/* ============================================================
   晴选网络科技 - 企业官网设计系统
   设计理念：简约大气、科技感、专业可靠
   ============================================================ */

/* ---------- 设计令牌 (Design Tokens) ---------- */
:root {
  /* 主色系 - 科技蓝 */
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-light: #3B82F6;
  --primary-lighter: #DBEAFE;
  --accent: #06B6D4;
  --accent-light: #67E8F9;

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);
  --gradient-hero: linear-gradient(135deg, #1E3A8A 0%, #2563EB 50%, #06B6D4 100%);
  --gradient-accent: linear-gradient(135deg, #06B6D4 0%, #2563EB 100%);
  --gradient-dark: linear-gradient(180deg, #0F172A 0%, #1E293B 100%);

  /* 中性色 */
  --dark: #0F172A;
  --gray-900: #1E293B;
  --gray-800: #334155;
  --gray-700: #475569;
  --gray-600: #64748B;
  --gray-500: #94A3B8;
  --gray-400: #CBD5E1;
  --gray-300: #E2E8F0;
  --gray-200: #F1F5F9;
  --gray-100: #F8FAFC;
  --white: #FFFFFF;

  /* 功能色 */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;

  /* 字体 */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* 间距 */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
  --shadow-2xl: 0 25px 50px -12px rgba(15, 23, 42, 0.15);
  --shadow-glow: 0 0 30px rgba(37, 99, 235, 0.15);

  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* 布局 */
  --container-max: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

ul,
ol {
  list-style: none;
}

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

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

/* ---------- 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--dark);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p { color: var(--gray-600); }

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.section {
  padding: 100px 0;
  position: relative;
}

.section-sm {
  padding: 64px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-header .eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-lighter);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.0625rem;
  color: var(--gray-600);
}

.grid {
  display: grid;
  gap: 32px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px -8px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
  background: var(--white);
  color: var(--primary);
  border: 2px solid var(--gray-300);
}

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

.btn-ghost {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-lg {
  padding: 18px 40px;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 10px 24px;
  font-size: 0.875rem;
}

/* ---------- 导航栏 ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  transition: all var(--transition-base);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
}

.header.scrolled {
  box-shadow: var(--shadow-md);
  border-bottom-color: var(--gray-300);
}

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

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--dark);
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  color: var(--white);
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text .brand {
  font-size: 1.125rem;
}

.logo-text .tag {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--gray-500);
  letter-spacing: 0.05em;
}

/* 导航菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-menu a {
  padding: 8px 18px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--gray-700);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-menu a:hover {
  color: var(--primary);
  background: var(--primary-lighter);
}

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

.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--primary);
  border-radius: var(--radius-full);
}

.nav-cta {
  margin-left: 12px;
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--dark);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ---------- Hero 区域 ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--header-height) 0 80px;
  background: var(--gradient-hero);
  overflow: hidden;
}

/* Hero 背景装饰 */
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

/* Hero 网格背景 */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
}

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

.hero-content {
  max-width: 640px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--accent-light);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero h1 {
  color: var(--white);
  margin-bottom: 24px;
  font-size: clamp(2.25rem, 5.5vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, #67E8F9, #A78BFA);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1875rem;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 40px;
  max-width: 520px;
  line-height: 1.8;
}

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

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat .number {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}

.hero-stat .label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 8px;
}

/* ---------- 卡片组件 ---------- */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-lighter);
}

.card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  background: var(--primary-lighter);
  color: var(--primary);
  transition: all var(--transition-base);
}

.card:hover .card-icon {
  background: var(--gradient-primary);
  color: var(--white);
  transform: scale(1.08);
}

.card h3 {
  margin-bottom: 12px;
  font-size: 1.25rem;
}

.card p {
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* 服务卡片 - 带编号 */
.service-card {
  position: relative;
  padding: 40px 32px;
}

.service-card .number {
  position: absolute;
  top: 24px;
  right: 32px;
  font-size: 3rem;
  font-weight: 800;
  color: var(--gray-200);
  line-height: 1;
  transition: color var(--transition-base);
}

.service-card:hover .number {
  color: var(--primary-lighter);
}

/* ---------- 特性区域 ---------- */
.features {
  background: var(--gray-100);
}

.feature-item {
  display: flex;
  gap: 20px;
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.feature-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateX(4px);
}

.feature-item .icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--primary-lighter);
  color: var(--primary);
  flex-shrink: 0;
}

.feature-item h4 {
  margin-bottom: 6px;
  color: var(--dark);
}

.feature-item p {
  font-size: 0.9375rem;
}

/* ---------- 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: var(--gray-300);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  padding: 0 48px 56px;
  width: 50%;
}

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

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

.timeline-item::before {
  content: '';
  position: absolute;
  top: 6px;
  width: 16px;
  height: 16px;
  background: var(--white);
  border: 3px solid var(--primary);
  border-radius: 50%;
  z-index: 1;
}

.timeline-item:nth-child(odd)::before {
  right: -8px;
}

.timeline-item:nth-child(even)::before {
  left: -8px;
}

.timeline-year {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.timeline-item h4 {
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 0.9375rem;
}

/* ---------- 技术栈 ---------- */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 20px;
}

.tech-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 28px 16px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-base);
}

.tech-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-lighter);
}

.tech-item .tech-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--white);
}

.tech-item .tech-name {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--gray-800);
}

.tech-item .tech-desc {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

/* ---------- 流程步骤 ---------- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.process-step {
  position: relative;
  padding: 36px 28px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.process-step:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-lighter);
}

.process-step .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--gradient-primary);
  color: var(--white);
  font-weight: 700;
  font-size: 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.process-step h4 {
  margin-bottom: 10px;
}

.process-step p {
  font-size: 0.9375rem;
}

/* 步骤连接箭头 */
.process-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 56px;
  right: -16px;
  width: 24px;
  height: 2px;
  background: var(--gray-300);
  z-index: 1;
}

/* ---------- CTA 区域 ---------- */
.cta-section {
  position: relative;
  padding: 80px 0;
  background: var(--gradient-dark);
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.2) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-section .container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta-section h2 {
  color: var(--white);
  margin-bottom: 12px;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.0625rem;
}

/* ---------- 表单 ---------- */
.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 8px;
}

.form-group label .required {
  color: var(--error);
}

.form-control {
  width: 100%;
  padding: 14px 18px;
  font-size: 1rem;
  color: var(--dark);
  background: var(--white);
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-control::placeholder {
  color: var(--gray-500);
}

textarea.form-control {
  resize: vertical;
  min-height: 140px;
}

/* 联系信息卡片 */
.contact-info-card {
  display: flex;
  gap: 20px;
  padding: 28px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.contact-info-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-lighter);
}

.contact-info-card .icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--primary-lighter);
  color: var(--primary);
  flex-shrink: 0;
}

.contact-info-card .label {
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-bottom: 4px;
}

.contact-info-card .value {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--dark);
}

.contact-info-card .sub {
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-top: 4px;
}

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item:hover {
  border-color: var(--gray-400);
}

.faq-question {
  width: 100%;
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--dark);
  text-align: left;
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-question .icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--gray-100);
  color: var(--gray-600);
  flex-shrink: 0;
  transition: all var(--transition-base);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

.faq-answer p {
  padding: 0 28px 24px;
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.8;
}

/* ---------- 页面头部 (子页面) ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--header-height) + 80px) 0 80px;
  background: var(--gradient-hero);
  text-align: center;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.12) 0%, transparent 70%);
  border-radius: 50%;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.12) 0%, transparent 70%);
  border-radius: 50%;
}

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

.page-hero .eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
}

.page-hero h1 {
  color: var(--white);
  margin-bottom: 16px;
}

.page-hero p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.125rem;
  max-width: 560px;
  margin: 0 auto;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  font-size: 0.875rem;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-fast);
}

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

.breadcrumb .separator {
  color: rgba(255, 255, 255, 0.3);
}

.breadcrumb .current {
  color: var(--white);
}

/* ---------- 关于页面 - 使命愿景 ---------- */
.mv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.mv-card {
  padding: 48px;
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.mv-card.mission {
  background: var(--gradient-primary);
  color: var(--white);
}

.mv-card.vision {
  background: var(--gradient-accent);
  color: var(--white);
}

.mv-card .mv-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.mv-card h3 {
  color: var(--white);
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.mv-card p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1rem;
  line-height: 1.8;
}

/* 价值观卡片 */
.value-card {
  text-align: center;
  padding: 40px 28px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.value-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-lighter);
}

.value-card .value-icon {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  border-radius: var(--radius-lg);
  background: var(--primary-lighter);
  color: var(--primary);
  transition: all var(--transition-base);
}

.value-card:hover .value-icon {
  background: var(--gradient-primary);
  color: var(--white);
  transform: scale(1.1);
}

.value-card h4 {
  margin-bottom: 12px;
  font-size: 1.1875rem;
}

.value-card p {
  font-size: 0.9375rem;
}

/* ---------- 服务页面 - 案例展示 ---------- */
.case-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

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

.case-card .case-banner {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.case-card .case-banner .case-emoji {
  font-size: 3rem;
  opacity: 0.9;
  transition: transform var(--transition-slow);
}

.case-card:hover .case-banner .case-emoji {
  transform: scale(1.15);
}

.case-card .case-body {
  padding: 28px;
}

.case-card .case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.case-card .case-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--primary-lighter);
  color: var(--primary);
}

.case-card h4 {
  margin-bottom: 8px;
  font-size: 1.1875rem;
}

.case-card p {
  font-size: 0.9375rem;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--dark);
  color: var(--gray-400);
  padding: 80px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 64px;
}

.footer-brand .logo {
  color: var(--white);
  margin-bottom: 20px;
}

.footer-brand p {
  color: var(--gray-500);
  font-size: 0.9375rem;
  line-height: 1.8;
  max-width: 320px;
}

.footer-col h5 {
  color: var(--white);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 0.9375rem;
  color: var(--gray-400);
  transition: color var(--transition-fast);
}

.footer-col ul li a:hover {
  color: var(--white);
}

.footer-contact li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 16px;
  font-size: 0.9375rem;
  color: var(--gray-400);
}

.footer-contact li svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--gray-500);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.875rem;
  color: var(--gray-500);
}

.footer-bottom a {
  color: var(--gray-400);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

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

.footer-icp {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- 滚动动画 ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ---------- 返回顶部按钮 ---------- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-full);
  color: var(--primary);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 999;
  box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
  transform: translateY(-4px);
}

/* ---------- 响应式 ---------- */
@media (max-width: 968px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .process-step:nth-child(2)::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta-section .container { flex-direction: column; text-align: center; }
  .mv-grid { grid-template-columns: 1fr; }
  .timeline::before { left: 20px; }
  .timeline-item { width: 100%; padding-left: 56px; padding-right: 0; text-align: left !important; }
  .timeline-item:nth-child(odd) { left: 0; text-align: left; }
  .timeline-item:nth-child(even) { left: 0; }
  .timeline-item::before { left: 12px !important; right: auto !important; }
}

@media (max-width: 768px) {
  .menu-toggle { display: flex; }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    padding: calc(var(--header-height) + 24px) 24px 24px;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    transition: right var(--transition-base);
    gap: 8px;
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-menu a {
    padding: 14px 18px;
    border-radius: var(--radius-md);
  }

  .nav-menu a.active::after { display: none; }

  .nav-cta {
    margin-left: 0;
    margin-top: 12px;
  }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .process-step::after { display: none; }

  .section { padding: 64px 0; }
  .hero { min-height: auto; padding: calc(var(--header-height) + 40px) 0 60px; }
  .hero-stats { flex-wrap: wrap; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .back-to-top { bottom: 20px; right: 20px; }

  .section-header { margin-bottom: 40px; }
  .card { padding: 24px; }
  .mv-card { padding: 32px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { flex-direction: column; gap: 24px; }
  .logo-text .tag { display: none; }
}