:root {
  --primary: #0a2540;
  --primary-light: #123a5f;
  --accent: #00b4d8;
  --accent-deep: #0096c7;
  --accent-soft: #e0f7fd;
  --warm: #ff8c42;
  --text-dark: #1f2937;
  --text-gray: #5b6b7c;
  --bg-light: #f5f8fb;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 10px 40px rgba(10, 37, 64, 0.10);
  --shadow-hover: 0 18px 50px rgba(10, 37, 64, 0.18);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

.container { width: min(1200px, 92%); margin: 0 auto; }

a { color: var(--accent-deep); }

/* ============ 导航 ============ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(10, 37, 64, 0.08);
  transition: all 0.35s ease;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.logo-mark {
  width: 44px; height: 44px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent-deep) 100%);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 20px;
  letter-spacing: 1px;
  flex-shrink: 0;
}
.logo-text { line-height: 1.25; }
.logo-text .cn { font-size: 17px; font-weight: 700; color: var(--primary); display: block; }
.logo-text .en { font-size: 10.5px; color: var(--text-gray); letter-spacing: 0.4px; }

.nav-links { display: flex; gap: 30px; list-style: none; align-items: center; }
.nav-links a {
  text-decoration: none;
  color: var(--text-dark);
  font-size: 14.5px;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
  transition: color 0.25s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2.5px;
  border-radius: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}
.nav-links a:hover { color: var(--accent-deep); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--accent-deep); font-weight: 600; }
.nav-links a.active::after { width: 100%; }

.nav-cta {
  background: linear-gradient(135deg, var(--accent-deep), var(--accent));
  color: #fff !important;
  padding: 10px 24px !important;
  border-radius: 30px;
  font-weight: 600;
}
.nav-cta::after { display: none; }

/* 移动端菜单 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 42px; height: 42px;
  border-radius: 10px;
  position: relative;
  z-index: 1001;
}
.menu-toggle span {
  display: block;
  width: 22px; height: 2.5px;
  background: var(--primary);
  margin: 5px auto;
  border-radius: 2px;
  transition: all 0.3s;
}

/* ============ 内页 Hero 横幅 ============ */
.page-hero {
  margin-top: 74px;
  background:
    radial-gradient(ellipse 60% 50% at 85% 20%, rgba(0, 180, 216, 0.16), transparent),
    radial-gradient(ellipse 50% 60% at 10% 90%, rgba(255, 140, 66, 0.08), transparent),
    linear-gradient(160deg, #f7fafd 0%, #eef5fa 100%);
  padding: 70px 0 60px;
  border-bottom: 1px solid rgba(10, 37, 64, 0.05);
}
.page-hero .kicker {
  display: inline-block;
  color: var(--accent-deep);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.page-hero h1 {
  font-size: clamp(28px, 3.6vw, 42px);
  color: var(--primary);
  font-weight: 800;
  letter-spacing: -0.4px;
  margin-bottom: 14px;
}
.page-hero p { color: var(--text-gray); font-size: 16px; max-width: 760px; }

/* 面包屑 */
.breadcrumb {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-gray);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--accent-deep); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { opacity: 0.5; }

/* ============ 通用章节 ============ */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-light); }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head .kicker {
  display: inline-block;
  color: var(--accent-deep);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-head h2 {
  font-size: clamp(24px, 2.8vw, 32px);
  color: var(--primary);
  font-weight: 800;
  letter-spacing: -0.3px;
}
.section-head p { color: var(--text-gray); margin-top: 10px; font-size: 15px; }
.section-head.left { text-align: left; }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 34px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-deep), var(--accent));
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 150, 199, 0.35);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 32px rgba(0, 150, 199, 0.45); }
.btn-ghost {
  background: #fff;
  color: var(--primary);
  border: 1.5px solid rgba(10, 37, 64, 0.15);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-deep); transform: translateY(-3px); }
.btn-sm { padding: 9px 22px; font-size: 13.5px; }

/* ============ Hero（首页） ============ */
.hero {
  position: relative;
  margin-top: 74px;
  background:
    radial-gradient(ellipse 60% 50% at 85% 20%, rgba(0, 180, 216, 0.16), transparent),
    radial-gradient(ellipse 50% 60% at 10% 90%, rgba(255, 140, 66, 0.10), transparent),
    linear-gradient(160deg, #f7fafd 0%, #eef5fa 100%);
  padding: 96px 0 110px;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  border: 1px solid rgba(0, 150, 199, 0.25);
  font-size: 13.5px;
  font-weight: 600;
  padding: 7px 18px;
  border-radius: 30px;
  margin-bottom: 26px;
}
.hero-badge .dot {
  width: 8px; height: 8px;
  background: var(--accent-deep);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 150, 199, 0.4); }
  50% { box-shadow: 0 0 0 7px rgba(0, 150, 199, 0); }
}
.hero h1 {
  font-size: clamp(32px, 4.2vw, 52px);
  line-height: 1.22;
  color: var(--primary);
  font-weight: 800;
  margin-bottom: 22px;
  letter-spacing: -0.5px;
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent-deep) 20%, var(--accent) 60%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p.lead {
  font-size: 17px;
  color: var(--text-gray);
  max-width: 560px;
  margin-bottom: 38px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-visual { position: relative; }
.hero-card {
  background: var(--white);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 34px 32px;
  position: relative;
  z-index: 2;
}
.hero-card h3 {
  color: var(--primary);
  font-size: 17px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-card h3::before {
  content: "";
  width: 4px; height: 18px;
  border-radius: 2px;
  background: linear-gradient(var(--accent-deep), var(--accent));
}
.stat-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.stat-item {
  background: linear-gradient(150deg, #f6fafd, #eef5fa);
  border-radius: 12px;
  padding: 18px 16px;
  border: 1px solid rgba(10, 37, 64, 0.05);
}
.stat-item .num {
  font-size: 26px;
  font-weight: 800;
  color: var(--accent-deep);
  font-family: Georgia, serif;
}
.stat-item .num small { font-size: 14px; font-weight: 600; }
.stat-item .lbl { font-size: 12.5px; color: var(--text-gray); margin-top: 3px; }
.hero-float {
  position: absolute;
  background: var(--primary);
  color: #fff;
  border-radius: 14px;
  padding: 16px 22px;
  box-shadow: var(--shadow-hover);
  z-index: 3;
  animation: float 4.5s ease-in-out infinite;
}
.hero-float .t { font-size: 13px; opacity: 0.85; }
.hero-float .v { font-size: 19px; font-weight: 700; color: #7ce3f7; }
.f1 { top: -26px; right: -14px; }
.f2 { bottom: -26px; left: -20px; animation-delay: 1.6s; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ============ 品牌卡片 ============ */
.brand-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.brand-card {
  position: relative;
  border-radius: var(--radius);
  padding: 40px 38px;
  overflow: hidden;
  color: #fff;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
  text-decoration: none;
}
.brand-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.brand-teijin { background: linear-gradient(120deg, #0a2540 0%, #123a5f 55%, #1d5a8a 100%); }
.brand-unitika { background: linear-gradient(120deg, #005f73 0%, #0096c7 60%, #00b4d8 100%); }
.brand-card::before {
  content: "";
  position: absolute;
  top: -70px; right: -70px;
  width: 240px; height: 240px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.07);
}
.brand-card::after {
  content: "";
  position: absolute;
  top: -30px; right: 30px;
  width: 120px; height: 120px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}
.brand-card .tag {
  position: absolute;
  top: 26px; left: 38px;
  font-size: 12px;
  letter-spacing: 1.5px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 5px 14px;
  border-radius: 20px;
  backdrop-filter: blur(4px);
}
.brand-card .name { font-size: 30px; font-weight: 800; letter-spacing: 0.5px; }
.brand-card .jp { font-size: 14px; opacity: 0.8; margin: 2px 0 10px; }
.brand-card .desc { font-size: 14.5px; opacity: 0.92; max-width: 440px; }
.brand-card .more { margin-top: 16px; font-size: 13.5px; font-weight: 600; color: #7ce3f7; }

/* ============ 产品卡片 ============ */
.product-tabs {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}
.tab-btn {
  padding: 12px 30px;
  border-radius: 30px;
  border: 1.5px solid rgba(10, 37, 64, 0.14);
  background: #fff;
  color: var(--text-dark);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}
.tab-btn:hover { border-color: var(--accent); color: var(--accent-deep); }
.tab-btn.active {
  background: linear-gradient(135deg, var(--accent-deep), var(--accent));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 8px 20px rgba(0, 150, 199, 0.3);
}
.tab-panel { display: none; animation: fadeUp 0.5s ease; }
.tab-panel.show { display: block; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}
.brand-intro {
  display: flex;
  gap: 26px;
  background: #fff;
  border-radius: var(--radius);
  padding: 30px 34px;
  box-shadow: var(--shadow);
  margin-bottom: 34px;
  align-items: flex-start;
}
.brand-intro .icon {
  flex-shrink: 0;
  width: 62px; height: 62px;
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
  font-weight: 800;
  color: #fff;
}
.icon.teijin { background: linear-gradient(135deg, #0a2540, #1d5a8a); }
.icon.unitika { background: linear-gradient(135deg, #0096c7, #00b4d8); }
.brand-intro h3 { color: var(--primary); font-size: 21px; margin-bottom: 8px; }
.brand-intro p { color: var(--text-gray); font-size: 14.5px; }

.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-grid.two-col { grid-template-columns: repeat(2, 1fr); }
.product-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.35s ease;
  display: flex;
  flex-direction: column;
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-hover); }
.product-head {
  padding: 22px 26px 18px;
  border-bottom: 1px dashed rgba(10, 37, 64, 0.12);
  position: relative;
}
.product-head .cat {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent-deep);
  background: var(--accent-soft);
  display: inline-block;
  padding: 4px 12px;
  border-radius: 16px;
  margin-bottom: 10px;
}
.product-head h3 { color: var(--primary); font-size: 18.5px; font-weight: 700; }
.product-head h3 span { font-size: 13px; color: var(--text-gray); font-weight: 500; margin-left: 6px; }
.product-body { padding: 18px 26px 8px; flex: 1; }
.spec-list { list-style: none; }
.spec-list li {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 13.5px;
  padding: 7px 0;
  border-bottom: 1px solid #f0f4f8;
}
.spec-list li:last-child { border-bottom: none; }
.spec-list .k { color: var(--text-gray); flex-shrink: 0; }
.spec-list .v { color: var(--primary); font-weight: 600; text-align: right; }
.product-foot {
  padding: 14px 26px 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.use-tag {
  font-size: 12px;
  color: var(--accent-deep);
  background: rgba(0, 150, 199, 0.08);
  border: 1px solid rgba(0, 150, 199, 0.18);
  padding: 4px 12px;
  border-radius: 14px;
}

/* ============ 应用卡片 ============ */
.app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.app-card {
  position: relative;
  border-radius: var(--radius);
  padding: 30px 26px;
  background: linear-gradient(160deg, #f8fbfd, #eef4f9);
  border: 1px solid rgba(10, 37, 64, 0.06);
  overflow: hidden;
  transition: all 0.35s ease;
  text-decoration: none;
  display: block;
}
.app-card:hover {
  background: linear-gradient(150deg, var(--primary), #15507e);
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.app-card:hover .app-icon { background: rgba(255, 255, 255, 0.14); }
.app-card:hover h3, .app-card:hover p { color: #fff; }
.app-icon {
  width: 54px; height: 54px;
  border-radius: 14px;
  background: var(--accent-soft);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
  transition: all 0.35s ease;
}
.app-icon svg { width: 28px; height: 28px; stroke: var(--accent-deep); fill: none; stroke-width: 1.8; }
.app-card:hover .app-icon svg { stroke: #7ce3f7; }
.app-card h3 { color: var(--primary); font-size: 17px; font-weight: 700; margin-bottom: 8px; transition: color 0.3s; }
.app-card p { font-size: 13.5px; color: var(--text-gray); transition: color 0.3s; }

/* ============ 优势（深色） ============ */
.advantages { padding: 80px 0; background: linear-gradient(160deg, #0a2540 0%, #0f3155 60%, #124066 100%); position: relative; overflow: hidden; }
.advantages::before {
  content: "";
  position: absolute;
  top: -160px; right: -160px;
  width: 480px; height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 180, 216, 0.18), transparent 70%);
}
.advantages .section-head h2 { color: #fff; }
.advantages .section-head p { color: rgba(255, 255, 255, 0.65); }
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; z-index: 2; }
.adv-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  padding: 32px 26px;
  backdrop-filter: blur(8px);
  transition: all 0.35s ease;
}
.adv-card:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-6px); border-color: rgba(0, 180, 216, 0.45); }
.adv-num {
  font-family: Georgia, serif;
  font-size: 42px;
  font-weight: 800;
  background: linear-gradient(120deg, #7ce3f7, #00b4d8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 16px;
}
.adv-card h3 { color: #fff; font-size: 17.5px; font-weight: 700; margin-bottom: 10px; }
.adv-card p { font-size: 13.5px; color: rgba(255, 255, 255, 0.72); }

/* ============ 关于 / 信息 ============ */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-text .kicker {
  color: var(--accent-deep);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  display: block;
  margin-bottom: 12px;
}
.about-text h2 { font-size: clamp(24px, 3vw, 32px); color: var(--primary); font-weight: 800; margin-bottom: 20px; }
.about-text p { color: var(--text-gray); font-size: 15px; margin-bottom: 16px; }
.about-points { list-style: none; margin-top: 24px; }
.about-points li { display: flex; gap: 12px; align-items: flex-start; padding: 10px 0; font-size: 15px; color: var(--text-dark); }
.about-points .ck {
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-deep);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px;
  font-weight: 800;
  margin-top: 3px;
}
.about-info {
  background: linear-gradient(160deg, #f7fafd, #eef5fa);
  border: 1px solid rgba(10, 37, 64, 0.07);
  border-radius: 18px;
  padding: 38px 36px;
}
.info-row { display: flex; gap: 16px; padding: 15px 0; border-bottom: 1px dashed rgba(10, 37, 64, 0.12); }
.info-row:last-child { border-bottom: none; }
.info-row .ik {
  flex-shrink: 0;
  width: 42px; height: 42px;
  border-radius: 11px;
  background: #fff;
  box-shadow: 0 4px 12px rgba(10, 37, 64, 0.08);
  display: flex; align-items: center; justify-content: center;
}
.info-row .ik svg { width: 20px; height: 20px; stroke: var(--accent-deep); fill: none; stroke-width: 1.8; }
.info-row .il { font-size: 12.5px; color: var(--text-gray); }
.info-row .iv { font-size: 15px; color: var(--primary); font-weight: 600; }

/* ============ FAQ ============ */
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid rgba(10, 37, 64, 0.08);
  border-radius: 12px;
  margin-bottom: 14px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(10, 37, 64, 0.05);
}
.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 26px;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  font-family: inherit;
}
.faq-q .arrow {
  flex-shrink: 0;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-deep);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px;
  transition: transform 0.3s;
}
.faq-item.open .faq-q .arrow { transform: rotate(180deg); }
.faq-a { display: none; padding: 0 26px 22px; color: var(--text-gray); font-size: 14.5px; }
.faq-item.open .faq-a { display: block; }

/* ============ 联系我们 ============ */
.contact-wrap { display: flex; justify-content: center; }
.contact-form-card {
  background: #fff;
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 40px 38px;
}
.contact-form-card h3 { color: var(--primary); font-size: 22px; margin-bottom: 8px; }
.contact-form-card > p { color: var(--text-gray); font-size: 14px; margin-bottom: 26px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-item { display: flex; flex-direction: column; gap: 7px; }
.form-item.full { grid-column: 1 / -1; }
.form-item label { font-size: 13.5px; font-weight: 600; color: var(--primary); }
.form-item input, .form-item select, .form-item textarea {
  border: 1.5px solid rgba(10, 37, 64, 0.13);
  border-radius: 10px;
  padding: 12px 15px;
  font-size: 14.5px;
  font-family: inherit;
  outline: none;
  transition: all 0.25s;
  background: #fbfdfe;
}
.form-item input:focus, .form-item select:focus, .form-item textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(0, 180, 216, 0.12);
  background: #fff;
}
.form-item textarea { resize: vertical; min-height: 96px; }
.submit-btn {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--accent-deep), var(--accent));
  color: #fff;
  border: none;
  border-radius: 32px;
  padding: 15px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 8px 22px rgba(0, 150, 199, 0.35);
  font-family: inherit;
}
.submit-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0, 150, 199, 0.45); }
.contact-side { display: flex; flex-direction: column; gap: 22px; width: 100%; max-width: 720px; }
.contact-info-card {
  background: linear-gradient(150deg, var(--primary), #15507e);
  border-radius: 18px;
  padding: 36px 34px;
  color: #fff;
  flex: 1;
}
.contact-info-card h3 { font-size: 21px; margin-bottom: 24px; display: flex; align-items: center; gap: 10px; }
.contact-line { display: flex; gap: 14px; padding: 13px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.12); align-items: flex-start; }
.contact-line:last-child { border-bottom: none; }
.contact-line .ci-icon {
  flex-shrink: 0;
  width: 38px; height: 38px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.1);
  display: flex; align-items: center; justify-content: center;
}
.contact-line .ci-icon svg { width: 18px; height: 18px; stroke: #7ce3f7; fill: none; stroke-width: 1.8; }
.contact-line .cl { font-size: 12px; opacity: 0.65; }
.contact-line .cv { font-size: 14.5px; font-weight: 600; }
.quote-card {
  background: linear-gradient(135deg, #ff9a5a, var(--warm));
  border-radius: 18px;
  padding: 28px 30px;
  color: #fff;
}
.quote-card h4 { font-size: 18px; margin-bottom: 8px; }
.quote-card p { font-size: 13.5px; opacity: 0.92; }

/* ============ 页脚 ============ */
.footer {
  background: #071b30;
  color: rgba(255, 255, 255, 0.7);
  padding: 56px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer h5 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.footer p { font-size: 13.5px; line-height: 1.9; }
.footer ul { list-style: none; }
.footer ul li { padding: 5px 0; font-size: 13.5px; }
.footer ul a { color: rgba(255, 255, 255, 0.7); text-decoration: none; transition: color 0.25s; }
.footer ul a:hover { color: #7ce3f7; }
.footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-logo .logo-mark { background: linear-gradient(135deg, #15507e, var(--accent-deep)); }
.footer-logo .cn { color: #fff; font-weight: 700; font-size: 16px; display: block; }
.footer-logo .en { font-size: 10px; color: rgba(255, 255, 255, 0.5); }
.copyright { text-align: center; padding-top: 24px; font-size: 12.5px; color: rgba(255, 255, 255, 0.4); }

/* ============ 滚动动画 ============ */
.reveal { opacity: 0; transform: translateY(36px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ============ 响应式 ============ */
@media (max-width: 992px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 74px; left: 0; right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    gap: 0;
    padding: 10px 6%;
    box-shadow: 0 12px 30px rgba(10, 37, 64, 0.12);
    align-items: stretch;
  }
  .nav-links.open { display: flex; }
  .nav-links li { border-bottom: 1px solid #f0f4f8; }
  .nav-links a { display: block; padding: 14px 0; }
  .nav-links a::after { display: none; }
  .nav-links a.nav-cta { text-align: center; margin: 12px 0; }
  .menu-toggle { display: block; }
  .hero-grid { grid-template-columns: 1fr; gap: 50px; }
  .brand-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid.two-col { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .product-grid { grid-template-columns: 1fr; }
  .product-grid.two-col { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .brand-intro { flex-direction: column; }
  .hero { padding: 60px 0 80px; }
  .hero-float { display: none; }
  .page-hero { padding: 50px 0 44px; }
  .section { padding: 56px 0; }
}