:root {
  --c-primary: #1e3a5f;
  --c-primary-light: #2a4d6e;
  --c-primary-dark: #0d1b2a;
  --c-accent: #f7b731;
  --c-accent-warm: #e94560;
  --c-bg: #f5f8fc;
  --c-bg-alt: #eef4fa;
  --c-surface: #ffffff;
  --c-surface-glass: rgba(255, 255, 255, 0.72);
  --c-text: #1a2a3a;
  --c-text-soft: #4a6a8a;
  --c-text-muted: #7a94ad;
  --c-border: #d8e4f0;
  --c-shadow: rgba(30, 58, 95, 0.1);
  --c-shadow-lg: rgba(30, 58, 95, 0.18);
  --c-header-bg: rgba(255, 255, 255, 0.82);
  --c-footer-bg: #0d1b2a;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;
  --max-width: 1200px;
  --header-h: 68px;
  --transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-slow: 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
  --grad-hero: linear-gradient(135deg, #0d1b2a 0%, #1e3a5f 45%, #2a4d6e 100%);
  --grad-accent: linear-gradient(135deg, #f7b731 0%, #e94560 100%);
  --grad-card: linear-gradient(145deg, rgba(255,255,255,0.95), rgba(238,244,250,0.9));
  --grad-btn: linear-gradient(135deg, #1e3a5f 0%, #2a4d6e 100%);
  --grad-btn-hover: linear-gradient(135deg, #2a4d6e 0%, #1e3a5f 100%);
}

[data-theme="dark"] {
  --c-primary: #4a90d9;
  --c-primary-light: #6aabf0;
  --c-primary-dark: #0a1420;
  --c-accent: #f7b731;
  --c-accent-warm: #e94560;
  --c-bg: #0a1420;
  --c-bg-alt: #0f1e2e;
  --c-surface: #142438;
  --c-surface-glass: rgba(20, 36, 56, 0.78);
  --c-text: #e4eef8;
  --c-text-soft: #9ab4cc;
  --c-text-muted: #6a8aa8;
  --c-border: #1e3450;
  --c-shadow: rgba(0, 0, 0, 0.35);
  --c-shadow-lg: rgba(0, 0, 0, 0.55);
  --c-header-bg: rgba(10, 20, 32, 0.85);
  --c-footer-bg: #060e18;
  --grad-hero: linear-gradient(135deg, #060e18 0%, #0f1e2e 45%, #1a3050 100%);
  --grad-card: linear-gradient(145deg, rgba(20,36,56,0.95), rgba(15,30,46,0.9));
  --grad-btn: linear-gradient(135deg, #4a90d9 0%, #2a6ab0 100%);
  --grad-btn-hover: linear-gradient(135deg, #6aabf0 0%, #4a90d9 100%);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--c-primary);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}

a:hover {
  color: var(--c-accent);
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.6rem, 4vw, 2.6rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2.2vw, 1.35rem); }

p + p { margin-top: 0.75em; }

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

input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
}

::selection {
  background: var(--c-accent);
  color: #0d1b2a;
}

/* ========== 通用工具类 ========== */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 9999;
  padding: 10px 20px;
  background: var(--c-accent);
  color: #0d1b2a;
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: top var(--transition);
}

.skip-link:focus {
  top: 16px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px);
}

.section {
  padding: clamp(48px, 8vw, 96px) 0;
  position: relative;
}

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

.section-intro {
  max-width: 820px;
  margin: 0 auto 2.5rem;
  text-align: center;
  color: var(--c-text-soft);
  font-size: 1.05rem;
}

.section > .container > h2 {
  text-align: center;
  margin-bottom: 1rem;
  position: relative;
}

.section > .container > h2::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  margin: 0.8rem auto 0;
  border-radius: 4px;
  background: var(--grad-accent);
}

/* ========== 滚动动画 ========== */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.7s cubic-bezier(0.25, 0.8, 0.25, 1),
              transform 0.7s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ========== 顶部导航 ========== */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--c-header-bg);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--c-border);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

#site-header.scrolled {
  box-shadow: 0 4px 24px var(--c-shadow);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px);
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo-area a {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--c-text);
}

.logo-area svg {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  transition: transform var(--transition);
}

.logo-area a:hover svg {
  transform: rotate(-6deg) scale(1.05);
}

.site-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: var(--grad-btn);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .site-name {
  background: linear-gradient(135deg, #6aabf0, #f7b731);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.main-nav a {
  display: block;
  padding: 0.5rem 0.85rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--c-text-soft);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition), background var(--transition);
}

.main-nav a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--c-accent);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--transition);
}

.main-nav a:hover {
  color: var(--c-text);
  background: rgba(30, 58, 95, 0.06);
}

[data-theme="dark"] .main-nav a:hover {
  background: rgba(74, 144, 217, 0.12);
}

.main-nav a:hover::after {
  width: 60%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.header-actions button {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--c-text-soft);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.header-actions button:hover {
  background: rgba(30, 58, 95, 0.08);
  color: var(--c-primary);
  transform: translateY(-2px);
}

[data-theme="dark"] .header-actions button:hover {
  background: rgba(74, 144, 217, 0.15);
  color: var(--c-primary-light);
}

#mobile-menu-toggle {
  display: none;
}

/* 搜索栏 */
.search-bar {
  border-top: 1px solid var(--c-border);
  padding: 0.85rem clamp(16px, 4vw, 32px);
  background: var(--c-surface-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.search-bar form {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  gap: 0.5rem;
}

.search-bar input {
  flex: 1;
  padding: 0.7rem 1rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  background: var(--c-surface);
  color: var(--c-text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-bar input:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.12);
}

[data-theme="dark"] .search-bar input:focus {
  box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.2);
}

.search-bar button[type="submit"] {
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius-md);
  background: var(--grad-btn);
  color: #fff;
  font-weight: 700;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.search-bar button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--c-shadow-lg);
}

/* 移动端导航 */
.mobile-nav {
  border-top: 1px solid var(--c-border);
  background: var(--c-surface-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  animation: slideDown 0.3s ease;
  max-height: 70vh;
  overflow-y: auto;
}

.mobile-nav ul {
  padding: 0.5rem clamp(16px, 4vw, 32px) 1rem;
}

.mobile-nav a {
  display: block;
  padding: 0.85rem 0.5rem;
  font-weight: 600;
  color: var(--c-text-soft);
  border-bottom: 1px solid var(--c-border);
  transition: color var(--transition), padding-left var(--transition);
}

.mobile-nav a:hover {
  color: var(--c-primary);
  padding-left: 1rem;
}

/* ========== 首屏 Hero ========== */
.hero-section {
  position: relative;
  overflow: hidden;
  background: var(--grad-hero);
  color: #fff;
}

.hero-carousel {
  position: relative;
  width: 100%;
  height: clamp(260px, 42vw, 500px);
  overflow: hidden;
}

.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.9s ease;
  pointer-events: none;
}

.carousel-slide.active {
  opacity: 1;
  pointer-events: auto;
}

.hero-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.carousel-dots {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 5;
}

.carousel-dots button {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(4px);
  transition: all var(--transition);
}

.carousel-dots button.active {
  width: 34px;
  border-radius: 6px;
  background: var(--c-accent);
}

.carousel-dots button:hover {
  background: rgba(255, 255, 255, 0.7);
}

.carousel-dots button.active:hover {
  background: var(--c-accent);
}

.hero-text {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 56px) clamp(16px, 4vw, 32px) clamp(48px, 6vw, 72px);
  text-align: center;
  position: relative;
  z-index: 2;
}

.hero-text h1 {
  color: #fff;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.4);
  margin-bottom: 1rem;
  animation: fadeUp 0.8s ease both;
}

.hero-lead {
  max-width: 860px;
  margin: 0 auto 2rem;
  font-size: clamp(0.95rem, 1.6vw, 1.1rem);
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.88);
  animation: fadeUp 0.8s 0.15s ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
  animation: fadeUp 0.8s 0.3s ease both;
}

.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 0.85rem 2.2rem;
  border-radius: var(--radius-xl);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

.btn-primary {
  background: var(--grad-accent);
  color: #0d1b2a;
  box-shadow: 0 8px 28px rgba(247, 183, 49, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 38px rgba(247, 183, 49, 0.5);
  color: #0d1b2a;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.24);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: clamp(1.5rem, 5vw, 4rem);
  flex-wrap: wrap;
  animation: fadeUp 0.8s 0.45s ease both;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.stat-number {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  color: var(--c-accent);
  font-variant-numeric: tabular-nums;
  text-shadow: 0 2px 16px rgba(247, 183, 49, 0.35);
}

.stat-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 0.04em;
}

/* ========== 面包屑 ========== */
.breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem clamp(16px, 4vw, 32px) 0;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--c-text-muted);
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 0.4rem;
  color: var(--c-text-muted);
  opacity: 0.6;
}

.breadcrumb a {
  color: var(--c-text-soft);
}

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

/* ========== 关于我们 ========== */
.about-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.about-text h3 {
  margin: 1.75rem 0 0.6rem;
  color: var(--c-primary);
  position: relative;
  padding-left: 1rem;
}

.about-text h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35em;
  width: 4px;
  height: 1em;
  background: var(--grad-accent);
  border-radius: 4px;
}

.about-text h3:first-child {
  margin-top: 0;
}

.about-text p {
  color: var(--c-text-soft);
  text-align: justify;
}

.timeline {
  margin-top: 0.5rem;
}

.timeline li {
  position: relative;
  padding: 0.5rem 0 0.5rem 1.6rem;
  color: var(--c-text-soft);
  border-left: 2px solid var(--c-border);
  transition: border-color var(--transition), color var(--transition);
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 1rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-surface);
  border: 3px solid var(--c-accent);
  transition: transform var(--transition), background var(--transition);
}

.timeline li:hover {
  border-color: var(--c-accent);
  color: var(--c-text);
}

.timeline li:hover::before {
  transform: scale(1.25);
  background: var(--c-accent);
}

.timeline strong {
  color: var(--c-primary);
}

.about-visual {
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.about-visual svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 40px var(--c-shadow);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

.about-visual svg:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 20px 56px var(--c-shadow-lg);
}

/* ========== 产品/漫画分类 ========== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.product-card {
  background: var(--grad-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px var(--c-shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

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

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 18px 48px var(--c-shadow-lg);
  border-color: var(--c-accent);
}

.product-card svg {
  width: 56px;
  height: 56px;
  margin-bottom: 1rem;
  border-radius: var(--radius-md);
  transition: transform var(--transition);
}

.product-card:hover svg {
  transform: scale(1.1) rotate(-4deg);
}

.product-card h3 {
  margin-bottom: 0.5rem;
  color: var(--c-primary);
}

.product-card p {
  font-size: 0.92rem;
  color: var(--c-text-soft);
  line-height: 1.7;
}

.advantage-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.advantage-list li {
  position: relative;
  padding: 1rem 1.25rem 1rem 3rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  color: var(--c-text-soft);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.advantage-list li::before {
  content: "✓";
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--grad-accent);
  color: #0d1b2a;
  font-weight: 800;
  font-size: 0.8rem;
}

.advantage-list li:hover {
  transform: translateX(6px);
  box-shadow: 0 8px 24px var(--c-shadow);
  border-color: var(--c-accent);
}

.advantage-list strong {
  color: var(--c-text);
}

/* ========== 解决方案 ========== */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.solution-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.solution-card::after {
  content: "";
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--grad-accent);
  opacity: 0.08;
  transition: transform var(--transition-slow), opacity var(--transition);
}

.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 44px var(--c-shadow-lg);
}

.solution-card:hover::after {
  transform: scale(2.2);
  opacity: 0.14;
}

.solution-card h3 {
  color: var(--c-primary);
  margin-bottom: 0.75rem;
}

.solution-card p {
  font-size: 0.93rem;
  color: var(--c-text-soft);
}

/* ========== 行业应用 ========== */
.application-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.app-item {
  padding: 1.75rem;
  background: var(--c-surface);
  border-radius: var(--radius-lg);
  border-left: 5px solid var(--c-accent);
  box-shadow: 0 4px 18px var(--c-shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.app-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 14px 40px var(--c-shadow-lg);
  border-left-color: var(--c-accent-warm);
}

.app-item h3 {
  color: var(--c-primary);
  margin-bottom: 0.6rem;
  font-size: 1.1rem;
}

.app-item p {
  font-size: 0.92rem;
  color: var(--c-text-soft);
}

/* ========== 客户案例 ========== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}

.case-card {
  background: var(--grad-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 6px 24px var(--c-shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}

.case-card::before {
  content: "❝";
  position: absolute;
  top: 0.5rem;
  right: 1.25rem;
  font-size: 3rem;
  line-height: 1;
  color: var(--c-accent);
  opacity: 0.25;
  font-family: Georgia, serif;
}

.case-card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 20px 52px var(--c-shadow-lg);
}

.case-card h3 {
  color: var(--c-primary);
  margin-bottom: 0.85rem;
  font-size: 1.08rem;
  padding-right: 2rem;
}

.case-card p {
  font-size: 0.92rem;
  color: var(--c-text-soft);
  text-align: justify;
}

/* ========== 客户评价 ========== */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.testimonial {
  background: var(--c-surface);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  box-shadow: 0 6px 22px var(--c-shadow);
  border-top: 4px solid var(--c-accent);
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}

.testimonial:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 48px var(--c-shadow-lg);
}

.testimonial p {
  font-size: 0.95rem;
  color: var(--c-text-soft);
  font-style: italic;
  line-height: 1.8;
  margin-bottom: 1rem;
}

.testimonial footer {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-primary);
  text-align: right;
}

/* ========== 新闻中心/文章 ========== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.article-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.article-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--grad-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

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

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 44px var(--c-shadow-lg);
  border-color: var(--c-accent);
}

.article-card h3 {
  font-size: 1.05rem;
  line-height: 1.5;
}

.article-card h3 a {
  color: var(--c-text);
}

.article-card h3 a:hover {
  color: var(--c-primary);
}

.article-card time {
  font-size: 0.8rem;
  color: var(--c-text-muted);
  font-variant-numeric: tabular-nums;
}

.article-card p {
  font-size: 0.9rem;
  color: var(--c-text-soft);
  flex: 1;
}

.read-more {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--c-primary);
  align-self: flex-start;
  transition: gap var(--transition), color var(--transition);
}

.read-more:hover {
  color: var(--c-accent);
  letter-spacing: 0.02em;
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-item {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.faq-item[open] {
  border-color: var(--c-accent);
  box-shadow: 0 8px 28px var(--c-shadow);
}

.faq-item summary {
  padding: 1.1rem 1.4rem;
  font-weight: 700;
  font-size: 1rem;
  color: var(--c-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: color var(--transition), background var(--transition);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--c-bg-alt);
  color: var(--c-primary);
  font-size: 1.2rem;
  font-weight: 700;
  transition: transform var(--transition), background var(--transition), color var(--transition);
}

.faq-item[open] summary::after {
  content: "−";
  transform: rotate(180deg);
  background: var(--grad-accent);
  color: #0d1b2a;
}

.faq-item summary:hover {
  color: var(--c-primary);
  background: rgba(30, 58, 95, 0.03);
}

[data-theme="dark"] .faq-item summary:hover {
  background: rgba(74, 144, 217, 0.06);
}

.faq-answer {
  padding: 0 1.4rem 1.3rem;
  animation: fadeUp 0.35s ease;
}

.faq-answer p {
  font-size: 0.93rem;
  color: var(--c-text-soft);
  line-height: 1.85;
  text-align: justify;
}

/* ========== HowTo ========== */
.howto-steps {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.howto-step {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}

.howto-step:hover {
  transform: translateX(6px);
  box-shadow: 0 10px 32px var(--c-shadow);
}

.howto-step h3 {
  color: var(--c-primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.howto-step h3::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--grad-accent);
  flex-shrink: 0;
}

.howto-step p,
.howto-step li {
  font-size: 0.93rem;
  color: var(--c-text-soft);
}

.howto-step ol {
  counter-reset: step-counter;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.howto-step ol li {
  counter-increment: step-counter;
  position: relative;
  padding-left: 2.2rem;
}

.howto-step ol li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--grad-btn);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
}

.howto-step ul:not(.advantage-list) li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.4rem;
}

.howto-step ul:not(.advantage-list) li::before {
  content: "•";
  position: absolute;
  left: 0.3rem;
  color: var(--c-accent);
  font-weight: 800;
}

.howto-step strong {
  color: var(--c-text);
}

/* ========== 注意事项 ========== */
.notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.note-item {
  background: var(--c-surface);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  border: 1px solid var(--c-border);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.note-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 14px 40px var(--c-shadow);
  border-color: var(--c-accent);
}

.note-item h3 {
  color: var(--c-primary);
  margin-bottom: 0.85rem;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--c-bg-alt);
}

.note-item li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.5rem;
  font-size: 0.92rem;
  color: var(--c-text-soft);
}

.note-item li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--c-accent);
  font-weight: 800;
}

.note-item p {
  font-size: 0.92rem;
  color: var(--c-text-soft);
  text-align: justify;
}

/* ========== 联系我们 ========== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.contact-info,
.contact-meta {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: 0 6px 24px var(--c-shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.contact-info:hover,
.contact-meta:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 40px var(--c-shadow-lg);
}

.contact-info h3,
.contact-meta h3 {
  color: var(--c-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--c-bg-alt);
}

.contact-meta h3:not(:first-child) {
  margin-top: 1.5rem;
}

.contact-info address {
  font-style: normal;
}

.contact-info p,
.contact-meta p {
  font-size: 0.93rem;
  color: var(--c-text-soft);
  margin-bottom: 0.6rem;
}

.contact-info strong,
.contact-meta strong {
  color: var(--c-text);
}

.contact-info a {
  color: var(--c-primary);
  font-weight: 600;
}

.contact-info a:hover {
  color: var(--c-accent);
}

.contact-meta ul {
  margin-top: 0.5rem;
}

.contact-meta li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--c-text-soft);
}

.contact-meta li::before {
  content: "◆";
  position: absolute;
  left: 0;
  color: var(--c-accent);
  font-size: 0.7rem;
  top: 0.35em;
}

/* ========== 网站地图 ========== */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 2rem;
}

.sitemap-col h3 {
  color: var(--c-primary);
  margin-bottom: 1rem;
  font-size: 1.05rem;
}

.sitemap-col li {
  margin-bottom: 0.55rem;
}

.sitemap-col a {
  font-size: 0.9rem;
  color: var(--c-text-soft);
  transition: color var(--transition), padding-left var(--transition);
  display: inline-block;
}

.sitemap-col a:hover {
  color: var(--c-primary);
  padding-left: 6px;
}

/* ========== 法律声明 ========== */
.legal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.legal-item {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.legal-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px var(--c-shadow);
}

.legal-item h3 {
  color: var(--c-primary);
  margin-bottom: 0.75rem;
  font-size: 1.05rem;
}

.legal-item p {
  font-size: 0.9rem;
  color: var(--c-text-soft);
  text-align: justify;
}

/* ========== 页脚 ========== */
#site-footer {
  background: var(--c-footer-bg);
  color: rgba(255, 255, 255, 0.8);
  padding: clamp(2.5rem, 5vw, 4rem) 0 2rem;
  margin-top: 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px);
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  text-align: center;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand svg {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
}

.footer-brand p {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.5rem;
}

.footer-links a {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition), transform var(--transition);
  display: inline-block;
}

.footer-links a:hover {
  color: var(--c-accent);
  transform: translateY(-2px);
}

.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.8;
}

/* ========== 返回顶部 ========== */
#back-to-top {
  position: fixed;
  right: clamp(16px, 3vw, 28px);
  bottom: clamp(16px, 3vw, 28px);
  z-index: 900;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--grad-btn);
  color: #fff;
  box-shadow: 0 8px 28px var(--c-shadow-lg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition), visibility var(--transition);
}

#back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 14px 40px var(--c-shadow-lg);
}

#back-to-top[hidden] {
  display: none;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .main-nav {
    display: none;
  }

  #mobile-menu-toggle {
    display: flex;
  }

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

  .about-visual {
    position: static;
    max-width: 440px;
    margin: 0 auto;
  }

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

@media (max-width: 768px) {
  :root {
    --header-h: 60px;
  }

  .site-name {
    font-size: 1.1rem;
  }

  .hero-carousel {
    height: clamp(200px, 50vw, 300px);
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    max-width: 300px;
    text-align: center;
  }

  .hero-stats {
    gap: 1.5rem;
  }

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

  .product-grid,
  .solution-grid,
  .case-grid,
  .testimonial-grid,
  .article-grid,
  .notes-grid,
  .legal-grid,
  .application-list {
    grid-template-columns: 1fr;
  }

  .advantage-list {
    grid-template-columns: 1fr;
  }

  .sitemap-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .section {
    padding: 48px 0;
  }

  .faq-item summary {
    padding: 1rem 1.1rem;
    font-size: 0.95rem;
  }

  .faq-answer {
    padding: 0 1.1rem 1.1rem;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    padding: 0 14px;
  }

  .logo-area svg {
    width: 38px;
    height: 38px;
  }

  .site-name {
    font-size: 1rem;
  }

  .header-actions button {
    width: 38px;
    height: 38px;
  }

  .hero-text {
    padding-left: 14px;
    padding-right: 14px;
  }

  .hero-lead {
    font-size: 0.9rem;
  }

  .search-bar form {
    flex-direction: column;
  }

  .search-bar button[type="submit"] {
    width: 100%;
  }

  .product-card,
  .solution-card,
  .case-card,
  .testimonial,
  .article-card,
  .note-item,
  .legal-item,
  .app-item {
    padding: 1.4rem 1.2rem;
  }
}

/* ========== 打印样式 ========== */
@media print {
  #site-header,
  #back-to-top,
  .hero-cta,
  .carousel-dots,
  .header-actions {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .section {
    padding: 1.5rem 0;
  }
}