:root {
  --bg-body: #f8fafc;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-card-solid: #ffffff;
  --bg-nav: rgba(30, 58, 95, 0.82);
  --bg-footer: #0f1f2f;
  --bg-banner: #1e3a5f;
  --bg-tag: rgba(232, 238, 245, 0.85);
  --bg-faq: rgba(255, 255, 255, 0.78);
  --bg-table-head: #1e3a5f;
  --bg-table-row: #f1f5f9;
  --bg-input: #ffffff;
  --bg-btn: #1e3a5f;
  --bg-btn-hover: #2a4d7a;
  --text-h1: #0b1622;
  --text-h2: #17202a;
  --text-h3: #1f2937;
  --text-h4: #243447;
  --text-body: #1f2937;
  --text-aux: #334155;
  --text-link: #1e3a5f;
  --text-link-hover: #0b1622;
  --text-nav: #f1f5f9;
  --text-nav-hover: #ffffff;
  --text-footer: #cbd5e1;
  --text-footer-h: #f8fafc;
  --text-btn: #ffffff;
  --text-tag: #1f2937;
  --text-table-head: #ffffff;
  --text-table-body: #1f2937;
  --border-color: rgba(203, 213, 225, 0.7);
  --shadow: 0 4px 24px rgba(15, 31, 47, 0.08);
  --shadow-hover: 0 12px 40px rgba(15, 31, 47, 0.16);
  --glass-blur: 16px;
  --radius: 14px;
  --radius-sm: 10px;
  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --gradient-banner: linear-gradient(135deg, #1e3a5f 0%, #2a4d7a 35%, #3b82f6 70%, #6366f1 100%);
  --gradient-accent: linear-gradient(135deg, #3b82f6, #8b5cf6);
  --gradient-card: linear-gradient(160deg, rgba(255,255,255,0.9), rgba(241,245,249,0.75));
}

[data-theme="dark"] {
  --bg-body: #0b1220;
  --bg-card: rgba(30, 41, 59, 0.68);
  --bg-card-solid: #1e293b;
  --bg-nav: rgba(11, 22, 34, 0.85);
  --bg-footer: #070e18;
  --bg-banner: #0b1622;
  --bg-tag: rgba(51, 65, 85, 0.75);
  --bg-faq: rgba(30, 41, 59, 0.7);
  --bg-table-head: #0b1622;
  --bg-table-row: #1e293b;
  --bg-input: #334155;
  --bg-btn: #3b82f6;
  --bg-btn-hover: #2563eb;
  --text-h1: #f8fafc;
  --text-h2: #f1f5f9;
  --text-h3: #e5e7eb;
  --text-h4: #e2e8f0;
  --text-body: #e5e7eb;
  --text-aux: #cbd5e1;
  --text-link: #93c5fd;
  --text-link-hover: #bfdbfe;
  --text-nav: #e2e8f0;
  --text-nav-hover: #ffffff;
  --text-footer: #cbd5e1;
  --text-footer-h: #f8fafc;
  --text-btn: #ffffff;
  --text-tag: #f1f5f9;
  --text-table-head: #f8fafc;
  --text-table-body: #e5e7eb;
  --border-color: rgba(71, 85, 105, 0.6);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.55);
  --gradient-banner: linear-gradient(135deg, #0b1622 0%, #14294a 40%, #1e3a5f 75%, #2563eb 100%);
  --gradient-card: linear-gradient(160deg, rgba(30,41,59,0.85), rgba(15,23,42,0.7));
}

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

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

a:hover {
  color: var(--text-link-hover);
  text-decoration: underline;
}

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

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

/* ========== 导航栏 - 毛玻璃 ========== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-nav);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.12);
  transition: background var(--transition), box-shadow var(--transition);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  max-width: 1200px;
  margin: 0 auto;
  gap: 12px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-nav);
  white-space: nowrap;
  transition: opacity var(--transition);
}

.logo:hover {
  opacity: 0.85;
  text-decoration: none;
}

.logo svg {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
  transition: transform var(--transition);
}

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

.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text-nav);
  font-size: 0.95rem;
  padding: 8px 14px;
  border-radius: 8px;
  transition: background var(--transition), color var(--transition), transform var(--transition);
  display: block;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
  transition: width var(--transition), left var(--transition);
}

.nav-links a:hover,
.nav-links a:focus {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-nav-hover);
  text-decoration: none;
  transform: translateY(-1px);
}

.nav-links a:hover::after {
  width: 60%;
  left: 20%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle,
.menu-toggle {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: var(--text-nav);
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background var(--transition), color var(--transition), transform var(--transition);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.theme-toggle:hover,
.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.24);
  color: var(--text-nav-hover);
  transform: translateY(-2px);
}

.theme-toggle:active,
.menu-toggle:active {
  transform: translateY(0) scale(0.96);
}

.menu-toggle {
  display: none;
}

.search-box {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 10px;
  padding: 2px 4px;
  transition: background var(--transition), border-color var(--transition);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.search-box:focus-within {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.4);
}

.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-nav);
  padding: 6px 8px;
  font-size: 0.9rem;
  width: 140px;
}

.search-box input::placeholder {
  color: rgba(241, 245, 249, 0.65);
}

.search-box button {
  background: transparent;
  border: none;
  color: var(--text-nav);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: background var(--transition);
}

.search-box button:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* ========== 面包屑 ========== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.9rem;
  color: var(--text-aux);
}

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

.breadcrumb span {
  margin: 0 6px;
}

/* ========== Banner - 渐变 + 毛玻璃 ========== */
.banner {
  background: var(--gradient-banner);
  color: #ffffff;
  padding: 80px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(139, 92, 246, 0.35), transparent 55%),
    radial-gradient(circle at 80% 70%, rgba(59, 130, 246, 0.4), transparent 55%),
    radial-gradient(circle at 50% 110%, rgba(99, 102, 241, 0.3), transparent 60%);
  z-index: 1;
  animation: bannerGlow 12s ease-in-out infinite alternate;
}

.banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 22, 34, 0.15) 0%, rgba(11, 22, 34, 0.55) 100%);
  z-index: 2;
}

@keyframes bannerGlow {
  0% {
    opacity: 0.7;
    transform: scale(1);
  }
  100% {
    opacity: 1;
    transform: scale(1.08);
  }
}

.banner-content {
  position: relative;
  z-index: 3;
  max-width: 820px;
  margin: 0 auto;
  animation: fadeUp 0.9s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.banner h1 {
  font-size: 2.4rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 18px;
  line-height: 1.3;
  letter-spacing: -0.02em;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  background: linear-gradient(120deg, #ffffff 0%, #dbeafe 50%, #ffffff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.banner p {
  font-size: 1.12rem;
  color: #e2e8f0;
  margin-bottom: 28px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.banner-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 13px 32px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.btn-primary {
  background: #ffffff;
  color: #1e3a5f;
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.25);
}

.btn-primary:hover {
  background: #e2e8f0;
  color: #0b1622;
  text-decoration: none;
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(255, 255, 255, 0.35);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.55);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.18);
  color: #ffffff;
  text-decoration: none;
  transform: translateY(-3px);
  border-color: #ffffff;
  box-shadow: 0 14px 36px rgba(255, 255, 255, 0.2);
}

.carousel-dots {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 32px;
  position: relative;
  z-index: 3;
}

.carousel-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), width var(--transition);
}

.carousel-dots span.active {
  background: #ffffff;
  width: 28px;
  border-radius: 6px;
  box-shadow: 0 0 16px rgba(255, 255, 255, 0.6);
}

/* ========== 区块 ========== */
.section {
  padding: 64px 0;
  position: relative;
}

.section-alt {
  background: linear-gradient(180deg, rgba(241, 245, 249, 0.5) 0%, rgba(248, 250, 252, 0.9) 100%);
}

[data-theme="dark"] .section-alt {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.6) 0%, rgba(11, 18, 32, 0.95) 100%);
}

.section-title {
  text-align: center;
  margin-bottom: 44px;
}

.section-title h2 {
  font-size: 1.9rem;
  color: var(--text-h2);
  margin-bottom: 12px;
  font-weight: 800;
  letter-spacing: -0.02em;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 56px;
  height: 4px;
  border-radius: 4px;
  background: var(--gradient-accent);
}

.section-title p {
  color: var(--text-aux);
  font-size: 1rem;
  max-width: 640px;
  margin: 20px auto 0;
}

/* ========== 卡片网格 ========== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

/* ========== 卡片 - 毛玻璃 + 圆角 ========== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(59, 130, 246, 0.35);
}

.card:hover::before {
  opacity: 1;
}

.card h3 {
  color: var(--text-h3);
  font-size: 1.15rem;
  margin-bottom: 12px;
  font-weight: 700;
}

.card h4 {
  color: var(--text-h4);
  font-size: 1rem;
  margin-bottom: 8px;
}

.card p {
  color: var(--text-body);
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.card .meta {
  color: var(--text-aux);
  font-size: 0.85rem;
}

/* ========== 标签 ========== */
.tag {
  display: inline-block;
  background: var(--bg-tag);
  color: var(--text-tag);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  margin: 4px 6px 4px 0;
  border: 1px solid var(--border-color);
  transition: background var(--transition), transform var(--transition), color var(--transition);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.tag:hover {
  background: var(--bg-btn);
  color: var(--text-btn);
  transform: translateY(-2px);
}

/* ========== FAQ ========== */
.faq-item {
  background: var(--bg-faq);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: box-shadow var(--transition), border-color var(--transition);
}

.faq-item:hover {
  box-shadow: var(--shadow);
  border-color: rgba(59, 130, 246, 0.3);
}

.faq-q {
  padding: 16px 20px;
  font-weight: 600;
  color: var(--text-h3);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: background var(--transition), color var(--transition);
  user-select: none;
}

.faq-q:hover {
  background: var(--bg-tag);
}

.faq-q .icon {
  font-size: 1.2rem;
  transition: transform var(--transition), color var(--transition);
  color: var(--text-h3);
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-tag);
}

.faq-item.open .faq-q .icon {
  transform: rotate(45deg);
  background: var(--gradient-accent);
  color: #ffffff;
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 0 20px;
  color: var(--text-body);
  font-size: 0.95rem;
}

.faq-item.open .faq-a {
  max-height: 600px;
  padding: 0 20px 18px;
}

/* ========== 表格 ========== */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow);
}

th {
  background: var(--bg-table-head);
  color: var(--text-table-head);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-table-body);
  transition: background var(--transition);
}

tr:nth-child(even) td {
  background: var(--bg-table-row);
}

tr:hover td {
  background: rgba(59, 130, 246, 0.08);
}

/* ========== 联系信息 ========== */
.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.contact-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 22px;
  border: 1px solid var(--border-color);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.contact-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(59, 130, 246, 0.35);
}

.contact-item h4 {
  color: var(--text-h4);
  margin-bottom: 8px;
}

.contact-item p {
  color: var(--text-body);
  font-size: 0.92rem;
}

/* ========== Footer ========== */
.footer {
  background: var(--bg-footer);
  color: var(--text-footer);
  padding: 56px 24px 24px;
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-bottom: 32px;
}

.footer h4 {
  color: var(--text-footer-h);
  font-size: 1rem;
  margin-bottom: 14px;
  font-weight: 700;
}

.footer ul {
  list-style: none;
}

.footer ul li {
  margin-bottom: 8px;
}

.footer a {
  color: var(--text-footer);
  font-size: 0.9rem;
  transition: color var(--transition), padding-left var(--transition);
}

.footer a:hover {
  color: var(--text-footer-h);
  text-decoration: underline;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(203, 213, 225, 0.2);
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-footer);
}

/* ========== 返回顶部 ========== */
.back-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: var(--text-btn);
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  box-shadow: 0 8px 28px rgba(59, 130, 246, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.back-top:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 14px 36px rgba(59, 130, 246, 0.6);
}

.back-top.show {
  display: flex;
  animation: popIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes popIn {
  from {
    opacity: 0;
    transform: scale(0.5) translateY(20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* ========== 数字动画 ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 24px 16px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: transform var(--transition), box-shadow var(--transition);
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.stat-item h3 {
  font-size: 2rem;
  color: var(--text-h2);
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-item p {
  color: var(--text-aux);
  font-size: 0.9rem;
}

/* ========== 滚动动画 ========== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

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

/* ========== 文章列表 ========== */
.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.article-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 22px;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  position: relative;
  overflow: hidden;
}

.article-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.article-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-5px);
  border-color: rgba(59, 130, 246, 0.35);
}

.article-item:hover::after {
  transform: scaleX(1);
}

.article-item h3 {
  font-size: 1.05rem;
  color: var(--text-h3);
  margin-bottom: 8px;
  font-weight: 700;
  transition: color var(--transition);
}

.article-item:hover h3 {
  color: var(--text-link);
}

.article-item .date {
  font-size: 0.82rem;
  color: var(--text-aux);
  margin-bottom: 8px;
}

.article-item p {
  font-size: 0.9rem;
  color: var(--text-body);
  margin-bottom: 10px;
}

.article-item .read-more {
  font-size: 0.88rem;
  color: var(--text-link);
  font-weight: 600;
  transition: color var(--transition), letter-spacing var(--transition);
}

.article-item .read-more:hover {
  color: var(--text-link-hover);
  letter-spacing: 0.5px;
}

/* ========== HowTo ========== */
.howto-step {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  align-items: flex-start;
  padding: 16px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition);
}

.howto-step:hover {
  background: var(--bg-tag);
  transform: translateX(6px);
}

.howto-num {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: var(--text-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  box-shadow: 0 6px 18px rgba(59, 130, 246, 0.35);
}

.howto-step h4 {
  color: var(--text-h4);
  margin-bottom: 4px;
}

.howto-step p {
  color: var(--text-body);
  font-size: 0.93rem;
}

/* ========== 作者信息 ========== */
.author-box {
  display: flex;
  gap: 16px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 22px;
  margin: 32px 0;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: box-shadow var(--transition), transform var(--transition);
}

.author-box:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.author-box svg {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  border-radius: 50%;
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.35);
}

.author-box h4 {
  color: var(--text-h4);
  margin-bottom: 4px;
}

.author-box p {
  color: var(--text-aux);
  font-size: 0.88rem;
}

/* ========== 锚点导航 ========== */
.anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 32px;
}

.anchor-nav a {
  background: var(--bg-tag);
  color: var(--text-tag);
  padding: 6px 18px;
  border-radius: 20px;
  font-size: 0.88rem;
  transition: background var(--transition), color var(--transition), transform var(--transition);
  border: 1px solid var(--border-color);
}

.anchor-nav a:hover {
  background: var(--bg-btn);
  color: var(--text-btn);
  text-decoration: none;
  transform: translateY(-2px);
}

/* ========== 解决方案 ========== */
.solution-item {
  border-left: 4px solid transparent;
  border-image: var(--gradient-accent) 1;
  padding-left: 20px;
  margin-bottom: 24px;
  transition: transform var(--transition), padding-left var(--transition);
}

.solution-item:hover {
  transform: translateX(6px);
  padding-left: 26px;
}

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

.solution-item p {
  color: var(--text-body);
  font-size: 0.94rem;
}

/* ========== 客户评价 ========== */
.testimonial {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 26px;
  border: 1px solid var(--border-color);
  position: relative;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: transform var(--transition), box-shadow var(--transition);
}

.testimonial::before {
  content: '"';
  position: absolute;
  top: 8px;
  right: 20px;
  font-size: 4rem;
  line-height: 1;
  color: rgba(59, 130, 246, 0.15);
  font-family: Georgia, serif;
  font-weight: 700;
}

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

.testimonial p {
  font-style: italic;
  color: var(--text-body);
  margin-bottom: 12px;
}

.testimonial .author {
  font-weight: 600;
  color: var(--text-h4);
  font-size: 0.92rem;
}

.testimonial .role {
  color: var(--text-aux);
  font-size: 0.82rem;
}

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #3b82f6, #8b5cf6);
  border-radius: 10px;
  border: 2px solid var(--bg-body);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #2563eb, #7c3aed);
}

/* ========== 选中文本 ========== */
::selection {
  background: rgba(59, 130, 246, 0.3);
  color: var(--text-h1);
}

/* ========== 响应式 - 平板 ========== */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }

  .banner h1 {
    font-size: 2rem;
  }

  .section {
    padding: 52px 0;
  }

  .search-box input {
    width: 110px;
  }
}

/* ========== 响应式 - 移动端 ========== */
@media (max-width: 860px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-nav);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
    animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1) both;
  }

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

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

  .nav-links a {
    padding: 12px 16px;
    border-radius: 10px;
  }

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

  .menu-toggle {
    display: block;
  }

  .search-box {
    display: none;
  }

  .banner {
    padding: 56px 20px;
  }

  .banner h1 {
    font-size: 1.65rem;
  }

  .banner p {
    font-size: 1rem;
  }

  .section {
    padding: 44px 0;
  }

  .section-title h2 {
    font-size: 1.55rem;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 22px;
  }

  .author-box {
    flex-direction: column;
    text-align: center;
  }

  .back-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
}

/* ========== 响应式 - 小屏手机 ========== */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .nav-inner {
    padding: 10px 16px;
  }

  .logo {
    font-size: 1.05rem;
  }

  .logo svg {
    width: 30px;
    height: 30px;
  }

  .banner {
    padding: 44px 16px;
  }

  .banner h1 {
    font-size: 1.35rem;
  }

  .banner p {
    font-size: 0.92rem;
  }

  .banner-btns {
    flex-direction: column;
    gap: 12px;
  }

  .btn {
    width: 100%;
    text-align: center;
    padding: 12px 24px;
  }

  .section {
    padding: 36px 0;
  }

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

  .section-title h2 {
    font-size: 1.3rem;
  }

  .section-title p {
    font-size: 0.9rem;
  }

  .card {
    padding: 18px;
    border-radius: 12px;
  }

  .stat-item h3 {
    font-size: 1.6rem;
  }

  .howto-step {
    padding: 12px;
    gap: 12px;
  }

  .howto-num {
    width: 32px;
    height: 32px;
    font-size: 0.9rem;
  }

  .footer {
    padding: 40px 16px 20px;
  }

  .footer-grid {
    gap: 24px;
  }
}

/* ========== 减少动画偏好 ========== */
@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;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}

/* ========== 打印样式 ========== */
@media print {
  .navbar,
  .back-top,
  .banner-btns,
  .carousel-dots,
  .footer,
  .theme-toggle,
  .menu-toggle,
  .search-box {
    display: none !important;
  }

  body {
    background: #ffffff;
    color: #000000;
  }

  .card,
  .article-item,
  .faq-item,
  .testimonial {
    box-shadow: none;
    border: 1px solid #cccccc;
    break-inside: avoid;
  }

  .banner {
    background: #f0f0f0 !important;
    color: #000000 !important;
  }

  .banner h1 {
    -webkit-text-fill-color: #000000;
    color: #000000;
  }
}