/* ===== 基础变量 ===== */
:root {
  --color-bg: #0a0a0a;
  --color-bg-secondary: #111111;
  --color-bg-card: #161616;
  --color-bg-card-hover: #1e1e1e;
  --color-border: rgba(255, 217, 61, 0.1);
  --color-border-strong: rgba(255, 217, 61, 0.25);
  --color-primary: #FFD93D;
  --color-primary-dark: #F5A623;
  --color-primary-glow: rgba(255, 217, 61, 0.3);
  --color-text: #ffffff;
  --color-text-secondary: #b0b0b0;
  --color-text-muted: #666666;
  --color-success: #00D084;
  --color-success-glow: rgba(0, 208, 132, 0.2);
  --color-info: #45B7D1;
  --gradient-primary: linear-gradient(135deg, #FFD93D 0%, #F5A623 100%);
  --gradient-text: linear-gradient(135deg, #FFD93D 0%, #FF8C00 50%, #F5A623 100%);
  --shadow-glow: 0 0 40px rgba(255, 217, 61, 0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

.cursor-glow {
  position: fixed;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 217, 61, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 500;
  font-size: 15px;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #1a1200;
  box-shadow: 0 4px 20px rgba(255, 217, 61, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 217, 61, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #1a1200;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

/* ===== 导航 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 20px;
  color: var(--color-text);
}

.logo img {
  width: 42px;
  height: 42px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-menu a {
  font-size: 15px;
  color: var(--color-text-secondary);
  transition: var(--transition);
  position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-primary);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition);
  border-radius: 2px;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

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

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

.btn-login {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  background: transparent;
  border: 1.5px solid var(--color-border-strong);
  transition: var(--transition);
  margin-right: 8px;
}

.btn-login svg {
  width: 16px;
  height: 16px;
}

.btn-login:hover {
  background: var(--color-primary);
  color: #1a1200;
  border-color: var(--color-primary);
}

.mobile-login {
  color: var(--color-primary);
  font-weight: 700;
  display: none;
}

.mobile-login:hover {
  padding-left: 4px;
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: 
    radial-gradient(ellipse at 20% 30%, rgba(255, 217, 61, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(245, 166, 35, 0.05) 0%, transparent 50%),
    var(--color-bg);
}

.hex-grid {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='100'%3E%3Cpath d='M28 0L56 16.7v33.3L28 66.7 0 50V16.7z' fill='none' stroke='%23FFD93D' stroke-width='1'/%3E%3C/svg%3E");
  background-size: 80px 140px;
}

.particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--color-primary);
  border-radius: 50%;
  opacity: 0.4;
  animation: float 15s infinite linear;
}

@keyframes float {
  0% { transform: translateY(100vh) translateX(0); opacity: 0; }
  10% { opacity: 0.4; }
  90% { opacity: 0.4; }
  100% { transform: translateY(-100vh) translateX(50px); opacity: 0; }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 24px;
  background: rgba(255, 217, 61, 0.08);
  border: 1px solid var(--color-border-strong);
  border-radius: 50px;
  font-size: 14px;
  color: var(--color-primary);
  margin-bottom: 32px;
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(255, 217, 61, 0.7); }
  50% { opacity: 0.8; box-shadow: 0 0 0 8px rgba(255, 217, 61, 0); }
}

.hero-title {
  font-size: clamp(40px, 8vw, 72px);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

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

.hero-subtitle {
  font-size: clamp(16px, 2.5vw, 20px);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-bottom: 64px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.stat-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 24px 16px;
  text-align: center;
  transition: var(--transition);
}

.stat-item:hover {
  border-color: var(--color-border-strong);
  background: rgba(255, 217, 61, 0.03);
  transform: translateY(-4px);
}

.stat-item span:first-child,
.stat-item span:nth-child(2) {
  font-size: 32px;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
}

.stat-label {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--color-text-muted);
  font-size: 12px;
  animation: bounce 2s infinite;
}

.mouse {
  width: 22px;
  height: 36px;
  border: 2px solid var(--color-text-muted);
  border-radius: 12px;
  position: relative;
}

.mouse::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 2px;
  animation: scroll 2s infinite;
}

@keyframes scroll {
  0%, 100% { top: 8px; opacity: 1; }
  50% { top: 18px; opacity: 0; }
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-8px); }
}

/* ===== 通用区块 ===== */
.section {
  padding: 120px 0;
  position: relative;
}

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

.section-tag {
  display: inline-block;
  padding: 8px 20px;
  background: rgba(255, 217, 61, 0.08);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(32px, 5vw, 44px);
  font-weight: 900;
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-desc {
  font-size: 18px;
  color: var(--color-text-secondary);
}

/* ===== 服务 ===== */
.services {
  background: var(--color-bg-secondary);
}

.service-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  padding: 48px;
  margin-bottom: 32px;
  transition: var(--transition);
}

.service-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.service-card.reverse {
  direction: rtl;
}

.service-card.reverse > * {
  direction: ltr;
}

.service-info h3 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
}

.service-info > p {
  color: var(--color-text-secondary);
  font-size: 16px;
  margin-bottom: 32px;
}

.service-detail {
  display: grid;
  gap: 24px;
  margin-bottom: 32px;
}

.detail-block h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--color-text);
}

.detail-block ul {
  display: grid;
  gap: 10px;
}

.detail-block li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-secondary);
  font-size: 15px;
}

.detail-block li::before {
  content: '✓';
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 217, 61, 0.15);
  color: var(--color-primary);
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}

.flow-steps {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.flow-steps span {
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.flow-steps i {
  color: var(--color-primary);
  font-style: normal;
}

.result-box {
  background: rgba(0, 208, 132, 0.06);
  border: 1px solid rgba(0, 208, 132, 0.2);
  border-radius: 16px;
  padding: 20px 24px;
  margin-bottom: 24px;
}

.result-box span {
  display: block;
  font-size: 13px;
  color: var(--color-success);
  margin-bottom: 4px;
}

.result-box strong {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-success);
}

.service-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  background: linear-gradient(135deg, rgba(255, 217, 61, 0.03) 0%, rgba(245, 166, 35, 0.03) 100%);
  border-radius: 20px;
  border: 1px solid var(--color-border);
}

.visual-star,
.visual-users,
.visual-chart {
  width: 180px;
  height: 180px;
  color: var(--color-primary);
  opacity: 0.3;
  transition: var(--transition);
}

.service-card:hover .visual-star,
.service-card:hover .visual-users,
.service-card:hover .visual-chart {
  opacity: 0.6;
  transform: scale(1.05);
}

.visual-star svg,
.visual-users svg,
.visual-chart svg {
  width: 100%;
  height: 100%;
}

.compare-section {
  margin-top: 80px;
}

.compare-title {
  text-align: center;
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 32px;
}

.compare-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  background: var(--color-bg-card);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
}

.compare-table th,
.compare-table td {
  padding: 18px 24px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.compare-table th {
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(255, 217, 61, 0.05);
}

.compare-table td:first-child {
  text-align: left;
  font-weight: 500;
}

.compare-table tr:last-child td {
  border-bottom: none;
}

.check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: var(--color-primary);
  color: #1a1200;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 700;
}

/* ===== 产品中心 ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.product-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.product-card:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-8px);
  box-shadow: var(--shadow-glow);
}

.product-card.featured {
  border-color: var(--color-border-strong);
  transform: scale(1.02);
}

.product-card.featured:hover {
  transform: scale(1.02) translateY(-8px);
}

.product-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--gradient-primary);
  color: #1a1200;
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 700;
  z-index: 2;
}

.product-preview {
  position: relative;
  height: 220px;
  background: linear-gradient(135deg, rgba(255, 217, 61, 0.08) 0%, rgba(245, 166, 35, 0.05) 100%);
  overflow: hidden;
}

.preview-content {
  position: absolute;
  inset: 0;
  padding: 28px;
  background: rgba(10, 10, 10, 0.95);
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.product-card:hover .preview-content {
  opacity: 1;
  transform: translateY(0);
}

.preview-tag {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(255, 217, 61, 0.15);
  color: var(--color-primary);
  border-radius: 50px;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 16px;
  width: fit-content;
}

.preview-content h4 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 16px;
}

.preview-content ul {
  display: grid;
  gap: 10px;
}

.preview-content li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.preview-content li::before {
  content: '•';
  color: var(--color-primary);
  font-size: 20px;
}

.product-body {
  padding: 28px;
}

.product-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(255, 217, 61, 0.08);
  color: var(--color-primary);
  border-radius: 50px;
  font-size: 12px;
  margin-bottom: 12px;
}

.product-body h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 10px;
}

.product-body > p {
  color: var(--color-text-secondary);
  font-size: 14px;
  margin-bottom: 24px;
  min-height: 42px;
}

/* ===== 案例 ===== */
.cases {
  background: var(--color-bg-secondary);
}

.cases-filter {
  margin-bottom: 40px;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.filter-group span {
  color: var(--color-text-muted);
  font-size: 14px;
  margin-right: 8px;
}

.filter-btn {
  padding: 10px 20px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 50px;
  color: var(--color-text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #1a1200;
}

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

.case-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 28px;
  transition: var(--transition);
}

.case-card:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

.case-tags {
  display: flex;
  justify-content: space-between;
  margin-bottom: 16px;
  font-size: 13px;
}

.case-cat {
  color: var(--color-primary);
  font-weight: 700;
}

.case-service {
  color: var(--color-text-muted);
}

.case-card h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 12px;
}

.case-result {
  font-size: 28px;
  font-weight: 900;
  color: var(--color-success);
  margin-bottom: 12px;
  text-shadow: 0 0 20px var(--color-success-glow);
}

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

.case-tags-small {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.case-tags-small span {
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 6px;
  font-size: 12px;
  color: var(--color-text-secondary);
}

.case-link {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 14px;
  transition: var(--transition);
}

.case-link:hover {
  gap: 12px;
}

/* ===== 关于我们 ===== */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-bottom: 64px;
}

.about-story h3,
.about-timeline h3 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 24px;
  text-align: center;
}

.about-story p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
  text-align: justify;
}

.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border-strong);
}

.timeline-item {
  position: relative;
  margin-bottom: 28px;
}

.timeline-dot {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 16px;
  height: 16px;
  background: var(--color-bg);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
}

.timeline-dot.active {
  background: var(--color-primary);
  box-shadow: 0 0 16px var(--color-primary-glow);
}

.timeline-year {
  font-size: 20px;
  font-weight: 900;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.timeline-text {
  color: var(--color-text-secondary);
  font-size: 15px;
}

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

.value-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
}

.value-card:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-6px);
}

.value-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.value-card h4 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 10px;
}

.value-card p {
  color: var(--color-text-secondary);
  font-size: 14px;
}

/* ===== 新闻 ===== */
.news {
  background: var(--color-bg-secondary);
}

.news-filter {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.news-list {
  display: grid;
  gap: 20px;
}

.news-card {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 28px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 28px;
  transition: var(--transition);
}

.news-card:hover {
  border-color: var(--color-border-strong);
  transform: translateX(8px);
}

.news-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-right: 1px solid var(--color-border);
  padding-right: 28px;
}

.day {
  font-size: 48px;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
}

.ym {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.news-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.news-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(255, 217, 61, 0.08);
  color: var(--color-primary);
  border-radius: 50px;
  font-size: 12px;
  width: fit-content;
  margin-bottom: 10px;
}

.news-body h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 8px;
}

.news-body p {
  color: var(--color-text-secondary);
  font-size: 14px;
  margin-bottom: 12px;
}

.news-link {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 14px;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

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

.faq-item.active {
  border-color: var(--color-border-strong);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 24px;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  text-align: left;
}

.faq-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 217, 61, 0.08);
  color: var(--color-primary);
  border-radius: 50%;
  font-size: 20px;
  transition: var(--transition);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--color-primary);
  color: #1a1200;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer p {
  padding: 0 24px 22px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ===== 联系 ===== */
.contact {
  background: var(--color-bg-secondary);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}

.contact-info {
  display: grid;
  gap: 20px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 24px;
  transition: var(--transition);
}

.contact-card:hover {
  border-color: var(--color-border-strong);
  transform: translateX(8px);
}

.contact-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 217, 61, 0.08);
  border-radius: 12px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-icon svg {
  width: 24px;
  height: 24px;
}

.contact-card h4 {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.contact-card p {
  font-size: 17px;
  font-weight: 700;
}

.contact-form {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  padding: 40px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  color: var(--color-text);
  font-size: 15px;
  font-family: inherit;
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: rgba(255, 217, 61, 0.03);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
}

.form-group select option {
  background: var(--color-bg-card);
  color: var(--color-text);
}

.form-message {
  margin-top: 16px;
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 14px;
  display: none;
}

.form-message.success {
  display: block;
  background: rgba(0, 208, 132, 0.1);
  border: 1px solid rgba(0, 208, 132, 0.3);
  color: var(--color-success);
}

.form-message.error {
  display: block;
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid rgba(231, 76, 60, 0.3);
  color: #e74c3c;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 64px 0 24px;
}

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

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

.footer-brand p {
  color: var(--color-text-secondary);
  font-size: 14px;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  color: var(--color-text-secondary);
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #1a1200;
}

.footer-social svg {
  width: 20px;
  height: 20px;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-links a {
  display: block;
  color: var(--color-text-secondary);
  font-size: 14px;
  margin-bottom: 12px;
  transition: var(--transition);
}

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

.footer-contact p {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-secondary);
  font-size: 14px;
  margin-bottom: 12px;
}

.footer-contact svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 13px;
}

/* ===== 悬浮按钮 ===== */
.float-cta {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 56px;
  height: 56px;
  background: var(--gradient-primary);
  color: #1a1200;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(255, 217, 61, 0.3);
  z-index: 999;
  transition: var(--transition);
}

.float-cta:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 30px rgba(255, 217, 61, 0.5);
}

.float-cta svg {
  width: 26px;
  height: 26px;
}

/* ===== 动画 ===== */
[data-aos] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
  opacity: 1;
  transform: translateY(0);
}

[data-aos="fade-left"] {
  transform: translateX(30px);
}

[data-aos="fade-right"] {
  transform: translateX(-30px);
}

[data-aos="fade-left"].aos-animate,
[data-aos="fade-right"].aos-animate {
  transform: translateX(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .products-grid,
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.98);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-150%);
    opacity: 0;
    transition: var(--transition);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
  }
  
  .mobile-login {
    display: block;
  }

  .mobile-toggle {
    display: flex;
  }
  
  .nav-cta {
    display: none;
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .service-card,
  .service-card.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
    padding: 32px 24px;
  }
  
  .service-visual {
    order: -1;
    min-height: 200px;
  }
  
  .products-grid,
  .cases-grid,
  .about-values {
    grid-template-columns: 1fr;
  }
  
  .product-card.featured {
    transform: none;
  }
  
  .news-card {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .news-date {
    flex-direction: row;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding-right: 0;
    padding-bottom: 16px;
    justify-content: flex-start;
    gap: 12px;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .float-cta {
    bottom: 20px;
    right: 20px;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .section {
    padding: 80px 0;
  }
  
  .hero {
    padding: 100px 0 60px;
  }
}

/* ===== 辅助类 ===== */
.hidden {
  display: none !important;
}