/* ============================================================
   CloudComms — 云通讯 SaaS 企业站 主样式
   设计基调：白色+浅灰+天蓝+绿 ｜ 亮色为主 通透清新
   排版：大留白 ｜ 大圆角 ｜ 纯白卡片+极轻阴影
   字体：Inter (Google Fonts) — 现代几何无衬线体
   架构：第三方模板模式 ({pboot:sitedomain}/skin/)
   依赖：Font Awesome 6 / Swiper 11 / AOS 2.3.4
   ============================================================ */

/* Google Fonts: Inter — 现代几何无衬线体 */


/* ===== CSS 变量 ===== */
:root {
  /* 主色系 */
  --c-white: #ffffff;
  --c-bg: #F5F7FA;
  --c-bg-alt: #EEF1F5;
  --c-blue: #4F9CF7;
  --c-blue-dark: #3B82F6;
  --c-blue-light: #EFF6FF;
  --c-green: #10B981;
  --c-green-dark: #059669;
  --c-green-light: #ECFDF5;

  /* 文字 */
  --text: #1a1a2e;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --text-inverse: #ffffff;

  /* 边框与阴影 */
  --border: #E5E7EB;
  --border-light: #F3F4F6;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.04), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,.06), 0 1px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.04);
  --shadow-xl: 0 24px 56px rgba(0,0,0,.12);

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* 间距 */
  --header-h: 72px;
  --container-max: 1200px;
  --section-py: 88px;

  /* 动效 */
  --ease-out: cubic-bezier(.4,0,.2,1);
  --ease-in-out: cubic-bezier(.4,0,.2,1);
  --duration-fast: .2s;
  --duration-normal: .3s;
  --duration-slow: .5s;

  /* 字体 — Inter 现代几何无衬线体 */
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", "Fira Mono", "Cascadia Code", monospace;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--c-white);
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { border: none; cursor: pointer; font-family: inherit; }
input, textarea { font-family: inherit; }

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

/* ===== Section 通用 ===== */
.section { padding: var(--section-py) 0; }
.section--bg { background: var(--c-bg); }
.section--alt { background: var(--c-bg-alt); }
.section--tight { padding: 60px 0; }

/* Section 头部 */
.section__header { text-align: center; margin-bottom: 56px; }
.section__tag {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--c-blue);
  background: var(--c-blue-light);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}
.section__title {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.02em;
  line-height: 1.25;
  margin-bottom: 8px;
}
.section__subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: .95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
  cursor: pointer;
  border: 2px solid transparent;
}
.btn--primary {
  background: var(--c-blue);
  color: #fff;
  border-color: var(--c-blue);
}
.btn--primary:hover {
  background: var(--c-blue-dark);
  border-color: var(--c-blue-dark);
  box-shadow: 0 4px 16px rgba(79,156,247,.35);
  transform: translateY(-1px);
}
.btn--green {
  background: var(--c-green);
  color: #fff;
  border-color: var(--c-green);
}
.btn--green:hover {
  background: var(--c-green-dark);
  border-color: var(--c-green-dark);
  box-shadow: 0 4px 16px rgba(16,185,129,.35);
  transform: translateY(-1px);
}
.btn--outline {
  background: transparent;
  color: var(--c-blue);
  border-color: var(--c-blue);
}
.btn--outline:hover {
  background: var(--c-blue-light);
  transform: translateY(-1px);
}
.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}
.btn--ghost:hover { color: var(--c-blue); }
.btn--lg { padding: 15px 36px; font-size: 1rem; }
.btn--sm { padding: 8px 18px; font-size: .85rem; }
.btn .fa-arrow-right { transition: transform var(--duration-fast); }
.btn:hover .fa-arrow-right { transform: translateX(4px); }

/* ===== Header (白色实底+深色文字) ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow var(--duration-normal) var(--ease-out);
}
.header.scrolled { box-shadow: var(--shadow-md); }
.header__inner {
  display: flex;
  align-items: center;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  margin-right: 40px;
}
.header__logo-icon {
  width: 40px;
  height: 40px;
  background: var(--c-blue);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: #fff;
}
.header__logo-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.01em;
}
.header__nav { display: flex; align-items: center; gap: 4px; }
.header__nav-link {
  padding: 8px 14px;
  font-size: .92rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast);
  white-space: nowrap;
  font-weight: 500;
}
.header__nav-link:hover,
.header__nav-link.active { color: var(--c-blue); background: var(--c-blue-light); }
.header__nav-item { position: relative; }
.header__nav-item:hover .header__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.header__dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 180px;
  padding: 8px 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all var(--duration-fast) var(--ease-out);
  z-index: 60;
}
.header__dropdown a {
  display: block;
  padding: 10px 20px;
  font-size: .88rem;
  color: var(--text-secondary);
  transition: all var(--duration-fast);
}
.header__dropdown a:hover { color: var(--c-blue); background: var(--c-blue-light); }
.header__actions { display: flex; align-items: center; gap: 12px; margin-left: auto; }

/* ===== 汉堡菜单 (独立于 actions) ===== */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  padding: 8px;
  cursor: pointer;
  z-index: 101;
  margin-left: 16px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--duration-fast);
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== 移动端导航 ===== */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -300px;
  width: 280px;
  height: 100vh;
  background: #fff;
  z-index: 200;
  padding: 24px;
  box-shadow: var(--shadow-xl);
  transition: right var(--duration-normal) var(--ease-out);
  overflow-y: auto;
}
.mobile-nav.open { right: 0; }
.mobile-nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  z-index: 199;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal);
}
.mobile-nav__overlay.show { opacity: 1; visibility: visible; }
.mobile-nav__link {
  display: block;
  padding: 12px 16px;
  font-size: .95rem;
  color: var(--text);
  border-radius: var(--radius-sm);
  margin-bottom: 2px;
  transition: all var(--duration-fast);
}
.mobile-nav__link:hover { background: var(--c-blue-light); color: var(--c-blue); }
.mobile-nav__sub { display: none; padding-left: 16px; margin-bottom: 8px; }
.mobile-nav__sub.open { display: block; }
.mobile-nav__sub a {
  display: block;
  padding: 10px 16px;
  font-size: .9rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}

/* ===== Hero/Banner ===== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 620px;
  max-height: 820px;
  overflow: hidden;
  background: var(--text);
}
.hero-swiper { position: absolute; inset: 0; z-index: 1; }
.hero-swiper .swiper-slide {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(135deg, rgba(15,23,42,.65) 0%, rgba(15,23,42,.35) 50%, rgba(15,23,42,.55) 100%);
}
.hero__content {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  padding: 0 24px;
  color: #fff;
}
.hero__title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.15;
  margin-bottom: 20px;
  max-width: 720px;
}
.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,.8);
  margin-bottom: 36px;
  max-width: 560px;
  line-height: 1.6;
}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.hero__actions .btn--outline { border-color: rgba(255,255,255,.5); color: #fff; }
.hero__actions .btn--outline:hover { border-color: #fff; background: rgba(255,255,255,.1); }
.hero-pagination {
  position: absolute;
  bottom: 40px;
  z-index: 4;
  display: flex;
  justify-content: center;
  gap: 10px;
}
.hero-pagination .swiper-pagination-bullet {
  width: 10px; height: 10px;
  background: rgba(255,255,255,.4);
  opacity: 1;
  border-radius: 50%;
  transition: all var(--duration-fast);
}
.hero-pagination .swiper-pagination-bullet-active { background: #fff; width: 28px; border-radius: 5px; }
.hero__scroll-indicator {
  position: absolute;
  bottom: 90px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.6);
  font-size: .7rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  animation: fadeInUp 2s ease infinite;
}
.hero__scroll-line {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, rgba(255,255,255,.6), transparent);
}

@keyframes fadeInUp {
  0%, 100% { opacity: .5; transform: translateX(-50%) translateY(0); }
  50% { opacity: 1; transform: translateX(-50%) translateY(-6px); }
}

/* ===== 内页 Banner ===== */
.inner-banner {
  position: relative;
  height: 320px;
  overflow: hidden;
  margin-top: var(--header-h);
  background: var(--text);
}
.inner-banner__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.inner-banner__overlay {
  position: absolute;
  inset: 0;
  background: rgba(15,23,42,.55);
}
.inner-banner__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: #fff;
  text-align: center;
}
.inner-banner__title { font-size: 2.2rem; font-weight: 700; margin-bottom: 8px; }
.inner-banner__subtitle { font-size: 1rem; color: rgba(255,255,255,.75); }

/* ===== 面包屑 ===== */
.breadcrumb-bar {
  background: var(--c-bg);
  border-bottom: 1px solid var(--border-light);
  padding: 14px 0;
}
.breadcrumb { font-size: .88rem; color: var(--text-muted); }
.breadcrumb a { color: var(--text-secondary); transition: color var(--duration-fast); }
.breadcrumb a:hover { color: var(--c-blue); }
.breadcrumb i { margin: 0 6px; font-size: .65rem; }

/* ===== 三列卡片网格 ===== */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--duration-normal) var(--ease-out);
  text-align: center;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--c-blue);
}
.feature-card__icon {
  width: 56px;
  height: 56px;
  background: var(--c-blue-light);
  color: var(--c-blue);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin: 0 auto 20px;
}
.feature-card__title { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; }
.feature-card__desc { font-size: .92rem; color: var(--text-secondary); line-height: 1.7; }

/* ===== 数据统计 ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-item { padding: 32px 20px; }
.stat-item__number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -.02em;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-item__label { font-size: .95rem; color: var(--text-secondary); }

/* ===== 内容列表网格 ===== */
.list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.list-grid--4 { grid-template-columns: repeat(4, 1fr); }
.list-grid--2 { grid-template-columns: repeat(2, 1fr); }

/* ===== 产品/案例/新闻卡片 ===== */
.card {
  display: block;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border);
}
.card__image {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--c-bg);
}
.card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}
.card:hover .card__image img { transform: scale(1.05); }
.card__body { padding: 22px 20px; }
.card__tag {
  display: inline-block;
  font-size: .75rem;
  font-weight: 600;
  color: var(--c-blue);
  background: var(--c-blue-light);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 10px;
}
.card__title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card__desc {
  font-size: .88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card__meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
  font-size: .82rem;
  color: var(--text-muted);
}
.card__meta i { margin-right: 4px; }

/* ===== 新闻列表 (左右交替) ===== */
.news-list { display: flex; flex-direction: column; gap: 20px; }
.news-item {
  display: flex;
  gap: 24px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all var(--duration-fast);
}
.news-item:hover { box-shadow: var(--shadow-md); border-color: var(--border); }
.news-item__image {
  flex-shrink: 0;
  width: 260px;
  height: 180px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--c-bg);
}
.news-item__image img { width: 100%; height: 100%; object-fit: cover; }
.news-item__body { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.news-item__title { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
.news-item__desc { font-size: .9rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 12px; }
.news-item__info { font-size: .82rem; color: var(--text-muted); }

/* ===== 详情页 ===== */
.detail { max-width: 900px; margin: 0 auto; }
.detail__title { font-size: 2rem; font-weight: 700; margin-bottom: 16px; line-height: 1.3; }
.detail__meta {
  display: flex;
  gap: 20px;
  font-size: .88rem;
  color: var(--text-muted);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 32px;
}
.detail__body { line-height: 1.9; font-size: 1rem; color: var(--text); }
.detail__body img { border-radius: var(--radius-md); margin: 24px 0; }
.detail__body p { margin-bottom: 16px; }
.detail__body h2, .detail__body h3 { margin: 32px 0 16px; }
.detail__prev-next { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border-light); display: flex; justify-content: space-between; font-size: .92rem; }
.detail__prev-next a { color: var(--text-secondary); transition: color var(--duration-fast); }
.detail__prev-next a:hover { color: var(--c-blue); }

/* ===== 产品详情 ===== */
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; max-width: 1100px; margin: 0 auto; }
.product-detail__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-bg);
  aspect-ratio: 4/3;
}
.product-detail__image img { width: 100%; height: 100%; object-fit: cover; }
.product-detail__info { display: flex; flex-direction: column; justify-content: center; }
.product-detail__title { font-size: 1.8rem; font-weight: 700; margin-bottom: 12px; }
.product-detail__desc { font-size: 1rem; color: var(--text-secondary); line-height: 1.8; margin-bottom: 24px; }
.product-detail__specs { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.product-detail__spec {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--c-bg);
  border-radius: var(--radius-sm);
  font-size: .9rem;
}
.product-detail__spec i { color: var(--c-green); }
.product-detail__spec strong { margin-right: 4px; }

/* ===== Tab 切换 ===== */
.tabs { display: flex; gap: 4px; border-bottom: 2px solid var(--border-light); margin-bottom: 32px; }
.tab-btn {
  padding: 12px 24px;
  font-size: .95rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--duration-fast);
}
.tab-btn.active { color: var(--c-blue); border-bottom-color: var(--c-blue); }
.tab-btn:hover { color: var(--c-blue); }
.tab-panel { }
.tab-panel.hidden { display: none; }

/* ===== 解决方案卡片 ===== */
.solutions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.solution-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--duration-normal);
  text-align: left;
}
.solution-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--c-green);
}
.solution-card__icon {
  width: 48px;
  height: 48px;
  background: var(--c-green-light);
  color: var(--c-green);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 20px;
}
.solution-card__title { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
.solution-card__desc { font-size: .9rem; color: var(--text-secondary); line-height: 1.7; }

/* ===== 开发者模块 ===== */
.dev-highlights { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.dev-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--duration-normal);
}
.dev-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.dev-card__icon {
  width: 52px;
  height: 52px;
  background: var(--c-bg);
  color: var(--text);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin: 0 auto 16px;
}
.dev-card__title { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
.dev-card__desc { font-size: .88rem; color: var(--text-secondary); line-height: 1.6; }
.dev-card code {
  display: block;
  background: #1e293b;
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: .82rem;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-top: 16px;
  text-align: left;
  overflow-x: auto;
}

/* ===== CTA 区域 ===== */
.cta-section {
  padding: 80px 0;
  text-align: center;
}
.cta-card {
  background: var(--c-bg);
  border: 2px solid var(--c-green);
  border-radius: var(--radius-xl);
  padding: 60px 40px;
  text-align: center;
}
.cta-card__title { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.cta-card__desc { font-size: 1.05rem; color: var(--text-secondary); margin-bottom: 28px; }

/* ===== 品牌墙(Logo展示) ===== */
.brand-wall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.brand-item {
  background: #fff;
  padding: 28px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .95rem;
  font-weight: 500;
  color: var(--text-muted);
  min-height: 80px;
  transition: all var(--duration-fast);
}
.brand-item:hover { color: var(--c-blue); }

/* ===== 产品界面轮播 ===== */
.showcase-swiper { padding: 0 40px; }
.showcase-slide {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 16/10;
  background: var(--c-bg);
}
.showcase-slide img { width: 100%; height: 100%; object-fit: cover; }
.showcase-slide__label {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: rgba(0,0,0,.6);
  backdrop-filter: blur(8px);
  color: #fff;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: .8rem;
}

/* ===== 分页 ===== */
.pagination {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 48px;
}
.pagination a, .pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  font-size: .9rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: all var(--duration-fast);
}
.pagination a:hover { border-color: var(--c-blue); color: var(--c-blue); }
.pagination .current {
  background: var(--c-blue);
  color: #fff;
  border-color: var(--c-blue);
}

/* ===== 无数据 ===== */
.no-data {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 1rem;
}

/* ===== 侧边栏 ===== */
.sidebar-layout { display: grid; grid-template-columns: 260px 1fr; gap: 40px; }
.sidebar { }
.sidebar__title {
  font-size: 1.2rem;
  font-weight: 700;
  padding: 20px;
  background: var(--c-blue);
  color: #fff;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}
.sidebar__nav { background: #fff; border: 1px solid var(--border-light); border-top: none; border-radius: 0 0 var(--radius-md) var(--radius-md); }
.sidebar__nav a {
  display: block;
  padding: 14px 20px;
  font-size: .92rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--duration-fast);
}
.sidebar__nav a:last-child { border-bottom: none; }
.sidebar__nav a:hover,
.sidebar__nav a.active { color: var(--c-blue); background: var(--c-blue-light); }

/* ===== 联系我们 ===== */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info { }
.contact-info h3 { font-size: 1.3rem; margin-bottom: 16px; }
.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}
.contact-info__icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: var(--c-blue-light);
  color: var(--c-blue);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}
.contact-info__text strong { display: block; margin-bottom: 2px; }
.contact-info__text span { font-size: .9rem; color: var(--text-secondary); }
.contact-form { }
.contact-form .form-group { margin-bottom: 16px; }
.contact-form input, .contact-form textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  transition: border-color var(--duration-fast);
  outline: none;
}
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--c-blue); box-shadow: 0 0 0 3px rgba(79,156,247,.1); }
.contact-form textarea { min-height: 140px; resize: vertical; }

/* ===== 搜索 ===== */
.search-form { max-width: 560px; margin: 0 auto 48px; }
.search-form .search-input-wrap {
  display: flex;
  border: 2px solid var(--border);
  border-radius: var(--radius-full);
  overflow: hidden;
  transition: border-color var(--duration-fast);
}
.search-form .search-input-wrap:focus-within { border-color: var(--c-blue); }
.search-form input {
  flex: 1;
  padding: 14px 24px;
  border: none;
  outline: none;
  font-size: 1rem;
}
.search-form button {
  padding: 14px 28px;
  background: var(--c-blue);
  color: #fff;
  font-size: .95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  white-space: nowrap;
}

/* ===== 留言咨询 ===== */
.inquiry-layout { max-width: 680px; margin: 0 auto; }
.inquiry-form .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.inquiry-form .form-group { margin-bottom: 16px; }
.inquiry-form label { display: block; font-size: .9rem; font-weight: 500; margin-bottom: 6px; color: var(--text); }
.inquiry-form input, .inquiry-form select, .inquiry-form textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  outline: none;
  transition: border-color var(--duration-fast);
}
.inquiry-form input:focus, .inquiry-form select:focus, .inquiry-form textarea:focus { border-color: var(--c-blue); box-shadow: 0 0 0 3px rgba(79,156,247,.1); }
.inquiry-form textarea { min-height: 140px; resize: vertical; }

/* ===== Footer ===== */
.footer {
  background: var(--text);
  color: rgba(255,255,255,.65);
  padding: 60px 0 0;
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr 1fr;
  gap: 40px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.footer__brand-desc { font-size: .9rem; line-height: 1.7; margin-bottom: 20px; }
.footer__col-title { font-size: 1rem; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__links a { font-size: .9rem; transition: color var(--duration-fast); }
.footer__links a:hover { color: #fff; }
.footer__contact-item { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; font-size: .88rem; }
.footer__contact-item i { color: var(--c-blue); margin-top: 3px; flex-shrink: 0; }
.footer__social { display: flex; gap: 12px; }
.footer__social a {
  width: 36px; height: 36px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .9rem;
  color: rgba(255,255,255,.5);
  transition: all var(--duration-fast);
}
.footer__social a:hover { border-color: var(--c-blue); color: var(--c-blue); }
.footer__qrcode {
  width: 100px; height: 100px;
  background: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: .7rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  margin-top: 48px;
  padding: 20px 24px;
}
.footer__bottom-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: .85rem;
}
.footer__bottom-inner a { transition: color var(--duration-fast); }
.footer__bottom-inner a:hover { color: var(--c-blue); }

/* ===== 友链区域 ===== */
.friend-links { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; padding: 24px 0; border-top: 1px solid rgba(255,255,255,.06); }
.friend-links__label { font-size: .85rem; color: rgba(255,255,255,.4); white-space: nowrap; }
.friend-links a { font-size: .82rem; color: rgba(255,255,255,.35); transition: color var(--duration-fast); }
.friend-links a:hover { color: rgba(255,255,255,.7); }

/* ===== 在线客服按钮 ===== */
.online-service {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 99;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--c-green);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: 0 6px 24px rgba(16,185,129,.4);
  cursor: pointer;
  transition: all var(--duration-fast);
}
.online-service:hover {
  transform: scale(1.08);
  box-shadow: 0 8px 32px rgba(16,185,129,.5);
}

/* ===== 返回顶部 ===== */
.back-top {
  position: fixed;
  bottom: 96px;
  right: 28px;
  z-index: 98;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .9rem;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--duration-fast);
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { border-color: var(--c-blue); color: var(--c-blue); }

/* ===== 筛选栏 ===== */
.filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 36px;
}
.filter-bar a {
  padding: 8px 20px;
  font-size: .9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  transition: all var(--duration-fast);
}
.filter-bar a.active, .filter-bar a:hover {
  background: var(--c-blue);
  color: #fff;
  border-color: var(--c-blue);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .header__nav, .header__actions { display: none; }
  .hamburger { display: flex; }
  .features, .list-grid, .solutions, .dev-highlights { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .brand-wall { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .product-detail { grid-template-columns: 1fr; gap: 32px; }
  .sidebar-layout { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .news-item { flex-direction: column; }
  .news-item__image { width: 100%; height: 200px; }
  :root { --section-py: 64px; }
  .inner-banner { height: 240px; }
}

@media (max-width: 768px) {
  .features, .list-grid, .solutions, .dev-highlights { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .brand-wall { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .hero__title { font-size: 1.8rem; }
  .hero__subtitle { font-size: .95rem; }
  .section__title { font-size: 1.8rem; }
  .inquiry-form .form-row { grid-template-columns: 1fr; }
  .footer__bottom-inner { flex-direction: column; text-align: center; }
  .product-detail__specs { grid-template-columns: 1fr; }
  :root { --section-py: 48px; }
  .inner-banner { height: 200px; }
  .inner-banner__title { font-size: 1.6rem; }
}
/* Mobile layout refinement: desktop declarations remain untouched. */
@media (max-width: 1024px) {
 .hamburger{margin-left:auto;flex-shrink:0}
 .mobile-nav{visibility:hidden;max-width:calc(100vw - 28px);height:100dvh}
 .mobile-nav.open{visibility:visible}
 .inner-banner__content{padding:20px 18px}
 .inner-banner__title{overflow-wrap:anywhere;line-height:1.35}
 .container>*{min-width:0}
 .news-item{flex-direction:row;align-items:center;gap:16px}
 .news-item__image{width:30%;height:auto;aspect-ratio:4/3}
 .news-item__body,.detail,.product-detail__info,.contact-info__text{min-width:0}
 .detail__body{overflow-wrap:anywhere}
 .detail__body img{max-width:100%!important;height:auto!important}
 .detail__body table{display:block;max-width:100%;overflow:auto}
 .detail__body pre{max-width:100%;overflow:auto}
 .detail__meta,.detail__prev-next,.card__meta{flex-wrap:wrap}
 .product-detail__info>div[style*="display:flex"]{flex-wrap:wrap}
 .search-form input{min-width:0;width:0}
 .search-form button{padding:12px 18px}
 .sidebar-layout{gap:24px}
 .sidebar__nav{display:flex;flex-wrap:wrap}
 .sidebar__nav a{flex:1 1 auto}
 .sidebar__nav:empty{display:none}
 .footer__grid>*{min-width:0;overflow-wrap:anywhere}
 .contact-form input,.inquiry-form input,.inquiry-form select,.inquiry-form textarea{min-width:0;max-width:100%}
 .contact-form .form-group[style*="display:flex"],.inquiry-form .form-group[style*="display:flex"]{flex-wrap:wrap}
 .dev-card{min-width:0}
 .dev-card code{overflow-wrap:anywhere;white-space:normal}
 .stat-item__number{font-size:clamp(1.5rem,5vw,2.8rem)}
}
@media (max-width: 768px) {
 :root{--header-h:60px;--section-py:30px}
 .container,.header__inner{padding-left:16px;padding-right:16px}
 .header__logo{margin-right:12px;gap:8px;min-width:0}
 .header__logo-text{font-size:1rem}
 .header__logo-icon{width:34px;height:34px;flex-shrink:0}
 .hero{height:430px;min-height:430px;max-height:none;padding-top:var(--header-h)}
 .hero__content{padding:30px 18px 42px;gap:14px}
 .hero__title{font-size:1.7rem;line-height:1.35}
 .hero__subtitle{line-height:1.65}
 .hero__actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
 .hero__actions .btn{padding:10px 16px;font-size:.88rem}
 .hero__scroll-indicator{display:none}
 .section--tight{padding:30px 0}
 .section__header{margin-bottom:22px}
 .section__tag{margin-bottom:9px;padding:4px 10px;font-size:.7rem}
 .section__title{font-size:1.42rem;line-height:1.35}
 .section__subtitle{font-size:.9rem;line-height:1.6}
 .features,.solutions,.dev-highlights{grid-template-columns:minmax(0,1fr);gap:12px}
 .feature-card,.solution-card,.dev-card{padding:18px;text-align:left;display:grid;grid-template-columns:38px minmax(0,1fr);column-gap:12px;align-content:start}
 .feature-card__icon,.solution-card__icon,.dev-card__icon{width:38px;height:38px;margin:0;grid-column:1;grid-row:1/4;font-size:1rem}
 .feature-card> :not([class$="__icon"]),.solution-card> :not([class$="__icon"]),.dev-card> :not([class$="__icon"]){grid-column:2}
 .feature-card__title,.solution-card__title,.dev-card__title{font-size:1rem;margin-bottom:5px}
 .feature-card__desc,.solution-card__desc,.dev-card__desc{font-size:.84rem;line-height:1.65}
 .dev-card code{grid-column:1/-1!important;font-size:.75rem;padding:10px;margin-top:12px}
 .stats{gap:12px;grid-template-columns:repeat(2,minmax(0,1fr))}
 .stat-item{padding:14px 2px}
 .stat-item__number{font-size:clamp(1.35rem,5.6vw,2.2rem)}
 .stat-item__label{font-size:.8rem}
 .list-grid,.list-grid--4,.list-grid--2{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
 .card__image{aspect-ratio:4/3}
 .card__body{padding:12px 10px}
 .card__tag{font-size:.65rem;padding:3px 7px;margin-bottom:7px;max-width:100%;overflow-wrap:anywhere}
 .card__title{font-size:.9rem;line-height:1.5}
 .card__desc{font-size:.78rem;-webkit-line-clamp:2}
 .card__meta{gap:6px;font-size:.7rem;padding-top:9px;margin-top:9px;overflow-wrap:anywhere}
 .news-list{gap:12px}
 .news-item{padding:12px;gap:12px;align-items:flex-start}
 .news-item__image{width:28%;aspect-ratio:1;min-width:70px}
 .news-item__title{font-size:.94rem;line-height:1.5;margin-bottom:6px}
 .news-item__desc{font-size:.8rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:8px}
 .news-item__info{font-size:.7rem;display:flex;flex-wrap:wrap;gap:4px 10px}
 .news-item__info span[style]{margin-left:0!important}
 .section>.container>div[style*="margin-top:40px"]{margin-top:22px!important}
 .cta-card{padding:26px 16px;border-radius:16px}
 .cta-card__title{font-size:1.4rem}
 .cta-card__desc{font-size:.9rem;margin-bottom:18px}
 .btn--lg{padding:12px 22px;font-size:.92rem}
 .inner-banner,.inner-banner[style]{height:164px!important;margin-top:var(--header-h)}
 .inner-banner__title{font-size:1.42rem}
 .inner-banner__subtitle{font-size:.85rem}
 .breadcrumb-bar{padding:10px 0}
 .breadcrumb{font-size:.76rem;overflow-wrap:anywhere}
 .filter-bar{gap:8px;margin-bottom:20px;justify-content:flex-start}
 .filter-bar a{padding:7px 12px;font-size:.8rem}
 .detail__title,.product-detail__title{font-size:1.4rem;line-height:1.45}
 .detail__body{font-size:.94rem;line-height:1.8}
 .detail__body h2,.detail__body h3{margin:22px 0 12px}
 .detail__meta{gap:8px 14px;margin-bottom:20px;padding-bottom:16px;font-size:.78rem}
 .detail__prev-next{gap:12px;margin-top:28px;font-size:.84rem}
 .detail__prev-next a{overflow-wrap:anywhere;max-width:100%}
 .product-detail{gap:22px}
 .product-detail__image{max-height:280px}
 .product-detail__desc{font-size:.9rem;margin-bottom:18px}
 .product-detail__specs{gap:8px}
 .product-detail__spec{font-size:.82rem;padding:9px 12px}
 .section>.container>div[style*="margin-top:60px"]{margin-top:30px!important}
 .tabs{gap:0;overflow:auto}
 .tab-btn{white-space:nowrap;padding:12px 14px;font-size:.85rem}
 .contact-layout{gap:26px}
 .contact-info__item{margin-bottom:14px}
 .contact-info__text{overflow-wrap:anywhere}
 .contact-form input,.contact-form textarea,.inquiry-form input,.inquiry-form textarea,.inquiry-form select{font-size:16px;padding:11px 12px}
 .search-form{margin-bottom:26px}
 .search-form input{padding:12px}
 .footer{padding-top:30px}
 .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 18px;padding:0 16px}
 .footer__grid>div:first-child{grid-column:1/-1}
 .footer__brand-desc{margin-bottom:12px;font-size:.82rem}
 .footer__col-title{margin-bottom:10px;font-size:.92rem}
 .footer__links{gap:7px}
 .footer__links a,.footer__contact-item{font-size:.78rem}
 .footer__bottom{margin-top:26px;padding:16px}
 .footer__bottom-inner{font-size:.72rem;gap:8px}
 .friend-links{padding:16px 0;gap:10px}
 .online-service{width:44px;height:44px;right:12px;bottom:16px;font-size:1.1rem}
 .back-top{right:15px;bottom:70px;width:38px;height:38px}
}