/* ===================================================
   十五五重点项目投资筹划在线 - 全站样式表
   风格：庄重、权威、可信、政务感
   =================================================== */

/* --- Google Fonts 引入 --- */
@import url('https://fonts.googleapis.cn/css2?family=Noto+Serif+SC:wght@400;600;700&display=swap');

/* --- CSS 变量 --- */
:root {
  --color-primary-dark: #1a365d;
  --color-primary-mid: #2c5282;
  --color-primary-light: #3a6db5;
  --color-gold: #c6930a;
  --color-gold-light: #d4a832;
  --color-red: #c53030;
  --color-red-hover: #9b2c2c;
  --color-bg-warm: #faf9f7;
  --color-bg-gray: #f0ede8;
  --color-text: #2d3748;
  --color-text-secondary: #718096;
  --color-border: #e2ddd5;
  --font-serif: 'Noto Serif SC', 'SimSun', 'STSong', serif;
  --font-sans: -apple-system, 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1200px;
  --radius: 4px;
  --transition: 300ms ease;
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg-warm);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

/* --- 顶部栏 --- */
.top-bar {
  background: var(--color-primary-dark);
  color: #fff;
  font-size: 14px;
  padding: 8px 0;
}
.top-bar .container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.top-bar .site-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.05em;
}
.top-bar .site-name .gold-line {
  display: inline-block;
  width: 2px;
  height: 16px;
  background: var(--color-gold);
  margin: 0 12px;
  vertical-align: middle;
}
.top-bar .contact-info {
  display: flex;
  align-items: center;
  gap: 16px;
}
.top-bar .contact-info span {
  opacity: 0.85;
}
.top-bar .contact-info a {
  color: #fff;
  opacity: 0.85;
}
.top-bar .contact-info a:hover {
  opacity: 1;
  color: var(--color-gold-light);
}

/* --- 导航栏 --- */
.main-nav {
  background: #fff;
  border-bottom: 3px solid var(--color-gold);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.main-nav .container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: stretch;
}
.nav-list {
  display: flex;
  width: 100%;
}
.nav-item {
  position: relative;
  flex: 1;
  text-align: center;
}
.nav-item > a {
  display: block;
  padding: 16px 8px;
  color: var(--color-text);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.03em;
  transition: background var(--transition), color var(--transition);
  border-bottom: 3px solid transparent;
  margin-bottom: -3px;
}
.nav-item > a:hover,
.nav-item.active > a {
  background: rgba(44, 82, 130, 0.06);
  color: var(--color-primary-mid);
}
.nav-item.active > a {
  border-bottom-color: var(--color-gold);
}

/* 下拉菜单 */
.dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 100%;
  background: #fff;
  border: 1px solid var(--color-border);
  border-top: 2px solid var(--color-gold);
  box-shadow: 0 6px 20px rgba(0,0,0,0.1);
  z-index: 1001;
  animation: fadeIn 250ms ease-out;
}
.nav-item:hover .dropdown {
  display: block;
}
.dropdown a {
  display: block;
  padding: 12px 20px;
  color: var(--color-text);
  font-size: 14px;
  font-weight: 400;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
  border-left: 3px solid transparent;
}
.dropdown a:hover {
  background: rgba(44, 82, 130, 0.06);
  color: var(--color-primary-mid);
  border-left-color: var(--color-gold);
}

/* 多列下拉菜单 */
.dropdown.dropdown-cols {
  display: none;
  column-count: 2;
  column-gap: 0;
  column-rule: 1px solid var(--color-border);
  min-width: 480px;
  max-width: 600px;
  left: 50%;
  transform: translateX(-50%);
}
.nav-item:hover .dropdown.dropdown-cols {
  display: block;
}
.dropdown.dropdown-cols a {
  break-inside: avoid;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Hero 区 --- */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary-mid) 60%, #3a6db5 100%);
  color: #fff;
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 80px,
      rgba(255,255,255,0.03) 80px,
      rgba(255,255,255,0.03) 81px
    ),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 80px,
      rgba(255,255,255,0.03) 80px,
      rgba(255,255,255,0.03) 81px
    );
  pointer-events: none;
}
.hero .container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}
.hero h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 36px;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
.hero h1 .gold-accent {
  color: var(--color-gold-light);
}
.hero .subtitle {
  font-size: 18px;
  opacity: 0.9;
  line-height: 1.6;
  max-width: 700px;
  margin-bottom: 30px;
}
.hero .hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hero .hero-tag {
  display: inline-block;
  background: rgba(198,147,10,0.2);
  border: 1px solid rgba(198,147,10,0.4);
  color: var(--color-gold-light);
  padding: 6px 16px;
  font-size: 13px;
  border-radius: var(--radius);
  letter-spacing: 0.03em;
}

/* 子页面 Hero */
.hero-sub {
  padding: 50px 0 40px;
}
.hero-sub h1 {
  font-size: 28px;
  margin-bottom: 10px;
}
.hero-sub .subtitle {
  font-size: 16px;
}

/* --- 面包屑 --- */
.breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 20px;
  font-size: 14px;
  color: var(--color-text-secondary);
}
.breadcrumb a {
  color: var(--color-text-secondary);
}
.breadcrumb a:hover {
  color: var(--color-primary-mid);
}
.breadcrumb .sep {
  margin: 0 6px;
  color: #ccc;
}

/* --- 内容区 --- */
.content-section {
  padding: 50px 0;
}
.content-section.alt-bg {
  background: var(--color-bg-gray);
}
.content-section .container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 24px;
  color: var(--color-primary-dark);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-gold);
  letter-spacing: 0.04em;
  position: relative;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--color-gold);
}

/* 内容段落 */
.content-text {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 1.2em;
}
.content-text p {
  margin-bottom: 1.2em;
}

/* --- 卡片网格 --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 24px;
}
.card-grid.cols-2 {
  grid-template-columns: repeat(2, 1fr);
}
.card-grid.cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}
.card .card-icon {
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-gold);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--color-gold);
  font-size: 22px;
  font-weight: 700;
  font-family: var(--font-serif);
}
.card h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 18px;
  color: var(--color-primary-dark);
  margin-bottom: 10px;
  letter-spacing: 0.03em;
}
.card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- 列表样式 --- */
.styled-list {
  padding-left: 0;
}
.styled-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
  line-height: 1.7;
  position: relative;
  padding-left: 20px;
}
.styled-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20px;
  width: 8px;
  height: 8px;
  border: 2px solid var(--color-gold);
  border-radius: 50%;
}
.styled-list li:last-child {
  border-bottom: none;
}

/* 编号列表 */
.numbered-list {
  counter-reset: item;
  padding-left: 0;
}
.numbered-list li {
  padding: 14px 0 14px 44px;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
  line-height: 1.7;
  position: relative;
  counter-increment: item;
}
.numbered-list li::before {
  content: counter(item, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 14px;
  width: 32px;
  height: 32px;
  background: var(--color-primary-dark);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
}

/* --- 按钮 --- */
.btn {
  display: inline-block;
  padding: 12px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  letter-spacing: 0.03em;
  text-align: center;
}
.btn:active {
  transform: scale(0.98);
}
.btn-primary {
  background: var(--color-primary-dark);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-mid);
  color: #fff;
  transform: scale(1.02);
}
.btn-gold {
  background: var(--color-gold);
  color: #fff;
}
.btn-gold:hover {
  background: var(--color-gold-light);
  color: #fff;
  transform: scale(1.02);
}
.btn-red {
  background: var(--color-red);
  color: #fff;
}
.btn-red:hover {
  background: var(--color-red-hover);
  color: #fff;
  transform: scale(1.02);
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--color-primary-dark);
  color: var(--color-primary-dark);
}
.btn-outline:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: scale(1.02);
}

/* --- 表格 --- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-top: 16px;
}
.data-table th {
  background: var(--color-primary-dark);
  color: #fff;
  font-weight: 600;
  padding: 12px 16px;
  text-align: left;
  letter-spacing: 0.03em;
}
.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
}
.data-table tr:hover td {
  background: rgba(44, 82, 130, 0.04);
}

/* --- 信息提示框 --- */
.info-box {
  background: rgba(44, 82, 130, 0.06);
  border-left: 4px solid var(--color-primary-mid);
  padding: 20px 24px;
  margin: 24px 0;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.info-box.gold {
  background: rgba(198, 147, 10, 0.08);
  border-left-color: var(--color-gold);
}
.info-box.red {
  background: rgba(197, 48, 48, 0.06);
  border-left-color: var(--color-red);
}
.info-box h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 16px;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}
.info-box p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}

/* --- 标签 --- */
.tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius);
  letter-spacing: 0.03em;
}
.tag-red {
  background: rgba(197, 48, 48, 0.1);
  color: var(--color-red);
  border: 1px solid rgba(197, 48, 48, 0.2);
}
.tag-gold {
  background: rgba(198, 147, 10, 0.1);
  color: var(--color-gold);
  border: 1px solid rgba(198, 147, 10, 0.2);
}
.tag-blue {
  background: rgba(44, 82, 130, 0.1);
  color: var(--color-primary-mid);
  border: 1px solid rgba(44, 82, 130, 0.2);
}

/* --- CTA 区块 --- */
.cta-section {
  background: var(--color-primary-dark);
  color: #fff;
  padding: 60px 0;
  text-align: center;
}
.cta-section .container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}
.cta-section h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 26px;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}
.cta-section p {
  font-size: 16px;
  opacity: 0.85;
  margin-bottom: 28px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* --- 流程图 --- */
.process-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  margin: 30px 0;
}
.process-step {
  flex: 1;
  min-width: 140px;
  max-width: 200px;
  text-align: center;
  position: relative;
  padding: 0 10px;
}
.process-step .step-num {
  width: 48px;
  height: 48px;
  background: var(--color-primary-dark);
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
  border-radius: var(--radius);
}
.process-step .step-title {
  font-weight: 600;
  font-size: 14px;
  color: var(--color-primary-dark);
  margin-bottom: 6px;
}
.process-step .step-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}
.process-step::after {
  content: '\2192';
  position: absolute;
  right: -10px;
  top: 14px;
  font-size: 24px;
  color: var(--color-gold);
}
.process-step:last-child::after {
  display: none;
}

/* --- 特色统计 --- */
.stats-row {
  display: flex;
  justify-content: center;
  gap: 60px;
  padding: 40px 0;
}
.stat-item {
  text-align: center;
}
.stat-item .stat-num {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 42px;
  color: var(--color-gold);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-item .stat-label {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* --- 首页专题入口 --- */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 24px;
}
.topic-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}
.topic-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}
.topic-card .topic-header {
  background: var(--color-primary-dark);
  padding: 20px 24px;
  color: #fff;
}
.topic-card .topic-header h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.topic-card .topic-header .topic-tag {
  font-size: 12px;
  color: var(--color-gold-light);
  opacity: 0.9;
}
.topic-card .topic-body {
  padding: 20px 24px;
}
.topic-card .topic-body p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}
.topic-card .topic-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary-mid);
  letter-spacing: 0.03em;
}
.topic-card .topic-link:hover {
  color: var(--color-gold);
}

/* --- Footer --- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.8);
  padding: 48px 0 0;
}
.site-footer .container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(198,147,10,0.3);
}
.footer-brand .footer-logo {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 20px;
  color: #fff;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 360px;
}
.footer-contact h4,
.footer-nav-col h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 16px;
  color: var(--color-gold-light);
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}
.footer-contact p,
.footer-contact a {
  font-size: 14px;
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
}
.footer-contact a:hover {
  color: var(--color-gold-light);
}
.footer-nav-col ul li {
  margin-bottom: 8px;
}
.footer-nav-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,0.75);
  transition: color var(--transition);
}
.footer-nav-col ul li a:hover {
  color: var(--color-gold-light);
}
.footer-bottom {
  text-align: center;
  padding: 20px 0;
  margin-top: 24px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  border-top: 1px solid rgba(255,255,255,0.1);
}

/* --- 移动端适配 --- */
@media (max-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .card-grid.cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .topic-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-row {
    gap: 30px;
  }
  .stat-item .stat-num {
    font-size: 32px;
  }
}

@media (max-width: 768px) {
  .top-bar .container {
    flex-direction: column;
    gap: 4px;
    text-align: center;
  }
  .nav-list {
    flex-direction: column;
  }
  .nav-item > a {
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border);
  }
  .dropdown {
    position: static;
    border: none;
    border-top: none;
    box-shadow: none;
    display: none;
  }
  .nav-item:hover .dropdown,
  .nav-item.open .dropdown {
    display: block;
  }
  .dropdown a {
    padding-left: 32px;
  }
  .hero {
    padding: 50px 0 40px;
  }
  .hero h1 {
    font-size: 24px;
  }
  .hero .subtitle {
    font-size: 15px;
  }
  .card-grid,
  .card-grid.cols-2,
  .card-grid.cols-4 {
    grid-template-columns: 1fr;
  }
  .topic-grid {
    grid-template-columns: 1fr;
  }
  .stats-row {
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }
  .process-steps {
    flex-direction: column;
    align-items: center;
  }
  .process-step::after {
    content: '\2193';
    right: auto;
    top: auto;
    bottom: -24px;
    left: 50%;
    transform: translateX(-50%);
  }
  .footer-top {
    flex-direction: column;
    gap: 24px;
  }
  .footer-brand p {
    max-width: 100%;
  }
  .section-title {
    font-size: 20px;
  }
}

/* --- 动效 --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 400ms ease-out, transform 400ms ease-out;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- FAQ 区块 (GEO) --- */
.faq-item {
  margin-bottom: 20px;
  padding: 20px 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.faq-item h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 16px;
  color: var(--color-primary-dark);
  margin-bottom: 10px;
  letter-spacing: 0.03em;
  padding-left: 16px;
  border-left: 3px solid var(--color-gold);
}
.faq-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  padding-left: 16px;
}

/* --- 专业性声明 (EEAT-S) --- */
.expertise-badge {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 12px 20px;
  background: #f0ede8;
  border-left: 4px solid var(--color-gold);
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* --- 广告通栏 --- */
.ad-banner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}
.ad-banner a {
  display: block;
}
.ad-banner img {
  width: 100%;
  height: auto;
  border-radius: 4px;
  display: block;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  transition: box-shadow 0.3s;
}
.ad-banner a:hover img {
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

/* --- 辅助 --- */
.text-center { text-align: center; }
.text-gold { color: var(--color-gold); }
.text-red { color: var(--color-red); }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }