/* ============================================================
   安全快答 · 快答科技安全生产技术服务平台
   设计系统：安全深蓝 + 警示红 + 深灰 + 纯白
   风格：专业严谨 / 科技商务 / 稳重官方 / 全站响应式
   ============================================================ */

:root {
  /* 主色板 */
  --primary: #0F4C81;          /* 安全深蓝（主色） */
  --primary-dark: #0A3558;     /* 深蓝-深 */
  --primary-deep: #082B47;     /* 深蓝-更深（页脚/底图） */
  --primary-light: #1E6BB8;    /* 深蓝-亮 */
  --sky: #EAF2FA;              /* 深蓝-极浅背景 */
  --accent: #C8102E;           /* 警示红（强调） */
  --accent-dark: #9E0C24;      /* 警示红-深 */
  --amber: #F5A623;            /* 警示黄（细节点缀） */
  /* 中性色 */
  --ink: #1F2933;              /* 主文字 */
  --gray: #5B6B7B;             /* 次要文字 */
  --gray-light: #8A99A8;       /* 辅助文字 */
  --line: #DDE4EC;             /* 边框 */
  --bg: #FFFFFF;
  --bg-light: #F4F7FA;         /* 浅灰区块背景 */
  --bg-deep: #0A3558;
  /* 尺寸 */
  --container: 1200px;
  --radius: 6px;
  --shadow: 0 2px 10px rgba(10, 53, 88, 0.08);
  --shadow-lg: 0 10px 30px rgba(10, 53, 88, 0.12);
  --font: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
}

/* ============ 基础重置 ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--accent); }
ul, ol { list-style: none; }
h1, h2, h3, h4 { line-height: 1.35; font-weight: 700; color: var(--primary-dark); }
::selection { background: var(--primary); color: #fff; }

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

/* ============ 通用组件 ============ */

/* 版块标题 */
.section { padding: 72px 0; }
.section--light { background: var(--bg-light); }
.section--deep { background: linear-gradient(135deg, var(--primary-deep), var(--primary-dark)); }
.section-head { margin-bottom: 44px; }
.section-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: 2px;
  color: var(--accent); text-transform: uppercase;
}
.section-tag::before { content: ""; width: 26px; height: 3px; background: var(--accent); }
.section-title { font-size: 30px; margin: 10px 0 8px; letter-spacing: 1px; }
.section-sub { color: var(--gray); font-size: 15px; max-width: 720px; }
.section-head--center { text-align: center; }
.section-head--center .section-tag { justify-content: center; }
.section-head--center .section-sub { margin: 0 auto; }
.section-head--white .section-title { color: #fff; }
.section-head--white .section-sub { color: rgba(255,255,255,.75); }
.section-head--white .section-tag { color: var(--amber); }
.section-head--white .section-tag::before { background: var(--amber); }

/* 安全警示斜纹（装饰条） */
.hazard-stripe {
  height: 6px;
  background: repeating-linear-gradient(-45deg, var(--accent) 0 14px, #fff 14px 28px);
}
.hazard-stripe--amber {
  background: repeating-linear-gradient(-45deg, #111 0 14px, var(--amber) 14px 28px);
}

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius);
  font-size: 15px; font-weight: 700; letter-spacing: 1px;
  border: 2px solid transparent; cursor: pointer;
  transition: all .2s ease; white-space: nowrap;
}
.btn--primary { background: var(--accent); color: #fff !important; }
.btn--primary:hover { background: var(--accent-dark); transform: translateY(-1px); }
.btn--outline { border-color: #fff; color: #fff !important; background: transparent; }
.btn--outline:hover { background: #fff; color: var(--primary) !important; }
.btn--blue { background: var(--primary); color: #fff !important; }
.btn--blue:hover { background: var(--primary-light); }
.btn--ghost { border-color: var(--primary); color: var(--primary) !important; background: transparent; }
.btn--ghost:hover { background: var(--primary); color: #fff !important; }
.btn--sm { padding: 8px 18px; font-size: 14px; }

/* 标签 */
.tag {
  display: inline-block; padding: 3px 12px; border-radius: 3px;
  font-size: 12px; font-weight: 600; letter-spacing: 1px;
  background: var(--sky); color: var(--primary); border: 1px solid #C9DDF0;
}
.tag--red { background: #FBEBEC; color: var(--accent); border-color: #F3C3C9; }
.tag--amber { background: #FEF6E7; color: #A87000; border-color: #F3DFB0; }

/* ============ 顶部警示条 ============ */
.topbar { background: var(--primary-deep); color: rgba(255,255,255,.85); font-size: 13px; }
.topbar .container { display: flex; align-items: center; justify-content: space-between; height: 36px; }
.topbar a { color: rgba(255,255,255,.85); }
.topbar a:hover { color: var(--amber); }
.topbar .topbar-tip { display: flex; align-items: center; gap: 8px; }
.topbar .topbar-tip::before {
  content: "⚠"; color: var(--amber); font-weight: 700; font-size: 14px;
}
.topbar .topbar-links { display: flex; gap: 22px; }

/* ============ 导航栏 ============ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: #fff; border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 8px rgba(10,53,88,.06);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo {
  width: 46px; height: 46px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 8px; color: #fff; font-weight: 900; font-size: 22px;
  box-shadow: 0 3px 8px rgba(15,76,129,.3);
}
.brand-name { line-height: 1.2; }
.brand-name strong { display: block; font-size: 19px; color: var(--primary-dark); letter-spacing: 2px; }
.brand-name span { font-size: 12px; color: var(--gray); letter-spacing: 1px; }
.nav-menu { display: flex; align-items: center; gap: 6px; }
.nav-menu a {
  display: block; padding: 26px 16px; font-size: 15px; font-weight: 600;
  color: var(--ink); border-bottom: 3px solid transparent;
}
.nav-menu a:hover { color: var(--accent); }
.nav-menu a.active { color: var(--accent); border-bottom-color: var(--accent); }
.nav-cta { margin-left: 14px; }
.nav-toggle {
  display: none; width: 42px; height: 42px; border: 1px solid var(--line);
  border-radius: 6px; background: #fff; cursor: pointer; position: relative;
}
.nav-toggle span {
  position: absolute; left: 10px; right: 10px; height: 2px; background: var(--primary);
  transition: all .25s ease;
}
.nav-toggle span:nth-child(1) { top: 12px; }
.nav-toggle span:nth-child(2) { top: 20px; }
.nav-toggle span:nth-child(3) { top: 28px; }
.nav-toggle.open span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

/* ============ 首页 Banner ============ */
.hero {
  position: relative; color: #fff; overflow: hidden;
  background:
    linear-gradient(120deg, rgba(8,43,71,.98) 0%, rgba(15,76,129,.94) 55%, rgba(30,107,184,.88) 100%);
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 44px 44px;
}
.hero::after {
  content: ""; position: absolute; right: -140px; top: -140px;
  width: 480px; height: 480px; border-radius: 50%;
  border: 60px solid rgba(255,255,255,.05);
}
.hero .container { position: relative; z-index: 2; padding: 88px 24px 96px; text-align: center; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; letter-spacing: 3px; color: var(--amber);
  padding: 6px 16px; border: 1px solid rgba(245,166,35,.5); border-radius: 999px;
  margin: 0 auto 26px; background: rgba(245,166,35,.08);
}
.hero h1 { font-size: 46px; color: #fff; letter-spacing: 2px; margin: 0 auto 18px; max-width: 880px; }
.hero h1 em { font-style: normal; color: var(--amber); }
.hero-sub { font-size: 18px; color: rgba(255,255,255,.88); margin: 0 auto 30px; letter-spacing: 1px; max-width: 720px; }
.hero-sub b { color: #fff; font-weight: 700; }
.hero-principles {
  display: flex; flex-wrap: wrap; gap: 12px; margin: 0 auto 38px;
  justify-content: center;
}
.hero-principles li {
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; color: #fff;
  padding: 9px 18px; border-radius: 4px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.22);
}
.hero-principles li i {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent); flex-shrink: 0;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  margin-top: 64px; background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.12);
}
.hero-stat { background: rgba(8,43,71,.55); padding: 22px 18px; text-align: center; }
.hero-stat b { display: block; font-size: 30px; color: var(--amber); letter-spacing: 1px; }
.hero-stat span { font-size: 13px; color: rgba(255,255,255,.8); }

/* ============ 理念标语带（首页） ============ */
.principle-band { background: var(--bg-light); border-bottom: 1px solid var(--line); }
.principle-band .container { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 36px 24px; }
.principle-item { display: flex; gap: 14px; align-items: flex-start; }
.principle-item .num {
  width: 42px; height: 42px; flex-shrink: 0; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 900; color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
}
.principle-item h3 { font-size: 16px; margin-bottom: 4px; }
.principle-item p { font-size: 13px; color: var(--gray); line-height: 1.6; }

/* ============ 卡片 ============ */
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow);
  transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--primary-light); }
.card .card-icon {
  width: 52px; height: 52px; border-radius: 8px; margin-bottom: 16px;
  display: flex; align-items: center; justify-content: center;
  background: var(--sky); color: var(--primary); font-size: 24px;
}
.card h3 { font-size: 17px; margin-bottom: 8px; }
.card p { font-size: 14px; color: var(--gray); line-height: 1.7; }
.card .card-more { margin-top: 14px; font-size: 13px; font-weight: 700; color: var(--primary); }
.card:hover .card-more { color: var(--accent); }
.card .card-icon i { font-style: normal; }

/* 服务板块卡片（services 页） */
.svc-board { margin-bottom: 64px; }
.svc-board-head {
  display: flex; align-items: center; gap: 18px; padding-bottom: 18px;
  border-bottom: 2px solid var(--primary); margin-bottom: 26px;
}
.svc-board-head .idx {
  width: 52px; height: 52px; flex-shrink: 0; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary); color: #fff; font-size: 24px; font-weight: 900;
}
.svc-board-head h2 { font-size: 22px; }
.svc-board-head p { font-size: 14px; color: var(--gray); margin-top: 2px; }
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.svc-card { display: flex; flex-direction: column; }
.svc-card .card-icon { background: var(--bg-light); }
.svc-card:hover .card-icon { background: var(--sky); }
.svc-card .card-more { margin-top: auto; padding-top: 14px; }

/* 案例卡片 */
.case-card { overflow: hidden; padding: 0; display: flex; flex-direction: column; }
.case-thumb { height: 170px; display: flex; align-items: center; justify-content: center; font-size: 42px; }
.case-thumb--blue { background: linear-gradient(135deg, #0F4C81, #1E6BB8); }
.case-thumb--red { background: linear-gradient(135deg, #9E0C24, #C8102E); }
.case-thumb--green { background: linear-gradient(135deg, #14624B, #1E8C6D); }
.case-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.case-body .case-meta { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.case-body h3 { font-size: 17px; margin-bottom: 8px; }
.case-body p { font-size: 14px; color: var(--gray); }
.case-body .case-foot { margin-top: auto; padding-top: 16px; font-size: 13px; color: var(--gray-light); }

/* 资讯卡片 */
.news-card { display: flex; flex-direction: column; padding: 22px 24px; }
.news-card .news-cat { margin-bottom: 10px; }
.news-card h3 { font-size: 16px; margin-bottom: 8px; line-height: 1.5; }
.news-card h3 a { color: var(--primary-dark); }
.news-card h3 a:hover { color: var(--accent); }
.news-card p { font-size: 13px; color: var(--gray); flex: 1; }
.news-card .news-date { margin-top: 16px; padding-top: 12px; border-top: 1px dashed var(--line); font-size: 13px; color: var(--gray-light); }

/* 首页资讯列表（紧凑版） */
.news-list-item {
  display: flex; align-items: baseline; gap: 16px; padding: 15px 0;
  border-bottom: 1px dashed var(--line);
}
.news-list-item:last-child { border-bottom: none; }
.news-list-item .date { flex-shrink: 0; color: var(--gray-light); font-size: 13px; font-family: Consolas, monospace; }
.news-list-item .cat { flex-shrink: 0; }
.news-list-item a.t { flex: 1; color: var(--ink); font-weight: 600; font-size: 15px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.news-list-item a.t:hover { color: var(--accent); }

/* ============ 优势（首页四大核心优势） ============ */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.adv-item { text-align: left; }
.adv-item .adv-no {
  font-size: 40px; font-weight: 900; color: #E3EAF2; line-height: 1;
  margin-bottom: 10px; font-family: Georgia, serif;
}
.adv-item:hover .adv-no { color: var(--primary-light); }
.adv-item h3 { font-size: 16px; margin-bottom: 8px; position: relative; padding-left: 14px; }
.adv-item h3::before { content: ""; position: absolute; left: 0; top: 7px; width: 5px; height: 16px; background: var(--accent); }
.adv-item p { font-size: 13.5px; color: var(--gray); }

/* ============ 业务预览（首页三板块） ============ */
.biz-preview {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  margin-top: 14px;
}
.biz {
  position: relative; border-radius: 12px; overflow: hidden;
  min-height: 420px; color: #fff;
  display: flex; flex-direction: column;
  box-shadow: 0 4px 20px rgba(8,43,71,.12);
  transition: transform .25s ease, box-shadow .25s ease;
}
.biz:hover { transform: translateY(-6px); box-shadow: 0 18px 50px rgba(8,43,71,.28); }
.biz-bg { position: absolute; inset: 0; z-index: 0; }
.biz--digital .biz-bg { background: linear-gradient(155deg, #082B47 0%, #0F4C81 50%, #1E6BB8 100%); }
.biz--consult .biz-bg { background: linear-gradient(155deg, #0A3558 0%, #14619A 50%, #1E8AC8 100%); }
.biz--tech .biz-bg { background: linear-gradient(155deg, #5A0B1E 0%, #9E0C24 50%, #E63A5A 100%); }
.biz::before {
  content: ""; position: absolute;
  top: -70px; right: -70px;
  width: 220px; height: 220px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
  z-index: 0;
}
.biz::after {
  content: ""; position: absolute;
  bottom: -50px; left: -50px;
  width: 180px; height: 180px;
  border-radius: 50%;
  background: rgba(255,255,255,.04);
  z-index: 0;
}
.biz-no {
  position: absolute; top: 26px; right: 30px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 56px; font-weight: 900; font-style: italic; line-height: 1;
  color: rgba(255,255,255,.18); z-index: 0; pointer-events: none;
}
.biz-inner {
  position: relative; z-index: 1;
  padding: 32px 30px 26px;
  display: flex; flex-direction: column;
  flex: 1;
}
.biz-icon {
  width: 58px; height: 58px; border-radius: 12px;
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.28);
  display: flex; align-items: center; justify-content: center;
  font-size: 30px; margin-bottom: 18px;
}
.biz h3 {
  color: #fff; font-size: 21px;
  margin-bottom: 10px; letter-spacing: 1.5px;
}
.biz p {
  font-size: 13.5px; color: rgba(255,255,255,.86);
  line-height: 1.8; margin-bottom: 18px;
}
.biz-tags {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-bottom: 22px;
}
.biz-tags span {
  font-size: 12.5px; padding: 5px 12px; border-radius: 999px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.24);
  color: #fff; letter-spacing: .5px;
}
.biz-foot {
  margin-top: auto; padding-top: 16px;
  border-top: 1px dashed rgba(255,255,255,.24);
  display: flex; align-items: center; justify-content: space-between;
}
.biz-stats { font-size: 12.5px; color: rgba(255,255,255,.78); letter-spacing: 1px; }
.biz-stats b { color: var(--amber); font-size: 20px; font-weight: 800; margin-right: 4px; }
.biz-link {
  font-size: 14px; font-weight: 700; color: #fff;
  display: inline-flex; align-items: center; gap: 6px;
  border-bottom: 2px solid var(--amber); padding-bottom: 2px;
  transition: color .2s ease;
}
.biz-link:hover { color: var(--amber); }

/* ============ CTA 区块 ============ */
.cta {
  position: relative; overflow: hidden; color: #fff;
  background: linear-gradient(120deg, var(--primary-deep), var(--primary));
}
.cta .container { position: relative; z-index: 2; padding: 64px 24px; text-align: center; }
.cta h2 { color: #fff; font-size: 28px; letter-spacing: 1px; margin-bottom: 12px; }
.cta p { color: rgba(255,255,255,.8); margin-bottom: 28px; }
.cta .cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ============ 关于我们 ============ */
.page-hero { position: relative; color: #fff; background: linear-gradient(120deg, var(--primary-deep), var(--primary)); overflow: hidden; }
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 40px 40px;
}
.page-hero .container { position: relative; z-index: 2; padding: 58px 24px 64px; }
.page-hero .crumb { font-size: 13px; color: rgba(255,255,255,.65); margin-bottom: 14px; }
.page-hero .crumb a { color: rgba(255,255,255,.65); }
.page-hero .crumb a:hover { color: var(--amber); }
.page-hero h1 { color: #fff; font-size: 34px; letter-spacing: 2px; margin-bottom: 10px; }
.page-hero p { color: rgba(255,255,255,.82); max-width: 760px; }

/* 关于页 */
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.about-visual {
  border-radius: 8px; overflow: hidden; position: relative;
  background: linear-gradient(135deg, #0F4C81, #1E6BB8);
  padding: 40px; color: #fff; min-height: 320px;
  display: flex; flex-direction: column; justify-content: flex-end;
}
.about-visual::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 34px 34px;
}
.about-visual .inner { position: relative; z-index: 1; }
.about-visual h3 { color: #fff; font-size: 24px; letter-spacing: 2px; margin-bottom: 8px; }
.about-visual p { color: rgba(255,255,255,.85); font-size: 14px; }
.about-text h2 { font-size: 24px; margin-bottom: 16px; }
.about-text p { color: var(--gray); margin-bottom: 14px; }
.about-text strong { color: var(--primary); }

/* 价值理念条（关于页） */
.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.value-card { border-top: 4px solid var(--primary); }
.value-card:nth-child(2) { border-top-color: var(--accent); }
.value-card:nth-child(3) { border-top-color: var(--amber); }
.value-card:nth-child(4) { border-top-color: var(--primary-light); }
.value-card h3 { font-size: 16px; margin-bottom: 8px; }
.value-card p { font-size: 13.5px; color: var(--gray); }

/* 团队优势 */
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.team-item { text-align: center; padding: 30px 20px; }
.team-item .t-icon {
  width: 64px; height: 64px; margin: 0 auto 16px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 28px;
  background: var(--sky); color: var(--primary);
}
.team-item h3 { font-size: 16px; margin-bottom: 8px; }
.team-item p { font-size: 13.5px; color: var(--gray); }

/* 服务领域 */
.industry-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.industry-item {
  text-align: center; padding: 26px 12px; border: 1px solid var(--line);
  border-radius: var(--radius); background: #fff;
  transition: all .25s ease;
}
.industry-item:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.industry-item .i-icon { font-size: 34px; margin-bottom: 12px; }
.industry-item h4 { font-size: 15px; }

/* ============ 理念专栏（ideas） ============ */
.idea-block { display: grid; grid-template-columns: 1fr 1.4fr; gap: 36px; align-items: start; padding: 36px 0; border-bottom: 1px solid var(--line); }
.idea-block:last-child { border-bottom: none; }
.idea-block:first-child { padding-top: 0; }
.idea-side { position: sticky; top: 100px; }
.idea-side .badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: 2px; color: #fff;
  background: var(--primary); padding: 6px 16px; border-radius: 999px; margin-bottom: 16px;
}
.idea-side .badge--red { background: var(--accent); }
.idea-side .badge--amber { background: #B07900; }
.idea-side h2 { font-size: 26px; margin-bottom: 10px; }
.idea-side .en { color: var(--gray-light); font-size: 13px; letter-spacing: 3px; text-transform: uppercase; }
.idea-body h3 { font-size: 17px; margin: 20px 0 8px; padding-left: 12px; border-left: 4px solid var(--accent); }
.idea-body h3:first-child { margin-top: 0; }
.idea-body p { color: var(--gray); margin-bottom: 10px; }
.idea-body ul { margin-bottom: 12px; }
.idea-body ul li { position: relative; padding-left: 20px; margin-bottom: 6px; color: var(--gray); }
.idea-body ul li::before { content: "▸"; position: absolute; left: 2px; color: var(--primary); font-weight: 700; }
.idea-quote {
  background: var(--bg-light); border-left: 4px solid var(--accent);
  padding: 16px 20px; margin: 16px 0; font-size: 14.5px; color: var(--ink);
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* ============ 表单 ============ */
.form-card { background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow-lg); padding: 34px; }
.form-card h3 { font-size: 19px; margin-bottom: 6px; }
.form-card .form-tip { font-size: 13px; color: var(--gray); margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; color: var(--primary-dark); margin-bottom: 7px; }
.form-group label .req { color: var(--accent); }
.form-control {
  width: 100%; padding: 11px 14px; font-size: 14.5px; font-family: inherit;
  border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink);
  background: var(--bg-light); transition: border-color .2s ease, box-shadow .2s ease;
}
.form-control:focus { outline: none; border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(15,76,129,.12); }
textarea.form-control { resize: vertical; min-height: 110px; }
.form-note { font-size: 12.5px; color: var(--gray-light); margin-top: 10px; }
.form-success {
  display: none; text-align: center; padding: 40px 20px;
}
.form-success.show { display: block; }
.form-success .ok-icon {
  width: 64px; height: 64px; margin: 0 auto 18px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: #E8F5EE; color: #1E8C6D; font-size: 30px;
}
.form-success h4 { font-size: 20px; margin-bottom: 8px; }
.form-success p { color: var(--gray); }

/* 联系方式卡 */
.contact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 40px; }
.contact-card { text-align: center; padding: 28px 20px; }
.contact-card .c-icon {
  width: 56px; height: 56px; margin: 0 auto 14px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 24px;
  background: var(--sky); color: var(--primary);
}
.contact-card h3 { font-size: 16px; margin-bottom: 6px; }
.contact-card p { font-size: 14px; color: var(--gray); }
.contact-card p.tel { font-size: 19px; font-weight: 800; color: var(--primary); letter-spacing: 1px; }

/* 二维码占位 */
.qr-box { text-align: center; padding: 22px; border: 1px dashed var(--line); border-radius: 8px; background: var(--bg-light); }
.qr-box .qr {
  width: 150px; height: 150px; margin: 0 auto 12px; border-radius: 6px;
  background: #fff; border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; color: var(--gray-light);
}
.qr-box img.qr {
  display: block; width: 100%; height: 100%;
  object-fit: contain; padding: 6px; box-sizing: border-box;
}
.qr-box p { font-size: 13px; color: var(--gray); }

/* ============ 页脚 ============ */
.site-footer { background: var(--primary-deep); color: rgba(255,255,255,.75); }
.footer-main { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding: 56px 0 40px; }
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand .brand-logo { background: rgba(255,255,255,.12); box-shadow: none; }
.footer-brand .brand-name strong { color: #fff; }
.footer-brand .brand-name span { color: rgba(255,255,255,.6); }
.footer-brand p { font-size: 13.5px; color: rgba(255,255,255,.65); line-height: 1.9; margin-bottom: 16px; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 18px; position: relative; padding-bottom: 10px; }
.footer-col h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 32px; height: 3px; background: var(--amber); }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { color: rgba(255,255,255,.7); font-size: 14px; }
.footer-col ul a:hover { color: var(--amber); }
.footer-col .f-tip {
  font-size: 12.5px; color: rgba(255,255,255,.55); line-height: 1.8;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1);
  padding: 12px 14px; border-radius: 6px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12); padding: 18px 0;
  font-size: 13px; color: rgba(255,255,255,.55);
}
.footer-bottom .container { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.footer-bottom a { color: rgba(255,255,255,.6); }
.footer-bottom a:hover { color: var(--amber); }

/* ============ 悬浮咨询按钮 ============ */
.fab {
  position: fixed; right: 22px; bottom: 22px; z-index: 90;
  display: flex; align-items: center; gap: 8px;
  background: var(--accent); color: #fff; font-size: 14px; font-weight: 700;
  padding: 13px 20px; border-radius: 999px; box-shadow: 0 6px 18px rgba(200,16,46,.4);
  transition: transform .2s ease;
}
.fab:hover { background: var(--accent-dark); color: #fff; transform: translateY(-3px); }

/* ============ 回到顶部 ============ */
.back-top {
  position: fixed; right: 22px; bottom: 84px; z-index: 90;
  width: 42px; height: 42px; border-radius: 8px;
  display: none; align-items: center; justify-content: center;
  background: var(--primary); color: #fff; font-size: 18px;
  box-shadow: var(--shadow-lg); cursor: pointer; border: none;
}
.back-top.show { display: flex; }
.back-top:hover { background: var(--primary-light); }

/* ============ 详情页 ============ */
.detail-hero {
  background: linear-gradient(120deg, var(--primary-deep), var(--primary));
  color: #fff; padding: 44px 0;
}
.detail-hero .crumb { font-size: 13px; color: rgba(255,255,255,.65); margin-bottom: 12px; }
.detail-hero .crumb a { color: rgba(255,255,255,.65); }
.detail-hero .crumb a:hover { color: var(--amber); }
.detail-hero h1 { color: #fff; font-size: 28px; letter-spacing: 1px; margin-bottom: 8px; }
.detail-hero p { color: rgba(255,255,255,.8); font-size: 14.5px; }

.detail-layout { display: grid; grid-template-columns: 1fr 320px; gap: 36px; padding: 48px 0 72px; }
.detail-main .block {
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: 28px; margin-bottom: 22px; box-shadow: var(--shadow);
}
.detail-main .block h2 {
  font-size: 18px; margin-bottom: 14px; display: flex; align-items: center; gap: 10px;
}
.detail-main .block h2::before { content: ""; width: 6px; height: 20px; background: var(--accent); border-radius: 2px; }
.detail-main .block p { color: var(--gray); margin-bottom: 10px; font-size: 14.5px; }
.detail-main .block ul li {
  position: relative; padding-left: 22px; margin-bottom: 9px; color: var(--gray); font-size: 14.5px;
}
.detail-main .block ul li::before {
  content: "✔"; position: absolute; left: 0; top: 0; color: var(--primary); font-weight: 700; font-size: 13px;
}
.detail-main .block .kpi-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.detail-main .block .kpi {
  border: 1px solid var(--line); border-radius: 6px; padding: 16px;
  background: var(--bg-light); text-align: center;
}
.detail-main .block .kpi b { display: block; font-size: 22px; color: var(--primary); }
.detail-main .block .kpi span { font-size: 12.5px; color: var(--gray); }
.detail-side .side-card {
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: 24px; margin-bottom: 22px; box-shadow: var(--shadow);
}
.detail-side .side-card h3 {
  font-size: 16px; margin-bottom: 14px; padding-bottom: 10px;
  border-bottom: 2px solid var(--primary);
}
.detail-side .side-card ul li { margin-bottom: 10px; }
.detail-side .side-card ul a {
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
  font-size: 14px; color: var(--gray); padding: 7px 10px; border-radius: 4px;
  transition: all .2s ease;
}
.detail-side .side-card ul a:hover { background: var(--sky); color: var(--primary); }
.detail-side .side-card ul a .arr { color: var(--gray-light); }
.detail-side .cta-mini {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff; text-align: center;
}
.detail-side .cta-mini h3 { color: #fff; border-bottom-color: rgba(255,255,255,.25); }
.detail-side .cta-mini p { font-size: 13.5px; color: rgba(255,255,255,.85); margin-bottom: 18px; }

/* ============ 分页/更多 ============ */
.pagination { display: flex; justify-content: center; gap: 10px; margin-top: 40px; }
.pagination a, .pagination span {
  min-width: 38px; height: 38px; padding: 0 12px; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--line); border-radius: 6px; font-size: 14px; color: var(--gray);
  background: #fff;
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination .cur { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ============ 其他 ============ */
.breadcrumb-bar { background: var(--bg-light); border-bottom: 1px solid var(--line); padding: 12px 0; font-size: 13px; color: var(--gray); }
.breadcrumb-bar a { color: var(--gray); }
.breadcrumb-bar a:hover { color: var(--accent); }
.breadcrumb-bar .sep { margin: 0 8px; color: var(--gray-light); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

/* 案例筛选（cases） */
.filter-bar { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 30px; }
.filter-btn {
  padding: 8px 22px; border: 1px solid var(--line); border-radius: 999px;
  background: #fff; font-size: 14px; font-weight: 600; color: var(--gray); cursor: pointer;
  transition: all .2s ease;
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* 弹窗 */
.modal-mask {
  position: fixed; inset: 0; z-index: 200; background: rgba(8,43,71,.55);
  display: none; align-items: flex-start; justify-content: center; padding: 60px 20px 40px; overflow-y: auto;
}
.modal-mask.show { display: flex; }
.modal-box {
  background: #fff; border-radius: 10px; max-width: 760px; width: 100%;
  box-shadow: var(--shadow-lg); overflow: hidden; position: relative;
  animation: modalIn .25s ease;
}
@keyframes modalIn { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
.modal-head {
  background: linear-gradient(120deg, var(--primary-deep), var(--primary));
  color: #fff; padding: 24px 28px;
}
.modal-head .m-cat { font-size: 12.5px; color: var(--amber); letter-spacing: 1px; margin-bottom: 6px; }
.modal-head h3 { color: #fff; font-size: 20px; }
.modal-close {
  position: absolute; top: 14px; right: 16px; width: 34px; height: 34px; border: none;
  background: rgba(255,255,255,.15); color: #fff; font-size: 20px; border-radius: 50%;
  cursor: pointer; line-height: 1;
}
.modal-close:hover { background: var(--accent); }
.modal-body { padding: 26px 28px 30px; }
.modal-body h4 { font-size: 15px; margin: 16px 0 8px; color: var(--primary-dark); display: flex; align-items: center; gap: 8px; }
.modal-body h4::before { content: ""; width: 5px; height: 14px; background: var(--accent); border-radius: 2px; }
.modal-body p { font-size: 14px; color: var(--gray); margin-bottom: 8px; }
.modal-body ul li { position: relative; padding-left: 20px; font-size: 14px; color: var(--gray); margin-bottom: 6px; }
.modal-body ul li::before { content: "▸"; position: absolute; left: 2px; color: var(--primary); }

/* ============ 动画（克制：仅保留过渡，不使用入场动画） ============ */
/* 设计原则：拒绝花哨入场动画，元素默认完全可见，仅保留 hover/状态过渡 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .svc-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .industry-list { grid-template-columns: repeat(3, 1fr); }
  .detail-layout { grid-template-columns: 1fr; }
  .detail-side { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 38px; }
}

@media (max-width: 768px) {
  .section { padding: 52px 0; }
  .section-title { font-size: 24px; }
  .hero .container { padding: 56px 20px 64px; }
  .hero h1 { font-size: 29px; }
  .hero-sub { font-size: 15.5px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .principle-band .container { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .biz-preview { grid-template-columns: 1fr; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-cards { grid-template-columns: 1fr; }
  .idea-block { grid-template-columns: 1fr; gap: 22px; }
  .idea-side { position: static; }
  .form-row { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 28px; }
  .industry-list { grid-template-columns: repeat(2, 1fr); }
  .detail-main .block .kpi-list { grid-template-columns: repeat(2, 1fr); }

  /* 导航 */
  .nav-toggle { display: block; }
  .nav-menu {
    position: absolute; top: 76px; left: 0; right: 0; z-index: 99;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-lg);
    display: none; max-height: calc(100vh - 76px); overflow-y: auto;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 15px 24px; border-bottom: 1px solid var(--line); border-left: 3px solid transparent; }
  .nav-menu a.active { border-left-color: var(--accent); border-bottom-color: var(--line); }
  .nav-cta { margin: 14px 24px 20px; }
  .nav-cta .btn { width: 100%; }
  .topbar .topbar-links { display: none; }
  .topbar .container { justify-content: center; }
}

@media (max-width: 480px) {
  .principle-band .container { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .svc-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .industry-list { grid-template-columns: 1fr 1fr; }
  .footer-main { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
  .hero-stat b { font-size: 24px; }
  .detail-main .block .kpi-list { grid-template-columns: 1fr; }
  .detail-side { grid-template-columns: 1fr; }
}