```css
/* =========================================================
   蓝颜tv轻量版 - 主样式表
   品牌：sjchabanfa.com
   ========================================================= */

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ---------- 设计变量 ---------- */
:root {
  --primary: #1a3a5c;
  --primary-deep: #12293f;
  --accent: #2e7da8;
  --accent-light: #4aa3d1;
  --accent-glow: rgba(46, 125, 168, 0.35);
  --light: #f5f8fb;
  --text: #26323d;
  --muted: #5c6b7a;
  --border: #dce4ec;
  --card: #ffffff;
  --card-glass: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.55);
  --shadow: 0 2px 12px rgba(26, 58, 92, 0.08);
  --shadow-hover: 0 14px 34px rgba(26, 58, 92, 0.16);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --gradient-hero: linear-gradient(135deg, #12293f 0%, #1a3a5c 38%, #2e7da8 100%);
  --gradient-accent: linear-gradient(135deg, #2e7da8 0%, #4aa3d1 100%);
  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

body.dark {
  --primary: #0f2033;
  --primary-deep: #0a1420;
  --accent: #4aa3d1;
  --accent-light: #6bbde6;
  --accent-glow: rgba(74, 163, 209, 0.35);
  --light: #0b1622;
  --text: #dfe7ef;
  --muted: #9aabbc;
  --border: #243447;
  --card: #132234;
  --card-glass: rgba(19, 34, 52, 0.72);
  --glass-border: rgba(120, 160, 200, 0.18);
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 14px 34px rgba(0, 0, 0, 0.55);
  --gradient-hero: linear-gradient(135deg, #060d16 0%, #0f2033 40%, #1b4a6b 100%);
}

/* ---------- 全局排版 ---------- */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background-color: var(--light);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(46, 125, 168, 0.07), transparent 42%),
    radial-gradient(circle at 88% 92%, rgba(74, 163, 209, 0.06), transparent 46%);
  background-attachment: fixed;
  line-height: 1.8;
  font-size: 16px;
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.dark {
  background-image:
    radial-gradient(circle at 12% 8%, rgba(74, 163, 209, 0.1), transparent 42%),
    radial-gradient(circle at 88% 92%, rgba(46, 125, 168, 0.08), transparent 46%);
}

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

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

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

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

/* 自定义滚动条 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent), var(--primary));
  border-radius: var(--radius-pill);
  border: 2px solid var(--light);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-light);
}

/* ---------- 布局容器 ---------- */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 顶部导航 ---------- */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--card-glass);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  transition: background var(--transition), border-color var(--transition);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 19px;
  color: var(--primary);
  letter-spacing: 0.3px;
  transition: transform var(--transition), color var(--transition);
}

.logo:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

body.dark .logo {
  color: var(--text);
}

.logo svg {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  box-shadow: 0 4px 12px var(--accent-glow);
  transition: transform var(--transition);
}

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

nav ul {
  display: flex;
  list-style: none;
  gap: 6px;
  align-items: center;
}

nav a {
  display: inline-block;
  color: var(--text);
  font-size: 14.5px;
  font-weight: 500;
  padding: 7px 12px;
  border-radius: var(--radius-pill);
  position: relative;
  transition: color var(--transition), background var(--transition);
}

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

nav a:hover {
  color: var(--accent);
  background: rgba(46, 125, 168, 0.08);
  text-decoration: none;
}

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

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

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 4px 6px 4px 14px;
  background: var(--light);
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

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

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  color: var(--text);
  width: 128px;
  font-size: 14px;
  font-family: inherit;
}

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

.search-box button {
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--accent);
  font-size: 14px;
  padding: 4px 8px;
  border-radius: var(--radius-pill);
  transition: background var(--transition), transform var(--transition);
}

.search-box button:hover {
  background: rgba(46, 125, 168, 0.14);
  transform: scale(1.08);
}

/* 图标按钮 */
.icon-btn {
  background: var(--light);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  cursor: pointer;
  font-size: 17px;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.icon-btn:hover {
  transform: rotate(18deg) scale(1.08);
  border-color: var(--accent);
  background: rgba(46, 125, 168, 0.12);
  box-shadow: 0 4px 14px var(--accent-glow);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.menu-toggle:hover {
  background: rgba(46, 125, 168, 0.12);
}

/* ---------- Hero 渐变 Banner ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
  color: #fff;
  padding: 72px 0 64px;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  top: -160px;
  right: -120px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.18), transparent 68%);
  filter: blur(6px);
  z-index: 0;
  animation: floatGlow 12s ease-in-out infinite;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -180px;
  left: -140px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74, 163, 209, 0.28), transparent 70%);
  filter: blur(10px);
  z-index: 0;
  animation: floatGlow 15s ease-in-out infinite reverse;
}

@keyframes floatGlow {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(-24px, 26px, 0) scale(1.08); }
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: 36px;
  line-height: 1.4;
  margin-bottom: 18px;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.22);
  animation: heroIn 0.7s ease both;
}

.hero p {
  font-size: 17px;
  max-width: 780px;
  opacity: 0.95;
  margin-bottom: 24px;
  animation: heroIn 0.7s 0.08s ease both;
}

@keyframes heroIn {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 26px;
  animation: heroIn 0.7s 0.16s ease both;
}

.badge {
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.32);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}

.badge:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.26);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  animation: heroIn 0.7s 0.24s ease both;
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
  will-change: transform;
}

.btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}

.btn-primary:hover {
  background: #eaf3fa;
  color: var(--primary-deep);
  text-decoration: none;
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.6);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.16);
  text-decoration: none;
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.24);
}

/* 轮播 */
.carousel {
  margin-top: 38px;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.22);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  min-height: 168px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.2);
  animation: heroIn 0.7s 0.32s ease both;
}

.slide {
  display: none;
  padding: 28px 32px 40px;
}

.slide.active {
  display: block;
  animation: fade 0.6s ease;
}

@keyframes fade {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

.slide h3 {
  font-size: 19px;
  margin-bottom: 8px;
  letter-spacing: 0.3px;
}

.slide p {
  font-size: 15px;
  opacity: 0.92;
  margin: 0;
}

.dots {
  position: absolute;
  bottom: 14px;
  right: 22px;
  display: flex;
  gap: 8px;
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), width var(--transition);
}

.dot:hover {
  background: rgba(255, 255, 255, 0.75);
  transform: scale(1.2);
}

.dot.active {
  background: #fff;
  width: 22px;
  border-radius: var(--radius-pill);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding: 16px 0;
  font-size: 14px;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--muted);
  transition: color var(--transition);
}

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

.breadcrumb span {
  margin: 0 6px;
  opacity: 0.6;
}

/* ---------- 区块 ---------- */
section {
  padding: 60px 0;
  position: relative;
}

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

.section-title {
  text-align: center;
  margin-bottom: 12px;
}

.section-title h2 {
  font-size: 28px;
  color: var(--primary);
  font-weight: 800;
  letter-spacing: 0.5px;
  position: relative;
  display: inline-block;
  padding-bottom: 12px;
}

.section-title h2::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 54px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
  box-shadow: 0 2px 10px var(--accent-glow);
}

body.dark .section-title h2 {
  color: var(--text);
}

.section-sub {
  text-align: center;
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 42px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: 24px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 卡片（毛玻璃 + hover） ---------- */
.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
  overflow: hidden;
  will-change: transform;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(46, 125, 168, 0.06), transparent 55%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

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

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

.card h3 {
  font-size: 18px;
  color: var(--primary);
  margin-bottom: 10px;
  font-weight: 700;
  line-height: 1.5;
  position: relative;
  z-index: 1;
}

body.dark .card h3 {
  color: var(--text);
}

.card h4 {
  font-size: 15px;
  color: var(--accent);
  margin: 14px 0 6px;
  font-weight: 600;
}

.card p {
  font-size: 14.5px;
  color: var(--muted);
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}

.card ul {
  margin: 8px 0 0 18px;
  font-size: 14.5px;
  color: var(--muted);
  position: relative;
  z-index: 1;
}

.card ul li {
  margin-bottom: 5px;
}

.card ul li::marker {
  color: var(--accent);
}

.card-icon {
  width: 52px;
  height: 52px;
  margin-bottom: 14px;
  border-radius: 14px;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 14px rgba(46, 125, 168, 0.14);
}

.card:hover .card-icon {
  transform: translateY(-3px) rotate(-4deg) scale(1.06);
  box-shadow: 0 10px 24px var(--accent-glow);
}

/* ---------- 数据统计 ---------- */
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 10px;
}

.stat {
  text-align: center;
  padding: 26px 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.stat::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: 0;
  background: var(--gradient-accent);
  transition: width var(--transition);
}

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

.stat:hover::after {
  width: 100%;
}

.stat .num {
  font-size: 36px;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--accent);
  line-height: 1.2;
}

.stat .label {
  font-size: 14px;
  color: var(--muted);
  margin-top: 6px;
}

/* ---------- 文章卡片 ---------- */
.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.article-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}

.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

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

.article-card h3 {
  font-size: 17px;
  color: var(--primary);
  margin-bottom: 8px;
  line-height: 1.55;
  font-weight: 700;
  transition: color var(--transition);
}

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

body.dark .article-card h3 {
  color: var(--text);
}

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

.article-meta {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
}

.article-meta span:first-child::before {
  content: "🕒";
  margin-right: 4px;
  font-size: 12px;
}

.article-card p {
  font-size: 14.5px;
  color: var(--muted);
  flex: 1;
  margin-bottom: 14px;
}

.read-more {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition), color var(--transition);
}

.read-more:hover {
  text-decoration: none;
  gap: 9px;
  color: var(--accent-light);
}

/* ---------- FAQ 手风琴 ---------- */
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  background: var(--card);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.faq-item:hover {
  border-color: var(--accent);
  box-shadow: 0 6px 18px rgba(46, 125, 168, 0.1);
}

.faq-item.open {
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(46, 125, 168, 0.14);
}

.faq-q {
  width: 100%;
  text-align: left;
  padding: 18px 22px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-family: inherit;
  line-height: 1.6;
  transition: color var(--transition), background var(--transition);
}

.faq-q:hover {
  color: var(--accent);
  background: rgba(46, 125, 168, 0.05);
}

.faq-q .arrow {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(46, 125, 168, 0.1);
  color: var(--accent);
  font-size: 17px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), background var(--transition), color var(--transition);
}

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

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 22px;
}

.faq-item.open .faq-a {
  max-height: 640px;
  padding-bottom: 18px;
}

.faq-a p {
  font-size: 14.5px;
  color: var(--muted);
  border-top: 1px dashed var(--border);
  padding-top: 14px;
}

/* ---------- 步骤流程 ---------- */
.steps {
  counter-reset: step;
  display: grid;
  gap: 18px;
}

.step {
  position: relative;
  padding: 22px 24px 22px 74px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.step:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 22px;
  top: 22px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  box-shadow: 0 4px 12px var(--accent-glow);
  transition: transform var(--transition);
}

.step:hover::before {
  transform: scale(1.1) rotate(-8deg);
}

.step h4 {
  font-size: 16px;
  color: var(--primary);
  margin-bottom: 6px;
  font-weight: 700;
}

body.dark .step h4 {
  color: var(--text);
}

.step p {
  font-size: 14.5px;
  color: var(--muted);
}

/* ---------- 联系区 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
}

.contact-info {
  list-style: none;
  margin-bottom: 18px;
}

.contact-info li {
  list-style: none;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 15px;
  display: flex;
  gap: 10px;
  align-items: baseline;
  transition: padding-left var(--transition), color var(--transition);
}

.contact-info li:hover {
  padding-left: 6px;
  color: var(--accent);
}

.contact-info li strong {
  color: var(--primary);
  min-width: 88px;
  flex-shrink: 0;
  font-weight: 600;
}

body.dark .contact-info li strong {
  color: var(--text);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  font-family: inherit;
  font-size: 14px;
  background: var(--light);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

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

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
  background: var(--card);
}

.contact-form textarea {
  min-height: 110px;
  resize: vertical;
}

.contact-form button {
  background: var(--gradient-accent);
  color: #fff;
  border: none;
  padding: 12px 30px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
  box-shadow: 0 6px 18px var(--accent-glow);
}

.contact-form button:hover {
  transform: translateY(-2px);
  filter: brightness(1.08);
  box-shadow: 0 10px 26px var(--accent-glow);
}

.contact-form button:active {
  transform: translateY(0);
}

/* ---------- 时间线 ---------- */
.timeline {
  position: relative;
  padding-left: 28px;
  border-left: 2px solid var(--border);
  margin-top: 10px;
}

.timeline-item {
  position: relative;
  margin-bottom: 26px;
  transition: transform var(--transition);
}

.timeline-item:hover {
  transform: translateX(4px);
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--card);
  box-shadow: 0 0 0 3px var(--accent-glow);
  transition: transform var(--transition), background var(--transition);
}

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

.timeline-item h4 {
  font-size: 16px;
  color: var(--primary);
  margin-bottom: 4px;
  font-weight: 700;
}

body.dark .timeline-item h4 {
  color: var(--text);
}

.timeline-item p {
  font-size: 14.5px;
  color: var(--muted);
}

/* ---------- 客户评价 ---------- */
.testimonial {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px 26px;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  box-shadow: var(--shadow);
}

.testimonial:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.testimonial::before {
  content: "\201C";
  position: absolute;
  top: 6px;
  left: 18px;
  font-size: 60px;
  line-height: 1;
  color: var(--accent);
  opacity: 0.2;
  font-family: Georgia, "Times New Roman", serif;
  transition: opacity var(--transition), transform var(--transition);
}

.testimonial:hover::before {
  opacity: 0.35;
  transform: scale(1.1);
}

.testimonial p {
  font-size: 14.5px;
  color: var(--muted);
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.testimonial .who {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

body.dark .testimonial .who {
  color: var(--text);
}

.testimonial .role {
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 页脚 ---------- */
footer {
  background: var(--gradient-hero);
  color: #c9d6e2;
  padding: 52px 0 26px;
  font-size: 14px;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74, 163, 209, 0.16), transparent 70%);
  pointer-events: none;
}

body.dark footer {
  background: #0a1420;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 32px;
  margin-bottom: 36px;
  position: relative;
  z-index: 1;
}

footer h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 14px;
  font-weight: 700;
  position: relative;
  padding-bottom: 8px;
}

footer h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 26px;
  height: 2px;
  background: var(--accent-light);
  border-radius: var(--radius-pill);
}

footer ul {
  list-style: none;
}

footer li {
  margin-bottom: 9px;
}

footer a {
  color: #c9d6e2;
  font-size: 14px;
  transition: color var(--transition), padding-left var(--transition);
  display: inline-block;
}

footer a:hover {
  color: #fff;
  padding-left: 5px;
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 20px;
  text-align: center;
  font-size: 13px;
  color: #9fb2c4;
  position: relative;
  z-index: 1;
}

.footer-bottom p {
  margin-bottom: 6px;
}

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 20px;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.24);
  z-index: 99;
  transition: transform var(--transition), box-shadow var(--transition);
}

.back-top.show {
  display: flex;
  animation: popIn 0.3s ease;
}

.back-top:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 12px 28px var(--accent-glow);
}

@keyframes popIn {
  from { opacity: 0; transform: scale(0.7); }
  to { opacity: 1; transform: scale(1); }
}

/* ---------- 滚动动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

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

/* ---------- 提示条 ---------- */
.notice {
  background: rgba(46, 125, 168, 0.08);
  border-left: 4px solid var(--accent);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  color: var(--muted);
  margin: 20px 0;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transition: background var(--transition), transform var(--transition);
}

.notice:hover {
  background: rgba(46, 125, 168, 0.12);
  transform: translateX(3px);
}

.notice strong {
  color: var(--accent);
}

/* ---------- 锚点导航 ---------- */
.anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 36px;
}

.anchor-nav a {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  color: var(--text);
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.anchor-nav a:hover {
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px var(--accent-glow);
}

/* ---------- 焦点可见性（无障碍） ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

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

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  nav ul { gap: 2px; }
  nav a { padding: 7px 9px; font-size: 14px; }
  .search-box input { width: 100px; }
}

@media (max-width: 960px) {
  nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--card-glass);
    -webkit-backdrop-filter: saturate(180%) blur(18px);
    backdrop-filter: saturate(180%) blur(18px);
    border-bottom: 1px solid var(--border);
    padding: 12px 20px;
    box-shadow: var(--shadow-hover);
    animation: fade 0.3s ease;
  }

  nav.open {
    display: block;
  }

  nav ul {
    flex-direction: column;
    gap: 0;
  }

  nav ul li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
  }

  nav ul li:last-child {
    border-bottom: none;
  }

  nav a {
    display: block;
    padding: 4px 0;
    border-radius: 0;
  }

  nav a::after {
    display: none;
  }

  nav a:hover {
    background: transparent;
    padding-left: 6px;
  }

  .menu-toggle {
    display: block;
  }

  .search-box {
    display: none;
  }

  .grid-3,
  .grid-4,
  .article-grid,
  .grid-2,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .stat-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero {
    padding: 52px 0 48px;
  }

  .hero h1 {
    font-size: 27px;
  }

  .hero p {
    font-size: 15.5px;
  }

  .section-title h2 {
    font-size: 23px;
  }

  section {
    padding: 46px 0;
  }

  .footer-grid {
    gap: 26px;
  }

  .step {
    padding: 20px 20px 20px 66px;
  }

  .step::before {
    left: 18px;
    top: 20px;
    width: 32px;
    height: 32px;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

  .container {
    padding: 0 16px;
  }

  .hero {
    padding: 42px 0 38px;
  }

  .hero h1 {
    font-size: 23px;
    letter-spacing: 0.2px;
  }

  .hero p {
    font-size: 14.5px;
  }

  .badge {
    font-size: 13px;
    padding: 6px 13px;
  }

  .btn {
    padding: 11px 22px;
    font-size: 14px;
  }

  .slide {
    padding: 22px 20px 38px;
  }

  .slide h3 {
    font-size: 17px;
  }

  .slide p {
    font-size: 14px;
  }

  section {
    padding: 38px 0;
  }

  .section-title h2 {
    font-size: 21px;
  }

  .section-sub {
    font-size: 14px;
    margin-bottom: 30px;
  }

  .card {
    padding: 20px;
  }

  .card h3 {
    font-size: 16.5px;
  }

  .article-card {
    padding: 20px;
  }

  .faq-q {
    padding: 15px 16px;
    font-size: 15px;
  }

  .faq-a {
    padding: 0 16px;
  }

  .contact-info li {
    flex-direction: column;
    gap: 2px;
  }

  .contact-info li strong {
    min-width: 0;
  }

  .stat-row {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .stat {
    padding: 20px 12px;
  }

  .stat .num {
    font-size: 30px;
  }

  .back-top {
    right: 16px;
    bottom: 16px;
    width: 42px;
    height: 42px;
    font-size: 18px;
  }

  .anchor-nav a {
    padding: 7px 14px;
    font-size: 13px;
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  header,
  footer,
  .back-top,
  .carousel,
  .hero-cta,
  .search-box,
  .icon-btn,
  .menu-toggle {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .card,
  .article-card,
  .faq-item {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}
```