* ===== 佣金亮点 ===== */
.commission-grid .feature-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: var(--transition);
  height: 100%;
  position: relative;
  overflow: hidden;
}
.commission-grid .feature-card::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transform: scaleX(0);
  transition: var(--transition);
  transform-origin: left;
}
.commission-grid .feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-dark);
}
.commission-grid .feature-card:hover::after {
  transform: scaleX(1);
}
.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  background: rgba(200,169,106,.15);
  color: var(--accent-dark);
  margin-bottom: 20px;
}
.feature-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}
.feature-card p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 0;
}
.highlight-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-dark);
  display: block;
  margin-bottom: 4px;
}

/* ===== 推广物料 ===== */
.materials-grid .material-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.material-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-dark);
}
.material-card .thumb {
  height: 200px;
  overflow: hidden;
  position: relative;
}
.material-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}
.material-card:hover .thumb img {
  transform: scale(1.06);
}
.material-card .thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.35) 0%, transparent 60%);
}
.material-card .material-tag {
  position: absolute;
  top: 16px; left: 16px;
  background: rgba(26,60,52,.85);
  color: var(--accent-light);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 50px;
  z-index: 2;
  backdrop-filter: blur(4px);
}
.material-card .card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.material-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}
.material-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}
.material-card .card-meta {
  font-size: 13px;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  padding-top: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ===== 主题精选 ===== */
.topics-grid .topic-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
  height: 100%;
  position: relative;
  cursor: pointer;
}
.topics-grid .topic-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  background: #fff;
}
.topics-grid .topic-card .topic-icon {
  font-size: 32px;
  color: var(--accent-dark);
  margin-bottom: 16px;
}
.topics-grid .topic-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
}
.topics-grid .topic-card p {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 16px;
  line-height: 1.7;
}
.topics-grid .topic-card .topic-link {
  font-size: 14px;
  color: var(--accent-dark);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.topics-grid .topic-card .topic-link i {
  transition: var(--transition);
}
.topics-grid .topic-card:hover .topic-link i {
  transform: translateX(4px);
}

/* ===== 资讯 ===== */
.news-section .news-list .news-item {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
  align-items: flex-start;
}
.news-section .news-list .news-item:first-child {
  padding-top: 0;
}
.news-item:hover {
  padding-left: 8px;
}
.news-item .date {
  min-width: 60px;
  text-align: center;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px 6px;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.news-item .date b {
  font-size: 20px;
  color: var(--primary);
  font-weight: 800;
}
.news-item .news-info h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.5;
  transition: var(--transition);
}
.news-item:hover .news-info h4 {
  color: var(--accent-dark);
}
.news-item .news-info p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 0;
}
.news-sidebar .side-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}
.side-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}
.side-card .hot-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.side-card .hot-tags .tag {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--text-light);
  transition: var(--transition);
  cursor: pointer;
}
.side-card .hot-tags .tag:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.side-card .rank-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 14px;
  color: var(--text-light);
  transition: var(--transition);
  cursor: pointer;
}
.side-card .rank-list li:last-child {
  border-bottom: none;
}
.side-card .rank-list li:hover {
  color: var(--accent-dark);
  padding-left: 6px;
}
.side-card .rank-list .rank-num {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--primary);
  color: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}
.side-card .rank-list .rank-num.top {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
}

/* ===== 用户评价 ===== */
.testimonials-section {
  background: var(--primary);
  position: relative;
  overflow: hidden;
}
.testimonials-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-3.jpg');
  background-size: cover;
  background-position: center;
  opacity: .15;
}
.testimonials-section .section-title,
.testimonials-section .section-desc {
  color: #fff;
}
.testimonials-section .section-desc {
  color: rgba(255,255,255,.7);
}
.testimonial-card {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius);
  padding: 32px;
  backdrop-filter: blur(10px);
  height: 100%;
  transition: var(--transition);
  position: relative;
  z-index: 1;
}
.testimonial-card:hover {
  background: rgba(255,255,255,.14);
  transform: translateY(-6px);
}
.testimonial-card .stars {
  color: var(--accent);
  font-size: 14px;
  margin-bottom: 16px;
}
.testimonial-card .quote {
  font-size: 15px;
  color: rgba(255,255,255,.9);
  line-height: 1.9;
  margin-bottom: 20px;
  font-style: normal;
}
.testimonial-card .author {
  display: flex;
  align-items: center;
  gap: 14px;
}
.testimonial-card .avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.testimonial-card .author-name {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
}
.testimonial-card .author-meta {
  font-size: 13px;
  color: rgba(255,255,255,.5);
}

/* ===== FAQ ===== */
.faq-item {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  transition: var(--transition);
  overflow: hidden;
}
.faq-item:hover {
  border-color: var(--border-dark);
  box-shadow: var(--shadow);
}
.faq-item .faq-q {
  padding: 22px 28px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: var(--transition);
}
.faq-item .faq-q i {
  color: var(--accent);
  transition: var(--transition);
}
.faq-item.open .faq-q i {
  transform: rotate(45deg);
}
.faq-item .faq-a {
  padding: 0 28px;
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}
.faq-item.open .faq-a {
  max-height: 300px;
  padding: 0 28px 22px;
}
.faq-item .faq-a p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.85;
  margin-bottom: 0;
  border-top: 1px dashed var(--border);
  padding-top: 16px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.cta-card {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 24px;
  padding: 64px 56px;
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: "";
  position: absolute;
  top: -40%; right: -20%;
  width: 60%;
  height: 140%;
  background: radial-gradient(circle, rgba(200,169,106,.25) 0%, transparent 60%);
  border-radius: 50%;
}
.cta-card::after {
  content: "";
  position: absolute;
  bottom: -40%; left: -10%;
  width: 40%;
  height: 120%;
  background: radial-gradient(circle, rgba(255,255,255,.08) 0%, transparent 60%);
}
.cta-card .cta-content {
  position: relative;
  z-index: 1;
  color: #fff;
}
.cta-card h2 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 16px;
}
.cta-card p {
  font-size: 16px;
  color: rgba(255,255,255,.8);
  margin-bottom: 28px;
  max-width: 640px;
  line-height: 1.9;
}
.cta-card .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.cta-card .btn-light {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--primary-dark);
  font-weight: 700;
}
.cta-card .btn-light:hover {
  background: var(--accent-light);
  border-color: var(--accent-light);
  transform: translateY(-2px);
}
.cta-card .btn-outline-light {
  background: transparent;
  border: 2px solid rgba(255,255,255,.5);
  color: #fff;
}
.cta-card .btn-outline-light:hover {
  border-color: #fff;
  background: rgba(255,255,255,.1);
  transform: translateY(-2px);
}
.cta-card .cta-contact {
  display: flex;
  gap: 28px;
  margin-top: 32px;
  font-size: 14px;
  color: rgba(255,255,255,.6);
}
.cta-card .cta-contact i {
  color: var(--accent);
  margin-right: 8px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--primary-dark);
  padding: 64px 0 32px;
  position: relative;
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light), var(--accent));
}
.site-footer .footer-brand {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  line-height: 1.4;
  margin-bottom: 16px;
}
.site-footer .footer-brand small {
  display: block;
  font-size: 14px;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 2px;
  margin-top: 4px;
}
.site-footer .footer-desc {
  font-size: 14px;
  color: rgba(255,255,255,.5);
  line-height: 1.9;
  margin-bottom: 20px;
  max-width: 320px;
}
.site-footer .footer-contact p {
  font-size: 14px;
  color: rgba(255,255,255,.6);
  margin-bottom: 8px;
}
.site-footer .footer-contact i {
  width: 22px;
  color: var(--accent);
}
.site-footer .footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.site-footer .footer-links li {
  margin-bottom: 10px;
}
.site-footer .footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,.55);
  transition: var(--transition);
}
.site-footer .footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 14px;
  color: rgba(255,255,255,.4);
}

/* ===== 响应式 ===== */
@media (max-width: 1199px) {
  .hero h1 { font-size: 2.4rem; }
  .container-site { padding: 0 32px; }
}
@media (max-width: 991px) {
  .side-nav { transform: translateX(-100%); box-shadow: 4px 0 30px rgba(0,0,0,.2); }
  .side-nav.open { transform: translateX(0); }
  .side-nav-backdrop.show { display: block; }
  .main-area { margin-left: 0; }
  .mobile-topbar { display: flex; }
  .container-site { padding: 0 24px; }
  .section-block { padding: 70px 0; }
  .hero { padding: 90px 0 60px; }
  .hero h1 { font-size: 2rem; }
  .compare-card.highlight { transform: none; }
  .cta-card { padding: 40px 28px; }
  .cta-card h2 { font-size: 1.6rem; }
}
@media (max-width: 768px) {
  .hero { padding: 70px 0 50px; }
  .hero h1 { font-size: 1.7rem; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .stats-section .stat-item { padding: 16px 8px; }
  .features-grid .col-md-6,
  .materials-grid .col-md-6,
  .topics-grid .col-md-6 {
    padding-left: 12px;
    padding-right: 12px;
  }
  .news-section .news-list .news-item {
    flex-direction: column;
    gap: 12px;
    padding: 20px 0;
  }
  .news-item .date {
    flex-direction: row;
    gap: 6px;
    min-width: auto;
  }
  .testimonial-card { padding: 24px; }
  .section-block { padding: 56px 0; }
  .cta-section { padding: 60px 0; }
  .cta-card { padding: 32px 20px; border-radius: 20px; }
  .site-footer { padding: 48px 0 24px; }
  .footer-bottom { margin-top: 32px; }
}
@media (max-width: 520px) {
  .container-site { padding: 0 16px; }
  .hero h1 { font-size: 1.45rem; }
  .hero-lead { font-size: 15px; }
  .compare-card { padding: 24px 20px; }
  .price-card .price { font-size: 30px; }
  .section-title { font-size: 1.4rem; }
  .material-card .thumb { height: 170px; }
  .cta-card h2 { font-size: 1.4rem; }
  .cta-card .cta-actions .btn { width: 100%; justify-content: center; }
  .cta-card .cta-contact { flex-direction: column; gap: 12px; }
  .faq-item .faq-q { font-size: 15px; padding: 18px 20px; }
  .faq-item .faq-a { padding: 0 20px; }
  .faq-item.open .faq-a { padding: 0 20px 18px; }
}

/* 辅助类 */
.text-accent { color: var(--accent); }
.bg-dark-primary { background: var(--primary); }
.rounded-20 { border-radius: var(--radius); }