/* Memalab - 品牌视觉对齐 Radica AI (www.radicaai.com)：白/浅灰背景、清晰层级、统一 CTA 主色 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  /* 主色 / CTA：Make.com 风格深紫色 */
  --color-primary: #6d00cc;
  --color-primary-hover: #5a00a8;
  --color-primary-light: rgba(109, 0, 204, 0.07);
  --color-primary-rgb: 109, 0, 204;
  /* 渐变（Make 风格：以纯色为主，渐变仅用于装饰） */
  --gradient-primary: #6d00cc;
  --gradient-hero: linear-gradient(135deg, #6d00cc, #9b40e8);
  --gradient-text: linear-gradient(to right, #6d00cc, #9b40e8);
  /* 背景：白与浅灰（Make 风格：干净极简） */
  --color-bg: #ffffff;
  --color-bg-pure: #ffffff;
  --color-bg-alt: #f5f5f5;
  /* 文字：深灰/墨色 */
  --color-text: #1a1a2e;
  --color-text-muted: #6b7280;
  /* 次要 / 边框 */
  --color-secondary: #1a1a2e;
  --color-border: #e5e5e5;
  --color-border-subtle: #ebebeb;
  /* 点缀/强调 */
  --color-gold: #6d00cc;
  --color-gold-hover: #5a00a8;
  --color-accent-violet: #9b40e8;
  /* 页脚深色 */
  --color-footer-bg: #1a1a2e;
  --color-footer-text: #9ca3b0;
  --color-footer-text-bright: #f1f5f9;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.08);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04), 0 12px 40px rgba(0, 0, 0, 0.06);
  --shadow-primary: 0 4px 14px rgba(109, 0, 204, 0.25);
  --shadow-primary-lg: 0 8px 24px rgba(109, 0, 204, 0.3);
  --header-height: 64px;
  --color-cta: var(--color-primary);
  --color-cta-hover: var(--color-primary-hover);
  --container: min(1280px, 100% - 24px);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --letter-tight: -0.02em;
  --letter-wide: 0.02em;
  /* 关于我们页：浅灰点缀 */
  --about-warm: #f5f5f5;
  --about-gold-tint: rgba(109, 0, 204, 0.06);
  --about-gold-border: rgba(109, 0, 204, 0.3);
  --about-shadow-warm: 0 4px 20px rgba(0, 0, 0, 0.05), 0 0 0 1px rgba(109, 0, 204, 0.08);
  --about-trust-bg: #fafafa;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

.container {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: 16px;
  padding-right: 16px;
}

/* Header - Radica 风格：白底 + 毛玻璃 */
.header-single {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
  transition: background 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}
.header-single::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border) 20%, var(--color-border) 80%, transparent);
  opacity: 0.5;
  pointer-events: none;
}

/* 顶栏全宽：Logo 与右侧控件与左右边距留出更多空间 */
.header-single .header-inner.header-full-width {
  width: 100%;
  max-width: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  position: relative;
  padding-left: 32px;
  padding-right: 32px;
  margin-left: 0;
  margin-right: 0;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
  margin-left: auto;
}

/* 语言切换：仅图标，下拉选语言，靠右对齐 */
.lang-dropdown-wrap {
  position: relative;
  margin-left: auto;
}

/* 语言切换 - Make 风格：仅图标、中性灰、不抢眼 */
.lang-switcher-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.lang-switcher-btn.lang-btn-icon-only {
  padding: 8px 10px;
  border-radius: 50%;
}

.lang-btn-icon-only .lang-label {
  display: none;
}

.lang-btn-icon-only .lang-chevron {
  display: none;
}

.lang-switcher-btn:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
  background: var(--color-bg-alt);
}

.lang-switcher-btn[aria-expanded="true"] {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.lang-switcher-btn .lang-globe {
  color: currentColor;
}

.lang-globe,
.lang-chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.lang-chevron {
  transition: transform 0.2s;
}

.lang-switcher-btn[aria-expanded="true"] .lang-chevron {
  transform: rotate(180deg);
}

.lang-btn-icon-only .lang-globe {
  margin: 0;
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 160px;
  padding: 6px 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 60;
}

.lang-dropdown[hidden] {
  display: none !important;
}

.lang-option {
  display: block;
  width: 100%;
  padding: 10px 16px;
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: background 0.2s, color 0.2s;
}

.lang-option:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

.lang-option[aria-selected="true"] {
  color: var(--color-primary);
  font-weight: 500;
}

/* Make.com：Log in 为文字链接样式（可点按） */
.btn-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 0;
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: inherit;
  color: var(--color-text-muted);
  background: none;
  border: none;
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.2s;
}

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

.header-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color 0.2s;
}

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

/* Make.com：主 CTA 为紫色 Get started free */
.btn-demo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 20px;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.btn-demo-orange {
  background: var(--color-primary);
  color: #fff;
  box-shadow: none;
  transition: background 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out), transform 0.2s var(--ease-out);
}

.btn-demo-orange:hover {
  background: var(--color-primary-hover);
  color: #fff;
  box-shadow: var(--shadow-primary);
  transform: translateY(-1px);
}

.header-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.logo {
  display: flex;
  align-items: center;
  font-weight: 700;
}
.logo-img {
  height: 32px;
  width: auto;
  display: block;
  object-fit: contain;
}

.logo-byline {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  line-height: 1.2;
  white-space: nowrap;
}

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

.nav-main {
  display: flex;
  align-items: center;
  gap: 0;
  flex: 1;
  justify-content: center;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0 16px;
  height: var(--header-height);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: color 0.2s;
}

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

.nav-link-direct {
  text-decoration: none;
}

.nav-link::after {
  content: '';
  display: none;
}

.nav-item-dropdown .nav-link::after,
.nav-item-mega .nav-link::after {
  display: inline-block;
  margin-left: 4px;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  vertical-align: middle;
}

.mega-menu,
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 280px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s var(--ease-out), visibility 0.25s var(--ease-out), transform 0.25s var(--ease-out);
  z-index: 50;
}

.nav-item-mega .mega-menu {
  left: 0;
  transform: translateY(8px);
  min-width: 520px;
}

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

.nav-item-mega.open .mega-menu,
.nav-item-mega:hover .mega-menu {
  transform: translateY(0);
}

.mega-inner {
  display: flex;
  padding: 20px 24px;
  gap: 32px;
}

.mega-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.mega-col:first-child {
  min-width: 180px;
}

.mega-col:last-child {
  min-width: 260px;
}

.mega-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.mega-col a,
.dropdown-menu a {
  font-size: 0.9375rem;
  color: var(--color-text);
  padding: 6px 0;
  transition: color 0.2s;
}

.mega-col a {
  white-space: nowrap;
}

.mega-col a:hover,
.dropdown-menu a:hover {
  color: var(--color-primary);
}

.dropdown-menu {
  padding: 12px 0;
}

.dropdown-menu a {
  display: block;
  padding: 8px 20px;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
}

[dir="rtl"] .header-inner {
  flex-direction: row-reverse;
}

[dir="rtl"] .nav-main {
  flex-direction: row-reverse;
}


[dir="rtl"] .nav-item-mega .mega-menu {
  left: auto;
  right: 0;
}

[dir="rtl"] .lang-dropdown {
  right: auto;
  left: 0;
}

[dir="rtl"] .lang-option {
  text-align: right;
}

/* Hero - 高级感：大留白、强对比、柔和背景 */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
  background: var(--color-bg);
}

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

.hero-bg::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(ellipse at center, rgba(var(--color-primary-rgb), 0.06) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 1;
}
.hero-bg::after {
  content: '';
  position: absolute;
  top: 40%;
  right: -5%;
  width: 300px;
  height: 300px;
  background: radial-gradient(ellipse at center, rgba(var(--color-primary-rgb), 0.04) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 1;
  filter: blur(60px);
}

.hero-bg img {
  display: none;
}

.hero-inner {
  position: relative;
  z-index: 3;
  padding-top: 72px;
  padding-bottom: 80px;
  display: grid;
  grid-template-columns: 1fr minmax(320px, 1fr);
  gap: 48px 64px;
  align-items: center;
}

.hero-content {
  min-width: 0;
}

.hero-media {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.hero-engine-img {
  width: 100%;
  max-width: 520px;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg), 0 24px 48px rgba(0, 0, 0, 0.08);
  object-fit: contain;
}

/* 官网式眉标：主标题上方小标签 */
.hero-eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin: 0 0 16px;
}

.hero-title {
  font-size: clamp(2.75rem, 5.5vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 24px;
  max-width: 720px;
  color: var(--color-text);
}

.hero-title .text-gradient {
  color: var(--color-primary);
  -webkit-text-fill-color: var(--color-primary);
}

.hero-subtitle {
  font-size: 1.1875rem;
  color: var(--color-text-muted);
  max-width: 540px;
  margin: 0 0 36px;
  line-height: 1.6;
  letter-spacing: 0.01em;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 32px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--color-secondary);
  background: transparent;
  border: 2px solid var(--color-secondary);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.25s var(--ease-out), color 0.25s var(--ease-out), border-color 0.25s;
}

.btn-hero-secondary:hover {
  background: var(--color-secondary);
  color: #fff;
}

/* Pill-style CTA buttons (Make.com: not pill, use standard radius) */
.btn-pill {
  border-radius: var(--radius);
}

.btn-primary.btn-pill {
  padding: 16px 32px;
  box-shadow: none;
}

.btn-primary.btn-pill:hover {
  box-shadow: var(--shadow-primary);
  transform: translateY(-1px);
}

.hero-note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin: 0;
  letter-spacing: var(--letter-wide);
}

/* Hero 邮箱 + 预约演示 入口 */
.hero-email {
  margin-top: 40px;
  max-width: 480px;
}

.hero-email-form {
  display: flex;
  align-items: stretch;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: box-shadow 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}

.hero-email-form:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.hero-email-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.hero-email-input {
  flex: 1;
  min-width: 0;
  padding: 14px 16px 14px 0;
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--color-text);
  background: none;
  border: none;
  outline: none;
}

.hero-email-input::placeholder {
  color: var(--color-text-muted);
}

.hero-email-btn {
  flex-shrink: 0;
  margin: 8px;
  padding: 0 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transition: background 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out), transform 0.2s var(--ease-out);
}

.hero-email-btn:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  transform: translateY(-1px);
}

.hero-email-privacy {
  margin: 12px 0 0;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-media {
    justify-content: center;
  }
  .hero-engine-img {
    max-width: 400px;
  }
}

@media (max-width: 560px) {
  .hero-email-form {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-email-icon {
    padding-left: 16px;
    justify-content: flex-start;
  }
  .hero-email-input {
    padding: 12px 16px;
  }
  .hero-email-btn {
    margin: 0 8px 8px;
  }
  .hero-engine-img {
    max-width: 100%;
  }
}

/* Buttons - 高级感：圆角、轻阴影、悬停反馈 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 26px;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background 0.25s var(--ease-out), color 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out), transform 0.2s var(--ease-out);
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: none;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
  box-shadow: var(--shadow-primary);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--color-secondary);
  color: #fff;
  box-shadow: var(--shadow);
}

.btn-secondary:hover {
  background: #0c1222;
  color: #fff;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1rem;
}

/* Trust strip - 官网式信任条：纯文案、无占位图 */
.trust-strip {
  padding: 40px 0;
  background: var(--color-bg-pure);
  border-bottom: 1px solid var(--color-border-subtle);
}

.trust-strip-inner {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.trust-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin: 0 0 12px;
  letter-spacing: 0.05em;
  opacity: 0.8;
}

.trust-slogan {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin: 0;
  letter-spacing: 0.02em;
  line-height: 1.6;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.trust-desc {
  font-size: 1rem;
  color: var(--color-text);
  margin: 0;
  line-height: 1.6;
  letter-spacing: 0.01em;
}

.trust-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 48px;
}

.trust-logos img {
  height: 28px;
  width: auto;
  max-width: 112px;
  object-fit: contain;
  opacity: 0.5;
  filter: grayscale(1);
  transition: opacity 0.25s var(--ease-out);
}
.trust-logos img:hover {
  opacity: 0.75;
}

/* 底层大模型：带 logo 的引用（放在底部栏上一栏） */
.foundation-models {
  padding: 40px 0 56px;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border-subtle);
}

.foundation-models-above-footer {
  padding: 48px 0 56px;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.foundation-models-label {
  text-align: center;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0 0 40px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.foundation-models-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 32px 48px;
}

.foundation-model-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  min-width: 100px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  font-weight: 500;
  transition: border-color 0.2s var(--ease-out), color 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}

.foundation-model-item:hover {
  border-color: var(--color-gold);
  color: var(--color-text);
  box-shadow: var(--shadow-md);
}

.foundation-model-logo {
  width: 120px;
  height: 48px;
  object-fit: contain;
  object-position: center;
  display: block;
}

.foundation-model-name {
  font-size: 0.8125rem;
  font-weight: 500;
  color: inherit;
}

@media (max-width: 768px) {
  .foundation-models-grid {
    gap: 16px 24px;
  }
  .foundation-model-item {
    min-width: 88px;
    padding: 12px 14px;
  }
  .foundation-model-logo {
    width: 64px;
    height: 26px;
  }
}

/* Sections - 官网式：统一留白、眉标 + 大标题层次 */
.section {
  padding: 100px 0 112px;
  border-top: 1px solid var(--color-border);
}

/* 区块眉标：章节标签，增强层次感 */
.section-eyebrow {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin: 0 0 16px;
  text-align: center;
  opacity: 0.8;
}

.section-eyebrow-light {
  color: rgba(255, 255, 255, 0.6);
}

.section-alt {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

.section-title {
  font-size: clamp(1.875rem, 3.2vw, 2.5rem);
  font-weight: 700;
  letter-spacing: var(--letter-tight);
  margin: 0 0 20px;
  text-align: center;
  color: var(--color-text);
  line-height: 1.25;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 580px;
  margin: 0 auto 56px;
  text-align: center;
  line-height: 1.65;
  letter-spacing: 0.01em;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-primary);
  margin-top: 36px;
  letter-spacing: 0.02em;
  transition: gap 0.3s var(--ease-out), color 0.25s var(--ease-out);
}

.link-arrow:hover {
  gap: 12px;
  color: var(--color-primary-hover);
}

.link-arrow::after {
  content: '→';
  font-weight: 500;
}

/* Value cards */
.section-value .section-subtitle {
  margin-bottom: 56px;
}

.value-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  text-align: center;
}

.value-card {
  padding: 36px 28px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: box-shadow 0.35s var(--ease-out), border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.value-card:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--color-border);
  transform: translateY(-4px);
}

.value-card-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 24px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.value-card-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.value-card h3 {
  font-size: 1.1875rem;
  font-weight: 600;
  margin: 0 0 12px;
  letter-spacing: var(--letter-tight);
  color: var(--color-text);
}

.value-card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.6;
}

.section-value .link-arrow {
  display: block;
  text-align: center;
}

/* Solutions tabs */
.section-solutions {
  background: var(--color-bg-alt);
}

.solutions-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
}

.tab-btn {
  padding: 12px 22px;
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: inherit;
  color: var(--color-text-muted);
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.25s var(--ease-out), background 0.25s var(--ease-out), border-color 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out);
}

.tab-btn:hover {
  color: var(--color-text);
  border-color: var(--color-border);
}

.tab-btn.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.solutions-content {
  position: relative;
  min-height: 400px;
}

.tab-panel {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.tab-panel.active {
  display: grid;
}

.tab-panel-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.tab-panel-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}
.tab-panel:hover .tab-panel-media img {
  transform: scale(1.02);
}

.tab-panel-text h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 16px;
}

.tab-panel-text p {
  color: var(--color-text-muted);
  margin: 0 0 24px;
  line-height: 1.6;
}

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

.feature-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 24px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: box-shadow 0.35s var(--ease-out), border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.feature-card:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--color-border);
  transform: translateY(-3px);
}

.feature-card-img {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
  box-shadow: var(--shadow-md);
}

.feature-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-card span {
  font-weight: 500;
  text-align: center;
}

.section-features .link-arrow {
  display: block;
  text-align: center;
}

/* Success stories */
.success-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.success-card {
  display: block;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow 0.35s var(--ease-out), border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.success-card:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--color-border);
  transform: translateY(-4px);
}

.success-card-img {
  aspect-ratio: 16/10;
  overflow: hidden;
}

.success-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}
.success-card:hover .success-card-img img {
  transform: scale(1.04);
}

.success-card .success-meta {
  display: block;
  padding: 16px 20px 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.success-card h4 {
  padding: 8px 20px 20px;
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 0;
  line-height: 1.4;
}

.section-success .link-arrow {
  display: block;
  text-align: center;
}

/* AI section */
.section-ai {
  background: var(--color-bg-alt);
}

.section-ai-inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: center;
}

.section-ai-text .section-title,
.section-ai-text .section-subtitle {
  text-align: left;
  margin-left: 0;
  margin-right: 0;
}

.section-ai-text .section-subtitle {
  margin-bottom: 24px;
}

.section-ai-media {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: end;
}

.section-ai-media img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.section-ai-media img:first-child {
  align-self: start;
  margin-top: 24px;
}

/* Enterprise */
.section-enterprise-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.section-enterprise-media img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.section-enterprise-text .section-title,
.section-enterprise-text .section-subtitle {
  text-align: left;
  margin-left: 0;
  margin-right: 0;
}

.section-enterprise-text .section-subtitle {
  margin-bottom: 24px;
}

/* Security */
.section-security {
  background: var(--color-bg-alt);
}

.section-security-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.section-security-text .section-title,
.section-security-text .section-subtitle {
  text-align: left;
  margin-left: 0;
  margin-right: 0;
}

.section-security-text .section-subtitle {
  margin-bottom: 24px;
}

.section-security-media img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

/* 动态平台演示 - 可交互简化版界面 */
.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;
}

.section-demo {
  padding: 96px 0 120px;
  text-align: center;
}

.section-demo .section-subtitle {
  margin-bottom: 40px;
}

.section-demo-cta-subtitle {
  margin-top: 2rem;
  margin-bottom: 28px;
}

/* 底部合并：多模型引擎 + 一键体验（底部栏上方） */
.section-bottom-combined {
  background: var(--color-bg-alt);
  padding-bottom: 120px;
}

.bottom-combined-block {
  padding-top: 0;
}

.bottom-combined-block:first-child {
  padding-top: 0;
}

.bottom-combined-divider {
  height: 1px;
  background: var(--color-border);
  margin: 56px 0 48px;
}

.bottom-combined-demo .section-title {
  margin-top: 0;
}

/* 多模型引擎区块 - 带配图与卡片设计（也用于底部合并内） */
.section-multi-model,
.bottom-combined-multi-model {
  background: transparent;
}

.multi-model-hero {
  text-align: center;
  margin-bottom: 56px;
}

.section-multi-model .section-title {
  margin-bottom: 16px;
}

.multi-model-lead {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.multi-model-hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border-subtle);
  max-width: 960px;
  margin: 0 auto;
}

.multi-model-hero-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  display: block;
}

.multi-model-hero-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 20px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-footer-text-bright);
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
}

.multi-model-subtitle {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  margin: 40px 0 20px;
  letter-spacing: var(--letter-tight);
}

.multi-model-subtitle:first-of-type {
  margin-top: 0;
}

/* 核心价值：4 卡片 + 配图 */
.multi-model-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 16px;
}

.multi-model-card {
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}

.multi-model-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border);
}

.multi-model-card-img-wrap {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--color-bg-alt);
}

.multi-model-card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.multi-model-card-text {
  padding: 18px 16px;
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.55;
}

/* 模型矩阵：左图右表 */
.multi-model-matrix-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 40px;
  align-items: start;
  margin-bottom: 24px;
}

.multi-model-matrix-visual {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow);
  background: var(--color-bg-pure);
}

.multi-model-matrix-visual img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
}

.multi-model-visual-label {
  display: block;
  padding: 10px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-subtle);
  letter-spacing: 0.04em;
}

.multi-model-table-wrap {
  overflow-x: auto;
  border: none;
  border-radius: var(--radius);
  background: var(--color-bg-pure);
}

.multi-model-table {
  width: 100%;
  min-width: 400px;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.multi-model-table th,
.multi-model-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: none;
}

.multi-model-table th {
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-bg-alt);
}

.multi-model-table tbody tr:last-child td {
  border-bottom: 0;
}

.multi-model-table tbody tr:hover td {
  background: var(--color-bg-alt);
}

/* 智能路由：左文右图 */
.multi-model-routing-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  align-items: start;
  margin-bottom: 24px;
}

.multi-model-routing-content .multi-model-subtitle {
  margin-top: 0;
}

.multi-model-routing-visual {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow);
  background: var(--color-bg-pure);
}

.multi-model-routing-visual img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
}

.multi-model-routing-visual .multi-model-visual-label {
  border-top: 1px solid var(--color-border-subtle);
}

.multi-model-values {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}

.multi-model-values li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 10px;
  color: var(--color-text);
  line-height: 1.6;
}

.multi-model-values li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-gold);
}

/* 企业级模型管理：3 卡片 + 图标 */
.multi-model-enterprise-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.multi-model-ent-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px 20px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: box-shadow 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}

.multi-model-ent-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-gold);
}

.multi-model-ent-icon {
  flex-shrink: 0;
  color: var(--color-gold);
}

.multi-model-ent-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.55;
}

/* 支持多种底层大模型（嵌入在多模型引擎模块底部） */
.multi-model-foundation {
  margin-top: 48px;
  padding-top: 40px;
  border-top: none;
}

.multi-model-foundation .foundation-models-label {
  margin-bottom: 24px;
}

@media (max-width: 1024px) {
  .multi-model-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .multi-model-matrix-layout {
    grid-template-columns: 1fr;
  }
  .multi-model-matrix-visual {
    max-width: 480px;
  }
  .multi-model-routing-layout {
    grid-template-columns: 1fr;
  }
  .multi-model-routing-visual {
    max-width: 480px;
    order: -1;
  }
}

@media (max-width: 768px) {
  .multi-model-cards {
    grid-template-columns: 1fr;
  }
  .multi-model-enterprise-cards {
    grid-template-columns: 1fr;
  }
  .multi-model-hero-caption {
    font-size: 0.75rem;
    padding: 10px 16px;
  }
}

/* 图文布局：左侧配图 + 右侧演示控件 */
.demo-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 48px;
  align-items: start;
  max-width: 1100px;
  margin: 0 auto 48px;
  text-align: left;
}

.demo-visual {
  position: sticky;
  top: calc(var(--header-height, 64px) + 24px);
}

.demo-visual-frame {
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.demo-visual-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
}

.demo-visual-caption {
  padding: 16px 20px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.demo-visual-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-gold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.demo-widget-wrap {
  min-width: 0;
}

.platform-demo {
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.platform-demo-bar {
  padding: 24px;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border-subtle);
}

.platform-demo-input-wrap {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.platform-demo-input {
  flex: 1;
  min-width: 200px;
  padding: 14px 18px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.platform-demo-input::placeholder {
  color: var(--color-text-muted);
}

.platform-demo-input:focus {
  outline: none;
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(201, 169, 98, 0.15);
}

.platform-demo-btn {
  flex-shrink: 0;
  padding: 14px 28px;
}

.platform-demo-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.platform-demo-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 20px;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.platform-demo-step {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.platform-demo-step-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  transition: background 0.35s var(--ease-out);
}

.platform-demo-step.active .platform-demo-step-dot {
  background: var(--color-gold);
  box-shadow: 0 0 0 2px rgba(201, 169, 98, 0.3);
}

.platform-demo-step.done .platform-demo-step-dot {
  background: var(--color-primary);
}

.platform-demo-output {
  padding: 24px;
}

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

.platform-demo-channel {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  overflow: hidden;
  text-align: left;
}

.platform-demo-channel-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-bg-pure);
  border-bottom: 1px solid var(--color-border-subtle);
}

.platform-demo-channel-icon {
  font-size: 1rem;
  opacity: 0.9;
}

.platform-demo-channel-body {
  padding: 0;
  min-height: 120px;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

/* 邮件拟真：发件人/收件人 + 主题 + 正文 */
.platform-demo-email-mock {
  padding: 12px 14px;
}

.platform-demo-email-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.platform-demo-email-from {
  color: var(--color-text);
  font-weight: 500;
}

.platform-demo-email-subject {
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
  font-size: 0.875rem;
}

.platform-demo-email-body {
  font-size: 0.8125rem;
  line-height: 1.55;
}

/* 社媒拟真：头像 + 账号 + 文案 + 配图 */
.platform-demo-social-mock {
  padding: 0;
}

.platform-demo-social-card {
  border: none;
}

.platform-demo-social-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--color-bg-pure);
  border-bottom: 1px solid var(--color-border-subtle);
}

.platform-demo-social-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--color-bg-alt);
}

.platform-demo-social-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.platform-demo-social-handle {
  display: flex;
  flex-direction: column;
  gap: 0;
  font-size: 0.8125rem;
}

.platform-demo-social-handle strong {
  color: var(--color-text);
  font-weight: 600;
}

.platform-demo-social-handle span {
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

.platform-demo-social-text.platform-demo-typing,
.platform-demo-social-text {
  padding: 12px 14px;
  min-height: 48px;
}

.platform-demo-social-image {
  height: 100px;
  overflow: hidden;
  background: var(--color-bg-alt);
}

.platform-demo-social-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 官网拟真：浏览器栏 + 首图 + 正文 */
.platform-demo-web-mock {
  padding: 0;
}

.platform-demo-web-browser {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border-subtle);
  font-size: 0.7rem;
  color: var(--color-text-muted);
}

.platform-demo-web-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
}

.platform-demo-web-url {
  margin-left: 8px;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.platform-demo-web-hero {
  height: 72px;
  overflow: hidden;
  background: var(--color-bg-alt);
}

.platform-demo-web-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.platform-demo-web-text.platform-demo-typing,
.platform-demo-web-text {
  padding: 12px 14px;
  min-height: 44px;
  font-size: 0.8125rem;
}

.platform-demo-typing {
  white-space: pre-wrap;
  word-break: break-word;
}

.platform-demo-typing.cursor::after {
  content: '';
  display: inline-block;
  width: 2px;
  height: 1em;
  margin-left: 2px;
  background: var(--color-gold);
  animation: demo-cursor-blink 0.8s ease-in-out infinite;
  vertical-align: text-bottom;
}

@keyframes demo-cursor-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}


@media (max-width: 968px) {
  .demo-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .demo-visual {
    position: static;
  }
  .demo-visual-img {
    aspect-ratio: 16/10;
  }
}

@media (max-width: 768px) {
  .platform-demo-channels {
    grid-template-columns: 1fr;
  }
  .platform-demo-input-wrap {
    flex-direction: column;
    align-items: stretch;
  }
  .platform-demo-steps {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }
  .demo-visual-caption span:last-child {
    font-size: 0.8125rem;
  }
}

/* CTA - 高级感：大留白、强对比 */
.section-cta {
  padding: 120px 0;
  text-align: center;
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

/* Footer - 四栏排版，深色底 */
.footer {
  padding: 72px 0 32px;
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-col {
  min-width: 0;
}

.footer-logo {
  display: inline-block;
  margin-bottom: 16px;
}

.footer-logo-img {
  height: 36px;
  width: auto;
  display: block;
  object-fit: contain;
}

.footer-tagline {
  margin: 0 0 24px;
  font-size: 0.9375rem;
  color: var(--color-footer-text);
  line-height: 1.6;
  max-width: 280px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--color-footer-text);
}

.footer-contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.footer-contact-item a {
  color: var(--color-footer-text-bright);
  font-weight: 500;
}

.footer-contact-item a:hover {
  color: var(--color-primary);
}

.footer-follow-heading {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-footer-text-bright);
  margin: 0 0 12px;
}

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

.footer-social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--color-footer-text);
  border-radius: var(--radius);
  transition: color 0.2s, background 0.2s;
}

.footer-social-link:hover {
  color: var(--color-primary);
  background: rgba(255,255,255,0.06);
}

.footer-heading {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-footer-text-bright);
  margin: 0 0 20px;
  letter-spacing: 0.02em;
}

.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-list li {
  margin-bottom: 10px;
}

.footer-list a {
  font-size: 0.9375rem;
  color: var(--color-footer-text-bright);
  transition: color 0.2s;
}

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

.footer-subscribe-desc {
  font-size: 0.875rem;
  color: var(--color-footer-text);
  line-height: 1.55;
  margin: 0 0 20px;
}

.footer-subscribe-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.footer-subscribe-input {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg-pure);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.2s;
}

.footer-subscribe-input::placeholder {
  color: var(--color-footer-text);
}

.footer-subscribe-input:focus {
  border-color: var(--color-primary);
}

.footer-subscribe-btn {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transition: background 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out);
}

.footer-subscribe-btn:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.footer-compliance {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.8125rem;
  color: var(--color-footer-text);
}

.footer-compliance li {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.footer-compliance-icon {
  color: var(--color-gold);
  font-weight: 700;
  flex-shrink: 0;
}

.footer-bottom {
  padding-top: 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
}

.footer-legal a {
  font-size: 0.8125rem;
  color: var(--color-footer-text);
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}

.footer-legal a:hover {
  color: var(--color-footer-text-bright);
}

.footer-legal-sep {
  font-size: 0.75rem;
  color: var(--color-footer-text);
  opacity: 0.6;
}

.footer-bottom p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-footer-text);
  letter-spacing: 0.02em;
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .footer {
    padding: 48px 0 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-bottom: 32px;
  }
  .footer-subscribe-form {
    flex-direction: row;
  }
  .footer-subscribe-input {
    flex: 1;
    min-width: 0;
  }
  .footer-subscribe-btn {
    width: auto;
    flex-shrink: 0;
  }
}

/* Responsive */
@media (max-width: 1024px) {
  .tab-panel {
    grid-template-columns: 1fr;
  }

  .tab-panel-media {
    order: -1;
  }

  .tab-panel-media img {
    height: 240px;
  }

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

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

  .section-ai-inner,
  .section-enterprise-inner,
  .section-security-inner {
    grid-template-columns: 1fr;
  }

  .section-enterprise-inner .section-enterprise-media {
    order: -1;
  }
}

@media (max-width: 1024px) {
  .nav-main {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }
}

@media (max-width: 768px) {
  .header-right {
    gap: 8px;
  }

  .lang-switcher-btn {
    padding: 6px 12px;
    font-size: 0.8125rem;
  }

  .lang-label {
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .nav-main.open {
    display: flex;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: auto;
    flex-direction: column;
    align-items: stretch;
    padding: 24px;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    gap: 0;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }

  .nav-main.open .nav-link {
    height: auto;
    padding: 12px 16px;
    justify-content: flex-start;
  }

  .nav-main.open .nav-link::after {
    display: none;
  }

  .nav-main.open .mega-menu,
  .nav-main.open .dropdown-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    border: none;
    border-radius: 0;
    background: var(--color-bg-alt);
    margin-left: 16px;
    margin-top: 4px;
    margin-bottom: 8px;
  }

  .nav-main.open .mega-inner {
    flex-direction: column;
    padding: 12px 16px;
  }

  .nav-main.open .dropdown-menu {
    padding: 8px 0 8px 16px;
  }

  .nav-item-mega .mega-menu,
  .nav-item-dropdown .dropdown-menu {
    display: none;
  }

  .nav-item.open .mega-menu,
  .nav-item.open .dropdown-menu {
    display: block;
  }

  .value-cards {
    grid-template-columns: 1fr;
  }

  .solutions-tabs {
    flex-direction: column;
  }

  .tab-btn {
    width: 100%;
    text-align: center;
  }

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

  .section-ai-media {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 56px 0;
  }
}

/* ========== 登录/注册弹窗（参考 Manus 风格） ========== */
.login-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.login-modal-overlay[hidden] {
  display: none !important;
}

.login-modal {
  position: relative;
  width: 100%;
  max-width: 400px;
  padding: 40px 32px 28px;
  background: var(--color-bg-pure);
  border-radius: var(--radius-xl);
  box-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.15), 0 0 0 1px var(--color-border-subtle);
}

/* 双栏弹窗：左侧文案 + 马上体验，右侧配图 */
.login-modal-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  max-width: 720px;
  padding: 0;
  overflow: hidden;
}

.login-modal-left {
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.login-modal-split .login-modal-title {
  font-size: 1.75rem;
  margin-bottom: 10px;
}

.login-modal-split .login-modal-subtitle {
  font-size: 1rem;
  margin-bottom: 20px;
  line-height: 1.5;
}

.login-modal-form {
  margin-bottom: 4px;
}

.login-modal-split .login-modal-form {
  margin-top: 0;
}

.login-password-input {
  margin-top: 0;
}

.login-social-row {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.login-modal-split .login-modal-footer {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.login-modal-experience-link {
  color: var(--color-primary);
  font-weight: 600;
  margin-left: 4px;
}

.login-modal-experience-link:hover {
  text-decoration: underline;
}

.login-modal-experience-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 280px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  box-shadow: var(--shadow-md);
  transition: background 0.25s var(--ease-out), transform 0.2s var(--ease-out);
}

.login-modal-experience-btn:hover {
  background: var(--color-primary-hover);
  color: #fff;
  transform: translateY(-1px);
}

.login-modal-right {
  min-height: 320px;
  background: var(--color-footer-bg);
}

.login-modal-right img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.9;
}

@media (max-width: 640px) {
  .login-modal-split {
    grid-template-columns: 1fr;
  }
  .login-modal-right {
    min-height: 200px;
    order: -1;
  }
  .login-modal-left {
    padding: 32px 24px;
  }
}

.login-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 2;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-text-muted);
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius);
  transition: color 0.2s, background 0.2s;
}

.login-modal-close:hover {
  color: var(--color-text);
  background: var(--color-bg-alt);
}

.login-modal-header {
  text-align: center;
  margin-bottom: 28px;
}

.login-modal-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

.login-modal-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--color-text);
}

.login-modal-subtitle {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
}

.login-modal-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login-social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 12px 16px;
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.login-social-btn:hover {
  background: var(--color-bg-alt);
  border-color: var(--color-border);
}

.login-social-icon {
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 600;
}

.login-social-google { color: #4285f4; }
.login-social-google svg { display: block; flex-shrink: 0; }
.login-social-ms { color: #00a4ef; font-size: 1.25rem; }
.login-social-apple { font-size: 1.25rem; color: var(--color-text); }
.login-social-apple::before { content: ''; display: inline-block; width: 18px; height: 18px; background: currentColor; -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'%3E%3Cpath d='M17.05 20.28c-.98.95-2.05.8-3.08.35-1.09-.46-2.09-.48-3.24 0-1.44.62-2.2.44-3.06-.35C2.79 15.25 3.51 7.59 9.05 7.31c1.35.07 2.29.74 3.08.8 1.18-.24 2.31-.93 3.57-.84 1.51.12 2.65.72 3.4 1.8-3.12 1.87-2.38 5.98.48 7.13-.57 1.5-1.31 2.99-2.54 4.09l.01-.01zM12.03 7.25c-.15-2.23 1.66-4.07 3.74-4.25.29 2.58-2.34 4.5-3.74 4.25z'/%3E%3C/svg%3E") center/contain no-repeat; mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'%3E%3Cpath d='M17.05 20.28c-.98.95-2.05.8-3.08.35-1.09-.46-2.09-.48-3.24 0-1.44.62-2.2.44-3.06-.35C2.79 15.25 3.51 7.59 9.05 7.31c1.35.07 2.29.74 3.08.8 1.18-.24 2.31-.93 3.57-.84 1.51.12 2.65.72 3.4 1.8-3.12 1.87-2.38 5.98.48 7.13-.57 1.5-1.31 2.99-2.54 4.09l.01-.01zM12.03 7.25c-.15-2.23 1.66-4.07 3.74-4.25.29 2.58-2.34 4.5-3.74 4.25z'/%3E%3C/svg%3E") center/contain no-repeat; }

.login-modal-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 8px 0 4px;
}

.login-modal-divider::before,
.login-modal-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.login-modal-divider span {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.login-modal-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 4px;
}

.login-email-input {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.2s;
}

.login-email-input::placeholder {
  color: var(--color-text-muted);
}

.login-email-input:focus {
  border-color: var(--color-primary);
}

.login-continue-btn {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: var(--color-secondary);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s;
}

.login-continue-btn:hover {
  background: var(--color-primary-hover);
}

.login-modal-footer {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.login-modal-from {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin: 0 0 8px;
}

.login-modal-from strong {
  color: var(--color-text);
}

.login-modal-legal {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin: 0;
}

.login-modal-legal a {
  color: var(--color-text-muted);
}

.login-modal-legal a:hover {
  color: var(--color-primary);
}

/* ========== 子页面通用 + 价格页 ========== */
.page-main {
  padding-top: var(--header-height);
  min-height: 100vh;
}

.page-hero {
  padding-top: 48px;
  padding-bottom: 32px;
}

.page-hero .section-title {
  margin-bottom: 8px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  position: relative;
  padding: 32px 28px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: box-shadow 0.35s var(--ease-out), border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.pricing-card:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--color-border);
  transform: translateY(-3px);
}

.pricing-card-featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-card);
}
.pricing-card-featured:hover {
  box-shadow: 0 0 0 1px var(--color-primary), 0 8px 32px rgba(0, 0, 0, 0.08);
}

.pricing-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border-radius: 999px;
}

.pricing-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 4px;
  color: var(--color-text);
}

.pricing-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 16px;
}

.pricing-price {
  margin-bottom: 4px;
}

.pricing-amount {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
}

.pricing-period {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.pricing-note {
  font-size: 0.8125rem;
  color: var(--color-primary);
  margin: 0 0 20px;
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}

.pricing-features li {
  padding: 6px 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-grid-three {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 768px) {
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid-three {
    grid-template-columns: 1fr;
  }
}

/* 定价页 - 功能对比表 */
.pricing-compare-wrap {
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid var(--color-border);
}

.pricing-compare-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--color-text);
}

.pricing-compare-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 24px;
  line-height: 1.5;
}

.pricing-compare {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.pricing-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 0.9375rem;
  background: var(--color-bg-pure);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.pricing-table th,
.pricing-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--color-border-subtle);
  vertical-align: top;
}

.pricing-table thead th {
  background: var(--color-bg-alt);
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 2px solid var(--color-border);
}

.pricing-table .pricing-table-feature {
  width: 22%;
  min-width: 140px;
  color: var(--color-text);
}

.pricing-table .pricing-table-tier {
  width: 26%;
  min-width: 120px;
}

.pricing-table tbody tr:hover {
  background: rgba(0, 0, 0, 0.02);
}

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

.pricing-table td:not(.pricing-table-feature) {
  color: var(--color-text-muted);
}

.pricing-table strong {
  color: var(--color-text);
}

@media (max-width: 768px) {
  .pricing-compare-wrap {
    margin-top: 48px;
    padding-top: 32px;
  }
  .pricing-table th,
  .pricing-table td {
    padding: 12px 14px;
    font-size: 0.875rem;
  }
}

/* 子页面内容区 */
.page-content .container {
  padding-top: 48px;
  padding-bottom: 64px;
}

.page-content h1 {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 16px;
  color: var(--color-text);
}

.page-content .lead {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin: 0 0 32px;
  line-height: 1.6;
}

.page-content h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 32px 0 12px;
  color: var(--color-text);
}

.page-content p {
  margin: 0 0 16px;
  line-height: 1.6;
  color: var(--color-text-muted);
}

/* ========== 关于我们页 About Us ========== */
.page-content-about {
  padding-top: var(--header-height);
}

.about-container {
  width: 100%;
  max-width: 1160px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 1) Hero（背景图 + 遮罩，保证文字可读） */
.about-hero {
  position: relative;
  padding: 72px 0 80px;
  border-bottom: 1px solid var(--color-border-subtle);
  overflow: hidden;
}

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

.about-hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 1;
}

.about-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.75) brightness(1.05);
}

.about-hero-inner {
  position: relative;
  z-index: 2;
}

.about-hero-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: var(--letter-tight);
  margin: 0 0 24px;
  color: #fff;
  line-height: 1.2;
}

.about-hero-subhead {
  font-size: 1.125rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.92);
  max-width: 720px;
  margin: 0 0 16px;
}

.about-hero-meta {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.04em;
  margin: 0 0 32px;
}

.about-hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.about-hero-ctas .btn-primary {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

.about-hero-ctas .btn-primary:hover {
  background: var(--color-bg);
  color: var(--color-primary);
}

.about-hero-ctas .btn-hero-secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.8);
}

.about-hero-ctas .btn-hero-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border-color: #fff;
}

/* 2) Mission / Vision 两列 */
.about-block {
  padding: 80px 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

.about-mission-vision {
  background: linear-gradient(180deg, var(--color-bg-pure) 0%, var(--about-warm) 100%);
}

.about-mv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.about-card {
  padding: 36px 32px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-left: 4px solid var(--color-gold);
  border-radius: var(--radius-lg);
  box-shadow: var(--about-shadow-warm);
  transition: box-shadow 0.3s var(--ease-out), transform 0.25s var(--ease-out);
}

.about-card:hover {
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.08), 0 0 0 1px var(--about-gold-border);
  transform: translateY(-2px);
}

.about-card-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin: 0 0 12px;
}

.about-card-text {
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text);
  margin: 0;
}

/* 3) 我们在解决什么 */
.about-problems {
  background: linear-gradient(180deg, var(--about-warm) 0%, var(--color-bg) 100%);
}

.about-problems .about-section-title {
  padding-bottom: 12px;
  border-bottom: 3px solid var(--color-gold);
  display: inline-block;
}

.about-section-title {
  font-size: clamp(1.5rem, 2.5vw, 1.875rem);
  font-weight: 700;
  letter-spacing: var(--letter-tight);
  margin: 0 0 20px;
  color: var(--color-text);
}

.about-section-intro {
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  margin: 0 0 24px;
  max-width: 640px;
}

.about-problems-list {
  margin: 0 0 24px;
  padding-left: 0;
  list-style: none;
}

.about-problems-list li {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 14px;
  padding-left: 28px;
  position: relative;
}

.about-problems-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-gold);
}

.about-section-closing {
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text);
  margin: 0;
  padding: 24px 0 0;
  border-top: 2px solid var(--about-gold-border);
  max-width: 640px;
}

/* 4) 我们如何做到 6 张卡片 */
.about-capabilities {
  background: linear-gradient(180deg, var(--color-bg-pure) 0%, var(--about-warm) 100%);
}

.about-capabilities .about-section-title {
  padding-bottom: 12px;
  border-bottom: 3px solid var(--color-gold);
  display: inline-block;
}

.about-caps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.about-cap-card {
  padding: 28px 24px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-top: 3px solid var(--color-gold);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: box-shadow 0.3s var(--ease-out), border-color 0.25s var(--ease-out), background 0.25s ease;
}

.about-cap-card:hover {
  box-shadow: var(--about-shadow-warm);
  border-top-color: var(--color-gold-hover);
  background: rgba(255, 255, 255, 0.95);
}

.about-cap-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 10px;
  color: var(--color-text);
  line-height: 1.3;
}

.about-cap-desc {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin: 0;
}

/* 5) 安全与隐私 */
.about-security {
  background: linear-gradient(180deg, var(--about-trust-bg) 0%, var(--color-bg-alt) 100%);
}

.about-security .about-section-title {
  padding-bottom: 12px;
  border-bottom: 3px solid var(--color-gold);
  display: inline-block;
}

.about-security-list {
  margin: 0 0 20px;
  padding-left: 0;
  list-style: none;
}

.about-security-list li {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 12px;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-gold);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.about-security-list strong {
  color: var(--color-text);
  font-weight: 600;
}

.about-security-note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin: 0;
  font-style: italic;
}

/* 6) 价值观 4 张 */
.about-values {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--about-warm) 100%);
}

.about-values .about-section-title {
  padding-bottom: 12px;
  border-bottom: 3px solid var(--color-gold);
  display: inline-block;
}

.about-values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 32px;
}

.about-value-card {
  padding: 28px 20px;
  text-align: center;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95) 0%, var(--about-gold-tint) 100%);
  border: 2px solid var(--about-gold-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--about-shadow-warm);
  transition: transform 0.25s var(--ease-out), box-shadow 0.3s var(--ease-out), border-color 0.25s ease;
}

.about-value-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08), 0 0 0 1px var(--color-gold);
  border-color: var(--color-gold);
}

/* 7) Footer CTA */
.about-cta {
  padding: 88px 0;
  background: linear-gradient(180deg, var(--about-warm) 0%, #e8e5de 100%);
  border-bottom: 1px solid var(--color-border);
}

.about-cta-inner {
  text-align: center;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.about-cta-title {
  font-size: clamp(1.5rem, 2.5vw, 1.875rem);
  font-weight: 700;
  margin: 0 0 16px;
  color: var(--color-text);
  line-height: 1.3;
}

.about-cta-copy {
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  margin: 0 0 28px;
}

.about-cta-buttons {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.about-cta .btn-primary {
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

.about-cta .btn-primary:hover {
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

.about-cta-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-gold);
  transition: color 0.2s ease;
}

.about-cta-link:hover {
  color: var(--color-gold-hover);
}

@media (max-width: 900px) {
  .about-mv-grid {
    grid-template-columns: 1fr;
  }
  .about-caps-grid {
    grid-template-columns: 1fr;
  }
  .about-values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .about-values-grid {
    grid-template-columns: 1fr;
  }
  .about-hero {
    padding: 48px 0 56px;
  }
  .about-block {
    padding: 56px 0;
  }
}

/* ========== 产品子页统一模板（8 段结构） ========== */
.page-content-product {
  padding-top: var(--header-height);
}

.product-wrap {
  display: flex;
  gap: 48px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.product-main {
  flex: 1;
  min-width: 0;
}

.product-aside {
  width: 200px;
  flex-shrink: 0;
}

@media (max-width: 1024px) {
  .product-wrap { flex-direction: column; }
  .product-aside { width: 100%; }
}

/* 面包屑 */
.product-breadcrumb {
  padding: 16px 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.product-breadcrumb a {
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}

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

.product-breadcrumb span { margin: 0 6px; }

/* 企业级信任条 */
.product-trust-bar {
  padding: 12px 0 24px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
}

/* 锚点导航（sticky） */
.product-sticky-nav {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.product-sticky-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--color-border);
  padding-left: 16px;
}

.product-sticky-nav a {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  padding: 6px 0;
  transition: color 0.2s ease;
}

.product-sticky-nav a:hover,
.product-sticky-nav a.is-active { color: var(--color-primary); }

@media (max-width: 1024px) {
  .product-sticky-nav { position: static; margin-bottom: 24px; }
  .product-sticky-nav ul { display: flex; flex-wrap: wrap; gap: 8px; border-left: none; padding-left: 0; }
  .product-sticky-nav a { padding: 8px 14px; background: var(--color-bg-alt); border-radius: var(--radius); }
}

/* Hero */
.product-hero {
  padding: 32px 0 48px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.product-hero h1 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  margin: 0 0 16px;
  color: var(--color-text);
  line-height: 1.25;
}

.product-hero .product-hero-value {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin: 0 0 24px;
  max-width: 640px;
  line-height: 1.6;
}

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

/* 通用 section */
.product-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

.product-section-title {
  font-size: 1.375rem;
  font-weight: 700;
  margin: 0 0 20px;
  color: var(--color-text);
}

.product-section-intro {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin: 0 0 24px;
  line-height: 1.6;
}

/* 痛点：3 短句 */
.product-pain-points ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.product-pain-points li {
  font-size: 1rem;
  color: var(--color-text);
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border-subtle);
  padding-left: 28px;
  position: relative;
}

.product-pain-points li:last-child { border-bottom: none; }

.product-pain-points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 1.1em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-gold);
}

/* 你会得到什么：卡片 */
.product-outcomes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.product-outcome-card {
  padding: 24px 20px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-left: 4px solid var(--color-gold);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.product-outcome-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 8px;
  color: var(--color-text);
}

.product-outcome-card p { font-size: 0.9375rem; color: var(--color-text-muted); margin: 0; line-height: 1.5; }

/* How it works：步骤条 */
.product-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
  margin: 24px 0 0;
}

.product-step {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9375rem;
  color: var(--color-text);
  padding: 10px 16px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
}

.product-step-arrow {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .product-steps { flex-direction: column; align-items: flex-start; }
  .product-step-arrow { transform: rotate(90deg); margin-left: 16px; }
}

/* 核心能力：icon + 2 行 */
.product-capabilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.product-cap-item {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
}

.product-cap-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--about-gold-tint);
  border-radius: var(--radius);
  color: var(--color-gold);
}

.product-cap-item h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 6px;
  color: var(--color-text);
}

.product-cap-item p { font-size: 0.9375rem; color: var(--color-text-muted); margin: 0; line-height: 1.5; }

/* 示例区 */
.product-examples {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.product-example-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  background: var(--color-bg);
}

.product-example-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.product-example-card .product-example-caption {
  padding: 14px 16px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* 相关模块 Cross-sell */
.product-cross-sell-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.product-cross-sell-grid a {
  display: block;
  padding: 20px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  font-weight: 600;
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.product-cross-sell-grid a:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-md);
}

/* FAQ + CTA */
.product-faq-list {
  margin: 0 0 40px;
  padding: 0;
  list-style: none;
}

.product-faq-list li {
  border-bottom: 1px solid var(--color-border-subtle);
  padding: 18px 0;
}

.product-faq-list li:first-child { padding-top: 0; }

.product-faq-list strong {
  display: block;
  font-size: 1rem;
  color: var(--color-text);
  margin-bottom: 6px;
}

.product-faq-list p { font-size: 0.9375rem; color: var(--color-text-muted); margin: 0; line-height: 1.55; }

.product-cta-block {
  text-align: center;
  padding: 48px 24px;
  background: linear-gradient(180deg, var(--about-warm) 0%, #e8e5de 100%);
  border-radius: var(--radius-lg);
}

.product-cta-block h3 {
  font-size: 1.375rem;
  font-weight: 700;
  margin: 0 0 12px;
  color: var(--color-text);
}

.product-cta-block p { font-size: 1rem; color: var(--color-text-muted); margin: 0 0 24px; line-height: 1.6; }

.product-cta-block .btn { margin-right: 10px; margin-bottom: 8px; }

/* EDM 子页：Hero 左文右预览 */
.product-hero-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 40px 0 56px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.product-hero-split .product-hero-text h1 { margin-bottom: 16px; }
.product-hero-split .product-hero-text .product-hero-value { margin-bottom: 24px; max-width: 100%; }
.product-hero-split .product-hero-preview {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  background: var(--color-bg-alt);
  box-shadow: var(--shadow-md);
}

.product-edm-preview-wrap {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 16px;
  padding: 24px;
  min-height: 280px;
}

.product-edm-preview-desktop {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 4/3;
  border-radius: 8px;
  background: linear-gradient(145deg, #f5f5f5 0%, #e8e8e8 100%);
  border: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.product-edm-preview-mobile {
  width: 100px;
  aspect-ratio: 9/16;
  border-radius: 8px;
  background: linear-gradient(145deg, #f0f0f0 0%, #e0e0e0 100%);
  border: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* EDM 示例 Tabs：左说明 + 右预览图 */
.product-edm-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.product-edm-tabs .tab-btn {
  padding: 10px 18px;
  font-size: 0.9375rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border-subtle);
  background: var(--color-bg-pure);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.product-edm-tabs .tab-btn:hover {
  color: var(--color-text);
  border-color: var(--color-border);
}

.product-edm-tabs .tab-btn.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}

.product-edm-tab-panel {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
  margin-top: 24px;
}

.product-edm-tab-panel.active {
  display: grid;
}

.product-edm-tab-desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

.product-edm-tab-preview {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  background: var(--color-bg-alt);
}

.product-edm-tab-preview img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

@media (max-width: 900px) {
  .product-hero-split { grid-template-columns: 1fr; }
  .product-hero-split .product-hero-preview { order: -1; max-width: 400px; margin: 0 auto; }
  .product-edm-tab-panel { grid-template-columns: 1fr; }
  .product-edm-tab-preview { order: -1; }
}

@media (max-width: 640px) {
  .product-edm-preview-wrap { flex-direction: column; align-items: center; min-height: 240px; }
}

/* Social Media 子页：Hero 右侧四平台预览网格 */
.product-social-platform-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 16px;
  min-height: 240px;
}

.product-social-platform-card {
  border-radius: var(--radius);
  border: 1px solid var(--color-border-subtle);
  background: var(--color-bg-pure);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  font-weight: 600;
  min-height: 100px;
}

/* Social 示例 Tabs：左文案块（短/中/长） + 右排版预览 */
.product-social-tabs .tab-btn { padding: 10px 16px; font-size: 0.9375rem; border-radius: var(--radius); border: 1px solid var(--color-border-subtle); background: var(--color-bg-pure); color: var(--color-text-muted); cursor: pointer; transition: color 0.2s, border-color 0.2s, background 0.2s; }
.product-social-tabs .tab-btn:hover { color: var(--color-text); border-color: var(--color-border); }
.product-social-tabs .tab-btn.active { color: var(--color-primary); background: var(--color-primary-light); border-color: var(--color-primary); }

.product-social-tab-panel {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
  margin-top: 24px;
}

.product-social-tab-panel.active {
  display: grid;
}

.product-social-copy-blocks {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.product-social-copy-block {
  padding: 14px 16px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-gold);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.product-social-copy-block strong {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  margin-bottom: 6px;
}

.product-social-layout-preview {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  background: var(--color-bg-alt);
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.product-social-layout-preview img {
  width: 100%;
  height: 100%;
  min-height: 260px;
  object-fit: cover;
}

@media (max-width: 900px) {
  .product-social-tab-panel { grid-template-columns: 1fr; }
  .product-social-layout-preview { order: -1; min-height: 220px; }
}

/* 视频内容创作子页：Hero 右侧分镜板 + 脚本卡片 */
.product-video-hero-preview {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px;
  min-height: 260px;
}

.product-video-storyboard {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.product-video-storyboard-cell {
  width: 72px;
  height: 48px;
  border-radius: 6px;
  background: linear-gradient(145deg, #e8e8e8 0%, #ddd 100%);
  border: 1px solid var(--color-border-subtle);
  flex-shrink: 0;
  font-size: 0.7rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-video-script-card {
  padding: 16px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  min-height: 80px;
}

.product-video-script-card strong {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  margin-bottom: 8px;
}

/* 视频示例：模板库卡片 + 弹层 */
.product-video-templates {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.product-video-template-card {
  padding: 24px 20px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
  text-align: center;
}

.product-video-template-card:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-md);
}

.product-video-template-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 8px;
  color: var(--color-text);
}

.product-video-template-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.5;
}

/* 视频示例弹层 */
.product-video-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0,0,0,0.5);
  align-items: center;
  justify-content: center;
  padding: 24px;
  box-sizing: border-box;
}

.product-video-modal.is-open {
  display: flex;
}

.product-video-modal-content {
  background: var(--color-bg-pure);
  border-radius: var(--radius-lg);
  max-width: 720px;
  width: 100%;
  max-height: 90vh;
  overflow: auto;
  box-shadow: var(--shadow-lg);
  position: relative;
  padding: 28px 24px 24px;
}

.product-video-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border: none;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--color-text-muted);
  padding: 0;
}

.product-video-modal-close:hover {
  color: var(--color-text);
  background: var(--color-border-subtle);
}

.product-video-modal h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 16px;
  color: var(--color-text);
  padding-right: 44px;
}

.product-video-modal-script {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  padding: 16px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-gold);
}

.product-video-modal-storyboard {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.product-video-modal-storyboard .product-video-storyboard-cell {
  width: 100px;
  height: 64px;
}

@media (max-width: 768px) {
  .product-video-templates { grid-template-columns: 1fr; }
}

/* ========== 平台能力全景页 /product/platform（参考首页内容分区，无本页 TOC）========== */
.page-platform .platform-hero-block .hero-inner {
  grid-template-columns: 1fr;
  text-align: center;
}

.page-platform .platform-hero-block .hero-content {
  text-align: center;
}

.page-platform .platform-hero-block .hero-subtitle {
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.platform-hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.platform-metrics-inline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 32px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.platform-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.platform-metric-card {
  padding: 20px 16px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  text-align: center;
}

.platform-metric-card strong {
  display: block;
  font-size: 1rem;
  color: var(--color-text);
  margin-bottom: 4px;
}

.platform-metric-card span {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* Overview */
.platform-overview {
  padding: 48px 0 56px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.platform-overview-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: start;
  margin-top: 24px;
}

.platform-overview-diagram {
  position: relative;
  min-height: 280px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.platform-overview-diagram img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  display: block;
}

.platform-overview-flow {
  display: block;
  padding: 16px;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  background: var(--color-bg-pure);
  border-top: 1px solid var(--color-border-subtle);
}

.platform-overview-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 20px;
  color: var(--color-text);
}

.platform-overview-points {
  list-style: none;
  margin: 0;
  padding: 0;
}

.platform-overview-points li {
  padding: 12px 0 12px 28px;
  position: relative;
  font-size: 1rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border-subtle);
}

.platform-overview-points li:last-child { border-bottom: none; }

.platform-overview-points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 1.2em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-gold);
}

/* Capability Section 统一骨架 */
.capability-section {
  padding: 56px 0;
  border-bottom: 1px solid var(--color-border-subtle);
  scroll-margin-top: 100px;
}

.capability-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.capability-section-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  color: var(--color-text);
}

.capability-copy-link {
  flex-shrink: 0;
  padding: 8px 14px;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.capability-copy-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.capability-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
  margin-bottom: 32px;
}

.capability-section--textRight .capability-intro {
  direction: rtl;
}

.capability-section--textRight .capability-intro > * {
  direction: ltr;
}

.capability-intro-text h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--color-text);
}

.capability-intro-text p {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.6;
}

.capability-intro-visual {
  min-height: 220px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.capability-intro-visual img {
  width: 100%;
  height: 100%;
  min-height: 220px;
  object-fit: cover;
  display: block;
}

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

.capability-feature-card {
  padding: 20px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-gold);
}

.capability-feature-card h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin: 0 0 6px;
  color: var(--color-text);
}

.capability-feature-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.5;
}

.capability-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: center;
  margin-bottom: 28px;
}

.capability-step {
  font-size: 0.9375rem;
  color: var(--color-text);
  padding: 8px 14px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
}

.capability-step-arrow {
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

.capability-example {
  margin-bottom: 28px;
  padding: 0;
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  overflow: hidden;
}

.capability-example-label {
  margin: 0;
  padding: 16px 24px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  background: var(--color-bg-pure);
  border-bottom: 1px solid var(--color-border-subtle);
}

.capability-example img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  display: block;
}

.capability-crosslinks {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.capability-crosslinks a {
  display: inline-block;
  padding: 10px 18px;
  font-size: 0.9375rem;
  color: var(--color-text);
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.capability-crosslinks a:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow);
}

/* FAQ Accordion */
.platform-faq {
  padding: 48px 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

.platform-faq h2 {
  font-size: 1.375rem;
  font-weight: 700;
  margin: 0 0 24px;
  color: var(--color-text);
}

.platform-faq-item {
  border-bottom: 1px solid var(--color-border-subtle);
}

.platform-faq-item:first-child { border-top: 1px solid var(--color-border-subtle); }

.platform-faq-q {
  width: 100%;
  padding: 18px 40px 18px 0;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
}

.platform-faq-q::after {
  content: '+';
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  color: var(--color-text-muted);
}

.platform-faq-item.is-open .platform-faq-q::after {
  content: '−';
}

.platform-faq-a {
  padding: 0 24px 18px 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  display: none;
}

.platform-faq-item.is-open .platform-faq-a {
  display: block;
}

/* Platform CTA */
.platform-cta {
  text-align: center;
  padding: 56px 24px;
  background: linear-gradient(180deg, var(--about-warm) 0%, #e8e5de 100%);
  border-radius: var(--radius-lg);
  margin-top: 48px;
}

.platform-cta h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 12px;
  color: var(--color-text);
}

.platform-cta p {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin: 0 0 24px;
  line-height: 1.6;
}

.platform-cta .btn { margin: 0 8px 8px 0; }

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

  .platform-overview-grid { grid-template-columns: 1fr; }

  .capability-intro { grid-template-columns: 1fr; }

  .capability-section--textRight .capability-intro { direction: ltr; }

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

@media (max-width: 640px) {
  .platform-metrics-inline,
  .platform-metrics { grid-template-columns: 1fr; }
  .platform-hero-ctas { flex-direction: column; }
}

/* 资源中心子页：Blog / 白皮书 / API 文档 */
.page-content-resources .res-hero {
  text-align: center;
  margin-bottom: 48px;
}

.page-content-resources .res-hero h1 {
  margin-bottom: 12px;
}

.page-content-resources .res-hero .lead {
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

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

.res-card {
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}

.res-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border);
}

.res-card-img {
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--color-bg-alt);
}

.res-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.res-card-body {
  padding: 20px;
}

.res-card-meta {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-gold);
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.res-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 0 0 10px;
  line-height: 1.4;
}

.res-card h3 a {
  color: var(--color-text);
}

.res-card h3 a:hover {
  color: var(--color-gold);
}

.res-card-excerpt {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin: 0 0 12px;
}

.res-card-date {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.res-whitepaper-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.res-wp-card {
  display: flex;
  gap: 24px;
  padding: 28px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: box-shadow 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}

.res-wp-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-gold);
}

.res-wp-card-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gold);
}

.res-wp-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 8px;
}

.res-wp-card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 16px;
  line-height: 1.55;
}

.api-docs-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
}

.api-docs-nav {
  position: sticky;
  top: calc(var(--header-height, 64px) + 24px);
}

.api-docs-nav h3 {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 12px;
}

.api-docs-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.api-docs-nav a {
  display: block;
  padding: 8px 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.api-docs-nav a:hover,
.api-docs-nav a.current {
  color: var(--color-primary);
}

.api-docs-content h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 32px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

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

.api-endpoint {
  margin-bottom: 28px;
  padding: 20px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  border: 1px solid var(--color-border-subtle);
}

.api-endpoint-method {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
  margin-right: 12px;
}

.api-endpoint-method.get { background: #dcfce7; color: #166534; }
.api-endpoint-method.post { background: #dbeafe; color: #1e40af; }

.api-endpoint-path {
  font-family: ui-monospace, monospace;
  font-size: 0.9375rem;
}

.api-endpoint-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 12px 0 0;
  line-height: 1.5;
}

.api-code-block {
  margin-top: 12px;
  padding: 16px;
  background: var(--color-footer-bg);
  color: var(--color-footer-text-bright);
  border-radius: var(--radius);
  font-family: ui-monospace, monospace;
  font-size: 0.8125rem;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

.api-docs-content code {
  padding: 2px 6px;
  background: var(--color-bg-alt);
  border-radius: 4px;
  font-family: ui-monospace, monospace;
  font-size: 0.875em;
}

@media (max-width: 1024px) {
  .res-article-grid { grid-template-columns: repeat(2, 1fr); }
  .res-whitepaper-grid { grid-template-columns: 1fr; }
  .api-docs-layout { grid-template-columns: 1fr; }
  .api-docs-nav { position: static; }
}

@media (max-width: 768px) {
  .res-article-grid { grid-template-columns: 1fr; }
}

/* 技术架构子页：细化版 */
.page-content-architecture .arch-hero {
  margin-bottom: 40px;
}

.page-content-architecture .arch-hero .lead {
  margin-bottom: 20px;
}

.arch-lead-points {
  margin: 0;
  padding-left: 1.35em;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.arch-lead-points li {
  margin-bottom: 8px;
}

.arch-lead-points li::marker {
  color: var(--color-gold);
}

/* 两栏：主内容 + 侧边卡片 */
.arch-two-col {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
  margin-bottom: 48px;
}

.arch-two-col-main {
  min-width: 0;
}

.page-content-architecture .arch-section-title {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-text);
}

.page-content-architecture .arch-two-col + .arch-section-title {
  margin-top: 48px;
}

.page-content-architecture .arch-section-desc {
  margin: 0 0 24px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.arch-flow {
  max-width: 100%;
  margin: 0 0 20px;
  padding: 24px 20px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
}

.arch-flow-step {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px 12px;
  flex-wrap: wrap;
}

.arch-flow-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-gold);
  background: var(--color-primary-light);
  border-radius: 50%;
  flex-shrink: 0;
}

.arch-flow-node {
  display: inline-block;
  padding: 10px 16px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.arch-flow-node-sub {
  color: var(--color-text-muted);
  font-weight: 400;
  font-size: 0.875rem;
}

.arch-flow-arrow {
  color: var(--color-gold);
  font-weight: 600;
  font-size: 1rem;
  flex-shrink: 0;
}

.arch-flow-connector {
  width: 2px;
  height: 18px;
  margin: 4px auto;
  background: linear-gradient(to bottom, var(--color-border), var(--color-gold));
  opacity: 0.6;
}

.arch-flow-step-single .arch-flow-node {
  flex: 1;
  min-width: 0;
  text-align: center;
}

.arch-flow-step-wide {
  justify-content: center;
}

.arch-flow-note {
  padding: 16px 20px;
  background: var(--color-bg-pure);
  border-left: 4px solid var(--color-gold);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.arch-flow-note p {
  margin: 0;
}

.arch-flow-note strong {
  color: var(--color-text);
}

/* 侧边卡片 */
.arch-two-col-aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.arch-card {
  padding: 20px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.arch-card-title {
  margin: 0 0 12px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.arch-card-list {
  margin: 0;
  padding-left: 1.2em;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.arch-card-list li {
  margin-bottom: 10px;
}

.arch-card-list li:last-child {
  margin-bottom: 0;
}

.arch-card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.arch-card-visual {
  padding: 0;
  overflow: hidden;
  border-radius: var(--radius);
}

.arch-card-visual img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
}

.arch-card-caption {
  padding: 10px 14px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-subtle);
}

/* 对比表 */
.arch-compare-wrap {
  margin-bottom: 20px;
  overflow-x: auto;
}

.arch-compare-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 0.9375rem;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.arch-compare-table th,
.arch-compare-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--color-border-subtle);
  vertical-align: top;
}

.arch-compare-table tbody tr:nth-child(even) td:not(.arch-compare-col-highlight) {
  background: rgba(0, 0, 0, 0.02);
}

.arch-compare-table thead th {
  background: var(--color-bg-alt);
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.875rem;
}

.arch-compare-table .arch-compare-dim {
  width: 12%;
  min-width: 88px;
  color: var(--color-text);
}

.arch-dim-label {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius);
  background: var(--color-bg-alt);
  color: var(--color-text);
  border-left: 3px solid var(--color-border);
}

.arch-dim-quality { border-left-color: #3b82f6; }
.arch-dim-consistency { border-left-color: var(--color-gold); }
.arch-dim-security { border-left-color: #059669; }

.arch-compare-table .arch-compare-col {
  width: 44%;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.arch-compare-table .arch-compare-col-highlight {
  background: rgba(201, 169, 98, 0.06);
  color: var(--color-text);
  border-left: 3px solid var(--color-gold);
}

.arch-compare-table tbody tr:last-child td {
  border-bottom: none;
}

.arch-compare-table tbody tr:hover .arch-compare-col-highlight {
  background: rgba(201, 169, 98, 0.1);
}

.arch-compare-summary {
  margin: 0 0 40px;
  padding: 18px 22px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.arch-cta-block {
  text-align: center;
  padding: 32px 24px;
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
}

.arch-cta-block p {
  margin: 0 0 16px;
  font-size: 1rem;
  color: var(--color-text);
}

@media (max-width: 900px) {
  .arch-two-col {
    grid-template-columns: 1fr;
  }
  .arch-two-col-aside {
    order: -1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
  }
  .arch-card-visual {
    grid-column: 1 / -1;
  }
}

@media (max-width: 600px) {
  .arch-two-col-aside {
    grid-template-columns: 1fr;
  }
  .arch-flow-step {
    flex-direction: column;
    align-items: stretch;
  }
  .arch-flow-step-single .arch-flow-node {
    width: auto;
  }
}

/* ================================================================
   NEW HOMEPAGE DESIGN - Mema.AI Multi-Agent OS Style
   ================================================================ */

/* --- Accent text utility (Make.com style: solid purple, no gradient) --- */
.text-gradient {
  color: var(--color-primary);
  -webkit-text-fill-color: var(--color-primary);
}

/* --- Interactive Demo Card (Hero Right) --- */
.demo-card {
  position: relative;
  z-index: 10;
}

.demo-card-glow {
  position: absolute;
  inset: 0;
  background: var(--color-primary);
  border-radius: var(--radius-xl);
  transform: rotate(3deg) scale(1.05);
  opacity: 0.12;
  filter: blur(24px);
  z-index: -1;
}

.demo-card-inner {
  background: var(--color-bg-pure);
  border-radius: var(--radius-xl);
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.1), 0 4px 12px rgba(15, 23, 42, 0.06);
  border: 1px solid var(--color-border);
  overflow: hidden;
  position: relative;
}

.demo-card-toolbar {
  background: var(--color-bg-alt);
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.demo-card-dots {
  display: flex;
  gap: 6px;
}

.demo-card-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.demo-card-dot--red { background: #ef4444; }
.demo-card-dot--yellow { background: #f59e0b; }
.demo-card-dot--green { background: #22c55e; }

.demo-card-toolbar-title {
  margin-left: 16px;
  font-size: 0.75rem;
  font-family: monospace;
  color: var(--color-text-muted);
}

.demo-card-body {
  padding: 24px;
}

.demo-card-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 8px;
  display: block;
}

.demo-card-input-row {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}

.demo-card-input {
  flex: 1;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--color-text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.demo-card-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.demo-card-run-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 20px;
  background: var(--color-secondary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}

.demo-card-run-btn:hover {
  background: #1e293b;
}

.demo-card-run-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.demo-card-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  min-height: 300px;
}

/* --- Agent Status List --- */
.agent-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
  max-height: 320px;
}

.agent-list::-webkit-scrollbar {
  width: 4px;
}
.agent-list::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 20px;
}

.agent-status {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius);
  transition: all 0.5s var(--ease-out);
  opacity: 0.5;
  filter: grayscale(1);
}

.agent-status.is-active {
  background: var(--color-bg-pure);
  box-shadow: var(--shadow-lg);
  transform: scale(1.03);
  opacity: 1;
  filter: none;
  border-left: 4px solid var(--agent-color, var(--color-primary));
}

.agent-status.is-done {
  opacity: 0.8;
  filter: none;
}

.agent-status-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  transition: background 0.3s, color 0.3s;
}

.agent-status.is-active .agent-status-icon {
  background: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
}

.agent-status.is-done .agent-status-icon {
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
}

.agent-status-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.agent-status.is-active .agent-status-label {
  color: var(--color-text);
}

.agent-status-spinner {
  margin-left: auto;
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: agentSpin 0.8s linear infinite;
}

@keyframes agentSpin {
  to { transform: rotate(360deg); }
}

/* --- Demo Live Output --- */
.demo-output-panel {
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--color-border);
  padding: 16px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.demo-output-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  gap: 8px;
}

.demo-output-empty svg {
  opacity: 0.2;
}

.demo-output-processing {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.demo-output-spinner-ring {
  position: relative;
  width: 64px;
  height: 64px;
  margin-bottom: 16px;
}

.demo-output-spinner-ring::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 4px solid rgba(var(--color-primary-rgb), 0.15);
  border-radius: 50%;
}

.demo-output-spinner-ring::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 4px solid transparent;
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: agentSpin 1s linear infinite;
}

.demo-output-step-label {
  font-size: 0.75rem;
  font-family: monospace;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 4px 10px;
  border-radius: 4px;
}

.demo-output-results {
  flex: 1;
  overflow-y: auto;
  animation: fadeInUp 0.7s var(--ease-out);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.demo-result-badge {
  font-size: 0.75rem;
  font-weight: 700;
  color: #16a34a;
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 12px;
}

.demo-result-card {
  background: var(--color-bg-pure);
  padding: 16px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
  transition: box-shadow 0.2s;
}

.demo-result-card:hover {
  box-shadow: var(--shadow-md);
}

.demo-result-card + .demo-result-card {
  margin-top: 12px;
}

.demo-result-card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.demo-result-card-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.demo-result-card-icon--ig { background: #fce7f3; color: #ec4899; }
.demo-result-card-icon--video { background: #ede9fe; color: #8b5cf6; }
.demo-result-card-icon--email { background: #dbeafe; color: #3b82f6; }

.demo-result-card-platform {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.demo-result-card-visual {
  width: 100%;
  height: 80px;
  border-radius: var(--radius);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
}

.demo-result-card-text {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.demo-result-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.demo-result-card-tag {
  font-size: 0.625rem;
  padding: 2px 8px;
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
}

/* --- Stats Strip --- */
.stats-strip {
  padding: 40px 0;
  background: var(--color-bg-pure);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stats-strip-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  text-align: center;
}

.stats-strip-inner > div {
  padding: 16px 0;
}

.stats-strip-inner > div + div {
  border-left: 1px solid var(--color-border);
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

/* --- Core Capabilities (3 Cards) --- */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.capability-card {
  background: var(--color-bg-pure);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 32px;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

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

.capability-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: #fff;
}

.capability-card-icon--brand { background: linear-gradient(135deg, #ec4899, #f43f5e); }
.capability-card-icon--video { background: linear-gradient(135deg, #9b40e8, #6d00cc); }
.capability-card-icon--agents { background: linear-gradient(135deg, #10b981, #14b8a6); }

.capability-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 12px;
}

.capability-card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin: 0;
}

/* --- Architecture Section (Dark) --- */
.section-arch-dark {
  padding: 96px 0;
  background: #0f172a;
  color: #fff;
  overflow: hidden;
  position: relative;
}

.section-arch-dark::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image: 
    linear-gradient(#6d00cc 1px, transparent 1px),
    linear-gradient(to right, #6d00cc 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.arch-dark-header {
  text-align: center;
  margin-bottom: 64px;
  position: relative;
  z-index: 1;
}

.arch-dark-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  margin: 0 0 16px;
}

.arch-dark-header p {
  color: #94a3b8;
  font-size: 1rem;
}

.arch-dark-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  position: relative;
  z-index: 1;
  flex-wrap: wrap;
}

.arch-dark-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 180px;
}

.arch-dark-col-label {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 8px 16px;
  border-radius: var(--radius);
  text-align: center;
  color: #fff;
  font-family: monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.arch-dark-node {
  background: var(--color-bg-pure);
  padding: 16px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  color: var(--color-text);
}

.arch-dark-node-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
  color: #fff;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.arch-dark-node h4 {
  font-size: 0.875rem;
  font-weight: 700;
  margin: 0 0 2px;
}

.arch-dark-node p {
  font-size: 0.625rem;
  color: var(--color-text-muted);
  margin: 0;
}

.arch-dark-arrow {
  color: #64748b;
  flex-shrink: 0;
}

.arch-dark-center {
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid #334155;
  border-radius: var(--radius-xl);
  padding: 24px;
  position: relative;
  flex: 1;
  max-width: 480px;
}

.arch-dark-center-badge {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-primary);
  color: #fff;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid rgba(109, 0, 204, 0.4);
  box-shadow: 0 4px 16px rgba(109, 0, 204, 0.25);
  white-space: nowrap;
}

.arch-dark-center-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 16px;
  margin-bottom: 24px;
}

.arch-dark-divider {
  border: none;
  border-top: 1px solid #334155;
  margin: 0 0 24px;
  position: relative;
}

.arch-dark-divider-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(30, 41, 59, 0.9);
  padding: 0 12px;
  color: #64748b;
  font-size: 0.75rem;
}

.arch-dark-agents {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.arch-dark-agent-cell {
  background: #334155;
  padding: 10px 8px;
  border-radius: var(--radius);
  text-align: center;
  font-size: 0.75rem;
  color: #fff;
  line-height: 1.3;
}

/* --- Solutions Section (Tabs) --- */
.solutions-tab-toggle {
  display: inline-flex;
  background: var(--color-bg-alt);
  padding: 4px;
  border-radius: var(--radius-full);
  margin-bottom: 48px;
}

.solutions-tab-toggle .tab-btn {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  background: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
}

.solutions-tab-toggle .tab-btn.active {
  background: var(--color-bg-pure);
  color: var(--color-primary);
  box-shadow: var(--shadow);
}

.sol-panel {
  background: var(--color-bg-alt);
  border-radius: var(--radius-xl);
  padding: 48px;
  border: 1px solid var(--color-border);
  display: none;
  animation: fadeInUp 0.5s var(--ease-out);
}

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

.sol-panel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.sol-panel-icon {
  display: inline-flex;
  padding: 12px;
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

.sol-panel-icon--finance { background: #dbeafe; color: #3b82f6; }
.sol-panel-icon--retail { background: #fce7f3; color: #ec4899; }

.sol-panel h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 16px;
}

.sol-panel > div > p {
  color: var(--color-text-muted);
  line-height: 1.65;
  margin: 0 0 32px;
}

.sol-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sol-step {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--color-bg-pure);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
}

.sol-step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.sol-step h4 {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 2px;
}

.sol-step p, .sol-step .sol-step-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin: 0;
}

.sol-step-tags {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.sol-step-tag {
  font-size: 0.625rem;
  padding: 4px 8px;
  background: var(--color-bg-alt);
  border-radius: 4px;
  color: var(--color-text-muted);
}

/* Solution demo preview cards */
.sol-preview {
  background: var(--color-bg-pure);
  border-radius: var(--radius-xl);
  box-shadow: 0 12px 40px rgba(15,23,42,0.12);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.sol-preview-toolbar {
  background: #111827;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sol-preview-dots {
  display: flex;
  gap: 6px;
}

.sol-preview-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.sol-preview-dot--red { background: #ef4444; }
.sol-preview-dot--yellow { background: #f59e0b; }

.sol-preview-toolbar-text {
  font-size: 0.75rem;
  color: #9ca3af;
}

.sol-preview-body {
  padding: 24px;
  background: var(--color-bg-alt);
  min-height: 240px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-text-muted);
}

.sol-preview-footer {
  padding: 16px;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sol-preview-footer-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(34, 197, 94, 0.1);
  color: #16a34a;
}

.sol-preview-footer-text {
  flex: 1;
}

.sol-preview-footer-text strong {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text);
}

.sol-preview-footer-text span {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.sol-preview-footer .btn-small {
  padding: 8px 16px;
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
}

/* --- Responsive for new components --- */
@media (max-width: 1024px) {
  .demo-card-main {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .arch-dark-flow {
    flex-direction: column;
  }
  .arch-dark-col {
    width: 100%;
    max-width: 300px;
  }
  .arch-dark-center {
    max-width: 100%;
  }
  .arch-dark-arrow {
    transform: rotate(90deg);
  }
  .sol-panel-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .capabilities-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .stats-strip-inner {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .stats-strip-inner > div + div {
    border-left: none;
    border-top: 1px solid var(--color-border);
    padding-top: 20px;
    margin-top: 12px;
  }
  .arch-dark-agents {
    grid-template-columns: repeat(2, 1fr);
  }
  .sol-panel {
    padding: 24px;
  }
  .hero-inner {
    padding-top: 40px;
    padding-bottom: 40px;
  }
}

@media (max-width: 480px) {
  .demo-card-input-row {
    flex-direction: column;
  }
}