/* ============================================
   谦升鼎智库 - 全站样式系统
   设计理念：谦·升·鼎三卦国学 + 现代科技极简
   色彩体系：谦青(谦卦·合规) + 升赭(升卦·增长) + 鼎赤(鼎卦·固本)
   ============================================ */

/* ===== CSS 变量定义 ===== */
:root {
  /* 主色体系 - 三卦专属配色，浅色版，庄重大气不沉闷 */
  --color-qianqing: #2E8B8B;        /* 谦青 - 谦卦，沉稳内敛，合规守正 */
  --color-qianqing-light: #4AAAAA;
  --color-qianqing-lighter: #E8F4F4;
  --color-qianqing-pale: #F0F7F7;
  /* 兼容旧名 */
  --color-xuanqing: #2E8B8B;
  --color-xuanqing-light: #4AAAAA;
  --color-xuanqing-lighter: #E8F4F4;
  --color-xuanqing-pale: #F0F7F7;
  
  --color-shengzhe: #C49A4A;        /* 升赭 - 升卦，温润进阶，顺势增长 */
  --color-shengzhe-light: #D4AC5C;
  --color-shengzhe-lighter: #F5EDE0;
  --color-shengzhe-pale: #FAF5EC;
  /* 兼容旧名 */
  --color-zhehuang: #C49A4A;
  --color-zhehuang-light: #D4AC5C;
  --color-zhehuang-lighter: #F5EDE0;
  --color-zhehuang-pale: #FAF5EC;
  
  --color-dingchi: #C25B4E;          /* 鼎赤 - 鼎卦，厚重大气，基业长青 */
  --color-dingchi-light: #D67468;
  --color-dingchi-lighter: #FAEEEC;
  /* 兼容旧名 */
  --color-yahong: #C25B4E;
  --color-yahong-light: #D67468;
  --color-yahong-lighter: #FAEEEC;
  
  /* 中性色 */
  --color-bg: #FAFAF6;
  --color-bg-warm: #F8F5EF;
  --color-card: #FFFFFF;
  --color-card-alt: #F9F7F2;
  --color-text: #3D4F5C;
  --color-text-light: #6B7C8C;
  --color-text-muted: #9AA8B5;
  --color-border: #E8E3D9;
  --color-border-light: #F0EDE6;
  
  /* 渐变 */
  --gradient-qianqing: linear-gradient(135deg, #2E8B8B 0%, #4AAAAA 100%);
  --gradient-shengzhe: linear-gradient(135deg, #C49A4A 0%, #D4AC5C 100%);
  --gradient-dingchi: linear-gradient(135deg, #C25B4E 0%, #D67468 100%);
  --gradient-hero: linear-gradient(135deg, #E8F4F4 0%, #FAF5EC 50%, #FAEEEC 100%);
  --gradient-card: linear-gradient(180deg, #FFFFFF 0%, #F9F7F2 100%);
  /* 兼容旧名 */
  --gradient-xuanqing: linear-gradient(135deg, #2E8B8B 0%, #4AAAAA 100%);
  --gradient-zhehuang: linear-gradient(135deg, #C49A4A 0%, #D4AC5C 100%);
  --gradient-yahong: linear-gradient(135deg, #C25B4E 0%, #D67468 100%);
  
  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(46, 139, 139, 0.06);
  --shadow-md: 0 4px 20px rgba(46, 139, 139, 0.08);
  --shadow-lg: 0 8px 40px rgba(46, 139, 139, 0.12);
  --shadow-hover: 0 12px 48px rgba(46, 139, 139, 0.15);
  --shadow-gold: 0 4px 20px rgba(196, 154, 74, 0.12);
  
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  
  /* 过渡 */
  --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: all 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  
  /* 字体 */
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  
  /* 布局 */
  --max-width: 1280px;
  --nav-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

ul, ol {
  list-style: none;
}

/* ===== 通用容器 ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

@media (max-width: 1280px) {
  .container { max-width: 100%; padding: 0 24px; }
  .nav-menu a { padding: 8px 12px; font-size: 0.85rem; }
}

.section {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.section-alt {
  background: var(--color-bg-warm);
}

/* ===== 标题样式 ===== */
.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title .title-main {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 4px;
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
}

.section-title .title-main::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--gradient-xuanqing);
  border-radius: 2px;
}

.section-title .title-sub {
  font-size: 1rem;
  color: var(--color-text-light);
  letter-spacing: 2px;
  margin-top: 24px;
}

.section-title .title-tag {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--color-xuanqing);
  letter-spacing: 3px;
  margin-bottom: 12px;
  padding: 4px 16px;
  background: var(--color-xuanqing-lighter);
  border-radius: 20px;
  font-weight: 500;
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(250, 250, 246, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-light);
  z-index: 1000;
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: 100%;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.nav-logo .logo-icon {
  width: 42px;
  height: 42px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.nav-logo .logo-text {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-qianqing);
  letter-spacing: 2px;
  white-space: nowrap;
}

.nav-logo .logo-sub {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 1px;
  margin-top: 2px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2px;
  white-space: nowrap;
}

.nav-menu a {
  padding: 8px 14px;
  font-size: 0.88rem;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  position: relative;
  font-weight: 500;
  white-space: nowrap;
}

.nav-menu a:hover {
  color: var(--color-xuanqing);
  background: var(--color-xuanqing-pale);
}

.nav-menu a.active {
  color: var(--color-xuanqing);
  background: var(--color-xuanqing-lighter);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: none;
  transition: var(--transition);
  letter-spacing: 1px;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-xuanqing);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(196, 154, 74, 0.2);
}

.btn-outline {
  background: transparent;
  color: var(--color-xuanqing);
  border: 1.5px solid var(--color-xuanqing);
}

.btn-outline:hover {
  background: var(--color-xuanqing);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  padding: 8px 16px;
}

.btn-ghost:hover {
  color: var(--color-xuanqing);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero 首屏 ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: var(--gradient-hero);
  overflow: hidden;
  padding-top: var(--nav-height);
}

/* 三卦抽象光影装饰 */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 15% 25%, rgba(46, 139, 139, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 60% 85%, rgba(196, 154, 74, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 85% 30%, rgba(194, 91, 78, 0.04) 0%, transparent 50%);
  pointer-events: none;
}

/* 极简三卦线条装饰 */
.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(0deg, transparent 49%, rgba(46, 139, 139, 0.04) 49%, rgba(46, 139, 139, 0.04) 51%, transparent 51%);
  background-size: 80px 80px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  width: 100%;
}

.hero-text {
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(46, 139, 139, 0.08);
  border: 1px solid rgba(46, 139, 139, 0.15);
  border-radius: 30px;
  font-size: 0.85rem;
  color: var(--color-xuanqing);
  margin-bottom: 28px;
  letter-spacing: 1px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--color-xuanqing);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 2.88rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 24px;
  letter-spacing: 3px;
}

.hero-title .accent {
  color: var(--color-xuanqing);
}

.hero-title .accent-gold {
  color: var(--color-shengzhe);
}

.hero-title .accent-red {
  color: var(--color-dingchi);
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 40px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 48px;
}

.hero-stat .stat-num {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-xuanqing);
  line-height: 1;
}

.hero-stat .stat-label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-top: 8px;
  letter-spacing: 1px;
}

/* Hero 右侧视觉 - 乾坤双轮 */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 480px;
}

.dual-wheel {
  position: relative;
  width: 420px;
  height: 420px;
}

.wheel-ring {
  position: absolute;
  border-radius: 50%;
  border: 2px solid;
}

.wheel-ring-outer {
  width: 100%;
  height: 100%;
  border-color: rgba(46, 139, 139, 0.15);
  top: 0;
  left: 0;
}

.wheel-ring-mid {
  width: 80%;
  height: 80%;
  border-color: rgba(196, 154, 74, 0.2);
  top: 10%;
  left: 10%;
  border-style: dashed;
  animation: rotate 40s linear infinite;
}

.wheel-ring-inner {
  width: 55%;
  height: 55%;
  border-color: rgba(194, 91, 78, 0.15);
  top: 22.5%;
  left: 22.5%;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.wheel-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 200px;
  height: 200px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
  overflow: visible;
}

.taiji-rotate,
.taiji-rotate-svg {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  transform-origin: 50% 50%;
  animation: taiji-spin 60s linear infinite;
  -webkit-animation: taiji-spin 60s linear infinite;
}

@keyframes taiji-spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
@-webkit-keyframes taiji-spin {
  0% { -webkit-transform: rotate(0deg); }
  100% { -webkit-transform: rotate(360deg); }
}

/* 卦爻节点 - 三卦均分120° */
.hexagram-node {
  position: absolute;
  width: 60px;
  height: 60px;
  margin: -30px 0 0 -30px;  /* 把元素中心拉到 (left, top) 位置 */
  border-radius: 50%;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  box-shadow: var(--shadow-md);
  z-index: 4;
  cursor: pointer;
  border: 2px solid currentColor;
}

.hexagram-node:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,.15);
}

/* 谦 - 12点 (0°)：移到外圈线外面 */
.hex-top {
  color: var(--color-qianqing);
  top: 0;
  left: 50%;
  margin-top: -60px;
}

/* 鼎 - 8点 (240°)：center at (25%, 93.3%) */
.hex-left {
  color: var(--color-dingchi);
  top: 93.3%;
  left: 25%;
}

/* 升 - 4点 (120°)：center at (75%, 93.3%) */
.hex-bottom {
  color: var(--color-shengzhe);
  top: 93.3%;
  left: 75%;
}

/* 浮动标签 */
.wheel-label {
  position: absolute;
  font-size: 0.8rem;
  color: var(--color-text-light);
  letter-spacing: 1px;
  white-space: nowrap;
  z-index: 4;
}

.wheel-label-top {
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
}

.wheel-label-bottom {
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
}

/* ===== 核心定位区 ===== */
.core-position {
  padding: 100px 0;
  background: var(--color-card);
}

.core-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.core-card {
  padding: 40px 32px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.core-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-xuanqing);
  transform: scaleX(0);
  transition: var(--transition);
}

.core-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-xuanqing-light);
}

.core-card:hover::before {
  transform: scaleX(1);
}

.core-card .card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
}

.core-card .card-icon.teal {
  background: var(--color-xuanqing-lighter);
  color: var(--color-xuanqing);
}

.core-card .card-icon.gold {
  background: var(--color-zhehuang-lighter);
  color: var(--color-zhehuang);
}

.core-card .card-icon.red {
  background: var(--color-yahong-lighter);
  color: var(--color-yahong);
}

.core-card .card-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.core-card .card-desc {
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ===== 鼎鉴智策板块 ===== */
.dingjian-section {
  background: var(--color-bg);
  position: relative;
}

/* GRCIQA 双轮模型展示 */
.model-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
  padding: 48px;
  background: var(--gradient-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

.model-visual {
  position: relative;
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.model-diagram {
  width: 100%;
  max-width: 400px;
}

.model-info .model-tag {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--color-zhehuang);
  background: var(--color-zhehuang-lighter);
  padding: 4px 16px;
  border-radius: 20px;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.model-info .model-title {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 20px;
  letter-spacing: 2px;
}

.model-info .model-desc {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 24px;
}

.model-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.model-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--color-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-light);
}

.model-feature .feat-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.model-feature .feat-icon.teal {
  background: var(--color-xuanqing-lighter);
  color: var(--color-xuanqing);
}

.model-feature .feat-icon.gold {
  background: var(--color-zhehuang-lighter);
  color: var(--color-zhehuang);
}

.model-feature .feat-text {
  font-size: 0.85rem;
  color: var(--color-text);
  font-weight: 500;
}

/* 四大鼎系列产品九宫格 */
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.product-card {
  padding: 36px 32px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.product-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  opacity: 0.05;
  transition: var(--transition-slow);
}

.product-card.p1::after { background: var(--color-xuanqing); }
.product-card.p2::after { background: var(--color-zhehuang); }
.product-card.p3::after { background: var(--color-yahong); }
.product-card.p4::after { background: var(--color-xuanqing); }

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.product-card:hover::after {
  top: -30%;
  right: -30%;
  opacity: 0.08;
}

.product-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.product-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  flex-shrink: 0;
}

.p1 .product-icon { background: var(--color-xuanqing-lighter); color: var(--color-xuanqing); }
.p2 .product-icon { background: var(--color-zhehuang-lighter); color: var(--color-zhehuang); }
.p3 .product-icon { background: var(--color-yahong-lighter); color: var(--color-yahong); }
.p4 .product-icon { background: var(--color-xuanqing-lighter); color: var(--color-xuanqing); }

.product-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 1px;
}

.product-tier {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 4px;
  letter-spacing: 1px;
}

.product-desc {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 20px;
}

.product-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.product-features .pf-tag {
  font-size: 0.78rem;
  padding: 4px 12px;
  border-radius: 6px;
  background: var(--color-card-alt);
  color: var(--color-text-light);
}

.product-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.product-price {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-xuanqing);
}

.product-price .unit {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

/* AI自测区 */
.ai-test-banner {
  margin-top: 60px;
  padding: 48px;
  background: var(--gradient-xuanqing);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  position: relative;
  overflow: hidden;
}

.ai-test-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(255,255,255,0.05) 0%, transparent 50%);
}

.ai-test-content {
  position: relative;
  z-index: 2;
  color: #fff;
}

.ai-test-content h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.ai-test-content p {
  font-size: 0.95rem;
  opacity: 0.9;
  line-height: 1.8;
}

.ai-test-btn {
  position: relative;
  z-index: 2;
  background: #fff;
  color: var(--color-xuanqing);
  padding: 14px 36px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 1px;
  white-space: nowrap;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.ai-test-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

/* ===== 财策商机板块 ===== */
.opportunity-section {
  background: var(--color-bg-warm);
  position: relative;
}

.opp-filters {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
  justify-content: center;
}

.opp-filter {
  padding: 8px 24px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 30px;
  font-size: 0.88rem;
  color: var(--color-text-light);
  cursor: pointer;
  transition: var(--transition);
}

.opp-filter:hover {
  border-color: var(--color-xuanqing-light);
  color: var(--color-xuanqing);
}

.opp-filter.active {
  background: var(--gradient-xuanqing);
  color: #fff;
  border-color: transparent;
}

.opp-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.opp-card {
  padding: 28px;
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  position: relative;
}

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

.opp-card .opp-tag {
  display: inline-block;
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
  font-weight: 500;
}

.opp-tag.hot {
  background: var(--color-yahong-lighter);
  color: var(--color-yahong);
}

.opp-tag.new {
  background: var(--color-xuanqing-lighter);
  color: var(--color-xuanqing);
}

.opp-tag.policy {
  background: var(--color-zhehuang-lighter);
  color: var(--color-zhehuang);
}

.opp-card .opp-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  line-height: 1.5;
}

.opp-card .opp-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.opp-card .opp-meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.opp-card .opp-meta-row .meta-label {
  color: var(--color-text-muted);
  min-width: 64px;
}

.opp-card .opp-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--color-border-light);
}

.opp-card .opp-budget {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-yahong);
}

.opp-card .opp-action {
  font-size: 0.85rem;
  color: var(--color-xuanqing);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

.opp-card .opp-action:hover {
  gap: 8px;
}

/* ===== 智囊团板块 ===== */
.expert-section {
  background: var(--color-bg);
}

.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.expert-card {
  padding: 32px 24px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
}

.expert-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-xuanqing-light);
}

.expert-avatar {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
}

.expert-avatar.teal { background: var(--gradient-xuanqing); }
.expert-avatar.gold { background: var(--gradient-zhehuang); }
.expert-avatar.red { background: var(--gradient-yahong); }

.expert-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}

.expert-title {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.expert-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-bottom: 20px;
}

.expert-tags .et {
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 4px;
  background: var(--color-xuanqing-pale);
  color: var(--color-xuanqing);
}

.expert-action {
  width: 100%;
  padding: 10px;
  background: var(--color-xuanqing-pale);
  color: var(--color-xuanqing);
  border: 1px solid var(--color-xuanqing-light);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.expert-action:hover {
  background: var(--color-xuanqing);
  color: #fff;
}

/* AI 智能分诊 */
.ai-triage {
  padding: 48px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.triage-info h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.triage-info p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 24px;
}

.triage-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.triage-step {
  display: flex;
  align-items: center;
  gap: 16px;
}

.triage-step .step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-xuanqing);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  flex-shrink: 0;
}

.triage-step .step-text {
  font-size: 0.9rem;
  color: var(--color-text);
}

.triage-demo {
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
}

.triage-demo .demo-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border-light);
}

.triage-demo .demo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.triage-demo .demo-dot.red { background: #FF5F57; }
.triage-demo .demo-dot.yellow { background: #FEBC2E; }
.triage-demo .demo-dot.green { background: #28C840; }

.triage-chat {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-msg {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  line-height: 1.6;
}

.chat-msg.ai {
  background: var(--color-xuanqing-pale);
  color: var(--color-text);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.chat-msg.user {
  background: var(--gradient-xuanqing);
  color: #fff;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.chat-input {
  margin-top: 20px;
  display: flex;
  gap: 12px;
}

.chat-input input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  outline: none;
  transition: var(--transition);
}

.chat-input input:focus {
  border-color: var(--color-xuanqing);
}

.chat-input button {
  padding: 12px 24px;
  background: var(--gradient-xuanqing);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.chat-input button:hover {
  opacity: 0.9;
}

/* ===== 谦升商学院板块 ===== */
.school-section {
  background: var(--color-bg-warm);
  position: relative;
  overflow: hidden;
}

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

.school-tab {
  padding: 10px 28px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 30px;
  font-size: 0.9rem;
  color: var(--color-text-light);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
}

.school-tab:hover {
  color: var(--color-zhehuang);
  border-color: var(--color-zhehuang-light);
}

.school-tab.active {
  background: var(--gradient-zhehuang);
  color: #fff;
  border-color: transparent;
}

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

.course-card {
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.course-thumb {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 700;
  color: #fff;
  position: relative;
}

.course-thumb.t1 { background: linear-gradient(135deg, #2E8B8B, #4AAAAA); }
.course-thumb.t2 { background: linear-gradient(135deg, #C49A4A, #D4AC5C); }
.course-thumb.t3 { background: linear-gradient(135deg, #C25B4E, #D67468); }
.course-thumb.t4 { background: linear-gradient(135deg, #4AAAAA, #6BBBBB); }

.course-thumb .course-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 4px;
  background: rgba(255,255,255,0.25);
  backdrop-filter: blur(10px);
  color: #fff;
}

.course-thumb .course-badge.paid {
  background: rgba(194, 91, 78, 0.8);
}

.course-body {
  padding: 24px;
}

.course-cat {
  font-size: 0.75rem;
  color: var(--color-zhehuang);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.course-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  line-height: 1.5;
}

.course-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.course-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--color-border-light);
}

.course-teacher {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.course-teacher .ct-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-xuanqing-lighter);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--color-xuanqing);
  font-weight: 600;
}

.course-price {
  font-family: var(--font-serif);
  font-weight: 700;
}

.course-price.free {
  color: var(--color-xuanqing);
}

.course-price.paid {
  color: var(--color-yahong);
}

/* ===== 政企合作板块 ===== */
.coop-section {
  background: var(--color-bg);
}

.coop-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-bottom: 48px;
}

.coop-card {
  padding: 36px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  display: flex;
  gap: 24px;
  transition: var(--transition);
}

.coop-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.coop-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  flex-shrink: 0;
}

.coop-icon.teal { background: var(--color-xuanqing-lighter); color: var(--color-xuanqing); }
.coop-icon.gold { background: var(--color-zhehuang-lighter); color: var(--color-zhehuang); }
.coop-icon.red { background: var(--color-yahong-lighter); color: var(--color-yahong); }

.coop-content h4 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.coop-content p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 标杆案例 */
.cases-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  padding: 32px;
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.case-card .case-industry {
  font-size: 0.78rem;
  color: var(--color-zhehuang);
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.case-card .case-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  line-height: 1.5;
}

.case-card .case-desc {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.case-card .case-result {
  display: flex;
  gap: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border-light);
}

.case-result .cr-item {
  text-align: center;
}

.case-result .cr-num {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-xuanqing);
}

.case-result .cr-label {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ===== 关于我们 ===== */
.about-section {
  background: var(--color-bg-warm);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text .about-tag {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--color-xuanqing);
  background: var(--color-xuanqing-lighter);
  padding: 4px 16px;
  border-radius: 20px;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.about-text h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 24px;
  letter-spacing: 2px;
}

.about-text p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 2;
  margin-bottom: 20px;
}

.about-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.about-value {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--color-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-light);
}

.about-value .av-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
}

.about-value .av-icon.teal { background: var(--color-xuanqing-lighter); color: var(--color-xuanqing); }
.about-value .av-icon.gold { background: var(--color-zhehuang-lighter); color: var(--color-zhehuang); }

.about-value .av-text {
  font-size: 0.88rem;
  color: var(--color-text);
  font-weight: 500;
}

.about-visual {
  position: relative;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.about-stat-card {
  padding: 32px 24px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
}

.about-stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.about-stat-card .as-num {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.about-stat-card.teal .as-num { color: var(--color-xuanqing); }
.about-stat-card.gold .as-num { color: var(--color-zhehuang); }
.about-stat-card.red .as-num { color: var(--color-yahong); }
.about-stat-card.dark .as-num { color: var(--color-text); }

.about-stat-card .as-label {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* ===== 页脚 ===== */
.footer {
  background: #F5F2EC;
  padding: 64px 0 32px;
  border-top: 1px solid var(--color-border);
}

.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.footer-brand .footer-logo .logo-text {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-xuanqing);
  letter-spacing: 2px;
}

.footer-brand .footer-desc {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 360px;
}

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

.footer-contact .fc-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.footer-col h5 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul a {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.footer-col ul a:hover {
  color: var(--color-xuanqing);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-bottom .fb-left {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.footer-bottom .fb-right {
  display: flex;
  gap: 20px;
}

.footer-bottom .fb-right a {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.footer-bottom .fb-right a:hover {
  color: var(--color-xuanqing);
}

/* ===== 浮动咨询 ===== */
.float-consult {
  position: fixed;
  right: 32px;
  bottom: 32px;
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.float-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border: none;
  font-size: 1.3rem;
}

.float-btn:hover {
  transform: scale(1.08);
}

.float-btn.ai {
  background: var(--gradient-xuanqing);
  color: #fff;
}

.float-btn.top {
  background: var(--color-card);
  color: var(--color-xuanqing);
  border: 1px solid var(--color-border);
}

/* ===== AI对话弹窗 ===== */
.ai-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(61, 79, 92, 0.4);
  backdrop-filter: blur(4px);
  z-index: 1100;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.ai-modal-overlay.show {
  display: flex;
  opacity: 1;
}

.ai-modal {
  width: 90%;
  max-width: 560px;
  background: var(--color-card);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.ai-modal-overlay.show .ai-modal {
  transform: translateY(0);
}

.ai-modal-header {
  padding: 24px 32px;
  background: var(--gradient-xuanqing);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ai-modal-header h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  letter-spacing: 2px;
}

.ai-modal-header .close-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  border: none;
  color: #fff;
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.ai-modal-header .close-btn:hover {
  background: rgba(255,255,255,0.3);
}

.ai-modal-body {
  padding: 32px;
  max-height: 480px;
  overflow-y: auto;
}

.ai-modal-body .chat-area {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 20px;
  min-height: 240px;
}

.ai-modal-body .chat-input-area {
  display: flex;
  gap: 12px;
}

.ai-modal-body .chat-input-area input {
  flex: 1;
  padding: 14px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

.ai-modal-body .chat-input-area input:focus {
  border-color: var(--color-xuanqing);
}

/* ===== 动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===== 联系我们 ===== */
.contact-section { background: var(--color-bg); }

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

.contact-card {
  padding: 32px 24px;
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
}

.contact-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-qianqing-light);
}

.contact-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}

.contact-icon.teal {
  background: var(--color-qianqing-lighter);
  color: var(--color-qianqing);
}

.contact-icon.gold {
  background: var(--color-shengzhe-lighter);
  color: var(--color-shengzhe);
}

.contact-icon.red {
  background: var(--color-dingchi-lighter);
  color: var(--color-dingchi);
}

.contact-label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.contact-value {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
  word-break: break-all;
}

.contact-time {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* ===== 新闻动态板块 v2 ===== */
.news-section { background: var(--color-card); }

.news-row1 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.news-image-box {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  height: 360px;
}

.news-image-carousel {
  position: relative;
  width: 100%;
  height: 100%;
}

.carousel-slide {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.carousel-slide.active {
  opacity: 1;
}

.carousel-content {
  text-align: center;
  color: #fff;
  padding: 24px;
}

.carousel-icon {
  font-size: 64px;
  margin-bottom: 16px;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,.2));
}

.carousel-content h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  margin-bottom: 8px;
  letter-spacing: 2px;
  text-shadow: 0 2px 8px rgba(0,0,0,.3);
}

.carousel-content p {
  font-size: 0.9rem;
  opacity: 0.9;
  letter-spacing: 1px;
}

.carousel-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 2;
}

.carousel-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,.5);
  cursor: pointer;
  transition: all 0.3s;
}

.carousel-dots .dot.active {
  background: #fff;
  transform: scale(1.3);
}

.news-video-box {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  height: 360px;
}

.video-close-btn {
  opacity: 0;
  transition: opacity .3s;
}
.news-video-box:hover .video-close-btn {
  opacity: 1;
}
/* 视频控件自定义样式 */
.news-video-box video::-webkit-media-controls-panel {
  background: linear-gradient(transparent, rgba(0,0,0,.8));
}
.news-video-box video::-webkit-media-controls-play-button {
  color: #fff;
}

.video-cover {
  position: relative;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #1a1a1a 0%, #2c2c2c 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}

.video-cover:hover {
  background: linear-gradient(135deg, #2a2a2a 0%, #3c3c3c 100%);
}

.video-overlay {
  text-align: center;
  color: #fff;
  padding: 24px;
}

.play-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  background: rgba(255,255,255,.2);
  border: 2px solid rgba(255,255,255,.5);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  backdrop-filter: blur(8px);
  transition: all 0.3s;
}

.news-video-box:hover .play-icon {
  transform: scale(1.1);
  background: rgba(255,255,255,.3);
}

.video-tag {
  display: inline-block;
  background: rgba(194,91,78,.85);
  color: #fff;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.8rem;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.video-overlay h4 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.video-overlay p {
  font-size: 0.85rem;
  opacity: 0.7;
}

.news-row2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.news-text-box {
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 2px 12px rgba(0,0,0,.04);
  transition: var(--transition);
}

.news-text-box:hover {
  box-shadow: var(--shadow-md);
}

.news-text-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 16px;
}

.news-text-icon {
  font-size: 32px;
  width: 48px;
  height: 48px;
  background: var(--color-qianqing-lighter);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.news-text-header h4 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--color-text);
  margin-bottom: 4px;
  letter-spacing: 1px;
}

.news-text-header p {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.news-text-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.news-text-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.88rem;
  color: var(--color-text);
  text-decoration: none;
  padding: 8px 0;
  border-bottom: 1px dashed rgba(46,139,139,0.08);
  transition: all 0.2s;
}
.news-text-item .src {
  display: block;
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.news-text-item:hover {
  color: var(--color-qianqing);
  transform: translateX(4px);
}

.news-text-item .date {
  flex-shrink: 0;
  width: 50px;
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-qianqing);
  background: var(--color-qianqing-lighter);
  padding: 2px 0;
  border-radius: 4px;
}

@media (max-width: 768px) {
  .news-row1 { grid-template-columns: 1fr; }
  .news-row2 { grid-template-columns: 1fr; }
  .news-image-box, .news-video-box { height: 280px; }
}

/* ===== 新闻动态板块 ===== */
.news-section { background: var(--color-card); }

.news-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 24px;
}

.news-grid.bottom {
  grid-template-columns: 1fr 1fr;
}

.news-card {
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.news-label {
  padding: 10px 20px;
  background: var(--gradient-qianqing);
  color: #fff;
  font-size: 0.85rem;
  letter-spacing: 2px;
  font-weight: 500;
}

.news-list {
  padding: 20px;
}

.news-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.6;
  cursor: pointer;
  transition: var(--transition);
}

.news-item:last-child {
  border-bottom: none;
}

.news-item:hover {
  color: var(--color-qianqing);
  padding-left: 8px;
}

.news-item::before {
  content: '▸ ';
  color: var(--color-shengzhe);
  font-weight: 700;
}

.carousel-img {
  transition: all 0.5s ease;
}

/* ===== 响应式 ===== */
/* ===== 平板 (≤1024px) ===== */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-text { max-width: 100%; }
  .hero-actions, .hero-stats { justify-content: center; }
  .hero-visual { min-height: 320px; }
  .dual-wheel { width: 280px; height: 280px; }
  .model-showcase { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .opp-list { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-triage { grid-template-columns: 1fr; }
  .course-grid { grid-template-columns: repeat(2, 1fr); }
  .about-content { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .coop-grid { grid-template-columns: 1fr; }
}

/* ===== 手机横屏/小平板 (≤768px) ===== */
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .section { padding: 60px 0; }
  .contact-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .contact-card { padding: 24px 16px; }
  .contact-value { font-size: 1rem; }
  
  /* 导航 */
  .nav-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0; width: 100%;
    background: var(--color-card);
    flex-direction: column; padding: 12px;
    gap: 0; box-shadow: var(--shadow-md);
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { width: 100%; padding: 14px 18px; border-radius: 8px; }
  .nav-toggle { display: flex; }
  .nav-cta .btn-ghost { display: none; }
  .nav-inner { padding: 0 16px; }
  
  /* Hero */
  .hero { min-height: auto; padding: 100px 0 60px; }
  .hero-title { font-size: 1.8rem; letter-spacing: 2px; }
  .hero-desc { font-size: 0.92rem; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stat .stat-num { font-size: 1.5rem; }
  .hero-visual { display: none; }
  .hero-badge { font-size: 0.78rem; }
  
  /* 标题 */
  .section-title .title-main { font-size: 1.5rem; letter-spacing: 2px; }
  .section-title .title-sub { font-size: 0.9rem; }
  
  /* 核心定位 */
  .core-grid { grid-template-columns: 1fr; }
  
  /* 产品卡片 */
  .product-card { padding: 24px 20px; }
  .product-features { gap: 6px; }
  .product-features .pf-tag { font-size: 0.72rem; padding: 3px 8px; }
  
  /* 商机 */
  .opp-list { grid-template-columns: 1fr; }
  .opp-filters { gap: 6px; }
  .opp-filter { padding: 6px 14px; font-size: 0.8rem; }
  
  /* 专家 */
  .expert-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .expert-card { padding: 24px 16px; }
  .expert-avatar { width: 64px; height: 64px; }
  
  /* 课程 */
  .course-grid { grid-template-columns: 1fr; }
  .school-tabs { gap: 6px; }
  .school-tab { padding: 8px 16px; font-size: 0.82rem; }
  
  /* 模型 */
  .model-showcase { padding: 28px 20px; }
  .model-diagram { max-width: 300px; margin: 0 auto; }
  .model-features { grid-template-columns: 1fr 1fr; gap: 10px; }
  .model-feature { padding: 10px 12px; }
  .model-info .model-title { font-size: 1.3rem; }
  
  /* 政企合作 */
  .coop-grid { grid-template-columns: 1fr; }
  .coop-card { padding: 24px; flex-direction: column; }
  .cases-showcase { grid-template-columns: 1fr; }
  
  /* 关于我们 */
  .about-content { grid-template-columns: 1fr; }
  .about-values { grid-template-columns: 1fr 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .about-stat-card { padding: 20px 16px; }
  .about-stat-card .as-num { font-size: 1.6rem; }
  
  /* AI自测横幅 */
  .ai-test-banner { flex-direction: column; text-align: center; padding: 28px 20px; }
  .ai-test-content h3 { font-size: 1.3rem; }
  
  /* 智能分诊 */
  .ai-triage { padding: 28px 20px; }
  
  /* 页脚 */
  .footer { padding: 40px 0 24px; }
  .footer-main { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  
  /* 浮动按钮 */
  .float-consult { right: 12px; bottom: 16px; }
  .float-btn { width: 48px; height: 48px; }
  
  /* AI弹窗满屏 */
  .ai-modal { width: 100%; max-width: 100%; height: 100%; border-radius: 0; }
  .ai-modal-header { padding: 18px 20px; }
  .ai-modal-body { padding: 20px; }
}

/* ===== 手机竖屏 (≤480px) ===== */
@media (max-width: 480px) {
  .hero-title { font-size: 1.5rem; }
  .hero-desc { font-size: 0.85rem; line-height: 1.7; }
  .hero-actions .btn { font-size: 0.85rem; padding: 12px 20px; }
  .hero-stats { gap: 16px; }
  .hero-stat .stat-num { font-size: 1.3rem; }
  .hero-stat .stat-label { font-size: 0.75rem; }
  
  .section-title .title-main { font-size: 1.3rem; }
  
  .expert-grid { grid-template-columns: 1fr; }
  .about-values { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; gap: 12px; }
  
  .nav-logo .logo-text { font-size: 1.1rem; }
  .nav-logo .logo-sub { font-size: 0.65rem; }
  
  .model-features { grid-template-columns: 1fr; }
  
  /* 导航按钮更紧凑 */
  .nav-cta .btn { font-size: 0.8rem; padding: 8px 14px; }
  
  /* 产品卡片更紧凑 */
  .product-name { font-size: 1.1rem; }
  .product-desc { font-size: 0.82rem; }
  
  /* AI自测 */
  .ai-test-btn { width: 100%; text-align: center; }
}