/* ============================================================
   ctshe.cn 智慧家庭装维技术交流平台 全局样式
   非官方平台 · 非中国电信官方运营
   主色：电信蓝 #0B4B9C   辅助：智慧绿 #00B4A0
   ============================================================ */

:root {
  --blue: #0B4B9C;
  --blue-dark: #083A7A;
  --blue-light: #1E6FD9;
  --green: #00B4A0;
  --bg-light: #F5F8FC;
  --text: #2B2F36;
  --text-gray: #6B7280;
  --border: #E4E9F0;
  --radius: 10px;
  --shadow: 0 4px 18px rgba(11, 75, 156, .08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------- 头部 ---------- */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,.04);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-img { width: 200px; height: 60px; display: block; object-fit: contain; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 9px;
  background: linear-gradient(135deg, var(--blue), var(--blue-light, #3A8FDD));
  color: #fff; font-weight: 800; font-size: 17px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 3px 8px rgba(11,75,156,.3);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.25; }
.logo-text strong { font-size: 19px; color: var(--blue); letter-spacing: .5px; }
.logo-text small { font-size: 11.5px; color: var(--text-gray); }

.main-nav ul { display: flex; gap: 4px; }
.main-nav a {
  display: block; padding: 8px 14px; font-size: 15px; color: #333;
  border-radius: 6px; transition: .2s;
}
.main-nav a:hover { color: var(--blue); background: var(--bg-light); }
.main-nav a.active { color: #fff; background: var(--blue); }

.header-phone { display: flex; align-items: center; gap: 6px; font-size: 16px; font-weight: 700; color: var(--blue); }
.tel-icon { font-size: 18px; }
.nav-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--blue); cursor: pointer; }

/* ---------- 通用区块 ---------- */
.section { padding: 70px 0; }
.section-alt { background: var(--bg-light); }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head .en { font-size: 13px; letter-spacing: 3px; color: var(--blue); text-transform: uppercase; }
.section-head h2 { font-size: 30px; color: #111; margin-top: 8px; }
.section-head p { color: var(--text-gray); margin-top: 10px; max-width: 640px; margin-left: auto; margin-right: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 11px 26px; border-radius: 30px;
  font-size: 15px; font-weight: 600; transition: .25s; border: none; cursor: pointer;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); transform: translateY(-2px); box-shadow: 0 6px 16px rgba(11,75,156,.35); }
.btn-green { background: var(--green); color: #fff; }
.btn-outline { border: 2px solid var(--blue); color: var(--blue); background: transparent; }
.btn-outline:hover { background: var(--blue); color: #fff; }
.btn-light { background: #fff; color: var(--blue); }
.btn-light:hover { background: var(--bg-light); }

/* ---------- 卡片 ---------- */
.card {
  background: #fff; border-radius: var(--radius);
  box-shadow: var(--shadow); border: 1px solid var(--border);
  transition: transform .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-5px); box-shadow: 0 10px 26px rgba(11,75,156,.14); }

/* ---------- 首页 Banner ---------- */
.hero {
  background: linear-gradient(120deg, #062A5C 0%, var(--blue) 55%, #1A6BD0 100%);
  color: #fff; padding: 90px 0 100px; position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; right: -120px; top: -80px;
  width: 460px; height: 460px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,.12) 0%, transparent 70%);
}
.hero-inner { display: flex; align-items: center; gap: 60px; position: relative; z-index: 2; }
.hero-text { flex: 1.1; }
.hero-badge {
  display: inline-block; padding: 6px 16px; border-radius: 30px;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.3);
  font-size: 13px; margin-bottom: 18px;
}
.hero-text h1 { font-size: 44px; line-height: 1.25; font-weight: 800; letter-spacing: 1px; }
.hero-text h1 span { color: #6FD8C8; }
.hero-text p { margin-top: 18px; font-size: 17px; color: rgba(255,255,255,.85); max-width: 560px; }
.hero-actions { margin-top: 30px; display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 44px; margin-top: 40px; }
.hero-stat b { font-size: 28px; display: block; color: #fff; }
.hero-stat span { font-size: 13px; color: rgba(255,255,255,.75); }
.hero-visual { flex: .9; display: flex; justify-content: center; }
.hero-illustration {
  width: 100%; max-width: 460px; aspect-ratio: 4/3; border-radius: 16px;
  background: linear-gradient(145deg, rgba(255,255,255,.16), rgba(255,255,255,.05));
  border: 1px solid rgba(255,255,255,.25);
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; color: rgba(255,255,255,.8);
}

/* ---------- 服务卡片 ---------- */
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.service-card { padding: 30px 24px; text-align: center; }
.service-icon {
  width: 64px; height: 64px; margin: 0 auto 18px; border-radius: 18px;
  background: linear-gradient(135deg, var(--blue), var(--blue-light));
  color: #fff; font-size: 30px; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 18px rgba(11,75,156,.28);
}
.service-card h3 { font-size: 18px; margin-bottom: 8px; }
.service-card p { color: var(--text-gray); font-size: 14px; margin-bottom: 16px; }
.service-card .btn { padding: 8px 22px; font-size: 14px; }

/* ---------- 特性 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.feature-item { display: flex; gap: 16px; padding: 26px; }
.feature-item .fi-icon {
  width: 50px; height: 50px; flex: 0 0 50px; border-radius: 12px;
  background: var(--bg-light); color: var(--blue);
  display: flex; align-items: center; justify-content: center; font-size: 24px;
}
.feature-item h4 { font-size: 17px; margin-bottom: 6px; }
.feature-item p { color: var(--text-gray); font-size: 14px; }

/* ---------- 百科卡片 ---------- */
.wiki-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.wiki-card { padding: 26px; }
.wiki-card .tag {
  display: inline-block; padding: 3px 12px; border-radius: 20px; font-size: 12px;
  background: var(--bg-light); color: var(--blue); margin-bottom: 12px;
}
.wiki-card h3 { font-size: 17px; margin-bottom: 8px; line-height: 1.5; }
.wiki-card h3 a:hover { color: var(--blue); }
.wiki-card p { color: var(--text-gray); font-size: 14px; }
.wiki-card .meta { margin-top: 14px; font-size: 12.5px; color: #9AA3B0; display: flex; gap: 14px; }

/* ---------- 新闻卡片 ---------- */
.news-list { display: flex; flex-direction: column; gap: 18px; }
.news-item { display: flex; gap: 22px; padding: 22px 26px; align-items: center; }
.news-date {
  flex: 0 0 74px; text-align: center; padding: 10px 0;
  background: var(--bg-light); border-radius: 10px; color: var(--blue);
}
.news-date b { display: block; font-size: 22px; line-height: 1.2; }
.news-date span { font-size: 12px; }
.news-item h3 { font-size: 17px; margin-bottom: 6px; }
.news-item h3 a:hover { color: var(--blue); }
.news-item p { color: var(--text-gray); font-size: 14px; }

/* ---------- 页头横幅 ---------- */
.page-hero {
  background: linear-gradient(120deg, #062A5C, var(--blue));
  color: #fff; padding: 54px 0; text-align: center;
}
.page-hero h1 { font-size: 34px; }
.page-hero p { margin-top: 10px; color: rgba(255,255,255,.85); font-size: 15px; }

/* ---------- 关于 ---------- */
.about-intro { display: flex; gap: 50px; align-items: center; }
.about-text { flex: 1.1; }
.about-text h2 { font-size: 26px; margin-bottom: 16px; }
.about-text p { color: var(--text-gray); margin-bottom: 12px; }
.about-img {
  flex: .9; aspect-ratio: 4/3; border-radius: 14px;
  background: linear-gradient(145deg, var(--bg-light), #E3EEFB);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-gray); font-size: 15px; border: 1px solid var(--border);
}
.about-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 56px; }
.about-card { text-align: center; padding: 30px 20px; }
.about-card b { font-size: 36px; color: var(--blue); display: block; }
.about-card span { color: var(--text-gray); font-size: 14px; }

/* ---------- 服务详情 ---------- */
.service-detail { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; }
.sd-block { margin-bottom: 26px; }
.sd-block h3 { font-size: 20px; color: var(--blue); margin-bottom: 12px; padding-left: 12px; border-left: 4px solid var(--blue); }
.sd-block p { color: var(--text-gray); margin-bottom: 8px; }
.check-list li { padding: 8px 0 8px 30px; position: relative; color: var(--text-gray); border-bottom: 1px dashed var(--border); }
.check-list li::before {
  content: "✓"; position: absolute; left: 4px; color: var(--green); font-weight: 700;
}
.sd-side { position: sticky; top: 90px; align-self: start; }
.price-box { background: var(--bg-light); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.price-box h4 { margin-bottom: 10px; color: var(--blue); }
.price-box p { font-size: 14px; color: var(--text-gray); margin-bottom: 14px; }

/* ---------- 文章 ---------- */
.article-page { max-width: 820px; margin: 0 auto; }
.article-title { font-size: 28px; line-height: 1.45; margin-bottom: 14px; }
.article-meta { color: var(--text-gray); font-size: 13.5px; display: flex; gap: 18px; margin-bottom: 26px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.article-content { font-size: 15.5px; line-height: 1.9; color: #333; }
.article-content h3 { margin: 28px 0 12px; font-size: 20px; color: var(--blue); }
.article-content p { margin-bottom: 14px; }
.article-content ul, .article-content ol { padding-left: 24px; margin-bottom: 14px; }
.article-content li { margin-bottom: 6px; }
.article-content table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.article-content th, .article-content td { border: 1px solid var(--border); padding: 9px 12px; font-size: 14px; }
.article-content th { background: var(--bg-light); color: var(--blue); }
.article-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--border); }

/* ---------- 列表分页 ---------- */
.list-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.list-card { padding: 26px; }
.list-card .meta { color: var(--text-gray); font-size: 12.5px; margin-top: 12px; display: flex; gap: 14px; }
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 40px; }
.pagination a, .pagination span {
  padding: 8px 15px; border-radius: 6px; border: 1px solid var(--border); font-size: 14px;
}
.pagination .current { background: var(--blue); color: #fff; border-color: var(--blue); }
.pagination a:hover { border-color: var(--blue); color: var(--blue); }

/* ---------- 工具页（v2 轻量扁平化风格） ---------- */
.tools-section { background: #f8fafc; padding: 56px 0 72px; }
.tools-section .container { max-width: 1160px; }

/* 分类大标题：橙色圆点 + 深灰粗体 */
.tools-cat-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 21px; font-weight: 700; color: #1e293b;
  margin-bottom: 24px;
}
.tools-cat-title .cat-dot {
  flex: 0 0 8px; width: 8px; height: 8px; border-radius: 50%;
  background: #F97316;
}

/* 子分类标题 */
.tools-subcat-title {
  font-size: 16px; font-weight: 600; color: #475569;
  margin-top: 36px; margin-bottom: 18px;
  padding-left: 2px;
}

/* 工具介绍说明文字 */
.tools-intro {
  font-size: 14px; color: #64748b; margin-bottom: 8px;
}
.tools-intro a { color: var(--blue); font-weight: 600; }
.tools-intro a:hover { text-decoration: underline; }

/* 4列卡片网格 */
.tools-grid-v2 {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}

/* 工具卡片：白底、圆角、极淡阴影、左对齐 */
.tool-card-v2 {
  display: block; background: #fff; border: 1px solid #f1f5f9;
  border-radius: 10px; padding: 22px 18px;
  transition: transform .25s, box-shadow .25s, border-color .25s;
  cursor: pointer;
}
.tool-card-v2:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(15,23,42,.08);
  border-color: #e2e8f0;
}

/* 圆形图标容器 */
.tool-card-v2 .tcv2-icon {
  width: 44px; height: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; margin-bottom: 12px;
}
.tool-card-v2 h4 {
  font-size: 15px; font-weight: 600; color: #1e293b;
  margin-bottom: 6px;
}
.tool-card-v2 p {
  font-size: 13px; color: #64748b; line-height: 1.5;
}

/* 计算器面板卡片 */
.tool-form-card { padding: 32px !important; }
.tool-form-title {
  font-size: 20px; font-weight: 700; color: #1e293b; margin-bottom: 6px;
}
.tool-form-desc {
  font-size: 14px; color: #64748b; margin-bottom: 22px; line-height: 1.6;
}
.tool-panel { max-width: 860px; margin: 0 auto; }
.tool-form { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; color: #334155; margin-bottom: 6px; font-weight: 600; }
.form-group input, .form-group select {
  width: 100%; padding: 10px 14px; border: 1px solid #e2e8f0; border-radius: 8px;
  font-size: 15px; outline: none; transition: .2s; font-family: inherit; background: #fff;
}
.form-group input:focus, .form-group select:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(11,75,156,.1); }
.tool-result {
  margin-top: 8px; padding: 22px; border-radius: 10px; background: #f8fafc;
  border: 1px solid #e2e8f0; font-size: 15px;
}
.tool-result .tr-line { margin-bottom: 8px; }
.tool-result b { color: var(--blue); font-size: 18px; }
.tool-note { margin-top: 14px; font-size: 13px; color: #64748b; }
.calc-table { width: 100%; border-collapse: collapse; margin-top: 18px; font-size: 14px; }
.calc-table th, .calc-table td { border: 1px solid #e2e8f0; padding: 9px 14px; }
.calc-table th { background: #f1f5f9; color: #1e293b; font-weight: 600; }
.calc-table tbody tr:hover { background: #f8fafc; }

/* ---------- 培训 ---------- */
.training-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.training-card { padding: 30px; }
.training-card .level-tag {
  display: inline-block; padding: 3px 12px; border-radius: 20px; font-size: 12px;
  background: var(--bg-light); color: var(--blue); margin-bottom: 12px;
}
.training-card h3 { font-size: 19px; margin-bottom: 10px; }
.training-card p { color: var(--text-gray); font-size: 14px; margin-bottom: 16px; }
.training-card .outline { padding-left: 20px; margin-bottom: 16px; }
.training-card .outline li { list-style: disc; color: var(--text-gray); font-size: 14px; padding: 3px 0; }
.training-card .tr-info { display: flex; gap: 18px; color: var(--text-gray); font-size: 13px; margin-bottom: 16px; }
.cert-strip { background: linear-gradient(120deg, #062A5C, var(--blue)); color: #fff; text-align: center; padding: 56px 20px; border-radius: 14px; }
.cert-strip h2 { font-size: 26px; margin-bottom: 12px; }
.cert-strip p { color: rgba(255,255,255,.85); margin-bottom: 20px; }

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; }
.contact-info h3 { font-size: 22px; margin-bottom: 18px; }
.ci-item { display: flex; gap: 14px; margin-bottom: 20px; }
.ci-item .ci-icon {
  width: 46px; height: 46px; flex: 0 0 46px; border-radius: 12px;
  background: var(--bg-light); color: var(--blue); display: flex; align-items: center; justify-content: center; font-size: 22px;
}
.ci-item b { display: block; font-size: 15px; }
.ci-item span { color: var(--text-gray); font-size: 14px; }
.contact-form { background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 30px; box-shadow: var(--shadow); }
.contact-form h3 { margin-bottom: 18px; color: var(--blue); }
.contact-form .form-group { margin-bottom: 16px; }
.contact-form input, .contact-form select, .contact-form textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 15px; outline: none; font-family: inherit; transition: .2s;
}
.contact-form textarea { min-height: 110px; resize: vertical; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
  border-color: var(--blue); box-shadow: 0 0 0 3px rgba(11,75,156,.12);
}
.alert { padding: 13px 18px; border-radius: 8px; margin-bottom: 18px; font-size: 14.5px; }
.alert-success { background: #E7F9F0; color: #0A7A48; border: 1px solid #B4E8CD; }
.alert-error { background: #FDECEC; color: #B02A37; border: 1px solid #F5C6CB; }

/* ---------- 底部 ---------- */
.site-footer { background: #0A1E3C; color: #B9C6DB; margin-top: 60px; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px;
  padding: 52px 0 36px;
}
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-logo .logo-img { width: 180px; height: 54px; }
.footer-logo strong { color: #fff; font-size: 18px; }
.footer-slogan { color: #7FD6C6; font-size: 15px; margin-bottom: 10px; }
.footer-desc { font-size: 13.5px; line-height: 1.8; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; font-size: 14px; }
.footer-col ul li a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); padding: 18px 0;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 13px;
}
.footer-bottom a:hover { color: #fff; }

/* (旧 iswok 工具卡片区已合并到工具页 v2 样式) */

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .services-grid, .feature-grid, .about-cards { grid-template-columns: repeat(2, 1fr); }
  .wiki-grid, .list-grid, .tool-grid { grid-template-columns: repeat(2, 1fr); }
  .tools-grid-v2 { grid-template-columns: repeat(3, 1fr); }
  .hero-inner { flex-direction: column; gap: 40px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .service-detail, .contact-grid { grid-template-columns: 1fr; }
  .about-intro { flex-direction: column; }
}
@media (max-width: 768px) {
  .main-nav {
    position: fixed; top: 68px; left: 0; right: 0; background: #fff;
    border-bottom: 1px solid var(--border); padding: 10px 20px;
    transform: translateY(-150%); transition: .3s; box-shadow: var(--shadow); z-index: 99;
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav ul { flex-direction: column; }
  .nav-toggle { display: block; }
  .header-phone { display: none; }
  .hero-text h1 { font-size: 32px; }
  .services-grid, .feature-grid, .wiki-grid, .list-grid, .tool-grid,
  .about-cards, .training-grid, .footer-grid, .tools-grid-v2 { grid-template-columns: 1fr; }
  .tool-form { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .section { padding: 48px 0; }
  .news-item { flex-direction: column; align-items: flex-start; }
}