/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --primary: #3d7ba6;
  --primary-dark: #2f6388;
  --primary-light: rgba(61, 123, 166, 0.10);
  --accent: #b08a3f;
  --accent-dark: #a67c2e;
  --bg: #f5f7fa;
  --bg-hero: #eaf2f8;
  --card-bg: #ffffff;
  --text: #1f2a37;
  --text-secondary: #5a6b7b;
  --text-muted: #98a7b4;
  --border: #e2e8f0;
  --divider: #d6dee6;
  --success: #2e7d5b;
  --warning: #b26a2e;
  --danger: #c04040;
  --radius-card: 12px;
  --radius-nav: 14px;
  --radius-btn: 8px;
  --radius-badge: 20px;
  --shadow-sm: 0 2px 8px rgba(15, 40, 60, 0.05), 0 1px 2px rgba(15, 40, 60, 0.04);
  --shadow-hover: 0 8px 20px rgba(15, 40, 60, 0.08), 0 2px 4px rgba(15, 40, 60, 0.05);
  --trans: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  padding-bottom: 76px;
}

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

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

a:hover {
  color: var(--primary);
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

input,
textarea {
  font-family: inherit;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5 {
  color: #15202b;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.5em;
}

p {
  margin-bottom: 1em;
}

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

.container {
  max-width: 1200px;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 96px 0;
}

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

.section-head h2 {
  font-size: 32px;
  margin-bottom: 12px;
}

.section-head p {
  color: var(--text-secondary);
  font-size: 16px;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: all var(--trans);
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  padding: 14px 28px;
  font-size: 15px;
  min-height: 48px;
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
  padding: 14px 28px;
  font-size: 15px;
  min-height: 48px;
}

.btn-outline:hover,
.btn-outline:focus {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  padding: 10px 24px;
  font-size: 14px;
  min-height: 44px;
}

.btn-accent:hover,
.btn-accent:focus {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
  transform: translateY(-1px);
}

/* ========== 导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  padding: 14px 0 6px;
  background: rgba(245, 247, 250, 0.95);
}

.navbar-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-nav);
  box-shadow: var(--shadow-sm);
  height: 72px;
  padding: 0 20px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  min-width: 0;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: 0.5px;
}

.brand-text span {
  color: var(--accent);
}

.navbar-toggler {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: 18px;
  align-items: center;
  justify-content: center;
  transition: all var(--trans);
}

.navbar-toggler:hover {
  background: var(--primary-light);
}

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

.nav-link {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 16px;
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: all var(--trans);
  white-space: nowrap;
}

.nav-link i {
  font-size: 15px;
  color: var(--text-muted);
  transition: transform var(--trans);
}

.nav-link:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.nav-link:hover i {
  transform: translateY(-2px);
  color: var(--primary);
}

.nav-link.active {
  background: var(--primary-light);
  color: var(--primary);
  border-color: rgba(61, 123, 166, 0.15);
  font-weight: 600;
}

.nav-link.active i {
  color: var(--primary);
}

.nav-cta {
  flex-shrink: 0;
  min-height: 42px;
  padding: 10px 22px;
  font-size: 14px;
}

/* ========== Hero ========== */
.hero-section {
  position: relative;
  background: var(--bg-hero);
  padding: 80px 0 88px;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.22;
  pointer-events: none;
}

.hero-section::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(234, 242, 248, 0.92) 0%, rgba(234, 242, 248, 0.80) 50%, rgba(234, 242, 248, 0.40) 100%);
  pointer-events: none;
}

.hero-container {
  position: relative;
  z-index: 2;
}

.hero-text {
  max-width: 620px;
}

.hero-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 18px;
  color: #15202b;
}

.hero-title .highlight {
  color: var(--primary);
  position: relative;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 520px;
}

.hero-ps {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 32px;
  letter-spacing: 0.3px;
}

.hero-ps i {
  color: var(--accent);
  margin-right: 4px;
}

.hero-ps .dot {
  margin: 0 6px;
  color: var(--border);
}

.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-img-wrap {
  position: relative;
  z-index: 2;
}

.hero-img {
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-hover);
  aspect-ratio: 4 / 3;
  width: 100%;
  background: linear-gradient(120deg, #dbe8f2, #f2f7fb);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.hero-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.hero-img:hover img {
  transform: scale(1.02);
}

/* ========== 信任指标条 ========== */
.trust-section {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 48px 0;
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.trust-item {
  text-align: center;
  padding: 16px 8px;
  position: relative;
}

.trust-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 44px;
  background: var(--divider);
}

.trust-num {
  font-size: 34px;
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -1px;
  line-height: 1.2;
  margin-bottom: 4px;
}

.trust-num .accent {
  color: var(--accent);
}

.trust-label {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ========== 卖点三连 ========== */
.features-section {
  background: var(--bg);
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--trans);
  height: 100%;
}

.feature-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(61, 123, 166, 0.35);
  transform: translateY(-3px);
}

.feature-card-lg .feature-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  height: 100%;
}

.feature-img {
  min-height: 240px;
  background: var(--bg-hero);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.feature-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-content {
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.feature-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  transition: all var(--trans);
}

.feature-card:hover .feature-icon {
  background: var(--primary);
  color: #fff;
}

.feature-content h3 {
  font-size: 20px;
  margin-bottom: 10px;
}

.feature-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.feature-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

.feature-link i {
  font-size: 12px;
  transition: transform var(--trans);
  display: inline-block;
}

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

.feature-card-v {
  display: flex;
  flex-direction: column;
}

.feature-card-v .feature-img {
  min-height: 200px;
}

.feature-card-tall .feature-content {
  padding: 28px 24px;
}

.feature-strip {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 28px 32px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: all var(--trans);
}

.feature-strip:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(61, 123, 166, 0.35);
  transform: translateY(-2px);
}

.feature-strip .feature-icon {
  margin-bottom: 0;
  flex-shrink: 0;
}

.feature-strip .feature-content {
  padding: 0;
}

.feature-strip h3 {
  font-size: 18px;
  margin-bottom: 4px;
}

.feature-strip p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* ========== 场景演示 ========== */
.demo-section {
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.browser-window {
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-hover);
  overflow: hidden;
  background: var(--card-bg);
}

.browser-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  background: #f8fafc;
  border-bottom: 1px solid var(--border);
}

.browser-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.browser-dot:nth-child(1) { background: #f1aeb5; }
.browser-dot:nth-child(2) { background: #f0d58c; }
.browser-dot:nth-child(3) { background: #a8d6b0; }

.browser-url {
  margin-left: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 14px;
  font-size: 13px;
  color: var(--text-muted);
  flex: 1;
  max-width: 360px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.browser-body {
  position: relative;
  min-height: 320px;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  padding: 48px 48px;
}

.browser-body::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(245, 247, 250, 0.88);
}

.step-row {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step-item {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 28px 24px;
  text-align: center;
  transition: all var(--trans);
}

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

.step-num {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  background: rgba(176, 138, 63, 0.1);
  border-radius: var(--radius-badge);
  padding: 3px 14px;
  margin-bottom: 14px;
  letter-spacing: 1px;
  text-indent: 1px;
}

.step-item h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 0;
  line-height: 1.6;
}

/* ========== 资讯动态 ========== */
.news-section {
  background: var(--bg);
}

.news-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--trans);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(61, 123, 166, 0.35);
  transform: translateY(-3px);
}

.news-card-img {
  aspect-ratio: 16 / 9;
  background: var(--bg-hero);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.news-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

.news-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.news-badge {
  display: inline-block;
  background: rgba(176, 138, 63, 0.12);
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-badge);
  padding: 3px 12px;
  margin-bottom: 12px;
  align-self: flex-start;
}

.news-card h3 {
  font-size: 17px;
  line-height: 1.45;
  margin-bottom: 10px;
}

.news-card h3 a {
  color: var(--text);
  transition: color var(--trans);
}

.news-card h3 a:hover {
  color: var(--primary);
}

.news-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}

.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.news-meta a {
  color: var(--primary);
  font-weight: 600;
  font-size: 13px;
}

.news-meta a i {
  font-size: 11px;
  transition: transform var(--trans);
  display: inline-block;
}

.news-meta a:hover i {
  transform: translateX(4px);
}

/* 空态 */
.news-empty {
  background: var(--card-bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
  padding: 64px 24px;
  text-align: center;
}

.news-empty i {
  font-size: 40px;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: block;
}

.news-empty p {
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* ========== 社会认同 ========== */
.review-section {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}

.review-quote {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
  position: relative;
  padding: 32px 48px;
  background: var(--bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
}

.review-quote::before {
  content: '\201C';
  font-size: 72px;
  font-family: Georgia, serif;
  color: var(--accent);
  line-height: 1;
  position: absolute;
  top: 8px;
  left: 24px;
  opacity: 0.5;
}

.review-quote p {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text);
  font-weight: 500;
  margin-bottom: 16px;
}

.review-quote .review-author {
  font-size: 14px;
  color: var(--text-muted);
}

.badge-row {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.badge-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-badge);
  padding: 10px 22px;
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--trans);
}

.badge-item i {
  color: var(--accent);
  font-size: 16px;
}

.badge-item:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

/* ========== FAQ ========== */
.faq-section {
  background: var(--bg);
}

.faq-wrap {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow var(--trans);
}

.faq-item:hover {
  box-shadow: var(--shadow-hover);
}

.faq-item .accordion-button {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  padding: 18px 24px;
  background: transparent;
  box-shadow: none;
  border: none;
  outline: none;
  display: flex;
  align-items: center;
  gap: 12px;
}

.faq-item .accordion-button:not(.collapsed) {
  color: var(--primary);
  background: var(--primary-light);
}

.faq-item .accordion-button::after {
  display: none;
}

.faq-item .accordion-button .faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--trans);
}

.faq-item .accordion-button:not(.collapsed) .faq-icon {
  background: var(--primary);
  color: #fff;
}

.faq-item .accordion-body {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ========== 底部固定转化条 ========== */
.fixed-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1040;
  background: #0f1f2e;
  color: #fff;
  min-height: 64px;
  display: flex;
  align-items: center;
  box-shadow: 0 -4px 20px rgba(15, 31, 46, 0.2);
}

.fixed-cta .cta-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
}

.fixed-cta .cta-text {
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fixed-cta .cta-text i {
  color: var(--accent);
  margin-right: 8px;
}

.fixed-cta .cta-close {
  color: rgba(255, 255, 255, 0.6);
  font-size: 18px;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--trans);
  flex-shrink: 0;
}

.fixed-cta .cta-close:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

/* ========== 页脚 ========== */
.site-footer {
  background: #131f2c;
  color: rgba(255, 255, 255, 0.75);
  padding: 56px 0 28px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand .brand-icon {
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

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

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 300px;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

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

.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--trans);
}

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

.footer-contact li {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.footer-contact i {
  color: var(--accent);
  margin-top: 4px;
  width: 16px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 40px;
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 0;
}

.footer-bottom p a {
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom p a:hover {
  color: #fff;
}

/* ========== 响应式 ========== */
@media (max-width: 991.98px) {
  .section {
    padding: 64px 0;
  }

  .hero-section {
    padding: 64px 0 72px;
  }

  .hero-title {
    font-size: 34px;
  }

  .hero-img-wrap {
    margin-top: 32px;
  }

  .navbar-toggler {
    display: flex;
  }

  .navbar-collapse {
    position: fixed;
    top: 92px;
    left: 16px;
    right: 16px;
    z-index: 1050;
    background: var(--card-bg);
    border-radius: var(--radius-nav);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-hover);
    padding: 16px;
  }

  .nav-links {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-link {
    padding: 14px 16px;
  }

  .nav-cta {
    display: none;
  }

  .trust-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px 24px;
  }

  .trust-item:nth-child(2)::after {
    display: none;
  }

  .feature-card-lg .feature-inner {
    grid-template-columns: 1fr;
  }

  .feature-img {
    min-height: 200px;
  }

  .browser-body {
    padding: 32px 24px;
  }

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

  .footer-contact {
    margin-top: 24px;
  }
}

@media (max-width: 767.98px) {
  .hero-title {
    font-size: 32px;
  }

  .hero-btns .btn {
    width: 100%;
  }

  .hero-ps {
    font-size: 12px;
  }

  .trust-num {
    font-size: 28px;
  }

  .feature-content {
    padding: 24px 20px;
  }

  .feature-strip {
    flex-direction: column;
    text-align: center;
    padding: 24px 20px;
  }

  .feature-strip .feature-icon {
    margin-bottom: 8px;
  }

  .review-quote {
    padding: 24px 20px;
  }

  .review-quote::before {
    font-size: 48px;
    top: 0;
    left: 12px;
  }

  .badge-row {
    gap: 12px;
  }

  .badge-item {
    width: 100%;
    justify-content: center;
  }

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

@media (max-width: 575.98px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .section {
    padding: 56px 0;
  }

  .section-head {
    margin-bottom: 32px;
  }

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

  .navbar-card {
    height: 64px;
    padding: 0 14px;
  }

  .brand-text {
    font-size: 15px;
  }

  .brand-icon {
    width: 34px;
    height: 34px;
    font-size: 16px;
  }

  .hero-section {
    padding: 48px 0 56px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 15px;
  }

  .trust-section {
    padding: 36px 0;
  }

  .trust-num {
    font-size: 26px;
  }

  .trust-label {
    font-size: 13px;
  }

  .feature-content h3 {
    font-size: 18px;
  }

  .browser-url {
    max-width: 140px;
  }

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

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

  .news-card h3 {
    font-size: 16px;
  }

  .fixed-cta .cta-text {
    font-size: 13px;
    max-width: 180px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .fixed-cta .btn-accent {
    padding: 8px 18px;
    font-size: 13px;
  }

  .fixed-cta .cta-inner {
    padding: 0 12px;
  }

  .footer {
    padding: 40px 0 20px;
  }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #3D7BA6;
            --primary-dark: #2F648B;
            --primary-light: #EAF2F8;
            --primary-soft: rgba(61, 123, 166, .10);
            --accent: #B08A3F;
            --accent-dark: #96712E;
            --accent-soft: rgba(176, 138, 63, .12);
            --bg: #F5F7FA;
            --card-bg: #FFFFFF;
            --text: #1F2A37;
            --text-secondary: #5A6B7B;
            --text-muted: #98A7B4;
            --border: #E2E8F0;
            --divider: #D6DEE6;
            --success: #2E7D5B;
            --warning: #B26A2E;
            --danger: #C04040;
            --radius-card: 12px;
            --radius-panel: 14px;
            --radius-btn: 8px;
            --radius-badge: 20px;
            --radius-img: 12px;
            --shadow-sm: 0 2px 8px rgba(15, 40, 60, .05), 0 1px 2px rgba(15, 40, 60, .04);
            --shadow-hover: 0 8px 20px rgba(15, 40, 60, .08), 0 2px 4px rgba(15, 40, 60, .05);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --container-max: 1200px;
            --space-section: 96px;
            --space-section-md: 64px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: var(--container-max);
            padding-left: 24px;
            padding-right: 24px;
            margin: 0 auto;
        }
        .section {
            padding: var(--space-section) 0;
        }
        .section-sm {
            padding: var(--space-section-md) 0;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: #15202B;
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 620px;
            margin-bottom: 40px;
        }

        /* ===== 导航面板 ===== */
        .site-header {
            position: relative;
            z-index: 100;
            background: var(--bg);
            padding: 16px 0 8px;
        }
        .site-header .container {
            padding: 0 24px;
        }
        .navbar-card {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-panel);
            box-shadow: var(--shadow-sm);
            padding: 14px 24px;
            min-height: 72px;
            transition: box-shadow .25s ease;
        }
        .navbar-card:hover {
            box-shadow: var(--shadow-hover);
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            text-decoration: none;
            color: var(--text);
        }
        .brand:hover {
            color: var(--text);
        }
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            border-radius: 10px;
            letter-spacing: 0;
        }
        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: .5px;
            line-height: 1.2;
            white-space: nowrap;
        }
        .navbar-toggler {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            width: 42px;
            height: 42px;
            font-size: 18px;
            color: var(--text);
            cursor: pointer;
            transition: all .2s ease;
        }
        .navbar-toggler:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .navbar-collapse {
            display: flex;
            align-items: center;
            flex: 1;
            justify-content: center;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            width: auto;
            min-width: 92px;
            height: 44px;
            padding: 0 14px;
            justify-content: center;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 10px;
            transition: all .2s ease;
            text-decoration: none;
            position: relative;
            border: 1px solid transparent;
        }
        .nav-link i {
            font-size: 16px;
            transition: transform .2s ease;
        }
        .nav-link:hover {
            background: var(--primary-soft);
            color: var(--primary);
            border-color: rgba(61, 123, 166, .15);
        }
        .nav-link:hover i {
            transform: translateY(-2px);
        }
        .nav-link.active {
            background: var(--primary-soft);
            color: var(--primary);
            border-color: rgba(61, 123, 166, .18);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 6px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            flex-shrink: 0;
            white-space: nowrap;
            font-weight: 600;
            box-shadow: var(--shadow-sm);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 500;
            line-height: 1.5;
            border: 1px solid transparent;
            transition: all .2s ease;
            cursor: pointer;
            text-decoration: none;
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 2px 6px rgba(61, 123, 166, .28);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(61, 123, 166, .32);
        }
        .btn-primary:active {
            transform: translateY(0);
            background: #2A5878;
            border-color: #2A5878;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-soft);
            color: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .btn-light {
            background: #fff;
            color: var(--text);
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
        }
        .btn-light:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: rgba(61, 123, 166, .25);
        }
        .btn-lg {
            height: 54px;
            padding: 0 34px;
            font-size: 17px;
            border-radius: 10px;
        }

        /* ===== 分类页横幅 ===== */
        .category-banner {
            position: relative;
            height: 240px;
            border-radius: var(--radius-panel);
            overflow: hidden;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            display: flex;
            align-items: flex-end;
            margin-top: 32px;
            box-shadow: var(--shadow-sm);
        }
        .category-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(255, 255, 255, .94) 0%, rgba(255, 255, 255, .75) 50%, rgba(255, 255, 255, .35) 100%);
            border-radius: var(--radius-panel);
        }
        .category-banner .banner-content {
            position: relative;
            z-index: 2;
            padding: 34px 40px;
            max-width: 680px;
        }
        .category-banner h1 {
            font-size: 34px;
            font-weight: 700;
            color: #15202B;
            line-height: 1.3;
            margin-bottom: 10px;
        }
        .category-banner p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0;
        }

        /* ===== 宽卡 Two Cards ===== */
        .category-cards {
            padding: 64px 0 48px;
        }
        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: box-shadow .25s ease, border-color .25s ease, transform .25s 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) 0%, var(--accent) 100%);
            opacity: 0;
            transition: opacity .25s ease;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(61, 123, 166, .35);
            transform: translateY(-4px);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card .card-img {
            border-radius: calc(var(--radius-img) - 2px);
            overflow: hidden;
            margin-bottom: 20px;
            aspect-ratio: 16/9;
            background: var(--primary-light);
        }
        .feature-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .feature-card .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-soft);
            color: var(--accent-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .feature-card h3 {
            font-size: 21px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 18px;
            flex-grow: 1;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: color .2s ease, gap .2s ease;
        }
        .card-link:hover {
            color: var(--primary-dark);
            gap: 10px;
        }

        /* ===== 单行列表 ===== */
        .category-list {
            padding: 16px 0 56px;
        }
        .list-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 16px 18px;
            margin-bottom: 14px;
            box-shadow: var(--shadow-sm);
            transition: all .22s ease;
        }
        .list-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(61, 123, 166, .3);
            transform: translateX(4px);
        }
        .list-thumb {
            flex-shrink: 0;
            width: 88px;
            height: 64px;
            border-radius: 10px;
            overflow: hidden;
            background: var(--primary-light);
        }
        .list-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .list-body {
            flex: 1;
            min-width: 0;
        }
        .list-body h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .list-body p {
            font-size: 14px;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin: 0;
        }
        .list-date {
            flex-shrink: 0;
            font-size: 13px;
            color: var(--text-muted);
            font-variant-numeric: tabular-nums;
            display: flex;
            align-items: center;
            gap: 6px;
            padding-right: 8px;
        }

        /* ===== 流程步骤 ===== */
        .process-section {
            padding: 56px 0;
            background: var(--primary-light);
            border-radius: 24px;
            margin: 24px 0;
        }
        .process-section .section-title {
            text-align: center;
        }
        .process-section .section-subtitle {
            text-align: center;
            margin-left: auto;
            margin-right: auto;
        }
        .process-wrap {
            display: flex;
            gap: 24px;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 40px;
        }
        .process-step {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            flex: 1 1 240px;
            max-width: 320px;
            text-align: center;
            position: relative;
            transition: transform .25s ease, box-shadow .25s ease;
        }
        .process-step:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            border-radius: 50%;
            margin-bottom: 16px;
            box-shadow: 0 4px 12px rgba(61, 123, 166, .3);
            font-variant-numeric: tabular-nums;
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .step-arrow {
            position: absolute;
            top: 50%;
            right: -22px;
            transform: translateY(-50%);
            color: var(--primary);
            font-size: 20px;
            z-index: 2;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 64px 0 0;
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            margin-bottom: 14px;
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: border-color .2s ease, box-shadow .2s ease;
        }
        .faq-item:hover {
            border-color: rgba(61, 123, 166, .28);
            box-shadow: var(--shadow-hover);
        }
        .faq-item .accordion-button {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 22px;
            background: transparent;
            border: none;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            cursor: pointer;
            min-height: 52px;
            transition: color .2s ease;
        }
        .faq-item .accordion-button:hover {
            color: var(--primary);
        }
        .faq-item .accordion-button .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-soft);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: transform .3s ease, background .2s ease;
            flex-shrink: 0;
        }
        .faq-item .accordion-button[aria-expanded="true"] .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-item .accordion-collapse {
            border-top: 1px solid var(--border);
        }
        .faq-item .accordion-body {
            padding: 16px 22px;
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-secondary);
            background: #FBFCFE;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 68px 0;
            background: #0F1F2E;
            border-radius: 24px;
            margin: 64px 0 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: .12;
        }
        .cta-section .cta-inner {
            position: relative;
            z-index: 2;
            padding: 24px;
        }
        .cta-section h2 {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, .75);
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn-primary {
            background: var(--accent);
            border-color: var(--accent);
            box-shadow: 0 4px 16px rgba(176, 138, 63, .35);
        }
        .cta-section .btn-primary:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
        }
        .cta-section .btn-outline {
            border-color: rgba(255, 255, 255, .6);
            color: #fff;
            background: transparent;
        }
        .cta-section .btn-outline:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
            color: #fff;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0F1F2E;
            color: rgba(255, 255, 255, .75);
            padding: 64px 0 0;
            margin-top: 64px;
        }
        .site-footer .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .site-footer .footer-brand .brand-icon {
            background: var(--primary);
        }
        .site-footer .footer-brand .brand-text {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .55);
            max-width: 320px;
            margin-bottom: 20px;
        }
        .site-footer h4.footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: .5px;
        }
        .footer-links,
        .footer-contact {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-links li,
        .footer-contact li {
            margin-bottom: 10px;
            font-size: 14px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, .6);
            text-decoration: none;
            transition: color .2s ease, padding-left .2s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, .6);
        }
        .footer-contact i {
            width: 18px;
            text-align: center;
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 20px 0;
            margin-top: 40px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
        }
        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
            margin: 0;
        }

        /* ===== 底部固定转化条 ===== */
        .bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: #0F1F2E;
            padding: 14px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            box-shadow: 0 -4px 20px rgba(0, 0, 0, .15);
            transition: transform .3s ease;
        }
        .bottom-bar.hidden {
            transform: translateY(100%);
        }
        .bottom-bar-text {
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, .9);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .bottom-bar .btn {
            height: 44px;
            flex-shrink: 0;
            background: var(--accent);
            border-color: var(--accent);
            font-weight: 600;
        }
        .bottom-bar .btn:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            transform: translateY(-2px);
        }
        .bottom-bar-close {
            background: none;
            border: none;
            color: rgba(255, 255, 255, .5);
            font-size: 18px;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 6px;
            transition: all .2s ease;
        }
        .bottom-bar-close:hover {
            color: #fff;
            background: rgba(255, 255, 255, .1);
        }
        body {
            padding-bottom: 80px;
        }

        /* ===== 焦点状态 ===== */
        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            :root {
                --space-section: 72px;
            }
            .navbar-card {
                flex-wrap: wrap;
            }
            .navbar-toggler {
                display: inline-flex;
                align-items: center;
                justify-content: center;
                order: 3;
            }
            .navbar-collapse {
                order: 4;
                flex-basis: 100%;
                justify-content: flex-start;
            }
            .nav-links {
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                gap: 4px;
                padding: 12px 0 4px;
            }
            .nav-link {
                width: 100%;
                justify-content: flex-start;
                padding: 0 14px;
                height: 46px;
            }
            .nav-cta {
                margin-left: auto;
                order: 2;
            }
            .category-banner {
                height: auto;
                min-height: 200px;
            }
            .category-banner .banner-content {
                padding: 28px 24px;
            }
            .category-banner h1 {
                font-size: 28px;
            }
            .step-arrow {
                display: none;
            }
            .process-wrap {
                gap: 16px;
            }
            .process-step {
                flex: 1 1 100%;
                max-width: 100%;
            }
        }

        @media (max-width: 767.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-title {
                font-size: 26px;
            }
            .list-item {
                flex-wrap: wrap;
                gap: 12px;
                padding: 14px;
            }
            .list-thumb {
                width: 72px;
                height: 56px;
            }
            .list-date {
                display: none;
            }
            .bottom-bar {
                padding: 10px 16px;
            }
            .bottom-bar-text {
                font-size: 14px;
                max-width: 160px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 575.98px) {
            .brand-text {
                font-size: 18px;
            }
            .navbar-card {
                padding: 12px 16px;
                gap: 12px;
            }
            .category-banner {
                margin-top: 20px;
                min-height: 170px;
                border-radius: var(--radius-card);
            }
            .category-banner .banner-content {
                padding: 22px 18px;
            }
            .category-banner h1 {
                font-size: 24px;
            }
            .category-banner p {
                font-size: 14px;
            }
            .feature-card {
                padding: 18px;
            }
            .feature-card h3 {
                font-size: 18px;
            }
            .list-body h4 {
                font-size: 15px;
            }
            .cta-section {
                padding: 48px 20px;
                border-radius: 16px;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .bottom-bar-text {
                max-width: 110px;
                font-size: 13px;
            }
            .bottom-bar .btn {
                padding: 0 18px;
            }
        }

/* roulang page: article */
:root {
            --primary: #3D7BA6;
            --primary-dark: #326A91;
            --primary-lighter: #EAF2F8;
            --accent: #B08A3F;
            --accent-dark: #96702E;
            --bg: #F5F7FA;
            --card-bg: #FFFFFF;
            --text-main: #1F2A37;
            --text-sub: #5A6B7B;
            --text-muted: #98A7B4;
            --border-color: #E2E8F0;
            --divider-color: #D6DEE6;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-nav: 14px;
            --shadow-base: 0 2px 8px rgba(15, 40, 60, .05), 0 1px 2px rgba(15, 40, 60, .04);
            --shadow-hover: 0 8px 20px rgba(15, 40, 60, .08), 0 2px 4px rgba(15, 40, 60, .05);
            --footer-bg: #0F1F2E;
        }

        * {
            box-sizing: border-box;
        }

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

        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.8;
            font-size: 16px;
            padding-bottom: 72px;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }

        a:hover {
            color: var(--primary-dark);
        }

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: #15202B;
            font-weight: 700;
            line-height: 1.3;
        }

        /* ========== Header & Nav ========== */
        .site-header {
            position: sticky;
            top: 12px;
            z-index: 1050;
            padding: 8px 0 4px;
        }

        .navbar-card {
            background: rgba(255, 255, 255, .96);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-nav);
            box-shadow: var(--shadow-base);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 12px 20px;
            min-height: 72px;
            position: relative;
            transition: box-shadow .2s ease;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            color: #fff;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            font-weight: 700;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: #15202B;
            letter-spacing: .01em;
            white-space: nowrap;
        }

        .navbar-toggler {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border: 1px solid var(--border-color);
            border-radius: 10px;
            background: #fff;
            color: var(--text-main);
            font-size: 20px;
            cursor: pointer;
            padding: 0;
            transition: all .2s ease;
        }

        .navbar-toggler:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

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

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 44px;
            padding: 0 16px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            background: transparent;
            border: 1px solid transparent;
            transition: all .2s ease;
            white-space: nowrap;
        }

        .nav-link i {
            font-size: 16px;
            color: var(--text-muted);
            transition: color .2s, transform .2s;
        }

        .nav-link:hover {
            background: rgba(61, 123, 166, .08);
            color: var(--primary-dark);
        }

        .nav-link:hover i {
            color: var(--primary);
            transform: translateY(-2px);
        }

        .nav-link.active {
            background: var(--primary-lighter);
            color: var(--primary-dark);
            border-color: rgba(61, 123, 166, .18);
        }

        .nav-link.active i {
            color: var(--primary);
        }

        .nav-cta {
            flex-shrink: 0;
            margin-left: 4px;
        }

        /* ========== Buttons ========== */
        .btn {
            border-radius: var(--radius-btn);
            font-weight: 600;
            border: none;
            transition: all .2s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 48px;
            padding: 0 22px;
            font-size: 15px;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(61, 123, 166, .22);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-soft {
            background: var(--primary-lighter);
            color: var(--primary-dark);
            border: 1px solid rgba(61, 123, 166, .14);
        }

        .btn-soft:hover {
            background: rgba(61, 123, 166, .16);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-wrap {
            margin: 32px 0 22px;
        }

        .breadcrumb-list {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            padding: 0;
            margin: 0;
            list-style: none;
            font-size: 14px;
            color: var(--text-muted);
        }

        .breadcrumb-list a {
            color: var(--text-sub);
        }

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

        .breadcrumb-list .dot {
            color: #B9C3CE;
            font-weight: 300;
        }

        .breadcrumb-list .cur {
            color: var(--text-sub);
            font-weight: 500;
            max-width: 360px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ========== Article Main ========== */
        .article-main {
            padding-bottom: 20px;
        }

        .article-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-base);
            padding: 52px 60px;
            margin-bottom: 64px;
        }

        .article-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 36px;
        }

        .article-cate {
            display: inline-block;
            background: rgba(176, 138, 63, .12);
            color: var(--accent-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
        }

        .article-title {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
            color: #15202B;
        }

        .article-meta {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--text-muted);
            font-size: 14px;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-variant-numeric: tabular-nums;
        }

        .article-meta i {
            color: var(--primary);
            font-size: 15px;
        }

        .article-content {
            max-width: 720px;
            margin: 0 auto;
            font-size: 16px;
            color: var(--text-main);
        }

        /* ========== Article Typography ========== */
        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: #15202B;
            margin: 40px 0 16px;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: #15202B;
            margin: 30px 0 12px;
        }

        .article-content p {
            margin-bottom: 1.2em;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: #F8FAFC;
            padding: 18px 22px;
            border-radius: 0 10px 10px 0;
            color: var(--text-sub);
            margin: 28px 0;
        }

        .article-content img {
            border-radius: 12px;
            margin: 28px auto;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 28px 0;
            font-size: 15px;
        }

        .article-content th,
        .article-content td {
            padding: 12px 14px;
            border-bottom: 1px solid var(--border-color);
            text-align: left;
        }

        .article-content th {
            background: #F8FAFC;
            color: #15202B;
            font-weight: 600;
        }

        .article-content tr:last-child td {
            border-bottom: none;
        }

        .article-content code {
            background: #F1F3F5;
            border-radius: 4px;
            padding: 2px 6px;
            font-size: 14px;
            color: #C04040;
        }

        .article-content pre {
            background: #F8FAFC;
            border: 1px solid var(--border-color);
            border-radius: 10px;
            padding: 20px;
            overflow-x: auto;
            line-height: 1.6;
        }

        .article-content pre code {
            background: transparent;
            padding: 0;
            color: inherit;
            font-size: 14px;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 1.2em 1.3em;
        }

        .article-content li {
            margin-bottom: 6px;
        }

        .article-notfound {
            text-align: center;
            padding: 70px 24px;
            border: 1px dashed var(--border-color);
            border-radius: 12px;
            background: #FBFCFE;
        }

        .article-notfound i {
            font-size: 44px;
            color: var(--text-muted);
            margin-bottom: 14px;
        }

        .article-notfound h2 {
            font-size: 24px;
            margin-bottom: 8px;
        }

        .article-notfound p {
            color: var(--text-sub);
            margin-bottom: 20px;
        }

        /* ========== Related ========== */
        .related-section {
            margin: 16px 0 72px;
        }

        .related-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 26px;
        }

        .related-head h2 {
            font-size: 26px;
            font-weight: 700;
            margin: 0;
        }

        .related-more {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
        }

        .related-more i {
            transition: transform .2s ease;
        }

        .related-more:hover i {
            transform: translateX(3px);
        }

        .related-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            box-shadow: var(--shadow-base);
            overflow: hidden;
            height: 100%;
            transition: all .25s ease;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(61, 123, 166, .4);
            transform: translateY(-3px);
        }

        .related-cover {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--primary-lighter);
        }

        .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .cover-placeholder {
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 32px;
        }

        .related-body {
            padding: 20px 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .tag {
            display: inline-block;
            background: rgba(176, 138, 63, .12);
            color: var(--accent-dark);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .related-body h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.55;
            margin-bottom: 10px;
            color: #15202B;
        }

        .related-body h3 a {
            color: #15202B;
            transition: color .2s ease;
        }

        .related-body h3 a:hover {
            color: var(--primary);
        }

        .related-date {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: auto;
            font-variant-numeric: tabular-nums;
        }

        /* ========== Sticky Bar ========== */
        .sticky-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1040;
            background: var(--footer-bg);
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 10px 0;
        }

        .sticky-bar-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            position: relative;
        }

        .sticky-slogan {
            color: rgba(255, 255, 255, .88);
            font-size: 15px;
            margin: 0;
            font-weight: 500;
        }

        .sticky-btn {
            background: #fff;
            color: #0F1F2E;
            height: 40px;
            padding: 0 18px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: none;
            cursor: pointer;
            transition: all .2s ease;
        }

        .sticky-btn:hover {
            background: rgba(255, 255, 255, .88);
            color: #0F1F2E;
            transform: translateY(-1px);
        }

        .sticky-close {
            position: absolute;
            right: -6px;
            top: -18px;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: none;
            background: rgba(255, 255, 255, .12);
            color: rgba(255, 255, 255, .8);
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all .2s ease;
        }

        .sticky-close:hover {
            background: rgba(255, 255, 255, .24);
            color: #fff;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, .72);
            padding: 64px 0 0;
            margin-top: 40px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .brand-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            color: #fff;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
        }

        .footer-brand .brand-text {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
        }

        .footer-desc {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .6);
            max-width: 330px;
            margin-bottom: 0;
        }

        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 26px;
            height: 2px;
            background: var(--accent);
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            gap: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, .64);
            font-size: 14px;
            transition: all .2s ease;
        }

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

        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            gap: 12px;
            font-size: 14px;
            color: rgba(255, 255, 255, .64);
        }

        .footer-contact i {
            color: var(--accent);
            margin-right: 6px;
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            margin-top: 48px;
            padding: 18px 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            color: rgba(255, 255, 255, .5);
            font-size: 13px;
        }

        .footer-bottom p {
            margin: 0;
        }

        /* ========== Responsive ========== */
        @media (max-width: 991.98px) {
            .navbar-card {
                flex-wrap: wrap;
                align-items: center;
            }

            .navbar-collapse {
                order: 3;
                flex-basis: 100%;
                margin-top: 8px;
            }

            .nav-links {
                display: flex;
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
                padding: 12px 0 4px;
            }

            .nav-link {
                height: 46px;
                padding: 0 14px;
            }

            .article-card {
                padding: 40px 32px;
            }

            .article-title {
                font-size: 30px;
            }

            .article-content {
                font-size: 16px;
            }
        }

        @media (max-width: 767.98px) {
            .article-card {
                padding: 30px 20px;
            }

            .article-title {
                font-size: 26px;
            }

            .article-meta {
                gap: 14px;
                font-size: 13px;
            }

            .related-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .site-header {
                top: 8px;
            }

            .navbar-card {
                padding: 10px 14px;
            }

            .brand-text {
                font-size: 17px;
            }

            .brand-icon {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }

            .nav-cta {
                font-size: 14px;
                padding: 0 14px;
                height: 42px;
            }

            .article-card {
                padding: 24px 16px;
                border-radius: 10px;
                margin-bottom: 40px;
            }

            .article-title {
                font-size: 23px;
            }

            .article-meta {
                gap: 10px 14px;
                justify-content: flex-start;
            }

            .article-content {
                font-size: 16px;
                line-height: 1.85;
            }

            .article-content h2 {
                font-size: 22px;
            }

            .article-content h3 {
                font-size: 18px;
            }

            .breadcrumb-list .cur {
                max-width: 180px;
            }

            .related-section {
                margin-bottom: 48px;
            }

            .sticky-bar-inner {
                padding: 0 16px;
            }

            .sticky-slogan {
                display: none;
            }

            .sticky-bar-inner {
                justify-content: flex-end;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 4px;
            }
        }