:root {
  --bg-primary: #f5f7fb;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.55);
  --text-primary: #16162a;
  --text-secondary: #4b4b6e;
  --text-muted: #8a8aa8;
  --accent: #e94560;
  --accent-hover: #c73550;
  --accent-light: #fde9ee;
  --accent-glow: rgba(233, 69, 96, 0.32);
  --gradient-1: linear-gradient(135deg, #1a1a2e 0%, #e94560 100%);
  --gradient-2: linear-gradient(135deg, #16213e 0%, #0f3460 100%);
  --gradient-3: linear-gradient(135deg, #2d1b3d 0%, #e94560 100%);
  --border: rgba(22, 22, 42, 0.08);
  --border-strong: rgba(22, 22, 42, 0.14);
  --shadow: 0 8px 32px rgba(22, 22, 42, 0.08);
  --shadow-hover: 0 18px 48px rgba(22, 22, 42, 0.16);
  --radius: 18px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --header-height: 68px;
  --blur: 18px;
  --success: #2ecc71;
  --warning: #f39c12;
  --info: #3498db;
}

body.dark-mode {
  --bg-primary: #0b0b16;
  --bg-secondary: #12121f;
  --bg-card: rgba(30, 30, 54, 0.6);
  --bg-glass: rgba(24, 24, 44, 0.55);
  --text-primary: #f0f0f8;
  --text-secondary: #b6b6d4;
  --text-muted: #7c7ca0;
  --accent: #ff5c7a;
  --accent-hover: #ff7d95;
  --accent-light: rgba(255, 92, 122, 0.14);
  --accent-glow: rgba(255, 92, 122, 0.4);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 18px 48px rgba(0, 0, 0, 0.55);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  background-image:
    radial-gradient(circle at 12% 8%, var(--accent-glow), transparent 42%),
    radial-gradient(circle at 88% 92%, rgba(52, 152, 219, 0.18), transparent 46%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.75;
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.dark-mode {
  background-image:
    radial-gradient(circle at 12% 8%, rgba(255, 92, 122, 0.14), transparent 42%),
    radial-gradient(circle at 88% 92%, rgba(52, 152, 219, 0.1), transparent 46%);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.25s ease, opacity 0.25s ease;
}

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

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

button {
  font-family: inherit;
}

::selection {
  background: var(--accent);
  color: #fff;
}

.container {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ 吸顶导航 ============ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: saturate(180%) blur(var(--blur));
  -webkit-backdrop-filter: saturate(180%) blur(var(--blur));
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: box-shadow 0.35s ease, background 0.35s ease, border-color 0.35s ease;
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.6px;
  flex-shrink: 0;
}

.logo svg {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  filter: drop-shadow(0 4px 12px var(--accent-glow));
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.logo:hover svg {
  transform: rotate(-10deg) scale(1.08);
}

.logo span {
  color: var(--accent);
}

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

.nav a {
  position: relative;
  padding: 9px 15px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease;
  white-space: nowrap;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 3px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transform: translateX(-50%);
  transition: width 0.3s ease;
}

.nav a:hover {
  background: var(--accent-light);
  color: var(--accent);
  transform: translateY(-2px);
}

.nav a:hover::after {
  width: 40%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-glass);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  padding: 0 4px 0 16px;
  height: 40px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-light);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  color: var(--text-primary);
  font-size: 0.85rem;
  width: 140px;
  font-family: inherit;
}

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

.search-box button {
  background: var(--accent);
  border: none;
  color: #fff;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.25s ease, transform 0.25s ease;
  flex-shrink: 0;
}

.search-box button:hover {
  background: var(--accent-hover);
  transform: scale(1.08);
}

.theme-toggle {
  background: var(--bg-glass);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background 0.25s ease, color 0.25s ease, transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: var(--accent-light);
  color: var(--accent);
  transform: rotate(25deg) scale(1.06);
}

.mobile-menu-btn {
  display: none;
  background: var(--bg-glass);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.25s ease, color 0.25s ease;
}

.mobile-menu-btn:hover {
  background: var(--accent-light);
  color: var(--accent);
}

/* ============ 移动菜单 ============ */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--bg-glass);
  backdrop-filter: saturate(180%) blur(var(--blur));
  -webkit-backdrop-filter: saturate(180%) blur(var(--blur));
  border-bottom: 1px solid var(--border);
  padding: 14px 20px 18px;
  z-index: 999;
  flex-direction: column;
  gap: 4px;
  box-shadow: var(--shadow);
  animation: slideDown 0.35s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav a {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 500;
  transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

.mobile-nav a:hover {
  background: var(--accent-light);
  color: var(--accent);
  transform: translateX(6px);
}

/* ============ Banner 轮播 ============ */
.banner {
  margin-top: var(--header-height);
  position: relative;
  overflow: hidden;
  background: var(--bg-secondary);
}

.banner-slider {
  display: flex;
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  height: 460px;
}

.banner-slide {
  min-width: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.banner-slide .slide-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  transition: transform 8s ease;
}

.banner-slide:hover .slide-bg {
  transform: scale(1.05);
}

.banner-slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10, 10, 20, 0.55) 0%, rgba(10, 10, 20, 0.15) 60%, transparent 100%);
  z-index: 0;
}

.banner-slide .slide-content {
  position: relative;
  z-index: 1;
  max-width: 1220px;
  width: 100%;
  padding: 0 48px;
  color: #fff;
  animation: fadeUp 0.9s ease both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.banner-slide .slide-content h2 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 18px;
  line-height: 1.22;
  letter-spacing: -1.2px;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.banner-slide .slide-content p {
  font-size: 1.12rem;
  opacity: 0.94;
  max-width: 620px;
  margin-bottom: 28px;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
}

.banner-slide .slide-content .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 1rem;
  transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  border: none;
  cursor: pointer;
  box-shadow: 0 10px 30px var(--accent-glow);
}

.banner-slide .slide-content .btn:hover {
  background: var(--accent-hover);
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 16px 40px var(--accent-glow);
  color: #fff;
}

.banner-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 2;
}

.banner-dots button {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.6);
  background: transparent;
  cursor: pointer;
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease, width 0.3s ease;
  padding: 0;
}

.banner-dots button.active {
  background: #fff;
  border-color: #fff;
  width: 30px;
  border-radius: var(--radius-pill);
}

.banner-dots button:hover {
  transform: scale(1.2);
}

.banner-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  transition: background 0.3s ease, transform 0.3s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.banner-arrow:hover {
  background: rgba(255, 255, 255, 0.32);
  transform: translateY(-50%) scale(1.08);
}

.banner-arrow.prev {
  left: 20px;
}

.banner-arrow.next {
  right: 20px;
}

/* ============ 数字统计 ============ */
.stats-bar {
  background: var(--bg-glass);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border-bottom: 1px solid var(--border);
  padding: 40px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  position: relative;
  padding: 8px;
}

.stat-item .stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), #ff8fa3);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  letter-spacing: -1px;
}

.stat-item .stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ============ 通用区块 ============ */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--bg-glass);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
}

.section-header {
  text-align: center;
  margin-bottom: 52px;
}

.section-header h2 {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 660px;
  margin: 0 auto;
}

.section-header .accent-line {
  width: 64px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), #ff8fa3);
  border-radius: var(--radius-pill);
  margin: 18px auto 0;
  box-shadow: 0 4px 14px var(--accent-glow);
}

/* ============ 卡片网格 ============ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease, border-color 0.4s ease;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #ff8fa3);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s ease;
}

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

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.4s ease;
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(-6deg);
  background: var(--accent);
  color: #fff;
}

.card h3 {
  font-size: 1.18rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ============ 文章列表 ============ */
.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.article-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease, border-color 0.4s ease;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.article-card::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--accent-light);
  opacity: 0;
  transition: opacity 0.4s ease, transform 0.4s ease;
  z-index: 0;
}

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

.article-card:hover::after {
  opacity: 0.6;
  transform: scale(1.2);
}

.article-card > * {
  position: relative;
  z-index: 1;
}

.article-card .article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-card .article-meta .tag {
  background: var(--accent-light);
  color: var(--accent);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.75rem;
  transition: background 0.3s ease, color 0.3s ease;
}

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

.article-card h3 {
  font-size: 1.14rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
  line-height: 1.45;
  transition: color 0.3s ease;
}

.article-card:hover h3 {
  color: var(--accent);
}

.article-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  flex: 1;
  margin-bottom: 16px;
  line-height: 1.75;
}

.article-card .read-more {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s ease;
}

.article-card .read-more:hover {
  gap: 12px;
}

/* ============ FAQ ============ */
.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  transition: border-color 0.35s ease, box-shadow 0.35s ease, transform 0.35s ease;
}

.faq-item:hover {
  box-shadow: var(--shadow);
}

.faq-item.open {
  border-color: var(--accent);
  box-shadow: 0 10px 34px var(--accent-glow);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  font-family: inherit;
  gap: 16px;
  transition: background 0.3s ease, color 0.3s ease;
}

.faq-question:hover {
  background: var(--accent-light);
  color: var(--accent);
}

.faq-question .faq-icon {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.35s ease, color 0.35s ease;
}

.faq-item.open .faq-icon {
  transform: rotate(135deg);
  background: var(--accent);
  color: #fff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease, padding 0.35s ease, opacity 0.35s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.85;
  opacity: 0;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding: 0 24px 22px;
  opacity: 1;
}

/* ============ HowTo ============ */
.howto-steps {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.howto-step {
  display: flex;
  gap: 22px;
  position: relative;
  padding-bottom: 36px;
}

.howto-step:last-child {
  padding-bottom: 0;
}

.howto-step .step-num {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #ff8fa3);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  box-shadow: 0 8px 22px var(--accent-glow);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.howto-step:hover .step-num {
  transform: scale(1.12) rotate(-8deg);
}

.howto-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 46px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), transparent);
  opacity: 0.4;
}

.howto-step .step-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.howto-step .step-body p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============ 案例 & 评价 ============ */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.case-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  box-shadow: var(--shadow);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease, border-color 0.4s ease;
  overflow: hidden;
}

.case-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.case-card .case-tag {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 16px;
  transition: background 0.3s ease, color 0.3s ease;
}

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

.case-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.case-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.testimonial-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  box-shadow: var(--shadow);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease, border-color 0.4s ease;
}

.testimonial-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.testimonial-card .quote-mark {
  font-size: 3.4rem;
  color: var(--accent);
  opacity: 0.18;
  line-height: 1;
  margin-bottom: -14px;
  font-family: Georgia, serif;
}

.testimonial-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-style: italic;
  line-height: 1.8;
}

.testimonial-card .author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.testimonial-card .author .avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #ff8fa3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 1.05rem;
  flex-shrink: 0;
  box-shadow: 0 6px 18px var(--accent-glow);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.testimonial-card:hover .author .avatar {
  transform: scale(1.1);
}

.testimonial-card .author .info .name {
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--text-primary);
}

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

/* ============ 新闻 ============ */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  box-shadow: var(--shadow);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease, border-color 0.4s ease;
}

.news-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.news-card .news-thumb {
  height: 170px;
  overflow: hidden;
  position: relative;
}

.news-card .news-thumb svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.news-card:hover .news-thumb svg {
  transform: scale(1.08);
}

.news-card .news-body {
  padding: 22px;
}

.news-card .news-body .news-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.news-card .news-body h3 {
  font-size: 1.02rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.45;
  color: var(--text-primary);
  transition: color 0.3s ease;
}

.news-card:hover .news-body h3 {
  color: var(--accent);
}

.news-card .news-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ============ 联系 & 信息 ============ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 34px;
}

.contact-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px;
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  box-shadow: var(--shadow);
}

.contact-info h3 {
  font-size: 1.22rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
  transition: transform 0.3s ease;
}

.contact-item:hover {
  transform: translateX(6px);
}

.contact-item .ci-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.3s ease, color 0.3s ease, transform 0.3s ease;
}

.contact-item:hover .ci-icon {
  background: var(--accent);
  color: #fff;
  transform: scale(1.08);
}

.contact-item .ci-body .ci-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.contact-item .ci-body .ci-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.contact-item .ci-body .ci-value a {
  color: var(--accent);
}

.trust-badges {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.trust-badge {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 24px 18px;
  text-align: center;
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  box-shadow: var(--shadow);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease, border-color 0.4s ease;
}

.trust-badge:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.trust-badge .badge-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
  transition: background 0.3s ease, color 0.3s ease, transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.trust-badge:hover .badge-icon {
  background: var(--accent);
  color: #fff;
  transform: rotate(-8deg) scale(1.08);
}

.trust-badge h4 {
  font-size: 0.94rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.trust-badge p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============ 面包屑 ============ */
.breadcrumb {
  padding: 18px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color 0.25s ease;
}

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

.breadcrumb .sep {
  color: var(--text-muted);
  opacity: 0.6;
}

/* ============ 页脚 ============ */
.footer {
  background: var(--bg-glass);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 44px;
  padding-bottom: 44px;
}

.footer-brand h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.footer-brand h3 span {
  color: var(--accent);
}

.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.8;
}

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

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.footer-social a:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  transform: translateY(-4px) scale(1.08);
}

.footer-col h4 {
  font-size: 0.96rem;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--text-primary);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul li a {
  font-size: 0.86rem;
  color: var(--text-secondary);
  transition: color 0.25s ease, padding-left 0.25s ease;
  display: inline-block;
}

.footer-col ul li a:hover {
  color: var(--accent);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 26px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

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

.footer-bottom .links a {
  color: var(--text-muted);
  transition: color 0.25s ease;
}

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

/* ============ 返回顶部 ============ */
.back-to-top {
  position: fixed;
  bottom: 36px;
  right: 36px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #ff8fa3);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 26px var(--accent-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: opacity 0.35s ease, transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), visibility 0.35s ease;
  z-index: 900;
}

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

.back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 14px 36px var(--accent-glow);
}

/* ============ 滚动动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

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

.card.reveal.visible:hover,
.article-card.reveal.visible:hover,
.case-card.reveal.visible:hover,
.news-card.reveal.visible:hover,
.testimonial-card.reveal.visible:hover,
.trust-badge.reveal.visible:hover {
  transition-delay: 0s;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .banner-slide .slide-content h2 {
    font-size: 2.3rem;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }
  .nav {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
  .search-box {
    display: none;
  }
  .banner-slider {
    height: 380px;
  }
  .banner-slide .slide-content {
    padding: 0 28px;
  }
  .banner-slide .slide-content h2 {
    font-size: 1.75rem;
  }
  .banner-slide .slide-content p {
    font-size: 0.95rem;
  }
  .banner-slide .slide-content .btn {
    padding: 12px 28px;
    font-size: 0.92rem;
  }
  .banner-arrow {
    display: none;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .stat-item .stat-number {
    font-size: 1.9rem;
  }
  .card-grid,
  .article-grid,
  .case-grid,
  .testimonial-grid,
  .news-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .section {
    padding: 56px 0;
  }
  .section-header h2 {
    font-size: 1.6rem;
  }
  .section-header p {
    font-size: 0.95rem;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .footer-bottom .links {
    justify-content: center;
  }
  .trust-badges {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .header-inner {
    padding: 0 16px;
  }
  .logo {
    font-size: 1.2rem;
  }
  .logo svg {
    width: 32px;
    height: 32px;
  }
  .banner-slider {
    height: 340px;
  }
  .banner-slide .slide-content {
    padding: 0 20px;
  }
  .banner-slide .slide-content h2 {
    font-size: 1.45rem;
  }
  .banner-slide .slide-content p {
    font-size: 0.88rem;
    margin-bottom: 20px;
  }
  .stat-item .stat-number {
    font-size: 1.55rem;
  }
  .stat-item .stat-label {
    font-size: 0.8rem;
  }
  .card,
  .article-card,
  .case-card,
  .testimonial-card,
  .contact-info {
    padding: 22px;
  }
  .section-header h2 {
    font-size: 1.4rem;
  }
  .faq-question {
    padding: 16px 18px;
    font-size: 0.94rem;
  }
  .faq-answer {
    padding: 0 18px;
    font-size: 0.9rem;
  }
  .faq-item.open .faq-answer {
    padding: 0 18px 18px;
  }
  .howto-step .step-num {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  .howto-step:not(:last-child)::before {
    left: 19px;
    top: 40px;
  }
  .trust-badges {
    grid-template-columns: 1fr;
  }
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
}

@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;
  }
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .header,
  .mobile-nav,
  .stats-bar,
  .section-alt,
  .card,
  .article-card,
  .case-card,
  .testimonial-card,
  .news-card,
  .contact-info,
  .trust-badge,
  .faq-item,
  .footer {
    background: var(--bg-secondary);
  }
  .search-box,
  .theme-toggle,
  .mobile-menu-btn {
    background: var(--bg-primary);
  }
  .banner-arrow {
    background: rgba(0, 0, 0, 0.3);
  }
}