/* roulang page: index */
:root {
  --primary: #4A7DBF;
  --primary-dark: #2D5A8E;
  --primary-light: #E8F0FA;
  --secondary: #FF7A45;
  --secondary-light: #FFE8DE;
  --bg: #F5F8FC;
  --surface: #FFFFFF;
  --text-1: #1F2D3D;
  --text-2: #5A6B7F;
  --text-3: #8A9AAD;
  --border: #E3EAF2;
  --success: #2EB872;
  --warning: #FFB020;
  --error: #E5484D;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-card: 0 2px 8px rgba(31, 45, 61, 0.06), 0 4px 16px rgba(31, 45, 61, 0.04);
  --shadow-hover: 0 4px 12px rgba(31, 45, 61, 0.10), 0 8px 24px rgba(31, 45, 61, 0.06);
  --container-max: 1200px;
  --header-h: 68px;
  --bottom-tab-h: 60px;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
  background: var(--bg);
  color: var(--text-1);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
  height: auto;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color .2s;
}
a:hover {
  color: var(--primary-dark);
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
input, textarea {
  font-family: inherit;
}
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
section {
  padding: 64px 0;
}
@media (max-width: 768px) {
  section {
    padding: 40px 0;
  }
  .container {
    padding: 0 16px;
  }
}
h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text-1);
}
.section-title {
  font-size: 28px;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
  text-align: center;
}
.section-subtitle {
  text-align: center;
  color: var(--text-2);
  font-size: 15px;
  margin-bottom: 40px;
}
@media (max-width: 768px) {
  .section-title {
    font-size: 22px;
  }
  .section-subtitle {
    font-size: 14px;
    margin-bottom: 28px;
  }
}

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(227, 234, 242, 0.6);
  transition: box-shadow .3s, background .3s;
}
.site-header.scrolled {
  box-shadow: 0 1px 4px rgba(31, 45, 61, 0.05);
  background: rgba(255, 255, 255, 0.98);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--text-1);
  letter-spacing: -0.3px;
  flex-shrink: 0;
}
.logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, #4A7DBF, #2D5A8E);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.nav-links a {
  display: block;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
  position: relative;
  transition: color .2s, background .2s;
}
.nav-links a:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.nav-links a.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 18px;
  right: 18px;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: var(--primary);
}
.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  transition: all .25s;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, #4A7DBF, #5B8FC7);
  color: #fff;
  border: none;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(74, 125, 191, 0.3);
  color: #fff;
  background: linear-gradient(135deg, #3D6CA8, #4A7DBF);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}
.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
  padding: 10px 22px;
}
.btn-secondary:hover {
  background: var(--primary-light);
  border-color: #3D6CA8;
  color: #2D5A8E;
}
.btn-cta {
  background: linear-gradient(135deg, #FF7A45, #FF9A6C);
  color: #fff;
  padding: 14px 32px;
  border-radius: 10px;
  font-weight: 700;
  border: none;
}
.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 122, 69, 0.35);
  color: #fff;
}
.btn-cta:active {
  transform: translateY(0);
}
.btn-ghost {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border);
  padding: 10px 20px;
}
.btn-ghost:hover {
  background: #F0F5FA;
  color: var(--text-1);
}
@media (max-width: 768px) {
  .site-header {
    height: 56px;
  }
  .header-inner {
    height: 56px;
  }
  .logo {
    font-size: 18px;
  }
  .logo-icon {
    width: 28px;
    height: 28px;
    font-size: 13px;
    border-radius: 7px;
  }
  .nav-links {
    display: none;
  }
  .header-cta .btn-ghost {
    display: none;
  }
  .header-cta .btn-primary {
    padding: 8px 16px;
    font-size: 13px;
    border-radius: 8px;
  }
}

/* ===== Bottom Tab (mobile) ===== */
.bottom-tab {
  display: none;
}
@media (max-width: 768px) {
  .bottom-tab {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: #fff;
    border-top: 1px solid var(--border);
    height: calc(var(--bottom-tab-h) + env(safe-area-inset-bottom));
    padding-bottom: env(safe-area-inset-bottom);
    box-shadow: 0 -2px 10px rgba(31, 45, 61, 0.04);
  }
  .bottom-tab__item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: 6px 0;
    color: var(--text-3);
    min-height: 44px;
  }
  .bottom-tab__item svg {
    width: 22px;
    height: 22px;
  }
  .bottom-tab__item span {
    font-size: 11px;
    font-weight: 500;
    line-height: 1.2;
  }
  .bottom-tab__item.active {
    color: var(--primary);
  }
  .bottom-tab__item.active span {
    font-weight: 600;
  }
  .bottom-tab__item.active svg {
    color: var(--primary);
  }
  body {
    padding-bottom: calc(var(--bottom-tab-h) + env(safe-area-inset-bottom));
  }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  background: linear-gradient(120deg, rgba(245, 248, 252, 0.97) 0%, rgba(245, 248, 252, 0.85) 50%, rgba(255, 255, 255, 0.92) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #4A7DBF, #FF7A45, #4A7DBF);
  opacity: 0.6;
}
.hero .container {
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--secondary-light);
  color: #E8632C;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 20px;
}
.hero-badge svg {
  width: 14px;
  height: 14px;
}
.hero h1 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-1);
  margin-bottom: 20px;
  max-width: 640px;
  letter-spacing: -0.5px;
}
.hero h1 .highlight {
  color: var(--primary);
  position: relative;
}
.hero-desc {
  font-size: 17px;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 30px;
  max-width: 520px;
}
.hero-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 30px;
}
.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  list-style: none;
  padding: 0;
}
.hero-points li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-2);
  background: rgba(255, 255, 255, 0.7);
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
}
.hero-points li svg {
  width: 15px;
  height: 15px;
  color: var(--primary);
}
@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: 90px 0 48px;
    background: linear-gradient(120deg, rgba(245, 248, 252, 0.98) 0%, rgba(245, 248, 252, 0.9) 60%, rgba(255, 255, 255, 0.95) 100%), url('/assets/images/backpic/back-1.png') center 30% / cover no-repeat;
  }
  .hero h1 {
    font-size: 26px;
    line-height: 1.3;
    margin-bottom: 16px;
  }
  .hero-desc {
    font-size: 15px;
    margin-bottom: 24px;
  }
  .hero-btns {
    gap: 12px;
    margin-bottom: 24px;
  }
  .hero-btns .btn {
    padding: 10px 20px;
    font-size: 14px;
    flex: 1;
  }
  .hero-points {
    gap: 8px;
  }
  .hero-points li {
    font-size: 12px;
    padding: 4px 10px;
  }
  .hero-badge {
    font-size: 12px;
    padding: 4px 10px;
  }
}

/* ===== Countdown Bar ===== */
.countdown-wrap {
  background: linear-gradient(135deg, #FFE8DE, #FFF3ED);
  border-top: 1px solid #FFD6C4;
  border-bottom: 1px solid #FFD6C4;
  padding: 18px 0;
}
.countdown-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
}
.countdown-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: #D05A2A;
}
.countdown-label svg {
  width: 18px;
  height: 18px;
}
.countdown-items {
  display: flex;
  gap: 10px;
  align-items: center;
}
.countdown-item {
  background: #fff;
  border-radius: 10px;
  padding: 8px 14px;
  min-width: 70px;
  text-align: center;
  box-shadow: 0 2px 6px rgba(255, 122, 69, 0.1);
}
.countdown-item .num {
  font-size: 30px;
  font-weight: 800;
  line-height: 1.2;
  font-family: 'Inter', 'Roboto Mono', monospace;
  color: var(--text-1);
}
.countdown-item .unit {
  font-size: 12px;
  color: var(--text-3);
}
.countdown-sep {
  font-weight: 800;
  color: #D05A2A;
  font-size: 20px;
}
.countdown-end {
  font-size: 15px;
  font-weight: 600;
  color: #D05A2A;
  background: #fff;
  padding: 8px 20px;
  border-radius: 20px;
  box-shadow: 0 2px 6px rgba(255, 122, 69, 0.1);
}
@media (max-width: 768px) {
  .countdown-wrap {
    padding: 14px 0;
  }
  .countdown-inner {
    gap: 12px;
  }
  .countdown-item {
    padding: 4px 8px;
    min-width: 52px;
  }
  .countdown-item .num {
    font-size: 22px;
  }
  .countdown-item .unit {
    font-size: 10px;
  }
  .countdown-label {
    font-size: 13px;
    width: 100%;
    justify-content: center;
  }
  .countdown-sep {
    font-size: 16px;
  }
}

/* ===== Activity Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 20px;
}
.feature-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: transform .3s, box-shadow .3s;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 0 4px 4px 0;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.feature-card__icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.feature-card__icon svg {
  width: 22px;
  height: 22px;
}
.feature-card__icon.secondary {
  background: var(--secondary-light);
  color: var(--secondary);
}
.feature-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
}
@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .feature-card {
    padding: 18px;
  }
  .feature-card h3 {
    font-size: 16px;
  }
}

/* ===== Gallery ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform .3s, box-shadow .3s;
  background: var(--primary-light);
  min-height: 220px;
}
.gallery-item:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-hover);
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s;
}
.gallery-item:hover img {
  transform: scale(1.05);
}
.gallery-item:nth-child(1) {
  grid-row: span 2;
}
.gallery-item:nth-child(4) {
  grid-row: span 2;
}
.gallery-item__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 30px 16px 14px;
  background: linear-gradient(transparent, rgba(31, 45, 61, 0.7));
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: flex-end;
  gap: 6px;
}
.gallery-item__caption span {
  background: rgba(255, 122, 69, 0.9);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 700;
}
@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .gallery-item {
    min-height: 140px;
  }
  .gallery-item:nth-child(1),
  .gallery-item:nth-child(4) {
    grid-row: span 1;
  }
  .gallery-item__caption {
    font-size: 12px;
    padding: 20px 8px 8px;
  }
  .gallery-item__caption span {
    font-size: 10px;
    padding: 1px 6px;
  }
}

/* ===== CTA Section ===== */
.cta-section {
  background: linear-gradient(135deg, #4A7DBF, #2D5A8E);
  border-radius: 0;
  position: relative;
  overflow: hidden;
  padding: 72px 0;
  text-align: center;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}
.cta-section::after {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(255, 122, 69, 0.12);
}
.cta-content {
  position: relative;
  z-index: 2;
}
.cta-section h2 {
  color: #fff;
  font-size: 30px;
  margin-bottom: 12px;
}
.cta-section p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 16px;
  margin-bottom: 28px;
}
.cta-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}
.cta-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.cta-badge svg {
  width: 14px;
  height: 14px;
}
@media (max-width: 768px) {
  .cta-section {
    padding: 48px 0;
  }
  .cta-section h2 {
    font-size: 22px;
  }
  .cta-section p {
    font-size: 14px;
    margin-bottom: 20px;
  }
  .cta-badges {
    gap: 8px;
  }
  .cta-badge {
    font-size: 12px;
    padding: 4px 12px;
  }
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  margin-bottom: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow .3s;
}
.faq-item:hover {
  box-shadow: var(--shadow-hover);
}
.faq-item__question {
  width: 100%;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-1);
  text-align: left;
  gap: 12px;
  background: none;
  border: none;
  cursor: pointer;
  transition: background .2s;
}
.faq-item__question:hover {
  background: #FAFBFD;
}
.faq-item__question svg {
  width: 18px;
  height: 18px;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform .25s;
}
.faq-item.active .faq-item__question svg {
  transform: rotate(45deg);
}
.faq-item__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.faq-item__content-inner {
  padding: 0 20px 20px;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.7;
}
@media (max-width: 768px) {
  .faq-item__question {
    padding: 14px 16px;
    font-size: 14px;
  }
  .faq-item__content-inner {
    padding: 0 16px 16px;
    font-size: 13px;
  }
}

/* ===== News / CMS List ===== */
.news-section {
  background: var(--bg);
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}
.news-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  transition: box-shadow .3s, transform .3s;
  overflow: hidden;
}
.news-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.news-card a {
  display: flex;
  gap: 18px;
  padding: 16px;
  color: inherit;
  text-decoration: none;
  align-items: center;
}
.news-card__thumb {
  width: 140px;
  height: 90px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--primary-light);
}
.news-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.news-card__body {
  flex: 1;
  min-width: 0;
}
.news-card__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.news-card__tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 4px;
  flex-shrink: 0;
}
.news-card__time {
  font-size: 12px;
  color: var(--text-3);
}
.news-card__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 4px;
  line-height: 1.4;
  transition: color .2s;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}
.news-card:hover .news-card__title {
  color: var(--primary);
}
.news-card__summary {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.news-card__more {
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
  margin-top: 6px;
  display: inline-block;
}
.news-card__more:hover {
  color: var(--primary-dark);
}
.news-empty {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 40px;
  text-align: center;
  color: var(--text-3);
  border: 1px dashed var(--border);
  font-size: 15px;
}
@media (max-width: 768px) {
  .news-card a {
    flex-direction: row;
    padding: 12px;
    gap: 12px;
  }
  .news-card__thumb {
    width: 90px;
    height: 70px;
  }
  .news-card__title {
    font-size: 15px;
    -webkit-line-clamp: 2;
  }
  .news-card__summary {
    font-size: 13px;
    -webkit-line-clamp: 2;
  }
  .news-card__meta {
    flex-wrap: wrap;
    gap: 6px;
  }
}

/* ===== Footer ===== */
.site-footer {
  background: #1F2D3D;
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 24px;
  margin-top: 0;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand .logo {
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand .logo .logo-icon {
  background: linear-gradient(135deg, #5B8FC7, #4A7DBF);
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 320px;
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}
.footer-links {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  transition: color .2s;
}
.footer-links a:hover {
  color: #fff;
}
.footer-note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
}
.footer-bottom {
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
}
@media (max-width: 768px) {
  .site-footer {
    padding: 40px 0 20px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-bottom: 28px;
  }
  .footer-title {
    margin-bottom: 12px;
  }
  .footer-links {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 12px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 6px;
  }
}

/* ===== Focus / Accessibility ===== */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ===== Animations ===== */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.animate-up {
  animation: fadeUp .6s ease-out both;
}
.animate-up.delay-1 {
  animation-delay: .1s;
}
.animate-up.delay-2 {
  animation-delay: .2s;
}

/* roulang page: article */
:root {
  --primary: #4A7DBF;
  --primary-light: #E8F0FA;
  --primary-dark: #2D5A8E;
  --primary-gradient: linear-gradient(135deg, #4A7DBF 0%, #5B8FC7 100%);
  --secondary: #FF7A45;
  --secondary-light: #FFE8DE;
  --secondary-gradient: linear-gradient(135deg, #FF7A45 0%, #FF9A6C 100%);
  --bg: #F5F8FC;
  --surface: #FFFFFF;
  --text-primary: #1F2D3D;
  --text-secondary: #5A6B7F;
  --text-muted: #8A9AAD;
  --border: #E3EAF2;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-card: 0 2px 8px rgba(31, 45, 61, 0.06), 0 4px 16px rgba(31, 45, 61, 0.04);
  --shadow-hover: 0 4px 12px rgba(31, 45, 61, 0.10), 0 8px 24px rgba(31, 45, 61, 0.06);
  --shadow-nav: 0 1px 4px rgba(31, 45, 61, 0.05);
  --font-cn: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Helvetica Neue', Arial, sans-serif;
  --font-num: 'Inter', 'Roboto Mono', 'SF Mono', monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-cn);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg);
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--primary-dark); }
button { font-family: inherit; cursor: pointer; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(245, 248, 252, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(227, 234, 242, 0.7);
  transition: box-shadow 0.3s ease, background 0.3s ease;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow-nav);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: 24px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 19px; font-weight: 700; color: var(--text-primary);
  white-space: nowrap;
}
.logo:hover { color: var(--text-primary); }
.logo-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--primary-gradient); color: #fff;
  font-size: 15px; font-weight: 800; letter-spacing: -0.5px;
  box-shadow: 0 4px 10px rgba(74, 125, 191, 0.25);
}
.site-header nav { display: flex; }
.nav-links {
  list-style: none; display: flex; align-items: center; gap: 6px;
}
.nav-links a {
  display: inline-block; padding: 8px 14px;
  font-size: 15px; font-weight: 500; color: var(--text-secondary);
  border-radius: var(--radius-md); position: relative;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--primary); background: var(--primary-light); }
.nav-links a.active { color: var(--primary); font-weight: 600; }
.nav-links a.active::after {
  content: ''; position: absolute; left: 14px; right: 14px; bottom: 3px;
  height: 2px; border-radius: 2px; background: var(--primary);
}
.header-cta { display: flex; align-items: center; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 10px 22px; border-radius: var(--radius-md);
  font-size: 14px; font-weight: 600; line-height: 1.4;
  border: none; transition: all 0.25s ease; white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-primary {
  background: var(--primary-gradient); color: #fff;
  box-shadow: 0 2px 8px rgba(74, 125, 191, 0.2);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(74, 125, 191, 0.3); background: linear-gradient(135deg, #3D6CA8, #4A7DBF); color: #fff; }
.btn-primary:active { transform: translateY(0); box-shadow: none; }
.btn-ghost {
  background: transparent; color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: #F0F5FA; color: var(--text-primary); border-color: #C9D8E8; }
.btn-secondary {
  background: transparent; color: var(--primary);
  border: 2px solid var(--primary); font-weight: 500;
}
.btn-secondary:hover { background: var(--primary-light); border-color: var(--primary-dark); color: var(--primary-dark); }
.btn-cta {
  background: var(--secondary-gradient); color: #fff;
  padding: 14px 34px; font-size: 15px; font-weight: 700;
  border-radius: var(--radius-md); box-shadow: 0 4px 14px rgba(255, 122, 69, 0.3);
}
.btn-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(255, 122, 69, 0.36); color: #fff; }
.btn-cta:active { transform: translateY(0); }

/* 移动端底部Tab */
.mobile-tabbar {
  display: none; position: fixed; bottom: 0; left: 0; right: 0;
  height: 60px; background: var(--surface);
  border-top: 1px solid var(--border);
  z-index: 1100; padding-bottom: env(safe-area-inset-bottom);
  box-shadow: 0 -2px 10px rgba(31, 45, 61, 0.04);
}
.mobile-tabbar-inner {
  display: flex; height: 60px; align-items: stretch;
  max-width: 520px; margin: 0 auto;
}
.mobile-tab-item {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 3px;
  color: var(--text-muted); font-size: 11px; font-weight: 500;
  transition: color 0.2s;
}
.mobile-tab-item svg { width: 22px; height: 22px; transition: transform 0.2s; }
.mobile-tab-item.active { color: var(--primary); }
.mobile-tab-item.active svg { transform: scale(1.05); }
.mobile-tab-item.active .tab-dot {
  width: 4px; height: 4px; border-radius: 50%; background: var(--primary);
  margin-top: 2px;
}

/* 面包屑 */
.breadcrumb-wrap {
  padding: 28px 0 8px;
}
.breadcrumb {
  display: flex; align-items: center; flex-wrap: wrap;
  gap: 8px; font-size: 14px; color: var(--text-muted);
}
.breadcrumb a { color: var(--text-secondary); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--primary); }
.crumb-sep { color: #C0CFDF; font-size: 13px; }
.breadcrumb .current { color: var(--text-muted); max-width: 320px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* 文章页 */
.article-page { padding: 0 0 72px; }
.article-layout {
  max-width: 860px; margin: 0 auto;
}
.article-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 48px 56px;
  margin-top: 20px;
}
.article-meta {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-bottom: 16px;
}
.article-category {
  display: inline-block; padding: 4px 12px;
  background: var(--primary-light); color: var(--primary);
  font-size: 13px; font-weight: 600; border-radius: 20px;
}
.article-date {
  font-size: 13px; color: var(--text-muted);
  font-family: var(--font-num);
}
.article-title {
  font-size: 34px; line-height: 1.3; font-weight: 700;
  color: var(--text-primary); letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.article-meta-line {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  padding-bottom: 24px; margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
  font-size: 14px; color: var(--text-muted);
}
.article-meta-line span { display: inline-flex; align-items: center; gap: 6px; }
.article-meta-line svg { width: 16px; height: 16px; opacity: 0.7; }

.article-content {
  font-size: 16px; line-height: 2.0; color: #2A3B4D;
  word-break: break-word;
}
.article-content p { margin-bottom: 1.6em; }
.article-content h2 {
  font-size: 24px; font-weight: 700; margin: 2em 0 0.7em;
  color: var(--text-primary); line-height: 1.4;
  padding-bottom: 8px; border-bottom: 1px solid var(--border);
}
.article-content h3 {
  font-size: 20px; font-weight: 700; margin: 1.8em 0 0.6em;
  color: var(--text-primary); line-height: 1.4;
}
.article-content h4 {
  font-size: 17px; font-weight: 600; margin: 1.5em 0 0.5em;
  color: var(--text-primary);
}
.article-content ul, .article-content ol {
  margin: 0 0 1.6em 1.4em;
}
.article-content ul li, .article-content ol li { margin-bottom: 0.5em; }
.article-content ul li::marker, .article-content ol li::marker { color: var(--primary); }
.article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--primary-dark); }
.article-content blockquote {
  margin: 1.8em 0; padding: 16px 24px;
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-secondary);
  font-style: normal;
}
.article-content blockquote p:last-child { margin-bottom: 0; }
.article-content img {
  border-radius: var(--radius-md); margin: 1.8em auto;
  box-shadow: var(--shadow-card);
}
.article-content pre {
  background: #2A3B4D; color: #E8F0FA;
  padding: 18px 22px; border-radius: var(--radius-md);
  overflow-x: auto; font-size: 14px; line-height: 1.7;
  margin: 1.6em 0; font-family: var(--font-num);
}
.article-content code {
  font-family: var(--font-num); font-size: 0.9em;
  background: var(--primary-light); color: var(--primary-dark);
  padding: 2px 6px; border-radius: 4px;
}
.article-content pre code {
  background: transparent; color: inherit; padding: 0; border-radius: 0;
}
.article-content table {
  width: 100%; border-collapse: collapse; margin: 1.6em 0;
  font-size: 14px;
}
.article-content th, .article-content td {
  border: 1px solid var(--border); padding: 10px 14px;
  text-align: left;
}
.article-content th { background: var(--primary-light); font-weight: 600; color: var(--text-primary); }
.article-content tr:nth-child(even) { background: #F8FBFE; }

.article-tags {
  margin-top: 40px; padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.tag-label { font-size: 13px; color: var(--text-muted); margin-right: 4px; }
.tag-item {
  display: inline-block; padding: 4px 12px;
  background: #F0F5FA; border: 1px solid var(--border);
  border-radius: 20px; font-size: 13px; color: var(--text-secondary);
  transition: all 0.2s;
}
.tag-item:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }

/* 空状态 */
.article-empty {
  text-align: center; padding: 80px 40px;
}
.article-empty-icon {
  width: 64px; height: 64px; margin: 0 auto 20px;
  background: var(--primary-light); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.article-empty-icon svg { width: 30px; height: 30px; color: var(--primary); }
.article-empty h2 {
  font-size: 24px; font-weight: 700; margin-bottom: 12px;
  color: var(--text-primary);
}
.article-empty p { color: var(--text-secondary); margin-bottom: 28px; }

/* 相关推荐 */
.related-section {
  max-width: 860px; margin: 48px auto 0;
}
.related-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px;
}
.related-header h2 {
  font-size: 22px; font-weight: 700; color: var(--text-primary);
}
.related-link { font-size: 14px; color: var(--text-muted); transition: color 0.2s; }
.related-link:hover { color: var(--primary); }
.related-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.related-card {
  background: var(--surface); border-radius: var(--radius-md);
  padding: 20px; box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex; flex-direction: column;
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.related-card-thumb {
  border-radius: 8px; overflow: hidden; margin-bottom: 14px;
  aspect-ratio: 16 / 9; background: var(--primary-light);
}
.related-card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.related-card:hover .related-card-thumb img { transform: scale(1.03); }
.related-card h3 {
  font-size: 15px; font-weight: 600; color: var(--text-primary);
  line-height: 1.5; margin-bottom: 8px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.related-card h3 a { color: inherit; }
.related-card h3 a:hover { color: var(--primary); }
.related-card p {
  font-size: 13px; color: var(--text-muted); line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: 12px; flex: 1;
}
.related-card-meta {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 12px; color: var(--text-muted);
}
.related-card-meta .read-more { color: var(--primary); font-weight: 500; }

/* 页脚 */
.site-footer {
  background: #1F2D3D; color: #B8C6D4;
  padding: 56px 0 32px; margin-top: 0;
}
.footer-top {
  display: grid; grid-template-columns: 1.5fr 1fr 1.2fr;
  gap: 48px; margin-bottom: 44px;
}
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand .logo .logo-icon { background: var(--primary-gradient); }
.footer-brand p {
  font-size: 14px; line-height: 1.8; color: #93A5B5;
  max-width: 360px;
}
.footer-title {
  font-size: 15px; font-weight: 600; color: #fff;
  margin-bottom: 16px;
}
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  color: #93A5B5; font-size: 14px; transition: color 0.2s;
}
.footer-links a:hover { color: var(--secondary); }
.footer-note {
  font-size: 13px; line-height: 1.8; color: #93A5B5;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
  font-size: 13px; color: #7A8FA3;
}

/* 响应式 */
@media (max-width: 1024px) {
  .header-cta .btn-ghost { display: none; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .site-header { padding-bottom: 0; }
  .site-header nav { display: none; }
  .header-cta { display: none; }
  .header-inner { height: 60px; justify-content: center; }
  .mobile-tabbar { display: block; }
  body { padding-bottom: 60px; }
  .breadcrumb-wrap { padding-top: 20px; }
  .article-card { padding: 28px 20px; border-radius: var(--radius-md); }
  .article-title { font-size: 26px; }
  .article-content { font-size: 15px; line-height: 1.9; }
  .article-content h2 { font-size: 21px; }
  .article-content h3 { font-size: 18px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .article-layout, .related-section { max-width: 100%; }
  .breadcrumb .current { max-width: 150px; }
}
@media (max-width: 520px) {
  .article-meta-line { gap: 12px; }
  .related-grid { grid-template-columns: 1fr; }
  .article-card { padding: 24px 16px; }
  .article-title { font-size: 23px; line-height: 1.35; }
  .article-content { font-size: 15px; }
  .mobile-tabbar { height: 58px; }
  .mobile-tabbar-inner { height: 58px; }
  .footer-top { gap: 28px; }
}
@media (min-width: 769px) {
  .mobile-tabbar { display: none !important; }
}

/* roulang page: category1 */
:root {
  --primary: #4A7DBF;
  --primary-light: #E8F0FA;
  --primary-dark: #2D5A8E;
  --secondary: #FF7A45;
  --secondary-light: #FFE8DE;
  --bg: #F5F8FC;
  --surface: #FFFFFF;
  --text: #1F2D3D;
  --text-secondary: #5A6B7F;
  --text-muted: #8A9AAD;
  --border: #E3EAF2;
  --success: #2EB872;
  --warning: #FFB020;
  --error: #E5484D;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-card: 0 2px 8px rgba(31, 45, 61, 0.06), 0 4px 16px rgba(31, 45, 61, 0.04);
  --shadow-hover: 0 4px 12px rgba(31, 45, 61, 0.10), 0 8px 24px rgba(31, 45, 61, 0.06);
  --font-cn: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
  --font-num: 'Inter', 'Roboto Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; line-height: inherit; }

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

@media (max-width: 768px) {
  .container { padding: 0 16px; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  font-weight: 600;
  border-radius: var(--radius-md);
  padding: 12px 24px;
  font-size: 15px;
  line-height: 1.4;
  transition: all .25s ease;
  min-height: 44px;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, #4A7DBF 0%, #5B8FC7 100%);
  color: #fff;
  box-shadow: 0 2px 6px rgba(74, 125, 191, 0.2);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #3D6CA8, #4A7DBF);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(74, 125, 191, 0.3);
}
.btn-primary:active { transform: translateY(0); box-shadow: none; }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: #F0F5FA;
  color: var(--text);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-secondary:hover {
  background: var(--primary-light);
  border-color: var(--primary-dark);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

.btn-cta {
  background: linear-gradient(135deg, #FF7A45 0%, #FF9A6C 100%);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(255, 122, 69, 0.3);
}
.btn-cta:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(255, 122, 69, 0.4);
}
.btn-cta:active { transform: translateY(0); }

.btn:focus-visible,
a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ===== Badges / Tags ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  background: var(--primary-light);
  color: var(--primary-dark);
  line-height: 1.5;
}

.badge-orange {
  background: var(--secondary-light);
  color: #D95A2B;
}

.badge-green {
  background: #E5F6EC;
  color: #1E8E5A;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(227, 234, 242, 0.7);
  transition: box-shadow .3s ease;
}

.site-header.scrolled {
  box-shadow: 0 1px 4px rgba(31, 45, 61, 0.05);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.2px;
  flex-shrink: 0;
}

.logo:hover { color: var(--text); }

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  font-family: var(--font-num);
  letter-spacing: 0;
}

.site-header .nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-header .nav-links a {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: all .2s ease;
  min-height: 44px;
}

.site-header .nav-links a:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.site-header .nav-links a.active {
  color: var(--primary);
  font-weight: 600;
}

.site-header .nav-links a.active::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-cta .btn {
  padding: 10px 20px;
  font-size: 14px;
  min-height: 40px;
}

/* ===== Mobile Bottom Tabs ===== */
.bottom-tabs {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--surface);
  border-top: 1px solid var(--border);
  box-shadow: 0 -2px 8px rgba(31, 45, 61, 0.04);
  padding-bottom: env(safe-area-inset-bottom);
}

.bottom-tabs .tab-list {
  display: flex;
  align-items: stretch;
  justify-content: space-around;
  height: 60px;
}

.bottom-tabs .tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  flex: 1;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 500;
  min-height: 44px;
  transition: color .2s;
}

.bottom-tabs .tab-item.active {
  color: var(--primary);
}

.bottom-tabs .tab-item.active svg {
  color: var(--primary);
}

.bottom-tabs .tab-item svg {
  width: 22px;
  height: 22px;
}

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  margin-top: 72px;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-color: var(--bg);
  padding: 96px 0 88px;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(245, 248, 252, 0.95) 0%, rgba(245, 248, 252, 0.88) 50%, rgba(232, 240, 250, 0.76) 100%);
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.page-hero .breadcrumb a {
  color: var(--text-muted);
}

.page-hero .breadcrumb a:hover {
  color: var(--primary);
}

.page-hero .breadcrumb .sep {
  color: var(--primary);
  font-weight: 600;
}

.page-hero .breadcrumb .current {
  color: var(--primary);
  font-weight: 500;
}

.page-hero h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.page-hero .hero-desc {
  max-width: 640px;
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 28px;
}

.page-hero .hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== Section Common ===== */
.section {
  padding: 64px 0;
}

.section-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 8px;
}

.section-subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.section-header .section-title {
  margin-bottom: 0;
}

/* ===== Intro Section ===== */
.intro-section {
  padding: 80px 0 40px;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.intro-text .tag {
  display: inline-block;
  background: var(--secondary-light);
  color: #D95A2B;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 16px;
}

.intro-text h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
  margin-bottom: 16px;
}

.intro-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 12px;
}

.intro-list {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.intro-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.intro-list li svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--primary);
  margin-top: 3px;
}

.intro-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  position: relative;
}

.intro-image img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.intro-image .img-tag {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: rgba(31, 45, 61, 0.75);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 20px;
}

/* ===== Content Cards ===== */
.content-cards-section {
  padding: 48px 0 72px;
}

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

.content-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  transition: transform .3s ease, box-shadow .3s ease;
}

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

.content-card .card-img {
  position: relative;
  overflow: hidden;
  height: 190px;
}

.content-card .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

.content-card:hover .card-img img {
  transform: scale(1.04);
}

.content-card .card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(31, 45, 61, 0.25) 0%, transparent 60%);
  opacity: 0;
  transition: opacity .3s;
}

.content-card:hover .card-img::after {
  opacity: 1;
}

.content-card .card-body {
  padding: 20px;
}

.content-card .card-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
  transition: color .2s;
}

.content-card:hover .card-body h3 {
  color: var(--primary);
}

.content-card .card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 14px;
}

.content-card .card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap .2s;
}

.content-card .card-link:hover {
  gap: 8px;
  color: var(--primary-dark);
}

/* ===== Stats Section ===== */
.stats-section {
  background: var(--primary-dark);
  padding: 56px 0;
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
  z-index: 1;
}

.stat-item {
  text-align: center;
  padding: 24px 16px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item .stat-num {
  font-family: var(--font-num);
  font-size: 40px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 8px;
}

.stat-item .stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
}

/* ===== Process Section ===== */
.process-section {
  padding: 72px 0;
  background: var(--surface);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.process-item {
  position: relative;
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  background: var(--bg);
  border: 1px solid var(--border);
  transition: box-shadow .3s ease, transform .3s ease;
}

.process-item:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
}

.process-item .step-num {
  position: absolute;
  top: 20px;
  right: 20px;
  font-family: var(--font-num);
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  opacity: 0.15;
  line-height: 1;
}

.process-item .step-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.process-item .step-icon svg {
  width: 22px;
  height: 22px;
  color: var(--primary);
}

.process-item h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.process-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== FAQ Section ===== */
.faq-section {
  padding: 72px 0;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  min-height: 44px;
  transition: background .2s;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  background: var(--primary-light);
}

.faq-item summary .faq-icon {
  position: relative;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.faq-item summary .faq-icon::before,
.faq-item summary .faq-icon::after {
  content: '';
  position: absolute;
  background: var(--primary);
  border-radius: 2px;
  transition: transform .25s ease;
}

.faq-item summary .faq-icon::before {
  width: 20px;
  height: 2px;
  top: 9px;
  left: 0;
}

.faq-item summary .faq-icon::after {
  width: 2px;
  height: 20px;
  top: 0;
  left: 9px;
}

.faq-item[open] summary .faq-icon::after {
  transform: scaleY(0);
}

.faq-item[open] summary {
  background: var(--primary-light);
}

.faq-item .faq-content {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 72px 0;
  background: linear-gradient(135deg, #4A7DBF 0%, #2D5A8E 100%);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -100px;
  left: -100px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
}

.cta-section::after {
  content: '';
  position: absolute;
  bottom: -120px;
  right: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(255, 122, 69, 0.1);
}

.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 14px;
}

.cta-inner p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 28px;
}

.cta-btns {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.cta-trust {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.92);
  font-size: 13px;
  font-weight: 500;
}

.trust-badge svg {
  width: 14px;
  height: 14px;
}

/* ===== Footer ===== */
.site-footer {
  background: #1F2D3D;
  color: rgba(255, 255, 255, 0.75);
  padding: 56px 0 24px;
}

.site-footer .logo {
  color: #fff;
}

.site-footer .footer-top {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer .footer-brand p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 16px;
  max-width: 360px;
}

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

.site-footer .footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer .footer-links a {
  display: inline-block;
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  min-height: 24px;
  transition: color .2s, padding-left .2s;
}

.site-footer .footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}

.site-footer .footer-note {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.5);
}

.site-footer .footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  flex-wrap: wrap;
  gap: 8px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .content-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .intro-image img {
    height: 260px;
  }
}

@media (max-width: 768px) {
  .site-header {
    display: none;
  }

  .bottom-tabs {
    display: block;
  }

  .page-hero {
    margin-top: 0;
    padding: 100px 0 80px;
  }

  .page-hero h1 {
    font-size: 28px;
  }

  .page-hero .hero-desc {
    font-size: 15px;
  }

  .body-content {
    padding-bottom: 76px;
  }

  .section {
    padding: 48px 0;
  }

  .section-title {
    font-size: 24px;
  }

  .intro-section {
    padding: 56px 0 32px;
  }

  .content-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .stats-section {
    padding: 48px 0;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .stat-item {
    padding: 20px 12px;
  }

  .stat-item .stat-num {
    font-size: 30px;
  }

  .process-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .process-item {
    padding: 24px 20px;
  }

  .faq-item summary {
    padding: 16px 18px;
    font-size: 15px;
  }

  .faq-item .faq-content {
    padding: 0 18px 16px;
    font-size: 14px;
  }

  .cta-section {
    padding: 56px 0;
  }

  .cta-inner h2 {
    font-size: 24px;
  }

  .cta-inner p {
    font-size: 14px;
  }

  .cta-btns {
    flex-direction: column;
    align-items: center;
  }

  .cta-btns .btn {
    width: 100%;
    max-width: 280px;
  }

  .header-cta {
    display: none;
  }

  .site-footer .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-bottom: 28px;
  }

  .site-footer .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .site-header .container {
    height: 64px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .page-hero .breadcrumb {
    font-size: 13px;
  }

  .page-hero h1 {
    font-size: 26px;
  }

  .content-card .card-img {
    height: 170px;
  }

  .section-title {
    font-size: 22px;
  }

  .footer-top {
    gap: 24px;
  }
}