/* ===== 全局变量与重置 ===== */
:root {
  --color-primary: #1E6FFF;
  --color-primary-dark: #0A2540;
  --color-primary-darker: #061A2E;
  --color-primary-light: #4DB8FF;
  --color-accent: #00D4FF;
  --color-bg: #FFFFFF;
  --color-bg-soft: #F5F8FC;
  --color-bg-dark: #0A1628;
  --color-bg-darker: #060E1C;
  --color-text: #1A2B45;
  --color-text-soft: #5A6B85;
  --color-text-light: #8A9AAF;
  --color-border: #E2E8F0;
  --color-border-light: #EEF2F7;
  --shadow-sm: 0 2px 8px rgba(10, 37, 64, 0.06);
  --shadow-md: 0 8px 24px rgba(10, 37, 64, 0.08);
  --shadow-lg: 0 20px 48px rgba(10, 37, 64, 0.12);
  --shadow-glow: 0 0 40px rgba(30, 111, 255, 0.25);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-num: 'Inter', 'Noto Sans SC', monospace;
  --max-w: 1280px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

ul, ol {
  list-style: none;
}

/* ===== 通用工具类 ===== */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 120px 0;
  position: relative;
}

.section-title-group {
  text-align: center;
  margin-bottom: 64px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
  position: relative;
  padding: 0 20px;
}

.section-eyebrow::before,
.section-eyebrow::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 12px;
  height: 1px;
  background: var(--color-primary);
  opacity: 0.5;
}

.section-eyebrow::before { left: 0; }
.section-eyebrow::after { right: 0; }

.section-title {
  font-size: 42px;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--color-text-soft);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== 滚动动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: var(--transition);
  padding: 16px 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(30, 111, 255, 0.08);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 12px 0;
  box-shadow: 0 4px 20px rgba(10, 37, 64, 0.08);
  border-bottom: 1px solid rgba(30, 111, 255, 0.1);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.navbar-logo img {
  height: 44px;
  width: auto;
}

.navbar-logo-text {
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 1px;
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 10px 18px;
  color: var(--color-text);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 24px;
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 12px;
  min-width: 220px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--color-border-light);
}

.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown-item {
  display: block;
  padding: 12px 16px;
  color: var(--color-text);
  font-size: 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-dropdown-item:hover {
  background: var(--color-bg-soft);
  color: var(--color-primary);
}

.navbar-cta {
  background: var(--color-primary);
  color: #fff;
  padding: 10px 24px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.navbar-cta:hover {
  background: var(--color-primary-light);
  box-shadow: 0 4px 16px rgba(30, 111, 255, 0.35);
  transform: translateY(-1px);
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary-dark);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: #fff;
}

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

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: #fff;
}

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 320px;
  height: 100vh;
  background: #fff;
  z-index: 999;
  padding: 80px 24px 32px;
  transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
  box-shadow: -8px 0 32px rgba(0, 0, 0, 0.1);
}

.mobile-menu.open {
  right: 0;
}

.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(10, 37, 64, 0.4);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.mobile-menu-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-item {
  border-bottom: 1px solid var(--color-border-light);
}

.mobile-nav-link {
  display: block;
  padding: 16px 0;
  color: var(--color-text);
  font-size: 16px;
  font-weight: 500;
}

.mobile-nav-link:active {
  color: var(--color-primary);
}

.mobile-nav-sublink {
  display: block;
  padding: 12px 0 12px 20px;
  color: var(--color-text-soft);
  font-size: 14px;
  border-top: 1px solid var(--color-border-light);
}

/* ===== Hero 区 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--color-bg-darker);
}

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

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(6, 14, 28, 0.95) 0%, rgba(10, 37, 64, 0.8) 50%, rgba(6, 14, 28, 0.9) 100%);
}

/* 粒子/光点背景 */
.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--color-primary-light);
  border-radius: 50%;
  opacity: 0.6;
  box-shadow: 0 0 10px var(--color-primary-light);
  animation: float-particle 15s infinite ease-in-out;
}

@keyframes float-particle {
  0%, 100% { transform: translateY(0) translateX(0); opacity: 0.3; }
  50% { transform: translateY(-100px) translateX(20px); opacity: 0.8; }
}

.hero-content {
  position: relative;
  z-index: 2;
  color: #fff;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
}

.hero-text {
  max-width: 720px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: rgba(30, 111, 255, 0.15);
  border: 1px solid rgba(77, 184, 255, 0.3);
  border-radius: 50px;
  font-size: 14px;
  color: var(--color-primary-light);
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

.hero-eyebrow-dot {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  font-size: 64px;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 20px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 40px;
  max-width: 620px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 8px 24px rgba(30, 111, 255, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(30, 111, 255, 0.5);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 500;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary-light);
  background: rgba(30, 111, 255, 0.1);
}

/* Hero 产品卡片 */
.hero-products {
  position: absolute;
  right: 32px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 380px;
}

.hero-product-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  color: #fff;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.hero-product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--color-primary-light);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.hero-product-card:hover {
  transform: translateX(-8px);
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(77, 184, 255, 0.3);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
}

.hero-product-card:hover::before {
  opacity: 1;
}

.hero-product-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, rgba(30, 111, 255, 0.3), rgba(77, 184, 255, 0.1));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--color-primary-light);
}

.hero-product-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.hero-product-desc {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
}

/* Hero 底部滚动提示 */
.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 12px;
  letter-spacing: 2px;
  animation: scroll-bounce 2s infinite;
}

.hero-scroll-indicator .scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.5), transparent);
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ===== 产品板块 ===== */
.products-section {
  background: var(--color-bg-soft);
}

/* 产品 Tab 切换 */
.product-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.product-tab {
  padding: 14px 32px;
  background: #fff;
  border: 1.5px solid var(--color-border);
  border-radius: 50px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-soft);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 10px;
}

.product-tab:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

.product-tab.active {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 8px 20px rgba(30, 111, 255, 0.3);
}

.product-tab-icon {
  font-size: 18px;
}

/* 产品面板 */
.product-panel {
  display: none;
  animation: fadeInUp 0.5s ease;
}

.product-panel.active {
  display: block;
}

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

/* 产品头部 */
.product-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 80px;
}

.product-header-text {
}

.product-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(30, 111, 255, 0.1);
  color: var(--color-primary);
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.product-name {
  font-size: 40px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 20px;
  line-height: 1.2;
}

.product-slogan {
  font-size: 18px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 32px;
}

.product-features {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.product-feature-chip {
  padding: 8px 18px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 13px;
  color: var(--color-text);
  transition: var(--transition);
}

.product-feature-chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.product-header-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.product-header-image img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  display: block;
}

.product-header-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(30, 111, 255, 0.2), transparent);
}

/* 产品详情区块标题 */
.product-detail-section {
  margin-bottom: 80px;
}

.product-detail-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.product-detail-title::before {
  content: '';
  width: 4px;
  height: 28px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-primary-light));
  border-radius: 2px;
}

.product-detail-desc {
  font-size: 15px;
  color: var(--color-text-soft);
  margin-bottom: 32px;
  max-width: 720px;
}

/* 特色卡片网格 - 天枢8大特色 */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--color-border-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  transform: scaleX(0);
  transition: transform 0.4s ease;
  transform-origin: left;
}

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

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

.feature-card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(30, 111, 255, 0.12), rgba(77, 184, 255, 0.08));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--color-primary);
  font-size: 22px;
}

.feature-card-num {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary-light);
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.feature-card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 12px;
  line-height: 1.4;
}

.feature-card-text {
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.7;
}

/* 应用场景 */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.scenario-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  cursor: pointer;
}

.scenario-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.scenario-card:hover img {
  transform: scale(1.08);
}

.scenario-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 37, 64, 0.9) 0%, rgba(10, 37, 64, 0.3) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  transition: var(--transition);
}

.scenario-card:hover .scenario-overlay {
  background: linear-gradient(to top, rgba(30, 111, 255, 0.9) 0%, rgba(30, 111, 255, 0.4) 60%, transparent 100%);
}

.scenario-name {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.scenario-desc {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.6;
}

/* 平台赋能 */
.empower-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.empower-item {
  background: #fff;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 28px 16px 20px;
  text-align: center;
  transition: var(--transition);
}

.empower-item:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.empower-icon-img {
  width: 64px;
  height: 64px;
  margin: 0 auto 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.empower-icon-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.empower-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary-dark);
}

/* 直播云服务 - 经营模式 */
.mode-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.mode-card {
  background: #fff;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
}

.mode-card.recommended::before {
  content: '推荐';
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 50px;
}

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

.mode-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(30, 111, 255, 0.12), rgba(77, 184, 255, 0.08));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-primary);
  font-size: 26px;
}

.mode-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 12px;
}

.mode-desc {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
  margin-bottom: 16px;
}

.mode-note {
  font-size: 12px;
  color: var(--color-text-light);
  padding-top: 12px;
  border-top: 1px dashed var(--color-border);
  line-height: 1.6;
}

/* 商家工具表格 */
.tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.tools-category {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--color-border-light);
}

.tools-category-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.tools-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.tool-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--color-bg-soft);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--color-text);
  transition: var(--transition);
}

.tool-item:hover {
  background: rgba(30, 111, 255, 0.08);
  color: var(--color-primary);
}

.tool-item.optional::after {
  content: '按需';
  font-size: 10px;
  padding: 2px 6px;
  background: rgba(30, 111, 255, 0.1);
  color: var(--color-primary);
  border-radius: 4px;
  margin-left: auto;
}

.tool-dot {
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
}

/* 配置选择 - 直播云定制 */
.config-section {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--color-border-light);
  margin-bottom: 48px;
}

.config-row {
  display: flex;
  align-items: flex-start;
  margin-bottom: 32px;
  gap: 24px;
}

.config-row:last-child {
  margin-bottom: 0;
}

.config-label {
  flex-shrink: 0;
  width: 140px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary-dark);
  padding-top: 8px;
}

.config-label .required {
  color: #e74c3c;
  margin-left: 4px;
}

.config-options {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.config-option {
  padding: 8px 20px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--color-text);
  background: #fff;
  transition: var(--transition);
  cursor: pointer;
}

.config-option:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

.config-option.selected {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* 增值模块 */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.value-card {
  background: #fff;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 22px 22px;
  transition: var(--transition);
  cursor: pointer;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.value-card:hover {
  border-color: var(--color-primary-light);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.value-card-icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  background: linear-gradient(135deg, rgba(30, 111, 255, 0.12), rgba(77, 184, 255, 0.08));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 22px;
}

.value-card-content h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
  line-height: 1.35;
}

.value-card-content p {
  font-size: 13.5px;
  color: var(--color-text-soft);
  line-height: 1.65;
}

/* 便利柜系统 - 系统分类 */
.system-category {
  margin-bottom: 48px;
}

.system-category-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-border-light);
}

.system-category-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 22px;
}

.system-category-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.system-category-subtitle {
  font-size: 13px;
  color: var(--color-text-light);
  margin-left: auto;
}

.system-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.system-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.system-chip:hover {
  border-color: var(--color-primary);
  background: rgba(30, 111, 255, 0.04);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.system-chip-code {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
  padding: 2px 8px;
  background: rgba(30, 111, 255, 0.1);
  border-radius: 4px;
}

.system-chip-name {
  font-size: 13px;
  color: var(--color-text);
}

/* 关于我们 */
.about-section {
  background: #fff;
  position: relative;
  overflow: hidden;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 100px;
}

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-image img {
  width: 100%;
  height: 480px;
  object-fit: cover;
}

.about-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 37, 64, 0.3), transparent);
}

.about-stats {
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
  display: flex;
  gap: 24px;
  z-index: 2;
}

.about-stat {
  flex: 1;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-md);
  padding: 20px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.about-stat-num {
  font-family: var(--font-num);
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 4px;
}

.about-stat-label {
  font-size: 12px;
  opacity: 0.8;
}

.about-text h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 28px;
  line-height: 1.3;
}

.about-desc {
  font-size: 16px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 32px;
}

.about-abilities {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-ability {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 24px;
  background: var(--color-bg-soft);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.about-ability:hover {
  background: rgba(30, 111, 255, 0.06);
  transform: translateX(4px);
}

.about-ability-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 20px;
  box-shadow: var(--shadow-sm);
}

.about-ability-text h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 4px;
}

.about-ability-text p {
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.6;
}

/* 核心技术 */
.core-tech-section {
  background: linear-gradient(180deg, var(--color-bg-soft), #fff);
  padding-top: 40px;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.tech-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  border: 1px solid var(--color-border-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.tech-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

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

.tech-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, rgba(30, 111, 255, 0.12), rgba(77, 184, 255, 0.08));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--color-primary);
  font-size: 30px;
}

.tech-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 20px;
}

.tech-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tech-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.5;
}

.tech-feature-dot {
  width: 6px;
  height: 6px;
  background: var(--color-primary-light);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ===== 合作伙伴 ===== */
.partners-section {
  background: var(--color-bg-soft);
  padding-bottom: 140px;
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}

.partner-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 32px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 120px;
  border: 1px solid var(--color-border-light);
  transition: var(--transition);
  cursor: pointer;
}

.partner-card img {
  max-height: 56px;
  max-width: 160px;
  object-fit: contain;
  filter: grayscale(30%);
  opacity: 0.75;
  transition: var(--transition);
}

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

.partner-card:hover img {
  filter: grayscale(0%);
  opacity: 1;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--color-bg-darker);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
  max-width: 360px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.footer-logo img {
  height: 40px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.5);
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  transition: var(--transition);
}

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

.footer-bottom {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5em;
  justify-content: flex-start;
}

.footer-bottom-line > span,
.footer-bottom-line > .footer-icp {
  display: inline;
}

.footer-icp {
  color: rgba(255, 255, 255, 0.5);
  transition: var(--transition);
  margin-left: 0.25em;
}

.footer-icp:hover {
  color: var(--color-primary-light);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .section { padding: 80px 0; }
  .section-title { font-size: 34px; }
  .hero-title { font-size: 48px; }
  .hero-products { display: none; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .empower-grid { grid-template-columns: repeat(3, 1fr); }
  .product-header { grid-template-columns: 1fr; gap: 40px; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .tech-grid { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .mode-cards { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr 1fr; }
  .tools-grid { grid-template-columns: 1fr; }
  .config-row { flex-direction: column; gap: 12px; }
  .config-label { width: 100%; }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .section { padding: 64px 0; }
  .section-title { font-size: 28px; }
  .section-subtitle { font-size: 15px; }
  .section-title-group { margin-bottom: 40px; }

  .navbar { padding: 12px 0; }
  .navbar-logo img { height: 36px; }
  .navbar-nav, .navbar-cta { display: none; }
  .hamburger { display: flex; }

  .hero { min-height: 100vh; padding-top: 0; }
  .hero-content { padding: 0 20px; }
  .hero-title { font-size: 34px; }
  .hero-subtitle { font-size: 16px; }
  .hero-buttons { flex-direction: column; gap: 12px; }
  .btn-primary, .btn-outline { justify-content: center; width: 100%; }

  .product-name { font-size: 28px; }
  .product-tabs { gap: 8px; }
  .product-tab { padding: 10px 18px; font-size: 13px; }
  .feature-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .empower-grid { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: 1fr; }

  .config-section { padding: 24px; }
  .system-category-subtitle { display: none; }

  .about-text h2 { font-size: 26px; }
  .about-image img { height: 320px; }
  .about-stats { gap: 12px; }
  .about-stat { padding: 14px; }
  .about-stat-num { font-size: 22px; }

  .partners-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-card { height: 100px; padding: 20px; }
  .partner-card img { max-height: 44px; max-width: 120px; }

  .footer { padding: 40px 0 20px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; margin-bottom: 32px; padding-bottom: 32px; }
  .footer-bottom { text-align: center; }
  .footer-bottom-line { justify-content: center; }

  .product-detail-title { font-size: 22px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 28px; }
  .partners-grid { grid-template-columns: 1fr 1fr; }
  .empower-grid { grid-template-columns: repeat(2, 1fr); }
}