/* ==========================================================================
   英摩客 Umccoy - 企业级 SSD 官方网站
   Apple Minimalist Design System
   ========================================================================== */

:root {
  /* Core Apple Neutral Palette */
  --apple-black: #000000;
  --apple-dark: #1d1d1f;
  --apple-dark-secondary: #424245;
  --apple-gray-bg: #f5f5f7;
  --apple-card-bg: #ffffff;
  --apple-subtle-border: rgba(0, 0, 0, 0.08);
  --apple-subtle-border-light: rgba(0, 0, 0, 0.05);
  --apple-text-primary: #1d1d1f;
  --apple-text-secondary: #86868b;
  --apple-text-tertiary: #a1a1a6;
  --apple-white: #ffffff;

  /* Brand Accents */
  --brand-blue: #0072BC;
  --brand-blue-hover: #005a96;
  --brand-blue-light: rgba(0, 114, 188, 0.08);
  --brand-orange: #F39200;
  --brand-orange-light: rgba(243, 146, 0, 0.1);
  --apple-link: #06c;
  --apple-link-hover: #004080;

  /* Shadows & Glassmorphism */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 24px 56px rgba(0, 0, 0, 0.12);
  --glass-blur: blur(20px);
  --glass-nav: rgba(255, 255, 255, 0.82);

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 9999px;

  /* Typography */
  --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Icons", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", Menlo, Consolas, Monaco, monospace;

  /* Layout */
  --container-max: 1200px;
  --section-padding: clamp(4rem, 8vw, 7.5rem);
}

/* Dark Section Variables (for Contrast Zones) */
.theme-dark {
  --section-bg: #000000;
  --card-bg: #161617;
  --card-border: rgba(255, 255, 255, 0.1);
  --text-primary: #f5f5f7;
  --text-secondary: #86868b;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-stack);
  color: var(--apple-text-primary);
  background-color: #fafafc;
  line-height: 1.5;
  overflow-x: hidden;
  letter-spacing: -0.015em;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

/* Layout Utilities */
.container {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.25rem, 4vw, 2.5rem);
  padding-right: clamp(1.25rem, 4vw, 2.5rem);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--glass-nav);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--apple-subtle-border);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo img {
  height: 38px;
  width: auto;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--apple-dark-secondary);
  transition: color 0.2s ease;
  position: relative;
  padding: 0.5rem 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--brand-blue);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Language Toggle Switcher */
.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  background: var(--apple-gray-bg);
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-pill);
  padding: 0.3rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--apple-dark-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.lang-btn:hover {
  background: #ebebee;
  color: var(--apple-text-primary);
}

.lang-indicator {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--brand-blue);
  border-radius: 50%;
}

/* Apple Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--brand-blue);
  color: var(--apple-white);
  box-shadow: 0 2px 6px rgba(0, 114, 188, 0.25);
}

.btn-primary:hover {
  background-color: var(--brand-blue-hover);
  transform: scale(1.02);
  box-shadow: 0 4px 12px rgba(0, 114, 188, 0.35);
}

.btn-secondary {
  background-color: #ebebec;
  color: var(--apple-dark);
  border-color: rgba(0, 0, 0, 0.05);
}

.btn-secondary:hover {
  background-color: #e2e2e5;
  transform: scale(1.02);
}

.btn-accent {
  background-color: var(--brand-orange);
  color: var(--apple-white);
  box-shadow: 0 2px 6px rgba(243, 146, 0, 0.25);
}

.btn-accent:hover {
  background-color: #d88200;
  transform: scale(1.02);
  box-shadow: 0 4px 12px rgba(243, 146, 0, 0.35);
}

.btn-ghost {
  background-color: transparent;
  color: var(--brand-blue);
  border-color: var(--brand-blue);
}

.btn-ghost:hover {
  background-color: var(--brand-blue-light);
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--apple-dark);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding-top: clamp(3rem, 6vw, 6rem);
  padding-bottom: clamp(3.5rem, 7vw, 6.5rem);
  text-align: center;
  position: relative;
  background: radial-gradient(100% 50% at 50% 0%, rgba(0, 114, 188, 0.04) 0%, rgba(255, 255, 255, 0) 100%), #ffffff;
  border-bottom: 1px solid var(--apple-subtle-border-light);
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background: var(--apple-gray-bg);
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--apple-dark-secondary);
  margin-bottom: 1.5rem;
  letter-spacing: 0.01em;
}

.hero-pill-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #34c759;
  box-shadow: 0 0 0 2px rgba(52, 199, 89, 0.2);
}

.hero-title {
  font-size: clamp(2.25rem, 5.2vw, 4.25rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.08;
  color: var(--apple-text-primary);
  max-width: 900px;
  margin: 0 auto 1.25rem;
}

.hero-subtitle {
  font-size: clamp(1.0625rem, 2vw, 1.375rem);
  font-weight: 400;
  line-height: 1.5;
  color: var(--apple-text-secondary);
  max-width: 760px;
  margin: 0 auto 2.5rem;
  letter-spacing: -0.01em;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.hero-cta-group .btn {
  padding: 0.875rem 2rem;
  font-size: 1rem;
}

/* Hero Hardware Art / Bento Badge */
.hero-visual-card {
  max-width: 1040px;
  margin: 0 auto;
  background: linear-gradient(180deg, #ffffff 0%, #f7f7f9 100%);
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  text-align: left;
}

.hero-stat-item {
  padding: 1rem;
  border-left: 2px solid var(--apple-subtle-border);
}

.hero-stat-item:first-child {
  border-left: none;
}

.hero-stat-title {
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  color: var(--brand-blue);
  margin-bottom: 0.35rem;
}

.hero-stat-value {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--apple-dark);
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.hero-stat-desc {
  font-size: 0.875rem;
  color: var(--apple-text-secondary);
  line-height: 1.4;
}

/* ==========================================================================
   Section Headers (Apple Typography)
   ========================================================================== */
.section {
  padding-top: var(--section-padding);
  padding-bottom: var(--section-padding);
}

.section-alt {
  background-color: #f5f5f7;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brand-blue);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(2rem, 3.8vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--apple-text-primary);
  margin-bottom: 1rem;
}

.section-desc {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--apple-text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Bento Grid - Our Business (六大业务体系)
   ========================================================================== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
}

.bento-card {
  background: var(--apple-card-bg);
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.bento-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 114, 188, 0.25);
}

.bento-card-col-6 {
  grid-column: span 6;
}

.bento-card-col-4 {
  grid-column: span 4;
}

.bento-card-col-12 {
  grid-column: span 12;
}

.bento-card-highlight {
  background: linear-gradient(145deg, #ffffff 0%, #f0f6fa 100%);
  border-color: rgba(0, 114, 188, 0.2);
}

.bento-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--brand-blue-light);
  color: var(--brand-blue);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.bento-icon-box.orange {
  background: var(--brand-orange-light);
  color: var(--brand-orange);
}

.bento-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--apple-text-primary);
  margin-bottom: 0.75rem;
}

.bento-card-text {
  font-size: 0.9375rem;
  color: var(--apple-text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.bento-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.bento-tag {
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--apple-gray-bg);
  color: var(--apple-dark-secondary);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--apple-subtle-border-light);
}

/* ==========================================================================
   Technical Scope Section (技术与接口范围 - 规范矩阵)
   ========================================================================== */
.tech-container {
  background: #ffffff;
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-xl);
  padding: clamp(2rem, 5vw, 3.5rem);
  box-shadow: var(--shadow-sm);
}

.tech-disclaimer-box {
  background: var(--apple-gray-bg);
  border-left: 4px solid var(--brand-blue);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.25rem 1.5rem;
  margin-bottom: 2.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.tech-disclaimer-text {
  font-size: 0.9375rem;
  color: var(--apple-dark-secondary);
  line-height: 1.55;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.tech-item {
  background: #fafafc;
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: all 0.2s ease;
}

.tech-item:hover {
  background: #ffffff;
  border-color: var(--brand-blue);
  box-shadow: var(--shadow-sm);
}

.tech-item-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--brand-blue);
  background: var(--brand-blue-light);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
}

.tech-item-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--apple-text-primary);
  margin-bottom: 0.5rem;
}

.tech-item-desc {
  font-size: 0.875rem;
  color: var(--apple-text-secondary);
  line-height: 1.5;
}

/* Form Factors Bar */
.form-factors-bar {
  border-top: 1px solid var(--apple-subtle-border);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.form-factors-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--apple-text-primary);
}

.form-factors-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.form-factor-chip {
  font-size: 0.8125rem;
  font-weight: 600;
  font-family: var(--font-mono);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-pill);
  background: var(--apple-gray-bg);
  border: 1px solid var(--apple-subtle-border);
  color: var(--apple-dark);
}

/* ==========================================================================
   Global Network (全球服务网络与物流协同)
   ========================================================================== */
.network-layout, .network-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.network-card {
  background: var(--apple-card-bg);
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-xl);
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.network-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 114, 188, 0.25);
}

.network-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  background: var(--brand-blue-light);
  color: var(--brand-blue);
  width: fit-content;
  margin-bottom: 1rem;
}

.network-badge.badge-warehouse {
  background: var(--brand-orange-light);
  color: var(--brand-orange);
}

.network-badge.badge-sales {
  background: rgba(88, 86, 214, 0.1);
  color: #5856d6;
}

.network-badge.badge-market {
  background: rgba(52, 199, 89, 0.1);
  color: #34c759;
}

.network-city {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--apple-text-primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.network-role {
  font-size: 0.9375rem;
  color: var(--apple-text-secondary);
  line-height: 1.6;
}

.network-nodes-card {
  background: #ffffff;
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.node-group {
  border-bottom: 1px solid var(--apple-subtle-border-light);
  padding-bottom: 1.25rem;
}

.node-group:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.node-type-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.node-type-hub { color: #0072BC; }
.node-type-warehouse { color: #F39200; }
.node-type-sales { color: #5856d6; }
.node-type-market { color: #34c759; }

.node-locations {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--apple-text-primary);
  margin-bottom: 0.25rem;
}

.node-desc {
  font-size: 0.875rem;
  color: var(--apple-text-secondary);
  line-height: 1.5;
}

/* Interactive Map Simulation */
.network-map-card {
  background: linear-gradient(135deg, #1c1c1e 0%, #2c2c2e 100%);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  color: #ffffff;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.map-svg-canvas {
  width: 100%;
  height: 280px;
  margin: 1.5rem 0;
}

.map-legend {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 1.25rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: #a1a1a6;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.legend-dot.blue { background-color: #0072BC; box-shadow: 0 0 8px #0072BC; }
.legend-dot.orange { background-color: #F39200; box-shadow: 0 0 8px #F39200; }
.legend-dot.purple { background-color: #af52de; box-shadow: 0 0 8px #af52de; }
.legend-dot.green { background-color: #34c759; box-shadow: 0 0 8px #34c759; }

/* ==========================================================================
   About Section (关于英摩客)
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 2.5rem;
  align-items: center;
}

.about-content {
  background: #ffffff;
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-xl);
  padding: clamp(2rem, 4vw, 3.5rem);
  box-shadow: var(--shadow-sm);
}

.about-paragraph {
  font-size: 1.0625rem;
  color: var(--apple-dark-secondary);
  line-height: 1.75;
  margin-bottom: 1.5rem;
}

.about-paragraph:last-child {
  margin-bottom: 0;
}

.about-values-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.value-card {
  background: #ffffff;
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.75rem;
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.value-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.value-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--apple-gray-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--brand-blue);
}

.value-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--apple-text-primary);
  margin-bottom: 0.25rem;
}

.value-desc {
  font-size: 0.875rem;
  color: var(--apple-text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   Contact & Dual Inquiry Portal (联系我们与双通道私密表单)
   ========================================================================== */
.portal-card {
  background: #ffffff;
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  max-width: 960px;
  margin: 0 auto;
  overflow: hidden;
}

/* Apple Segmented Control */
.segmented-control-wrapper {
  background: var(--apple-gray-bg);
  padding: 1.5rem;
  border-bottom: 1px solid var(--apple-subtle-border);
  display: flex;
  justify-content: center;
}

.segmented-control {
  background: rgba(0, 0, 0, 0.06);
  padding: 4px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  gap: 4px;
}

.segment-btn {
  border: none;
  background: transparent;
  padding: 0.65rem 2rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--apple-dark-secondary);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.segment-btn.active {
  background: #ffffff;
  color: var(--apple-text-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.segment-btn.active.supply-tab {
  color: var(--brand-orange);
}

.segment-btn.active.buy-tab {
  color: var(--brand-blue);
}

.portal-body {
  padding: clamp(2rem, 5vw, 3.5rem);
}

.form-channel-intro {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--apple-subtle-border-light);
}

.form-channel-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--apple-text-primary);
  margin-bottom: 0.35rem;
}

.form-channel-desc {
  font-size: 0.9375rem;
  color: var(--apple-text-secondary);
}

/* Apple Form Fields */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.form-col-2 {
  grid-column: span 2;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--apple-dark);
}

.form-label .required {
  color: #ff3b30;
  margin-left: 2px;
}

.form-input, .form-select, .form-textarea {
  background: #fafafc;
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  color: var(--apple-text-primary);
  transition: all 0.2s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  background: #ffffff;
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(0, 114, 188, 0.15);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

/* File Upload Area */
.file-dropzone {
  border: 2px dashed var(--apple-subtle-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  background: #fafafc;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.file-dropzone:hover, .file-dropzone.dragover {
  border-color: var(--brand-blue);
  background: var(--brand-blue-light);
}

.file-dropzone-icon {
  margin: 0 auto 0.5rem;
  color: var(--apple-text-secondary);
}

.file-dropzone-text {
  font-size: 0.875rem;
  color: var(--apple-dark-secondary);
}

.file-dropzone-sub {
  font-size: 0.75rem;
  color: var(--apple-text-tertiary);
  margin-top: 0.25rem;
}

.file-input-hidden {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.file-list-preview {
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  color: var(--brand-blue);
  display: none;
}

/* Form Actions */
.form-footer-bar {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--apple-subtle-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.privacy-note {
  font-size: 0.8125rem;
  color: var(--apple-text-secondary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.form-submit-btn {
  padding: 0.85rem 2.5rem;
  font-size: 1rem;
  font-weight: 600;
}

/* Success Message Box */
.form-success-box {
  display: none;
  text-align: center;
  padding: 3rem 2rem;
}

.success-icon-badge {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #e8f5e9;
  color: #2e7d32;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

/* Direct Contacts Bar */
.direct-contact-bar {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.contact-card {
  background: #ffffff;
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--apple-gray-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-blue);
  flex-shrink: 0;
}

.contact-card-title {
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--apple-text-secondary);
  margin-bottom: 0.25rem;
}

.contact-card-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--apple-text-primary);
}

/* ==========================================================================
   Compliance & Legal Section (合规与免责声明)
   ========================================================================== */
.compliance-section {
  background: #f5f5f7;
  border-top: 1px solid var(--apple-subtle-border);
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
}

.compliance-box {
  background: #ffffff;
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-lg);
  padding: 2rem 2.5rem;
}

.compliance-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--apple-dark);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.compliance-text {
  font-size: 0.875rem;
  color: var(--apple-dark-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: #f5f5f7;
  border-top: 1px solid var(--apple-subtle-border);
  padding-top: 3.5rem;
  padding-bottom: 2.5rem;
  font-size: 0.8125rem;
  color: var(--apple-text-secondary);
}

.footer-top {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.footer-logo {
  height: 38px;
  width: auto;
  object-fit: contain;
  margin-bottom: 1.25rem;
  display: block;
}

.footer-brand-desc, .footer-desc {
  max-width: 320px;
  line-height: 1.6;
  color: var(--apple-text-secondary);
  font-size: 0.875rem;
}

.footer-links-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer-col-title, .footer-heading {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--apple-dark);
  margin-bottom: 1.25rem;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  color: var(--apple-text-secondary);
  font-size: 0.875rem;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: var(--brand-blue);
}

.footer-compliance {
  background: #ffffff;
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.75rem;
  margin-bottom: 2rem;
}

.footer-bottom {
  border-top: 1px solid var(--apple-subtle-border);
  padding-top: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copyright {
  font-size: 0.75rem;
}

.footer-badges {
  display: flex;
  gap: 1rem;
  font-size: 0.75rem;
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-visual-card {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .hero-stat-item {
    border-left: none;
    border-bottom: 1px solid var(--apple-subtle-border);
    padding-bottom: 1rem;
  }
  .hero-stat-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
  .bento-card-col-6, .bento-card-col-4 {
    grid-column: span 12;
  }
  .network-layout {
    grid-template-columns: 1fr;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-inner {
    height: 56px;
  }
  .brand-logo img {
    height: 26px;
  }
  .nav-actions {
    gap: 0.5rem;
  }
  .lang-btn {
    padding: 0.25rem 0.55rem;
    font-size: 0.75rem;
    white-space: nowrap;
  }
  .nav-actions .btn-primary {
    display: none;
  }
  .mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem;
  }
  .hero-title {
    font-size: clamp(1.4rem, 6.2vw, 2.2rem);
    line-height: 1.22;
    letter-spacing: -0.02em;
    word-break: normal;
  }
  .hero-subtitle {
    font-size: 0.9375rem;
    line-height: 1.5;
  }
  .hero-cta-group {
    flex-direction: column;
    gap: 0.75rem;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
  .nav-menu {
    display: none;
  }
  .nav-menu.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 56px;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: var(--glass-blur);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--apple-subtle-border);
    gap: 1.25rem;
    align-items: flex-start;
  }
  .mobile-toggle {
    display: block;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-col-2 {
    grid-column: span 1;
  }
  .footer-links-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .portal-body {
    padding: 1.5rem;
  }
}

/* ==========================================================================
   Multi-Page Subpage Enhancements & Utilities
   ========================================================================== */
.page-hero {
  padding-top: clamp(2.5rem, 5vw, 4.5rem);
  padding-bottom: clamp(2.5rem, 5vw, 4.5rem);
  text-align: center;
  background: radial-gradient(100% 60% at 50% 0%, rgba(0, 114, 188, 0.05) 0%, rgba(255, 255, 255, 0) 100%), #ffffff;
  border-bottom: 1px solid var(--apple-subtle-border-light);
}

.page-breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--apple-text-secondary);
  margin-bottom: 1rem;
}

.page-breadcrumb a {
  color: var(--apple-text-secondary);
}

.page-breadcrumb a:hover {
  color: var(--brand-blue);
}

.page-breadcrumb .sep {
  color: var(--apple-text-tertiary);
}

.nav-link.active {
  color: var(--brand-blue);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--brand-blue);
  border-radius: var(--radius-pill);
}

/* Process Steps Grid (Workflow) */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.process-card {
  background: var(--apple-card-bg);
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  position: relative;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.process-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 114, 188, 0.25);
}

.process-step-num {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--brand-blue);
  background: var(--brand-blue-light);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1rem;
}

.process-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--apple-dark);
  margin-bottom: 0.75rem;
}

.process-card-desc {
  font-size: 0.875rem;
  color: var(--apple-text-secondary);
  line-height: 1.6;
}

/* Technical Specification Comparison Table */
.spec-table-card {
  background: var(--apple-card-bg);
  border: 1px solid var(--apple-subtle-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-top: 2rem;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.spec-table th {
  background: var(--apple-gray-bg);
  color: var(--apple-dark);
  font-weight: 600;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--apple-subtle-border);
}

.spec-table td {
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--apple-subtle-border-light);
  color: var(--apple-dark-secondary);
}

.spec-table tr:last-child td {
  border-bottom: none;
}

.spec-table tr:hover td {
  background-color: rgba(0, 114, 188, 0.02);
}

.spec-tag {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  background: #f0f0f3;
  color: #333;
}

.spec-tag-blue {
  background: var(--brand-blue-light);
  color: var(--brand-blue);
}

.spec-tag-orange {
  background: var(--brand-orange-light);
  color: var(--brand-orange);
}

/* Call to action bar on subpages */
.subpage-cta-banner {
  background: linear-gradient(135deg, #1c1c1e 0%, #000000 100%) !important;
  color: #ffffff !important;
  border-radius: var(--radius-xl);
  padding: clamp(3.5rem, 6vw, 4.5rem) clamp(1.5rem, 5vw, 4rem);
  text-align: center;
  margin-top: 4rem;
  margin-bottom: 4rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.subpage-cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  width: 600px;
  height: 600px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(0, 114, 188, 0.25) 0%, rgba(0,0,0,0) 70%);
  pointer-events: none;
}

.subpage-cta-title {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
  color: #ffffff !important;
  position: relative;
}

.subpage-cta-desc {
  font-size: 1.05rem;
  color: #a1a1a6 !important;
  max-width: 680px;
  margin: 0 auto 2.25rem auto;
  line-height: 1.6;
  position: relative;
}

.subpage-cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  position: relative;
}

.subpage-cta-actions .btn-secondary {
  background: rgba(255, 255, 255, 0.15) !important;
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.25) !important;
}

.subpage-cta-actions .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25) !important;
  color: #ffffff !important;
}

@media (max-width: 1024px) {
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .process-grid {
    grid-template-columns: 1fr;
  }
  .spec-table-card {
    overflow-x: auto;
  }
}