/* ==========================================================================
   精微智建 AI 标书云平台 - 官方宣传门户网站样式库 (style.css)
   设计风格：现代高端科技商务风 (Modern Premium Enterprise Business)
   设计规范：去卡通化、严肃商业、纯净线条、沉稳科技深蓝
   ========================================================================== */

/* -------------------- 1. 全局设计令牌 (Design Tokens) -------------------- */
:root {
  /* 核心企业级色彩体系 */
  --primary-deep: #07152b;        /* 底层沉稳深蓝 */
  --primary-navy: #0b2246;        /* 商务主背景深蓝 */
  --primary-blue: #1459a6;        /* 品牌核心蓝 */
  --primary-light: #1e70c9;       /* 交互明亮蓝 */
  --primary-cyan: #00b4d8;        /* 科技青蓝 (高亮强调) */
  --accent-gold: #d97706;         /* 商务金 (高优标牌) */
  --accent-emerald: #059669;      /* 合规绿 (核验通过) */
  --accent-slate: #475569;        /* 严谨铅灰 */

  /* 背景与表面色彩 */
  --bg-dark: #071326;             /* 暗色板块主背景 */
  --bg-card-dark: rgba(11, 34, 70, 0.78); /* 暗色毛玻璃卡片 */
  --bg-light: #f8fafc;            /* 浅色板块背景 */
  --bg-white: #ffffff;            /* 纯白 */
  --bg-surface: #f1f5f9;          /* 辅助表面浅灰 */

  /* 文字色彩 */
  --text-white: #ffffff;
  --text-light-sub: #cbd5e1;
  --text-light-muted: #94a3b8;
  --text-dark-main: #0f172a;
  --text-dark-sub: #334155;
  --text-dark-muted: #64748b;

  /* 边框与阴影 */
  --border-glass: rgba(255, 255, 255, 0.14);
  --border-glass-hover: rgba(0, 180, 216, 0.45);
  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 18px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 14px 36px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 20px rgba(18, 84, 161, 0.35);

  /* 间距与圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  --nav-height: 70px;
  --container-max: 1220px;

  /* 动画 */
  --transition-fast: all 0.2s ease-out;
  --transition-normal: all 0.3s ease-out;
}

/* -------------------- 2. 重置与基础设置 -------------------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  color: var(--text-dark-main);
  background-color: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  background-color: #fff;
}

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

ul, ol {
  list-style: none;
}

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* -------------------- 2.5 全局固定悬浮印章水印 (Fixed Top-Right Demo Seal) -------------------- */
.demo-watermark-seal {
  position: fixed;
  top: 78px;
  right: 22px;
  z-index: 995;
  width: 116px;
  height: 116px;
  border-radius: 50%;
  border: 2.5px solid rgba(220, 38, 38, 0.85);
  box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.2), 0 8px 24px rgba(0, 0, 0, 0.35), inset 0 0 14px rgba(220, 38, 38, 0.16);
  background: rgba(7, 21, 43, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #ef4444;
  transform: rotate(-12deg);
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
  user-select: none;
  cursor: pointer;
  pointer-events: auto;
}

.demo-watermark-seal:hover {
  transform: rotate(0deg) scale(1.06);
  border-color: rgba(239, 68, 68, 0.98);
  background: rgba(7, 21, 43, 0.92);
  box-shadow: 0 10px 28px rgba(220, 38, 38, 0.45);
}

.seal-inner-border {
  position: absolute;
  inset: 3px;
  border: 1px dashed rgba(239, 68, 68, 0.65);
  border-radius: 50%;
  pointer-events: none;
}

.seal-tag-top {
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.8px;
  color: #f87171;
  line-height: 1.1;
  margin-bottom: 2px;
}

.seal-star-row {
  font-size: 10px;
  color: #f87171;
  line-height: 1;
  margin-bottom: 1px;
  letter-spacing: 2px;
}

.seal-brand-name {
  font-size: 13.5px;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: 1px;
  line-height: 1.15;
  text-shadow: 0 0 6px rgba(239, 68, 68, 0.6);
  text-transform: uppercase;
}

.seal-text-desc {
  font-size: 8.5px;
  font-weight: 700;
  color: #fca5a5;
  letter-spacing: 0.4px;
  line-height: 1.25;
  margin-top: 1px;
}

.seal-tag-bottom {
  font-size: 7.5px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.6px;
  margin-top: 2px;
}

@media (max-width: 1100px) {
  .demo-watermark-seal {
    top: 72px;
    right: 12px;
    width: 102px;
    height: 102px;
  }
  .seal-brand-name { font-size: 12px; }
  .seal-tag-top { font-size: 8px; }
  .seal-text-desc { font-size: 7.5px; }
  .seal-tag-bottom { font-size: 6.5px; }
}

@media (max-width: 768px) {
  .demo-watermark-seal {
    top: 68px;
    right: 8px;
    width: 88px;
    height: 88px;
    transform: rotate(-10deg) scale(0.95);
  }
  .seal-brand-name { font-size: 11px; }
  .seal-tag-top { font-size: 7.5px; }
  .seal-star-row { font-size: 8px; margin-bottom: 0; }
  .seal-text-desc { font-size: 7px; }
  .seal-tag-bottom { display: none; }
}

/* -------------------- 3. 沉浸式吸顶导航栏 (Navbar) -------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: var(--transition-normal);
  background: rgba(7, 21, 43, 0.45);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.navbar.scrolled {
  background: rgba(7, 21, 43, 0.96);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  border-bottom-color: rgba(255, 255, 255, 0.12);
  height: 62px;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* 品牌 Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.logo-symbol {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, #1459a6, #00b4d8);
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 2px 10px rgba(0, 180, 216, 0.3);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
  white-space: nowrap;
}

.logo-title {
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.5px;
  line-height: 1.2;
}

.logo-subtitle {
  font-size: 9px;
  color: var(--primary-cyan);
  letter-spacing: 1px;
  font-weight: 600;
  text-transform: uppercase;
}

/* 导航链接 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 26px;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-item {
  position: relative;
  white-space: nowrap;
}

.nav-link {
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 0;
  position: relative;
  display: inline-block;
  white-space: nowrap;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-cyan);
  transition: var(--transition-fast);
  transform: translateX(-50%);
  border-radius: 2px;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

/* 导航右侧操作区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-search {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-search-input {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-full);
  padding: 5px 30px 5px 12px;
  color: #fff;
  font-size: 12px;
  width: 130px;
  transition: var(--transition-normal);
}

.nav-search-input::placeholder {
  color: rgba(255, 255, 255, 0.55);
}

.nav-search-input:focus {
  width: 170px;
  background: rgba(255, 255, 255, 0.18);
  border-color: var(--primary-cyan);
}

.nav-search-btn {
  position: absolute;
  right: 9px;
  background: transparent;
  color: rgba(255, 255, 255, 0.7);
  cursor: pointer;
  font-size: 13px;
  display: grid;
  place-items: center;
}

.lang-switch {
  color: rgba(255, 255, 255, 0.75);
  font-size: 12px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.lang-switch:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.btn-nav-primary {
  background: linear-gradient(135deg, #1459a6, #1e70c9);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 7px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 10px rgba(20, 89, 166, 0.3);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-fast);
  border: 1px solid rgba(255, 255, 255, 0.15);
  white-space: nowrap;
}

.btn-nav-primary:hover {
  background: linear-gradient(135deg, #1e70c9, #00b4d8);
  transform: translateY(-1px);
}

.mobile-toggle {
  display: none;
  background: transparent;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
}

/* -------------------- 4. 首屏大视界与轮播 (Hero Section & Carousel) -------------------- */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 110px 0 50px;
  overflow: hidden;
  background-color: var(--primary-deep);
}

.hero-slider {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  opacity: 0;
  transform: scale(1.04);
  transition: opacity 1.2s ease-in-out, transform 8s ease-out;
}

.hero-slide.active {
  opacity: 1;
  transform: scale(1);
  z-index: 2;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  background: linear-gradient(
    180deg,
    rgba(7, 21, 43, 0.82) 0%,
    rgba(11, 34, 70, 0.74) 45%,
    rgba(6, 17, 34, 0.94) 100%
  );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
}

/* 顶标微光标签 */
.hero-badge-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(0, 180, 216, 0.3);
  backdrop-filter: blur(8px);
  padding: 5px 16px;
  border-radius: var(--radius-full);
  color: var(--primary-cyan);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--accent-emerald);
}

/* 震撼主标题 (参考新点大字冲击力) */
.hero-title {
  font-size: 50px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #ffffff 40%, #70c4ff 80%, #00b4d8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 副标题描述 */
.hero-subtitle {
  font-size: 17px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.7;
  max-width: 820px;
  margin: 0 auto 30px;
  letter-spacing: 0.2px;
}

/* 了解更多链接 */
.hero-learn-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-cyan);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 34px;
  padding-bottom: 3px;
  border-bottom: 2px solid rgba(0, 180, 216, 0.4);
  transition: var(--transition-fast);
}

.hero-learn-more:hover {
  color: #ffffff;
  border-bottom-color: #ffffff;
}

/* 核心毛玻璃快速咨询输入框 (新点风格转化组件) */
.hero-cta-box {
  background: rgba(11, 34, 70, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 6px 6px 6px 18px;
  max-width: 520px;
  margin: 0 auto 38px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  transition: var(--transition-normal);
}

.hero-cta-box:focus-within {
  border-color: var(--primary-cyan);
  box-shadow: 0 10px 30px rgba(0, 180, 216, 0.2);
  background: rgba(11, 34, 70, 0.9);
}

.cta-input {
  flex: 1;
  background: transparent;
  color: #ffffff;
  font-size: 14px;
  letter-spacing: 0.5px;
}

.cta-input::placeholder {
  color: rgba(255, 255, 255, 0.55);
}

.cta-btn {
  background: linear-gradient(135deg, #1459a6, #1e70c9);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  padding: 12px 26px;
  border-radius: var(--radius-md);
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 3px 12px rgba(20, 89, 166, 0.4);
  transition: var(--transition-fast);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.cta-btn:hover {
  background: linear-gradient(135deg, #1e70c9, #00b4d8);
  transform: translateY(-1px);
}

/* 轮播控制器与分页指示条 (对标参考图) */
.hero-carousel-nav {
  position: relative;
  z-index: 15;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 28px;
}

.hero-carousel-dots {
  display: flex;
  align-items: center;
  gap: 10px;
}

.carousel-dot {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.65);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  cursor: pointer;
  transition: var(--transition-normal);
}

.carousel-dot:hover {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}

.carousel-dot.active {
  background: rgba(0, 180, 216, 0.25);
  border-color: var(--primary-cyan);
  color: #ffffff;
  box-shadow: 0 0 12px rgba(0, 180, 216, 0.3);
}

.hero-carousel-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #ffffff;
  display: grid;
  place-items: center;
  cursor: pointer;
  font-size: 13px;
  transition: var(--transition-fast);
}

.hero-carousel-btn:hover {
  background: var(--primary-cyan);
  color: #07152b;
}

/* 底部滚动提示 */
.hero-scroll-indicator {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.hero-scroll-indicator:hover {
  color: var(--primary-cyan);
}

.scroll-mouse {
  width: 20px;
  height: 32px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 10px;
  position: relative;
}

.scroll-wheel {
  width: 3px;
  height: 6px;
  background: var(--primary-cyan);
  border-radius: 2px;
  position: absolute;
  top: 5px;
  left: 50%;
  transform: translateX(-50%);
  animation: mouse-scroll 1.6s infinite;
}

@keyframes mouse-scroll {
  0% { transform: translate(-50%, 0); opacity: 1; }
  100% { transform: translate(-50%, 12px); opacity: 0; }
}

/* -------------------- 5. 核心指标数据带 (Metrics Strip) -------------------- */
.metrics-strip {
  position: relative;
  z-index: 20;
  margin-top: -44px;
  margin-bottom: 50px;
}

.metrics-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  padding: 28px 36px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  overflow: hidden;
}

.metrics-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #1459a6, #00b4d8, #059669);
}

.metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.metric-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -10px;
  top: 15%;
  height: 70%;
  width: 1px;
  background-color: var(--border-light);
}

.metric-value-wrap {
  display: flex;
  align-items: baseline;
  gap: 3px;
  margin-bottom: 4px;
}

.metric-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary-blue);
  line-height: 1;
  font-feature-settings: "tnum";
}

.metric-unit {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary-light);
}

.metric-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark-main);
  margin-bottom: 2px;
}

.metric-desc {
  font-size: 12px;
  color: var(--text-dark-muted);
}

/* -------------------- 6. 通用板块标题 (Section Headers) -------------------- */
.section-wrapper {
  padding: 84px 0;
  position: relative;
}

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

.section-wrapper.bg-dark {
  background-color: var(--bg-dark);
  color: #fff;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--primary-blue);
  background: rgba(20, 89, 166, 0.08);
  padding: 3px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 10px;
}

.section-wrapper.bg-dark .section-tag {
  color: var(--primary-cyan);
  background: rgba(0, 180, 216, 0.12);
  border: 1px solid rgba(0, 180, 216, 0.25);
}

.section-title {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
  color: var(--text-dark-main);
}

.section-wrapper.bg-dark .section-title {
  color: #ffffff;
}

.section-desc {
  font-size: 15px;
  color: var(--text-dark-muted);
  line-height: 1.65;
}

.section-wrapper.bg-dark .section-desc {
  color: var(--text-light-sub);
}

/* -------------------- 7. 板块一：行业痛点 vs 精微突破 (Pain vs Solution) -------------------- */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.pain-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.pain-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.pain-header-box {
  margin-bottom: 14px;
}

.pain-index-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  color: #dc2626;
  background: #fef2f2;
  border: 1px solid #fecaca;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.pain-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark-main);
  line-height: 1.4;
}

.pain-divider {
  height: 1px;
  background-color: var(--border-light);
  margin: 12px 0;
  position: relative;
}

.pain-divider::after {
  content: 'VS';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--bg-white);
  padding: 0 6px;
  font-size: 10px;
  font-weight: 800;
  color: var(--text-dark-muted);
}

.solution-box {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 14px;
  border-left: 3px solid var(--primary-blue);
  flex: 1;
}

.solution-tag {
  font-size: 11px;
  font-weight: 700;
  color: var(--primary-blue);
  text-transform: uppercase;
  margin-bottom: 4px;
  display: block;
}

.solution-desc {
  font-size: 13px;
  color: var(--text-dark-sub);
  line-height: 1.6;
}

/* -------------------- 8. 板块二：核心功能四大矩阵 (Core Capabilities) -------------------- */
.caps-container {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.cap-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.cap-row:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(20, 89, 166, 0.2);
}

.cap-row.reverse .cap-content-col {
  order: 2;
}
.cap-row.reverse .cap-visual-col {
  order: 1;
}

.cap-num {
  font-size: 12px;
  font-weight: 700;
  color: var(--primary-blue);
  background: rgba(20, 89, 166, 0.08);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 10px;
}

.cap-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-dark-main);
  line-height: 1.35;
  margin-bottom: 12px;
}

.cap-lead {
  font-size: 14px;
  color: var(--text-dark-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.cap-features {
  display: grid;
  gap: 10px;
}

.cap-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--text-dark-sub);
}

.cap-check-badge {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(5, 150, 105, 0.12);
  color: var(--accent-emerald);
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

/* 功能落地效果示意窗 (商业严肃风) */
.cap-ui-mockup {
  background: #0b1e3b;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  color: #fff;
  font-size: 13px;
}

.mockup-header {
  height: 34px;
  background: #0f274c;
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.mockup-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
}

.mockup-dot.red {
  background: #ef4444;
  box-shadow: 0 0 4px rgba(239, 68, 68, 0.4);
}

.mockup-dot.yellow {
  background: #f59e0b;
  box-shadow: 0 0 4px rgba(245, 158, 11, 0.4);
}

.mockup-dot.green {
  background: #10b981;
  box-shadow: 0 0 4px rgba(16, 185, 129, 0.4);
}

.mockup-title {
  margin-left: 8px;
  font-size: 11px;
  color: var(--text-light-muted);
  font-weight: 500;
}

.mockup-body {
  padding: 18px;
}

.status-pill {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
}
.status-pill.blue { background: rgba(30, 112, 201, 0.25); color: #70c4ff; }
.status-pill.green { background: rgba(5, 150, 105, 0.25); color: #6ee7b7; }
.status-pill.amber { background: rgba(217, 119, 6, 0.25); color: #fcd34d; }

/* -------------------- 9. 板块三：企业级安全与可靠性保障 (Security & Enterprise Reliability) -------------------- */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 36px;
}

.arch-card {
  background: var(--bg-card-dark);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  backdrop-filter: blur(12px);
  transition: var(--transition-normal);
}

.arch-card:hover {
  border-color: var(--primary-cyan);
  transform: translateY(-3px);
}

.arch-card-badge {
  font-size: 11px;
  font-weight: 700;
  color: var(--primary-cyan);
  background: rgba(0, 180, 216, 0.12);
  border: 1px solid rgba(0, 180, 216, 0.25);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 14px;
}

.arch-card-title {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.arch-card-desc {
  font-size: 13px;
  color: var(--text-light-sub);
  line-height: 1.7;
}

.arch-pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}

.arch-pill {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-light-sub);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.arch-banner {
  background: rgba(11, 34, 70, 0.6);
  border: 1px solid rgba(0, 180, 216, 0.25);
  border-radius: var(--radius-lg);
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.arch-banner-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
}

.arch-banner-desc {
  font-weight: 400;
  font-size: 13px;
  color: #94a3b8;
  margin-top: 4px;
  line-height: 1.6;
}

/* -------------------- 10. 板块四：三档阶梯部署方案 (Deployment Matrix) -------------------- */
.deploy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.deploy-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
  position: relative;
}

.deploy-card.popular {
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-lg);
  transform: scale(1.02);
  z-index: 2;
}

.deploy-badge-popular {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #1459a6, #1e70c9);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
}

.deploy-header {
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
}

.deploy-tier-tag {
  font-size: 12px;
  font-weight: 700;
  color: var(--primary-blue);
  margin-bottom: 4px;
  display: block;
}

.deploy-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-dark-main);
  margin-bottom: 6px;
}

.deploy-spec-lead {
  font-size: 13px;
  color: var(--text-dark-muted);
}

.deploy-features-list {
  display: grid;
  gap: 12px;
  margin-bottom: 28px;
  flex: 1;
}

.deploy-feature-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--text-dark-sub);
}

.deploy-feature-item strong {
  color: var(--text-dark-main);
}

.btn-deploy {
  width: 100%;
  padding: 11px 0;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  transition: var(--transition-fast);
}

.btn-deploy.outline {
  background: transparent;
  border: 1px solid var(--primary-blue);
  color: var(--primary-blue);
}

.btn-deploy.outline:hover {
  background: rgba(20, 89, 166, 0.05);
}

.btn-deploy.solid {
  background: linear-gradient(135deg, #1459a6, #1e70c9);
  color: #fff;
  border: none;
  box-shadow: 0 3px 12px rgba(20, 89, 166, 0.3);
}

.btn-deploy.solid:hover {
  background: linear-gradient(135deg, #1e70c9, #00b4d8);
}

/* -------------------- 11. 转化大横幅 (Bottom CTA Section) -------------------- */
.cta-section {
  position: relative;
  background: linear-gradient(135deg, #071326 0%, #0c2b54 50%, #07152b 100%);
  padding: 76px 0;
  color: #fff;
  overflow: hidden;
}

.cta-box-center {
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
  position: relative;
  z-index: 10;
}

.cta-heading {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 14px;
}

.cta-subheading {
  font-size: 15px;
  color: var(--text-light-sub);
  margin-bottom: 32px;
  line-height: 1.7;
}

.cta-form-row {
  display: flex;
  gap: 10px;
  max-width: 480px;
  margin: 0 auto 18px;
}

.cta-input-lg {
  flex: 1;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: #fff;
  font-size: 14px;
}

.cta-input-lg:focus {
  border-color: var(--primary-cyan);
  background: rgba(255, 255, 255, 0.16);
}

.cta-submit-btn {
  background: linear-gradient(135deg, #1459a6, #00b4d8);
  color: #fff;
  font-weight: 700;
  padding: 12px 26px;
  border-radius: var(--radius-md);
  cursor: pointer;
  white-space: nowrap;
  font-size: 14px;
  transition: var(--transition-fast);
}

.cta-submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 180, 216, 0.35);
}

.cta-promise {
  font-size: 12px;
  color: var(--text-light-muted);
}

/* -------------------- 12. 页脚区域 (Footer) -------------------- */
.footer {
  background: #050d1a;
  color: var(--text-light-muted);
  padding: 56px 0 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

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

.footer-about-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-about-p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-light-sub);
  max-width: 320px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-col ul {
  display: grid;
  gap: 9px;
}

.footer-col li a {
  font-size: 13px;
  color: var(--text-light-muted);
  transition: var(--transition-fast);
}

.footer-col li a:hover {
  color: var(--primary-cyan);
}

.footer-bottom {
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 12px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

/* -------------------- 13. 浮动小工具与弹窗 (Widgets & Modals) -------------------- */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 40px;
  height: 40px;
  background: rgba(7, 21, 43, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  cursor: pointer;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: var(--transition-normal);
  font-size: 14px;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary-light);
}

/* Toast 提示 */
.toast-notice {
  position: fixed;
  top: 84px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: rgba(11, 34, 70, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid var(--primary-cyan);
  color: #fff;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-normal);
}

.toast-notice.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* 模态弹窗 */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(8px);
  display: none;
  place-items: center;
  z-index: 1500;
  padding: 20px;
}

.modal-overlay.active {
  display: grid;
}

.modal-content {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  max-width: 480px;
  width: 100%;
  padding: 30px;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.35);
  position: relative;
  animation: modal-in 0.22s ease-out;
}

@keyframes modal-in {
  from { transform: scale(0.96); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.modal-close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 22px;
  background: transparent;
  color: var(--text-dark-muted);
  cursor: pointer;
  line-height: 1;
}

/* 半透明科技深蓝毛玻璃弹窗 (Glassmorphism Theme) */
.modal-content.glass-theme {
  background: rgba(11, 34, 70, 0.94);
  border: 1px solid rgba(0, 180, 216, 0.4);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: #fff;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6), 0 0 35px rgba(0, 180, 216, 0.25);
  max-width: 520px;
}

.modal-close-btn.light {
  color: rgba(255, 255, 255, 0.7);
}

.modal-close-btn.light:hover {
  color: var(--primary-cyan);
}

.modal-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 180, 216, 0.12);
  border: 1px solid rgba(0, 180, 216, 0.3);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  color: var(--primary-cyan);
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 14px;
}

.modal-badge .badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent-emerald);
  border-radius: 50%;
}

.modal-title-glass {
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
  line-height: 1.35;
}

.modal-desc-glass {
  font-size: 13.5px;
  color: var(--text-light-sub);
  line-height: 1.7;
  margin-bottom: 20px;
}

.modal-support-card {
  background: rgba(7, 21, 43, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  margin-bottom: 24px;
}

.support-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.support-card-tag {
  font-size: 11px;
  color: var(--text-light-muted);
  font-weight: 600;
}

.support-card-brand {
  font-size: 14px;
  font-weight: 900;
  color: var(--primary-cyan);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.support-card-p {
  font-size: 12px;
  color: var(--text-light-sub);
  line-height: 1.5;
  margin-bottom: 10px;
}

.support-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #70c4ff;
  font-size: 13px;
  font-weight: 600;
  text-decoration: underline;
  transition: var(--transition-fast);
}

.support-card-link:hover {
  color: var(--primary-cyan);
}

.modal-actions-row {
  display: flex;
  width: 100%;
}

.btn-modal-primary {
  width: 100%;
  background: linear-gradient(135deg, #1459a6, #00b4d8);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  padding: 13px 20px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 16px rgba(0, 180, 216, 0.35);
  transition: var(--transition-fast);
}

.btn-modal-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(0, 180, 216, 0.5);
  background: linear-gradient(135deg, #1e70c9, #00b4d8);
}

/* -------------------- 14. 响应式布局适配 (Responsive Design) -------------------- */
@media (max-width: 1200px) {
  .nav-menu { gap: 18px; }
  .nav-search-input { width: 110px; }
  .nav-search-input:focus { width: 140px; }
}

@media (max-width: 1024px) {
  .nav-search { display: none; }
  .nav-menu { gap: 16px; }
  .hero-title { font-size: 40px; }
  .metrics-card { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .metric-item:nth-child(2)::after { display: none; }
  .pain-grid { grid-template-columns: repeat(2, 1fr); }
  .cap-row, .cap-row.reverse { grid-template-columns: 1fr; gap: 28px; }
  .cap-row.reverse .cap-content-col { order: 1; }
  .cap-row.reverse .cap-visual-col { order: 2; }
  .arch-grid { grid-template-columns: 1fr; }
  .deploy-grid { grid-template-columns: 1fr; }
  .deploy-card.popular { transform: none; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 920px) {
  .nav-menu, .lang-switch { display: none; }
  .nav-menu.mobile-open {
    display: flex;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(7, 21, 43, 0.98);
    flex-direction: column;
    padding: 24px 32px;
    gap: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 14px 36px rgba(0, 0, 0, 0.6);
    z-index: 999;
  }
  .mobile-toggle { display: block; }
}

@media (max-width: 768px) {
  .hero-title { font-size: 30px; }
  .hero-subtitle { font-size: 14px; }
  .hero-cta-box { flex-direction: column; padding: 10px; }
  .cta-input { width: 100%; text-align: center; }
  .cta-btn { width: 100%; }
  .metrics-card { grid-template-columns: 1fr; }
  .metric-item::after { display: none !important; }
  .pain-grid { grid-template-columns: 1fr; }
  .cta-form-row { flex-direction: column; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
}