/* ============================================
   小哆共享文件柜 - 统一样式系统
   Design System v1.0
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  --color-primary: #1a6bff;
  --color-primary-dark: #0d4fcc;
  --color-primary-light: #e8f0ff;
  --color-secondary: #00c48c;
  --color-secondary-light: #e6faf3;
  --color-accent: #ff7a45;
  --color-accent-light: #fff2e8;

  --color-text: #1f2937;
  --color-text-secondary: #4b5563;
  --color-text-tertiary: #6b7280;
  --color-text-light: #9ca3af;
  --color-text-white: #ffffff;

  --color-bg: #ffffff;
  --color-bg-gray: #f9fafb;
  --color-bg-light: #f3f4f6;
  --color-bg-dark: #111827;

  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;
  --color-border-dark: #d1d5db;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;

  --container-max: 1200px;
  --nav-height: 68px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;
}

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

/* 品牌 ® 上标样式 */
.brand-reg {
  font-size: 35%;
  vertical-align: super;
  margin-left: 2px;
  position: relative;
  top: -0.4em;
  font-weight: normal;
  line-height: 0;
}

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

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

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

ul,
ol {
  list-style: none;
}

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

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

/* ---------- Container ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-align: center;
  line-height: 1.4;
  cursor: pointer;
  border: 1.5px solid transparent;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-white);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-text-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--color-bg);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

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

.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-lg {
  padding: 14px 36px;
  font-size: 16px;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
}

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-light);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
}

.nav-logo-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}

.nav-logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  color: var(--color-text-secondary);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

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

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.nav-toggle:hover {
  background-color: var(--color-bg-light);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  position: relative;
  transition: all var(--transition-fast);
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-fast);
}

.nav-toggle span::before {
  top: -7px;
}

.nav-toggle span::after {
  top: 7px;
}

.nav-toggle.open span {
  background-color: transparent;
}

.nav-toggle.open span::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle.open span::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 24px 24px;
  z-index: 999;
  box-shadow: var(--shadow-lg);
}

.mobile-menu.open {
  display: block;
}

.mobile-nav-link {
  display: block;
  padding: 14px 12px;
  color: var(--color-text);
  font-size: 16px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* ---------- Hero / Banner ---------- */
.hero {
  padding: calc(var(--nav-height) + 80px) 0 100px;
  background:
    linear-gradient(135deg, rgba(15, 30, 60, 0.55) 0%, rgba(15, 30, 60, 0.35) 50%, rgba(26, 107, 255, 0.25) 100%),
    url('../images/warehouse-bg.jpg') center/cover no-repeat,
    linear-gradient(180deg, #f0f5ff 0%, #ffffff 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(26, 107, 255, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 1;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -150px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 196, 140, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 1;
}

.hero-container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-secondary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.2); }
}

.hero-title {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #ffffff;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.hero-title-highlight {
  background: linear-gradient(135deg, #66b3ff, #00e0a3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 36px;
  line-height: 1.7;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.3);
}

.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 36px;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.hero-feature-icon {
  width: 22px;
  height: 22px;
  background-color: rgba(0, 224, 163, 0.25);
  color: #00e0a3;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

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

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 28px;
  width: 100%;
  max-width: 420px;
  position: relative;
  z-index: 2;
}

.hero-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 16px;
}

.hero-card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary), #4d8fff);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 24px;
}

.hero-card-title {
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.hero-card-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 400;
  color: var(--color-text-tertiary, #999);
  white-space: nowrap;
  margin-left: 6px;
}

.hero-card-subtitle {
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.hero-card-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px dashed var(--color-border-light);
}

.hero-card-item:last-child {
  border-bottom: none;
}

.hero-card-label {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.hero-card-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-secondary);
}

.hero-card-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background-color: var(--color-secondary-light);
  color: var(--color-secondary);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
}

.hero-float-card {
  position: absolute;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 16px 20px;
  z-index: 3;
}

.hero-float-card-1 {
  top: 20px;
  left: -50px;
  animation: float 4s ease-in-out infinite;
}

.hero-float-card-2 {
  bottom: 40px;
  right: -20px;
  animation: float 4s ease-in-out infinite 1s;
}

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

.hero-float-icon {
  font-size: 28px;
  margin-bottom: 4px;
}

.hero-float-text {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
}

.hero-float-sub {
  font-size: 11px;
  color: var(--color-text-tertiary);
}

/* ---------- Section Styles ---------- */
.section {
  padding: 80px 0;
}

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

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 16px;
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 17px;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

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

.feature-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border-light);
}

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

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--color-primary-light), #d6e4ff);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  transition: all var(--transition-normal);
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--color-primary), #4d8fff);
  transform: scale(1.05);
}

.feature-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ---------- Product Cards ---------- */
.products-section {
  padding: 80px 0;
}

.product-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.product-tab {
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-bg);
  color: var(--color-text-secondary);
  border: 1.5px solid var(--color-border);
  transition: all var(--transition-fast);
}

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

.product-tab.active {
  background: var(--color-primary);
  color: var(--color-text-white);
  border-color: var(--color-primary);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.products-grid-single {
  grid-template-columns: 1fr;
  max-width: 360px;
  margin-left: auto;
  margin-right: auto;
}

.products-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  max-width: 760px;
  margin: 0 auto;
}

.products-col {
  display: flex;
  flex-direction: column;
}

.products-col .product-card {
  flex: 1;
}

.product-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
}

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

.product-card.featured {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.product-card.featured::before {
  content: '推荐';
  position: absolute;
  top: 16px;
  right: 16px;
  background: linear-gradient(135deg, var(--color-accent), #ff9c6e);
  color: white;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
}

.product-card-header {
  padding: 28px 28px 20px;
  border-bottom: 1px solid var(--color-border-light);
}

.product-tag {
  display: inline-block;
  padding: 4px 12px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}

.product-name {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.product-desc {
  font-size: 14px;
  color: var(--color-text-tertiary);
}

.product-price {
  padding: 24px 28px;
  border-bottom: 1px solid var(--color-border-light);
}

.price-label {
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-bottom: 4px;
}

.price-value {
  font-size: 36px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.price-unit {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-tertiary);
}

.product-features {
  padding: 24px 28px;
  flex: 1;
}

.product-features-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--color-text);
}

.product-features-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.product-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.product-feature-check {
  color: var(--color-secondary);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

.product-card-footer {
  padding: 20px 28px 28px;
}

.product-more {
  text-align: center;
  margin-top: 24px;
}

.product-more a {
  font-weight: 500;
}

/* ---------- Scenarios Section ---------- */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-normal);
}

.scenario-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.scenario-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-secondary-light), #b7ebd4);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 20px;
}

.scenario-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.scenario-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.scenario-list {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scenario-list-item {
  font-size: 13px;
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.scenario-list-item::before {
  content: '•';
  color: var(--color-primary);
  font-weight: 700;
}

/* ---------- FAQ Section ---------- */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-primary-light);
}

.faq-question {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  color: var(--color-text);
  transition: all var(--transition-fast);
  user-select: none;
}

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

.faq-toggle {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
  font-size: 18px;
  color: var(--color-text-tertiary);
}

.faq-item.open .faq-toggle {
  transform: rotate(45deg);
  color: var(--color-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 24px 20px;
}

.faq-answer-content {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  padding-top: 4px;
  border-top: 1px solid var(--color-border-light);
  padding-top: 16px;
}

/* ---------- Contact Form ---------- */
.contact-section {
  padding: 80px 0;
  background: linear-gradient(180deg, #ffffff 0%, #f9fafb 100%);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-wrapper-single {
  grid-template-columns: 1fr;
  max-width: 500px;
}

.contact-info-centered {
  text-align: center;
}

.contact-methods-centered {
  flex-direction: row;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 40px;
}

.contact-methods-centered .contact-method-qr {
  align-items: center;
  justify-content: center;
}

.contact-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact-info h2 {
  font-size: 32px;
  margin-bottom: 16px;
}

.contact-info p {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  line-height: 1.7;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-method-icon {
  width: 48px;
  height: 48px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.contact-method-text h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 2px;
}

.contact-method-text p {
  font-size: 14px;
  color: var(--color-text-tertiary);
  margin: 0;
}

.contact-method-qr {
  align-items: flex-start;
}

.contact-qr-wrap {
  text-align: center;
  width: 100%;
}

.contact-qr-img {
  width: 120px;
  height: 120px;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: #fff;
  padding: 4px;
  border: 1px solid var(--color-border-light);
  margin-bottom: 8px;
}

.contact-qr-text {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin: 0;
  font-weight: 500;
}

/* 居中两二维码并排布局（覆盖默认纵向布局） */
.contact-methods.contact-methods-centered {
  flex-direction: row;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 40px;
}

.contact-methods.contact-methods-centered .contact-method {
  width: auto;
  flex: 0 0 auto;
}

.contact-methods.contact-methods-centered .contact-qr-wrap {
  width: auto;
}

.contact-form-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-light);
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

.form-label-required::after {
  content: ' *';
  color: var(--color-accent);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--color-text);
  background: var(--color-bg);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 107, 255, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-light);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
  font-family: inherit;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-submit {
  width: 100%;
  padding: 14px;
  font-size: 16px;
}

.form-note {
  font-size: 13px;
  color: var(--color-text-tertiary);
  text-align: center;
  margin-top: 12px;
}

/* ---------- Footer ---------- */
.footer {
  background-color: var(--color-bg-dark);
  color: #d1d5db;
  padding: 60px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-logo-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}

.footer-logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: #9ca3af;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social-icon {
  width: 36px;
  height: 36px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: all var(--transition-fast);
  color: #d1d5db;
}

.footer-social-icon:hover {
  background-color: var(--color-primary);
  color: white;
}

.footer-col-title {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
}

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

.footer-link {
  font-size: 14px;
  color: #9ca3af;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: #ffffff;
}

.footer-contact-item {
  font-size: 14px;
  color: #9ca3af;
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.footer-contact-item strong {
  color: #d1d5db;
  font-weight: 500;
  white-space: nowrap;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copyright {
  font-size: 13px;
  color: #6b7280;
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-link {
  font-size: 13px;
  color: #6b7280;
  transition: color var(--transition-fast);
}

.footer-bottom-link:hover {
  color: #d1d5db;
}

/* ---------- Page Header (内页顶部) ---------- */
.page-header {
  padding: calc(var(--nav-height) + 60px) 0 60px;
  background: linear-gradient(180deg, #f0f5ff 0%, #ffffff 100%);
  text-align: center;
}

.page-header-title {
  font-size: 40px;
  font-weight: 800;
  margin-bottom: 16px;
}

.page-header-desc {
  font-size: 17px;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

/* ---------- Product Detail Page ---------- */
.product-detail-section {
  padding: 60px 0 80px;
}

.product-detail-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-light);
  margin-bottom: 40px;
}

.product-detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border-light);
  flex-wrap: wrap;
  gap: 24px;
}

.product-detail-title {
  flex: 1;
}

.product-detail-title h2 {
  font-size: 32px;
  margin-bottom: 10px;
}

.product-detail-title p {
  font-size: 16px;
  color: var(--color-text-secondary);
}

.product-detail-badge {
  padding: 8px 20px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}

.detail-pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.detail-pricing-grid-single {
  grid-template-columns: 1fr;
  max-width: none;
  margin-left: 0;
  margin-right: 0;
}

.detail-pricing-card {
  background: var(--color-bg-gray);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  border: 2px solid transparent;
  transition: all var(--transition-fast);
}

.detail-pricing-card.highlight {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

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

.detail-pricing-price {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.detail-pricing-unit {
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-bottom: 12px;
}

.detail-pricing-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.detail-section {
  margin-bottom: 36px;
}

.detail-section:last-child {
  margin-bottom: 0;
}

.detail-section-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.detail-section-title::before {
  content: '';
  width: 4px;
  height: 20px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
  border-radius: 2px;
}

.detail-section-content {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.detail-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.detail-list-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.detail-list-icon {
  color: var(--color-secondary);
  font-weight: 700;
  flex-shrink: 0;
}

.warning-box {
  background-color: var(--color-accent-light);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 20px 24px;
  margin-top: 16px;
}

.warning-box-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.warning-box-content {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.forbidden-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.forbidden-item {
  background: var(--color-bg-gray);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.forbidden-icon {
  color: var(--color-accent);
  font-size: 18px;
}

/* ---------- Protocol Pages ---------- */
.protocol-page {
  padding: calc(var(--nav-height) + 40px) 0 80px;
}

.protocol-container {
  max-width: 900px;
  margin: 0 auto;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 48px 56px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-light);
}

.protocol-title {
  font-size: 32px;
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
}

.protocol-update {
  text-align: center;
  font-size: 14px;
  color: var(--color-text-tertiary);
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border-light);
}

.protocol-content h2 {
  font-size: 20px;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 14px;
  color: var(--color-text);
}

.protocol-content h2:first-child {
  margin-top: 0;
}

.protocol-content h3 {
  font-size: 17px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 10px;
  color: var(--color-text);
}

.protocol-content p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 14px;
}

.protocol-content ul,
.protocol-content ol {
  margin-bottom: 14px;
  padding-left: 24px;
}

.protocol-content li {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
  list-style: disc;
}

.protocol-content ol li {
  list-style: decimal;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  padding: 16px 0;
  background-color: var(--color-bg-gray);
  font-size: 14px;
  color: var(--color-text-tertiary);
  margin-top: var(--nav-height);
}

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

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

.breadcrumb-separator {
  margin: 0 8px;
  color: var(--color-text-light);
}

.breadcrumb-current {
  color: var(--color-text);
}

/* ---------- Stats Section ---------- */
.stats-section {
  padding: 60px 0;
  background: linear-gradient(135deg, var(--color-primary), #4d8fff);
  color: white;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  text-align: center;
  justify-items: center;
}

.stat-number {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 15px;
  opacity: 0.9;
}

/* ---------- Process Steps ---------- */
.steps-section {
  padding: 80px 0;
}

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

.step-card {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-number {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-primary), #4d8fff);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 800;
  margin: 0 auto 16px;
}

.step-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ---------- CTA Banner ---------- */
.cta-banner {
  padding: 60px 0;
  background: linear-gradient(135deg, #1a6bff 0%, #00c48c 100%);
  text-align: center;
  color: white;
}

.cta-banner h2 {
  font-size: 32px;
  color: white;
  margin-bottom: 12px;
}

.cta-banner p {
  font-size: 17px;
  opacity: 0.9;
  margin-bottom: 28px;
}

.cta-banner .btn-primary {
  background: white;
  color: var(--color-primary);
  border-color: white;
}

.cta-banner .btn-primary:hover {
  background: #f0f5ff;
  border-color: #f0f5ff;
  color: var(--color-primary-dark);
}

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

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

  .products-row {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    max-width: 100%;
  }

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

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

  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-features {
    justify-content: center;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-visual {
    margin-top: 40px;
  }

  .detail-pricing-grid {
    grid-template-columns: 1fr;
  }

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

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

@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  .nav-menu {
    display: none;
  }

  .nav-actions {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: calc(var(--nav-height) + 48px) 0 60px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .section {
    padding: 56px 0;
  }

  .section-title {
    font-size: 26px;
  }

  .section-desc {
    font-size: 15px;
  }

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

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

  .products-row {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin: 0 auto;
  }

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

  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact-form-card {
    padding: 24px;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

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

  .page-header-title {
    font-size: 28px;
  }

  .page-header-desc {
    font-size: 15px;
  }

  .protocol-container {
    padding: 28px 24px;
  }

  .protocol-title {
    font-size: 24px;
  }

  .product-detail-card {
    padding: 24px;
  }

  .product-detail-title h2 {
    font-size: 24px;
  }

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

  .stat-number {
    font-size: 32px;
  }

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

  .cta-banner h2 {
    font-size: 24px;
  }

  .cta-banner p {
    font-size: 15px;
  }

  .hero-float-card {
    display: none;
  }

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

  .security-levels {
    grid-template-columns: 1fr !important;
  }

  .security-card {
    transform: none !important;
  }

  /* 产品页保密级服务移动端适配 */
  #security table {
    font-size: 12px;
    display: block;
    overflow-x: auto;
  }

  #security table th,
  #security table td {
    padding: 10px 8px !important;
  }

  #security .detail-section-content > div[style*="grid-template-columns: repeat(4"] {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  #security .detail-section-content > div[style*="grid-template-columns: repeat(3"] {
    grid-template-columns: 1fr !important;
  }
}

/* ---------- Utility Classes ---------- */
.text-center {
  text-align: center;
}

.text-primary {
  color: var(--color-primary);
}

.text-secondary {
  color: var(--color-secondary);
}

.mt-0 { margin-top: 0; }
.mt-4 { margin-top: 4px; }
.mt-8 { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }

.hidden {
  display: none !important;
}

/* ---------- Animations ---------- */
.fade-in {
  animation: fadeIn 0.6s ease-out;
}

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

/* ---------- News Page ---------- */
.news-list {
  max-width: 800px;
  margin: 0 auto;
}

.news-item {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}

.news-item:last-child {
  border-bottom: none;
}

.news-date {
  flex-shrink: 0;
  width: 100px;
  font-size: 14px;
  color: var(--color-text-tertiary);
  font-weight: 600;
  padding-top: 2px;
}

.news-content {
  flex: 1;
}

.news-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.news-excerpt {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .news-item {
    flex-direction: column;
    gap: 8px;
  }

  .news-date {
    width: auto;
  }
}

/* ---------- News Article ---------- */
.news-item-link {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: opacity var(--transition-fast);
}

.news-item-link:hover .news-item {
  background-color: var(--color-bg-gray);
}

.news-item-link:hover .news-title {
  color: var(--color-primary);
}

.news-article {
  max-width: 800px;
  margin: 0 auto;
}

.news-article-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.news-article-tag {
  display: inline-block;
  padding: 4px 12px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.news-article-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: 12px;
}

.news-article-meta {
  font-size: 14px;
  color: var(--color-text-tertiary);
}

.news-article-body {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.news-article-body h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin: 36px 0 16px;
}

.news-article-body p {
  margin-bottom: 16px;
}

.news-point {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
}

.news-point-num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background-color: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

.news-point-text {
  flex: 1;
  padding-top: 3px;
}

.news-point-text p {
  margin-bottom: 0;
}

.news-check-list {
  margin: 20px 0;
}

.news-check-item {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  line-height: 1.7;
}

.news-check-item::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-secondary);
  font-weight: 700;
}

.news-tip {
  background-color: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
}

.news-tip p {
  margin-bottom: 8px;
}

.news-tip p:last-child {
  margin-bottom: 0;
}

.news-article-footer {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

@media (max-width: 768px) {
  .news-article-title {
    font-size: 22px;
  }

  .news-article-body {
    font-size: 15px;
  }

  .news-article-body h2 {
    font-size: 19px;
  }
}