/* roulang page: index */
:root {
  --primary: #0E4C5C;
  --primary-light: #E8F2F1;
  --primary-lighter: #F0F5F4;
  --accent: #FF7F50;
  --accent-dark: #E8653A;
  --bg-warm: #F7F5F0;
  --bg-white: #FFFFFF;
  --border: #E5E2D8;
  --heading-color: #1A2B33;
  --body-color: #3D4A52;
  --muted-color: #7A868C;
  --radius-card: 16px;
  --radius-btn: 8px;
  --radius-input: 8px;
  --radius-badge: 999px;
  --shadow-card: 0 4px 20px rgba(14,76,92,0.06);
  --shadow-hover: 0 8px 32px rgba(14,76,92,0.12);
  --shadow-cta: 0 4px 16px rgba(255,127,80,0.35);
  --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, sans-serif;
  --ease: 0.2s ease;
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.75;
  color: var(--body-color);
  background: var(--bg-white);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--accent-dark);
}
button {
  font-family: var(--font-family);
  cursor: pointer;
}
input, select, textarea {
  font-family: var(--font-family);
  font-size: 15px;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 80px 0;
}
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-label {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.section-label::before {
  content: "— ";
  color: var(--accent);
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--heading-color);
  margin: 0 0 12px;
}
.section-head .section-sub {
  font-size: 16px;
  color: var(--muted-color);
  margin: 0;
}

/* ===== 左侧导航（桌面） ===== */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 240px;
  background: var(--bg-white);
  border-right: 1px solid var(--border);
  z-index: 60;
  display: flex;
  flex-direction: column;
  padding: 0;
}
.side-nav .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 32px 24px 24px;
  border-bottom: 1px solid var(--border);
}
.side-nav .brand-logo {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  border-radius: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 14px;
}
.side-nav .brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--heading-color);
  letter-spacing: 0.5px;
}
.side-nav .nav-group {
  padding: 16px 0;
}
.side-nav .nav-group-title {
  font-size: 12px;
  color: var(--muted-color);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0 24px;
  margin-bottom: 8px;
}
.side-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.side-nav ul li a {
  display: block;
  padding: 10px 24px;
  font-size: 15px;
  color: #6A757B;
  transition: all 0.2s ease;
  position: relative;
  border-left: 3px solid transparent;
}
.side-nav ul li a:hover {
  color: var(--primary);
  background: rgba(14,76,92,0.04);
}
.side-nav ul li a.active {
  color: var(--primary);
  font-weight: 600;
  border-left-color: var(--primary);
  background: rgba(14,76,92,0.03);
}
.side-nav .side-contact {
  margin-top: auto;
  padding: 24px;
  border-top: 1px solid var(--border);
}
.side-nav .side-contact p {
  font-size: 13px;
  color: var(--muted-color);
  margin: 4px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.side-nav .side-contact i {
  color: var(--primary);
  width: 16px;
}

/* ===== 移动端头部 ===== */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 70;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
}
.mobile-header .mobile-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--heading-color);
  display: flex;
  align-items: center;
  gap: 8px;
}
.mobile-header .mobile-brand .brand-logo {
  width: 30px;
  height: 30px;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}
.mobile-header .menu-toggle {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--heading-color);
  padding: 4px 8px;
  border-radius: 6px;
}
.mobile-header .menu-toggle:hover {
  background: var(--primary-light);
}
.mobile-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-white);
  box-shadow: 0 8px 24px rgba(14,76,92,0.12);
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.mobile-menu.open {
  display: block;
}
.mobile-menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.mobile-menu ul li a {
  display: block;
  padding: 12px 8px;
  font-size: 16px;
  color: var(--body-color);
  border-bottom: 1px solid rgba(0,0,0,0.04);
}
.mobile-menu ul li:last-child a {
  border-bottom: none;
}
.mobile-menu ul li a:hover {
  color: var(--primary);
}

/* ===== 主内容 ===== */
.main-content {
  margin-left: 240px;
  min-height: 100vh;
  min-width: 0;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 75vh;
  max-height: 80vh;
  background: linear-gradient(75deg, rgba(247,245,240,0.97) 25%, rgba(247,245,240,0.6) 60%, rgba(247,245,240,0.25) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  display: flex;
  align-items: center;
  padding: 60px 56px;
  overflow: hidden;
}
.hero .grid-x {
  width: 100%;
  align-items: center;
}
.hero h1 {
  font-size: 42px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--heading-color);
  margin: 0 0 16px;
}
.hero h1 .highlight {
  color: var(--primary);
  position: relative;
}
.hero .hero-sub {
  font-size: 18px;
  color: var(--muted-color);
  margin: 0 0 28px;
  max-width: 420px;
}
.hero-ctas {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 40px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  transition: all 0.2s ease;
  border: none;
  text-decoration: none;
  cursor: pointer;
  line-height: 1.4;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(14,76,92,0.15);
}
.btn-primary {
  background: var(--accent);
  color: #fff !important;
}
.btn-primary:hover {
  background: var(--accent-dark);
  color: #fff !important;
  box-shadow: var(--shadow-cta);
}
.btn-text {
  background: none;
  border: none;
  color: var(--primary) !important;
  font-weight: 600;
  padding: 12px 8px;
  position: relative;
}
.btn-text:hover {
  color: var(--accent-dark) !important;
  box-shadow: none;
  transform: none;
  background: none;
}
.btn-text::after {
  content: "→";
  margin-left: 6px;
  transition: transform 0.2s ease;
}
.btn-text:hover::after {
  transform: translateX(3px);
}
.hero-stats {
  display: flex;
  gap: 0;
  margin-top: 8px;
}
.hero-stats .cell {
  text-align: center;
  padding: 8px 0;
  border-right: 1px solid var(--border);
}
.hero-stats .cell:last-child {
  border-right: none;
}
.hero-stats .stat-num {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  display: block;
  line-height: 1.2;
}
.hero-stats .stat-label {
  font-size: 13px;
  color: var(--muted-color);
  display: block;
  margin-top: 4px;
}
.hero-visual {
  position: relative;
  padding: 0 20px;
}
.hero-visual img {
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-hover);
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4/3;
  background: var(--primary-light);
}
.hero-float-card {
  position: absolute;
  background: var(--bg-white);
  border-radius: 12px;
  box-shadow: var(--shadow-card);
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--heading-color);
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-float-card .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.hero-float-card.fc-1 {
  top: 20px;
  right: -4px;
}
.hero-float-card.fc-2 {
  bottom: 40px;
  left: -8px;
}

/* ===== 板块通用 ===== */
.section-white {
  background: var(--bg-white);
}
.section-warm {
  background: var(--bg-warm);
}
.section-light {
  background: var(--primary-lighter);
}

/* ===== 卖点卡片 ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.3s ease;
}
.feature-card:hover {
  box-shadow: var(--shadow-hover);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-btn);
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 20px;
  margin-bottom: 20px;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--heading-color);
  margin: 0 0 10px;
}
.feature-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--body-color);
  margin: 0;
}

/* ===== 演示区 ===== */
.demo-row {
  display: flex;
  align-items: center;
  gap: 5%;
  margin-bottom: 80px;
}
.demo-row:last-child {
  margin-bottom: 0;
}
.demo-row:nth-child(2) {
  flex-direction: row-reverse;
}
.demo-media {
  width: 55%;
  flex-shrink: 0;
}
.demo-media img {
  width: 100%;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-hover);
  object-fit: cover;
  aspect-ratio: 16/9;
  background: var(--primary-light);
}
.demo-media figcaption {
  font-size: 12px;
  color: var(--muted-color);
  text-align: center;
  margin-top: 8px;
}
.demo-text {
  width: 40%;
}
.demo-text .demo-label {
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 12px;
  display: inline-block;
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: var(--radius-badge);
}
.demo-text h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--heading-color);
  margin: 0 0 14px;
}
.demo-text p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--body-color);
  margin: 0;
}

/* ===== 证据区 ===== */
.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.proof-card {
  background: var(--primary-lighter);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  text-align: center;
  transition: box-shadow 0.3s ease;
}
.proof-card:hover {
  box-shadow: var(--shadow-hover);
}
.proof-card .proof-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  display: block;
  line-height: 1.2;
  margin-bottom: 4px;
}
.proof-card .proof-label {
  font-size: 12px;
  color: var(--muted-color);
  display: block;
  margin-bottom: 12px;
}
.proof-card .proof-desc {
  font-size: 14px;
  color: var(--body-color);
  margin: 0;
}
.proof-banner {
  background: var(--primary);
  border-radius: var(--radius-card);
  padding: 32px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #fff;
  gap: 24px;
  flex-wrap: wrap;
}
.proof-banner h3 {
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 6px;
  color: #fff;
}
.proof-banner p {
  font-size: 14px;
  color: rgba(255,255,255,0.8);
  margin: 0;
}
.proof-banner .btn-primary {
  background: var(--accent);
  color: #fff;
  white-space: nowrap;
}
.proof-banner .btn-primary:hover {
  background: var(--accent-dark);
}

/* ===== 资讯卡片 ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.3s ease;
}
.news-card:hover {
  box-shadow: var(--shadow-hover);
}
.news-card-img {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: var(--primary-light);
}
.news-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.news-card:hover .news-card-img img {
  transform: scale(1.03);
}
.news-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.news-card-body .badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-badge);
  margin-bottom: 12px;
  align-self: flex-start;
}
.news-card-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--heading-color);
  margin: 0 0 8px;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 48px;
}
.news-card-body p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--body-color);
  margin: 0 0 16px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 12px;
  font-size: 13px;
  color: var(--muted-color);
}
.news-card-meta a {
  font-weight: 600;
  color: var(--primary);
}
.news-card-meta a:hover {
  color: var(--accent-dark);
}
.news-empty {
  background: var(--primary-lighter);
  border-radius: var(--radius-card);
  padding: 48px 32px;
  text-align: center;
  color: var(--muted-color);
  font-size: 16px;
}
.news-empty i {
  font-size: 36px;
  color: var(--primary);
  margin-bottom: 16px;
  display: block;
  opacity: 0.5;
}
.news-empty p {
  margin: 0;
}

/* ===== 价格 ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.pricing-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.3s ease;
  position: relative;
}
.pricing-card:hover {
  box-shadow: var(--shadow-hover);
}
.pricing-card.recommended {
  border: 2px solid var(--primary);
  box-shadow: 0 8px 32px rgba(14,76,92,0.12);
}
.pricing-card.recommended .pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: var(--radius-badge);
  white-space: nowrap;
}
.pricing-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--heading-color);
  margin: 0 0 16px;
}
.pricing-card .price {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}
.pricing-card .price small {
  font-size: 14px;
  color: var(--muted-color);
  font-weight: 400;
}
.pricing-card .price-desc {
  font-size: 13px;
  color: var(--muted-color);
  margin-bottom: 24px;
}
.pricing-card ul {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  flex: 1;
}
.pricing-card ul li {
  font-size: 14px;
  line-height: 2;
  color: var(--body-color);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.pricing-card ul li i {
  color: var(--primary);
  font-size: 14px;
  margin-top: 6px;
  flex-shrink: 0;
}
.pricing-card .btn {
  width: 100%;
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary) !important;
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff !important;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
}
.faq-tip {
  max-width: 760px;
  margin: 0 auto 32px;
  background: var(--primary-light);
  border-radius: 12px;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--heading-color);
}
.faq-tip i {
  color: var(--primary);
  font-size: 18px;
  flex-shrink: 0;
}
.faq-tip a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: underline;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  background: var(--bg-white);
  overflow: hidden;
}
.faq-item.active {
  border-color: var(--primary);
  box-shadow: var(--shadow-card);
}
.faq-q {
  width: 100%;
  background: none;
  border: none;
  padding: 16px 24px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--heading-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 44px;
}
.faq-q i {
  color: var(--muted-color);
  font-size: 14px;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-q i {
  transform: rotate(180deg);
  color: var(--primary);
}
.faq-a {
  display: none;
  padding: 0 24px 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--body-color);
}
.faq-item.active .faq-a {
  display: block;
}

/* ===== 联系区 ===== */
.contact-wrap {
  background: var(--bg-warm);
  border-radius: var(--radius-card);
  padding: 40px 48px;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}
.contact-info h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--heading-color);
  margin: 0 0 8px;
}
.contact-info > p {
  color: var(--muted-color);
  font-size: 15px;
  margin: 0 0 24px;
}
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 20px;
}
.contact-info-item i {
  width: 36px;
  height: 36px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
  margin-top: 2px;
}
.contact-info-item .label {
  font-size: 13px;
  color: var(--muted-color);
  display: block;
  margin-bottom: 2px;
}
.contact-info-item .value {
  font-size: 15px;
  color: var(--heading-color);
  font-weight: 500;
}
.contact-form .form-group {
  margin-bottom: 18px;
}
.contact-form label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--heading-color);
  margin-bottom: 6px;
}
.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  border: 1px solid #D8D5CC;
  border-radius: var(--radius-input);
  padding: 10px 14px;
  font-size: 15px;
  color: var(--heading-color);
  background: var(--bg-white);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  outline: none;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(14,76,92,0.15);
}
.contact-form textarea {
  min-height: 100px;
  resize: vertical;
}
.contact-form .btn-primary {
  width: 100%;
  padding: 14px;
  font-size: 16px;
}
.form-success {
  display: none;
  background: var(--primary-light);
  border: 1px solid var(--primary);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 14px;
  color: var(--primary);
  margin-bottom: 16px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--primary);
  color: #fff;
  padding: 48px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .logo-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.footer-brand .brand-logo {
  width: 34px;
  height: 34px;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
}
.footer-brand .brand-name {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}
.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
  margin: 0;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 16px;
}
.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-col ul li a {
  display: block;
  padding: 5px 0;
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  transition: color 0.2s ease;
}
.footer-col ul li a:hover {
  color: var(--accent);
}
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 14px;
  color: rgba(255,255,255,0.7);
}
.footer-contact-item i {
  color: var(--accent);
  margin-top: 4px;
  flex-shrink: 0;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.3);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  flex-wrap: wrap;
  gap: 8px;
}

/* ===== 悬浮CTA ===== */
.float-cta {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(14,76,92,0.35);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease, background 0.2s ease;
  z-index: 90;
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
}
.float-cta.visible {
  opacity: 1;
  transform: translateY(0);
}
.float-cta:hover {
  background: var(--accent);
  color: #fff;
}

/* ===== 动效 ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .side-nav {
    display: none;
  }
  .mobile-header {
    display: flex;
  }
  .main-content {
    margin-left: 0;
  }
  .hero {
    padding: 48px 24px;
    min-height: auto;
    max-height: none;
  }
  .hero h1 {
    font-size: 32px;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .demo-row {
    flex-direction: column !important;
    gap: 16px;
    align-items: flex-start;
  }
  .demo-media,
  .demo-text {
    width: 100%;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
  .pricing-card.recommended {
    order: -1;
  }
  .proof-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto 32px;
  }
  .news-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
  .contact-wrap {
    grid-template-columns: 1fr;
    padding: 32px 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .float-cta {
    bottom: 20px;
    right: 20px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .hero {
    padding: 40px 20px;
  }
  .hero .hero-visual {
    margin-top: 40px;
  }
  .hero-stats .stat-num {
    font-size: 24px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card,
  .proof-card,
  .news-card {
    padding: 24px 20px;
  }
  .proof-banner {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px 20px;
  }
  .proof-banner .btn {
    width: 100%;
  }
  .faq-tip {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

/* roulang page: article */
:root {
            --primary: #0E4C5C;
            --primary-dark: #0A3A46;
            --primary-light: #E8F2F1;
            --accent: #FF7F50;
            --accent-dark: #F06A3C;
            --bg-warm: #F7F5F0;
            --bg-white: #FFFFFF;
            --border: #E5E2D8;
            --text-dark: #1A2B33;
            --text-body: #3D4A52;
            --text-muted: #7A868C;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow-card: 0 4px 20px rgba(14, 76, 92, 0.06);
            --shadow-hover: 0 8px 32px rgba(14, 76, 92, 0.12);
            --transition: 0.2s ease;
        }
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-body);
            background: var(--bg-white);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        ul, ol {
            list-style: none;
        }

        /* 侧边栏导航 */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 240px;
            height: 100vh;
            background: var(--bg-white);
            border-right: 1px solid var(--border);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 28px 16px 20px;
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 0 8px 20px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 20px;
        }
        .brand-logo {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 15px;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .brand-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
        }
        .sidebar-nav {
            flex: 1;
            overflow-y: auto;
        }
        .sidebar-nav li {
            margin-bottom: 2px;
        }
        .sidebar-nav a {
            display: block;
            padding: 10px 14px;
            border-radius: 8px;
            color: #6A757B;
            font-size: 15px;
            font-weight: 500;
            border-left: 3px solid transparent;
            transition: all var(--transition);
        }
        .sidebar-nav a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .sidebar-nav a.active {
            background: var(--primary-light);
            color: var(--primary);
            border-left-color: var(--primary);
            font-weight: 600;
        }
        .sidebar-contact {
            margin-top: auto;
            padding: 16px 8px 0;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-muted);
        }
        .sidebar-contact .contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }
        .sidebar-contact i {
            color: var(--primary);
            width: 16px;
            text-align: center;
            font-size: 14px;
        }

        /* 移动端导航 */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 2000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            padding: 10px 16px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
        }
        .mobile-brand .brand-logo {
            width: 32px;
            height: 32px;
            font-size: 12px;
            border-radius: 8px;
        }
        .menu-toggle {
            background: none;
            border: none;
            font-size: 20px;
            color: var(--text-dark);
            cursor: pointer;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: var(--primary-light);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 53px;
            left: 0;
            right: 0;
            background: #fff;
            box-shadow: 0 8px 32px rgba(14, 76, 92, 0.12);
            padding: 8px 16px 16px;
            border-bottom: 1px solid var(--border);
            z-index: 1999;
        }
        .mobile-menu.open {
            display: block;
            animation: fadeInDown 0.3s ease;
        }
        .mobile-menu a {
            display: block;
            padding: 12px 8px;
            border-bottom: 1px solid #F0EEE9;
            color: var(--text-body);
            font-size: 15px;
        }
        .mobile-menu a:last-child {
            border-bottom: none;
        }
        .mobile-menu a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        @keyframes fadeInDown {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* 主内容 */
        .main-wrapper {
            margin-left: 240px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .content-area {
            flex: 1;
            padding: 40px 0 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 面包屑 */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 28px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: #C9C5BC;
        }
        .breadcrumb .current {
            color: var(--text-body);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 320px;
        }

        /* 文章头部 */
        .article-header {
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border);
        }
        .article-badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: var(--radius-badge);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .article-header h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.35;
            margin-bottom: 16px;
            max-width: 900px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 24px;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .meta-item i {
            color: var(--primary);
            font-size: 14px;
        }

        /* 文章正文 */
        .article-body {
            max-width: 760px;
            margin: 0 auto 48px;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-body);
        }
        .article-body p {
            margin-bottom: 1.5em;
        }
        .article-body h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-dark);
            margin: 40px 0 20px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
        }
        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-dark);
            margin: 32px 0 16px;
        }
        .article-body img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 32px auto;
            background: var(--primary-light);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-warm);
            padding: 16px 24px;
            border-radius: 0 8px 8px 0;
            margin: 24px 0;
            color: var(--text-body);
        }
        .article-body ul,
        .article-body ol {
            margin: 16px 0;
            padding-left: 24px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
        }

        /* 未找到 */
        .not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .not-found i {
            font-size: 48px;
            color: var(--primary-light);
            margin-bottom: 16px;
        }
        .not-found p {
            font-size: 20px;
            color: var(--text-dark);
            margin-bottom: 24px;
        }

        /* 按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            border: none;
            transition: all var(--transition);
            text-decoration: none;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            color: #fff;
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            transform: translateY(-1px);
            color: #fff;
        }

        /* 分页 */
        .article-pagination {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 760px;
            margin: 0 auto 48px;
            padding: 20px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .pag-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            color: var(--primary);
            font-weight: 500;
            padding: 8px 12px;
            border-radius: var(--radius-btn);
            transition: background var(--transition);
            text-decoration: none;
        }
        .pag-link:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* 相关推荐 */
        .related-section {
            max-width: 900px;
            margin: 0 auto 48px;
        }
        .related-title {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 24px;
            padding-left: 16px;
            border-left: 4px solid var(--primary);
            line-height: 1.4;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            text-decoration: none;
            transition: box-shadow var(--transition);
        }
        .related-card:hover {
            box-shadow: var(--shadow-hover);
        }
        .related-img {
            width: 100%;
            height: 200px;
            background: var(--primary-light);
            overflow: hidden;
            flex-shrink: 0;
        }
        .related-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }
        .related-card:hover .related-img img {
            transform: scale(1.03);
        }
        .related-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .tag {
            display: inline-block;
            align-self: flex-start;
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .related-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .related-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* 页脚 */
        .site-footer {
            background: var(--primary);
            color: #fff;
            padding: 64px 0 24px;
            margin-top: 32px;
        }
        .site-footer .container {
            max-width: 1200px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .footer-brand .brand-logo {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
        }
        .footer-brand .brand-name {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 0;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            text-decoration: none;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }
        .footer-contact-item i {
            color: var(--accent);
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.3);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.6);
            flex-wrap: wrap;
            gap: 8px;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .sidebar {
                display: none;
            }
            .main-wrapper {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .content-area {
                padding: 24px 0 0;
            }
            .container {
                padding: 0 16px;
            }
            .breadcrumb {
                margin-bottom: 20px;
                font-size: 13px;
            }
            .breadcrumb .current {
                max-width: 180px;
            }
            .article-header {
                margin-bottom: 24px;
                padding-bottom: 20px;
            }
            .article-header h1 {
                font-size: 28px;
                line-height: 1.4;
            }
            .article-meta {
                gap: 16px;
                font-size: 13px;
            }
            .article-body {
                font-size: 15px;
                line-height: 1.75;
                margin-bottom: 32px;
            }
            .article-body h2 {
                font-size: 22px;
                margin: 32px 0 16px;
            }
            .article-body h3 {
                font-size: 18px;
                margin: 24px 0 12px;
            }
            .article-pagination {
                margin-bottom: 32px;
                padding: 16px 0;
            }
            .related-section {
                margin-bottom: 32px;
            }
            .related-title {
                font-size: 20px;
                margin-bottom: 16px;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .related-img {
                height: 180px;
            }
            .site-footer {
                padding: 48px 0 20px;
                margin-top: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                margin-bottom: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .article-header h1 {
                font-size: 24px;
            }
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .related-body {
                padding: 16px 18px 20px;
            }
            .mobile-header {
                padding: 8px 12px;
            }
            .container {
                padding: 0 12px;
            }
        }

        /* 减少动效 */
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0E4C5C;
            --primary-light: #156578;
            --primary-soft: #E8F2F1;
            --accent: #FF7F50;
            --accent-hover: #E86A3C;
            --bg-warm: #F7F5F0;
            --card-bg: #FFFFFF;
            --border: #E5E2D8;
            --heading: #1A2B33;
            --body: #3D4A52;
            --muted: #7A868C;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-input: 8px;
            --shadow-card: 0 4px 20px rgba(14, 76, 92, 0.06);
            --shadow-hover: 0 8px 32px rgba(14, 76, 92, 0.12);
            --transition: 0.2s ease;
            --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--body);
            background: #FFFFFF;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }

        ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .brand-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--heading);
            white-space: nowrap;
        }

        /* 移动端头部 */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 300;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            height: 60px;
            background: rgba(255, 255, 255, 0.95);
            -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
        }

        .mobile-header .mobile-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            font-weight: 700;
            color: var(--heading);
        }

        .menu-toggle {
            background: none;
            border: none;
            font-size: 22px;
            color: var(--heading);
            cursor: pointer;
            padding: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .menu-toggle:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .mobile-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: #fff;
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
            padding: 8px 0;
            z-index: 299;
        }

        .mobile-menu a {
            display: block;
            padding: 12px 24px;
            font-size: 15px;
            color: var(--body);
            border-left: 3px solid transparent;
        }

        .mobile-menu a:hover {
            background: var(--bg-warm);
            color: var(--primary);
        }

        .mobile-menu a.active {
            color: var(--primary);
            font-weight: 600;
            border-left-color: var(--primary);
            background: var(--primary-soft);
        }

        /* 页面外壳 */
        .page-shell {
            display: flex;
            min-height: 100vh;
            background: #fff;
        }

        /* 桌面侧栏 */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 240px;
            background: #fff;
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            padding: 32px 24px 24px;
            z-index: 200;
        }

        .side-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 48px;
            padding: 0 8px;
        }

        .side-menu {
            flex: 1;
        }

        .side-menu li {
            margin-bottom: 4px;
        }

        .side-menu a {
            display: block;
            padding: 11px 16px;
            font-size: 15px;
            color: #6A757B;
            border-left: 3px solid transparent;
            border-radius: 0 8px 8px 0;
            transition: background var(--transition), color var(--transition), border-color var(--transition);
        }

        .side-menu a:hover {
            background: var(--bg-warm);
            color: var(--primary);
        }

        .side-menu a.active {
            color: var(--primary);
            border-left-color: var(--primary);
            background: var(--primary-soft);
            font-weight: 600;
        }

        .side-contact {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            font-size: 13px;
            color: var(--muted);
        }

        .side-contact p {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 8px;
        }

        .side-contact i {
            width: 18px;
            color: var(--primary);
            text-align: center;
        }

        /* 内容包裹 */
        .content-wrapper {
            flex: 1;
            margin-left: 240px;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .main-content {
            flex: 1;
        }

        /* 页面标题条 */
        .page-banner {
            position: relative;
            padding: 72px 48px;
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: center;
            min-height: 320px;
        }

        .page-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(247, 245, 240, 0.94) 20%, rgba(247, 245, 240, 0.70) 55%, rgba(247, 245, 240, 0.50) 80%);
            z-index: 1;
        }

        .page-banner .banner-inner {
            position: relative;
            z-index: 2;
            max-width: 680px;
            width: 100%;
        }

        .page-banner .eyebrow {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 1px;
            margin-bottom: 16px;
            background: rgba(232, 242, 241, 0.85);
            padding: 4px 12px;
            border-radius: 999px;
        }

        .page-banner h1 {
            font-size: clamp(30px, 4vw, 42px);
            line-height: 1.3;
            font-weight: 700;
            color: var(--heading);
            margin-bottom: 20px;
        }

        .page-banner p {
            font-size: 16px;
            line-height: 1.75;
            color: var(--body);
            max-width: 560px;
            margin-bottom: 4px;
        }

        /* 通用区块 */
        .section {
            padding: clamp(48px, 6vw, 80px) 48px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            width: 100%;
        }

        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-head .eyebrow {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 1px;
            position: relative;
            display: inline-block;
            padding-left: 18px;
        }

        .section-head .eyebrow::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 12px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .section-head h2 {
            font-size: clamp(24px, 2.5vw, 32px);
            font-weight: 700;
            color: var(--heading);
            margin: 12px 0 16px;
            line-height: 1.35;
        }

        .section-head p {
            font-size: 15px;
            color: var(--muted);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section-head.left {
            text-align: left;
        }

        .section-head.left .eyebrow::before {
            left: 0;
        }

        .section-head.left p {
            margin: 0;
        }

        /* 服务能力 */
        .service-cell {
            margin-bottom: 24px;
        }

        .service-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px 28px;
            height: 100%;
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .service-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .service-icon {
            width: 56px;
            height: 56px;
            border-radius: 8px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .service-icon i {
            font-size: 24px;
            color: var(--primary);
        }

        .service-card h3 {
            font-size: 18px;
            color: var(--heading);
            margin-bottom: 10px;
            font-weight: 600;
            line-height: 1.4;
        }

        .service-card p {
            font-size: 14px;
            line-height: 1.65;
            color: var(--body);
        }

        /* 适用场景 */
        .scenario-section {
            background: var(--bg-warm);
        }

        .scenario-list .cell {
            margin-bottom: 24px;
        }

        .scenario-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            height: 100%;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .scenario-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .scenario-index {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            opacity: 0.22;
            line-height: 1;
            flex-shrink: 0;
        }

        .scenario-text h3 {
            font-size: 17px;
            color: var(--heading);
            margin-bottom: 6px;
            font-weight: 600;
            line-height: 1.4;
        }

        .scenario-text p {
            font-size: 14px;
            color: var(--body);
            line-height: 1.65;
        }

        /* 服务流程 */
        .workflow-section {
            background: var(--bg-warm);
        }

        .workflow-step {
            text-align: center;
            padding: 36px 28px;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            height: 100%;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition), transform var(--transition);
            margin-bottom: 24px;
        }

        .workflow-step:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
        }

        .workflow-step h3 {
            font-size: 18px;
            color: var(--heading);
            margin-bottom: 10px;
            font-weight: 600;
        }

        .workflow-step p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.65;
        }

        /* 数据案例 */
        .proof-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .proof-text .data-points {
            display: flex;
            gap: 48px;
            margin-top: 40px;
            flex-wrap: wrap;
        }

        .data-item {
            display: flex;
            flex-direction: column;
        }

        .data-num {
            font-size: clamp(28px, 2.5vw, 38px);
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .data-label {
            font-size: 13px;
            color: var(--muted);
            margin-top: 6px;
            line-height: 1.5;
        }

        .proof-image img {
            width: 100%;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            object-fit: cover;
            aspect-ratio: 4 / 3;
            background: var(--primary-soft);
        }

        .img-caption {
            display: block;
            font-size: 12px;
            color: var(--muted);
            text-align: center;
            margin-top: 12px;
            line-height: 1.5;
        }

        /* 内容精选 */
        .resource-cell {
            margin-bottom: 24px;
        }

        .resource-card {
            display: block;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            height: 100%;
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .resource-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .resource-thumb {
            background: var(--primary-soft);
            overflow: hidden;
        }

        .resource-thumb img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: var(--primary-soft);
            transition: transform 0.35s ease;
        }

        .resource-card:hover .resource-thumb img {
            transform: scale(1.03);
        }

        .resource-tag {
            display: inline-block;
            font-size: 12px;
            color: var(--primary);
            background: var(--primary-soft);
            border-radius: 999px;
            padding: 4px 14px;
            margin: 18px 18px 0;
            font-weight: 500;
        }

        .resource-card h3 {
            font-size: 17px;
            color: var(--heading);
            padding: 12px 18px 0;
            line-height: 1.5;
            font-weight: 600;
        }

        .resource-card p {
            font-size: 14px;
            color: var(--muted);
            padding: 8px 18px 0;
            line-height: 1.65;
        }

        .resource-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--primary);
            padding: 12px 18px 20px;
            font-weight: 600;
        }

        .resource-link i {
            transition: transform var(--transition);
        }

        .resource-card:hover .resource-link i {
            transform: translateX(4px);
        }

        /* CTA */
        .cta-banner {
            background: var(--primary);
            padding: 60px 48px;
            position: relative;
            overflow: hidden;
        }

        .cta-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }

        .cta-text h3 {
            font-size: clamp(22px, 2.2vw, 30px);
            color: #fff;
            margin-bottom: 8px;
            font-weight: 700;
            line-height: 1.4;
        }

        .cta-text p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            max-width: 480px;
        }

        .cta-btn {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            padding: 14px 40px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            white-space: nowrap;
        }

        .cta-btn:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(255, 127, 80, 0.25);
        }

        .cta-btn:focus {
            outline: 2px solid #fff;
            outline-offset: 3px;
        }

        /* 页脚 */
        .site-footer {
            background: var(--primary);
            color: #fff;
            padding: 64px 48px 28px;
        }

        .site-footer .container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 48px;
        }

        .footer-brand .logo-row {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand .brand-name {
            color: #fff;
            font-size: 20px;
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 16px;
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
            color: #fff;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col a {
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: var(--accent);
        }

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
            margin-bottom: 12px;
        }

        .footer-contact-item i {
            width: 18px;
            text-align: center;
            color: var(--accent);
        }

        .footer-bottom {
            margin-top: 48px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.3);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.6);
            gap: 12px;
            flex-wrap: wrap;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .side-nav {
                display: none;
            }

            .mobile-header {
                display: flex;
            }

            .content-wrapper {
                margin-left: 0;
            }

            .page-banner {
                padding: 60px 28px;
                min-height: 260px;
            }

            .section {
                padding: 56px 28px;
            }

            .proof-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }

            .cta-banner {
                padding: 48px 28px;
            }

            .cta-inner {
                flex-direction: column;
                text-align: center;
            }

            .cta-text p {
                margin: 0 auto;
            }
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 48px 20px;
                min-height: auto;
                background-position: center right;
            }

            .page-banner .banner-overlay {
                background: linear-gradient(90deg, rgba(247, 245, 240, 0.96) 30%, rgba(247, 245, 240, 0.78));
            }

            .page-banner h1 {
                font-size: 28px;
                margin-bottom: 16px;
            }

            .page-banner p {
                font-size: 14px;
                line-height: 1.7;
            }

            .section {
                padding: 48px 20px;
            }

            .section-head {
                margin-bottom: 36px;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .section-head p {
                font-size: 14px;
            }

            .service-card {
                padding: 24px 20px;
            }

            .scenario-item {
                padding: 20px 16px;
            }

            .workflow-step {
                padding: 24px 20px;
            }

            .proof-text .data-points {
                gap: 28px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }

            .cta-btn {
                width: 100%;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .service-icon {
                width: 48px;
                height: 48px;
            }

            .service-icon i {
                font-size: 20px;
            }

            .scenario-index {
                font-size: 26px;
            }

            .resource-thumb img {
                height: 170px;
            }

            .brand-name {
                font-size: 16px;
            }

            .side-brand .brand-name {
                font-size: 18px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation: none !important;
                transition: none !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0E4C5C;
            --primary-dark: #093a46;
            --primary-light: #e8f2f1;
            --accent: #FF7F50;
            --accent-dark: #e86b3c;
            --bg-white: #FFFFFF;
            --bg-warm: #F7F5F0;
            --bg-soft: #F0F5F4;
            --text-dark: #1A2B33;
            --text-body: #3D4A52;
            --text-muted: #7A868C;
            --border: #E5E2D8;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-input: 8px;
            --radius-badge: 999px;
            --shadow-card: 0 4px 20px rgba(14, 76, 92, 0.06);
            --shadow-card-hover: 0 8px 32px rgba(14, 76, 92, 0.12);
            --transition-stand: 0.2s ease;
            --container: 1200px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-body);
            background: var(--bg-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-stand);
        }
        a:hover {
            color: var(--accent-dark);
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container-wide {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 32px;
        }
        .section {
            padding: 90px 0;
        }

        /* ===== 桌面侧栏 ===== */
        .desktop-sidebar {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: 240px;
            background: var(--bg-white);
            border-right: 1px solid var(--border);
            z-index: 110;
            display: flex;
            flex-direction: column;
            padding: 28px 20px;
            transition: transform var(--transition-stand);
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 34px;
            padding: 0 8px;
        }
        .brand-logo {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 17px;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-dark);
            letter-spacing: 0.5px;
        }
        .sidebar-nav ul {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: block;
            padding: 10px 12px;
            border-radius: 8px;
            color: #6A757B;
            font-size: 15px;
            font-weight: 500;
            border-left: 3px solid transparent;
            transition: all var(--transition-stand);
        }
        .sidebar-nav a:hover {
            background: var(--bg-warm);
            color: var(--primary);
        }
        .sidebar-nav .active a,
        .sidebar-nav a.active {
            background: rgba(14, 76, 92, 0.06);
            color: var(--primary);
            font-weight: 600;
            border-left-color: var(--primary);
        }
        .sidebar-nav .nav-divider {
            height: 1px;
            background: var(--border);
            margin: 16px 8px;
        }
        .sidebar-contact {
            margin-top: auto;
            border-top: 1px solid var(--border);
            padding-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .sidebar-contact div {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .sidebar-contact i {
            width: 18px;
            color: var(--primary);
            font-size: 14px;
            text-align: center;
        }

        /* ===== 移动端头 ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 120;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            align-items: center;
            justify-content: space-between;
            padding: 12px 20px;
            box-shadow: 0 2px 12px rgba(14, 76, 92, 0.05);
        }
        .mobile-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text-dark);
        }
        .menu-toggle {
            background: none;
            border: 1px solid var(--border);
            border-radius: 8px;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
            cursor: pointer;
            transition: all var(--transition-stand);
        }
        .menu-toggle:hover {
            background: var(--bg-warm);
        }
        .mobile-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: #fff;
            box-shadow: 0 12px 30px rgba(14, 76, 92, 0.12);
            border-top: 1px solid var(--border);
            padding: 12px 0;
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu ul {
            display: flex;
            flex-direction: column;
            padding: 0 20px;
        }
        .mobile-menu li {
            border-bottom: 1px solid #f2efe9;
        }
        .mobile-menu li:last-child {
            border-bottom: none;
        }
        .mobile-menu a {
            display: block;
            padding: 14px 4px;
            color: var(--text-body);
            font-size: 15px;
            font-weight: 500;
        }
        .mobile-menu a:hover {
            color: var(--primary);
        }
        .mobile-menu .active a {
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== 主内容 ===== */
        .main-content {
            margin-left: 240px;
            min-height: 100vh;
        }

        /* ===== Hero ===== */
        .cat-hero {
            background: var(--bg-warm);
            padding: 72px 0 64px;
            position: relative;
            overflow: hidden;
        }
        .cat-hero::before {
            content: "";
            position: absolute;
            right: -100px;
            top: -80px;
            width: 320px;
            height: 320px;
            background: rgba(14, 76, 92, 0.04);
            border-radius: 50%;
        }
        .cat-hero-inner {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 32px;
            display: flex;
            align-items: center;
            gap: 48px;
            position: relative;
        }
        .cat-hero-content {
            flex: 1.05;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(14, 76, 92, 0.1);
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-badge);
            padding: 6px 16px;
            margin-bottom: 22px;
        }
        .cat-hero h1 {
            font-size: 42px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-dark);
            margin: 0 0 16px;
            letter-spacing: 1px;
        }
        .cat-hero h1 .highlight {
            color: var(--primary);
        }
        .cat-hero .hero-lead {
            font-size: 17px;
            color: var(--text-muted);
            margin-bottom: 6px;
            max-width: 520px;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            gap: 18px;
            margin-top: 30px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-btn);
            padding: 12px 26px;
            font-size: 15px;
            font-weight: 600;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition-stand);
            line-height: 1.4;
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(255, 127, 80, 0.28);
        }
        .btn-ghost {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-ghost:hover {
            background: rgba(14, 76, 92, 0.06);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }
        .cat-hero-media {
            flex: 0.95;
        }
        .cat-hero-media img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            box-shadow: var(--shadow-card);
            background: var(--primary-light);
        }

        /* ===== Section通用 ===== */
        .section-head {
            text-align: center;
            max-width: 620px;
            margin: 0 auto 52px;
        }
        .section-tag {
            display: inline-block;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 10px;
        }
        .section-tag::before {
            content: "— ";
            color: var(--accent);
            font-weight: 700;
        }
        .section-head h2 {
            font-size: 32px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 14px;
        }
        .section-head p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== 卖点卡片 ===== */
        .features-section {
            background: var(--bg-white);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            padding: 30px 24px;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition-stand), transform var(--transition-stand);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 8px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 18px;
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .feature-card p {
            font-size: 14px;
            line-height: 1.65;
            color: var(--text-body);
            margin: 0;
        }

        /* ===== 主题卡片 ===== */
        .topics-section {
            background: var(--bg-soft);
        }
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .topic-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            padding: 30px 28px;
            transition: box-shadow var(--transition-stand);
        }
        .topic-card:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .topic-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 8px;
        }
        .topic-card p {
            font-size: 14px;
            color: var(--text-body);
            margin-bottom: 18px;
            line-height: 1.6;
        }
        .topic-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: gap var(--transition-stand);
        }
        .topic-link:hover {
            gap: 10px;
            color: var(--accent-dark);
        }
        .topic-card:nth-child(odd) {
            border-top: 3px solid var(--primary);
        }
        .topic-card:nth-child(even) {
            border-top: 3px solid var(--accent);
        }

        /* ===== 覆盖项目 ===== */
        .coverage-section {
            background: var(--bg-white);
        }
        .coverage-row {
            display: flex;
            align-items: center;
            gap: 56px;
        }
        .coverage-text {
            flex: 1;
        }
        .coverage-text .section-tag {
            margin-bottom: 6px;
        }
        .coverage-text h2 {
            font-size: 32px;
            color: var(--text-dark);
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .coverage-text>p {
            font-size: 16px;
            color: var(--text-body);
            margin-bottom: 22px;
            line-height: 1.8;
        }
        .coverage-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .coverage-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.6;
        }
        .coverage-list i {
            color: var(--primary);
            margin-top: 4px;
            font-size: 16px;
        }
        .coverage-media {
            flex: 1;
        }
        .coverage-media img {
            width: 100%;
            aspect-ratio: 5/4;
            object-fit: cover;
            box-shadow: var(--shadow-card);
        }

        /* ===== 流程 ===== */
        .process-section {
            background: var(--bg-warm);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .process-step {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            padding: 36px 28px;
            text-align: center;
            position: relative;
            transition: box-shadow var(--transition-stand);
        }
        .process-step:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .step-num {
            position: absolute;
            top: 20px;
            right: 24px;
            font-size: 44px;
            font-weight: 800;
            color: rgba(14, 76, 92, 0.1);
            line-height: 1;
        }
        .step-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin: 0 auto 20px;
        }
        .process-step h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.65;
            margin: 0;
        }

        /* ===== 数据证明 ===== */
        .proof-section {
            background: var(--primary);
            padding: 80px 0;
        }
        .proof-section .section-head h2 {
            color: #fff;
        }
        .proof-section .section-head p {
            color: rgba(255, 255, 255, 0.65);
        }
        .proof-section .section-tag {
            color: rgba(255, 255, 255, 0.75);
        }
        .proof-section .section-tag::before {
            color: var(--accent);
        }
        .proof-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .proof-item {
            text-align: center;
            padding: 24px 16px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-card);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .proof-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 8px;
        }
        .proof-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== CTA ===== */
        .contact-cta {
            background: var(--bg-white);
        }
        .cta-box {
            background: var(--bg-warm);
            border-radius: var(--radius-card);
            padding: 48px 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
        }
        .cta-box-content h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 6px;
        }
        .cta-box-content p {
            font-size: 16px;
            color: var(--text-muted);
            margin: 0;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
            margin-left: 240px;
        }
        .footer-grid {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 32px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.3);
        }
        .logo-row {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-brand .brand-logo {
            background: #fff;
            color: var(--primary);
        }
        .footer-brand .brand-name {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color var(--transition-stand);
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-contact-item i {
            width: 18px;
            color: var(--accent);
            text-align: center;
        }
        .footer-bottom {
            max-width: var(--container);
            margin: 0 auto;
            padding: 20px 32px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.55);
        }

        /* ===== 浮动按钮 ===== */
        .floating-cta {
            position: fixed;
            right: 32px;
            bottom: 32px;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            border: none;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            box-shadow: 0 6px 20px rgba(14, 76, 92, 0.3);
            transition: opacity var(--transition-stand), transform var(--transition-stand), background var(--transition-stand);
            opacity: 0;
            visibility: hidden;
            z-index: 90;
        }
        .floating-cta.visible {
            opacity: 1;
            visibility: visible;
        }
        .floating-cta:hover {
            background: var(--accent);
            transform: translateY(-2px);
        }

        /* ===== 动画 ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .section {
            animation: fadeInUp 0.5s ease both;
        }
        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }
            .section {
                animation: none;
            }
            .floating-cta,
            .btn,
            .process-step,
            .feature-card,
            .topic-card {
                transition: none;
            }
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .desktop-sidebar {
                display: none;
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .mobile-header .menu-toggle {
                display: flex;
            }
            .site-footer {
                margin-left: 0;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cat-hero-inner {
                flex-direction: column;
                gap: 32px;
            }
            .cat-hero {
                padding: 52px 0 48px;
            }
            .cat-hero-content {
                text-align: center;
            }
            .hero-actions {
                justify-content: center;
            }
            .cat-hero .hero-lead {
                margin-left: auto;
                margin-right: auto;
            }
            .coverage-row {
                flex-direction: column;
                gap: 32px;
            }
            .process-steps {
                grid-template-columns: 1fr;
                max-width: 520px;
                margin: 0 auto;
            }
            .proof-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-box {
                flex-direction: column;
                text-align: center;
                padding: 36px 28px;
            }
        }
        @media (max-width: 768px) {
            .container-wide {
                padding: 0 20px;
            }
            .section {
                padding: 56px 0;
            }
            .cat-hero h1 {
                font-size: 32px;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .section-head p {
                font-size: 15px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .topics-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .floating-cta {
                right: 20px;
                bottom: 20px;
                width: 48px;
                height: 48px;
                font-size: 12px;
            }
            .hero-actions {
                gap: 12px;
            }
            .proof-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        @media (max-width: 520px) {
            .cat-hero h1 {
                font-size: 28px;
                line-height: 1.35;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .btn-ghost {
                margin-top: 4px;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .topic-card {
                padding: 24px 20px;
            }
            .cta-box-content h2 {
                font-size: 22px;
            }
        }