/* =========================================================
   成都绿成环保技术研究所 · 响应式首页样式
   主题：环保绿 / 青蓝，适配电脑、平板、手机
   ========================================================= */

:root {
  --green-900: #0b5132;
  --green-700: #1e7d4f;
  --green-500: #2e9e5b;
  --green-400: #3fbf7f;
  --teal-600:  #0e7c86;
  --teal-400:  #14a3ad;
  --lime-400:  #8bc34a;
  --ink:       #1f2d27;
  --ink-soft:  #56665e;
  --bg:        #ffffff;
  --bg-alt:    #f3f9f5;
  --line:      #e2ece6;
  --shadow:    0 10px 30px rgba(14, 124, 134, .10);
  --radius:    16px;
  --maxw:      1180px;
  --header-h:  72px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===================== 顶部导航 ===================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, .85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s, background .3s;
}
.site-header.scrolled { box-shadow: 0 4px 18px rgba(0, 0, 0, .06); }

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 19px; color: var(--green-700); letter-spacing: .5px; }
.brand-text small { font-size: 11px; color: var(--ink-soft); }

.main-nav { display: flex; gap: 28px; }
.main-nav a {
  position: relative;
  font-size: 15px;
  color: var(--ink);
  padding: 6px 0;
  transition: color .2s;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--green-500), var(--teal-600));
  transition: width .25s;
}
.main-nav a:hover { color: var(--green-700); }
.main-nav a:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 20px; height: 2px;
  margin: 0 auto;
  background: var(--green-700);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===================== Hero ===================== */
.hero {
  position: relative;
  min-height: 86vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg svg { width: 100%; height: 100%; }

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
  padding-top: 40px;
  padding-bottom: 40px;
}
.hero-eyebrow {
  font-size: 13px;
  letter-spacing: 3px;
  opacity: .85;
  margin: 0 0 14px;
}
.hero h1 {
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.18;
  margin: 0 0 20px;
  font-weight: 800;
  text-shadow: 0 2px 18px rgba(0, 0, 0, .18);
}
.hero-sub {
  font-size: clamp(15px, 1.7vw, 19px);
  opacity: .95;
  max-width: 620px;
  margin: 0 0 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform .2s, box-shadow .2s, background .2s, color .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: #fff;
  color: var(--green-700);
  box-shadow: 0 8px 22px rgba(0, 0, 0, .15);
}
.btn-primary:hover { background: #f0faf4; }
.btn-ghost {
  background: rgba(255, 255, 255, .12);
  color: #fff;
  border-color: rgba(255, 255, 255, .6);
}
.btn-ghost:hover { background: rgba(255, 255, 255, .22); }
.btn-block { width: 100%; }

.hero-scroll {
  position: absolute;
  left: 50%; bottom: 22px;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 2px solid rgba(255, 255, 255, .7);
  border-radius: 14px;
  z-index: 1;
}
.hero-scroll span {
  position: absolute;
  left: 50%; top: 8px;
  width: 4px; height: 8px;
  margin-left: -2px;
  background: #fff;
  border-radius: 2px;
  animation: scrollDot 1.6s infinite;
}
@keyframes scrollDot {
  0% { opacity: 0; transform: translateY(0); }
  40% { opacity: 1; }
  100% { opacity: 0; transform: translateY(14px); }
}

/* ===================== 通用区块 ===================== */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-alt); }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.section-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--teal-600);
  font-weight: 700;
  margin-bottom: 10px;
}
.section-head h2 {
  font-size: clamp(24px, 3.2vw, 36px);
  margin: 0 0 12px;
  color: var(--green-900);
  font-weight: 800;
}
.section-desc { color: var(--ink-soft); margin: 0; font-size: 16px; }

/* ===================== 单位简介 ===================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
  align-items: center;
}
.about-text p { margin: 0 0 16px; color: var(--ink); }
.about-points { list-style: none; padding: 0; margin: 22px 0 0; }
.about-points li {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 12px; color: var(--ink-soft);
}
.about-points .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: linear-gradient(135deg, var(--green-400), var(--teal-600));
  flex: none;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.stat-card {
  background: linear-gradient(160deg, #ffffff, #f1faf4);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 20px;
  text-align: center;
  box-shadow: var(--shadow);
}
.stat-num {
  font-size: 42px; font-weight: 800;
  color: var(--green-700);
  line-height: 1;
}
.stat-unit { font-size: 22px; font-weight: 800; color: var(--teal-600); }
.stat-card p { margin: 10px 0 0; font-size: 14px; color: var(--ink-soft); }

/* ===================== 业务板块 ===================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: var(--green-400);
}
.card-icon {
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  background: linear-gradient(135deg, #eafaf0, #e2f5f7);
  border-radius: 14px;
  margin-bottom: 18px;
}
.card h3 { margin: 0 0 10px; font-size: 19px; color: var(--green-900); }
.card p { margin: 0; color: var(--ink-soft); font-size: 15px; }

/* ===================== 业务板块（展开式分类） ===================== */
.biz-groups { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.biz-group {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.biz-group-head { display: flex; align-items: center; gap: 14px; margin: 0; padding: 20px 24px 14px; }
.biz-group-head h3 { margin: 0; font-size: 19px; color: var(--green-900); line-height: 1.3; }
.biz-num {
  width: 42px; height: 42px; flex: none; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--green-400), var(--teal-600));
  color: #fff; font-weight: 800; font-size: 16px; letter-spacing: .5px;
}
.biz-list { list-style: none; margin: 0; padding: 0 24px 22px; display: grid; gap: 4px; }
.biz-list li {
  position: relative;
  padding: 11px 0 11px 16px;
  border-top: 1px dashed var(--line);
}
.biz-list li:first-child { border-top: none; padding-top: 2px; }
.biz-list li::before {
  content: "";
  position: absolute; left: 0; top: 15px; bottom: 15px; width: 4px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--green-400), var(--teal-600));
}
.biz-list strong { display: block; color: var(--ink); font-size: 15px; font-weight: 700; }
.biz-list span { display: block; color: var(--ink-soft); font-size: 13.5px; margin-top: 2px; line-height: 1.55; }

/* ===================== 环保设备 ===================== */
.equip-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.equip {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .25s, box-shadow .25s;
}
.equip:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.equip-thumb {
  height: 130px;
  display: flex; align-items: center; justify-content: center;
  font-size: 48px;
  background: linear-gradient(135deg, #eafaf0, #e2f5f7);
}
.equip-body { padding: 22px 22px 26px; }
.equip-body h3 { margin: 0 0 8px; font-size: 17px; color: var(--green-900); }
.equip-body p { margin: 0; color: var(--ink-soft); font-size: 14px; }

/* ===================== 人员培训 ===================== */
.training-wrap {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: center;
}
.training-intro p { font-size: 16px; color: var(--ink); margin: 0 0 22px; }
.training-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.training-list li {
  display: flex; gap: 16px; align-items: flex-start;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.training-list .t-ico {
  font-size: 26px; flex: none;
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #eafaf0, #e2f5f7);
  border-radius: 12px;
}
.training-list strong { color: var(--green-900); }
.training-list p { margin: 4px 0 0; color: var(--ink-soft); font-size: 14px; }

@media (max-width: 720px) {
  .training-list { grid-template-columns: 1fr; }
}


/* ===================== 证书查询 ===================== */
.cert-query {
  margin-top: 40px;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px 28px;
  padding: 24px 30px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--teal-600), var(--green-500));
  color: #fff;
  box-shadow: var(--shadow);
}
.cert-form {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
}
.cert-form .field { flex: 1 1 200px; margin: 0; }
.cert-form .field label { color: #fff; }
.cert-form .field input {
  width: 100%;
  margin-top: 6px;
  padding: 11px 12px;
  border: 1px solid rgba(255, 255, 255, .5);
  border-radius: 10px;
  background: rgba(255, 255, 255, .96);
  color: var(--ink);
  font: inherit;
}
.cert-form .btn-cert { flex: 0 0 auto; }
.cert-result {
  flex: 1 1 100%;
  border-radius: 12px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, .16);
  border: 1px solid rgba(255, 255, 255, .25);
}
.cert-result.no { background: rgba(255, 255, 255, .12); }
.cert-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, .18);
}
.cert-row:last-child { border-bottom: none; }
.cert-row span { opacity: .85; flex: none; }
.cert-row b { font-weight: 700; text-align: right; }
.cert-query-text { flex: 1 1 320px; min-width: 260px; }
.cert-badge {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 1px;
  background: rgba(255, 255, 255, .18);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.cert-query-text h3 { margin: 0 0 8px; font-size: 22px; font-weight: 800; }
.cert-query-text p { margin: 0; font-size: 15px; opacity: .95; }
.btn-cert {
  background: #fff;
  color: var(--teal-600);
  white-space: nowrap;
  box-shadow: 0 8px 22px rgba(0, 0, 0, .15);
}
.btn-cert:hover { background: #f0faf4; }
@media (max-width: 720px) {
  .cert-query { flex-direction: column; align-items: stretch; }
  .cert-form { flex-direction: column; align-items: stretch; }
  .cert-form .btn-cert { width: 100%; }
}



/* ===================== 联系方式 ===================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}
.contact-info { display: grid; gap: 16px; align-content: start; }
.info-item {
  display: flex; gap: 16px; align-items: flex-start;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.info-item .i-ico {
  font-size: 22px; flex: none;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: #fff; border-radius: 12px;
  box-shadow: var(--shadow);
}
.info-item strong { display: block; color: var(--green-900); }
.info-item p { margin: 2px 0 0; color: var(--ink-soft); font-size: 14px; }


.contact-form {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; color: var(--ink); margin-bottom: 6px; font-weight: 600; }
.field input, .field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  background: #fbfdfc;
  transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--green-400);
  box-shadow: 0 0 0 3px rgba(63, 191, 127, .18);
}
.field textarea { resize: vertical; }
.form-tip { color: var(--green-700); font-size: 14px; margin: 14px 0 0; }

/* ===================== 页脚 ===================== */
.site-footer { background: var(--green-900); color: #d8efe2; }
.footer-inner {
  display: flex; flex-wrap: wrap; gap: 24px;
  justify-content: space-between; align-items: center;
  padding: 44px 20px;
}
.footer-brand strong { color: #fff; font-size: 18px; }
.footer-brand p { margin: 6px 0 0; font-size: 13px; opacity: .8; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 20px; }
.footer-nav a { font-size: 14px; opacity: .9; transition: opacity .2s; }
.footer-nav a:hover { opacity: 1; color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12);
  font-size: 12px;
}
.footer-bottom .container {
  display: flex; flex-wrap: wrap; gap: 8px;
  justify-content: space-between;
  padding: 16px 20px;
  opacity: .8;
}
.footer-bottom .beian-links { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-bottom .beian-links a {
  color: #d8efe2;
  opacity: .9;
  transition: opacity .2s, color .2s;
}
.footer-bottom .beian-links a:hover { opacity: 1; color: #fff; text-decoration: underline; }

/* ===================== 滚动出现动画 ===================== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ===================== 响应式 ===================== */
@media (max-width: 980px) {
  .about-grid, .training-wrap, .contact-grid { grid-template-columns: 1fr; }
  .card-grid, .equip-grid, .biz-groups { grid-template-columns: repeat(2, 1fr); }
  .training-intro { order: -1; }
}

@media (max-width: 720px) {
  .section { padding: 60px 0; }
  .nav-toggle { display: flex; }
  .main-nav {
    position: absolute;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px rgba(0, 0, 0, .08);
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
  }
  .main-nav.open { max-height: 320px; }
  .main-nav a { padding: 16px 24px; border-top: 1px solid var(--line); }
  .main-nav a::after { display: none; }

  .hero { min-height: 78vh; }
  .card-grid, .equip-grid, .biz-groups { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .brand-text small { display: none; }
  .about-stats { grid-template-columns: 1fr; }
}