:root {
  --primary: #4f46e5;
  --primary-light: #6366f1;
  --primary-dark: #4338ca;
  --secondary: #8b5cf6;
  --secondary-light: #a78bfa;
  --bg: #0b0e14;
  --bg-elevated: #11151f;
  --bg-card: #151a26;
  --bg-card-hover: #1a2030;
  --text: #e8ecf5;
  --text-soft: #c3cad9;
  --muted: #8b94a9;
  --border: rgba(139, 148, 169, 0.14);
  --border-strong: rgba(139, 148, 169, 0.26);
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 60px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 40px rgba(79, 70, 229, 0.35);
  --gradient-primary: linear-gradient(135deg, #4f46e5 0%, #8b5cf6 100%);
  --gradient-primary-soft: linear-gradient(135deg, rgba(79, 70, 229, 0.18) 0%, rgba(139, 92, 246, 0.18) 100%);
  --gradient-text: linear-gradient(120deg, #a5b4fc 0%, #c4b5fd 40%, #8b5cf6 100%);
  --container: 1800px;
  --nav-height: 72px;
  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 12% -8%, rgba(79, 70, 229, 0.22), transparent 60%),
    radial-gradient(1000px 520px at 88% 0%, rgba(139, 92, 246, 0.16), transparent 62%),
    radial-gradient(900px 700px at 50% 110%, rgba(79, 70, 229, 0.12), transparent 65%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--primary-light);
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.6em;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

h1 {
  font-size: clamp(2rem, 3.4vw, 3.4rem);
}

h2 {
  font-size: clamp(1.6rem, 2.4vw, 2.4rem);
}

h3 {
  font-size: clamp(1.15rem, 1.6vw, 1.4rem);
}

p {
  margin: 0 0 1em;
  color: var(--text-soft);
}

::selection {
  background: rgba(139, 92, 246, 0.4);
  color: #fff;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 48px;
}

.section {
  padding: 96px 0;
  position: relative;
}

.section-head {
  max-width: 860px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--secondary-light);
  background: var(--gradient-primary-soft);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 18px;
}

.section-head h2 {
  margin-bottom: 16px;
}

.section-head p {
  font-size: 17px;
  color: var(--muted);
  margin: 0;
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  line-height: 1.2;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 10px 30px rgba(79, 70, 229, 0.35);
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 16px 42px rgba(79, 70, 229, 0.5);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--border-strong);
  color: var(--text);
}

.btn-ghost:hover {
  color: #fff;
  border-color: var(--primary-light);
  background: rgba(79, 70, 229, 0.14);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 9px 18px;
  font-size: 13.5px;
  border-radius: var(--radius-sm);
}

.btn-block {
  width: 100%;
}

/* ============ 顶部导航 ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(11, 14, 20, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  background: rgba(11, 14, 20, 0.92);
  border-bottom-color: var(--border);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
}

.nav-inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 19px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.brand:hover {
  color: var(--text);
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--gradient-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  box-shadow: var(--shadow-glow);
  flex-shrink: 0;
}

.brand-name span {
  color: var(--secondary-light);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  display: inline-block;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-soft);
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.nav-links a.active {
  color: #fff;
  background: rgba(79, 70, 229, 0.22);
  box-shadow: inset 0 0 0 1px rgba(139, 92, 246, 0.35);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  position: relative;
  padding: 0;
  flex-shrink: 0;
}

.nav-toggle span {
  position: absolute;
  left: 50%;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transform: translateX(-50%);
  transition: transform var(--transition), opacity var(--transition), top var(--transition);
}

.nav-toggle span:nth-child(1) {
  top: 15px;
}

.nav-toggle span:nth-child(2) {
  top: 21px;
}

.nav-toggle span:nth-child(3) {
  top: 27px;
}

.nav-toggle.is-open span:nth-child(1) {
  top: 21px;
  transform: translateX(-50%) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  top: 21px;
  transform: translateX(-50%) rotate(-45deg);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  z-index: 999;
  background: rgba(11, 14, 20, 0.97);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  padding: 18px 24px 28px;
  flex-direction: column;
  gap: 6px;
  box-shadow: var(--shadow-lg);
  max-height: calc(100vh - var(--nav-height));
  overflow-y: auto;
}

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

.mobile-nav a {
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  font-size: 16px;
  font-weight: 500;
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: #fff;
  background: rgba(79, 70, 229, 0.2);
}

.mobile-nav .btn {
  margin-top: 10px;
}

/* ============ Hero ============ */
.hero {
  padding: calc(var(--nav-height) + 96px) 0 96px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -180px;
  left: 50%;
  transform: translateX(-50%);
  width: 1100px;
  height: 620px;
  background: radial-gradient(closest-side, rgba(79, 70, 229, 0.34), transparent 72%);
  filter: blur(30px);
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 1120px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--secondary-light);
  background: var(--gradient-primary-soft);
  border: 1px solid var(--border-strong);
  margin-bottom: 28px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.18);
  animation: pulse 2.4s ease-in-out infinite;
}

.hero h1 {
  font-size: clamp(2.3rem, 4.4vw, 4.2rem);
  line-height: 1.14;
  margin-bottom: 26px;
  letter-spacing: -0.02em;
}

.hero-sub {
  max-width: 820px;
  margin: 0 auto 40px;
  font-size: clamp(1rem, 1.25vw, 1.2rem);
  color: var(--muted);
  line-height: 1.85;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 72px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.hero-stat {
  background: rgba(17, 21, 31, 0.86);
  padding: 30px 24px;
  text-align: center;
}

.hero-stat .num {
  font-size: clamp(1.7rem, 2.6vw, 2.5rem);
  font-weight: 800;
  line-height: 1.1;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

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

/* ============ 卡片网格 ============ */
.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);
}

.card {
  position: relative;
  background: linear-gradient(160deg, rgba(26, 32, 48, 0.9) 0%, rgba(17, 21, 31, 0.92) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
  overflow: hidden;
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(420px 220px at 50% -20%, rgba(139, 92, 246, 0.16), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(139, 92, 246, 0.45);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(139, 92, 246, 0.1);
}

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

.tool-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.tool-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  background: var(--gradient-primary-soft);
  border: 1px solid var(--border-strong);
  margin-bottom: 22px;
  flex-shrink: 0;
}

.tool-card h3 {
  margin-bottom: 10px;
  font-size: 1.2rem;
}

.tool-card p {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
  margin-bottom: 20px;
  flex-grow: 1;
}

.tool-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.tool-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--secondary-light);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.tool-link:hover {
  color: var(--primary-light);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.6;
  border: 1px solid transparent;
  white-space: nowrap;
}

.tag-primary {
  color: #c7d2fe;
  background: rgba(79, 70, 229, 0.2);
  border-color: rgba(99, 102, 241, 0.4);
}

.tag-success {
  color: #6ee7b7;
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.35);
}

.tag-warning {
  color: #fcd34d;
  background: rgba(245, 158, 11, 0.14);
  border-color: rgba(245, 158, 11, 0.35);
}

.tag-muted {
  color: var(--muted);
  background: rgba(139, 148, 169, 0.12);
  border-color: var(--border-strong);
}

.tag .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* ============ 优势三栏 ============ */
.feature {
  padding: 34px;
  border-radius: var(--radius-lg);
  background: rgba(17, 21, 31, 0.6);
  border: 1px solid var(--border);
  transition: border-color var(--transition), transform var(--transition), background var(--transition);
}

.feature:hover {
  border-color: rgba(139, 92, 246, 0.4);
  transform: translateY(-4px);
  background: rgba(21, 26, 38, 0.85);
}

.feature-num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--secondary-light);
  margin-bottom: 16px;
}

.feature h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.feature p {
  color: var(--muted);
  font-size: 15px;
  margin: 0;
  line-height: 1.8;
}

/* ============ 案例轮播 ============ */
.carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  background: rgba(17, 21, 31, 0.6);
}

.carousel-track {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.carousel-slide {
  flex: 0 0 100%;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 0;
  align-items: stretch;
  min-height: 420px;
}

.carousel-media {
  position: relative;
  overflow: hidden;
  background: var(--bg-elevated);
}

.carousel-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.82;
}

.carousel-body {
  padding: 56px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.carousel-body .quote {
  font-size: clamp(1.05rem, 1.5vw, 1.35rem);
  line-height: 1.75;
  color: var(--text);
  margin-bottom: 26px;
  font-weight: 500;
}

.carousel-body .who {
  font-weight: 700;
  color: var(--text);
}

.carousel-body .role {
  font-size: 14px;
  color: var(--muted);
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 32px;
}

.carousel-dots {
  display: flex;
  align-items: center;
  gap: 10px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border-radius: 50%;
  border: none;
  background: rgba(139, 148, 169, 0.35);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.carousel-dot.is-active {
  background: var(--secondary);
  transform: scale(1.25);
  box-shadow: 0 0 12px rgba(139, 92, 246, 0.7);
}

.carousel-arrow {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.carousel-arrow:hover {
  background: rgba(79, 70, 229, 0.2);
  border-color: var(--primary-light);
  transform: translateY(-2px);
}

/* ============ CTA 横幅 ============ */
.cta-banner {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  padding: 72px 56px;
  text-align: center;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.28) 0%, rgba(139, 92, 246, 0.22) 100%);
  border: 1px solid rgba(139, 92, 246, 0.4);
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: -140px;
  left: 50%;
  transform: translateX(-50%);
  width: 780px;
  height: 420px;
  background: radial-gradient(closest-side, rgba(139, 92, 246, 0.45), transparent 72%);
  filter: blur(24px);
  pointer-events: none;
}

.cta-banner > * {
  position: relative;
  z-index: 1;
}

.cta-banner h2 {
  font-size: clamp(1.7rem, 2.8vw, 2.6rem);
  margin-bottom: 16px;
}

.cta-banner p {
  max-width: 720px;
  margin: 0 auto 34px;
  color: var(--text-soft);
  font-size: 16.5px;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

/* ============ 页脚 ============ */
.site-footer {
  margin-top: 96px;
  border-top: 1px solid var(--border);
  background: rgba(9, 12, 18, 0.85);
  padding: 72px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}

.footer-brand .brand {
  margin-bottom: 18px;
}

.footer-brand p {
  color: var(--muted);
  font-size: 14.5px;
  max-width: 380px;
  line-height: 1.8;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  color: var(--muted);
  font-size: 14.5px;
  transition: color var(--transition), padding-left var(--transition);
}

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

.footer-bottom {
  padding-top: 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13.5px;
  color: var(--muted);
}

.footer-bottom a {
  color: var(--muted);
}

.footer-bottom a:hover {
  color: var(--secondary-light);
}

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

/* ============ 页面标题区 ============ */
.page-hero {
  padding: calc(var(--nav-height) + 72px) 0 56px;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  top: -160px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 480px;
  background: radial-gradient(closest-side, rgba(79, 70, 229, 0.28), transparent 72%);
  filter: blur(28px);
  pointer-events: none;
}

.page-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 980px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 22px;
}

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

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

.breadcrumb .sep {
  opacity: 0.5;
}

.page-hero h1 {
  font-size: clamp(2rem, 3.2vw, 3rem);
  margin-bottom: 20px;
}

.page-hero .lead {
  font-size: 17px;
  color: var(--muted);
  max-width: 760px;
  margin: 0;
  line-height: 1.85;
}

/* ============ 筛选标签 ============ */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 44px;
}

.filter-btn {
  padding: 10px 22px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-soft);
  font-size: 14.5px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover {
  color: #fff;
  border-color: var(--primary-light);
  background: rgba(79, 70, 229, 0.14);
}

.filter-btn.is-active {
  color: #fff;
  background: var(--gradient-primary);
  border-color: transparent;
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.38);
}

.tool-item.is-hidden {
  display: none;
}

/* ============ 工具详情 / 功能要点 ============ */
.detail-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  padding: 44px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: rgba(17, 21, 31, 0.6);
  margin-bottom: 28px;
}

.detail-block h3 {
  margin-bottom: 16px;
}

.check-list li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 14px;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.7;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-primary);
  margin-top: 3px;
}

/* ============ FAQ 手风琴 ============ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 1080px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(17, 21, 31, 0.7);
  overflow: hidden;
  transition: border-color var(--transition), background var(--transition);
}

.faq-item.is-open {
  border-color: rgba(139, 92, 246, 0.5);
  background: rgba(21, 26, 38, 0.9);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 26px;
  background: none;
  border: none;
  color: var(--text);
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: color var(--transition);
}

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

.faq-icon {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 400;
  color: var(--secondary-light);
  transition: transform var(--transition), background var(--transition);
}

.faq-item.is-open .faq-icon {
  transform: rotate(45deg);
  background: rgba(79, 70, 229, 0.25);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-answer-inner {
  padding: 0 26px 24px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
}

.faq-answer-inner p:last-child {
  margin-bottom: 0;
}

/* ============ 时间轴 ============ */
.timeline {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
  padding-left: 0;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, transparent, var(--border-strong) 8%, var(--border-strong) 92%, transparent);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 48px 56px 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  margin-left: 50%;
  padding: 0 0 56px 48px;
  text-align: left;
}

.timeline-item::after {
  content: "";
  position: absolute;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--border-strong);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.timeline-item:nth-child(odd)::after {
  right: -8px;
}

.timeline-item:nth-child(even)::after {
  left: -8px;
}

.timeline-item.is-active::after {
  background: var(--gradient-primary);
  border-color: var(--secondary-light);
  box-shadow: 0 0 0 6px rgba(79, 70, 229, 0.2), 0 0 24px rgba(139, 92, 246, 0.6);
  transform: scale(1.15);
}

.timeline-year {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--secondary-light);
  background: var(--gradient-primary-soft);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 14px;
}

.timeline-card {
  display: inline-block;
  padding: 26px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: rgba(17, 21, 31, 0.72);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  text-align: inherit;
}

.timeline-card:hover {
  border-color: rgba(139, 92, 246, 0.45);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.timeline-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.timeline-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ============ 信息卡片 / 联系页 ============ */
.info-card {
  padding: 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: linear-gradient(160deg, rgba(26, 32, 48, 0.85) 0%, rgba(17, 21, 31, 0.9) 100%);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  height: 100%;
}

.info-card:hover {
  border-color: rgba(139, 92, 246, 0.45);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.info-card .info-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 21px;
  background: var(--gradient-primary-soft);
  border: 1px solid var(--border-strong);
  margin-bottom: 18px;
}

.info-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.info-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.8;
  word-break: break-word;
}

.info-card a {
  color: var(--secondary-light);
  font-weight: 600;
}

.info-card a:hover {
  color: var(--primary-light);
}

/* ============ 表单 ============ */
.form-panel {
  padding: 44px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  background: linear-gradient(160deg, rgba(26, 32, 48, 0.82) 0%, rgba(17, 21, 31, 0.92) 100%);
  box-shadow: var(--shadow-md);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field.full {
  grid-column: 1 / -1;
}

.form-field label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-soft);
}

.form-field label .req {
  color: #f87171;
  margin-left: 4px;
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: rgba(11, 14, 20, 0.7);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  line-height: 1.5;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  outline: none;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: rgba(139, 148, 169, 0.7);
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  border-color: var(--primary-light);
  background: rgba(11, 14, 20, 0.9);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.22);
}

.form-field textarea {
  min-height: 140px;
  resize: vertical;
}

.form-field.has-error input,
.form-field.has-error textarea,
.form-field.has-error select {
  border-color: #f87171;
  box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.16);
}

.form-error {
  font-size: 13px;
  color: #f87171;
  min-height: 18px;
  line-height: 1.4;
}

.form-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}

.form-note {
  font-size: 13.5px;
  color: var(--muted);
  margin: 0;
}

.form-success {
  display: none;
  margin-top: 24px;
  padding: 18px 22px;
  border-radius: var(--radius);
  border: 1px solid rgba(16, 185, 129, 0.45);
  background: rgba(16, 185, 129, 0.12);
  color: #6ee7b7;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.7;
}

.form-success.is-visible {
  display: block;
  animation: fadeUp 0.5s ease both;
}

/* ============ 地图占位 ============ */
.map-placeholder {
  position: relative;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  overflow: hidden;
  min-height: 380px;
  background:
    radial-gradient(600px 300px at 30% 30%, rgba(79, 70, 229, 0.28), transparent 70%),
    radial-gradient(500px 280px at 75% 70%, rgba(139, 92, 246, 0.24), transparent 70%),
    linear-gradient(160deg, #11151f 0%, #0b0e14 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px;
}

.map-placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(139, 148, 169, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 148, 169, 0.09) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.map-placeholder-inner {
  position: relative;
  z-index: 1;
  max-width: 460px;
}

.map-pin {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  background: var(--gradient-primary);
  box-shadow: 0 0 0 10px rgba(79, 70, 229, 0.16), var(--shadow-glow);
  animation: floatY 4s ease-in-out infinite;
}

.map-placeholder h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.map-placeholder p {
  color: var(--muted);
  font-size: 14.5px;
  margin: 0;
  line-height: 1.8;
}

/* ============ 内容区块通用 ============ */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.split-media {
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  position: relative;
}

.split-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
}

.split-body h2 {
  margin-bottom: 20px;
}

.split-body p {
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.9;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
}

.stat-box {
  padding: 22px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(17, 21, 31, 0.6);
  text-align: center;
}

.stat-box .num {
  font-size: 1.7rem;
  font-weight: 800;
  line-height: 1.1;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  margin-bottom: 6px;
  font-variant-numeric: tabular-nums;
}

.stat-box .label {
  font-size: 13px;
  color: var(--muted);
}

.note-box {
  padding: 24px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background: rgba(79, 70, 229, 0.1);
  color: var(--text-soft);
  font-size: 14.5px;
  line-height: 1.85;
}

.note-box strong {
  color: var(--text);
}

/* ============ 滚动渐显动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  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.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 {
  transition-delay: 0.08s;
}

.reveal-delay-2 {
  transition-delay: 0.16s;
}

.reveal-delay-3 {
  transition-delay: 0.24s;
}

.reveal-delay-4 {
  transition-delay: 0.32s;
}

.reveal-delay-5 {
  transition-delay: 0.4s;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.18);
    opacity: 1;
  }
  50% {
    box-shadow: 0 0 0 8px rgba(52, 211, 153, 0.06);
    opacity: 0.75;
  }
}

@keyframes floatY {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes glowShift {
  0%,
  100% {
    opacity: 0.55;
    transform: translateX(-50%) scale(1);
  }
  50% {
    opacity: 0.85;
    transform: translateX(-50%) scale(1.06);
  }
}

/* ============ 响应式断点 ============ */
@media (max-width: 1440px) {
  .container,
  .nav-inner {
    padding: 0 36px;
  }

  .carousel-body {
    padding: 44px;
  }
}

@media (max-width: 1200px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 40px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }

  .nav-actions .btn {
    display: none;
  }

  .nav-toggle {
    display: inline-block;
  }

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

  .split,
  .detail-block {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .carousel-slide {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .carousel-media {
    min-height: 260px;
  }

  .carousel-body {
    padding: 36px;
  }

  .timeline::before {
    left: 12px;
  }

  .timeline-item,
  .timeline-item:nth-child(even) {
    width: 100%;
    margin-left: 0;
    padding: 0 0 44px 44px;
    text-align: left;
  }

  .timeline-item:nth-child(odd)::after,
  .timeline-item:nth-child(even)::after {
    left: 4px;
    right: auto;
  }

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

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .container,
  .nav-inner {
    padding: 0 20px;
  }

  .section {
    padding: 64px 0;
  }

  .hero {
    padding: calc(var(--nav-height) + 56px) 0 64px;
  }

  .page-hero {
    padding: calc(var(--nav-height) + 48px) 0 40px;
  }

  .hero-cta {
    margin-bottom: 48px;
  }

  .hero-cta .btn {
    width: 100%;
  }

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

  .card,
  .feature {
    padding: 26px;
  }

  .cta-banner {
    padding: 48px 24px;
  }

  .cta-actions .btn {
    width: 100%;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .form-panel {
    padding: 28px 22px;
  }

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

  .detail-block {
    padding: 28px 22px;
  }

  .carousel-body {
    padding: 28px 22px;
  }

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

  .section-head {
    margin-bottom: 40px;
  }

  .filter-bar {
    gap: 8px;
  }

  .filter-btn {
    padding: 8px 16px;
    font-size: 13.5px;
  }

  .faq-question {
    padding: 18px 20px;
    font-size: 15px;
  }

  .faq-answer-inner {
    padding: 0 20px 20px;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    grid-template-columns: 1fr;
  }

  .hero-stat {
    padding: 22px 18px;
  }

  .brand {
    font-size: 17px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 16px;
  }

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

  .carousel-arrow {
    width: 40px;
    height: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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