/* ============================================
   XX科技有限公司 - 全站样式系统
   科技蓝科研风 | 计算模拟 & 测试表征
   ============================================ */

/* ---------- CSS 变量：色彩体系 ---------- */
:root {
  /* 主色调 - 深海蓝 */
  --c-primary-900: #0a1a3b;
  --c-primary-800: #0f2555;
  --c-primary-700: #14306e;
  --c-primary-600: #1a3d8a;
  --c-primary-500: #2150b0;
  --c-primary-400: #3668cc;
  --c-primary-300: #5a8ae0;

  /* 强调色 - 科技青 */
  --c-accent-cyan: #22d3ee;
  --c-accent-cyan-600: #0891b2;

  /* 数据/点缀色 - 琥珀金 */
  --c-amber: #f59e0b;
  --c-amber-light: #fcd34d;

  /* 语义色 */
  --c-success: #10b981;
  --c-warn: #f59e0b;

  /* 中性色 - 带蓝调的灰 */
  --c-neutral-900: #0f172a;
  --c-neutral-800: #1e293b;
  --c-neutral-700: #334155;
  --c-neutral-600: #475569;
  --c-neutral-500: #64748b;
  --c-neutral-400: #94a3b8;
  --c-neutral-300: #cbd5e1;
  --c-neutral-200: #e2e8f0;
  --c-neutral-100: #f1f5f9;
  --c-neutral-50: #f8fafc;
  --c-white: #ffffff;

  /* 字体 */
  --f-serif: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  --f-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --f-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;

  /* 尺寸 */
  --s-nav-h: 72px;
  --s-max-w: 1200px;

  /* 过渡 */
  --t-fast: 0.2s ease;
  --t-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --t-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.12);
  --shadow-blue: 0 8px 32px rgba(26, 61, 138, 0.18);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--f-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-neutral-700);
  background: var(--c-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--t-fast); }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }

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

/* ---------- 顶部导航 ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--s-nav-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-neutral-200);
  z-index: 1000;
  transition: all var(--t-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  max-width: var(--s-max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--c-primary-800);
  letter-spacing: 0.5px;
}

.nav-logo-mark {
  width: 36px;
  height: 36px;
  position: relative;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-menu a {
  display: block;
  padding: 10px 16px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--c-neutral-700);
  border-radius: 6px;
  transition: all var(--t-fast);
  position: relative;
}

.nav-menu a:hover {
  color: var(--c-primary-600);
  background: var(--c-neutral-100);
}

.nav-menu a.active {
  color: var(--c-primary-600);
  font-weight: 600;
}

.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--c-primary-500);
  border-radius: 1px;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 20px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 6px;
  transition: all var(--t-fast);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--c-primary-600);
  color: white;
}

.btn-primary:hover {
  background: var(--c-primary-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow-blue);
}

.btn-outline {
  border-color: var(--c-neutral-300);
  color: var(--c-neutral-700);
  background: white;
}

.btn-outline:hover {
  border-color: var(--c-primary-400);
  color: var(--c-primary-600);
}

.btn-large {
  padding: 14px 28px;
  font-size: 15px;
  border-radius: 8px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--c-neutral-700);
  border-radius: 1px;
  transition: all var(--t-fast);
}

/* ---------- 页面头部间距 ---------- */
.page-main {
  padding-top: var(--s-nav-h);
  min-height: 100vh;
  min-height: 100dvh;
}

/* ---------- HERO 区 ---------- */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--c-primary-900) 0%, var(--c-primary-700) 50%, var(--c-primary-600) 100%);
  color: white;
  overflow: hidden;
  padding: 100px 0 80px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(34, 211, 238, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(54, 104, 204, 0.3) 0%, transparent 40%);
  pointer-events: none;
}

/* 分子点阵装饰 */
.hero-lattice {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.12;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-accent-cyan);
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.hero h1 {
  font-family: var(--f-serif);
  font-size: 48px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.hero h1 .highlight {
  color: var(--c-accent-cyan);
  position: relative;
}

.hero-subtitle {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-actions .btn-primary {
  background: var(--c-accent-cyan);
  color: var(--c-primary-900);
  font-weight: 600;
}

.hero-actions .btn-primary:hover {
  background: #67e8f9;
  box-shadow: 0 8px 30px rgba(34, 211, 238, 0.4);
}

.hero-actions .btn-outline {
  border-color: rgba(255, 255, 255, 0.3);
  color: white;
  background: transparent;
}

.hero-actions .btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.hero-contact {
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

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

.hero-contact-item strong {
  color: white;
  font-weight: 600;
}

/* Hero 右侧视觉卡片 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-card {
  position: relative;
  width: 100%;
  max-width: 380px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  padding: 28px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.hero-card-title {
  font-size: 13px;
  color: var(--c-accent-cyan);
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.hero-card-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.hero-card-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all var(--t-fast);
}

.hero-card-item:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(4px);
}

.hero-card-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(34, 211, 238, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-accent-cyan);
  flex-shrink: 0;
}

.hero-card-text h4 {
  font-size: 14px;
  font-weight: 600;
  color: white;
  margin-bottom: 2px;
}

.hero-card-text p {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- 通用 Section ---------- */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-primary-500);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-title {
  font-family: var(--f-serif);
  font-size: 34px;
  font-weight: 700;
  color: var(--c-neutral-900);
  line-height: 1.3;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--c-neutral-500);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

.section-alt {
  background: var(--c-neutral-50);
}

/* ---------- 服务入口卡片 ---------- */
.service-entry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.service-entry-card {
  position: relative;
  background: white;
  border-radius: 16px;
  padding: 40px;
  border: 1px solid var(--c-neutral-200);
  transition: all var(--t-base);
  overflow: hidden;
}

.service-entry-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--c-primary-500), var(--c-accent-cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-slow);
}

.service-entry-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-blue);
  border-color: var(--c-primary-300);
}

.service-entry-card:hover::before {
  transform: scaleX(1);
}

.service-entry-head {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 20px;
}

.service-entry-icon {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--c-primary-500), var(--c-primary-700));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
}

.service-entry-head h3 {
  font-family: var(--f-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--c-neutral-900);
  margin-bottom: 6px;
}

.service-entry-head p {
  font-size: 14px;
  color: var(--c-neutral-500);
}

.service-entry-desc {
  font-size: 14.5px;
  color: var(--c-neutral-600);
  line-height: 1.75;
  margin-bottom: 24px;
}

.service-entry-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.service-entry-list span {
  padding: 5px 12px;
  background: var(--c-neutral-100);
  color: var(--c-neutral-600);
  font-size: 12.5px;
  border-radius: 100px;
  transition: all var(--t-fast);
}

.service-entry-card:hover .service-entry-list span {
  background: var(--c-primary-50);
  color: var(--c-primary-600);
}

.service-entry-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-primary-600);
  transition: gap var(--t-fast);
}

.service-entry-link:hover {
  gap: 10px;
}

/* ---------- 优势区 ---------- */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-item {
  text-align: center;
  padding: 32px 20px;
  border-radius: 12px;
  transition: all var(--t-base);
}

.advantage-item:hover {
  background: white;
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.advantage-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(33, 80, 176, 0.1), rgba(34, 211, 238, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary-600);
}

.advantage-item h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--c-neutral-900);
  margin-bottom: 8px;
}

.advantage-item p {
  font-size: 13.5px;
  color: var(--c-neutral-500);
  line-height: 1.65;
}

/* ---------- 服务流程 ---------- */
.process-section {
  background: var(--c-primary-900);
  color: white;
  position: relative;
  overflow: hidden;
}

.process-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 10% 50%, rgba(34, 211, 238, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 90% 20%, rgba(54, 104, 204, 0.15) 0%, transparent 40%);
  pointer-events: none;
}

.process-section .section-eyebrow {
  color: var(--c-accent-cyan);
}

.process-section .section-title {
  color: white;
}

.process-section .section-desc {
  color: rgba(255, 255, 255, 0.65);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
  z-index: 2;
}

.process-step {
  position: relative;
  padding: 28px 20px;
  text-align: center;
}

.process-step-num {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 2px solid var(--c-accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--c-accent-cyan);
}

.process-step h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.process-step p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
}

.process-step::after {
  content: '';
  position: absolute;
  top: 52px;
  right: -50%;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent-cyan), rgba(255, 255, 255, 0.2));
  z-index: -1;
}

.process-step:last-child::after {
  display: none;
}

/* ---------- 演示数据区 ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.stat-card {
  text-align: center;
  padding: 32px 20px;
  background: white;
  border-radius: 12px;
  border: 1px solid var(--c-neutral-200);
  transition: all var(--t-base);
}

.stat-card:hover {
  border-color: var(--c-primary-400);
  box-shadow: var(--shadow-blue);
  transform: translateY(-4px);
}

.stat-number {
  font-family: var(--f-mono);
  font-size: 42px;
  font-weight: 700;
  color: var(--c-primary-600);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-number .stat-unit {
  font-size: 18px;
  font-weight: 600;
  margin-left: 2px;
}

.stat-label {
  font-size: 14px;
  color: var(--c-neutral-600);
  margin-bottom: 6px;
}

.stat-note {
  font-size: 12px;
  color: var(--c-neutral-400);
}

.data-notice {
  text-align: center;
  margin-top: 28px;
  font-size: 12.5px;
  color: var(--c-neutral-400);
}

.data-notice span {
  display: inline-block;
  padding: 4px 12px;
  background: var(--c-neutral-100);
  border-radius: 100px;
}

/* ---------- 内页 Banner ---------- */
.page-banner {
  position: relative;
  background: linear-gradient(135deg, var(--c-primary-900) 0%, var(--c-primary-700) 100%);
  color: white;
  padding: 80px 0 60px;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 30% 50%, rgba(34, 211, 238, 0.12) 0%, transparent 40%);
  pointer-events: none;
}

.page-banner-inner {
  position: relative;
  z-index: 2;
}

.banner-breadcrumb {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.banner-breadcrumb a {
  color: rgba(255, 255, 255, 0.7);
}

.banner-breadcrumb a:hover {
  color: var(--c-accent-cyan);
}

.page-banner h1 {
  font-family: var(--f-serif);
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: 1px;
}

.page-banner p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.75);
  max-width: 600px;
  line-height: 1.7;
}

/* ---------- 服务项目列表 ---------- */
.service-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.service-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 28px;
  padding: 28px;
  background: white;
  border-radius: 12px;
  border: 1px solid var(--c-neutral-200);
  transition: all var(--t-base);
}

.service-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--c-primary-300);
  transform: translateX(4px);
}

.service-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--c-primary-50), var(--c-accent-cyan-600 / 0.1));
  border-radius: 12px;
  color: var(--c-primary-600);
}

.service-item-content h3 {
  font-family: var(--f-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--c-neutral-900);
  margin-bottom: 8px;
}

.service-item-content p {
  font-size: 14.5px;
  color: var(--c-neutral-600);
  line-height: 1.75;
  margin-bottom: 12px;
}

.service-item-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.service-item-tags span {
  padding: 4px 10px;
  background: var(--c-neutral-100);
  color: var(--c-neutral-600);
  font-size: 12px;
  border-radius: 4px;
}

/* ---------- 双栏布局 ---------- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.info-card {
  padding: 32px;
  background: white;
  border-radius: 12px;
  border: 1px solid var(--c-neutral-200);
}

.info-card h3 {
  font-family: var(--f-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--c-neutral-900);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--c-primary-100);
  display: flex;
  align-items: center;
  gap: 10px;
}

.info-card h3 svg {
  color: var(--c-primary-600);
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.info-list li {
  display: flex;
  gap: 12px;
  padding-left: 8px;
  position: relative;
}

.info-list li::before {
  content: '';
  flex-shrink: 0;
  margin-top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-primary-400);
}

.info-list strong {
  color: var(--c-neutral-800);
  font-weight: 600;
  margin-right: 8px;
}

.info-list span {
  color: var(--c-neutral-600);
  font-size: 14px;
}

/* ---------- FAQ ---------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--c-neutral-200);
  border-radius: 12px;
  overflow: hidden;
}

.faq-item {
  background: white;
  padding: 20px 24px;
  cursor: pointer;
  transition: background var(--t-fast);
}

.faq-item:hover {
  background: var(--c-neutral-50);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  color: var(--c-neutral-800);
  font-size: 15px;
}

.faq-q svg {
  color: var(--c-primary-500);
  transition: transform var(--t-fast);
  flex-shrink: 0;
}

.faq-item.open .faq-q svg {
  transform: rotate(180deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--t-base), padding var(--t-base);
  font-size: 14px;
  color: var(--c-neutral-600);
  line-height: 1.7;
}

.faq-item.open .faq-a {
  max-height: 300px;
  padding-top: 12px;
}

/* ---------- 学院/媒体卡片 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* 特色新闻网格（新闻页顶部） */
.featured-news-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 24px;
}

/* 学院页公开课宽卡片 */
.service-item-wide { grid-template-columns: 160px 1fr; }

.content-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--c-neutral-200);
  transition: all var(--t-base);
  cursor: pointer;
}

.content-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--c-primary-300);
}

.card-thumb {
  height: 160px;
  background: linear-gradient(135deg, var(--c-primary-600), var(--c-primary-800));
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-thumb::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 30%, rgba(34, 211, 238, 0.3) 0%, transparent 50%);
}

.card-thumb-icon {
  position: relative;
  z-index: 2;
  color: rgba(255, 255, 255, 0.85);
}

.card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  color: white;
  font-size: 12px;
  border-radius: 4px;
  z-index: 3;
}

.card-body {
  padding: 20px;
}

.card-date {
  font-size: 12px;
  color: var(--c-neutral-400);
  margin-bottom: 8px;
}

.card-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-neutral-900);
  margin-bottom: 8px;
  line-height: 1.5;
}

.card-body p {
  font-size: 13.5px;
  color: var(--c-neutral-500);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- 关于我们 ---------- */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
  align-items: center;
}

.about-visual {
  height: 360px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--c-primary-700), var(--c-primary-500));
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 40%, rgba(34, 211, 238, 0.25) 0%, transparent 40%),
    radial-gradient(circle at 80% 60%, rgba(245, 158, 11, 0.15) 0%, transparent 40%);
}

.about-text h2 {
  font-family: var(--f-serif);
  font-size: 30px;
  font-weight: 700;
  color: var(--c-neutral-900);
  margin-bottom: 20px;
  line-height: 1.35;
}

.about-text p {
  font-size: 15px;
  color: var(--c-neutral-600);
  line-height: 1.85;
  margin-bottom: 16px;
}

/* 时间线 */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-primary-300), var(--c-neutral-200));
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 20px 40px;
}

.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
}

.timeline-dot {
  position: absolute;
  top: 28px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-primary-500);
  border: 3px solid white;
  box-shadow: 0 0 0 2px var(--c-primary-300);
}

.timeline-item:nth-child(odd) .timeline-dot {
  right: -7px;
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -7px;
}

.timeline-year {
  font-family: var(--f-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-primary-600);
  margin-bottom: 8px;
}

.timeline-content {
  background: white;
  padding: 18px 22px;
  border-radius: 10px;
  border: 1px solid var(--c-neutral-200);
  box-shadow: var(--shadow-sm);
}

.timeline-content h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-neutral-900);
  margin-bottom: 6px;
}

.timeline-content p {
  font-size: 13.5px;
  color: var(--c-neutral-500);
  line-height: 1.65;
}

/* 资质卡片 */
.creds-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.cred-item {
  text-align: center;
  padding: 28px 16px;
  background: white;
  border-radius: 10px;
  border: 1px solid var(--c-neutral-200);
}

.cred-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary-600);
}

.cred-item h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-neutral-800);
  margin-bottom: 4px;
}

.cred-item p {
  font-size: 12.5px;
  color: var(--c-neutral-500);
}

/* ---------- 联系表单 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
}

.contact-info-block {
  padding: 36px;
  background: linear-gradient(135deg, var(--c-primary-800), var(--c-primary-600));
  border-radius: 16px;
  color: white;
}

.contact-info-block h3 {
  font-family: var(--f-serif);
  font-size: 22px;
  margin-bottom: 8px;
}

.contact-info-block > p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 28px;
}

.contact-item {
  display: flex;
  gap: 14px;
  margin-bottom: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.contact-item-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-accent-cyan);
  flex-shrink: 0;
}

.contact-item-text h4 {
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 4px;
}

.contact-item-text p {
  font-size: 15px;
  font-weight: 600;
}

.contact-form {
  padding: 36px;
  background: white;
  border-radius: 16px;
  border: 1px solid var(--c-neutral-200);
}

.contact-form h3 {
  font-family: var(--f-serif);
  font-size: 22px;
  color: var(--c-neutral-900);
  margin-bottom: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--c-neutral-700);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  font-size: 14px;
  font-family: inherit;
  border: 1px solid var(--c-neutral-300);
  border-radius: 6px;
  transition: all var(--t-fast);
  background: white;
  color: var(--c-neutral-800);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--c-primary-400);
  box-shadow: 0 0 0 3px rgba(33, 80, 176, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* ---------- CTA 区域 ---------- */
.cta-section {
  background: linear-gradient(135deg, var(--c-primary-800), var(--c-primary-600));
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 50%, rgba(34, 211, 238, 0.15) 0%, transparent 40%);
}

.cta-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta-text h2 {
  font-family: var(--f-serif);
  font-size: 28px;
  color: white;
  margin-bottom: 8px;
}

.cta-text p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 15px;
}

.cta-actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

.cta-actions .btn-primary {
  background: var(--c-accent-cyan);
  color: var(--c-primary-900);
  font-weight: 600;
}

.cta-actions .btn-primary:hover {
  background: #67e8f9;
}

.cta-actions .btn-outline {
  border-color: rgba(255, 255, 255, 0.35);
  color: white;
  background: transparent;
}

.cta-actions .btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* ---------- 底部 ---------- */
.footer {
  background: var(--c-neutral-900);
  color: var(--c-neutral-400);
  padding: 56px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--c-neutral-800);
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-serif);
  font-size: 18px;
  font-weight: 700;
  color: white;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-neutral-500);
  margin-bottom: 20px;
}

.footer-socials {
  display: flex;
  gap: 10px;
}

.footer-socials a {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--c-neutral-800);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-neutral-400);
  transition: all var(--t-fast);
}

.footer-socials a:hover {
  background: var(--c-primary-600);
  color: white;
}

.footer-col h4 {
  font-size: 14.5px;
  font-weight: 600;
  color: white;
  margin-bottom: 18px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  font-size: 13.5px;
  color: var(--c-neutral-500);
  transition: color var(--t-fast);
}

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

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-contact-item {
  display: flex;
  gap: 10px;
  font-size: 13.5px;
  color: var(--c-neutral-500);
  line-height: 1.6;
}

.footer-contact-item svg {
  color: var(--c-primary-400);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 12.5px;
  color: var(--c-neutral-600);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a:hover {
  color: var(--c-accent-cyan);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .process-step::after { display: none; }
  .card-grid { grid-template-columns: repeat(3, 1fr); }
  .creds-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .featured-news-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  html { font-size: 15px; }
  body { font-size: 14.5px; line-height: 1.7; }
  .container { padding: 0 16px; }
  .nav-inner { padding: 0 16px; }

  .nav-menu { display: none; }
  .nav-toggle { display: flex; min-height: 44px; min-width: 44px; align-items: center; justify-content: center; }

  /* 移动端导航抽屉 */
  .nav-menu.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--s-nav-h);
    left: 0; right: 0;
    bottom: 0;
    background: white;
    padding: 16px;
    border-bottom: 1px solid var(--c-neutral-200);
    box-shadow: var(--shadow-md);
    gap: 4px;
    z-index: 999;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .nav-menu.mobile-open a {
    padding: 14px 16px;
    min-height: 48px;
    width: 100%;
    font-size: 16px;
    display: flex;
    align-items: center;
    border-radius: 8px;
  }

  body.menu-open { overflow: hidden; }

  .nav-cta .btn-primary {
    padding: 8px 14px;
    font-size: 13px;
  }

  .hero { padding: 60px 0 50px; }
  .hero-content { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 28px; line-height: 1.3; }
  .hero-subtitle { font-size: 15px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; padding: 14px 20px; min-height: 48px; font-size: 15px; }
  .hero-contact { flex-wrap: wrap; gap: 8px 20px; }
  .hero-card { max-width: 100%; padding: 22px; }

  .section { padding: 48px 0; }
  .section-title { font-size: 24px; line-height: 1.3; }
  .section-eyebrow { font-size: 13px; }

  .service-entry-grid { grid-template-columns: 1fr; }

  .advantages-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-number { font-size: 32px; }
  .stat-card { padding: 20px 14px; }

  .process-steps { grid-template-columns: 1fr 1fr; gap: 12px; }
  .process-step { padding: 16px; }
  .process-step-num { width: 36px; height: 36px; font-size: 15px; }

  .two-col { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-intro { grid-template-columns: 1fr; }

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

  .page-banner { padding: 48px 0 32px; }
  .page-banner h1 { font-size: 24px; line-height: 1.3; }
  .page-banner p { font-size: 14px; }
  .banner-breadcrumb { font-size: 13px; }

  .service-item { grid-template-columns: 60px 1fr; padding: 18px 16px; gap: 14px; }
  .service-item-wide { grid-template-columns: 100px 1fr; }
  .service-item-icon { width: 60px; height: 60px; }
  .service-item-content h3 { font-size: 16px; }
  .service-item-tags { flex-wrap: wrap; }
  .service-item-tags span { font-size: 12px; }

  .timeline::before { left: 20px; }
  .timeline-item { width: 100%; left: 0 !important; text-align: left !important; padding: 14px 20px 14px 44px; }
  .timeline-item .timeline-dot { left: 13px !important; right: auto !important; }

  .cta-section { padding: 48px 0; }
  .cta-inner { flex-direction: column; text-align: center; gap: 20px; }
  .cta-inner h2 { font-size: 22px; }
  .cta-inner .btn { min-height: 48px; padding: 12px 24px; font-size: 15px; }

  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 8px; }
  .footer-col h4 { font-size: 15px; }
  .footer-col a { min-height: 40px; display: inline-flex; align-items: center; }
  .footer-socials a { width: 44px; height: 44px; }

  .form-row { grid-template-columns: 1fr; }
  .form-group input, .form-group textarea, .form-group select {
    padding: 12px 14px; min-height: 44px; font-size: 16px;
  }
  .form-group textarea { min-height: 120px; }

  .creds-grid { grid-template-columns: 1fr 1fr; gap: 12px; }

  .faq-item { padding: 16px; }
  .faq-q { min-height: 48px; font-size: 15px; gap: 12px; }

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

  /* 防止内联样式中的固定宽度在小屏溢出 */
  .card-thumb[style*="width: 120px"] { width: 90px !important; min-height: 80px !important; }
}

@media (max-width: 480px) {
  :root { --s-nav-h: 60px; }

  .nav-logo { font-size: 16px; }
  .nav-logo-mark { width: 30px; height: 30px; }
  .nav-cta .btn-primary { padding: 6px 12px; font-size: 12.5px; }

  .hero { padding: 48px 0 40px; }
  .hero h1 { font-size: 24px; }
  .hero-subtitle { font-size: 14px; }
  .hero-actions .btn { min-height: 46px; font-size: 14.5px; }

  .section { padding: 40px 0; }
  .section-title { font-size: 21px; }

  .advantages-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .creds-grid { grid-template-columns: 1fr 1fr; }

  .service-item { grid-template-columns: 52px 1fr; padding: 16px 14px; gap: 12px; }
  .service-item-wide { grid-template-columns: 1fr; text-align: center; }
  .service-item-icon { width: 52px; height: 52px; margin: 0 auto; }
  .service-item-wide .service-item-icon { width: 72px; height: 72px; }
  .service-item-content h3 { font-size: 15.5px; }

  .page-banner h1 { font-size: 22px; }
  .page-banner { padding: 40px 0 28px; }

  .hero-card { padding: 18px; }
  .hero-card-item { padding: 12px; }

  .stat-card { padding: 20px 16px; }
  .stat-number { font-size: 28px; }

  .btn-large { padding: 12px 24px; font-size: 14.5px; }

  .cta-inner h2 { font-size: 20px; }
  .cta-section { padding: 40px 0; }

  .timeline-item { padding: 12px 16px 12px 40px; }
  .timeline-item .timeline-dot { left: 11px !important; }
  .timeline-year { font-size: 15px; }

  .card-thumb { height: 200px; }
  .card-thumb[style*="height: 280px"] { height: 200px !important; }

  .featured-news-grid > div:nth-child(2) { gap: 12px; }
  .featured-news-grid .content-card[style*="flex-direction:row"] { flex-direction: column !important; }
  .card-thumb[style*="width: 120px"] { width: 100% !important; min-height: 120px !important; }
}

/* ---------- 文章详情弹层 ---------- */
.article-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(6px);
  z-index: 2000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-base), visibility var(--t-base);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.article-modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.article-modal {
  position: relative;
  background: white;
  border-radius: 16px;
  width: 100%;
  max-width: 800px;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.25);
  transform: translateY(20px);
  transition: transform var(--t-base);
  overflow: hidden;
}

.article-modal-overlay.show .article-modal {
  transform: translateY(0);
}

.article-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--c-neutral-100);
  color: var(--c-neutral-600);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--t-fast);
  z-index: 10;
}

.article-modal-close:hover {
  background: var(--c-neutral-200);
  color: var(--c-neutral-800);
}

.article-modal-content { padding: 48px 56px; }

.article-header { margin-bottom: 32px; }

.article-category {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 12.5px;
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.article-cat-company { background: #dbeafe; color: #1d4ed8; }
.article-cat-industry { background: #cffafe; color: #0e7490; }
.article-cat-research { background: #d1fae5; color: #047857; }

.article-title {
  font-family: var(--f-serif);
  font-size: 30px;
  line-height: 1.3;
  color: var(--c-neutral-900);
  margin-bottom: 14px;
  font-weight: 700;
}

.article-meta {
  display: flex;
  gap: 20px;
  color: var(--c-neutral-500);
  font-size: 13.5px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--c-neutral-200);
}

.article-body {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--c-neutral-700);
}

.article-summary {
  background: linear-gradient(135deg, #f0f7ff, #eef2ff);
  border-left: 4px solid var(--c-primary-500);
  padding: 16px 20px;
  margin-bottom: 28px;
  border-radius: 0 8px 8px 0;
  font-size: 15px;
  color: var(--c-neutral-700);
  line-height: 1.75;
}

.article-summary strong {
  color: var(--c-primary-700);
  font-weight: 600;
}

.article-section { margin-bottom: 28px; }

.article-heading {
  font-size: 19px;
  font-weight: 700;
  color: var(--c-primary-800);
  margin-bottom: 14px;
  padding-left: 12px;
  border-left: 4px solid var(--c-primary-500);
  font-family: var(--f-serif);
  line-height: 1.4;
}

.article-body p {
  margin-bottom: 14px;
  text-align: justify;
}

.article-body p:last-child { margin-bottom: 0; }

.article-related {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--c-neutral-200);
}

.article-related h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-neutral-800);
  margin-bottom: 16px;
}

.article-related ul { list-style: none; }

.article-related li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--c-neutral-100);
  gap: 16px;
}

.article-related li:last-child { border-bottom: none; }

.article-related a {
  color: var(--c-neutral-700);
  font-size: 14.5px;
  transition: color var(--t-fast);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.article-related a:hover {
  color: var(--c-primary-600);
}

.article-related span {
  color: var(--c-neutral-400);
  font-size: 13px;
  flex-shrink: 0;
}

body.modal-open { overflow: hidden; }

/* 文章弹层移动端适配 */
@media (max-width: 768px) {
  .article-modal-overlay { padding: 0; align-items: stretch; }
  .article-modal {
    border-radius: 0;
    transform: translateY(100%);
    max-height: 100dvh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .article-modal-overlay.show .article-modal { transform: translateY(0); }
  .article-modal-content { padding: 56px 20px 32px; }
  .article-title { font-size: 22px; line-height: 1.35; }
  .article-heading { font-size: 17px; }
  .article-body { font-size: 15px; line-height: 1.8; }
  .article-summary { font-size: 14px; padding: 14px 16px; }
  .article-meta { font-size: 13px; gap: 14px; padding-bottom: 16px; }
  .article-modal-close { top: 12px; right: 12px; width: 36px; height: 36px; }
  .article-related li { flex-direction: column; align-items: flex-start; gap: 4px; }
  .article-related a { white-space: normal; }
}

/* ---------- 独立文章详情页 ---------- */
.article-page-section {
  padding: 40px 0 80px;
  background: var(--c-neutral-50);
  min-height: calc(100vh - 80px);
}

.article-page-container {
  max-width: 860px;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--c-neutral-500);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.article-breadcrumb a {
  color: var(--c-neutral-500);
  transition: color var(--t-fast);
}

.article-breadcrumb a:hover {
  color: var(--c-primary-600);
}

.breadcrumb-sep { color: var(--c-neutral-300); }

.article-page {
  background: white;
  border-radius: 16px;
  padding: 56px 64px;
  box-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
}

.article-page-header {
  text-align: center;
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--c-neutral-200);
}

.article-page-header .article-category {
  margin-bottom: 20px;
}

.article-page-title {
  font-family: var(--f-serif);
  font-size: 32px;
  line-height: 1.35;
  color: var(--c-neutral-900);
  font-weight: 700;
  margin-bottom: 18px;
}

.article-page-meta {
  display: flex;
  justify-content: center;
  gap: 24px;
  color: var(--c-neutral-500);
  font-size: 14px;
  flex-wrap: wrap;
}

.article-page-body {
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-neutral-700);
}

.article-page-body .article-summary {
  background: linear-gradient(135deg, #f0f7ff, #eef2ff);
  border-left: 4px solid var(--c-primary-500);
  padding: 18px 24px;
  margin-bottom: 32px;
  border-radius: 0 10px 10px 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-neutral-700);
}

.article-page-body .article-section { margin-bottom: 32px; }

.article-page-body .article-heading {
  font-size: 21px;
  font-weight: 700;
  color: var(--c-primary-800);
  margin-bottom: 16px;
  padding-left: 14px;
  border-left: 4px solid var(--c-primary-500);
  font-family: var(--f-serif);
  line-height: 1.4;
}

.article-page-body p {
  margin-bottom: 16px;
  text-align: justify;
}

.article-page-body p:last-child { margin-bottom: 0; }

/* 相关推荐卡片 */
.article-related-articles {
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--c-neutral-200);
}

.article-related-articles h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-neutral-800);
  margin-bottom: 20px;
  font-family: var(--f-serif);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background: var(--c-neutral-50);
  border-radius: 10px;
  border: 1px solid var(--c-neutral-100);
  transition: all var(--t-base);
  text-decoration: none;
  color: inherit;
}

.related-card:hover {
  background: white;
  border-color: var(--c-primary-200);
  box-shadow: 0 6px 20px rgba(21, 94, 187, 0.1);
  transform: translateY(-2px);
}

.related-cat {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11.5px;
  font-weight: 600;
  align-self: flex-start;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.related-cat-company { background: #dbeafe; color: #1d4ed8; }
.related-cat-industry { background: #cffafe; color: #0e7490; }
.related-cat-research { background: #d1fae5; color: #047857; }

.related-card h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-neutral-800);
  line-height: 1.5;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card p {
  font-size: 13px;
  color: var(--c-neutral-500);
  line-height: 1.6;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-date {
  font-size: 12px;
  color: var(--c-neutral-400);
  margin-top: auto;
}
}

@media (max-width: 768px) {
  .article-page-section { padding: 20px 0 40px; }
  .article-page { padding: 32px 20px; border-radius: 12px; }
  .article-page-title { font-size: 24px; line-height: 1.4; }
  .article-page-meta { gap: 14px; font-size: 13px; }
  .article-page-body { font-size: 15px; line-height: 1.85; }
  .article-page-body .article-heading { font-size: 18px; padding-left: 10px; }
  .article-page-body .article-summary { padding: 14px 16px; font-size: 14px; }
  .related-grid { grid-template-columns: 1fr; }
  .article-related-articles h3 { font-size: 18px; }
}

/* 滚动显示动画 */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 手机端响应式 ===== */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0; right: 0;
    background: white;
    flex-direction: column;
    padding: 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    border-bottom: 1px solid #e2e8f0;
  }
  .nav-menu.mobile-open { display: flex; }
  .nav-menu a { padding: 12px 16px; font-size: 16px; }
  .nav-cta .btn-outline { display: none; }
  .hero { padding: 60px 0 50px; }
  .hero h1 { font-size: 32px !important; line-height: 1.3; }
  .service-item { flex-direction: column; gap: 16px; text-align: center; }
  .service-item-icon { margin: 0 auto; }
  .service-item-tags { justify-content: center; }
  .two-col { grid-template-columns: 1fr !important; }
  .stats-grid { grid-template-columns: repeat(2, 1fr) !important; }
  .footer-grid { grid-template-columns: 1fr !important; gap: 32px; }
  .container { padding: 0 16px; }
  .page-banner h1 { font-size: 30px !important; }
  .news-filters { flex-wrap: wrap; gap: 8px; }
  .academy-grid { grid-template-columns: 1fr !important; }
}
/* 手机端优化 */ @media (max-width:768px){ .nav-menu{ display:none; } .nav-menu.mobile-open{ display:flex !important; position:fixed; top:72px; left:0; right:0; background:#fff; flex-direction:column; padding:20px; box-shadow:0 8px 24px rgba(0,0,0,0.15); z-index:999; } .nav-menu li{ width:100%; } .nav-menu a{ padding:14px 0; border-bottom:1px solid #f0f0f0; } .news-filters{ display:flex !important; flex-wrap:wrap; gap:10px; padding:0 16px; } .news-filter-btn{ font-size:14px; padding:8px 16px; } .academy-grid{ grid-template-columns:1fr !important; gap:20px; } .service-list{ gap:20px; } .two-col{ grid-template-columns:1fr !important; } .stats-grid{ grid-template-columns:repeat(2,1fr) !important; } .footer-grid{ grid-template-columns:1fr !important; gap:30px; } .container{ padding:0 16px; } }
/* 手机端全站统一 */ @media (max-width:768px){ body{ font-size:14px; } .container{ padding:0 16px !important; max-width:100% !important; } .page-banner{ padding:60px 0 !important; } .page-banner h1{ font-size:28px !important; } .nav{ height:60px !important; } .nav-menu{ top:60px !important; } .footer{ padding:40px 0 !important; } .footer-grid{ grid-template-columns:1fr !important; gap:24px; } .section{ padding:40px 0 !important; } .two-col{ grid-template-columns:1fr !important; gap:24px; } .stats-grid{ grid-template-columns:repeat(2,1fr) !important; gap:16px; } .card-grid{ grid-template-columns:1fr !important; gap:16px; } .service-list{ gap:16px !important; } }