:root {
  --brand-primary: #1a1a2e;
  --brand-secondary: #16213e;
  --brand-accent: #e94560;
  --brand-accent-light: #ff6b6b;
  --brand-warm: #f9a826;
  --brand-teal: #0f3460;
  --brand-mint: #53a8b6;
  --brand-soft: #f2f6fc;
  --text-dark: #1e1e2f;
  --text-mid: #3d3d5c;
  --text-light: #7a7a9a;
  --bg-white: #ffffff;
  --bg-soft: #f7f9fd;
  --border-light: #e4e9f2;
  --shadow-sm: 0 2px 12px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 8px 30px rgba(26, 26, 46, 0.10);
  --shadow-lg: 0 20px 50px rgba(26, 26, 46, 0.14);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-stack);
  color: var(--text-dark);
  background-color: var(--bg-white);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
  padding-top: 72px;
  transition: background-color 0.4s ease, color 0.4s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.dark-mode {
  --brand-primary: #0d0d1a;
  --brand-secondary: #12122a;
  --brand-soft: #1a1a2e;
  --bg-white: #0f0f1e;
  --bg-soft: #141428;
  --text-dark: #eaeaf5;
  --text-mid: #b8b8d0;
  --text-light: #8888a8;
  --border-light: #2a2a45;
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.5);
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: var(--font-stack);
}

::selection {
  background: rgba(233, 69, 96, 0.2);
  color: var(--brand-accent);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-soft);
}

::-webkit-scrollbar-thumb {
  background: var(--border-light);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-light);
}

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

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 72px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: var(--transition);
}

body.dark-mode .navbar {
  background: rgba(15, 15, 30, 0.92);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--brand-primary);
  letter-spacing: -0.5px;
}

body.dark-mode .nav-logo {
  color: #eaeaf5;
}

.nav-logo .logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand-accent), var(--brand-warm));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
}

.nav-logo:hover .logo-mark {
  transform: rotate(-8deg) scale(1.05);
  box-shadow: 0 6px 18px rgba(233, 69, 96, 0.4);
}

.nav-logo .logo-mark svg {
  width: 22px;
  height: 22px;
  fill: #fff;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-mid);
  position: relative;
  padding: 4px 0;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--brand-accent);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-accent);
  transition: var(--transition);
  border-radius: 2px;
}

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

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

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-soft);
  border-radius: 24px;
  padding: 6px 14px;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.search-box:focus-within {
  border-color: var(--brand-accent);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.1);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.88rem;
  color: var(--text-dark);
  width: 130px;
  font-family: var(--font-stack);
}

.search-box input::placeholder {
  color: var(--text-light);
}

.search-box button {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  padding: 2px;
  transition: var(--transition);
}

.search-box button:hover svg {
  stroke: var(--brand-accent);
}

.search-box button svg {
  width: 18px;
  height: 18px;
  stroke: var(--text-light);
  fill: none;
  stroke-width: 2;
  transition: var(--transition);
}

.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border-light);
  background: var(--bg-soft);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  stroke: var(--text-mid);
  fill: none;
  stroke-width: 2;
  transition: var(--transition);
}

.theme-toggle:hover {
  background: var(--brand-accent);
  border-color: var(--brand-accent);
  transform: rotate(20deg);
}

.theme-toggle:hover svg {
  stroke: #fff;
}

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
}

body.dark-mode .mobile-menu-btn span {
  background: #eaeaf5;
}

/* ===== 面包屑 ===== */
.breadcrumb-bar {
  background: var(--bg-soft);
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  margin-top: 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-light);
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-mid);
  font-weight: 500;
}

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

.breadcrumb .sep {
  color: var(--text-light);
  user-select: none;
}

.breadcrumb .current {
  color: var(--brand-accent);
  font-weight: 600;
}

/* ===== 首屏 Banner ===== */
.hero-section {
  position: relative;
  padding: 60px 0 40px;
  background: linear-gradient(160deg, var(--brand-soft) 0%, var(--bg-white) 100%);
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -120px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(249, 168, 38, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

body.dark-mode .hero-section {
  background: linear-gradient(160deg, #12122a 0%, #0f0f1e 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--brand-primary);
  margin-bottom: 20px;
  letter-spacing: -1px;
}

body.dark-mode .hero-content h1 {
  color: #f0f0fa;
}

.hero-content h1 .highlight {
  color: var(--brand-accent);
  position: relative;
  display: inline-block;
}

.hero-content h1 .highlight::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 8px;
  background: rgba(233, 69, 96, 0.15);
  border-radius: 4px;
  z-index: -1;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-mid);
  margin-bottom: 28px;
  max-width: 520px;
  line-height: 1.85;
}

.hero-stats {
  display: flex;
  gap: 36px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.hero-stat-item .stat-number {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--brand-accent);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.hero-stat-item .stat-label {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 2px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-family: var(--font-stack);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand-accent), #c62a4a);
  color: #fff;
  box-shadow: 0 6px 20px rgba(233, 69, 96, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(233, 69, 96, 0.45);
}

.btn-primary:active {
  transform: translateY(0);
}

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

body.dark-mode .btn-outline {
  color: #eaeaf5;
  border-color: #3a3a5a;
}

.btn-outline:hover {
  border-color: var(--brand-accent);
  color: var(--brand-accent);
  transform: translateY(-2px);
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-svg-wrapper {
  width: 100%;
  max-width: 460px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: linear-gradient(145deg, #1a1a2e, #0f3460);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.hero-svg-wrapper:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 30px 70px rgba(26, 26, 46, 0.25);
}

.hero-svg-wrapper svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== 通用区块 ===== */
.section {
  padding: 72px 0;
}

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

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}

.section-header .section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--brand-accent);
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--brand-primary);
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

body.dark-mode .section-header h2 {
  color: #f0f0fa;
}

.section-header p {
  font-size: 1rem;
  color: var(--text-light);
  line-height: 1.8;
}

/* ===== 品牌介绍卡片 ===== */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.about-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

body.dark-mode .about-card {
  background: #141428;
}

.about-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-accent), var(--brand-warm));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

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

.about-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.about-card .card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(233, 69, 96, 0.12), rgba(249, 168, 38, 0.12));
  transition: var(--transition);
}

.about-card:hover .card-icon {
  transform: scale(1.08) rotate(-4deg);
}

.about-card .card-icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--brand-accent);
  fill: none;
  stroke-width: 1.8;
}

.about-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--brand-primary);
}

body.dark-mode .about-card h3 {
  color: #eaeaf5;
}

.about-card p {
  font-size: 0.92rem;
  color: var(--text-mid);
  line-height: 1.8;
}

/* ===== 产品优势 ===== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.advantage-item {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

body.dark-mode .advantage-item {
  background: #141428;
}

.advantage-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.06) 0%, transparent 70%);
  transition: var(--transition);
}

.advantage-item:hover::after {
  width: 160px;
  height: 160px;
}

.advantage-item:hover {
  border-color: var(--brand-accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-4px);
}

.advantage-item .adv-num {
  font-size: 2rem;
  font-weight: 800;
  color: rgba(233, 69, 96, 0.12);
  line-height: 1;
  margin-bottom: 12px;
  transition: var(--transition);
}

.advantage-item:hover .adv-num {
  color: rgba(233, 69, 96, 0.25);
}

.advantage-item h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--brand-primary);
}

body.dark-mode .advantage-item h4 {
  color: #eaeaf5;
}

.advantage-item p {
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.75;
}

/* ===== 解决方案 ===== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.solution-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid var(--border-light);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
}

body.dark-mode .solution-card {
  background: #141428;
}

.solution-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(233, 69, 96, 0.3);
}

.solution-card .sol-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(233, 69, 96, 0.1);
  color: var(--brand-accent);
  margin-bottom: 16px;
  width: fit-content;
  transition: var(--transition);
}

.solution-card:hover .sol-tag {
  background: var(--brand-accent);
  color: #fff;
}

.solution-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--brand-primary);
}

body.dark-mode .solution-card h3 {
  color: #eaeaf5;
}

.solution-card p {
  font-size: 0.92rem;
  color: var(--text-mid);
  line-height: 1.8;
  flex: 1;
}

/* ===== 行业应用 ===== */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
}

.industry-item {
  text-align: center;
  padding: 28px 16px;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

body.dark-mode .industry-item {
  background: #141428;
}

.industry-item:hover {
  border-color: var(--brand-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.industry-item .ind-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--brand-soft), rgba(233, 69, 96, 0.08));
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.industry-item:hover .ind-icon {
  transform: scale(1.1);
  background: linear-gradient(135deg, rgba(233, 69, 96, 0.15), rgba(249, 168, 38, 0.15));
}

.industry-item .ind-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--brand-accent);
  fill: none;
  stroke-width: 1.8;
}

.industry-item h4 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--brand-primary);
  margin-bottom: 6px;
}

body.dark-mode .industry-item h4 {
  color: #eaeaf5;
}

.industry-item p {
  font-size: 0.82rem;
  color: var(--text-light);
}

/* ===== 客户案例 ===== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.case-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

body.dark-mode .case-card {
  background: #141428;
}

.case-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.case-card .case-top {
  height: 180px;
  background: linear-gradient(135deg, #1a1a2e, #0f3460);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.case-card .case-top::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.2) 100%);
  pointer-events: none;
}

.case-card .case-top svg {
  width: 100%;
  height: 100%;
  transition: transform 0.5s ease;
}

.case-card:hover .case-top svg {
  transform: scale(1.06);
}

.case-card .case-body {
  padding: 24px;
}

.case-card .case-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--brand-primary);
}

body.dark-mode .case-card .case-body h3 {
  color: #eaeaf5;
}

.case-card .case-body p {
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.8;
}

.case-card .case-meta {
  display: flex;
  gap: 16px;
  margin-top: 16px;
  font-size: 0.8rem;
  color: var(--text-light);
}

.case-card .case-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.case-card .case-meta span::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand-accent);
}

/* ===== 客户评价 ===== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
  position: relative;
}

body.dark-mode .testimonial-card {
  background: #141428;
}

.testimonial-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-4px);
  border-color: rgba(233, 69, 96, 0.25);
}

.testimonial-card .quote-mark {
  font-size: 2.5rem;
  line-height: 1;
  color: var(--brand-accent);
  opacity: 0.3;
  font-family: Georgia, serif;
  margin-bottom: 8px;
  transition: var(--transition);
}

.testimonial-card:hover .quote-mark {
  opacity: 0.6;
}

.testimonial-card blockquote {
  font-size: 0.95rem;
  color: var(--text-mid);
  line-height: 1.85;
  margin-bottom: 18px;
  font-style: italic;
}

.testimonial-card .testi-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-card .testi-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-accent), var(--brand-warm));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
  transition: var(--transition);
}

.testimonial-card:hover .testi-avatar {
  transform: scale(1.08);
}

.testimonial-card .testi-info .name {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--brand-primary);
}

body.dark-mode .testimonial-card .testi-info .name {
  color: #eaeaf5;
}

.testimonial-card .testi-info .role {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* ===== 新闻与文章 ===== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

body.dark-mode .article-card {
  background: #141428;
}

.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--brand-accent), var(--brand-warm));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.4s ease;
}

.article-card:hover::before {
  transform: scaleY(1);
}

.article-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.article-card .art-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-light);
  margin-bottom: 14px;
}

.article-card .art-meta .art-cat {
  background: rgba(233, 69, 96, 0.1);
  color: var(--brand-accent);
  padding: 3px 10px;
  border-radius: 20px;
  font-weight: 600;
  transition: var(--transition);
}

.article-card:hover .art-meta .art-cat {
  background: var(--brand-accent);
  color: #fff;
}

.article-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--brand-primary);
  line-height: 1.5;
}

body.dark-mode .article-card h3 {
  color: #eaeaf5;
}

.article-card .art-summary {
  font-size: 0.88rem;
  color: var(--text-mid);
  line-height: 1.8;
  flex: 1;
  margin-bottom: 16px;
}

.article-card .read-more {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--brand-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
}

.article-card .read-more:hover {
  gap: 8px;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

body.dark-mode .faq-item {
  background: #141428;
}

.faq-item:hover {
  border-color: var(--brand-accent);
}

.faq-item.open {
  border-color: var(--brand-accent);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--brand-primary);
  gap: 16px;
  user-select: none;
  transition: var(--transition);
}

body.dark-mode .faq-question {
  color: #eaeaf5;
}

.faq-question .faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: 1.1rem;
  color: var(--brand-accent);
}

.faq-item.open .faq-question .faq-icon {
  transform: rotate(45deg);
  background: var(--brand-accent);
  color: #fff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 24px 22px;
}

.faq-answer p {
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.85;
}

/* ===== HowTo ===== */
.howto-steps {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
  counter-reset: step-counter;
}

.howto-step {
  display: flex;
  gap: 20px;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 26px 28px;
  transition: var(--transition);
  counter-increment: step-counter;
  position: relative;
}

body.dark-mode .howto-step {
  background: #141428;
}

.howto-step:hover {
  box-shadow: var(--shadow-sm);
  transform: translateX(6px);
  border-color: rgba(233, 69, 96, 0.3);
}

.howto-step .step-num {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--brand-accent), var(--brand-warm));
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
}

.howto-step:hover .step-num {
  transform: scale(1.08) rotate(-6deg);
  box-shadow: 0 6px 18px rgba(233, 69, 96, 0.35);
}

.howto-step .step-body h4 {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--brand-primary);
  margin-bottom: 6px;
}

body.dark-mode .howto-step .step-body h4 {
  color: #eaeaf5;
}

.howto-step .step-body p {
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.8;
}

/* ===== 联系 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.contact-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  transition: var(--transition);
}

body.dark-mode .contact-card {
  background: #141428;
}

.contact-card:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--brand-accent);
  transform: translateY(-4px);
}

.contact-card .contact-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(233, 69, 96, 0.1), rgba(249, 168, 38, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.contact-card:hover .contact-icon {
  transform: scale(1.1) rotate(-5deg);
}

.contact-card .contact-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--brand-accent);
  fill: none;
  stroke-width: 1.8;
}

.contact-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--brand-primary);
  margin-bottom: 8px;
}

body.dark-mode .contact-card h4 {
  color: #eaeaf5;
}

.contact-card p {
  font-size: 0.88rem;
  color: var(--text-mid);
  line-height: 1.7;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--brand-primary);
  color: #b8b8d0;
  padding: 56px 0 0;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

body.dark-mode .footer {
  background: #0a0a14;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
  z-index: 1;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand .footer-logo .logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--brand-accent), var(--brand-warm));
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.footer-brand .footer-logo:hover .logo-mark {
  transform: rotate(-8deg) scale(1.08);
}

.footer-brand .footer-logo .logo-mark svg {
  width: 20px;
  height: 20px;
  fill: #fff;
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.8;
  color: #8888a8;
  margin-bottom: 16px;
}

.footer-brand .footer-contact-info {
  font-size: 0.85rem;
  line-height: 2;
  color: #8888a8;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
}

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

.footer-col ul li a {
  font-size: 0.85rem;
  color: #8888a8;
  transition: var(--transition);
  display: inline-block;
}

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

.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  position: relative;
  z-index: 1;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: #6666aa;
}

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

.footer-bottom .footer-links a {
  font-size: 0.8rem;
  color: #6666aa;
}

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

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--brand-accent);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(233, 69, 96, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(233, 69, 96, 0.5);
  background: var(--brand-accent-light);
}

.back-to-top:active {
  transform: translateY(-2px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  stroke: #fff;
  fill: none;
  stroke-width: 2.5;
}

/* ===== 滚动动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  will-change: opacity, transform;
}

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

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-content h1 {
    font-size: 2.2rem;
  }

  .hero-visual {
    order: -1;
  }

  .hero-svg-wrapper {
    max-width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  body {
    padding-top: 64px;
  }

  .navbar {
    height: 64px;
  }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    background: var(--bg-white);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border-light);
    transform: translateY(-120%);
    transition: transform 0.35s ease;
    z-index: 998;
    box-shadow: var(--shadow-md);
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

  body.dark-mode .nav-links {
    background: #0f0f1e;
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-links a {
    font-size: 1rem;
    padding: 8px 0;
    width: 100%;
    border-bottom: 1px solid var(--border-light);
  }

  .nav-links a::after {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .search-box {
    display: none;
  }

  .hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-stats {
    gap: 24px;
  }

  .hero-stat-item .stat-number {
    font-size: 1.5rem;
  }

  .section {
    padding: 48px 0;
  }

  .section-header h2 {
    font-size: 1.5rem;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .howto-step {
    flex-direction: column;
    gap: 14px;
  }

  .howto-step:hover {
    transform: translateY(-4px);
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-section {
    padding: 40px 0 28px;
  }

  .hero-content h1 {
    font-size: 1.5rem;
  }

  .hero-desc {
    font-size: 0.95rem;
  }

  .hero-actions {
    flex-direction: column;
  }

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

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }

  .cases-grid {
    grid-template-columns: 1fr;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .advantages-grid {
    grid-template-columns: 1fr;
  }

  .solutions-grid {
    grid-template-columns: 1fr;
  }

  .industries-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 0.92rem;
  }

  .faq-item.open .faq-answer {
    padding: 0 18px 18px;
  }

  .howto-step {
    padding: 20px;
  }
}

/* ===== 无障碍与动效偏好 ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .navbar,
  .back-to-top,
  .theme-toggle,
  .mobile-menu-btn,
  .search-box {
    display: none !important;
  }

  body {
    padding-top: 0;
    color: #000;
    background: #fff;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}