/* TokenProto 产品首屏 - 浅蓝浅紫渐变、现代科技风 */

* {
  box-sizing: border-box;
}

/* 覆盖浏览器默认 body margin，避免出现 8px 白边 */
body {
  margin: 0;
}

.landing-wrap {
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #1a1a1a;
  background: #fafafa;
}

/* ========== Header ========== */
.landing-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  padding: 16px 24px;
  box-shadow: 0 1px 0 rgba(0,0,0,0.06);
}

.landing-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.landing-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #1a1a1a;
  font-weight: 600;
  font-size: 18px;
}

.landing-logo:hover {
  color: #1a1a1a;
}

.landing-logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #1a1a1a;
  flex-shrink: 0;
}

/* Header / Footer 共用：仅限制高度，宽度随比例 */
.landing-logo-img {
  height: 24px;
  width: auto;
  max-width: none;
  display: block;
  object-fit: contain;
}

.landing-logo-icon svg {
  width: 100%;
  height: 100%;
}

.landing-logo-text {
  letter-spacing: -0.02em;
}

.landing-nav {
  display: flex;
  align-items: center;
  gap: 40px;
  flex: 1;
  justify-content: center;
}

/* 顶栏菜单文字（不含下拉面板内链）：常驻 active 同款字重与颜色，下划线仅在 hover / .active */
.landing-nav-link {
  color: #1a1a1a;
  font-weight: 500;
  text-decoration: none;
  font-size: 18px;
  padding-bottom: 5px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s;
}

.landing-nav-link:hover {
  border-bottom-color: #1a1a1a;
}

.landing-nav-link.active {
  border-bottom-color: #1a1a1a;
}

.landing-nav-link.has-dropdown {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.landing-nav-arrow {
  font-size: 10px;
  opacity: 0.8;
  transition: transform 0.15s ease;
}

/* ========== Top Nav Dropdown ========== */
.landing-nav-item {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.landing-nav-dropdown {
  position: absolute;
  left: 50%;
  top: calc(100% + 14px);
  background: #ffffff;
  border-radius: 14px;
  box-shadow: 0 26px 70px rgba(17, 24, 39, 0.12);
  padding: 18px 16px;
  z-index: 300;

  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-6px);
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s ease;
  pointer-events: auto;
}

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

/* When moving from trigger to dropdown, keep it open while user hovers dropdown */
.landing-nav-dropdown:hover {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.landing-nav-item.has-dropdown:hover .landing-nav-arrow {
  transform: rotate(180deg);
}

.landing-nav-dropdown-1col {
  min-width: 280px;
}

.landing-nav-dropdown-2col {
  min-width: 560px;
  padding: 18px 22px;
}

/* Resources 两列：8 项等宽等高（按列优先填充） */
.landing-nav-dropdown-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: repeat(4, minmax(96px, 1fr));
  grid-auto-flow: column;
  column-gap: 18px;
  row-gap: 18px;
  align-items: stretch;
}

.landing-nav-dropdown-grid--service {
  grid-template-columns: 1fr;
  grid-template-rows: repeat(6, minmax(82px, 1fr));
  row-gap: 12px;
}

.landing-nav-dropdown-grid--service .landing-dropdown-item {
  min-height: 82px;
}

.landing-nav-dropdown-grid .landing-nav-dropdown-col {
  display: contents;
}

.landing-nav-dropdown-grid .landing-dropdown-item {
  height: 100%;
  min-height: 96px;
  box-sizing: border-box;
}

.landing-nav-dropdown-grid .landing-dropdown-title {
  white-space: normal;
}

.landing-nav-dropdown-col {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.landing-dropdown-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px;
  border-radius: 12px;
  text-decoration: none;
  color: #0f172a;
  transition: background 0.15s ease;
}

.landing-dropdown-item:hover {
  background: rgba(99, 102, 241, 0.08);
}

.landing-dropdown-icon {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #eef2ff;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #1f2a44;
  font-weight: 700;
  font-size: 14px;
}

.landing-dropdown-icon img {
  width: 22px;
  height: 22px;
  object-fit: contain;
  display: block;
}

.landing-dropdown-text {
  display: flex;
  flex-direction: column;
}

.landing-dropdown-title {
  font-weight: 700;
  font-size: 16px;
  line-height: 1.2;
  color: #0f172a;
  white-space: nowrap;
}

.landing-dropdown-subtitle {
  margin-top: 4px;
  font-size: 13px;
  font-weight: 500;
  color: #7b86a5;
  line-height: 1.25;
}

.landing-header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.landing-lang-switch {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  border: 1px solid rgba(99, 102, 241, 0.35);
  background: linear-gradient(180deg, #ffffff 0%, #f4f7ff 100%);
  color: #1f2a44;
  border-radius: 999px;
  height: 36px;
  padding: 0 34px 0 14px;
  font-size: 13px;
  font-weight: 600;
  line-height: 36px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.14);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
  background-image:
      linear-gradient(45deg, transparent 50%, #6366f1 50%),
      linear-gradient(135deg, #6366f1 50%, transparent 50%);
  background-position:
      calc(100% - 16px) 15px,
      calc(100% - 11px) 15px;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}

.landing-lang-switch:hover {
  border-color: rgba(99, 102, 241, 0.65);
  box-shadow: 0 10px 24px rgba(99, 102, 241, 0.2);
}

.landing-lang-switch:focus {
  outline: none;
  border-color: #6366f1;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.22);
}

.landing-lang-switch:active {
  transform: translateY(1px);
}

.landing-icon {
  width: 18px;
  height: 18px;
  vertical-align: middle;
  margin-right: 6px;
}

.landing-lang {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  color: #4a4a4a;
}

.landing-sep {
  color: #ccc;
  font-size: 14px;
}

.landing-login-link {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  color: #4a4a4a;
  text-decoration: none;
}

.landing-login-link:hover {
  color: #1a1a1a;
}

.landing-cta-header {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: #1a1a2e;
  color: #fff;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  transition: background 0.2s;
}

.landing-cta-header:hover {
  background: #16213e;
  color: #fff;
}

.landing-cta-arrow {
  width: 16px;
  height: 16px;
}

/* ========== Hero ========== */
.landing-hero {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 24px 80px;
  min-height: calc(100vh - 70px);
  background: linear-gradient(160deg, #e8f0fe 0%, #f3e8fd 50%, #e8f4fc 100%);
}

.landing-hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.landing-blur-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.5;
}

.landing-blur-1 {
  width: 400px;
  height: 400px;
  background: rgba(200, 220, 255, 0.7);
  top: -100px;
  right: 10%;
}

.landing-blur-2 {
  width: 300px;
  height: 300px;
  background: rgba(220, 200, 255, 0.6);
  bottom: 10%;
  left: 5%;
}

.landing-blur-3 {
  width: 250px;
  height: 250px;
  background: rgba(180, 230, 255, 0.5);
  top: 40%;
  left: 20%;
}

.landing-blur-4 {
  width: 200px;
  height: 200px;
  background: rgba(230, 210, 255, 0.5);
  top: 20%;
  right: 25%;
}

.landing-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 900px;
  width: 100%;
  text-align: left;
}

.landing-hero-badge {
  display: inline-block;
  padding: 10px 20px;
  background: linear-gradient(135deg, #7c3aed 0%, #6d28d9 100%);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.35);
  margin-bottom: 24px;
}

.landing-hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.2;
  color: #1a1a1a;
  margin: 0 0 20px 0;
  letter-spacing: -0.03em;
}

.landing-hero-sub {
  font-size: 18px;
  color: #333;
  margin: 0 0 32px 0;
  line-height: 1.5;
}

.landing-hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
}

.landing-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 10px;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  cursor: pointer;
  border: 1px solid #333;
  color: #333;
  background: #fff;
  position: relative;
  overflow: hidden;
}

.landing-btn:hover {
  background: #f5f5f5;
  border-color: #1a1a1a;
  color: #1a1a1a;
}

.landing-btn-arrow {
  width: 18px;
  height: 18px;
}

.landing-btn-outline {
  min-width: 160px;
  --landing-btn-dark: #090f1d;
  border-color: var(--landing-btn-dark) !important;
  color: var(--landing-btn-dark) !important;
  background: #fff !important;
}

.landing-btn-large {
  display: inline-flex;
  width: 100%;
  max-width: 420px;
  padding: 16px 32px;
  font-size: 16px;
  margin-bottom: 24px;
}

.landing-hero-footer-url {
  font-size: 12px;
  color: #888;
  margin: 0;
}

/* Light (浅色) button: border/text dark, hover to dark background + gradient animation */
.landing-btn-outline::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(120deg, #090f1d 0%, #16213e 45%, #090f1d 100%);
  background-size: 250% 250%;
  opacity: 0;
  transform: translateX(-15%);
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.landing-btn-outline:hover {
  background: #090f1d !important;
  border-color: #090f1d !important;
  color: #ffffff !important;
}

.landing-btn-outline:hover::before {
  opacity: 1;
  transform: translateX(0);
  animation: landingBtnGradientIn 0.65s ease both;
}

/* Dark (深色) button */
.landing-btn-dark {
  --landing-btn-dark: #090f1d;
  background: #090f1d !important;
  border-color: #090f1d !important;
  color: #fff !important;
}

.landing-btn-dark:hover {
  background: #ffffff !important;
  border-color: #090f1d !important;
  color: #090f1d !important;
}

/* CTA spacing below hero copy (service pages) */
.landing-btn--mt {
  margin-top: 1.25rem;
}

@keyframes landingBtnGradientIn {
  0% {
    opacity: 0;
    background-position: 0% 50%;
    transform: translateX(-15%);
  }
  100% {
    opacity: 1;
    background-position: 100% 50%;
    transform: translateX(0);
  }
}

/* Hero area dynamic background + larger typography */
.landing-hero {
  overflow: hidden;
}

.landing-hero::before {
  content: '';
  position: absolute;
  /* 略大于视区，平移时色带变化更明显 */
  width: 135%;
  height: 135%;
  left: -17.5%;
  top: -17.5%;
  background:
      radial-gradient(720px circle at 22% 32%, rgba(124, 58, 237, 0.38) 0%, rgba(124, 58, 237, 0.0) 58%),
      radial-gradient(580px circle at 72% 20%, rgba(37, 99, 235, 0.30) 0%, rgba(37, 99, 235, 0.0) 60%),
      radial-gradient(600px circle at 78% 72%, rgba(34, 211, 238, 0.26) 0%, rgba(34, 211, 238, 0.0) 58%),
      radial-gradient(620px circle at 28% 80%, rgba(167, 139, 250, 0.24) 0%, rgba(167, 139, 250, 0.0) 62%);
  filter: blur(52px);
  opacity: 0.9;
  animation: landingHeroGradientFlow 12s cubic-bezier(0.42, 0, 0.58, 1) infinite;
  will-change: transform;
  z-index: 0;
  pointer-events: none;
}

.landing-hero-bg {
  z-index: 1;
}

.landing-hero-inner {
  z-index: 2;
}

/* Hero / 腰封共用：位移与缩放更激进，周期更短，流动感更强 */
@keyframes landingHeroGradientFlow {
  0% {
    transform: translate3d(0%, 0%, 0) scale(1);
  }
  16% {
    transform: translate3d(9%, -7%, 0) scale(1.12);
  }
  33% {
    transform: translate3d(-8%, 8%, 0) scale(1.06);
  }
  50% {
    transform: translate3d(10%, 5%, 0) scale(1.18);
  }
  66% {
    transform: translate3d(-9%, -6%, 0) scale(1.1);
  }
  83% {
    transform: translate3d(6%, 7%, 0) scale(1.04);
  }
  100% {
    transform: translate3d(0%, 0%, 0) scale(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .landing-hero::before,
  .landing-banner-cta::before {
    animation: none;
    transform: none;
    will-change: auto;
  }
}

.landing-hero .landing-hero-badge {
  font-size: 15px;
  padding: 12px 24px;
  margin-bottom: 28px;
}

.landing-hero .landing-hero-title {
  font-size: clamp(2.25rem, 5.6vw, 3.7rem);
  margin-bottom: 22px;
}

.landing-hero .landing-hero-sub {
  font-size: 20px;
  margin-bottom: 36px;
}

.landing-hero .landing-hero-footer-url {
  font-size: 13px;
}

.landing-hero .landing-hero-buttons {
  gap: 20px;
  margin-bottom: 28px;
}

.landing-hero .landing-btn {
  padding: 16px 34px;
  font-size: 16px;
  border-radius: 12px;
}

.landing-hero .landing-btn-arrow {
  width: 20px;
  height: 20px;
}

/* 响应式 */
@media (max-width: 768px) {
  .landing-header-inner {
    flex-wrap: wrap;
  }

  .landing-nav {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    gap: 24px;
  }

  .landing-hero-buttons {
    flex-direction: column;
  }

  .landing-btn-outline {
    width: 100%;
    max-width: 320px;
  }
}

/* ========== Sections common ========== */
.landing-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px;
}

.landing-section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin: 0 0 32px 0;
  color: #1a1a1a;
}

.landing-tag {
  display: inline-block;
  padding: 6px 14px;
  background: #e8ecf1;
  color: #4a4a4a;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  border-radius: 20px;
  margin-bottom: 16px;
}

.landing-tag-blue {
  background: #e0e7ff;
  color: #4338ca;
}

.landing-gradient-text {
  background: linear-gradient(135deg, #6366f1 0%, #7c3aed 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.landing-btn-primary {
  background: #2563eb !important;
  border-color: #2563eb !important;
  color: #fff !important;
}

.landing-btn-primary:hover {
  background: #1d4ed8 !important;
  border-color: #1d4ed8 !important;
  color: #fff !important;
}

/* Note: .landing-btn-dark is defined earlier (solid + hover invert) */

/* ========== Trusted by + Feature cards ========== */
.landing-trusted {
  padding-top: 80px;
  padding-bottom: 80px;
  text-align: center;
}

.landing-trusted-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
  margin-bottom: 48px;
  color: #6b7280;
  font-size: 14px;
  font-weight: 500;
}

.landing-trusted-logo {
  padding: 8px 16px;
  background: #fff;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}

.landing-feature-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 40px;
  text-align: center;
}

.landing-feature-card {
  background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 12px;
  padding: 28px 20px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.landing-feature-card-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  background: #e0e7ff;
  color: #4338ca;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

.landing-feature-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 10px 0;
  color: #1a1a1a;
}

.landing-feature-card-desc {
  font-size: 13px;
  color: #64748b;
  line-height: 1.5;
  margin: 0;
}

/* ========== Platform + cards merged ========== */
.landing-platform-merged {
  padding: 64px 24px;
}

.landing-platform-merged-shell {
  max-width: 1200px;
  margin: 0 auto;
}

.landing-platform-merged-top {
  background: linear-gradient(145deg, #e8f0fe 0%, #f3e8fd 40%, #e8f4fc 100%);
  border-radius: 20px;
  padding: 40px 48px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 32px 48px;
  align-items: center;
}

.landing-platform-merged-intro {
  min-width: 0;
}

.landing-platform-title-merged {
  margin: 0 0 20px 0;
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
  line-height: 1.35;
  color: #090f1d;
}

.landing-platform-list-merged {
  margin: 0;
}

.landing-platform-list-merged li {
  font-size: 15px;
  line-height: 1.55;
}

.landing-platform-merged-stats-wrap {
  min-width: 0;
}

.landing-stats-grid-merged {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.landing-platform-merged-cards {
  margin-top: 24px;
}

.landing-two-cards-inner-merged {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.landing-chart-line-wrap {
  margin-top: 8px;
  width: 100%;
  text-align: center;
}

.landing-chart-line-img {
  display: block;
  max-width: 100%;
  width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: 12px;
}

/* ========== Platform stats card (legacy, kept for reference) ========== */
.landing-platform-card {
  padding: 64px 24px;
}

.landing-platform-inner {
  background: linear-gradient(145deg, #e8f0fe 0%, #f3e8fd 40%, #e8f4fc 100%);
  border-radius: 20px;
  padding: 48px 56px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.landing-platform-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 16px 0;
  color: #1a1a1a;
  line-height: 1.3;
}

.landing-platform-title-break {
  display: block;
  font-size: 1.5rem;
}

.landing-platform-desc {
  font-size: 15px;
  color: #475569;
  margin: 0 0 24px 0;
  line-height: 1.6;
}

.landing-platform-list {
  list-style: none;
  padding: 0;
  margin: 0 0 32px 0;
}

.landing-platform-list li {
  margin-bottom: 10px;
  font-size: 14px;
  color: #334155;
}

.landing-check {
  color: #2563eb;
  margin-right: 8px;
  font-weight: 700;
}

.landing-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.landing-stat {
  background: rgba(255,255,255,0.8);
  border: 1px solid rgba(255,255,255,0.9);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.landing-stat-num {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: #2563eb;
  margin-bottom: 4px;
}

.landing-platform-merged .landing-stat-num {
  color: #090f1d;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.landing-stat-label {
  font-size: 13px;
  color: #64748b;
}

/* ========== Two cards (Integration + Scalability) ========== */
.landing-two-cards {
  padding: 64px 24px;
}

.landing-two-cards-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.landing-integration-card {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.04);
  text-align: center;
}

.landing-integration-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  background: #e0e7ff;
  color: #4338ca;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.landing-integration-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 12px 0;
  color: #1a1a1a;
}

.landing-integration-desc {
  font-size: 14px;
  color: #64748b;
  margin: 0 0 20px 0;
  line-height: 1.5;
}

.landing-code-block {
  text-align: left;
  background: #1e293b;
  color: #e2e8f0;
  padding: 20px;
  border-radius: 10px;
  font-size: 12px;
  line-height: 1.6;
  overflow-x: auto;
  margin: 0;
  font-family: ui-monospace, monospace;
}

.landing-chart-placeholder {
  height: 180px;
  background: linear-gradient(145deg, #e0e7ff 0%, #f3e8fd 100%);
  border-radius: 10px;
  position: relative;
}

.landing-chart-placeholder::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 20px;
  height: 60%;
  background: linear-gradient(90deg, transparent 0%, rgba(99,102,241,0.3) 50%, transparent 100%);
  border-radius: 4px;
}

/* ========== Model list ========== */
.landing-models {
  background: #fff;
  padding: 64px 24px;
}

.landing-models-head,
.landing-steps-head {
  text-align: center;
  margin-bottom: 0;
}

.landing-models-head .landing-tag,
.landing-steps-head .landing-tag {
  margin: 0 auto 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.landing-tag-outline {
  background: transparent !important;
  border: 1px solid #2563eb;
  color: #2563eb !important;
  letter-spacing: 0.08em;
}

.landing-tag-outline-blue {
  border-color: #3b82f6;
  color: #2563eb !important;
}

.landing-models-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin: 0 0 24px 0;
  color: #1a1a1a;
}

.landing-models-title-centered {
  text-align: center;
  margin: 0 auto 32px;
  max-width: 900px;
  line-height: 1.25;
}

.landing-search-wrap {
  position: relative;
  max-width: 480px;
  margin-bottom: 24px;
}

.landing-search-wrap-wide {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 28px;
}

.landing-search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: #94a3b8;
}

.landing-search-input {
  width: 100%;
  padding: 14px 16px 14px 48px;
  font-size: 15px;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  outline: none;
}

.landing-search-input::placeholder {
  color: #94a3b8;
}

.landing-filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.landing-models .landing-filter-chips {
  justify-content: center;
}

.landing-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 14px;
  border: 1px solid #e5e7eb;
  background: #f3f4f6;
  border-radius: 999px;
  color: #374151;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.landing-chip-icon {
  font-size: 14px;
  line-height: 1;
  opacity: 0.85;
}

.landing-chip:hover {
  background: #e5e7eb;
  border-color: #d1d5db;
}

.landing-chip.active {
  background: #090f1d;
  border-color: #090f1d;
  color: #fff;
}

.landing-chip.active .landing-chip-icon {
  opacity: 1;
}

.landing-model-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.landing-model-card {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  padding: 20px 20px 16px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.04);
  transition: box-shadow 0.2s, border-color 0.2s;
}

.landing-model-card:hover {
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  border-color: #e2e8f0;
}

.landing-model-card-top {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}

.landing-model-logo {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #f1f5f9;
  color: #0f172a;
  font-size: 18px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.landing-model-logo img {
  width: 24px;
  height: 24px;
  object-fit: contain;
  display: block;
}

.landing-model-card-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
}

.landing-model-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.landing-model-tag {
  display: inline-block;
  padding: 5px 10px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #3730a3;
  background: #e0e7ff;
  border-radius: 999px;
  line-height: 1.2;
}

.landing-model-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  background: #f1f5f9;
  color: #475569;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}

.landing-model-info {
  flex: 1;
  min-width: 0;
}

.landing-model-name {
  display: block;
  font-weight: 600;
  color: #1a1a1a;
  margin-bottom: 4px;
}

.landing-model-type {
  font-size: 12px;
  color: #94a3b8;
}

.landing-model-arrow {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 50%;
  background: #090f1d;
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.2s;
}

.landing-model-arrow:hover {
  background: #16213e;
  transform: scale(1.05);
}

.landing-models-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ========== Steps ========== */
.landing-steps {
  padding: 64px 24px;
}

.landing-steps-hero {
  background: #fff;
}

.landing-steps-head .landing-steps-title {
  margin: 0;
}

.landing-steps-title {
  font-size: clamp(1.35rem, 2.8vw, 1.85rem);
  font-weight: 700;
  margin: 0 0 40px 0;
  text-align: center;
  color: #090f1d;
}

.landing-steps-row {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 48px;
}

.landing-step-card {
  flex: 1;
  min-width: 240px;
  max-width: 300px;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.landing-step-badge {
  display: inline-block;
  padding: 8px 12px;
  background: linear-gradient(135deg, #6366f1 0%, #7c3aed 100%);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: 4px;
  margin-bottom: 18px;
}

.landing-step-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 10px 0;
  color: #1a1a1a;
}

.landing-step-desc {
  font-size: 14px;
  color: #64748b;
  margin: 0 0 24px 0;
  line-height: 1.55;
}

.landing-btn-step {
  width: 100%;
  max-width: 200px;
  padding: 12px 22px;
  font-size: 14px;
  border-radius: 10px;
  margin-top: auto;
}

.landing-step-arrow {
  align-self: center;
  font-size: 22px;
  color: #090f1d;
  font-weight: 600;
  user-select: none;
}

/* ========== AI Playground ========== */
.landing-playground {
  padding: 64px 24px;
}

.landing-playground-card {
  background: #fff;
  border-radius: 20px;
  padding: 40px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}

.landing-playground-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.landing-playground-icon {
  width: 32px;
  height: 32px;
  border: 2px solid #6366f1;
  color: #6366f1;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.landing-playground-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  color: #1a1a1a;
}

.landing-playground-desc {
  font-size: 14px;
  color: #64748b;
  margin: 0 0 8px 0;
  line-height: 1.5;
}

.landing-playground-tabs {
  display: flex;
  gap: 8px;
  margin: 24px 0;
}

.landing-tab {
  padding: 10px 20px;
  font-size: 14px;
  border: none;
  border-radius: 8px;
  background: #f1f5f9;
  color: #64748b;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.landing-tab:hover {
  background: #e2e8f0;
  color: #334155;
}

.landing-tab.active {
  background: #1a1a2e;
  color: #fff;
}

.landing-playground-body {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 32px;
  margin-top: 24px;
}

.landing-playground-left {
  min-width: 0;
}

.landing-playground-sub {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 8px 0;
  color: #1a1a1a;
}

.landing-playground-hint {
  font-size: 13px;
  color: #94a3b8;
  margin: 0 0 20px 0;
}

.landing-chat-row {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.landing-chat-avatar {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  background: #7c3aed;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

.landing-chat-avatar-ai {
  background: #475569;
}

.landing-chat-bubble {
  flex: 1;
  padding: 14px 18px;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  font-size: 14px;
  color: #334155;
  line-height: 1.5;
}

.landing-chat-bubble-ai {
  background: #f8fafc;
  border-color: #e2e8f0;
}

.landing-playground-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.landing-playground-field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #475569;
  margin-bottom: 6px;
}

.landing-select-wrap select,
.landing-input {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  outline: none;
}

.landing-params {
  font-size: 13px;
  color: #94a3b8;
  padding: 10px 0;
}

/* ========== FAQ ========== */
.landing-faq {
  padding: 64px 24px;
  margin-bottom: 64px;
  background: #fff;
}

.landing-faq-inner {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 64px;
  align-items: start;
  max-width: 1000px;
  margin: 0 auto;
}

.landing-faq-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 16px 0;
  color: #1a1a1a;
  line-height: 1.3;
}

.landing-faq-desc {
  font-size: 14px;
  color: #64748b;
  line-height: 1.6;
  margin: 0;
}

.landing-faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.landing-faq-item {
  background: #f8fafc;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #e2e8f0;
}

.landing-faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 500;
  color: #1a1a1a;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: background 0.2s;
}

.landing-faq-q:hover {
  background: #f1f5f9;
}

.landing-faq-arrow {
  flex-shrink: 0;
  margin-left: 12px;
  color: #94a3b8;
  transition: transform 0.2s;
}

.landing-faq-item.open .landing-faq-arrow {
  transform: rotate(180deg);
}

.landing-faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.landing-faq-item.open .landing-faq-a {
  border-top: 1px solid #e2e8f0;
}

.landing-faq-a p {
  margin: 0;
  padding: 20px 20px 18px 20px;
  font-size: 14px;
  color: #64748b;
  line-height: 1.6;
}

/* ========== Footer CTA banner（腰封：大面积 + 流动渐变 + 居中文案 + 大按钮） ========== */
.landing-banner-cta {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: clamp(72px, 12vw, 120px) 24px clamp(88px, 14vw, 140px);
  background: linear-gradient(160deg, #e8f0fe 0%, #f3e8fd 50%, #e8f4fc 100%);
}

.landing-banner-cta::before {
  content: '';
  position: absolute;
  width: 135%;
  height: 135%;
  left: -17.5%;
  top: -17.5%;
  background:
      radial-gradient(720px circle at 22% 32%, rgba(124, 58, 237, 0.38) 0%, rgba(124, 58, 237, 0.0) 58%),
      radial-gradient(580px circle at 72% 20%, rgba(37, 99, 235, 0.30) 0%, rgba(37, 99, 235, 0.0) 60%),
      radial-gradient(600px circle at 78% 72%, rgba(34, 211, 238, 0.26) 0%, rgba(34, 211, 238, 0.0) 58%),
      radial-gradient(620px circle at 28% 80%, rgba(167, 139, 250, 0.24) 0%, rgba(167, 139, 250, 0.0) 62%);
  filter: blur(52px);
  opacity: 0.9;
  animation: landingHeroGradientFlow 12s cubic-bezier(0.42, 0, 0.58, 1) infinite;
  animation-delay: -4s;
  will-change: transform;
  z-index: 0;
  pointer-events: none;
}

.landing-banner-cta-inner {
  position: relative;
  z-index: 1;
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.landing-banner-cta-title {
  margin: 0 0 16px 0;
  font-size: clamp(1.65rem, 4.2vw, 2.65rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: #090f1d;
}

.landing-banner-cta-sub {
  margin: 0 0 36px 0;
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 500;
  color: #475569;
  line-height: 1.5;
}

.landing-banner-cta-btn {
  padding: 18px 36px;
  font-size: clamp(15px, 1.8vw, 18px);
  font-weight: 600;
  border-radius: 14px;
  gap: 14px;
  min-height: 56px;
}

.landing-banner-cta-btn-label,
.landing-banner-cta-btn-icon {
  position: relative;
  z-index: 1;
}

.landing-banner-cta-btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
}

.landing-banner-cta-btn-icon svg {
  display: block;
}

.landing-banner-cta-btn.landing-btn-dark:hover .landing-banner-cta-btn-icon {
  background: rgba(9, 15, 29, 0.08);
  color: #090f1d;
}

/* ========== Footer ========== */
.landing-footer {
  background: #f7f8fb;
  border-top: 1px solid #e8eaef;
}

.landing-footer-top {
  max-width: 1240px;
  margin: 0 auto;
  padding: 56px 32px 48px;
  display: grid;
  grid-template-columns: minmax(260px, 300px) 1fr;
  gap: 56px 72px;
  align-items: start;
}

.landing-footer-disclaimer {
  font-size: 13px;
  color: #64748b;
  line-height: 1.6;
  margin: 16px 0 0 0;
}

.landing-footer-disclaimer a {
  color: #2563eb;
  text-decoration: none;
}

.landing-footer-disclaimer a:hover {
  text-decoration: underline;
}

.landing-footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px 48px;
}

.landing-footer-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.landing-footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  margin: 0;
  color: #090f1d;
  letter-spacing: -0.01em;
}

.landing-footer-col a:not(.landing-footer-email):not(.landing-footer-social-btn) {
  display: block;
  font-size: 15px;
  color: #64748b;
  text-decoration: none;
  line-height: 1.45;
}

.landing-footer-col a:not(.landing-footer-email):not(.landing-footer-social-btn):hover {
  color: #2563eb;
}

.landing-footer-email {
  display: inline-block;
  font-size: 16px;
  font-weight: 600;
  color: #090f1d;
  text-decoration: none;
  line-height: 1.4;
}

.landing-footer-email:hover {
  color: #2563eb;
}

.landing-footer-col-contact {
  gap: 18px;
}

.landing-footer-social {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.landing-footer-social-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: #e8eaef;
  color: #64748b;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.landing-footer-social-btn:hover {
  background: #dce0e8;
  color: #090f1d;
}

.landing-footer-bottom {
  background: #000;
  color: #fff;
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.landing-footer-bottom span {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.92);
}

.landing-footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
}

.landing-footer-legal a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
}

.landing-footer-legal a:hover {
  color: #fff;
}

/* ========== Back to top ========== */
.landing-back-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #2563eb;
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(37,99,235,0.4);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
  z-index: 99;
}

.landing-back-top.visible {
  opacity: 1;
  visibility: visible;
}

/* Responsive additions */
@media (max-width: 900px) {
  .landing-feature-cards { grid-template-columns: repeat(2, 1fr); }
  .landing-platform-inner { grid-template-columns: 1fr; }
  .landing-platform-merged-top { grid-template-columns: 1fr; padding: 32px 24px; }
  .landing-two-cards-inner { grid-template-columns: 1fr; }
  .landing-model-grid { grid-template-columns: repeat(2, 1fr); }
  .landing-playground-body { grid-template-columns: 1fr; }
  .landing-faq-inner { grid-template-columns: 1fr; }
  .landing-footer-top { grid-template-columns: 1fr; }
  .landing-footer-links { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .landing-feature-cards { grid-template-columns: 1fr; }
  .landing-model-grid { grid-template-columns: 1fr; }
  .landing-steps-row { flex-direction: column; align-items: center; }
  .landing-step-arrow { display: none; }
  .landing-footer-links { grid-template-columns: 1fr; }
}

/* ========== OpenAI gallery subpage (/model/openai) ========== */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.landing-wrap--openai,
.landing-wrap--google,
.landing-wrap--anthropic,
.landing-wrap--xai,
.landing-wrap--deepseek,
.landing-wrap--alibaba,
.landing-wrap--bytedance,
.landing-wrap--pricing {
  background: linear-gradient(165deg, #e8f4fc 0%, #f0f4ff 38%, #faf5ff 72%, #ffffff 100%);
}

.model-openai-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 24px 56px;
}

.model-openai-breadcrumb {
  font-size: 13px;
  color: #94a3b8;
  margin: 0 0 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.model-openai-breadcrumb a {
  color: #64748b;
  text-decoration: none;
}

.model-openai-breadcrumb a:hover {
  color: #2563eb;
  text-decoration: underline;
}

.model-openai-bc-sep {
  color: #cbd5e1;
  user-select: none;
}

.model-openai-bc-current {
  color: #475569;
  font-weight: 500;
}

.model-openai-page-title {
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #090f1d;
  margin: 0 0 24px;
}

.model-openai-intro-card {
  background: #ffffff;
  border-radius: 28px;
  padding: 28px 32px;
  box-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
  border: 1px solid rgba(226, 232, 240, 0.9);
  margin-bottom: 28px;
}

.model-openai-intro-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: #475569;
  text-align: center;
}

.model-openai-featured {
  margin-bottom: 40px;
}

.model-openai-featured-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: stretch;
  background: #ffffff;
  border-radius: 28px;
  padding: 36px 40px;
  box-shadow: 0 8px 32px rgba(15, 23, 42, 0.08);
  border: 1px solid rgba(226, 232, 240, 0.95);
}

.model-openai-featured-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  justify-content: center;
}

.model-openai-featured-title {
  font-size: clamp(1.35rem, 2.5vw, 1.65rem);
  font-weight: 800;
  color: #090f1d;
  margin: 0;
  line-height: 1.25;
}

.model-openai-featured-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: #64748b;
}

.model-openai-featured-cta {
  margin-top: 8px;
  padding: 14px 28px;
  border-radius: 12px;
}

.model-openai-featured-preview-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
}

.model-openai-preview-card {
  width: 100%;
  max-width: 380px;
  background: #fafbfc;
  border-radius: 20px;
  padding: 24px;
  border: 1px solid #e8ecf4;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}

.model-openai-preview-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid #e8ecf4;
}

.model-openai-preview-logo {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid #e5e7eb;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #090f1d;
}

.model-openai-preview-logo img {
  width: 30px;
  height: 30px;
  object-fit: contain;
  display: block;
}

.model-openai-brand-svg {
  display: block;
}

.model-openai-preview-titles {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.model-openai-preview-name {
  font-size: 17px;
  font-weight: 700;
  color: #090f1d;
}

.model-openai-preview-sub {
  font-size: 13px;
  color: #94a3b8;
}

.model-openai-preview-meta {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.model-openai-preview-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 12px;
  align-items: center;
}

.model-openai-preview-row dt {
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.model-openai-preview-row dd {
  margin: 0;
}

.model-openai-pill {
  display: inline-block;
  padding: 6px 12px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #1e3a5f;
  background: linear-gradient(180deg, #dbeafe 0%, #e0e7ff 100%);
  border-radius: 999px;
  border: 1px solid rgba(147, 197, 253, 0.5);
}

.model-openai-preview-blank {
  color: #cbd5e1;
  font-size: 15px;
}

.model-openai-models {
  background: transparent;
  padding-left: 0;
  padding-right: 0;
}

.model-openai-models .landing-models-head .landing-tag {
  margin-bottom: 12px;
}

.model-openai-list-note {
  text-align: center;
  font-size: 14px;
  color: #64748b;
  margin: 0 0 20px;
}

.landing-model-logo--openai {
  padding: 0;
  background: #fff;
  border: 1px solid #e5e7eb;
  color: #090f1d;
}

.model-openai-brand-svg--sm {
  display: block;
}

.model-openai-preview-logo--letter {
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.model-openai-preview-logo--google { color: #1a73e8; background: #e8f0fe; border: 1px solid #dadce0; }
.model-openai-preview-logo--anthropic { color: #b45309; background: #fffbeb; border: 1px solid #fde68a; }
.model-openai-preview-logo--xai { color: #0f172a; background: #f1f5f9; border: 1px solid #e2e8f0; }
.model-openai-preview-logo--deepseek { color: #0369a1; background: #e0f2fe; border: 1px solid #bae6fd; }
.model-openai-preview-logo--alibaba { color: #c2410c; background: #fff7ed; border: 1px solid #fed7aa; }
.model-openai-preview-logo--bytedance { color: #1d4ed8; background: #eff6ff; border: 1px solid #bfdbfe; }

.landing-model-logo--google { background: #e8f0fe; color: #1a73e8; border: 1px solid #dadce0; font-weight: 800; font-size: 18px; }
.landing-model-logo--anthropic { background: #fffbeb; color: #b45309; border: 1px solid #fde68a; font-weight: 800; font-size: 18px; }
.landing-model-logo--xai { background: #f1f5f9; color: #0f172a; border: 1px solid #e2e8f0; font-weight: 800; font-size: 18px; }
.landing-model-logo--deepseek { background: #e0f2fe; color: #0369a1; border: 1px solid #bae6fd; font-weight: 800; font-size: 18px; }
.landing-model-logo--alibaba { background: #fff7ed; color: #c2410c; border: 1px solid #fed7aa; font-weight: 800; font-size: 18px; }
.landing-model-logo--bytedance { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; font-weight: 800; font-size: 18px; }

@media (max-width: 900px) {
  .model-openai-featured-inner {
    grid-template-columns: 1fr;
    padding: 28px 24px;
  }
}

/* ========== Pricing page (/pricing) ========== */
.landing-pricing-hero {
  padding: 48px 24px 32px;
  text-align: center;
}

.landing-pricing-hero-inner {
  max-width: 800px;
  margin: 0 auto;
}

.landing-pricing-hero-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #090f1d;
  margin: 0 0 16px;
  line-height: 1.2;
}

.landing-pricing-hero-sub {
  margin: 0 auto 28px;
  font-size: 1.05rem;
  line-height: 1.6;
  color: #64748b;
  max-width: 640px;
}

.landing-pricing-hero-badges {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.landing-pricing-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  color: #334155;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
}

.landing-pricing-hero-badge span:first-child {
  font-size: 16px;
  line-height: 1;
}

.landing-pricing-plans {
  padding: 24px 24px 56px;
  max-width: 1200px;
  margin: 0 auto;
}

.landing-pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  align-items: stretch;
}

.landing-pricing-card {
  position: relative;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 20px;
  padding: 28px 24px 24px;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
  display: flex;
  flex-direction: column;
}

.landing-pricing-card--featured {
  border-color: #6366f1;
  box-shadow: 0 12px 40px rgba(99, 102, 241, 0.15);
  padding-top: 40px;
}

.landing-pricing-card--scale {
  background: linear-gradient(145deg, #0a0a14 0%, #1a0033 100%);
  color: #ffffff;
  border: 1px solid rgba(186, 85, 211, 0.5);
  box-shadow: 0 8px 32px rgba(15, 0, 30, 0.45);
}

.landing-pricing-card--scale .landing-pricing-card-head {
  border-bottom-color: rgba(186, 85, 211, 0.3);
}

.landing-pricing-card--scale .landing-pricing-plan-name {
  color: #ba55d3;
}

.landing-pricing-card--scale .landing-pricing-price {
  color: #ffffff;
}

.landing-pricing-card--scale .landing-pricing-tagline {
  color: rgba(255, 255, 255, 0.75);
}

.landing-pricing-card--scale .landing-pricing-card-body {
  color: rgba(255, 255, 255, 0.92);
}

.landing-pricing-card--scale .landing-pricing-subhead {
  color: rgba(255, 255, 255, 0.55);
}

.landing-pricing-card--scale .landing-pricing-list li {
  color: rgba(255, 255, 255, 0.92);
}

.landing-pricing-card--scale .landing-pricing-discount-block {
  border-top-color: rgba(186, 85, 211, 0.35);
}

.landing-pricing-card--scale .landing-pricing-cta--scale {
  background: linear-gradient(135deg, #ba55d3 0%, #da70d6 100%) !important;
  color: #000000 !important;
  font-weight: 700 !important;
  box-shadow: 0 6px 20px rgba(186, 85, 211, 0.4);
  border: none !important;
  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease, color 0.2s ease;
}

.landing-pricing-card--scale .landing-pricing-cta--scale:hover {
  background: linear-gradient(135deg, #d8b4fe 0%, #e9d5ff 100%) !important;
  box-shadow: 0 8px 30px rgba(186, 85, 211, 0.6);
  transform: translateY(-2px);
  color: #000000 !important;
  border: none !important;
}

.landing-pricing-card--scale .landing-pricing-cta--scale:focus-visible {
  outline: 2px solid #e9d5ff;
  outline-offset: 2px;
}

.landing-pricing-popular {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(135deg, #6366f1 0%, #7c3aed 100%);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 999px;
  white-space: nowrap;
}

.landing-pricing-card-head {
  text-align: center;
  padding-bottom: 20px;
  border-bottom: 1px solid #f1f5f9;
  margin-bottom: 18px;
}

.landing-pricing-plan-name {
  margin: 0 0 8px;
  font-size: 1.35rem;
  font-weight: 800;
  color: #090f1d;
}

.landing-pricing-price {
  margin: 0 0 10px;
  font-size: 2.25rem;
  font-weight: 800;
  color: #090f1d;
  letter-spacing: -0.02em;
}

.landing-pricing-currency {
  font-size: 1.25rem;
  font-weight: 700;
  vertical-align: super;
  margin-right: 2px;
}

.landing-pricing-tagline {
  margin: 0 0 18px;
  font-size: 14px;
  color: #64748b;
  line-height: 1.45;
  min-height: 2.9em;
}

.landing-pricing-cta {
  width: 100%;
  max-width: 100%;
  justify-content: center;
  padding: 12px 20px;
  font-size: 14px;
  border-radius: 12px;
}

.landing-pricing-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 14px;
  color: #475569;
}

.landing-pricing-subhead {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #64748b;
}

.landing-pricing-list {
  margin: 0;
  padding: 0 0 0 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.landing-pricing-list li {
  padding-left: 0;
  line-height: 1.45;
}

.landing-pricing-list--compact {
  gap: 6px;
  font-size: 13px;
}

.landing-pricing-discount-block {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px dashed #e2e8f0;
}

.landing-pricing-enterprise {
  text-align: center;
  margin: 36px 0 0;
  padding: 0 16px;
}

.landing-pricing-enterprise-link {
  display: inline-block;
  font-size: 16px;
  font-weight: 700;
  color: #2563eb;
  text-decoration: none;
}

.landing-pricing-enterprise-link:hover {
  text-decoration: underline;
}

.landing-pricing-enterprise-hint {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  color: #94a3b8;
}

@media (max-width: 1024px) {
  .landing-pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
}

/* ========== Service pages (/service/*) ========== */
.landing-wrap--service {
  background: radial-gradient(1200px circle at 20% -10%, #dbeafe 0%, transparent 45%),
              radial-gradient(900px circle at 80% 0%, #f5d0fe 0%, transparent 40%),
              #f8fafc;
}

.service-main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 36px 24px 68px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.service-hero {
  border-radius: 24px;
  padding: 44px 40px;
  border: 1px solid #e2e8f0;
  background: #fff;
  box-shadow: 0 10px 32px rgba(15, 23, 42, 0.08);
}

.service-hero--dark {
  background: linear-gradient(150deg, #0b1220 0%, #111827 42%, #312e81 100%);
  color: #fff;
  border-color: rgba(99, 102, 241, 0.35);
}

.service-hero--gradient {
  background: linear-gradient(160deg, #eef2ff 0%, #e0f2fe 55%, #f5f3ff 100%);
}

.service-hero--translator {
  background: linear-gradient(160deg, #fff7ed 0%, #fef3c7 45%, #ffedd5 100%);
}

.service-hero--seo {
  background: linear-gradient(160deg, #ecfeff 0%, #cffafe 45%, #e0f2fe 100%);
}

.service-hero--pr {
  background: linear-gradient(160deg, #f5f3ff 0%, #ede9fe 55%, #ede9fe 100%);
}

.service-hero--scraping {
  background: linear-gradient(160deg, #ecfccb 0%, #d9f99d 45%, #fef9c3 100%);
}

.service-kicker {
  display: inline-block;
  margin-bottom: 10px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.12);
  color: #1d4ed8;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.service-hero--dark .service-kicker {
  background: rgba(196, 181, 253, 0.22);
  color: #ddd6fe;
}

.service-title {
  margin: 0;
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: #0f172a;
}

.service-hero--dark .service-title {
  color: #fff;
}

.service-subtitle {
  margin: 14px 0 0;
  font-size: 1.04rem;
  line-height: 1.7;
  color: #475569;
  max-width: 860px;
}

.service-hero--dark .service-subtitle {
  color: rgba(255, 255, 255, 0.84);
}

.service-hero-actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.service-stat-row {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.service-stat-row span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  font-size: 13px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.07);
  color: #334155;
}

.service-section {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 20px;
  padding: 30px 28px;
}

.service-section--muted {
  background: #f8fafc;
}

.service-section-title {
  margin: 0;
  font-size: clamp(1.3rem, 2.8vw, 1.9rem);
  color: #0f172a;
  letter-spacing: -0.02em;
}

.service-section-lead {
  margin: 12px 0 0;
  color: #475569;
  line-height: 1.7;
}

.service-section-cta {
  margin-top: 18px;
}

.service-card-grid {
  margin-top: 20px;
  display: grid;
  gap: 14px;
}

/* ========== Contact page (/contact) ========== */
.landing-wrap--contact {
  background: linear-gradient(165deg, #e8f4fc 0%, #f0f4ff 38%, #faf5ff 72%, #ffffff 100%);
}

.contact-main {
  padding: 24px 0;
}

.contact-hero {
  position: relative;
  max-width: 1240px;
  margin: 0 auto;
  border-radius: 24px;
  overflow: hidden;
  min-height: 540px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.18);
  background:
    radial-gradient(circle at 18% 24%, rgba(41, 82, 152, 0.42), transparent 48%),
    radial-gradient(circle at 82% 68%, rgba(67, 114, 202, 0.35), transparent 44%),
    linear-gradient(120deg, #031021 0%, #072245 52%, #133f78 100%);
}

.contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 70%, rgba(238, 154, 78, 0.35), transparent 36%),
    linear-gradient(180deg, rgba(2, 14, 33, 0.18), rgba(2, 14, 33, 0.5));
}

.contact-hero-overlay {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(115deg, rgba(255, 176, 110, 0.04) 0 2px, transparent 2px 16px);
  opacity: 0.6;
  pointer-events: none;
}

.contact-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr minmax(360px, 480px);
  gap: 42px;
  align-items: start;
  padding: 72px 72px 64px;
}

.contact-title {
  margin: 0;
  color: #fff;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.contact-email {
  margin-top: 42px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  font-weight: 500;
}

.contact-email:hover {
  color: #dbeafe;
}

.contact-email-icon {
  font-size: 14px;
}

.contact-form-wrap {
  border-radius: 16px;
  padding: 8px 4px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-field {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.contact-field span {
  color: rgba(255, 255, 255, 0.92);
  font-size: 14px;
}

.contact-field em {
  color: #f87171;
  font-style: normal;
}

.contact-field input,
.contact-field textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  background: transparent;
  color: #ffffff;
  padding: 6px 0 10px;
  font-size: 14px;
  outline: none;
}

.contact-field input:focus,
.contact-field textarea:focus {
  border-bottom-color: rgba(129, 140, 248, 0.95);
}

.contact-field textarea {
  resize: vertical;
  min-height: 70px;
}

.contact-form-bottom {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.contact-required {
  margin: 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 13px;
}

.contact-required em {
  color: #f87171;
  font-style: normal;
}

.contact-submit-btn {
  min-width: 160px;
  justify-content: center;
  border-radius: 999px;
  background: linear-gradient(135deg, #2b62ff 0%, #4f7dff 100%);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.24);
}

.contact-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.45);
}

.service-card-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.service-card-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.service-card,
.service-number-card,
.service-chip-card,
.service-feature-item {
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  background: #fff;
  padding: 18px 16px;
}

.service-card h3,
.service-number-card h3,
.service-chip-card h3,
.service-feature-item h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: #0f172a;
}

.service-card p,
.service-number-card p,
.service-chip-card p,
.service-feature-item p {
  margin: 0;
  color: #64748b;
  line-height: 1.55;
  font-size: 14px;
}

.service-card strong {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  color: #1d4ed8;
}

.service-number-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.service-number-card span {
  display: inline-flex;
  width: 30px;
  height: 30px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: #e0e7ff;
  color: #3730a3;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 10px;
}

.service-feature-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.service-chip-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.service-compare-table-wrap {
  margin-top: 18px;
  overflow-x: auto;
}

.service-compare-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  overflow: hidden;
}

.service-compare-table th,
.service-compare-table td {
  padding: 12px 14px;
  border-bottom: 1px solid #e2e8f0;
  text-align: left;
  font-size: 14px;
}

.service-compare-table th {
  background: #f1f5f9;
  color: #0f172a;
  font-weight: 700;
}

.service-bullet-list {
  margin: 18px 0 0;
  padding-left: 20px;
  color: #475569;
  line-height: 1.75;
}

.service-highlight-card {
  margin-top: 18px;
  border-radius: 16px;
  border: 1px solid #c7d2fe;
  background: linear-gradient(145deg, #eef2ff 0%, #f5f3ff 100%);
  padding: 20px;
}

.service-highlight-card h3 {
  margin: 0;
  font-size: 1.2rem;
}

.service-highlight-card p {
  margin: 10px 0 16px;
  color: #475569;
}

.service-price {
  font-size: 1.8rem;
  font-weight: 800;
  color: #312e81;
}

.service-timeline {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.service-timeline-item {
  border: 1px solid #e2e8f0;
  background: #fff;
  border-radius: 14px;
  padding: 16px;
}

.service-timeline-item h3 {
  margin: 0 0 8px;
  font-size: 15px;
}

.service-timeline-item p {
  margin: 0;
  color: #64748b;
  font-size: 14px;
  line-height: 1.5;
}

.service-quote {
  margin: 0 0 18px;
  border-left: 4px solid #6366f1;
  padding: 12px 16px;
  background: #f8fafc;
  color: #334155;
  border-radius: 8px;
}

@media (max-width: 1024px) {
  .contact-hero-inner {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 48px 32px;
  }

  .contact-title {
    max-width: 620px;
  }

  .service-card-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .service-card-grid--3, .service-number-grid, .service-feature-list, .service-chip-grid, .service-timeline { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 700px) {
  .contact-main { padding: 24px 0; }

  .contact-hero {
    border-radius: 16px;
    min-height: auto;
  }

  .contact-hero-inner {
    padding: 34px 18px 26px;
  }

  .contact-email {
    margin-top: 26px;
  }

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

  .contact-submit-btn {
    width: 100%;
  }

  .service-main { padding: 28px 16px 54px; }
  .service-hero { padding: 28px 20px; }
  .service-card-grid--4, .service-card-grid--3, .service-number-grid, .service-feature-list, .service-chip-grid, .service-timeline { grid-template-columns: 1fr; }
}

/* 临时隐藏 fragments/landing.html 中 Services 导航与页脚栏目；重做后删除本规则及 HTML 中的 landing-services-nav-hidden */
.landing-services-nav-hidden {
  display: none !important;
}