/* ============================================
   上海恒耐建设发展有限公司 - 官方网站
   HengNai Construction - Official Website
   主色调：Logo 蓝(#1A3A8A) + 白 + 灰
   ============================================ */

/* ---------- CSS 变量 ---------- */
:root {
  /* 蓝色系（基于 logo #1A3A8A） */
  --color-primary: #1A3A8A;        /* 主蓝 */
  --color-primary-dark: #122965;   /* 深蓝（hover / 强调） */
  --color-primary-light: #2E55A8;  /* 中蓝 */
  --color-accent: #3B6FD3;         /* 亮蓝点缀 */
  --color-blue-50: #EEF2F9;
  --color-blue-100: #D8E2F1;
  --color-blue-200: #B0C5E3;

  /* 灰色系 */
  --color-gray-900: #0F172A;
  --color-gray-800: #1F2937;
  --color-gray-700: #374151;
  --color-gray-600: #4B5563;
  --color-gray-500: #6B7280;
  --color-gray-400: #9CA3AF;
  --color-gray-300: #D1D5DB;
  --color-gray-200: #E5E7EB;
  --color-gray-100: #F3F4F6;
  --color-gray-50:  #F9FAFB;

  /* 基础色 */
  --color-white: #FFFFFF;
  --color-bg: #FAFBFC;
  --color-border: #E5E7EB;

  /* 状态色 */
  --color-success: #10B981;
  --color-warning: #F59E0B;

  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, .05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, .08), 0 2px 4px -2px rgba(15, 23, 42, .04);
  --shadow-lg: 0 10px 25px -3px rgba(15, 23, 42, .10), 0 4px 6px -4px rgba(15, 23, 42, .05);
  --shadow-xl: 0 20px 50px -12px rgba(26, 58, 138, .25);

  /* 字体 */
  --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
  --font-display: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;

  /* 容器 */
  --container-max: 1280px;
  --container-padding: 24px;

  /* 动画 */
  --transition: all .25s cubic-bezier(.4,0,.2,1);
  --transition-slow: all .4s cubic-bezier(.4,0,.2,1);
}

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

/* 防止 i18n 加载前显示原始 key（FOUC） */
body:not(.i18n-ready):not(.i18n-failed) {
  opacity: 0;
}
body.i18n-ready {
  opacity: 1;
  transition: opacity .25s ease-out;
}
body.i18n-failed {
  opacity: 1;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-gray-800);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul, ol { list-style: none; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

/* ---------- 通用 ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: 80px 0;
}

.section--gray { background: var(--color-gray-50); }
.section--blue { background: var(--color-blue-50); }

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

.section-title__eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.section-title__heading {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-title__desc {
  font-size: 17px;
  color: var(--color-gray-600);
  max-width: 720px;
  margin: 0 auto;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition);
  white-space: nowrap;
  cursor: pointer;
}

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

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn--outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn--white {
  background: var(--color-white);
  color: var(--color-primary);
}
.btn--white:hover {
  background: var(--color-gray-100);
  color: var(--color-primary);
}

.btn--ghost-white {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255,255,255,.5);
}
.btn--ghost-white:hover {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

/* ---------- 顶部导航 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

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

.header__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  color: var(--color-primary);
}

.header__logo-img {
  height: 50px;
  width: auto;
  display: block;
  flex-shrink: 0;
}

/* Header 品牌区：LOGO + 公司名 */
.header__logo-text {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  white-space: nowrap;
  letter-spacing: .3px;
}

/* Header brand 区域：LOGO + 公司中英名 */
.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__link {
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-gray-700);
  border-radius: var(--radius-md);
  position: relative;
}

.nav__link:hover {
  color: var(--color-primary);
  background: var(--color-blue-50);
}

.nav__link--active {
  color: var(--color-primary);
  background: var(--color-blue-50);
}

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--color-primary);
}

/* 语言切换 */
.lang-switch {
  display: inline-flex;
  align-items: center;
  background: var(--color-gray-100);
  border-radius: 999px;
  padding: 3px;
  margin-left: 16px;
  border: 1px solid var(--color-border);
}
.lang-switch__btn {
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-gray-600);
  border-radius: 999px;
  transition: var(--transition);
  letter-spacing: .5px;
}
.lang-switch__btn--active {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}
.lang-switch__btn:hover:not(.lang-switch__btn--active) {
  color: var(--color-primary);
}

/* 移动端汉堡 */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-gray-700);
}
.menu-toggle:hover { background: var(--color-gray-100); }
.menu-toggle span {
  width: 22px;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: var(--transition);
}
.menu-toggle span::before,
.menu-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: currentColor;
  transition: var(--transition);
}
.menu-toggle span::before { top: -7px; }
.menu-toggle span::after { top: 7px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  background:
    linear-gradient(135deg, rgba(26, 58, 138, .92) 0%, rgba(18, 41, 101, .85) 100%),
    radial-gradient(circle at 80% 30%, rgba(59, 111, 211, .4) 0%, transparent 60%),
    linear-gradient(180deg, #0F1F4D 0%, #1A3A8A 100%);
  color: var(--color-white);
  overflow: hidden;
  padding: 100px 0 80px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 60px;
  align-items: center;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .5px;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}
.hero__eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ADE80;
  box-shadow: 0 0 8px #4ADE80;
}

.hero__title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.5px;
  margin-bottom: 24px;
}
.hero__title em {
  font-style: normal;
  background: linear-gradient(135deg, #93C5FD 0%, #FFFFFF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 19px;
  line-height: 1.7;
  color: rgba(255,255,255,.85);
  margin-bottom: 36px;
  max-width: 560px;
}

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

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,.15);
  max-width: 560px;
}

.hero__stat-num {
  font-size: 32px;
  font-weight: 800;
  background: linear-gradient(135deg, #FFFFFF 0%, #93C5FD 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}
.hero__stat-label {
  font-size: 13px;
  color: rgba(255,255,255,.7);
  letter-spacing: .5px;
}

.hero__visual {
  position: relative;
  height: 480px;
  background: rgba(255,255,255,.05);
  border-radius: var(--radius-2xl);
  border: 1px solid rgba(255,255,255,.1);
  backdrop-filter: blur(10px);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__visual-inner {
  width: 100%;
  height: 100%;
  position: relative;
}

/* Hero 内 SVG 装饰 */
.hero__icon-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  padding: 40px;
}
.hero__icon-card {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  transition: var(--transition);
}
.hero__icon-card:hover {
  background: rgba(255,255,255,.12);
  transform: translateY(-4px);
}
.hero__icon-card svg {
  width: 36px;
  height: 36px;
  color: #93C5FD;
}
.hero__icon-card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-white);
}
.hero__icon-card-desc {
  font-size: 12px;
  color: rgba(255,255,255,.65);
}

/* ---------- 通用页面头 ---------- */
.page-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  padding: 80px 0 64px;
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 40px 40px;
}
.page-header__inner {
  position: relative;
  text-align: center;
}
.page-header__title {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 12px;
}
.page-header__subtitle {
  font-size: 16px;
  opacity: .85;
}
.breadcrumb-nav {
  display: inline-flex;
  gap: 8px;
  margin-top: 16px;
  font-size: 13px;
  color: rgba(255,255,255,.7);
}
.breadcrumb-nav a { color: rgba(255,255,255,.85); }
.breadcrumb-nav a:hover { color: white; }
.breadcrumb-nav__sep { opacity: .6; }

/* ---------- 卡片网格 ---------- */
.grid {
  display: grid;
  gap: 28px;
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(380px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* 产品卡 */
.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-blue-200);
}

.product-card__media {
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--color-blue-50) 0%, var(--color-blue-100) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.product-card__media svg {
  width: 50%;
  height: 50%;
  color: var(--color-primary);
}
.product-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s cubic-bezier(.4,0,.2,1);
}
.product-card:hover .product-card__media img {
  transform: scale(1.08);
}
.product-card__media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 60%, rgba(255,255,255,.3) 100%);
  pointer-events: none;
}

.product-card__body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-card__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 10px;
}
.product-card__desc {
  font-size: 14px;
  color: var(--color-gray-600);
  line-height: 1.6;
  flex: 1;
}
.product-card__footer {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-gray-100);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.product-card__tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  background: var(--color-blue-50);
  color: var(--color-primary);
  border-radius: 999px;
}
.product-card__link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.product-card__link:hover { gap: 8px; }

/* 案例卡 */
.case-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  cursor: pointer;
  background: var(--color-gray-200);
  transition: var(--transition);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); }
.case-card__media {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.case-card__media svg {
  width: 40%;
  color: var(--color-primary);
  opacity: .7;
}
.case-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s cubic-bezier(.4,0,.2,1);
}
.case-card:hover .case-card__media img {
  transform: scale(1.08);
}
.case-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(15, 31, 77, .95) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  color: var(--color-white);
  transition: var(--transition-slow);
  z-index: 2;
}
.case-card__overlay h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}
.case-card__overlay p {
  font-size: 13px;
  color: rgba(255,255,255,.75);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.case-card:hover .case-card__overlay {
  background: linear-gradient(180deg, rgba(26, 58, 138, .4) 0%, rgba(15, 31, 77, .98) 100%);
}

/* ---------- 关于页 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-grid--reverse { direction: rtl; }
.about-grid--reverse > * { direction: ltr; }

.about-visual {
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-2xl);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-xl);
}
.about-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px);
  background-size: 40px 40px;
}
.about-visual__svg {
  position: relative;
  z-index: 2;
  color: white;
}
.about-visual__badge {
  position: absolute;
  bottom: 24px;
  right: 24px;
  background: var(--color-white);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 3;
}
.about-visual__badge-num {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}
.about-visual__badge-label {
  font-size: 12px;
  color: var(--color-gray-600);
  margin-top: 4px;
}

.about-content h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 20px;
  line-height: 1.2;
}
.about-content h2 + .eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
  display: block;
}
.about-content p {
  font-size: 16px;
  color: var(--color-gray-600);
  margin-bottom: 16px;
  line-height: 1.8;
}
.about-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 32px;
}
.about-feature {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.about-feature__icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: var(--color-blue-50);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}
.about-feature__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 4px;
}
.about-feature__desc {
  font-size: 13px;
  color: var(--color-gray-600);
}

/* ---------- 合作伙伴 logo ---------- */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
}
.partner-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 110px;
  transition: var(--transition);
}
.partner-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.partner-card__name {
  text-align: center;
  font-weight: 600;
  color: var(--color-gray-700);
  font-size: 15px;
  line-height: 1.3;
}
.partner-card__name small {
  display: block;
  font-weight: 400;
  color: var(--color-gray-500);
  font-size: 12px;
  margin-top: 4px;
}

/* ---------- 联系信息 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
}
.contact-info {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 36px;
}
.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-gray-100);
}
.contact-info__item:last-child { border-bottom: 0; }
.contact-info__icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-info__label {
  font-size: 12px;
  color: var(--color-gray-500);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}
.contact-info__value {
  font-size: 15px;
  color: var(--color-gray-900);
  font-weight: 500;
}
.contact-info__value a { color: var(--color-gray-900); }
.contact-info__value a:hover { color: var(--color-primary); }

/* ---------- 表单 ---------- */
.form {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 36px;
}
.form__title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 8px;
}
.form__desc {
  font-size: 14px;
  color: var(--color-gray-600);
  margin-bottom: 28px;
}
.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.form__group {
  display: flex;
  flex-direction: column;
  margin-bottom: 16px;
}
.form__label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: 6px;
}
.form__label--required::after {
  content: ' *';
  color: #DC2626;
}
.form__input,
.form__textarea,
.form__select {
  width: 100%;
  padding: 11px 14px;
  font-size: 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
  color: var(--color-gray-900);
  transition: var(--transition);
}
.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 58, 138, .1);
}
.form__textarea {
  min-height: 130px;
  resize: vertical;
  font-family: inherit;
}
.form__submit {
  width: 100%;
  margin-top: 8px;
  padding: 14px;
  font-size: 15px;
}

/* ---------- CTA 区 ---------- */
.cta {
  background:
    linear-gradient(135deg, rgba(26, 58, 138, .95) 0%, rgba(18, 41, 101, .95) 100%),
    radial-gradient(circle at 20% 80%, rgba(59, 111, 211, .4) 0%, transparent 50%);
  color: var(--color-white);
  padding: 72px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 40px 40px;
}
.cta__inner {
  position: relative;
}
.cta h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
}
.cta p {
  font-size: 17px;
  opacity: .85;
  max-width: 640px;
  margin: 0 auto 32px;
}
.cta__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: 64px 0 24px;
}
.footer__top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer__brand-name {
  color: var(--color-white);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer__brand-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-400);
  margin-bottom: 24px;
  max-width: 360px;
}
.footer__contact-line {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--color-gray-400);
  margin-bottom: 8px;
}
.footer__contact-line svg { color: var(--color-accent); flex-shrink: 0; }

.footer__col-title {
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: .5px;
  text-transform: uppercase;
}
.footer__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer__links a {
  font-size: 14px;
  color: var(--color-gray-400);
  transition: var(--transition);
}
.footer__links a:hover {
  color: var(--color-white);
  padding-left: 4px;
}

.footer__bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--color-gray-500);
}
.footer__bottom a { color: var(--color-gray-400); }
.footer__bottom a:hover { color: var(--color-white); }

/* ---------- 动画 ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-up {
  animation: fadeUp .6s cubic-bezier(.4,0,.2,1) both;
}

/* 滚动渐入：默认可见（避免 FOUC） */
.reveal { opacity: 1; transform: none; transition: opacity .6s ease, transform .6s ease; }
/* JS 启动后才会进入 armed 模式并隐藏 reveal */
.reveal-armed .reveal:not(.is-visible) {
  opacity: 0;
  transform: translateY(20px);
}