/* =====================================================================
   河北创拓管道科技有限公司 官网样式
   主色:浅蓝 #2E7BB6 + 灰  干净简约工业商务风
   ===================================================================== */

:root {
  --c-primary: #2E7BB6;
  --c-primary-dark: #236899;
  --c-primary-light: #E8F2FA;
  --c-text: #2C3E50;
  --c-text-light: #5A6B7B;
  --c-gray: #8899A6;
  --c-border: #DDE3E8;
  --c-bg: #F5F7FA;
  --c-white: #FFFFFF;
  --c-accent: #E67E22;
  --c-accent-dark: #D35400;
  --shadow: 0 2px 8px rgba(44,62,80,.08);
  --shadow-hover: 0 6px 20px rgba(44,62,80,.12);
  --radius: 6px;
  --max-width: 1200px;
  --header-h: 72px;
}

/* ---------- Reset ---------- */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  font-family: "Microsoft YaHei","PingFang SC","Helvetica Neue",Helvetica,Arial,sans-serif;
  font-size: 15px; line-height: 1.7; color: var(--c-text); background: var(--c-white);
  -webkit-font-smoothing: antialiased; overflow-x: hidden; width: 100%;
}
img { max-width: 100%; display: block; }
a { color: var(--c-primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--c-primary-dark); }
ul,ol { list-style: none; }
h1,h2,h3,h4,h5 { font-weight: 600; line-height: 1.3; }

/* ---------- Layout ---------- */
main { display: block; margin: 0; padding: 0; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.section { padding: 56px 0; }
.section--gray { background: var(--c-bg); }
.section--primary { background: var(--c-primary); color: #fff; }
.text-center { text-align: center; }

.section-title { text-align: center; margin-bottom: 10px; font-size: 28px; color: var(--c-text); }
.section-title::after { content: ''; display: block; width: 50px; height: 3px; background: var(--c-primary); margin: 12px auto 0; }
.section-subtitle { text-align: center; color: var(--c-text-light); margin-bottom: 40px; font-size: 15px; }

/* ---------- Header ---------- */
.site-header { position: sticky; top: 0; z-index: 100; background: #fff; border-bottom: 1px solid var(--c-border); box-shadow: var(--shadow); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark { width: 44px; height: 44px; background: var(--c-primary); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 20px; flex-shrink: 0; }
.logo-text { line-height: 1.2; }
.logo-text .lt-main { font-size: 17px; font-weight: 700; color: var(--c-text); }
.logo-text .lt-sub { font-size: 12px; color: var(--c-text-light); letter-spacing: 1px; }

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a { padding: 10px 16px; color: var(--c-text); font-size: 15px; border-radius: var(--radius); transition: all .2s; }
.main-nav a:hover, .main-nav a.active { color: var(--c-primary); background: var(--c-primary-light); }
.header-phone { display: flex; align-items: center; gap: 8px; color: var(--c-primary); font-weight: 700; font-size: 20px; }
.header-phone .hp-icon { width: 36px; height: 36px; background: var(--c-primary-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; background: none; border: none; }
.nav-toggle span { width: 24px; height: 3px; background: var(--c-text); border-radius: 2px; transition: .3s; }

/* ---------- Banner ---------- */
.hero { position: relative; background: linear-gradient(135deg, #1a5a8a 0%, #2E7BB6 50%, #4A90C8 100%); color: #fff; overflow: hidden; }
.hero-inner { position: relative; padding: 90px 20px; max-width: var(--max-width); margin: 0 auto; }
.hero h1 { font-size: 40px; margin-bottom: 16px; }
.hero p { font-size: 19px; opacity: .92; max-width: 560px; margin-bottom: 28px; }
.hero .btn { margin-right: 12px; }

/* ---------- Banner 轮播 ---------- */
.hero-slider { position: relative; overflow: hidden; height: 500px; }
.hero-slide { position: relative; width: 100%; height: 100%; opacity: 1; transition: opacity .3s ease; z-index: 1; background: linear-gradient(135deg, #1a5a8a 0%, #2E7BB6 50%, #4A90C8 100%); color: #fff; overflow: hidden; background-size: cover; background-position: center; }
.hero-dots { position: absolute; bottom: 24px; left: 0; right: 0; text-align: center; z-index: 10; }
.hero-dot { display: inline-block; width: 12px; height: 12px; margin: 0 5px; border-radius: 50%; background: rgba(255,255,255,.4); cursor: pointer; transition: background .2s; }
.hero-dot.active { background: #fff; }
.hero-dot:hover { background: rgba(255,255,255,.7); }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 12px 28px; border-radius: var(--radius); font-size: 15px; font-weight: 600; border: 2px solid transparent; cursor: pointer; transition: all .2s; }
.btn--primary { background: var(--c-primary); color: #fff; }
.btn--primary:hover { background: var(--c-primary-dark); color: #fff; }
.btn--white { background: rgba(255,255,255,.15); color: #fff; border-color: rgba(255,255,255,.5); }
.btn--white:hover { background: #fff; color: var(--c-primary); }
.btn--accent { background: var(--c-accent); color: #fff; }
.btn--accent:hover { background: var(--c-accent-dark); color: #fff; }
.btn--outline { background: transparent; color: var(--c-primary); border-color: var(--c-primary); }
.btn--outline:hover { background: var(--c-primary); color: #fff; }
.btn--lg { padding: 14px 34px; font-size: 16px; }
.btn--sm { padding: 8px 18px; font-size: 13px; }
.btn--block { display: flex; width: 100%; justify-content: center; }

/* ---------- Intro One-liner ---------- */
.intro-one { text-align: center; max-width: 820px; margin: 0 auto; padding: 0 20px; }
.intro-one p { font-size: 19px; color: var(--c-text-light); line-height: 1.8; }

/* ---------- Grid ---------- */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- Product Card ---------- */
.product-card { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden; transition: box-shadow .25s, transform .25s; }
.product-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.product-card__img { aspect-ratio: 4/3; background: var(--c-bg); overflow: hidden; }
.product-card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.product-card:hover .product-card__img img { transform: scale(1.04); }
.product-card__body { padding: 18px; }
.product-card__body h3 { font-size: 17px; margin-bottom: 6px; }
.product-card__body .pc-specs { color: var(--c-primary); font-size: 13px; margin-bottom: 8px; }
.product-card__body .pc-summary { color: var(--c-text-light); font-size: 13px; line-height: 1.6; }

/* ---------- Advantages ---------- */
.advantage-card { text-align: center; padding: 32px 20px; background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); transition: box-shadow .25s; }
.advantage-card:hover { box-shadow: var(--shadow-hover); }
.advantage-card__icon { width: 64px; height: 64px; margin: 0 auto 16px; background: var(--c-primary-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--c-primary); }
.advantage-card h3 { font-size: 18px; margin-bottom: 8px; }
.advantage-card p { color: var(--c-text-light); font-size: 14px; }

/* ---------- Case Card ---------- */
.case-card { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden; transition: box-shadow .25s, transform .25s; }
.case-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.case-card__img { aspect-ratio: 16/9; background: var(--c-bg); overflow: hidden; }
.case-card__img img { width: 100%; height: 100%; object-fit: cover; }
.case-card__body { padding: 18px; }
.case-card__body h3 { font-size: 17px; margin-bottom: 6px; }
.case-card__body .cc-date { color: var(--c-gray); font-size: 13px; margin-bottom: 8px; }
.case-card__body .cc-text { color: var(--c-text-light); font-size: 13px; line-height: 1.6; }

/* ---------- Footer ---------- */
.site-footer { background: #1E2D3A; color: #B0BCC8; padding: 48px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; padding-bottom: 36px; border-bottom: 1px solid #2C3E50; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 14px; }
.footer-col p { font-size: 14px; line-height: 2; }
.footer-col a { color: #B0BCC8; }
.footer-col a:hover { color: #fff; }
.footer-contact-item { display: flex; align-items: flex-start; gap: 8px; margin-bottom: 8px; }
.footer-contact-item .fci-label { color: #7A8B99; width: 70px; flex-shrink: 0; }
.footer-bottom { padding: 18px 0; text-align: center; font-size: 13px; color: #7A8B99; }
.footer-bottom a { color: #7A8B99; }

/* ---------- Breadcrumb ---------- */
.breadcrumb { padding: 16px 0; font-size: 13px; color: var(--c-text-light); }
.breadcrumb a { color: var(--c-text-light); }
.breadcrumb a:hover { color: var(--c-primary); }

/* ---------- Page header banner ---------- */
.page-banner { background: linear-gradient(135deg, #1a5a8a 0%, #2E7BB6 100%); color: #fff; padding: 50px 0; text-align: center; position: relative; overflow: hidden; }
.page-banner::before { content: ''; position: absolute; inset: 0; opacity: .1; background-image: repeating-linear-gradient(45deg, #fff 0 2px, transparent 2px 40px); }
.page-banner h1 { position: relative; font-size: 30px; margin-bottom: 6px; }
.page-banner p { position: relative; opacity: .85; }

/* ---------- Product detail ---------- */
.detail-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.detail-img { border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden; background: var(--c-bg); }
.detail-img img { width: 100%; }
.detail-info h1 { font-size: 26px; margin-bottom: 12px; }
.detail-info .di-specs { color: var(--c-primary); font-size: 15px; margin-bottom: 16px; padding: 12px 16px; background: var(--c-primary-light); border-radius: var(--radius); }
.detail-info .di-scenes { margin-bottom: 20px; }
.detail-info .di-scenes strong { display: block; margin-bottom: 4px; }
.detail-info .di-scenes span { color: var(--c-text-light); }
.spec-table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.spec-table th, .spec-table td { border: 1px solid var(--c-border); padding: 10px 14px; text-align: left; font-size: 14px; }
.spec-table th { background: var(--c-bg); width: 130px; }
.detail-content { margin-top: 24px; line-height: 1.9; }
.detail-content h4 { margin: 18px 0 10px; }
.detail-content ul { list-style: disc; padding-left: 22px; }
.detail-content li { margin-bottom: 6px; }

/* ---------- Case gallery ---------- */
.case-gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px,1fr)); gap: 12px; margin: 20px 0; }
.case-gallery img { border-radius: var(--radius); border: 1px solid var(--c-border); cursor: pointer; }
.case-gallery img.active { border-color: var(--c-primary); border-width: 3px; }

/* ---------- Contact ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info { }
.contact-info-item { display: flex; gap: 14px; margin-bottom: 20px; }
.contact-info-item .cii-icon { width: 44px; height: 44px; background: var(--c-primary-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--c-primary); flex-shrink: 0; }
.contact-info-item h4 { font-size: 15px; margin-bottom: 2px; }
.contact-info-item p { color: var(--c-text-light); font-size: 14px; }
.contact-map { margin-top: 20px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--c-border); }
.contact-map iframe { width: 100%; height: 300px; border: 0; display: block; }

/* ---------- Forms ---------- */
.form-card { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 28px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 14px; font-weight: 600; color: var(--c-text); }
.form-group label .req { color: #e74c3c; }
.form-control { width: 100%; padding: 10px 14px; border: 1px solid var(--c-border); border-radius: var(--radius); font-size: 15px; font-family: inherit; color: var(--c-text); transition: border-color .2s; background: #fff; }
.form-control:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px var(--c-primary-light); }
textarea.form-control { resize: vertical; min-height: 120px; }
select.form-control { cursor: pointer; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-error { color: #e74c3c; font-size: 13px; margin-top: 4px; }

/* ---------- Alerts ---------- */
.alert { padding: 12px 18px; border-radius: var(--radius); margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #E8F8EE; border: 1px solid #ABEBC6; color: #1E8449; }
.alert-error { background: #FDEBE9; border: 1px solid #F5B7B1; color: #C0392B; }

/* ---------- Pagination ---------- */
.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 32px; }
.pagination a { padding: 8px 14px; border: 1px solid var(--c-border); border-radius: var(--radius); color: var(--c-text); font-size: 14px; transition: all .2s; }
.pagination a:hover { border-color: var(--c-primary); color: var(--c-primary); }
.pagination a.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* ---------- About: factory ---------- */
.factory-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.factory-item { display: flex; gap: 16px; background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 24px; }
.factory-item__icon { width: 52px; height: 52px; background: var(--c-primary-light); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--c-primary); flex-shrink: 0; }
.factory-item h3 { font-size: 17px; margin-bottom: 6px; }
.factory-item p { color: var(--c-text-light); font-size: 14px; }

/* ---------- Qualifications ---------- */
.qual-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.qual-item { text-align: center; }
.qual-item img { width: 100%; aspect-ratio: 3/4; object-fit: contain; border: 1px solid var(--c-border); border-radius: var(--radius); background: #fff; }
.qual-item p { margin-top: 10px; font-size: 14px; }

/* ---------- Category filter ---------- */
.category-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 28px; }
.category-bar a { padding: 8px 20px; border: 1px solid var(--c-border); border-radius: 30px; font-size: 14px; color: var(--c-text); transition: all .2s; }
.category-bar a:hover { border-color: var(--c-primary); color: var(--c-primary); }
.category-bar a.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(3,1fr); }
  .qual-grid { grid-template-columns: repeat(3,1fr); }
}
@media (max-width: 900px) {
  .site-header { position: relative; }
  .header-phone { display: none; }
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0; background: #fff;
    flex-direction: column; gap: 0; padding: 0; border: none;
    box-shadow: none; max-height: 0; overflow: hidden; transition: max-height .3s;
  }
  .main-nav.open { max-height: 400px; padding: 10px 0; border-top: 1px solid var(--c-border); box-shadow: var(--shadow-hover); }
  .main-nav a { padding: 14px 24px; border-radius: 0; }
  .nav-toggle { display: flex; }
  .hero h1 { font-size: 28px; }
  .hero p { font-size: 16px; }
  .hero-inner { padding: 56px 20px; }
  .hero-slider { height: 280px; }
  .hero-slide { background-size: cover; background-position: center center; }
  .grid--3, .grid--2 { grid-template-columns: repeat(2,1fr); }
  .detail-layout { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .factory-grid { grid-template-columns: 1fr; }
  .qual-grid { grid-template-columns: repeat(2,1fr); }
  .section { padding: 40px 0; }
  .section-title { font-size: 23px; }
  .page-banner { padding: 36px 0; }
  .page-banner h1 { font-size: 24px; }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .grid--4, .grid--3, .grid--2 { grid-template-columns: 1fr; }
  .qual-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 23px; }
  .section { padding: 32px 0; }
  .hero-slider { height: 220px; }
  .hero-dots { bottom: 12px; }
  .hero-dot { width: 8px; height: 8px; margin: 0 4px; }
}