/* roulang page: index */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --dark-bg: #0b1220;
  --dark-soft: #111c30;
  --light-bg: #f6f8fc;
  --white: #ffffff;
  --text: #1e293b;
  --text-weak: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 6px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.14);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 76px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  line-height: 1.7;
  color: var(--text);
  background: var(--light-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

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

/* ========== 导航 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
  border-bottom-color: rgba(226, 232, 240, 0.7);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 2px;
  line-height: 1;
}

.logo span {
  color: var(--primary);
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-link {
  display: inline-block;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-weak);
  border-radius: 999px;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(37, 99, 235, 0.06);
}

.nav-link.active {
  color: var(--primary-dark);
  background: rgba(37, 99, 235, 0.1);
  font-weight: 600;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  color: #fff;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(37, 99, 235, 0.4);
  color: #fff;
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.btn-outline {
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.7);
  color: #fff;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
}

.btn-lg {
  padding: 15px 40px;
  font-size: 16px;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 4px;
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 140px 0 100px;
  background: linear-gradient(135deg, rgba(11, 18, 32, 0.92) 0%, rgba(15, 23, 42, 0.82) 60%, rgba(30, 27, 75, 0.85) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -15%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 860px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: #e2e8f0;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.hero-badge i {
  color: var(--accent);
}

.hero h1 {
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #ffffff 40%, #93c5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--accent), #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 18px;
  color: #cbd5e1;
  max-width: 620px;
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 48px;
}

.hero-meta {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #e2e8f0;
  font-size: 14px;
}

.hero-meta-item i {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  color: var(--accent);
  font-size: 16px;
}

/* ========== 通用section ========== */
.section {
  padding: 100px 0;
}

.section-alt {
  background: var(--white);
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.16);
  color: var(--primary);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.section-head p {
  color: var(--text-weak);
  font-size: 16px;
  line-height: 1.7;
}

/* ========== About 核心说明 ========== */
.about-section {
  background: var(--white);
  position: relative;
  overflow: hidden;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-visual {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-visual img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.about-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(11, 18, 32, 0.5));
}

.about-visual-tag {
  position: absolute;
  left: 20px;
  bottom: 20px;
  z-index: 2;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 12px;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
}

.about-content .content-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  color: var(--accent-dark);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}

.about-content h2 {
  font-size: 32px;
  line-height: 1.35;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text);
  letter-spacing: -0.5px;
}

.about-content p {
  color: var(--text-weak);
  font-size: 16px;
  line-height: 1.9;
  margin-bottom: 16px;
}

.about-list {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-list-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.about-list-item i {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  color: #fff;
  border-radius: 12px;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.about-list-item div h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.about-list-item div p {
  font-size: 14px;
  color: var(--text-weak);
  margin: 0;
  line-height: 1.6;
}

/* ========== 分类入口 ========== */
.categories-section {
  background: var(--light-bg);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.category-card {
  position: relative;
  background: var(--white);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(226, 232, 240, 0.6);
}

.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.2);
}

.category-img {
  height: 220px;
  overflow: hidden;
  position: relative;
}

.category-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.category-card:hover .category-img img {
  transform: scale(1.06);
}

.category-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(11, 18, 32, 0.35));
}

.category-body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.category-body h3 {
  font-size: 21px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}

.category-body p {
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.7;
  flex: 1;
}

.category-link {
  margin-top: 20px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
}

.category-link:hover {
  gap: 14px;
  color: var(--primary-dark);
}

.category-link i {
  font-size: 14px;
}

/* ========== 资讯列表 ========== */
.news-section {
  background: var(--white);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.news-card {
  background: var(--white);
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.2);
}

.news-thumb {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: #eef2f7;
}

.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.news-card:hover .news-thumb img {
  transform: scale(1.06);
}

.news-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(11, 18, 32, 0.25));
}

.news-cat {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  padding: 5px 14px;
  background: rgba(37, 99, 235, 0.9);
  color: #fff;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  backdrop-filter: blur(6px);
}

.news-body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-body p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}

.news-date {
  font-size: 13px;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 6px;
}

.news-date i {
  color: var(--primary);
}

.empty-tip {
  grid-column: 1 / -1;
  padding: 60px 20px;
  text-align: center;
  background: var(--light-bg);
  border-radius: 18px;
  border: 1px dashed var(--border);
}

.empty-tip i {
  font-size: 40px;
  color: var(--text-light);
  margin-bottom: 16px;
}

.empty-tip p {
  color: var(--text-weak);
  font-size: 15px;
}

/* ========== 数据板块 ========== */
.stats-section {
  background: linear-gradient(135deg, #0b1220 0%, #111c30 60%, #16213e 100%);
  position: relative;
  padding: 90px 0;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.2) 0%, transparent 60%);
  border-radius: 50%;
  pointer-events: none;
}

.stats-section .section-head h2 {
  color: #fff;
}

.stats-section .section-head p {
  color: var(--text-light);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
  z-index: 2;
}

.stat-item {
  text-align: center;
  padding: 40px 24px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.09);
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.16);
}

.stat-number {
  display: block;
  font-size: 40px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
  letter-spacing: -1px;
  line-height: 1;
}

.stat-number em {
  font-style: normal;
  color: var(--accent);
}

.stat-label {
  font-size: 14px;
  color: #94a3b8;
  font-weight: 500;
  letter-spacing: 1px;
}

/* ========== 流程板块 ========== */
.process-section {
  background: var(--light-bg);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  position: relative;
  counter-reset: process;
}

.process-grid::before {
  content: '';
  position: absolute;
  top: 50px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, rgba(37, 99, 235, 0.2), rgba(37, 99, 235, 0.6), rgba(37, 99, 235, 0.2));
  z-index: 0;
}

.process-item {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 20px;
}

.process-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: #fff;
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.25);
  position: relative;
}

.process-icon::after {
  content: counter(process);
  counter-increment: process;
  position: absolute;
  top: -8px;
  right: -8px;
  width: 28px;
  height: 28px;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid #fff;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.process-item h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.process-item p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.6;
  max-width: 220px;
  margin: 0 auto;
}

/* ========== 特色优势 ========== */
.features-section {
  background: var(--white);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.feature-card {
  padding: 36px 28px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 20px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), #4f46e5, var(--accent));
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: rgba(37, 99, 235, 0.08);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 20px;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  color: #fff;
  transform: rotate(-6deg);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  margin-bottom: 0;
}

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

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(37, 99, 235, 0.25);
}

.faq-question {
  padding: 22px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  gap: 20px;
}

.faq-question h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  flex: 1;
}

.faq-question .faq-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  background: rgba(37, 99, 235, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 14px;
  transition: var(--transition);
}

.faq-item.active .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer-inner {
  padding: 0 28px 24px;
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 18px;
  margin-top: 0;
}

/* ========== CTA ========== */
.cta-section {
  position: relative;
  padding: 120px 0;
  background: linear-gradient(135deg, rgba(11, 18, 32, 0.95), rgba(30, 27, 75, 0.88)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  background-attachment: fixed;
  color: #fff;
  text-align: center;
}

.cta-section h2 {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 800;
  max-width: 640px;
  margin: 0 auto 20px;
  line-height: 1.3;
  letter-spacing: -0.5px;
}

.cta-section p {
  color: #cbd5e1;
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-note {
  margin-top: 24px;
  font-size: 13px;
  color: #94a3b8;
}

/* ========== 页脚 ========== */
.footer {
  background: #0b1220;
  color: #94a3b8;
  padding: 80px 0 0;
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.5), rgba(245, 158, 11, 0.5), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  max-width: 300px;
  color: var(--text-light);
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul li a {
  color: var(--text-light);
  font-size: 14px;
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: #64748b;
}

.footer-bottom a {
  color: #94a3b8;
}

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

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .about-grid {
    gap: 40px;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .process-grid::before {
    display: none;
  }
  
  .hero {
    min-height: 80vh;
    padding: 120px 0 80px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  
  .section {
    padding: 64px 0;
  }
  
  .section-head {
    margin-bottom: 40px;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 32px rgba(15, 23, 42, 0.1);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    z-index: 999;
  }
  
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-link {
    display: block;
    width: 100%;
    padding: 14px 16px;
    border-radius: 12px;
    font-size: 16px;
  }
  
  .header-actions .btn-sm {
    display: none;
  }
  
  .hero {
    padding: 110px 0 60px;
    min-height: auto;
  }
  
  .hero h1 {
    font-size: 36px;
  }
  
  .hero-desc {
    font-size: 16px;
    margin-bottom: 28px;
  }
  
  .hero-meta {
    gap: 16px;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .about-visual img {
    height: 300px;
  }
  
  .categories-grid {
    grid-template-columns: 1fr;
  }
  
  .news-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  
  .stat-item {
    padding: 28px 16px;
  }
  
  .stat-number {
    font-size: 32px;
  }
  
  .process-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .cta-section {
    padding: 80px 0;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  
  .hero h1 {
    font-size: 30px;
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .process-grid {
    grid-template-columns: 1fr;
  }
  
  .stat-number {
    font-size: 28px;
  }
  
  .news-body {
    padding: 18px;
  }
  
  .faq-question {
    padding: 18px 20px;
  }
  
  .category-body {
    padding: 22px;
  }
  
  .footer {
    padding-top: 56px;
  }
  
  .footer-bottom {
    padding: 18px 16px;
    font-size: 12px;
  }
}

/* ========== 焦点可访问性 ========== */
a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.4);
  outline-offset: 3px;
}

/* ========== 通用动画 ========== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-inner {
  animation: fadeInUp 0.8s ease forwards;
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 8px;
}

::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

/* roulang page: article */
:root {
  --primary: #0B132B;
  --primary-2: #1C2541;
  --primary-3: #274060;
  --accent: #F59E0B;
  --accent-2: #38BDF8;
  --bg: #F4F6FB;
  --surface: #FFFFFF;
  --surface-2: #EEF1F8;
  --text: #0F172A;
  --text-body: #334155;
  --muted: #64748B;
  --border: #E2E8F0;
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 4px 12px rgba(15, 23, 42, .06);
  --shadow-md: 0 12px 30px rgba(15, 23, 42, .08);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, .13);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent); }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.45em;
  line-height: 1.3;
  color: var(--text);
  font-weight: 700;
}
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.25em; }
a:focus-visible, button:focus-visible, .btn:focus-visible, .nav-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

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

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(11, 19, 43, .62);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  transition: background .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.site-header.scrolled {
  background: rgba(11, 19, 43, .92);
  border-bottom-color: rgba(255, 255, 255, .1);
  box-shadow: 0 10px 30px rgba(11, 19, 43, .22);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 24px;
}
.logo {
  font-size: 26px;
  font-weight: 800;
  color: #fff;
  letter-spacing: .5px;
  line-height: 1;
  text-decoration: none;
}
.logo span { color: var(--accent); }
.logo:hover { color: #fff; }
.main-nav {
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav-link {
  color: rgba(255, 255, 255, .82);
  font-weight: 500;
  font-size: 15px;
  position: relative;
  padding: 8px 2px;
  text-decoration: none;
  transition: color .25s;
  letter-spacing: .2px;
}
.nav-link:hover { color: #fff; }
.nav-link::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transition: width .28s ease;
}
.nav-link.active { color: #fff; }
.nav-link.active::after, .nav-link:hover::after { width: 100%; }
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  line-height: 1;
  border: 1px solid transparent;
  transition: all .25s ease;
  cursor: pointer;
  color: var(--text);
  text-decoration: none;
}
.btn-sm { padding: 9px 18px; font-size: 13px; }
.btn-lg { padding: 15px 34px; font-size: 15px; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #F59E0B);
  color: #0B132B;
  box-shadow: 0 4px 18px rgba(245, 158, 11, .35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(245, 158, 11, .45);
  color: #0B132B;
}
.btn-ghost {
  background: rgba(255, 255, 255, .06);
  border-color: rgba(255, 255, 255, .32);
  color: #fff;
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn-dark {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-dark:hover {
  background: var(--primary-2);
  color: #fff;
  transform: translateY(-2px);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: rgba(255, 255, 255, .08);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, .12);
}
.nav-toggle span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: #fff;
  transition: all .3s ease;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.page-hero {
  position: relative;
  min-height: 360px;
  display: flex;
  align-items: flex-end;
  padding: 140px 0 64px;
  background: url('/assets/images/backpic/back-1.png') center / cover no-repeat, var(--primary);
  color: #fff;
  isolation: isolate;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(11, 19, 43, .94) 0%, rgba(11, 19, 43, .68) 52%, rgba(11, 19, 43, .38) 100%);
  z-index: -1;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  margin-bottom: 18px;
  color: rgba(255, 255, 255, .68);
}
.breadcrumb a { color: rgba(255, 255, 255, .72); text-decoration: none; transition: color .2s; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: rgba(255, 255, 255, .38); }
.breadcrumb .current { color: #fff; font-weight: 500; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .18);
  color: rgba(255, 255, 255, .92);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .4px;
  margin-bottom: 18px;
  backdrop-filter: blur(8px);
}
.hero-badge i { color: var(--accent); }
.page-hero h1 {
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.22;
  max-width: 860px;
  margin: 0 0 20px;
  color: #fff;
  letter-spacing: .5px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 14px;
  color: rgba(255, 255, 255, .75);
}
.hero-meta span { display: inline-flex; align-items: center; gap: 7px; }
.hero-meta i { color: var(--accent); }

.article-shell { padding: 72px 0 64px; }
.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 40px;
  align-items: start;
}
.article-main {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 48px 52px;
  min-height: 420px;
}
.article-body { color: var(--text-body); font-size: 16px; line-height: 1.9; }
.article-body h2,
.article-body h3,
.article-body h4 {
  margin: 1.4em 0 .6em;
  color: var(--text);
}
.article-body h2 { font-size: 26px; }
.article-body h3 { font-size: 21px; }
.article-body p { margin: 0 0 1.2em; }
.article-body ul,
.article-body ol { margin: 0 0 1.2em; padding-left: 1.5em; }
.article-body li { margin-bottom: .35em; }
.article-body img {
  border-radius: var(--radius);
  margin: 20px 0;
  box-shadow: var(--shadow-md);
}
.article-body blockquote {
  margin: 24px 0;
  padding: 18px 22px;
  border-left: 4px solid var(--accent);
  background: var(--surface-2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-body);
  font-style: italic;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}
.article-body table th,
.article-body table td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.article-body table th { background: var(--surface-2); font-weight: 600; color: var(--text); }
.article-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 14px;
}
.article-tags > span:first-child { color: var(--muted); display: inline-flex; align-items: center; gap: 6px; }
.article-tags .tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-body);
  font-size: 13px;
  font-weight: 500;
}
.article-missing {
  text-align: center;
  padding: 60px 20px;
}
.missing-icon {
  width: 88px;
  height: 88px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--surface-2), var(--bg));
  border: 1px solid var(--border);
  font-size: 34px;
  color: var(--muted);
  box-shadow: var(--shadow-sm);
}
.article-missing h2 { font-size: 26px; margin-bottom: 10px; }
.article-missing p { color: var(--muted); margin-bottom: 28px; }

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.side-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  box-shadow: var(--shadow-sm);
}
.side-card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.side-card-title i { color: var(--accent); font-size: 18px; }
.side-stat-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.side-stat-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 14px;
}
.side-stat-list li:last-child { border-bottom: none; }
.side-stat-list span { color: var(--muted); }
.side-stat-list strong { color: var(--text); font-size: 18px; font-weight: 700; }
.side-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
.side-steps li {
  counter-increment: step;
  position: relative;
  padding: 10px 0 10px 48px;
  font-size: 14px;
  color: var(--text-body);
  border-bottom: 1px dashed var(--border);
}
.side-steps li:last-child { border-bottom: none; }
.side-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0; top: 9px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-3));
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  font-family: 'SF Mono', 'JetBrains Mono', Consolas, monospace;
  box-shadow: 0 4px 10px rgba(11, 19, 43, .2);
}
.side-cats { display: flex; flex-direction: column; gap: 12px; }
.side-cat {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  transition: all .22s ease;
  text-decoration: none;
}
.side-cat i:first-child { color: var(--accent); font-size: 18px; width: 22px; }
.side-cat i:last-child { margin-left: auto; color: var(--muted); transition: transform .22s; }
.side-cat:hover {
  border-color: var(--accent);
  background: #FFF8E8;
  transform: translateX(4px);
}
.side-cat:hover i:last-child { transform: translateX(3px); color: var(--accent); }

.stats-section {
  position: relative;
  padding: 80px 0;
  background: var(--primary);
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  color: #fff;
  isolation: isolate;
}
.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(11, 19, 43, .88);
  z-index: -1;
}
.section-head { margin-bottom: 44px; }
.section-head.centered { text-align: center; }
.section-kicker {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(245, 158, 11, .14);
  border: 1px solid rgba(245, 158, 11, .4);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.stats-section .section-head h2 { color: #fff; font-size: clamp(24px, 2.6vw, 32px); }
.stats-section .section-head p { color: rgba(255, 255, 255, .72); max-width: 600px; margin: 10px auto 0; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  text-align: center;
  padding: 34px 20px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  backdrop-filter: blur(10px);
  transition: transform .25s, border-color .25s, background .25s;
}
.stat-card:hover {
  transform: translateY(-6px);
  border-color: rgba(245, 158, 11, .55);
  background: rgba(255, 255, 255, .1);
}
.stat-num {
  font-size: clamp(32px, 3.4vw, 48px);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  font-family: 'SF Mono', 'JetBrains Mono', Consolas, monospace;
  margin-bottom: 8px;
}
.stat-num span { color: var(--accent); font-size: .55em; margin-left: 2px; }
.stat-label {
  color: rgba(255, 255, 255, .7);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 1px;
}

.feature-section { padding: 80px 0; }
.section-head h2 { font-size: clamp(24px, 2.6vw, 32px); }
.section-head p { color: var(--muted); max-width: 620px; margin: 10px 0 0; }
.section-head.centered p { margin-left: auto; margin-right: auto; }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .28s ease, box-shadow .28s ease;
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
.feature-img {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.feature-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.feature-card:hover .feature-img img { transform: scale(1.06); }
.feature-index {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(11, 19, 43, .65);
  backdrop-filter: blur(8px);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  font-family: 'SF Mono', 'JetBrains Mono', Consolas, monospace;
  border: 1px solid rgba(255, 255, 255, .14);
}
.feature-body { padding: 24px 28px 26px; }
.feature-body h3 { font-size: 18px; margin-bottom: 8px; }
.feature-body p { font-size: 14px; color: var(--muted); margin: 0; line-height: 1.8; }

.faq-section { padding: 80px 0; background: var(--surface-2); }
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .25s, border-color .25s;
}
.faq-item.active {
  border-color: rgba(245, 158, 11, .5);
  box-shadow: 0 12px 32px rgba(15, 23, 42, .08);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: color .2s;
}
.faq-q i {
  color: var(--muted);
  transition: transform .3s ease, color .3s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-q { color: var(--accent); }
.faq-item.active .faq-q i { transform: rotate(180deg); color: var(--accent); }
.faq-a {
  display: none;
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.8;
}
.faq-item.active .faq-a { display: block; }
.faq-a p { margin: 0; }

.cta-section { padding: 80px 0; }
.cta-panel {
  position: relative;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-3) 65%, rgba(38, 64, 96, .9) 100%);
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  color: #fff;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.cta-panel::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(245, 158, 11, .18) 0%, transparent 70%);
  pointer-events: none;
}
.cta-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(245, 158, 11, .16);
  border: 1px solid rgba(245, 158, 11, .45);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 18px;
}
.cta-panel h2 {
  color: #fff;
  font-size: clamp(24px, 2.8vw, 34px);
  margin-bottom: 12px;
}
.cta-panel p {
  color: rgba(255, 255, 255, .78);
  font-size: 15px;
  margin-bottom: 30px;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.footer {
  background: var(--primary);
  color: rgba(255, 255, 255, .75);
  padding-top: 60px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer .logo { font-size: 24px; }
.footer-brand p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .6);
  max-width: 340px;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 18px;
  letter-spacing: .5px;
}
.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  color: rgba(255, 255, 255, .65);
  font-size: 14px;
  text-decoration: none;
  transition: color .2s, padding-left .2s;
}
.footer-col ul a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  margin: 0;
  font-size: 13px;
  color: rgba(255, 255, 255, .5);
}
.footer-bottom a { color: rgba(255, 255, 255, .7); }
.footer-bottom a:hover { color: var(--accent); }

html { scroll-behavior: smooth; }
body.nav-open { overflow: hidden; }

@media (max-width: 1024px) {
  .article-grid { grid-template-columns: 1fr; gap: 32px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 78%;
    max-width: 360px;
    height: 100vh;
    background: linear-gradient(160deg, var(--primary), var(--primary-2));
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 100px 36px 40px;
    gap: 24px;
    transition: right .35s ease;
    box-shadow: -20px 0 50px rgba(11, 19, 43, .35);
    border-left: 1px solid rgba(255, 255, 255, .1);
    z-index: 99;
  }
  .main-nav.open { right: 0; }
  .nav-toggle { display: flex; }
  .header-actions .btn-sm { display: none; }
  .page-hero { min-height: 300px; padding: 120px 0 48px; }
  .article-main { padding: 32px 26px; }
  .cta-panel { padding: 48px 28px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .header-inner { height: 66px; }
  .logo { font-size: 22px; }
  .page-hero h1 { font-size: 26px; }
  .article-shell { padding: 48px 0 40px; }
  .article-main { padding: 24px 18px; border-radius: 16px; }
  .feature-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-card { padding: 26px 16px; }
  .stats-section, .feature-section, .faq-section, .cta-section { padding: 56px 0; }
  .cta-panel { padding: 38px 20px; }
  .cta-actions .btn { width: 100%; }
  .breadcrumb { font-size: 13px; }
  .hero-meta { gap: 12px; font-size: 13px; }
  .side-card { padding: 20px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --bg-deep: #080e17;
  --bg-dark: #0c1524;
  --bg-panel: rgba(16, 26, 42, 0.72);
  --bg-panel-solid: #121d2f;
  --border-soft: rgba(255, 255, 255, 0.08);
  --border-cyan: rgba(56, 189, 248, 0.22);
  --text-hi: #f0f4f8;
  --text-mid: #b4c0d0;
  --text-low: #748396;
  --primary: #38bdf8;
  --primary-deep: #0ea5e9;
  --gold: #f5b942;
  --gold-deep: #f59e0b;
  --green: #34d399;
  --red: #fb7185;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 9px;
  --shadow-card: 0 14px 44px rgba(1, 6, 14, 0.5);
  --shadow-soft: 0 6px 20px rgba(0, 0, 0, 0.25);
  --font-main: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* ===== 基础 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg-deep);
  color: var(--text-mid);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { border: none; background: none; cursor: pointer; font: inherit; color: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { color: var(--text-hi); font-weight: 700; line-height: 1.3; }

/* ===== 容器 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 90px 0;
  position: relative;
}
.section-sm {
  padding: 60px 0;
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid var(--border-cyan);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.section-title {
  font-size: 34px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.section-sub {
  font-size: 16px;
  color: var(--text-mid);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.2;
  letter-spacing: 0.3px;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}
.btn-sm {
  padding: 9px 18px;
  font-size: 14px;
  border-radius: 8px;
}
.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
  border-radius: 12px;
}
.btn-gold {
  background: linear-gradient(135deg, #f5b942 0%, #f59e0b 100%);
  color: #0b1420;
  box-shadow: 0 8px 24px rgba(245, 185, 66, 0.28);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(245, 185, 66, 0.42);
  color: #0b1420;
}
.btn-ghost {
  background: transparent;
  border-color: rgba(56, 189, 248, 0.4);
  color: var(--primary);
}
.btn-ghost:hover {
  background: rgba(56, 189, 248, 0.1);
  border-color: var(--primary);
  transform: translateY(-2px);
}
.btn:focus-visible {
  outline: 3px solid rgba(56, 189, 248, 0.5);
  outline-offset: 2px;
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(8, 14, 23, 0.52);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: all 0.35s ease;
}
.site-header.scrolled {
  background: rgba(8, 14, 23, 0.94);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  border-bottom-color: rgba(255, 255, 255, 0.09);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.logo {
  font-size: 23px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-hi);
  display: inline-flex;
  align-items: baseline;
  gap: 1px;
  white-space: nowrap;
}
.logo span {
  color: var(--gold);
  font-weight: 700;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-mid);
  padding: 6px 2px;
  position: relative;
  transition: color 0.3s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  border-radius: 2px;
  transition: width 0.3s ease;
}
.nav-link:hover,
.nav-link.active {
  color: var(--text-hi);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-hi);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding-top: 70px;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8, 14, 23, 0.94) 0%, rgba(12, 21, 36, 0.78) 50%, rgba(8, 14, 23, 0.88) 100%);
  z-index: 1;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(56, 189, 248, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  z-index: 2;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 3;
  max-width: 640px;
  padding: 80px 0;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--gold);
  background: rgba(245, 185, 66, 0.09);
  border: 1px solid rgba(245, 185, 66, 0.25);
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.hero-eyebrow::before {
  content: '';
  width: 7px;
  height: 7px;
  background: var(--gold);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--gold);
}
.hero h1 {
  font-size: 46px;
  line-height: 1.25;
  margin-bottom: 18px;
  font-weight: 800;
  letter-spacing: 0.5px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--gold), #fbbf24);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-desc {
  font-size: 17px;
  color: var(--text-mid);
  margin-bottom: 32px;
  max-width: 540px;
}
.hero-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 40px;
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
}
.hero-stat {
  border-left: 2px solid rgba(56, 189, 248, 0.35);
  padding-left: 14px;
}
.hero-stat strong {
  display: block;
  font-size: 24px;
  color: var(--text-hi);
  font-weight: 700;
  line-height: 1.3;
}
.hero-stat span {
  font-size: 13px;
  color: var(--text-low);
}
.hero-panel {
  position: absolute;
  right: 5%;
  bottom: 15%;
  z-index: 3;
  width: 320px;
  background: rgba(14, 22, 36, 0.75);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
  display: none;
}
.hero-panel.show {
  display: block;
}
.panel-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.panel-dot {
  width: 9px;
  height: 9px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--green);
  display: inline-block;
  margin-right: 6px;
}
.panel-top span {
  font-size: 13px;
  color: var(--text-mid);
}
.panel-top strong {
  font-size: 20px;
  color: var(--gold);
}
.panel-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 14px;
}
.panel-bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  border-radius: 999px;
}
.panel-labels {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-low);
}

/* ===== 指标区 ===== */
.stats-section {
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border-soft);
}
.stat-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  min-height: 160px;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  opacity: 0;
  transition: opacity 0.3s ease;
}
.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card);
  border-color: var(--border-cyan);
}
.stat-card:hover::before {
  opacity: 1;
}
.stat-icon {
  font-size: 30px;
  color: var(--primary);
  margin-bottom: 10px;
}
.stat-num {
  font-size: 30px;
  font-weight: 800;
  color: var(--text-hi);
  line-height: 1.2;
}
.stat-label {
  font-size: 14px;
  color: var(--text-mid);
  margin-top: 4px;
}

/* ===== 路径图 ===== */
.steps-section {
  background: var(--bg-deep);
}
.step-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  position: relative;
  transition: all 0.3s ease;
  height: 100%;
  overflow: hidden;
}
.step-card::before {
  content: attr(data-step);
  position: absolute;
  top: 14px;
  right: 16px;
  font-size: 44px;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1px rgba(56, 189, 248, 0.16);
  line-height: 1;
  pointer-events: none;
}
.step-card:hover {
  border-color: var(--border-cyan);
  box-shadow: var(--shadow-card);
  transform: translateY(-5px);
}
.step-line {
  position: absolute;
  top: 50px;
  right: -16px;
  width: 32px;
  height: 1px;
  border-top: 2px dashed rgba(56, 189, 248, 0.35);
  z-index: 2;
  display: none;
}
.step-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--primary);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid var(--border-cyan);
  margin-bottom: 18px;
}
.step-icon.gold {
  color: var(--gold);
  background: rgba(245, 185, 66, 0.1);
  border-color: rgba(245, 185, 66, 0.25);
}
.step-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}
.step-card p {
  font-size: 14px;
  color: var(--text-mid);
}

/* ===== 技能卡 ===== */
.skills-section {
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
}
.skills-section::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.06), transparent 70%);
  pointer-events: none;
}
.skill-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: all 0.3s ease;
  position: relative;
}
.skill-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 44px;
  height: 44px;
  border-top: 2px solid var(--primary);
  border-right: 2px solid var(--primary);
  border-radius: 0 var(--radius-lg) 0 0;
  opacity: 0.45;
  transition: opacity 0.3s ease;
}
.skill-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-cyan);
  box-shadow: var(--shadow-card);
}
.skill-card:hover::after {
  opacity: 1;
}
.skill-img {
  height: 180px;
  object-fit: cover;
  width: 100%;
  border-bottom: 1px solid var(--border-soft);
}
.skill-body {
  padding: 26px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.skill-body h3 {
  font-size: 19px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.skill-body h3 i {
  color: var(--gold);
  font-size: 18px;
}
.skill-body p {
  font-size: 14px;
  color: var(--text-mid);
  flex: 1;
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.tag {
  font-size: 12px;
  font-weight: 500;
  color: var(--primary);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  padding: 4px 12px;
  border-radius: 999px;
}
.tag.gold {
  color: var(--gold);
  background: rgba(245, 185, 66, 0.08);
  border-color: rgba(245, 185, 66, 0.22);
}

/* ===== 对比面板 ===== */
.compare-section {
  background: var(--bg-deep);
}
.compare-box {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  height: 100%;
  position: relative;
  transition: all 0.3s ease;
}
.compare-box:hover {
  border-color: var(--border-cyan);
  box-shadow: var(--shadow-card);
}
.compare-box.highlight {
  border-color: rgba(245, 185, 66, 0.35);
  background: linear-gradient(180deg, rgba(245, 185, 66, 0.05), rgba(245, 185, 66, 0.01));
}
.compare-box.highlight::after {
  content: '推荐';
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 12px;
  font-weight: 600;
  color: #0b1420;
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  padding: 4px 12px;
  border-radius: 999px;
}
.compare-vs {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 52px;
  height: 52px;
  background: var(--bg-deep);
  border: 2px solid var(--border-cyan);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
  color: var(--primary);
  z-index: 5;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.15);
}
.compare-box h3 {
  font-size: 19px;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.compare-box .compare-type {
  font-size: 13px;
  color: var(--text-low);
  margin-bottom: 22px;
}
.compare-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.compare-list li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  align-items: flex-start;
  line-height: 1.6;
}
.compare-list i {
  margin-top: 4px;
  font-size: 15px;
}
.compare-list .fa-circle-check {
  color: var(--green);
}
.compare-list .fa-circle-xmark {
  color: var(--red);
}

/* ===== 资讯列表 ===== */
.news-section {
  background: var(--bg-dark);
}
.news-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: all 0.3s ease;
}
.news-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-cyan);
  box-shadow: var(--shadow-card);
}
.news-img {
  height: 160px;
  object-fit: cover;
  width: 100%;
  border-bottom: 1px solid var(--border-soft);
}
.news-body {
  padding: 22px 22px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-low);
  margin-bottom: 10px;
}
.news-meta .date {
  display: flex;
  align-items: center;
  gap: 5px;
}
.news-body h3 {
  font-size: 16px;
  line-height: 1.55;
  margin-bottom: 12px;
  flex: 1;
  transition: color 0.3s ease;
}
.news-card:hover .news-body h3 {
  color: var(--primary);
}
.news-more {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.news-more i {
  transition: transform 0.3s ease;
}
.news-card:hover .news-more i {
  transform: translateX(4px);
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-deep);
}
.faq-wrap {
  max-width: 780px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.faq-item.active {
  border-color: var(--border-cyan);
  box-shadow: var(--shadow-soft);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-hi);
  transition: color 0.3s ease;
}
.faq-question i {
  color: var(--primary);
  font-size: 14px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}
.faq-item.active .faq-question i {
  transform: rotate(180deg);
}
.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-answer {
  padding: 0 24px 22px;
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.9;
  border-top: 1px solid var(--border-soft);
  padding-top: 16px;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 90px 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(8, 14, 23, 0.96) 20%, rgba(12, 21, 36, 0.82) 60%, rgba(8, 14, 23, 0.9) 100%);
}
.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: 34px;
  margin-bottom: 14px;
}
.cta-content p {
  font-size: 16px;
  color: var(--text-mid);
  margin-bottom: 30px;
}
.cta-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.cta-note {
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-low);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.cta-note i {
  color: var(--green);
}

/* ===== 页脚 ===== */
.footer {
  background: #070c14;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-low);
  margin-top: 14px;
  max-width: 340px;
  line-height: 1.8;
}
.footer-col h4 {
  font-size: 16px;
  margin-bottom: 18px;
  color: var(--text-hi);
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  font-size: 14px;
  color: var(--text-mid);
  transition: color 0.3s ease;
}
.footer-col a:hover {
  color: var(--primary);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 22px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-low);
}
.footer-bottom a {
  color: var(--text-mid);
  transition: color 0.3s ease;
}
.footer-bottom a:hover {
  color: var(--primary);
}

/* ===== 响应式 ===== */
@media screen and (max-width: 1024px) {
  .section { padding: 70px 0; }
  .section-title { font-size: 28px; }
  .hero h1 { font-size: 38px; }
  .step-line { display: none; }
  .hero-panel { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media screen and (max-width: 768px) {
  .container { padding: 0 18px; }
  .main-nav {
    position: fixed;
    top: 70px;
    right: 14px;
    width: 220px;
    background: rgba(8, 14, 23, 0.97);
    backdrop-filter: blur(14px);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    display: none;
    z-index: 99;
  }
  .main-nav.open {
    display: flex;
  }
  .main-nav .nav-link {
    padding: 12px 14px;
    border-radius: 8px;
    font-size: 15px;
  }
  .main-nav .nav-link::after {
    display: none;
  }
  .main-nav .nav-link:hover,
  .main-nav .nav-link.active {
    background: rgba(56, 189, 248, 0.1);
    color: var(--text-hi);
  }
  .nav-toggle {
    display: flex;
  }
  .header-actions .btn {
    display: none;
  }
  .hero { min-height: 86vh; }
  .hero h1 { font-size: 32px; }
  .hero-desc { font-size: 15px; }
  .hero-stats { gap: 18px; }
  .hero-stat strong { font-size: 20px; }
  .compare-vs { display: none; }
  .cta-content h2 { font-size: 26px; }
}

@media screen and (max-width: 520px) {
  .section { padding: 56px 0; }
  .section-title { font-size: 24px; }
  .section-sub { font-size: 14px; }
  .hero { min-height: 76vh; }
  .hero h1 { font-size: 27px; }
  .hero-btns .btn { width: 100%; }
  .hero-stats { flex-direction: column; gap: 14px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom p { font-size: 12px; }
  .stat-num { font-size: 26px; }
  .step-card { padding: 26px 20px; }
  .skill-body { padding: 20px 18px; }
  .compare-box { padding: 26px 20px; }
  .faq-question { font-size: 15px; padding: 16px 18px; }
  .faq-answer { padding: 0 18px 18px; }
}

/* roulang page: category2 */
:root {
      --primary: #00e0a8;
      --primary-dark: #00b386;
      --primary-rgb: 0, 224, 168;
      --accent: #ffc850;
      --accent-rgb: 255, 200, 80;
      --dark-bg: #0a1420;
      --dark-bg-2: #101d2e;
      --body-bg: #f4f7fb;
      --white: #ffffff;
      --text: #16233b;
      --text-body: #3c4a5e;
      --muted: #7a899d;
      --border: #e6ecf3;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 24px;
      --shadow-sm: 0 4px 16px rgba(15, 35, 65, .06);
      --shadow-md: 0 10px 30px rgba(15, 35, 65, .1);
      --shadow-lg: 0 24px 60px rgba(15, 35, 65, .16);
      --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
      --transition: all .3s ease;
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      font-family: var(--font-main);
      margin: 0;
      padding: 0;
      background: var(--body-bg);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    ul, ol { list-style: none; margin: 0; padding: 0; }
    a { text-decoration: none; color: inherit; transition: var(--transition); }
    img { max-width: 100%; display: block; }
    button, input, select, textarea { font-family: inherit; }
    a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

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

    /* ===== Buttons ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 28px;
      border-radius: 999px;
      font-weight: 600;
      font-size: 15px;
      line-height: 1.4;
      border: none;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn i { font-size: 14px; }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: #04231a;
      box-shadow: 0 6px 18px rgba(var(--primary-rgb), .25);
    }
    .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(var(--primary-rgb), .4); color: #04231a; }
    .btn-outline { background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .4); color: #fff; backdrop-filter: blur(6px); }
    .btn-outline:hover { background: rgba(255, 255, 255, .18); border-color: rgba(255, 255, 255, .7); color: #fff; transform: translateY(-2px); }
    .btn-sm { padding: 9px 20px; font-size: 14px; }
    .btn-dark { background: var(--dark-bg); color: #fff; }
    .btn-dark:hover { background: var(--dark-bg-2); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }

    /* ===== Header ===== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background: rgba(8, 15, 26, .55);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(255, 255, 255, .08);
      transition: var(--transition);
    }
    .site-header.scrolled {
      background: rgba(8, 15, 26, .92);
      box-shadow: 0 10px 40px rgba(0, 0, 0, .35);
      border-bottom-color: rgba(255, 255, 255, .06);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 20px;
    }
    .logo {
      font-size: 24px;
      font-weight: 800;
      color: #fff;
      letter-spacing: .5px;
      white-space: nowrap;
    }
    .logo span { color: var(--primary); }
    .main-nav { display: flex; align-items: center; gap: 8px; }
    .main-nav .nav-link {
      display: inline-flex;
      align-items: center;
      padding: 9px 18px;
      border-radius: 999px;
      color: rgba(255, 255, 255, .78);
      font-size: 15px;
      font-weight: 500;
      transition: var(--transition);
    }
    .main-nav .nav-link:hover { color: #fff; background: rgba(255, 255, 255, .1); }
    .main-nav .nav-link.active {
      color: #04231a;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      font-weight: 600;
      box-shadow: 0 4px 14px rgba(var(--primary-rgb), .3);
    }
    .header-actions { display: flex; align-items: center; gap: 12px; }
    .nav-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      width: 42px;
      height: 42px;
      align-items: center;
      justify-content: center;
      background: rgba(255, 255, 255, .08);
      border: 1px solid rgba(255, 255, 255, .16);
      border-radius: 12px;
      cursor: pointer;
    }
    .nav-toggle span { display: block; width: 18px; height: 2px; background: #fff; border-radius: 2px; transition: var(--transition); }
    .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav-toggle.open span:nth-child(2) { opacity: 0; }
    .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    /* ===== Page Hero ===== */
    .page-hero {
      position: relative;
      padding: 172px 0 100px;
      background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
      color: #fff;
      overflow: hidden;
    }
    .page-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(5, 12, 24, .88), rgba(8, 22, 40, .72));
      z-index: 1;
    }
    .page-hero::after {
      content: '';
      position: absolute;
      width: 480px;
      height: 480px;
      right: -120px;
      bottom: -160px;
      background: radial-gradient(circle, rgba(var(--primary-rgb), .28), transparent 70%);
      z-index: 1;
    }
    .page-hero .hero-content { position: relative; z-index: 2; max-width: 780px; }
    .breadcrumb {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 16px;
      border-radius: 999px;
      background: rgba(255, 255, 255, .08);
      border: 1px solid rgba(255, 255, 255, .16);
      font-size: 13px;
      color: rgba(255, 255, 255, .75);
      margin-bottom: 22px;
      backdrop-filter: blur(8px);
    }
    .breadcrumb a:hover { color: var(--primary); }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 999px;
      background: rgba(var(--primary-rgb), .14);
      border: 1px solid rgba(var(--primary-rgb), .35);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 1px;
      margin-bottom: 20px;
    }
    .page-hero h1 {
      font-size: 52px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
      color: #fff;
      letter-spacing: 1px;
    }
    .page-hero h1 span { color: var(--primary); }
    .page-hero .hero-lead {
      font-size: 17px;
      line-height: 1.9;
      color: rgba(255, 255, 255, .82);
      margin-bottom: 34px;
      max-width: 680px;
    }
    .hero-btns { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 54px; }
    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 780px;
    }
    .hero-stat {
      padding: 22px 24px;
      border-radius: var(--radius-md);
      background: rgba(255, 255, 255, .07);
      border: 1px solid rgba(255, 255, 255, .14);
      backdrop-filter: blur(10px);
      transition: var(--transition);
    }
    .hero-stat strong { display: block; font-size: 30px; font-weight: 800; color: var(--accent); line-height: 1.3; }
    .hero-stat span { font-size: 13px; color: rgba(255, 255, 255, .65); }

    /* ===== Section ===== */
    .section { padding: 96px 0; }
    .section-alt { background: #fff; }
    .section-dark {
      background: var(--dark-bg);
      color: rgba(255, 255, 255, .82);
      position: relative;
      overflow: hidden;
    }
    .section-dark .section-title { color: #fff; }
    .section-head { max-width: 720px; margin: 0 auto 60px; text-align: center; }
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      border-radius: 999px;
      background: rgba(var(--primary-rgb), .1);
      border: 1px solid rgba(var(--primary-rgb), .3);
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 1px;
      margin-bottom: 16px;
    }
    .section-title { font-size: 36px; font-weight: 800; color: var(--text); line-height: 1.3; margin-bottom: 14px; letter-spacing: .5px; }
    .section-desc { font-size: 16px; line-height: 1.8; color: var(--muted); }

    /* ===== Promo Cards ===== */
    .promo-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .promo-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(var(--primary-rgb), .4);
    }
    .promo-card-media { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
    .promo-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
    .promo-card:hover .promo-card-media img { transform: scale(1.07); }
    .promo-card-media::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 60%, rgba(10, 15, 26, .35));
    }
    .promo-badge {
      position: absolute;
      top: 14px;
      left: 14px;
      z-index: 2;
      padding: 5px 14px;
      border-radius: 999px;
      background: rgba(10, 15, 26, .72);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, .18);
      color: #fff;
      font-size: 12px;
      font-weight: 600;
      letter-spacing: .5px;
    }
    .promo-badge.hot { background: linear-gradient(135deg, var(--accent), #ff9f1c); color: #2b1b00; border-color: transparent; }
    .promo-card-body { padding: 26px 24px 28px; flex: 1; display: flex; flex-direction: column; }
    .promo-card-body h3 { font-size: 20px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
    .promo-card-body p { font-size: 14.5px; line-height: 1.8; color: var(--muted); flex: 1; margin-bottom: 18px; }
    .promo-link {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      color: var(--primary-dark);
      font-weight: 600;
      font-size: 14px;
    }
    .promo-link:hover { gap: 12px; color: var(--primary-dark); }

    /* ===== Type Cards ===== */
    .type-card {
      position: relative;
      padding: 32px 28px;
      border-radius: var(--radius-md);
      background: rgba(255, 255, 255, .06);
      border: 1px solid rgba(255, 255, 255, .12);
      backdrop-filter: blur(6px);
      transition: var(--transition);
      height: 100%;
      overflow: hidden;
    }
    .type-card::before {
      content: '';
      position: absolute;
      width: 140px;
      height: 140px;
      right: -40px;
      top: -40px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(var(--primary-rgb), .18), transparent 70%);
    }
    .type-card:hover { transform: translateY(-6px); border-color: rgba(var(--primary-rgb), .5); background: rgba(255, 255, 255, .1); }
    .type-icon {
      width: 56px;
      height: 56px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      color: var(--primary);
      background: rgba(var(--primary-rgb), .14);
      border: 1px solid rgba(var(--primary-rgb), .3);
      margin-bottom: 20px;
    }
    .type-card h3 { font-size: 19px; font-weight: 700; color: #fff; margin-bottom: 12px; }
    .type-card p { font-size: 14.5px; line-height: 1.8; color: rgba(255, 255, 255, .62); margin: 0; }

    /* ===== Steps ===== */
    .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .step-item {
      position: relative;
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 34px 26px;
      transition: var(--transition);
      height: 100%;
    }
    .step-item:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
    .step-num {
      font-size: 52px;
      font-weight: 800;
      line-height: 1;
      color: transparent;
      -webkit-text-stroke: 1.5px var(--primary);
      margin-bottom: 18px;
    }
    .step-item h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
    .step-item p { font-size: 14.5px; color: var(--muted); line-height: 1.8; margin: 0; }
    .step-arrow {
      position: absolute;
      top: 50%;
      right: -22px;
      transform: translateY(-50%);
      width: 34px;
      height: 34px;
      border-radius: 50%;
      background: #fff;
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-dark);
      font-size: 13px;
      z-index: 3;
      box-shadow: var(--shadow-sm);
    }

    /* ===== FAQ ===== */
    .faq-wrap { max-width: 860px; margin: 0 auto; }
    .faq-wrap .accordion { background: transparent; border: none; }
    .faq-wrap .accordion-item {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-wrap .accordion-item:hover { border-color: rgba(var(--primary-rgb), .35); }
    .faq-wrap .accordion-item.is-active { box-shadow: var(--shadow-sm); border-color: rgba(var(--primary-rgb), .4); }
    .faq-wrap .accordion-title {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      background: transparent;
      border: none;
      position: relative;
    }
    .faq-wrap .accordion-title::before {
      content: '\f059';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      color: var(--primary-dark);
      font-size: 18px;
    }
    .faq-wrap .accordion-title::after {
      content: '\f078';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      position: absolute;
      right: 22px;
      color: var(--muted);
      transition: var(--transition);
    }
    .faq-wrap .accordion-item.is-active .accordion-title::after { transform: rotate(180deg); color: var(--primary-dark); }
    .faq-wrap .accordion-content {
      padding: 0 24px 22px 58px;
      background: transparent;
      border: none;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.9;
    }

    /* ===== CTA ===== */
    .cta-section {
      position: relative;
      padding: 96px 0;
      background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
      color: #fff;
      text-align: center;
      overflow: hidden;
    }
    .cta-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(5, 12, 24, .9), rgba(8, 20, 38, .78));
    }
    .cta-section .container { position: relative; z-index: 2; }
    .cta-section h2 { font-size: 38px; font-weight: 800; color: #fff; margin-bottom: 16px; }
    .cta-section p { font-size: 17px; color: rgba(255, 255, 255, .75); max-width: 640px; margin: 0 auto 34px; line-height: 1.9; }
    .cta-btns { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; }

    /* ===== Footer ===== */
    .footer { background: #08101c; color: rgba(255, 255, 255, .65); padding: 72px 0 0; }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 48px;
      padding-bottom: 48px;
    }
    .footer-brand .logo { font-size: 26px; margin-bottom: 18px; display: inline-block; }
    .footer-brand p { font-size: 14.5px; line-height: 1.9; max-width: 340px; margin: 0; }
    .footer-col h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
    .footer-col h4::after { content: ''; position: absolute; left: 0; bottom: 0; width: 28px; height: 2px; background: var(--primary); border-radius: 2px; }
    .footer-col ul li { margin-bottom: 11px; }
    .footer-col ul a { color: rgba(255, 255, 255, .6); font-size: 14.5px; transition: var(--transition); }
    .footer-col ul a:hover { color: var(--primary); padding-left: 6px; }
    .footer-bottom { border-top: 1px solid rgba(255, 255, 255, .08); padding: 22px 0; text-align: center; }
    .footer-bottom p { font-size: 13.5px; color: rgba(255, 255, 255, .4); margin: 0; }
    .footer-bottom a { color: rgba(255, 255, 255, .65); }
    .footer-bottom a:hover { color: var(--primary); }

    /* ===== Responsive ===== */
    @media screen and (max-width: 1024px) {
      .hero-stats { grid-template-columns: repeat(2, 1fr); }
      .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
      .step-arrow { display: none; }
      .page-hero h1 { font-size: 44px; }
      .section { padding: 80px 0; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media screen and (max-width: 768px) {
      .main-nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        background: rgba(8, 15, 26, .98);
        backdrop-filter: blur(18px);
        border-bottom: 1px solid rgba(255, 255, 255, .08);
        padding: 16px 20px 20px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-12px);
        transition: var(--transition);
        box-shadow: 0 20px 50px rgba(0, 0, 0, .4);
      }
      .main-nav.open { opacity: 1; visibility: visible; transform: translateY(0); }
      .main-nav .nav-link { padding: 13px 16px; font-size: 15px; border-radius: 12px; justify-content: center; }
      .nav-toggle { display: flex; }
      .header-actions .btn-sm { display: none; }
      .page-hero { padding: 140px 0 72px; }
      .page-hero h1 { font-size: 36px; }
      .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 12px; }
      .hero-stat { padding: 18px; }
      .hero-stat strong { font-size: 24px; }
      .hero-btns .btn { flex: 1; }
      .section-title { font-size: 30px; }
      .cta-section h2 { font-size: 30px; }
      .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    }
    @media screen and (max-width: 520px) {
      .page-hero h1 { font-size: 30px; }
      .page-hero .hero-lead { font-size: 15px; }
      .hero-stats { grid-template-columns: 1fr 1fr; }
      .section { padding: 66px 0; }
      .section-head { margin-bottom: 40px; }
      .steps-grid { grid-template-columns: 1fr; }
      .hero-btns { flex-direction: column; }
      .hero-btns .btn { width: 100%; }
      .cta-btns { flex-direction: column; }
      .cta-btns .btn { width: 100%; }
      .faq-wrap .accordion-title { font-size: 15px; padding-right: 44px; }
    }