/* roulang page: index */
:root {
  --primary: #4F46E5;
  --primary-dark: #4338CA;
  --primary-light: #EEF2FF;
  --accent: #F59E0B;
  --accent-light: #FEF3C7;
  --dark: #0F172A;
  --dark-soft: #1E293B;
  --bg: #F8FAFC;
  --bg-white: #FFFFFF;
  --text: #1E293B;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  --border: #E2E8F0;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 100px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 44px rgba(15, 23, 42, 0.12);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container: 1200px;
  --header-h: 76px;
  --section-gap: 96px;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
input, textarea {
  font-family: inherit;
  outline: none;
}
ul, ol {
  list-style: none;
}
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  transition: all 0.25s ease;
  white-space: nowrap;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
}
.btn-primary:focus-visible {
  outline: 3px solid rgba(79, 70, 229, 0.35);
  outline-offset: 2px;
}
.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  transform: translateY(-2px);
}
.btn-outline:active {
  transform: translateY(0);
}
.btn-outline:focus-visible {
  outline: 3px solid rgba(255, 255, 255, 0.35);
  outline-offset: 2px;
}
.btn-light {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}
.btn-light:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}
.btn-light:active {
  transform: translateY(0);
}
.btn-accent {
  background: var(--accent);
  color: var(--dark);
  box-shadow: 0 4px 18px rgba(245, 158, 11, 0.4);
}
.btn-accent:hover {
  background: #F59E0B;
  filter: brightness(1.05);
  transform: translateY(-2px);
}
.btn-accent:active {
  transform: translateY(0);
}
.btn-large {
  padding: 14px 38px;
  font-size: 16px;
}
@media (max-width: 520px) {
  .btn {
    padding: 11px 22px;
    font-size: 14px;
  }
}

/* ===== Section tag / badge ===== */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}
.section-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  display: inline-block;
}
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
}
.section-head h2 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
}
@media (max-width: 768px) {
  .section-head h2 {
    font-size: 27px;
  }
  .section-head p {
    font-size: 15px;
  }
  .section-head {
    margin-bottom: 36px;
  }
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  height: var(--header-h);
}
.brand {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 2px;
  font-size: 26px;
  font-weight: 900;
  color: var(--dark);
  letter-spacing: -0.5px;
  line-height: 1;
}
.brand span {
  color: var(--primary);
}
.brand-badge {
  font-size: 10px;
  font-weight: 700;
  background: var(--accent);
  color: #fff;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  margin-left: 6px;
  vertical-align: middle;
  letter-spacing: 0.5px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-pill);
  transition: all 0.22s ease;
  position: relative;
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
}
.header-search {
  flex: 1;
  display: flex;
  align-items: center;
  max-width: 460px;
  margin-left: auto;
  position: relative;
}
.header-search .search-wrap {
  width: 100%;
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 0 8px 0 18px;
  transition: all 0.25s ease;
  height: 44px;
}
.header-search .search-wrap:focus-within {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.12);
}
.icon-search {
  width: 18px;
  height: 18px;
  color: var(--text-light);
  flex-shrink: 0;
  transition: color 0.2s;
}
.header-search .search-wrap:focus-within .icon-search {
  color: var(--primary);
}
.header-search input[type="search"] {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--text);
  min-width: 0;
}
.header-search input[type="search"]::placeholder {
  color: var(--text-light);
}
.header-search input[type="search"]::-webkit-search-cancel-button {
  display: none;
}
.search-btn {
  flex-shrink: 0;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-pill);
  padding: 7px 18px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.22s ease;
}
.search-btn:hover {
  background: var(--primary-dark);
}
.search-btn:focus-visible {
  outline: 3px solid rgba(79, 70, 229, 0.35);
  outline-offset: 2px;
}
.menu-toggle {
  display: none;
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: var(--bg);
  border: 1px solid var(--border);
  transition: all 0.25s;
}
.menu-toggle:hover {
  background: var(--primary-light);
  border-color: var(--primary);
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
@media (max-width: 1024px) {
  :root {
    --header-h: 70px;
  }
  .header-inner {
    gap: 14px;
  }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
    transform: translateX(100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.35s ease;
    gap: 4px;
    z-index: 999;
  }
  .main-nav.nav-open {
    transform: translateX(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-link {
    padding: 13px 16px;
    font-size: 16px;
    border-radius: var(--radius-md);
  }
  .nav-link.active::after {
    display: none;
  }
  .menu-toggle {
    display: inline-flex;
  }
  .header-search {
    max-width: none;
    flex: 1;
  }
}
@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding-top: 14px;
    padding-bottom: 14px;
    gap: 12px;
  }
  .brand {
    margin-right: 0;
  }
  .header-search {
    order: 3;
    width: 100%;
    flex-basis: 100%;
    max-width: none;
  }
  .menu-toggle {
    margin-left: auto;
  }
  .main-nav {
    top: 116px;
  }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  background: var(--dark);
  background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 27, 75, 0.82)), url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center center;
  color: #fff;
  padding: 110px 0 96px;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to top, var(--bg), transparent);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(8px);
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 26px;
}
.hero-badge i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #34D399;
  display: inline-block;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.hero-title {
  font-size: 52px;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.hero-title .highlight {
  background: linear-gradient(90deg, #C7D2FE, #FDE68A);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 17px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.72);
  max-width: 600px;
  margin: 0 auto 36px;
}
.hero-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
  padding: 30px 32px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
}
.hero-stat {
  text-align: center;
  padding: 8px 0;
}
.hero-stat strong {
  display: block;
  font-size: 30px;
  font-weight: 800;
  color: #FDE68A;
  line-height: 1.3;
}
.hero-stat span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
}
@media (max-width: 1024px) {
  .hero {
    padding: 90px 0 80px;
  }
  .hero-title {
    font-size: 42px;
  }
}
@media (max-width: 768px) {
  .hero-title {
    font-size: 34px;
  }
  .hero-sub {
    font-size: 15px;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    padding: 22px 18px;
    gap: 16px;
  }
  .hero-stat strong {
    font-size: 25px;
  }
}
@media (max-width: 520px) {
  .hero {
    padding: 68px 0 64px;
  }
  .hero-title {
    font-size: 28px;
  }
  .hero-buttons {
    gap: 10px;
  }
  .hero-buttons .btn {
    width: 100%;
  }
}

/* ===== About section ===== */
.about-section {
  padding: var(--section-gap) 0;
  background: var(--bg);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-media {
  position: relative;
}
.about-img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  border: 4px solid #fff;
}
.about-float-card {
  position: absolute;
  bottom: -22px;
  right: -18px;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 18px 26px;
  text-align: center;
  border: 1px solid var(--border);
}
.about-float-card strong {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}
.about-float-card span {
  font-size: 13px;
  color: var(--text-muted);
}
.about-content h2 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 18px;
  color: var(--text);
}
.about-content > p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 24px;
}
.about-list {
  margin-bottom: 32px;
  display: grid;
  gap: 12px;
}
.about-list li {
  position: relative;
  padding-left: 34px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.6;
}
.about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-light);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234F46E5' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
  background-size: 10px;
  background-position: center;
  background-repeat: no-repeat;
}
@media (max-width: 968px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .about-media {
    order: 1;
  }
  .about-content {
    order: 2;
  }
  .about-float-card {
    right: 12px;
    bottom: -18px;
  }
}
@media (max-width: 520px) {
  .about-section {
    padding: 60px 0;
  }
  .about-float-card {
    right: 6px;
    padding: 12px 18px;
  }
  .about-float-card strong {
    font-size: 22px;
  }
  .about-content h2 {
    font-size: 27px;
  }
}

/* ===== Features section ===== */
.features-section {
  padding: var(--section-gap) 0;
  background: #fff;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity 0.3s;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  background: #fff;
  border-color: transparent;
}
.feature-card:hover::before {
  opacity: 1;
}
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  transition: all 0.3s;
}
.feature-card:hover .feature-icon {
  background: var(--primary);
  transform: scale(1.05);
}
.feature-icon svg {
  width: 26px;
  height: 26px;
  color: var(--primary);
  transition: color 0.3s;
}
.feature-card:hover .feature-icon svg {
  color: #fff;
}
.feature-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}
.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
}
@media (max-width: 968px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
  .feature-card {
    padding: 28px 24px;
  }
}

/* ===== Metrics section ===== */
.metrics-section {
  padding: var(--section-gap) 0;
  background: var(--dark);
  background-image: linear-gradient(120deg, rgba(15, 23, 42, 0.96), rgba(49, 46, 129, 0.88)), url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  color: #fff;
}
.metrics-section .section-head h2 {
  color: #fff;
}
.metrics-section .section-head p {
  color: rgba(255, 255, 255, 0.65);
}
.metrics-section .section-tag {
  background: rgba(255, 255, 255, 0.12);
  color: #E0E7FF;
}
.metrics-section .section-tag::before {
  background: #FDE68A;
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.metric-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: all 0.3s ease;
}
.metric-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-4px);
}
.metric-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 10px;
}
.metric-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
}
.metric-value {
  font-size: 26px;
  font-weight: 800;
  color: #FDE68A;
  letter-spacing: -0.5px;
}
.metric-bar {
  height: 8px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin-bottom: 14px;
}
.metric-bar i {
  display: block;
  height: 100%;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, #818CF8, #F59E0B);
  transition: width 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.metric-card p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.5;
}
@media (max-width: 968px) {
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
}
@media (max-width: 520px) {
  .metrics-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .metric-card {
    padding: 22px 20px;
  }
}

/* ===== Category section ===== */
.category-section {
  padding: var(--section-gap) 0;
  background: var(--bg);
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all 0.35s ease;
  display: block;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.category-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.category-card:hover img {
  transform: scale(1.05);
}
.category-info {
  padding: 28px 28px 32px;
}
.category-info h3 {
  font-size: 21px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}
.category-info p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 18px;
}
.category-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap 0.25s;
}
.category-card:hover .category-more {
  gap: 12px;
}
.category-card:hover .category-more {
  color: var(--primary-dark);
}
.category-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(15, 23, 42, 0.72);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  z-index: 2;
}
@media (max-width: 900px) {
  .category-grid {
    grid-template-columns: 1fr;
    gap: 22px;
  }
}

/* ===== News section ===== */
.news-section {
  padding: var(--section-gap) 0;
  background: #fff;
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.news-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
}
.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  background: #fff;
  border-color: transparent;
}
.news-card-link {
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: 28px 26px;
}
.news-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}
.news-cat {
  display: inline-flex;
  align-items: center;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
}
.news-date {
  font-size: 12px;
  color: var(--text-light);
  flex-shrink: 0;
}
.news-title {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--text);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s;
}
.news-card-link:hover .news-title {
  color: var(--primary);
}
.news-excerpt {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-more {
  margin-top: auto;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.25s;
}
.news-card-link:hover .news-more {
  gap: 10px;
}
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 24px;
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  color: var(--text-muted);
  font-size: 16px;
}
@media (max-width: 968px) {
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}
@media (max-width: 640px) {
  .news-grid {
    grid-template-columns: 1fr;
  }
  .news-section {
    padding: 60px 0;
  }
}

/* ===== Process section ===== */
.process-section {
  padding: var(--section-gap) 0;
  background: var(--bg);
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  counter-reset: step;
}
.process-step {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 26px 30px;
  text-align: center;
  transition: all 0.3s ease;
}
.process-step:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 18px;
  transition: all 0.3s;
}
.process-step:hover .step-num {
  background: var(--primary);
  color: #fff;
}
.process-step h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}
.process-step p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}
.process-step::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -18px;
  width: 14px;
  height: 14px;
  border-top: 2px solid var(--border);
  border-right: 2px solid var(--border);
  transform: translateY(-50%) rotate(45deg);
  z-index: 2;
}
.process-step:last-child::after {
  display: none;
}
@media (max-width: 968px) {
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .process-step::after {
    display: none;
  }
}
@media (max-width: 520px) {
  .process-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== FAQ section ===== */
.faq-section {
  padding: var(--section-gap) 0;
  background: #fff;
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}
.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
}
.faq-item:hover {
  border-color: var(--primary);
}
.faq-item[open] {
  background: #fff;
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: color 0.2s;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary:hover {
  color: var(--primary);
}
.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  font-weight: 700;
  transition: all 0.3s ease;
}
.faq-item[open] summary::after {
  content: "−";
  transform: rotate(180deg);
  background: var(--primary);
  color: #fff;
}
.faq-answer {
  padding: 0 24px 22px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.85;
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin: 0 24px 22px;
  padding-left: 0;
  padding-right: 0;
  padding-bottom: 0;
  margin-left: 24px;
  margin-right: 24px;
}
@media (max-width: 640px) {
  .faq-item summary {
    padding: 16px 18px;
    font-size: 15px;
  }
  .faq-answer {
    margin: 0 18px 18px;
    font-size: 14px;
  }
}

/* ===== CTA section ===== */
.cta-section {
  position: relative;
  padding: 90px 0;
  background-image: linear-gradient(120deg, rgba(79, 70, 229, 0.9), rgba(15, 23, 42, 0.92)), url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  color: #fff;
  text-align: center;
}
.cta-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.cta-content p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 36px;
  line-height: 1.8;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
@media (max-width: 640px) {
  .cta-section {
    padding: 68px 0;
  }
  .cta-content h2 {
    font-size: 28px;
  }
  .cta-content p {
    font-size: 15px;
  }
  .cta-buttons .btn {
    width: 100%;
  }
}

/* ===== Footer ===== */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 70px 0 0;
}
.footer-main {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 52px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand {
  font-size: 28px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.5px;
  display: inline-flex;
  align-items: center;
  gap: 2px;
  margin-bottom: 16px;
}
.footer-brand span {
  color: #818CF8;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 24px;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}
.footer-col ul {
  display: grid;
  gap: 10px;
}
.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  transition: all 0.22s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-col ul a::before {
  content: "›";
  font-size: 16px;
  color: var(--accent);
  transition: transform 0.22s;
}
.footer-col ul a:hover {
  color: #fff;
  transform: translateX(4px);
}
.footer-contact li {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.7;
}
.footer-contact li svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 4px;
  color: #818CF8;
}
.footer-contact a:hover {
  color: #fff;
}
.footer-bottom {
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}
.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.2s;
}
.footer-bottom a:hover {
  color: #fff;
}
@media (max-width: 900px) {
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
  .footer-col:first-child {
    grid-column: 1 / -1;
  }
}
@media (max-width: 520px) {
  .site-footer {
    padding: 52px 0 0;
  }
  .footer-main {
    grid-template-columns: 1fr;
    gap: 30px;
    padding-bottom: 36px;
  }
  .footer-col:first-child {
    grid-column: auto;
  }
}

/* ===== Misc ===== */
.section-divider {
  border: none;
  height: 1px;
  background: var(--border);
  margin: 0;
}
:focus-visible {
  outline: 3px solid rgba(79, 70, 229, 0.35);
  outline-offset: 2px;
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --navy-900: #0b1526;
  --navy-800: #101e36;
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --bg: #f6f8fc;
  --card: #ffffff;
  --text: #1e293b;
  --text-soft: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --radius-lg: 20px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow: 0 10px 32px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 64px rgba(15, 23, 42, 0.14);
  --container: 1200px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; border: 0; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 1rem; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  transition: all var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn i { font-size: 14px; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.45);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}
.btn-light {
  background: #fff;
  color: var(--navy-900);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}
.btn-light:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }
.btn-accent {
  background: var(--accent);
  color: var(--navy-900);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}
.btn-accent:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 12px rgba(15, 23, 42, 0.04);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 72px;
  flex-wrap: wrap;
}
.brand-logo {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--navy-900);
  display: flex;
  align-items: baseline;
  line-height: 1;
  flex-shrink: 0;
}
.brand-logo span {
  color: var(--primary);
  font-size: 18px;
  margin-left: 2px;
  font-weight: 700;
}
.header-search {
  flex: 1;
  max-width: 420px;
  min-width: 200px;
}
.header-search-form {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 8px 8px 18px;
  transition: all var(--transition);
}
.header-search-form:focus-within {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}
.header-search-form i {
  color: var(--text-light);
  font-size: 14px;
  margin-right: 10px;
}
.header-search-form input {
  border: none;
  outline: none;
  background: transparent;
  flex: 1;
  font-size: 14px;
  color: var(--text);
  min-width: 0;
}
.header-search-form input::placeholder { color: var(--text-light); }
.header-search-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  transition: all var(--transition);
}
.header-search-btn:hover { background: var(--primary-dark); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.nav-link {
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: 999px;
  transition: all var(--transition);
  position: relative;
}
.nav-link:hover { color: var(--primary); background: rgba(37, 99, 235, 0.06); }
.nav-link.active {
  color: var(--primary);
  background: rgba(37, 99, 235, 0.1);
  font-weight: 600;
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--bg);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-left: auto;
  transition: all var(--transition);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ===== 分类 Banner ===== */
.category-banner {
  position: relative;
  padding: 110px 0 90px;
  background:
    linear-gradient(115deg, rgba(11, 21, 38, 0.92) 0%, rgba(16, 30, 54, 0.78) 50%, rgba(37, 99, 235, 0.55) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.category-banner::after {
  content: '';
  position: absolute;
  bottom: -60px;
  right: -40px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.28), transparent 70%);
  pointer-events: none;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.breadcrumb a { color: rgba(255, 255, 255, 0.65); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb i { font-size: 11px; }
.banner-content { position: relative; z-index: 2; max-width: 720px; }
.banner-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
  backdrop-filter: blur(8px);
}
.category-banner h1 {
  font-size: 46px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 18px;
}
.category-banner h1 .highlight {
  color: var(--accent);
}
.category-banner p {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 34px;
}
.banner-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ===== 通用板块 ===== */
.section { padding: 96px 0; }
.section-light { background: var(--bg); }
.section-white { background: #fff; }
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--primary);
  text-transform: uppercase;
  background: rgba(37, 99, 235, 0.08);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.section-title {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.5px;
  color: var(--navy-900);
  margin-bottom: 14px;
}
.section-subtitle {
  font-size: 16px;
  color: var(--text-soft);
  line-height: 1.8;
}

/* ===== 产品体系卡片 ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.25);
}
.product-card-img {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.product-card:hover .product-card-img img { transform: scale(1.06); }
.product-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11, 21, 38, 0.4), transparent 60%);
}
.product-card-icon {
  position: absolute;
  left: 20px;
  bottom: -20px;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
  z-index: 2;
}
.product-card-body {
  padding: 36px 24px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-card-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--navy-900);
  margin-bottom: 10px;
}
.product-card-body p {
  font-size: 14.5px;
  color: var(--text-soft);
  line-height: 1.75;
  flex: 1;
  margin-bottom: 16px;
}
.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--primary);
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.12);
  padding: 4px 14px;
  border-radius: 999px;
  transition: all var(--transition);
}
.tag:hover { background: var(--primary); color: #fff; }

/* ===== 核心功能 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition);
}
.feature-card:hover {
  background: #fff;
  box-shadow: var(--shadow);
  transform: translateY(-6px);
  border-color: transparent;
}
.feature-card:hover::before { opacity: 1; }
.feature-card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--card);
  color: var(--primary);
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.feature-card:hover .feature-card-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(-6deg) scale(1.05);
}
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--navy-900); }
.feature-card p { font-size: 14.5px; color: var(--text-soft); line-height: 1.75; }

/* ===== 数据指标（深色沉浸） ===== */
.stats-section {
  background:
    radial-gradient(ellipse at 80% 20%, rgba(37, 99, 235, 0.32), transparent 55%),
    radial-gradient(ellipse at 15% 90%, rgba(245, 158, 11, 0.2), transparent 50%),
    var(--navy-900);
  color: #fff;
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}
.stats-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}
.stats-header .section-title { color: #fff; }
.stats-header .section-subtitle { color: rgba(255, 255, 255, 0.6); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 34px 24px;
  text-align: center;
  backdrop-filter: blur(6px);
  transition: all var(--transition);
}
.stat-item:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-4px);
}
.stat-value {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: -1px;
  background: linear-gradient(135deg, #fff 0%, var(--accent) 120%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
  line-height: 1.1;
}
.stat-label { font-size: 15px; color: rgba(255, 255, 255, 0.65); }

/* ===== 应用场景 ===== */
.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.scenario-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.scenario-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}
.scenario-media::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: inherit;
  pointer-events: none;
}
.scenario-float {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: rgba(11, 21, 38, 0.82);
  backdrop-filter: blur(10px);
  color: #fff;
  padding: 14px 20px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}
.scenario-float i { color: var(--accent); font-size: 18px; }
.scenario-float strong { display: block; font-size: 15px; }
.scenario-float span { font-size: 12.5px; color: rgba(255, 255, 255, 0.6); }
.scenario-content .section-eyebrow { margin-bottom: 16px; }
.scenario-content .section-title { margin-bottom: 16px; }
.scenario-content > p { font-size: 15.5px; color: var(--text-soft); margin-bottom: 28px; line-height: 1.8; }
.scenario-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  list-style: none;
}
.scenario-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  transition: all var(--transition);
}
.scenario-list li:hover {
  box-shadow: var(--shadow-sm);
  border-color: rgba(37, 99, 235, 0.25);
  transform: translateX(4px);
}
.scenario-list li i {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 10px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}
.scenario-list li h4 { font-size: 15.5px; font-weight: 700; color: var(--navy-900); margin-bottom: 3px; }
.scenario-list li p { font-size: 13.5px; color: var(--text-soft); line-height: 1.6; }

/* ===== 服务方案 ===== */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: center;
}
.plan-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  transition: all var(--transition);
  position: relative;
}
.plan-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.plan-card.featured {
  background: var(--navy-900);
  border-color: var(--navy-900);
  color: #fff;
  padding-top: 48px;
  padding-bottom: 48px;
  box-shadow: var(--shadow-lg);
  transform: scale(1.03);
  z-index: 2;
}
.plan-card.featured:hover { transform: scale(1.03) translateY(-6px); }
.plan-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--navy-900);
  font-size: 12.5px;
  font-weight: 700;
  padding: 5px 18px;
  border-radius: 999px;
  white-space: nowrap;
  box-shadow: 0 6px 16px rgba(245, 158, 11, 0.35);
}
.plan-name { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.plan-price { display: flex; align-items: baseline; gap: 6px; margin-bottom: 4px; }
.plan-price .num { font-size: 40px; font-weight: 800; letter-spacing: -1px; line-height: 1; }
.plan-price .unit { font-size: 15px; color: var(--text-soft); }
.plan-card.featured .plan-price .unit { color: rgba(255, 255, 255, 0.55); }
.plan-desc { font-size: 14px; color: var(--text-soft); margin-bottom: 24px; line-height: 1.7; }
.plan-card.featured .plan-desc { color: rgba(255, 255, 255, 0.6); }
.plan-features { list-style: none; margin-bottom: 28px; display: grid; gap: 10px; }
.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
}
.plan-features li i { color: var(--primary); font-size: 13px; width: 18px; }
.plan-card.featured .plan-features li i { color: var(--accent); }
.plan-card .btn { width: 100%; }
.plan-card.featured .btn-light:hover { background: var(--accent); border-color: var(--accent); }

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-item.open { box-shadow: var(--shadow-sm); border-color: rgba(37, 99, 235, 0.3); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 26px;
  font-size: 16px;
  font-weight: 600;
  color: var(--navy-900);
  text-align: left;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-icon {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  transition: all 0.3s ease;
}
.faq-item.open .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-answer p {
  padding: 0 26px 22px;
  font-size: 14.5px;
  color: var(--text-soft);
  line-height: 1.85;
  border-top: 1px solid var(--bg);
  margin-top: -2px;
  padding-top: 18px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 0;
}
.cta-box {
  position: relative;
  background:
    linear-gradient(120deg, rgba(11, 21, 38, 0.94), rgba(37, 99, 235, 0.82)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border-radius: 28px;
  padding: 72px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  overflow: hidden;
  flex-wrap: wrap;
  box-shadow: var(--shadow-lg);
}
.cta-box::after {
  content: '';
  position: absolute;
  top: -80px;
  right: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.35), transparent 70%);
}
.cta-content { position: relative; z-index: 2; max-width: 580px; }
.cta-content h2 { color: #fff; font-size: 30px; font-weight: 800; letter-spacing: -0.5px; margin-bottom: 12px; }
.cta-content p { color: rgba(255, 255, 255, 0.75); font-size: 15.5px; line-height: 1.8; }
.cta-actions { position: relative; z-index: 2; display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer {
  background: var(--navy-900);
  color: rgba(255, 255, 255, 0.65);
  padding: 70px 0 0;
  margin-top: 96px;
}
.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand {
  font-size: 26px;
  font-weight: 800;
  color: #fff;
  display: inline-flex;
  align-items: baseline;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}
.footer-brand span { color: var(--accent); font-size: 18px; }
.footer-desc {
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.55);
  max-width: 360px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}
.footer-col ul { list-style: none; display: grid; gap: 10px; }
.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  transition: all var(--transition);
}
.footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
}
.footer-contact svg {
  width: 16px;
  height: 16px;
  color: var(--accent);
  flex-shrink: 0;
}
.footer-bottom {
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.38);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.45); transition: color var(--transition); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-header { flex-direction: column; align-items: flex-start; gap: 16px; }
  .category-banner h1 { font-size: 38px; }
  .cta-box { padding: 56px 40px; }
}

@media (max-width: 900px) {
  .header-inner { gap: 16px; }
  .header-search { order: 3; max-width: 100%; flex-basis: 100%; }
  .main-nav { margin-left: 0; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-title { font-size: 28px; }
  .header-inner { min-height: 64px; flex-wrap: nowrap; }
  .header-search { display: none; }
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 8px;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 99;
  }
  .main-nav.open { transform: translateY(0); }
  .nav-link {
    padding: 12px 16px;
    font-size: 16px;
    border-radius: 12px;
  }
  .category-banner { padding: 80px 0 64px; }
  .category-banner h1 { font-size: 32px; }
  .category-banner p { font-size: 15.5px; }
  .product-grid,
  .feature-grid,
  .scenario-grid,
  .plans-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { gap: 36px; }
  .plan-card.featured { transform: none; }
  .plan-card.featured:hover { transform: translateY(-6px); }
  .cta-box { padding: 40px 28px; flex-direction: column; align-items: flex-start; }
  .footer-main { grid-template-columns: 1fr; gap: 36px; }
  .faq-question { font-size: 15px; padding: 18px 20px; }
  .faq-answer p { padding: 0 20px 18px; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .brand-logo { font-size: 22px; }
  .brand-logo span { font-size: 15px; }
  .category-banner { padding: 64px 0 52px; }
  .category-banner h1 { font-size: 27px; }
  .banner-actions .btn { width: 100%; }
  .section-title { font-size: 25px; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-value { font-size: 36px; }
  .scenario-float { left: 12px; bottom: 12px; padding: 10px 14px; font-size: 12px; }
  .btn { padding: 11px 22px; font-size: 14px; }
  .cta-content h2 { font-size: 24px; }
  .cta-actions .btn { width: 100%; }
  .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
}

/* roulang page: article */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --primary-soft: #eff6ff;
  --accent: #06b6d4;
  --accent-soft: #cffafe;
  --dark: #0f172a;
  --text: #334155;
  --muted: #64748b;
  --light: #94a3b8;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-deep: #0b1120;
  --border: #e2e8f0;
  --radius-sm: 10px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, .04);
  --shadow: 0 4px 20px rgba(15, 23, 42, .06);
  --shadow-lg: 0 18px 44px rgba(15, 23, 42, .12);
  --shadow-primary: 0 10px 30px rgba(37, 99, 235, .22);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --header-h: 72px;
  --space-section: 88px;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 14px;
  color: var(--dark);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.02em;
}
p {
  margin: 0 0 16px;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease;
}
button, input, select, textarea {
  font: inherit;
  color: inherit;
}
button {
  cursor: pointer;
  border: none;
  background: none;
}
ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}
main {
  overflow: hidden;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  transition: all .22s ease;
  border: 2px solid transparent;
}
.btn:focus-visible,
.nav-toggle:focus-visible,
.search-form input:focus-visible,
.nav-link:focus-visible {
  outline: 3px solid rgba(37, 99, 235, .35);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(37, 99, 235, .3);
}
.btn-light {
  background: #fff;
  color: var(--dark);
}
.btn-light:hover {
  background: var(--primary-soft);
  transform: translateY(-2px);
}
.btn-outline-light {
  border-color: rgba(255, 255, 255, .55);
  color: #fff;
  background: rgba(255, 255, 255, .08);
  backdrop-filter: blur(4px);
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, .16);
  border-color: #fff;
  transform: translateY(-2px);
}

/* ===== Badge / Tag ===== */
.badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 700;
  background: var(--primary);
  color: #fff;
  letter-spacing: .02em;
}
.badge-soft {
  background: var(--primary-soft);
  color: var(--primary);
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  background: var(--bg-alt);
  color: var(--tail: #475569);
  border: 1px solid var(--border);
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: var(--header-h);
}
.brand {
  flex-shrink: 0;
  display: inline-flex;
  align-items: baseline;
  font-size: 27px;
  font-weight: 900;
  color: var(--dark);
  letter-spacing: -0.03em;
  line-height: 1;
}
.brand span {
  color: var(--primary);
  margin-left: 1px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  transition: all .2s ease;
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-soft);
}
.nav-link.active {
  color: #fff;
  background: var(--primary);
  box-shadow: 0 6px 16px rgba(37, 99, 235, .24);
}
.header-tools {
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-form {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 260px;
  height: 42px;
  padding: 0 14px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  transition: all .24s ease;
}
.search-form:focus-within {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, .1);
}
.search-icon {
  width: 17px;
  height: 17px;
  color: var(--muted);
  flex-shrink: 0;
}
.search-form input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  outline: none;
  font-size: 14px;
  color: var(--dark);
}
.search-form input::placeholder {
  color: var(--light);
}
.search-form input::-webkit-search-cancel-button {
  -webkit-appearance: none;
}
.search-form-mobile {
  display: none;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  transition: all .2s ease;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: all .3s ease;
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Breadcrumb ===== */
.breadcrumb-section {
  padding: 18px 0 0;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}
.breadcrumb a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  color: var(--muted);
  transition: color .2s;
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb .sep {
  color: var(--light);
}
.breadcrumb .current {
  color: var(--text);
  font-weight: 600;
}

/* ===== Article Section ===== */
.article-section {
  padding: 28px 0 56px;
}
.article-card {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow: hidden;
}
.article-header {
  padding: 40px 48px 0;
}
.article-meta-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.article-date {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
}
.article-date::before {
  content: "\f017";
  font-family: "Font Awesome 6 Free";
  font-weight: 400;
  color: var(--primary);
}
.article-title {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 16px;
  line-height: 1.25;
}
.article-excerpt {
  font-size: 17px;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 28px;
  border-left: 4px solid var(--primary);
  padding-left: 18px;
  background: var(--primary-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 14px 18px;
}
.article-cover {
  margin: 0 -48px;
}
.article-cover img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
}
.article-content {
  padding: 40px 48px 24px;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--text);
}
.article-content > *:last-child {
  margin-bottom: 0;
}
.article-content p {
  margin-bottom: 22px;
}
.article-content h2 {
  font-size: 24px;
  margin-top: 36px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.article-content h3 {
  font-size: 20px;
  margin-top: 28px;
  margin-bottom: 10px;
}
.article-content img {
  border-radius: var(--radius);
  margin: 24px 0;
  box-shadow: var(--shadow);
}
.article-content ul,
.article-content ol {
  margin: 0 0 22px;
  padding-left: 22px;
}
.article-content ul {
  list-style: disc;
}
.article-content ol {
  list-style: decimal;
}
.article-content li {
  margin-bottom: 8px;
}
.article-content blockquote {
  margin: 24px 0;
  padding: 18px 22px;
  background: var(--primary-soft);
  border-radius: var(--radius);
  border-left: 4px solid var(--primary);
  color: var(--dark);
  font-weight: 500;
}
.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover {
  color: var(--primary-dark);
}
.article-content code {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 14px;
  font-family: "SFMono-Regular", Consolas, monospace;
  color: var(--primary-dark);
}
.article-content pre {
  background: var(--bg-deep);
  color: #e2e8f0;
  padding: 20px 24px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 24px 0;
  line-height: 1.7;
  font-size: 14px;
}
.article-content pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}
.article-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 16px 48px 40px;
  padding: 20px 0 0;
  border-top: 1px solid var(--border);
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.share-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.share-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  margin-right: 4px;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 15px;
  transition: all .2s ease;
}
.share-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
}
.share-btn.copied {
  background: #10b981;
  color: #fff;
  border-color: #10b981;
}

/* ===== Not Found ===== */
.not-found-section {
  padding: 60px 0 88px;
}
.not-found-card {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 60px 40px;
}
.not-found-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 88px;
  height: 88px;
  border-radius: 50%;
  font-size: 30px;
  font-weight: 900;
  color: var(--primary);
  background: var(--primary-soft);
  margin-bottom: 24px;
}
.not-found-card h1 {
  font-size: 30px;
  margin-bottom: 10px;
}
.not-found-card p {
  color: var(--muted);
  margin-bottom: 28px;
}

/* ===== Related Section ===== */
.related-section {
  padding: var(--space-section) 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 44px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(26px, 3vw, 34px);
  margin-bottom: 10px;
}
.section-sub {
  color: var(--muted);
  font-size: 16px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all .3s ease;
}
.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, .35);
}
.related-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform .5s ease;
}
.related-card:hover img {
  transform: scale(1.05);
}
.related-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px;
  flex: 1;
}
.related-body h3 {
  font-size: 18px;
  margin: 0;
}
.related-body p {
  font-size: 14px;
  color: var(--muted);
  flex: 1;
  margin: 0;
}
.link-arrow {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s ease;
}
.related-card:hover .link-arrow {
  gap: 10px;
}

/* ===== CTA Banner ===== */
.cta-banner {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 96px 0;
  color: #fff;
}
.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(112deg, rgba(11, 17, 32, .94) 30%, rgba(37, 99, 235, .72) 100%);
}
.cta-inner {
  position: relative;
  z-index: 1;
  max-width: 700px;
}
.cta-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .18em;
  color: rgba(255, 255, 255, .8);
  border: 1px solid rgba(255, 255, 255, .3);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 18px;
  background: rgba(255, 255, 255, .08);
  backdrop-filter: blur(4px);
}
.cta-inner h2 {
  color: #fff;
  font-size: clamp(28px, 3.4vw, 38px);
  margin-bottom: 12px;
}
.cta-inner p {
  color: rgba(255, 255, 255, .85);
  font-size: 17px;
  margin-bottom: 28px;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-section) 0;
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .25s ease;
}
.faq-item:hover {
  border-color: rgba(37, 99, 235, .3);
  box-shadow: var(--shadow);
}
.faq-item[open] {
  border-color: rgba(37, 99, 235, .4);
  box-shadow: var(--shadow);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-size: 16px;
  font-weight: 700;
  color: var(--dark);
  cursor: pointer;
  list-style: none;
  transition: color .2s;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 13px;
  color: var(--primary);
  transition: transform .28s ease;
  flex-shrink: 0;
}
.faq-item[open] summary::after {
  transform: rotate(180deg);
}
.faq-item summary:hover {
  color: var(--primary);
}
.faq-content {
  padding: 0 22px 20px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-deep);
  color: rgba(255, 255, 255, .72);
  padding: 64px 0 0;
}
.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1.4fr;
  gap: 44px;
  padding-bottom: 40px;
}
.footer-brand {
  display: inline-block;
  font-size: 26px;
  font-weight: 900;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}
.footer-brand span {
  color: var(--primary);
}
.footer-desc {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .55);
  max-width: 340px;
  margin: 0;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 16px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, .62);
  transition: all .2s;
}
.footer-col ul a:hover {
  color: #fff;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, .62);
}
.footer-contact svg {
  width: 17px;
  height: 17px;
  color: var(--primary);
  flex-shrink: 0;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, .4);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root {
    --space-section: 72px;
  }
  .search-form {
    width: 210px;
  }
  .related-grid {
    gap: 18px;
  }
  .related-body {
    padding: 20px;
  }
  .article-header {
    padding: 32px 32px 0;
  }
  .article-cover {
    margin: 0 -32px;
  }
  .article-content {
    padding: 32px 32px 20px;
  }
  .article-footer {
    margin: 12px 32px 32px;
  }
  .footer-main {
    grid-template-columns: 1.6fr 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    right: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    width: 260px;
    padding: 18px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transform: translateX(120%);
    opacity: 0;
    visibility: hidden;
    transition: all .3s ease;
    margin: 0;
  }
  .main-nav.open {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-link {
    justify-content: center;
    padding: 12px 18px;
    font-size: 15px;
  }
  .search-form {
    display: none;
  }
  .search-form-mobile {
    display: block;
    margin-bottom: 10px;
  }
  .search-form-mobile input {
    width: 100%;
    height: 42px;
    padding: 0 14px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    font-size: 14px;
    outline: none;
    transition: border-color .2s;
  }
  .search-form-mobile input:focus {
    border-color: var(--primary);
    background: #fff;
  }
  .search-form-mobile input::placeholder {
    color: var(--light);
  }
}
@media (max-width: 768px) {
  :root {
    --space-section: 58px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .cta-banner {
    padding: 72px 0;
  }
  .footer-main {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-desc {
    max-width: none;
  }
}
@media (max-width: 520px) {
  :root {
    --space-section: 48px;
  }
  .header-inner {
    gap: 12px;
  }
  .brand {
    font-size: 22px;
  }
  .nav-toggle {
    width: 40px;
    height: 40px;
  }
  .article-header {
    padding: 24px 20px 0;
  }
  .article-cover {
    margin: 0 -20px;
  }
  .article-content {
    padding: 24px 20px 16px;
  }
  .article-footer {
    margin: 10px 20px 26px;
    flex-direction: column;
    align-items: flex-start;
  }
  .article-title {
    font-size: 25px;
  }
  .article-excerpt {
    font-size: 15px;
    padding: 12px 14px;
  }
  .not-found-card {
    padding: 40px 20px;
  }
  .not-found-icon {
    width: 72px;
    height: 72px;
    font-size: 24px;
    margin-bottom: 18px;
  }
  .cta-actions {
    flex-direction: column;
    width: 100%;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .footer-bottom p {
    font-size: 12px;
  }
  .faq-item summary {
    font-size: 15px;
    padding: 16px 16px;
  }
  .faq-content {
    padding: 0 16px 16px;
    font-size: 14px;
  }
}

/* roulang page: category2 */
:root {
  --primary: #0d1b3e;
  --primary-light: #15356b;
  --primary-soft: #e8edf8;
  --accent: #f05b3f;
  --accent-hover: #d94a30;
  --accent-soft: #feede8;
  --teal: #19b5a2;
  --teal-soft: #e0f6f2;
  --bg: #f4f6fb;
  --bg-alt: #ffffff;
  --bg-dark: #0b1832;
  --text: #152238;
  --text-light: #667395;
  --text-muted: #8b96ad;
  --border: #dfe5f0;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 12px rgba(13, 27, 62, 0.06);
  --shadow-md: 0 8px 32px rgba(13, 27, 62, 0.08);
  --shadow-lg: 0 16px 48px rgba(13, 27, 62, 0.12);
  --space-section: 96px;
  --space-block: 48px;
  --container: 1200px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
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: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; line-height: inherit; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ========== Header ========== */
.site-header {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(223, 229, 240, 0.7);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 72px;
}
.brand {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
  white-space: nowrap;
}
.brand span {
  color: var(--accent);
  font-weight: 700;
  background: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 6px;
  margin-left: 4px;
  font-size: 14px;
  letter-spacing: 1px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 12px;
}
.nav-link {
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: all var(--transition);
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-soft);
}
.nav-link.active {
  color: #fff;
  background: var(--primary);
  box-shadow: 0 4px 16px rgba(13, 27, 62, 0.25);
}
.header-search {
  flex: 1;
  max-width: 460px;
  margin-left: auto;
  position: relative;
}
.header-search svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  pointer-events: none;
}
.header-search input {
  width: 100%;
  height: 44px;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 0 18px 0 44px;
  font-size: 14px;
  color: var(--text);
  background: #f9fafd;
  transition: all var(--transition);
  outline: none;
}
.header-search input::placeholder { color: var(--text-muted); }
.header-search input:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(13, 27, 62, 0.08);
}
.header-cta {
  flex-shrink: 0;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 12px;
  transition: all var(--transition);
  white-space: nowrap;
  border: none;
  cursor: pointer;
}
.header-cta:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(240, 91, 63, 0.3);
}

/* ========== Page Hero ========== */
.page-hero {
  position: relative;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  padding: 88px 0 88px;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(11, 24, 50, 0.94) 0%, rgba(13, 27, 62, 0.82) 46%, rgba(13, 27, 62, 0.48) 100%);
}
.page-hero .container { position: relative; z-index: 2; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 26px;
}
.breadcrumb a { color: rgba(255, 255, 255, 0.85); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb svg { width: 14px; height: 14px; }
.hero-title {
  font-size: 48px;
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  letter-spacing: -0.5px;
  margin-bottom: 18px;
  max-width: 640px;
}
.hero-title .highlight {
  color: #ff9a80;
  position: relative;
}
.hero-subtitle {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  max-width: 560px;
  margin-bottom: 34px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 24px rgba(240, 91, 63, 0.35);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(240, 91, 63, 0.4);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.55);
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 42px;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}
.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
}
.hero-meta-item svg {
  width: 18px;
  height: 18px;
  color: #ff9a80;
  flex-shrink: 0;
}

/* ========== Section ========== */
.section {
  padding: var(--space-section) 0;
}
.section-alt {
  background: var(--bg-alt);
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-block);
}
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 100px;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.25;
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.75;
}

/* ========== Quick Start ========== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.step-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px 30px;
  position: relative;
  transition: all var(--transition);
}
.step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(13, 27, 62, 0.15);
}
.step-num {
  font-size: 44px;
  font-weight: 800;
  color: var(--primary-soft);
  line-height: 1;
  margin-bottom: 18px;
  display: block;
  letter-spacing: -1px;
  transition: color var(--transition);
}
.step-card:hover .step-num { color: var(--accent); }
.step-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--teal-soft);
  color: var(--teal);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.step-icon svg { width: 24px; height: 24px; }
.step-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.step-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}
.step-arrow {
  position: absolute;
  right: -22px;
  top: 50%;
  transform: translateY(-50%);
  width: 22px;
  height: 22px;
  color: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}
.step-arrow svg { width: 18px; height: 18px; }
.step-arrow:last-child, .steps-grid > .step-card:last-child .step-arrow { display: none; }

/* ========== Guide Cards ========== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.guide-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.guide-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(13, 27, 62, 0.12);
}
.guide-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: #fff;
}
.guide-icon svg { width: 26px; height: 26px; }
.guide-icon.i-blue { background: var(--primary); }
.guide-icon.i-orange { background: var(--accent); }
.guide-icon.i-teal { background: var(--teal); }
.guide-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}
.guide-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.75;
  margin-bottom: 18px;
  flex: 1;
}
.guide-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition);
}
.guide-link svg { width: 16px; height: 16px; transition: transform var(--transition); }
.guide-card:hover .guide-link { color: var(--accent); }
.guide-card:hover .guide-link svg { transform: translateX(4px); }

/* ========== Scenario ========== */
.scenario-list {
  display: flex;
  flex-direction: column;
  gap: 36px;
}
.scenario-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.scenario-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.scenario-item:nth-child(even) .scenario-img { order: 2; }
.scenario-img {
  position: relative;
  min-height: 320px;
  overflow: hidden;
}
.scenario-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.scenario-item:hover .scenario-img img { transform: scale(1.04); }
.scenario-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11, 24, 50, 0.18), transparent 50%);
}
.scenario-content {
  padding: 44px 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.scenario-tag {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  padding: 5px 14px;
  border-radius: 100px;
  background: var(--teal-soft);
  color: var(--teal);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}
.scenario-tag.t-orange { background: var(--accent-soft); color: var(--accent); }
.scenario-tag.t-blue { background: var(--primary-soft); color: var(--primary); }
.scenario-content h3 {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 14px;
}
.scenario-content p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 22px;
}
.scenario-list-ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 22px;
}
.scenario-list-ul li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--text);
}
.scenario-list-ul li svg {
  width: 18px;
  height: 18px;
  color: var(--teal);
  flex-shrink: 0;
  margin-top: 3px;
}

/* ========== Metrics ========== */
.metrics {
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  padding: 80px 0;
}
.metrics::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(11, 24, 50, 0.95) 0%, rgba(13, 27, 62, 0.82) 100%);
}
.metrics .container { position: relative; z-index: 2; }
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.metric-num {
  font-size: 52px;
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 8px;
}
.metric-num span { color: #ff9a80; }
.metric-label {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.78);
  font-weight: 500;
}
.metric-item + .metric-item { border-left: 1px solid rgba(255, 255, 255, 0.1); }

/* ========== Tips ========== */
.tips-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}
.tips-intro {
  position: sticky;
  top: 96px;
}
.tips-intro .section-tag { background: var(--accent-soft); color: var(--accent); }
.tips-intro h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 16px;
}
.tips-intro p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 24px;
}
.tips-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.tip-item {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  display: flex;
  align-items: flex-start;
  gap: 18px;
  transition: all var(--transition);
}
.tip-item:hover {
  border-color: rgba(13, 27, 62, 0.2);
  box-shadow: var(--shadow-sm);
  transform: translateX(4px);
}
.tip-num {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.tip-item h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}
.tip-item p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover { border-color: rgba(13, 27, 62, 0.18); }
.faq-item[open] { box-shadow: var(--shadow-sm); border-color: rgba(13, 27, 62, 0.18); }
.faq-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 26px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  transition: color var(--transition);
}
.faq-summary::-webkit-details-marker { display: none; }
.faq-summary:hover { color: var(--accent); }
.faq-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
}
.faq-icon svg { width: 16px; height: 16px; transition: transform var(--transition); }
.faq-item[open] .faq-icon {
  background: var(--accent);
  color: #fff;
}
.faq-item[open] .faq-icon svg { transform: rotate(45deg); }
.faq-answer {
  padding: 0 26px 24px;
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
  border-top: 1px dashed var(--border);
  margin-top: 0;
  padding-top: 18px;
}

/* ========== CTA ========== */
.cta-box {
  background: var(--primary);
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-lg);
  padding: 64px 56px;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(21, 53, 107, 0.82) 0%, rgba(11, 24, 50, 0.95) 100%);
}
.cta-box .container { position: relative; z-index: 2; }
.cta-box h2 {
  font-size: 34px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
  line-height: 1.3;
}
.cta-box p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.82);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.75;
}
.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--primary);
  color: rgba(255, 255, 255, 0.75);
  padding: 64px 0 0;
}
.footer-main {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-brand {
  font-size: 26px;
  font-weight: 800;
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 16px;
}
.footer-brand span {
  color: #ff9a80;
  font-size: 15px;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.12);
  padding: 2px 10px;
  border-radius: 6px;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.65);
  max-width: 320px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition);
}
.footer-col ul li a:hover { color: #ff9a80; padding-left: 4px; }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}
.footer-contact svg {
  width: 18px;
  height: 18px;
  color: #ff9a80;
  flex-shrink: 0;
}
.footer-bottom {
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 36px; }
  .metric-item + .metric-item { border-left: none; }
  .metric-item:nth-child(odd) { border-right: 1px solid rgba(255, 255, 255, 0.1); }
  .scenario-item { grid-template-columns: 1fr; }
  .scenario-item:nth-child(even) .scenario-img { order: 0; }
  .scenario-img { min-height: 260px; }
  .footer-main { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  :root { --space-section: 64px; }
  .header-inner { flex-wrap: wrap; height: auto; padding: 14px 0 12px; gap: 12px; }
  .brand { font-size: 22px; }
  .main-nav { order: 3; width: 100%; overflow-x: auto; margin-left: 0; gap: 6px; padding-bottom: 2px; scrollbar-width: none; }
  .main-nav::-webkit-scrollbar { display: none; }
  .nav-link { padding: 8px 14px; font-size: 14px; white-space: nowrap; }
  .header-search { order: 4; width: 100%; max-width: none; margin-left: 0; }
  .header-cta { order: 2; margin-left: auto; height: 38px; padding: 0 16px; font-size: 13px; }
  .hero-title { font-size: 34px; }
  .hero-subtitle { font-size: 15px; }
  .section-head h2 { font-size: 28px; }
  .cards-grid { grid-template-columns: 1fr; }
  .tips-layout { grid-template-columns: 1fr; }
  .tips-intro { position: static; }
  .scenario-content { padding: 28px 24px; }
  .cta-box { padding: 48px 28px; }
  .cta-box h2 { font-size: 26px; }
  .footer-main { grid-template-columns: 1fr; gap: 36px; }
  .metrics-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .metric-num { font-size: 36px; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .hero-title { font-size: 28px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .steps-grid { grid-template-columns: 1fr; }
  .step-arrow { display: none; }
  .metric-num { font-size: 30px; }
  .metrics-grid { gap: 16px; }
  .metric-label { font-size: 13px; }
  .faq-summary { padding: 18px 18px; font-size: 15px; }
  .faq-answer { padding: 0 18px 20px; }
  .cta-actions .btn { width: 100%; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-desc { max-width: 100%; }
}