/* ============================================================
   设计令牌（取自 SGS 官网配色体系）
   主色橙 #ca4300 / 板岩蓝 #3c515b / 钢蓝 #49738b / 浅底 #f6f9fc
   ============================================================ */
:root {
  --orange: #ca4300;
  --orange-dark: #b03500;
  --orange-deep: #8e2600;
  --slate: #3c515b;
  --steel: #49738b;
  --steel-light: #799eaf;
  --pale: #d8e1e6;
  --bg-light: #f6f9fc;
  --ink: #252525;
  --grey-700: #555;
  --grey-600: #666;
  --grey-500: #999;
  --grey-300: #dcdcdc;
  --grey-200: #f2f2f2;
  --white: #fff;
  --radius-btn: 2px;
  --font: "Suisse Intl", "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --shadow-card: 0 2px 12px rgba(37, 37, 37, .06);
  --shadow-lift: 0 14px 34px rgba(37, 37, 37, .14);
  --header-h: 72px;
  --utility-h: 38px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ============ 按钮（SGS 风格：小圆角、克制） ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 28px;
  font-size: 15px; font-weight: 500; letter-spacing: .02em;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .25s ease, color .25s ease, border-color .25s ease, transform .25s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--orange); color: var(--white); }
.btn-primary:hover { background: var(--orange-dark); }
.btn-outline-white { background: transparent; color: var(--white); border-color: rgba(255, 255, 255, .85); }
.btn-outline-white:hover { background: var(--white); color: var(--ink); }
.btn-white { background: var(--white); color: var(--orange); }
.btn-white:hover { background: var(--grey-200); }
.btn-dark { background: var(--ink); color: var(--white); }
.btn-dark:hover { background: var(--slate); }
.btn-lg { padding: 15px 36px; font-size: 16px; }
.btn-nav { padding: 9px 22px; font-size: 14px; }

/* ============ 顶部工具条 ============ */
.utility-bar {
  background: var(--slate);
  color: rgba(255, 255, 255, .88);
  font-size: 13px;
  height: var(--utility-h);
}
.utility-inner { display: flex; justify-content: space-between; align-items: center; height: var(--utility-h); }
.utility-links, .utility-right { display: flex; align-items: center; gap: 14px; }
.utility-bar a { opacity: .88; transition: opacity .2s; }
.utility-bar a:hover { opacity: 1; text-decoration: underline; }
.divider { width: 1px; height: 12px; background: rgba(255, 255, 255, .3); }
.lang-switch { background: none; border: 0; color: inherit; font: inherit; cursor: pointer; opacity: .88; }
.lang-switch:hover { opacity: 1; }
.caret { font-size: 10px; }

/* ============ 主导航 ============ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--white);
  height: var(--header-h);
  transition: box-shadow .3s ease;
}
.site-header.is-scrolled { box-shadow: 0 2px 16px rgba(37, 37, 37, .1); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 24px; }

.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark {
  width: 42px; height: 42px;
  background: var(--orange);
  color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 12px; letter-spacing: .04em; line-height: 1;
  border-radius: var(--radius-btn);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 17px; font-weight: 600; letter-spacing: .02em; }
.brand-text strong.brand-branch { font-size: 15px; font-weight: 500; }
.brand-text small { font-size: 9.5px; color: var(--grey-500); letter-spacing: .08em; margin-top: 4px; }
.brand-mark-img { height: 42px; width: auto; display: block; }

.main-nav { display: flex; gap: 34px; }
.main-nav a {
  font-size: 15.5px; font-weight: 500; color: var(--ink);
  padding: 6px 0; position: relative;
}
.main-nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px; background: var(--orange);
  transition: width .28s ease;
}
.main-nav a:hover { color: var(--orange); }
.main-nav a:hover::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 16px; }
.search-btn {
  background: none; border: 0; cursor: pointer; color: var(--ink);
  width: 38px; height: 38px; display: flex; align-items: center; justify-content: center;
  border-radius: 50%; transition: background .2s;
}
.search-btn:hover { background: var(--grey-200); }

.menu-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: 8px;
}
.menu-toggle span { width: 22px; height: 2px; background: var(--ink); transition: transform .3s, opacity .3s; }
.menu-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.is-open span:nth-child(2) { opacity: 0; }
.menu-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ 首屏 Hero（视频背景） ============ */
.hero {
  position: relative;
  min-height: 640px;
  min-height: max(640px, calc(100vh - var(--header-h) - var(--utility-h)));
  display: flex; align-items: center;
  overflow: hidden;
  /* 视频加载前 / 失败时的兜底背景：深板岩蓝渐变 */
  background: linear-gradient(135deg, #22333b 0%, var(--slate) 45%, #2c3f47 100%);
}
.hero-video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: 0;
}
.hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(180deg, rgba(37, 37, 37, .42) 0%, rgba(44, 63, 71, .55) 60%, rgba(37, 37, 37, .72) 100%),
    linear-gradient(90deg, rgba(37, 37, 37, .45) 0%, rgba(37, 37, 37, 0) 60%);
}
.hero-content { position: relative; z-index: 2; color: var(--white); padding-top: 40px; padding-bottom: 90px; }

.hero-eyebrow {
  font-size: 14px; letter-spacing: .22em; font-weight: 500;
  color: rgba(255, 255, 255, .82);
  margin-bottom: 22px;
  display: flex; align-items: center; gap: 14px;
}
.hero-eyebrow::before { content: ""; width: 42px; height: 2px; background: var(--orange); }

.hero-title {
  font-size: clamp(42px, 6vw, 76px);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: .01em;
  margin-bottom: 26px;
}
.rotator {
  position: relative; display: inline-block;
  min-width: 7.6em; height: 1.16em;
  vertical-align: bottom; overflow: hidden;
}
.rotator-word {
  position: absolute; left: 0; top: 0;
  font-weight: 400; color: #ff8a50;
  opacity: 0; transform: translateY(60%);
  transition: opacity .55s ease, transform .55s ease;
  white-space: nowrap;
}
.rotator-word.is-active { opacity: 1; transform: translateY(0); }
.rotator-word.is-leaving { opacity: 0; transform: translateY(-60%); }

.hero-sub {
  font-size: clamp(16px, 1.6vw, 19px);
  color: rgba(255, 255, 255, .85);
  font-weight: 300;
  margin-bottom: 40px;
}
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-scroll {
  position: absolute; z-index: 2;
  left: 50%; bottom: 28px; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: rgba(255, 255, 255, .75); font-size: 12px; letter-spacing: .18em;
}
.hero-scroll-line { width: 1px; height: 44px; background: rgba(255, 255, 255, .5); position: relative; overflow: hidden; }
.hero-scroll-line::after {
  content: ""; position: absolute; left: 0; top: -50%;
  width: 100%; height: 50%; background: var(--white);
  animation: scrollHint 1.8s ease-in-out infinite;
}
@keyframes scrollHint { 0% { top: -50%; } 100% { top: 110%; } }

/* ============ 数据一览 ============ */
.stats { background: var(--white); border-bottom: 1px solid var(--grey-200); }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  padding: 46px 24px;
}
.stat-item {
  text-align: center;
  padding: 10px 20px;
  border-left: 1px solid var(--grey-200);
}
.stat-item:first-child { border-left: 0; }
.stat-num {
  display: block;
  font-size: clamp(34px, 3.6vw, 48px);
  font-weight: 300; color: var(--orange);
  line-height: 1.1; margin-bottom: 6px;
  font-variant-numeric: tabular-nums;
}
.stat-label { font-size: 14px; color: var(--grey-600); }

/* ============ 通用 Section ============ */
.section { padding: 96px 0; }
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head-row { max-width: none; display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; }
.section-eyebrow {
  font-size: 13px; letter-spacing: .2em; font-weight: 600;
  color: var(--steel); margin-bottom: 12px;
}
.eyebrow-light { color: var(--steel-light); }
.section-title { font-size: clamp(30px, 3.4vw, 42px); font-weight: 400; line-height: 1.25; }
.title-light { color: var(--white); }
.section-desc { margin-top: 16px; color: var(--grey-600); font-size: 16.5px; }
.view-all { color: var(--orange); font-weight: 500; white-space: nowrap; }
.view-all i { font-style: normal; transition: margin-left .25s; display: inline-block; }
.view-all:hover i { margin-left: 6px; }

/* ============ 服务卡片 ============ */
.services { background: var(--bg-light); }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card {
  background: var(--white);
  padding: 38px 32px 32px;
  position: relative;
  display: flex; flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: transform .3s ease, box-shadow .3s ease;
}
.service-card::before {
  content: ""; position: absolute; top: 0; left: 0;
  width: 100%; height: 3px; background: var(--orange);
  transform: scaleX(0); transform-origin: left;
  transition: transform .35s ease;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lift); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 56px; height: 56px;
  color: var(--slate);
  margin-bottom: 22px;
  transition: color .3s;
}
.service-icon svg { width: 100%; height: 100%; }
.service-card:hover .service-icon { color: var(--orange); }
.service-card h3 { font-size: 21px; font-weight: 500; margin-bottom: 12px; }
.service-card h3 small {
  display: block; font-size: 12.5px; font-weight: 500;
  color: var(--grey-500); letter-spacing: .14em; margin-top: 3px;
}
.service-card p { font-size: 14.5px; color: var(--grey-600); flex: 1; }
.service-more {
  margin-top: 22px; font-size: 14px; font-weight: 500; color: var(--orange);
}
.service-more i { font-style: normal; display: inline-block; transition: margin-left .25s; }
.service-card:hover .service-more i { margin-left: 6px; }

/* ============ 项目类型网格 ============ */
.industry-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.industry-tile {
  position: relative;
  min-height: 200px;
  padding: 22px 20px;
  color: var(--white);
  display: flex; flex-direction: column; justify-content: flex-end;
  overflow: hidden;
  isolation: isolate;
}
.industry-tile::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  transition: transform .5s ease, opacity .5s ease;
  opacity: .92;
}
.industry-tile:hover::before { transform: scale(1.06); opacity: 1; }
.tile-bg-icon { display: none; }
.tile-1::before {
  background: linear-gradient(180deg, rgba(37,37,37,.25), rgba(37,37,37,.78)),
              url('https://images.pexels.com/photos/13963757/pexels-photo-13963757.jpeg?cs=tinysrgb&dpr=1&w=800') center/cover no-repeat;
  background-color: var(--slate);
}
.tile-2::before {
  background: linear-gradient(180deg, rgba(37,37,37,.25), rgba(37,37,37,.78)),
              url('https://images.pexels.com/photos/16659262/pexels-photo-16659262/free-photo-of-aerial-view-of-a-solar-farm.jpeg?cs=tinysrgb&dpr=1&w=800') center/cover no-repeat;
  background-color: var(--slate);
}
.tile-3::before {
  background: linear-gradient(180deg, rgba(37,37,37,.25), rgba(37,37,37,.78)),
              url('https://images.pexels.com/photos/33628380/pexels-photo-33628380/free-photo-of-modern-high-rise-construction-site-with-crane.jpeg?cs=tinysrgb&dpr=1&w=800') center/cover no-repeat;
  background-color: var(--slate);
}
.tile-4::before {
  background: linear-gradient(180deg, rgba(37,37,37,.25), rgba(37,37,37,.78)),
              url('https://images.pexels.com/photos/8961260/pexels-photo-8961260.jpeg?cs=tinysrgb&dpr=1&w=800') center/cover no-repeat;
  background-color: var(--slate);
}
.tile-5::before {
  background: linear-gradient(180deg, rgba(37,37,37,.25), rgba(37,37,37,.78)),
              url('https://images.pexels.com/photos/27180835/pexels-photo-27180835/free-photo-of-low-angle-shot-of-utility-poles-and-electricity-lines.jpeg?cs=tinysrgb&dpr=1&w=800') center/cover no-repeat;
  background-color: var(--slate);
}
.tile-6::before {
  background: linear-gradient(180deg, rgba(37,37,37,.25), rgba(37,37,37,.78)),
              url('https://images.pexels.com/photos/8962803/pexels-photo-8962803.jpeg?cs=tinysrgb&dpr=1&w=800') center/cover no-repeat;
  background-color: var(--slate);
}
.tile-7::before {
  background: linear-gradient(180deg, rgba(37,37,37,.25), rgba(37,37,37,.78)),
              url('https://images.pexels.com/photos/33041841/pexels-photo-33041841/free-photo-of-high-voltage-electrical-substation-in-open-field.jpeg?cs=tinysrgb&dpr=1&w=800') center/cover no-repeat;
  background-color: var(--slate);
}
.tile-8::before {
  background: linear-gradient(180deg, rgba(37,37,37,.25), rgba(37,37,37,.78)),
              url('https://images.pexels.com/photos/16651088/pexels-photo-16651088/free-photo-of-fabric-rooftop-and-cables-against-blue-sky.jpeg?cs=tinysrgb&dpr=1&w=800') center/cover no-repeat;
  background-color: var(--slate);
}
.tile-9::before {
  background: linear-gradient(180deg, rgba(37,37,37,.25), rgba(37,37,37,.78)),
              url('https://images.pexels.com/photos/9784173/pexels-photo-9784173.jpeg?cs=tinysrgb&dpr=1&w=800') center/cover no-repeat;
  background-color: var(--slate);
}
.tile-10::before {
  background: linear-gradient(180deg, rgba(37,37,37,.25), rgba(37,37,37,.78)),
              url('https://images.pexels.com/photos/5476051/pexels-photo-5476051.jpeg?cs=tinysrgb&dpr=1&w=800') center/cover no-repeat;
  background-color: var(--slate);
}
.tile-index {
  position: absolute; top: 16px; left: 20px;
  font-size: 12px; letter-spacing: .16em; color: rgba(255, 255, 255, .6);
}
.industry-tile h3 { font-size: 16px; font-weight: 500; margin-bottom: 6px; line-height: 1.35; }
.industry-tile p {
  font-size: 12.5px; color: rgba(255, 255, 255, .78);
  max-height: 0; opacity: 0; overflow: hidden;
  transition: max-height .4s ease, opacity .4s ease;
}
.industry-tile:hover p { max-height: 60px; opacity: 1; }
.industry-tile::after {
  content: "→"; position: absolute; right: 18px; bottom: 18px;
  font-size: 17px; color: rgba(255, 255, 255, .85);
  transform: translateX(-8px); opacity: 0;
  transition: transform .3s ease, opacity .3s ease;
}
.industry-tile:hover::after { transform: translateX(0); opacity: 1; }

/* ============ 资质荣誉 ============ */
.qualifications { background: var(--bg-light); }
.qual-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.qual-card {
  background: var(--white);
  padding: 26px 24px 24px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: transform .3s ease, box-shadow .3s ease;
}
.qual-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lift); }
.qual-badge {
  display: inline-block;
  background: var(--orange);
  color: var(--white);
  font-size: 11px; font-weight: 600;
  letter-spacing: .06em;
  padding: 4px 10px;
  margin-bottom: 14px;
}
.qual-b { background: var(--steel); }
.qual-cert { background: var(--slate); }
.qual-card h3 { font-size: 16.5px; font-weight: 500; margin-bottom: 10px; line-height: 1.35; }
.qual-card p { font-size: 13px; color: var(--grey-600); line-height: 1.65; }

/* ============ 特色解决方案（深色） ============ */
.solutions { background: var(--slate); color: var(--white); }
.solutions-inner {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 72px; align-items: center;
}
.solutions-desc { margin: 18px 0 32px; color: rgba(255, 255, 255, .78); }
.solutions-list li {
  display: flex; gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid rgba(255, 255, 255, .14);
}
.solutions-list li:first-child { padding-top: 0; }
.solutions-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.sol-marker {
  flex-shrink: 0; width: 10px; height: 10px;
  background: var(--orange); margin-top: 9px;
}
.solutions-list h3 { font-size: 18.5px; font-weight: 500; margin-bottom: 6px; }
.solutions-list p { font-size: 14.5px; color: rgba(255, 255, 255, .72); }

/* ============ 新闻卡片 ============ */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  background: var(--white);
  box-shadow: var(--shadow-card);
  transition: transform .3s ease, box-shadow .3s ease;
  display: flex; flex-direction: column;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lift); }
.news-cover {
  height: 180px; position: relative;
  display: flex; align-items: flex-end; padding: 18px;
}
.cover-a { background: linear-gradient(140deg, #49738b, #22333b); }
.cover-b { background: linear-gradient(140deg, #799eaf, #3c515b); }
.cover-c { background: linear-gradient(140deg, #ca4300, #8e2600); }
.news-tag {
  background: var(--white); color: var(--ink);
  font-size: 12px; font-weight: 600; letter-spacing: .06em;
  padding: 5px 12px;
}
.news-body { padding: 24px 26px 28px; }
.news-body time { font-size: 13px; color: var(--grey-500); letter-spacing: .04em; }
.news-body h3 {
  font-size: 18px; font-weight: 500; line-height: 1.5;
  margin: 10px 0 10px;
  transition: color .25s;
}
.news-card:hover .news-body h3 { color: var(--orange); }
.news-body p { font-size: 14px; color: var(--grey-600); }

/* ============ 精品案例 ============ */
.cases { background: var(--bg-light); }
.cases-subtitle { font-size: 22px; font-weight: 400; margin-bottom: 24px; color: var(--ink); }
.featured-cases { margin-bottom: 56px; }
.cases-accordion { max-width: 100%; }
.accordion-item {
  background: var(--white);
  box-shadow: var(--shadow-card);
  margin-bottom: 16px;
  overflow: hidden;
}
.accordion-header {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  border: 0; cursor: pointer;
  color: var(--white);
  font: inherit; text-align: left;
  position: relative;
}
.accordion-title { font-size: 17px; font-weight: 500; }
.accordion-meta { font-size: 13px; opacity: .8; margin-left: auto; }
.accordion-icon { font-size: 20px; font-weight: 300; width: 24px; text-align: center; }
.accordion-body {
  max-height: 0; opacity: 0; overflow: hidden;
  transition: max-height .4s ease, opacity .3s ease;
}
.accordion-item.is-open .accordion-body { max-height: 2200px; opacity: 1; }
.case-list {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 28px;
  padding: 22px 24px;
}
.case-list li {
  font-size: 14px; color: var(--grey-700);
  line-height: 1.6; padding-left: 14px; position: relative;
}
.case-list li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--orange);
}

/* ============ 关于我们 ============ */
.about { background: var(--bg-light); }
.about-inner { max-width: 760px; }
.about-desc { margin: 18px 0 32px; color: var(--grey-700); font-size: 17px; }

/* ============ CTA 横幅 ============ */
.cta-banner { background: var(--orange); color: var(--white); }
.cta-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px; padding: 64px 24px;
}
.cta-inner h2 { font-size: clamp(26px, 3vw, 34px); font-weight: 400; margin-bottom: 8px; }
.cta-inner p { color: rgba(255, 255, 255, .85); }

/* ============ 报告查验弹窗 ============ */
.modal {
  position: fixed; inset: 0; z-index: 1100;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  opacity: 0; visibility: hidden;
  transition: opacity .25s ease, visibility .25s ease;
}
.modal.is-open { opacity: 1; visibility: visible; }
.modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(37, 37, 37, .72);
  backdrop-filter: blur(4px);
}
.modal-dialog {
  position: relative; z-index: 1;
  width: min(720px, 100%);
  max-height: calc(100vh - 48px);
  background: var(--white);
  border-radius: 2px;
  box-shadow: 0 24px 60px rgba(0,0,0,.28);
  display: flex; flex-direction: column;
  transform: translateY(16px);
  transition: transform .25s ease;
}
.modal.is-open .modal-dialog { transform: translateY(0); }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--grey-200);
}
.modal-header h3 { font-size: 20px; font-weight: 500; color: var(--ink); }
.modal-close {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border: 0; border-radius: 50%;
  background: var(--grey-100); color: var(--grey-600);
  font-size: 24px; line-height: 1; cursor: pointer;
  transition: background .2s, color .2s;
}
.modal-close:hover { background: var(--grey-200); color: var(--ink); }
.modal-body { padding: 24px; overflow-y: auto; }
.modal-intro { color: var(--grey-600); margin-bottom: 18px; font-size: 15px; }
.report-form {
  display: flex; gap: 12px; margin-bottom: 18px;
}
.report-form input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--grey-300);
  border-radius: var(--radius-btn);
  font: inherit; font-size: 15px;
  outline: none;
  transition: border-color .2s;
}
.report-form input:focus { border-color: var(--orange); }
.report-result { margin-top: 8px; }
.report-result-card {
  border-radius: var(--radius-btn);
  padding: 22px;
  border-left: 4px solid var(--grey-400);
  background: var(--bg-light);
}
.report-result-card.is-valid { border-left-color: #16a34a; background: #f0fdf4; }
.report-result-card.is-expired { border-left-color: var(--orange); background: #fff7ed; }
.report-result-card.is-revoked { border-left-color: #c62828; background: #fef2f2; }
.report-result-card.is-notfound { border-left-color: var(--grey-500); background: var(--grey-100); }
.report-result-status { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 500; margin-bottom: 14px; }
.report-result-status .status-dot { width: 10px; height: 10px; border-radius: 50%; }
.report-result-card.is-valid .status-dot { background: #16a34a; }
.report-result-card.is-expired .status-dot { background: var(--orange); }
.report-result-card.is-revoked .status-dot { background: #c62828; }
.report-result-card.is-notfound .status-dot { background: var(--grey-500); }
.report-result-meta { display: grid; gap: 9px; font-size: 14px; color: var(--grey-700); }
.report-result-meta strong { color: var(--ink); font-weight: 500; }
.report-result-error { color: #c62828; font-size: 14px; text-align: center; padding: 14px; }
.report-result-loading { color: var(--grey-600); font-size: 14px; text-align: center; padding: 16px; }
.report-help {
  margin-top: 18px;
  font-size: 13px;
  color: var(--grey-500);
  text-align: center;
}
.report-help a {
  color: var(--orange);
  text-decoration: none;
  font-weight: 500;
}
.report-help a:hover { text-decoration: underline; }

/* ============ 页脚 ============ */
.site-footer { background: var(--ink); color: rgba(255, 255, 255, .72); }
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 1.2fr;
  gap: 40px; padding: 72px 24px 56px;
}
.brand-footer .brand-text strong { color: var(--white); }
.footer-brand p { margin: 18px 0 22px; font-size: 14px; max-width: 280px; }
.footer-about-text { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,.72); }
.footer-col h4 {
  color: var(--white); font-size: 15px; font-weight: 600;
  margin-bottom: 18px; letter-spacing: .04em;
}
.footer-col a { display: block; font-size: 14px; padding: 5px 0; transition: color .2s; }
.footer-col a:hover { color: var(--white); }
.footer-contact { font-size: 14px; padding: 5px 0; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .12); }
.footer-bottom-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  padding: 20px 24px; font-size: 13px; color: rgba(255, 255, 255, .5);
}
.footer-legal { display: flex; gap: 20px; }
.footer-legal a:hover { color: var(--white); }

/* ============ 滚动显现动画 ============ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ============ 在线咨询组件 ============ */
.chat-widget {
  position: fixed; right: 22px; bottom: 22px;
  z-index: 200; display: flex; flex-direction: column; align-items: flex-end;
}
.chat-button {
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--orange); color: var(--white);
  border: none; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  box-shadow: 0 6px 22px rgba(202, 67, 0, .38);
  transition: transform .25s ease, box-shadow .25s ease;
}
.chat-button:hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgba(202, 67, 0, .48); }
.chat-label { font-size: 10px; font-weight: 500; margin-top: 2px; letter-spacing: .04em; }
.chat-panel {
  position: absolute; right: 0; bottom: 78px;
  width: 300px; max-height: 0; opacity: 0; overflow: hidden;
  background: var(--white); border-radius: 4px;
  box-shadow: 0 14px 40px rgba(37, 37, 37, .2);
  transform: translateY(12px);
  transition: max-height .35s ease, opacity .28s ease, transform .28s ease;
}
.chat-widget.is-open .chat-panel {
  max-height: 520px; opacity: 1; overflow: visible;
  transform: translateY(0);
}
.chat-header {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--orange); color: var(--white);
  padding: 14px 18px; font-size: 16px; font-weight: 500;
}
.chat-close {
  background: none; border: none; color: var(--white);
  font-size: 22px; line-height: 1; cursor: pointer; padding: 0 2px;
}
.chat-body { padding: 18px; }
.chat-hint { font-size: 13.5px; color: var(--grey-600); margin-bottom: 12px; }
.chat-types {
  display: flex; flex-wrap: wrap; gap: 8px;
  max-height: 220px; overflow-y: auto; margin-bottom: 16px;
}
.chat-types li a {
  display: block; padding: 7px 12px;
  background: var(--bg-light); color: var(--ink);
  font-size: 13px; border-radius: var(--radius-btn);
  border: 1px solid var(--grey-200);
  transition: background .2s, border-color .2s, color .2s;
}
.chat-types li a:hover { background: var(--orange); color: var(--white); border-color: var(--orange); }
.chat-contact p { font-size: 13px; color: var(--grey-600); margin-bottom: 10px; }
.chat-contact strong { color: var(--ink); font-weight: 600; }
.chat-contact a { color: var(--orange); font-weight: 500; }

/* ============ 响应式 ============ */
@media (max-width: 1200px) { .industry-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 1024px) {
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .industry-grid { grid-template-columns: repeat(3, 1fr); }
  .solutions-inner { grid-template-columns: 1fr; gap: 44px; }
  .qual-grid { grid-template-columns: repeat(3, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
  .container { padding: 0 18px; }
  .section { padding: 56px 0; }
  .section-title { font-size: clamp(26px, 7vw, 34px); }
  .section-head { margin-bottom: 36px; }
  .section-head-row { flex-direction: column; align-items: flex-start; gap: 12px; }
  .section-desc { font-size: 15px; }

  .brand { gap: 8px; }
  .brand-mark-img { height: 36px; }
  .brand-text strong { font-size: 15px; }
  .brand-text strong.brand-branch { font-size: 14px; }
  .brand-text small { font-size: 9px; }

  .hero-content { padding-top: 24px; padding-bottom: 70px; }
  .hero-eyebrow { font-size: 12px; letter-spacing: .18em; gap: 10px; margin-bottom: 16px; }
  .hero-eyebrow::before { width: 28px; }
  .hero-title { font-size: clamp(34px, 10vw, 52px); margin-bottom: 18px; }
  .rotator { min-width: 6.8em; height: 1.18em; }
  .hero-sub { font-size: 15px; margin-bottom: 28px; }
  .hero-cta { flex-direction: column; gap: 12px; }
  .hero-cta .btn { width: 100%; }

  .stats-grid { grid-template-columns: 1fr 1fr; gap: 20px 0; padding: 36px 18px; }
  .stat-item { border: 0; padding: 12px 0; }
  .stat-num { font-size: 34px; }
  .stat-label { font-size: 13px; }

  .service-grid { grid-template-columns: 1fr; gap: 16px; }
  .service-card { padding: 22px; }
  .service-icon { width: 44px; height: 44px; }
  .service-card h3 { font-size: 17px; }

  .industry-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .industry-tile { min-height: 120px; padding: 16px; }
  .tile-title { font-size: 15px; }
  .tile-desc { font-size: 12px; }

  .qual-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .qual-card { padding: 18px; }
  .qual-card h3 { font-size: 15px; }
  .qual-card p { font-size: 13px; }

  .solutions-inner { gap: 32px; }
  .solutions-list li { font-size: 14px; }

  .news-grid { grid-template-columns: 1fr; }
  .news-card { max-width: 100%; }
  .news-cover { height: 160px; }
  .case-list { grid-template-columns: 1fr; padding: 18px; }

  .featured-cases { margin-bottom: 40px; }
  .cases-subtitle { font-size: 20px; margin-bottom: 18px; }
  .accordion-header { padding: 16px 18px; }
  .accordion-title { font-size: 15px; }

  .about-inner { padding: 0 6px; }
  .about-desc { font-size: 15px; }

  .cta-inner { flex-direction: column; text-align: center; gap: 20px; padding: 48px 18px; }
  .cta-inner h2 { font-size: 26px; }

  .footer-grid { grid-template-columns: 1fr; gap: 28px 0; }
  .footer-brand p { max-width: 100%; }
  .footer-col h4 { margin-bottom: 12px; }
  .footer-bottom-inner { flex-direction: column; text-align: center; gap: 12px; padding: 22px 0; }
  .footer-legal { flex-wrap: wrap; justify-content: center; gap: 14px; }

  .hero-scroll { display: none; }
  .br-pc { display: none; }

  .modal { padding: 16px; }
  .modal-dialog { max-height: calc(100vh - 32px); }
  .modal-body { padding: 18px; }
  .report-form { flex-direction: column; }
  .report-result-card { padding: 18px; }
}
@media (max-width: 480px) {
  .industry-grid { grid-template-columns: 1fr; }
  .qual-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-item { border: 0; }
  .utility-links { display: none; }
  .utility-inner { justify-content: flex-end; }
  .about-desc { font-size: 15px; }
  .btn-lg { padding: 14px 28px; font-size: 15px; }
}