/* ============================================
   铭赞网络 全域网络营销官网 主样式
   Design System: Tech Blue + Copper Accent
   ============================================ */

/* CSS 变量 - 设计令牌 */
:root {
  /* 主色 - 科技深蓝 */
  --color-primary: #0A2540;
  --color-primary-dark: #061529;
  --color-primary-light: #143C66;
  --color-primary-50: rgba(10, 37, 64, 0.5);

  /* 辅色 - 科技铜 / 流光金 */
  --color-copper: #C8A26E;
  --color-copper-light: #E5B66E;
  --color-copper-glow: rgba(232, 178, 122, 0.35);

  /* 强调色 - 活力橙 */
  --color-accent: #FF6B35;
  --color-accent-hover: #FF8556;

  /* 中性色 */
  --color-bg: #ffffff;
  --color-bg-alt: #f7f9fc;
  --color-bg-dark: #061529;
  --color-text: #1a2434;
  --color-text-2: #4a5568;
  --color-text-3: #718096;
  --color-text-light: rgba(255, 255, 255, 0.92);
  --color-text-light-2: rgba(255, 255, 255, 0.7);
  --color-border: #e2e8f0;
  --color-border-dark: rgba(255, 255, 255, 0.12);

  /* 间距 - 4的倍数 */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-32: 128px;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --radius-2xl: 28px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(10, 37, 64, 0.06);
  --shadow-md: 0 4px 12px rgba(10, 37, 64, 0.08);
  --shadow-lg: 0 12px 32px rgba(10, 37, 64, 0.12);
  --shadow-xl: 0 24px 60px rgba(10, 37, 64, 0.16);
  --shadow-copper: 0 8px 24px rgba(200, 162, 110, 0.25);
  --shadow-glow: 0 0 32px rgba(200, 162, 110, 0.3);

  /* 字体 - 优先使用系统字体保证零依赖加载，外部字体仅作增强 */
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans CN", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-display: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", "Orbitron", Arial, sans-serif;

  /* 容器 */
  --container-max: 1280px;
  --container-pad: 24px;

  /* 动画 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 200ms;
  --duration-base: 400ms;
  --duration-slow: 800ms;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

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

ul, ol {
  list-style: none;
}

::selection {
  background: var(--color-copper);
  color: var(--color-primary);
}

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

.text-copper {
  color: var(--color-copper);
  background: linear-gradient(135deg, var(--color-copper-light), var(--color-copper));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ============================================
   导航 + Banner 一体化
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, #0d3259 100%);
  color: var(--color-text-light);
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

#heroCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.6;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200, 162, 110, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 162, 110, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 75%);
}

.hero-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 30%, rgba(200, 162, 110, 0.18), transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 70%, rgba(20, 60, 102, 0.4), transparent 60%);
  animation: glowShift 12s ease-in-out infinite alternate;
}

@keyframes glowShift {
  0% { transform: scale(1) translate(0, 0); }
  100% { transform: scale(1.1) translate(2%, -2%); }
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 18px 0;
  background: rgba(6, 21, 41, 0.4);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(200, 162, 110, 0.1);
  transition: all var(--duration-base) var(--ease-out);
}

.navbar.scrolled {
  padding: 12px 0;
  background: rgba(6, 21, 41, 0.92);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--color-text-light);
  white-space: nowrap;
  transition: transform var(--duration-fast) var(--ease-out);
}

.logo:hover {
  transform: translateY(-1px);
}

.logo-brand {
  position: relative;
  background: linear-gradient(135deg, #fff 0%, var(--color-copper-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
}

.logo-r {
  font-size: 10px;
  font-weight: 600;
  margin-left: 2px;
  vertical-align: super;
  -webkit-text-fill-color: var(--color-copper);
  color: var(--color-copper);
}

.logo-divider {
  color: var(--color-copper);
  opacity: 0.6;
  font-weight: 300;
}

.logo-tag {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-copper-light);
  letter-spacing: 1.5px;
}

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

.nav-menu a {
  position: relative;
  display: inline-block;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-light-2);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}

.nav-menu a:hover {
  color: var(--color-copper-light);
  background: rgba(200, 162, 110, 0.08);
}

.nav-menu a.nav-cta {
  margin-left: 8px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--color-copper) 0%, var(--color-copper-light) 100%);
  color: var(--color-primary-dark);
  font-weight: 600;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-copper);
}

.nav-menu a.nav-cta:hover {
  background: linear-gradient(135deg, var(--color-copper-light) 0%, #f0c98a 100%);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(200, 162, 110, 0.4);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 4px;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-light);
  border-radius: 2px;
  transition: all var(--duration-base) var(--ease-out);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero Content */
.hero-content {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 100vh;
  padding: 120px 0 80px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  margin-bottom: 28px;
  background: rgba(200, 162, 110, 0.1);
  border: 1px solid rgba(200, 162, 110, 0.25);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-copper-light);
  letter-spacing: 0.5px;
  animation: fadeInUp 0.8s var(--ease-out) both;
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-copper);
  box-shadow: 0 0 8px var(--color-copper);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.5px;
  margin-bottom: 24px;
  animation: fadeInUp 0.8s var(--ease-out) 0.1s both;
}

.hero-subtitle {
  max-width: 720px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--color-text-light-2);
  margin-bottom: 40px;
  animation: fadeInUp 0.8s var(--ease-out) 0.2s both;
}

.hero-subtitle strong {
  color: var(--color-copper-light);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 60px;
  animation: fadeInUp 0.8s var(--ease-out) 0.3s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-copper) 0%, var(--color-copper-light) 100%);
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-copper);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.3) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.6s var(--ease-out);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(200, 162, 110, 0.45);
}

.btn-primary:hover::before {
  transform: translateX(100%);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text-light);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--color-copper);
  color: var(--color-copper-light);
  transform: translateY(-3px);
}

.hero-trust {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 760px;
  padding-top: 32px;
  border-top: 1px solid rgba(200, 162, 110, 0.18);
  animation: fadeInUp 0.8s var(--ease-out) 0.4s both;
}

.trust-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.trust-num {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 700;
  color: var(--color-copper-light);
  line-height: 1;
  letter-spacing: -0.5px;
}

.trust-num small {
  font-size: 0.55em;
  font-weight: 500;
  margin-left: 2px;
  opacity: 0.7;
}

.trust-label {
  font-size: 13px;
  color: var(--color-text-light-2);
}

.scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-light-2);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: bounce 2.5s ease-in-out infinite;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-copper), transparent);
}

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

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

/* ============================================
   通用 Section
   ============================================ */
.section {
  position: relative;
  padding: clamp(60px, 8vw, 100px) 0;
  background: var(--color-bg);
}

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

.section-head {
  text-align: center;
  max-width: 820px;
  margin: 0 auto var(--space-16);
}

.section-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--color-copper);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.section-eyebrow-light {
  color: var(--color-copper-light);
}

.section-title {
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.5px;
  color: var(--color-text);
  margin-bottom: 20px;
}

.section-title-light {
  color: var(--color-text-light);
}

.section-desc {
  font-size: 15px;
  line-height: 1.85;
  color: var(--color-text-2);
}

.section-desc-light {
  color: var(--color-text-light-2);
}

/* ============================================
   核心业务卡片
   ============================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

.service-card {
  grid-column: span 4;
  position: relative;
  padding: 32px 28px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--duration-base) var(--ease-out);
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-copper), var(--color-copper-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-base) var(--ease-out);
}

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

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

.service-card-lg {
  grid-column: span 12;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px 32px;
  padding: 40px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-text-light);
  border: none;
}

.service-card-lg::before {
  background: linear-gradient(90deg, var(--color-copper), var(--color-copper-light), var(--color-copper));
  height: 4px;
}

.service-card-lg .service-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--color-copper), var(--color-copper-light));
  color: var(--color-primary-dark);
  grid-row: span 2;
}

.service-card-lg h3 {
  font-size: 24px;
  color: #ffffff !important;
  font-weight: 800;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.service-card-lg p {
  color: rgba(255, 255, 255, 0.85) !important;
  line-height: 1.85;
}

.service-card-lg .service-tags li {
  background: rgba(200, 162, 110, 0.15);
  color: var(--color-copper-light);
  border: 1px solid rgba(200, 162, 110, 0.25);
}

.service-card-lg .card-link {
  color: var(--color-copper-light) !important;
  font-weight: 600;
}

.service-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-copper) 0%, var(--color-copper-light) 100%);
  color: var(--color-primary-dark);
  border-radius: var(--radius-md);
  margin-bottom: 18px;
  box-shadow: 0 6px 16px rgba(200, 162, 110, 0.25);
  transition: transform var(--duration-base) var(--ease-out);
}

.service-card:hover .service-icon {
  transform: rotate(-5deg) scale(1.05);
}

.service-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
  letter-spacing: -0.2px;
}

.service-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-2);
  margin-bottom: 16px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.service-tags li {
  font-size: 12px;
  padding: 4px 12px;
  background: var(--color-bg-alt);
  color: var(--color-text-2);
  border-radius: var(--radius-full);
}

.card-link,
.card-link-sm {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-copper);
  margin-top: 8px;
  transition: gap var(--duration-fast) var(--ease-out);
}

.card-link:hover,
.card-link-sm:hover {
  gap: 8px;
  color: var(--color-copper-light);
}

.card-link-sm {
  font-size: 12px;
  margin-right: 12px;
}

.card-link-sm:last-child {
  margin-right: 0;
}

/* ============================================
   矩阵方案
   ============================================ */
.matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.matrix-card {
  position: relative;
  padding: 36px 28px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: all var(--duration-base) var(--ease-out);
}

.matrix-card-featured {
  background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-text-light);
  border: none;
  transform: translateY(-12px);
  box-shadow: var(--shadow-xl);
}

.matrix-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.matrix-card-featured:hover {
  transform: translateY(-16px);
}

.matrix-tier {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 4px 12px;
  background: var(--color-bg-alt);
  color: var(--color-copper);
  border-radius: var(--radius-full);
  margin-bottom: 18px;
}

.matrix-card-featured .matrix-tier {
  background: rgba(200, 162, 110, 0.2);
  color: var(--color-copper-light);
}

.matrix-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.matrix-card-featured h3 {
  color: var(--color-text-light);
}

.matrix-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-2);
  margin-bottom: 20px;
}

.matrix-card-featured p {
  color: var(--color-text-light-2);
}

.matrix-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.matrix-features span {
  font-size: 12px;
  padding: 4px 10px;
  background: var(--color-bg-alt);
  color: var(--color-text-2);
  border-radius: var(--radius-sm);
}

.matrix-card-featured .matrix-features span {
  background: rgba(200, 162, 110, 0.15);
  color: var(--color-copper-light);
}

.matrix-platforms {
  padding: 32px;
  background: linear-gradient(135deg, var(--color-bg-alt), #fff);
  border-radius: var(--radius-lg);
  border: 1px dashed rgba(200, 162, 110, 0.4);
}

.platform-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-copper);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.platform-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.platform-list li {
  font-size: 13px;
  padding: 8px 16px;
  background: #fff;
  color: var(--color-text);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  transition: all var(--duration-fast) var(--ease-out);
}

.platform-list li:hover {
  background: var(--color-copper);
  color: #fff;
  border-color: var(--color-copper);
  transform: translateY(-2px);
}

/* ============================================
   多账号运营
   ============================================ */
.accounts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.account-feature {
  padding: 32px 24px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  position: relative;
  transition: all var(--duration-base) var(--ease-out);
}

.account-feature:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-copper);
}

.feature-num {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 800;
  color: var(--color-copper);
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.4;
  transition: opacity var(--duration-base) var(--ease-out);
}

.account-feature:hover .feature-num {
  opacity: 1;
}

.account-feature h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text);
}

.account-feature p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-2);
}

/* ============================================
   15年+ 实力版块
   ============================================ */
.strength-section {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, #0d3259 100%);
  color: var(--color-text-light);
  position: relative;
  overflow: hidden;
}

.strength-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 40% at 50% 0%, rgba(200, 162, 110, 0.18), transparent 60%),
    radial-gradient(ellipse 60% 50% at 100% 100%, rgba(20, 60, 102, 0.5), transparent 60%);
  pointer-events: none;
}

.strength-section .container {
  position: relative;
  z-index: 1;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
  margin-bottom: 80px;
}

.stat-item {
  text-align: center;
  padding: 28px 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(200, 162, 110, 0.15);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(8px);
  transition: all var(--duration-base) var(--ease-out);
}

.stat-item:hover {
  background: rgba(200, 162, 110, 0.08);
  border-color: rgba(200, 162, 110, 0.4);
  transform: translateY(-4px);
}

.stat-num {
  font-family: var(--font-display);
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-copper-light), var(--color-copper));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  letter-spacing: -1px;
}

.stat-suffix {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-copper-light);
  margin-left: 2px;
  vertical-align: top;
}

.stat-label {
  font-size: 13px;
  color: var(--color-text-light-2);
  margin-top: 8px;
  letter-spacing: 0.5px;
}

.strength-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.strength-feature {
  padding: 28px 24px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  transition: all var(--duration-base) var(--ease-out);
}

.strength-feature:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-4px);
}

.sf-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-copper), var(--color-copper-light));
  color: var(--color-primary-dark);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}

.strength-feature h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.strength-feature p {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--color-text-light-2);
}

/* ============================================
   服务流程
   ============================================ */
.process-list {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  position: relative;
}

.process-step {
  position: relative;
  padding: 28px 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--duration-base) var(--ease-out);
}

.process-step::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -16px;
  width: 16px;
  height: 1px;
  background: linear-gradient(90deg, var(--color-copper), transparent);
  transform: translateY(-50%);
}

.process-step:last-child::after {
  display: none;
}

.process-step:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-copper);
}

.step-num {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  color: var(--color-copper);
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.process-step h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.process-step p {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--color-text-2);
}

/* ============================================
   合作案例
   ============================================ */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  position: relative;
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--duration-base) var(--ease-out);
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.case-img {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 20px;
  color: #fff;
}

.case-img-1 { background: linear-gradient(135deg, #143C66 0%, #0A2540 50%, #C8A26E 100%); }
.case-img-2 { background: linear-gradient(135deg, #FF6B35 0%, #C8A26E 100%); }
.case-img-3 { background: linear-gradient(135deg, #2d3561 0%, #0A2540 100%); }
.case-img-4 { background: linear-gradient(135deg, #0A2540 0%, #143C66 100%); }
.case-img-5 { background: linear-gradient(135deg, #C8A26E 0%, #FF8556 100%); }
.case-img-6 { background: linear-gradient(135deg, #143C66 0%, #061529 50%, #2d3561 100%); }

.case-img::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(200, 162, 110, 0.2) 0%, transparent 50%);
}

.case-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  z-index: 2;
}

.case-overlay {
  position: relative;
  z-index: 1;
  width: 100%;
}

.case-overlay h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.case-overlay p {
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.85);
}

.case-body {
  padding: 20px;
}

.case-body h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.case-body p {
  font-size: 13px;
  color: var(--color-text-2);
  margin-bottom: 12px;
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.case-meta span {
  font-size: 11px;
  padding: 3px 10px;
  background: var(--color-bg-alt);
  color: var(--color-text-2);
  border-radius: var(--radius-sm);
}

/* ============================================
   FAQ 常见问题
   ============================================ */
.faq-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  max-width: 1200px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--duration-base) var(--ease-out);
}

.faq-item:hover {
  border-color: var(--color-copper);
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  transition: all var(--duration-fast) var(--ease-out);
}

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

.faq-item summary:hover {
  color: var(--color-copper);
}

.faq-q {
  flex: 1;
}

.faq-icon {
  position: relative;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background: var(--color-copper);
  transition: all var(--duration-base) var(--ease-out);
}

.faq-icon::before {
  top: 10px;
  left: 2px;
  width: 18px;
  height: 2px;
}

.faq-icon::after {
  top: 2px;
  left: 10px;
  width: 2px;
  height: 18px;
}

.faq-item[open] .faq-icon::after {
  transform: scaleY(0);
}

.faq-a {
  padding: 0 24px 20px;
  border-top: 1px solid var(--color-border);
  margin-top: -1px;
  animation: faqOpen 0.4s var(--ease-out);
}

.faq-a p {
  padding-top: 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--color-text-2);
}

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

/* ============================================
   关于铭赞
   ============================================ */
.about-section {
  background: linear-gradient(180deg, #fff 0%, var(--color-bg-alt) 100%);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-content {
  text-align: left;
}

.about-content .section-eyebrow {
  margin-bottom: 14px;
}

.about-content .section-title {
  text-align: left;
  margin-bottom: 24px;
}

.about-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--color-text);
  margin-bottom: 16px;
  font-weight: 500;
}

.about-content p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--color-text-2);
  margin-bottom: 16px;
}

.about-values {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.value-item {
  padding: 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}

.value-item:hover {
  border-color: var(--color-copper);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.value-num {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  color: var(--color-copper);
  margin-bottom: 8px;
}

.value-item h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}

.value-item p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-2);
  margin: 0;
}

.about-visual {
  position: sticky;
  top: 100px;
}

.about-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
}

.ac-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.ac-row:last-child {
  border-bottom: none;
}

.ac-label {
  font-size: 13px;
  color: var(--color-text-3);
  flex-shrink: 0;
}

.ac-val {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  text-align: right;
}

/* ============================================
   联系方式
   ============================================ */
.contact-section {
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, #fff 100%);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.contact-card {
  display: flex;
  flex-direction: column;
  padding: 28px 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(200, 162, 110, 0.05), transparent);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
}

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

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

.cc-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-copper-light);
  border-radius: 50%;
  margin: 0 auto 16px;
  position: relative;
  z-index: 1;
  transition: all var(--duration-base) var(--ease-out);
}

.contact-card:hover .cc-icon {
  background: linear-gradient(135deg, var(--color-copper), var(--color-copper-light));
  color: var(--color-primary-dark);
  transform: scale(1.05);
}

.cc-label {
  font-size: 13px;
  color: var(--color-text-3);
  margin-bottom: 6px;
  position: relative;
  z-index: 1;
}

.cc-value {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 6px;
  position: relative;
  z-index: 1;
  word-break: break-all;
}

.cc-tip {
  font-size: 12px;
  color: var(--color-text-3);
  position: relative;
  z-index: 1;
}

.contact-card-ewm {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.ewm-box {
  margin-top: 8px;
  padding: 12px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  position: relative;
  z-index: 1;
}

.ewm-box img {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-sm);
}

.ewm-tip {
  margin-top: 8px;
  font-size: 12px;
  color: var(--color-copper);
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* ============================================
   底部
   ============================================ */
.site-footer {
  background: linear-gradient(180deg, var(--color-primary-dark) 0%, #030d1a 100%);
  color: var(--color-text-light-2);
  padding: 60px 0 24px;
  font-size: 13px;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1.2fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand p {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--color-text-light-2);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-light);
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-light);
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--color-copper);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  font-size: 13px;
  color: var(--color-text-light-2);
  transition: all var(--duration-fast) var(--ease-out);
}

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

.footer-contact li {
  font-size: 13px;
  line-height: 1.7;
}

.footer-links {
  padding: 28px 0;
  border-top: 1px solid var(--color-border-dark);
  border-bottom: 1px solid var(--color-border-dark);
  margin-bottom: 24px;
}

.footer-links h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-light);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.footer-link-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 10px 14px;
}

.footer-link-grid a {
  font-size: 12px;
  color: var(--color-text-light-2);
  padding: 4px 0;
  transition: color var(--duration-fast) var(--ease-out);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.footer-link-grid a:hover {
  color: var(--color-copper-light);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-top: 24px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.55);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--duration-fast) var(--ease-out);
}

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

.beian {
  position: relative;
  padding-left: 22px;
}

.beian::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23C8A26E'%3E%3Cpath d='M12 1L3 5v6c0 5.55 3.84 10.74 9 12 5.16-1.26 9-6.45 9-12V5l-9-4z'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* 返回顶部 */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-copper), var(--color-copper-light));
  color: var(--color-primary-dark);
  border-radius: 50%;
  box-shadow: var(--shadow-copper);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--duration-base) var(--ease-out);
}

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

.back-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(200, 162, 110, 0.5);
}

/* 数据可见性动画 */
[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
  transition-delay: var(--reveal-delay, 0s);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}