:root {
  --blue: #1e3a8a;
  --blue-dark: #102a63;
  --orange: #f97316;
  --green: #10b981;
  --ink: #111827;
  --muted: #5f6b7a;
  --line: #e5e7eb;
  --soft: #f6f8fb;
  --white: #ffffff;
  --shadow: 0 18px 45px rgba(17, 24, 39, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  background: var(--white);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 6vw;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(229, 231, 235, 0.85);
  backdrop-filter: blur(12px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 190px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--white);
  font-weight: 800;
  background: var(--blue);
  border-radius: 8px;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.25;
}

.brand small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  color: #374151;
  font-size: 15px;
}

.main-nav a:hover,
.nav-phone:hover {
  color: var(--orange);
}

.nav-phone {
  color: var(--blue);
  font-weight: 800;
  white-space: nowrap;
}

.hero {
  position: relative;
  min-height: calc(100vh - 72px);
  display: grid;
  align-items: center;
  overflow: hidden;
  background: var(--blue-dark);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(12, 30, 70, 0.9) 0%, rgba(16, 42, 99, 0.76) 43%, rgba(16, 42, 99, 0.22) 100%),
    url("assets/hero-suzhou-construction.png") center / cover no-repeat;
  transform: scale(1.02);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(760px, 88vw);
  margin-left: 6vw;
  padding: 72px 0 104px;
  color: var(--white);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--orange);
  font-weight: 800;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 18px;
  font-size: clamp(42px, 7vw, 72px);
  line-height: 1.12;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.25;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.35;
}

.hero-subtitle {
  margin-bottom: 26px;
  color: #e5edf9;
  font-size: clamp(19px, 2.4vw, 26px);
}

.trust-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.trust-tags span {
  padding: 8px 12px;
  color: #edf7ff;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
}

.trust-tags span::before {
  content: "✓ ";
  color: #86efac;
  font-weight: 800;
}

.hero-actions,
.contact-methods {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 12px 22px;
  border: 0;
  border-radius: 8px;
  font-weight: 800;
  cursor: pointer;
}

.btn-primary {
  color: var(--white);
  background: var(--orange);
  box-shadow: 0 12px 28px rgba(249, 115, 22, 0.3);
}

.btn-primary:hover {
  background: #ea580c;
}

.btn-secondary {
  color: var(--white);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.32);
}

.hero-note {
  max-width: 660px;
  margin-top: 28px;
  color: #d9e5f7;
}

.section {
  padding: 88px 6vw;
}

.section-head {
  width: min(860px, 100%);
  margin-bottom: 34px;
}

.section-head p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

.intro-band {
  padding-top: 28px;
  padding-bottom: 28px;
  background: var(--soft);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stats div {
  padding: 22px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.stats strong {
  display: block;
  color: var(--blue);
  font-size: 34px;
  line-height: 1.2;
}

.stats span {
  color: var(--muted);
}

.service-grid,
.advantage-grid,
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.card {
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(17, 24, 39, 0.06);
}

.service-card {
  min-height: 360px;
}

.icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 22px;
  color: var(--blue);
  background: #eaf1ff;
  border-radius: 8px;
}

.icon svg {
  width: 30px;
  height: 30px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.service-card p,
.advantage-item p,
.area-copy p,
.about-section p {
  color: var(--muted);
}

.service-card a {
  display: inline-block;
  margin-top: 12px;
  color: var(--blue);
  font-weight: 800;
}

.advantage-section,
.faq-section {
  background: var(--soft);
}

.advantage-grid {
  grid-template-columns: repeat(4, 1fr);
}

.advantage-item {
  padding: 26px;
  background: var(--white);
  border-left: 4px solid var(--green);
  border-radius: 8px;
}

.advantage-item span {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--orange);
  font-size: 14px;
  font-weight: 900;
}

.process-section {
  background: #ffffff;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  padding: 0;
  margin: 0;
  list-style: none;
  counter-reset: step;
}

.timeline li {
  position: relative;
  min-height: 180px;
  padding: 28px 22px;
  border-top: 4px solid var(--blue);
  background: var(--soft);
}

.timeline li + li {
  border-left: 1px solid var(--line);
}

.timeline li::before {
  counter-increment: step;
  content: counter(step);
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-bottom: 18px;
  color: var(--white);
  font-weight: 900;
  background: var(--blue);
  border-radius: 50%;
}

.timeline strong,
.timeline span {
  display: block;
}

.timeline span {
  color: var(--muted);
}

.area-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) 1fr;
  gap: 40px;
  align-items: center;
}

.area-map {
  position: relative;
  min-height: 420px;
  border-radius: 8px;
  background:
    radial-gradient(circle at 50% 48%, rgba(30, 58, 138, 0.2), transparent 36%),
    linear-gradient(145deg, #e9f0ff, #f8fafc 62%, #ecfdf5);
  border: 1px solid var(--line);
  overflow: hidden;
}

.area-map::before,
.area-map::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(30, 58, 138, 0.14);
  border-radius: 50%;
}

.area-map::before {
  inset: 58px;
}

.area-map::after {
  inset: 116px;
}

.area {
  position: absolute;
  display: grid;
  place-items: center;
  min-width: 62px;
  height: 34px;
  padding: 0 12px;
  color: var(--white);
  font-weight: 800;
  background: var(--blue);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.a1 { top: 45%; left: 45%; }
.a2 { top: 34%; left: 58%; background: var(--orange); }
.a3 { top: 30%; left: 28%; }
.a4 { top: 56%; left: 36%; background: var(--green); }
.a5 { top: 20%; left: 44%; }
.a6 { top: 66%; left: 58%; }
.a7 { top: 36%; right: 8%; background: var(--green); }
.a8 { top: 18%; right: 12%; }

.region-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.region-tags span {
  padding: 8px 12px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.testimonial-section {
  background: #162a56;
  color: var(--white);
}

.testimonial-section .section-head p:not(.eyebrow) {
  color: #dbe7fb;
}

blockquote {
  margin: 0;
  padding: 28px;
  color: #edf5ff;
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
}

cite {
  display: block;
  margin-top: 18px;
  color: #9ed5ff;
  font-style: normal;
}

.faq-list {
  display: grid;
  gap: 14px;
}

details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

summary {
  padding: 20px 24px;
  font-size: 18px;
  font-weight: 800;
  cursor: pointer;
}

details p {
  margin: 0;
  padding: 0 24px 22px;
  color: var(--muted);
}

.about-section {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 38px;
  align-items: center;
}

.about-panel {
  padding: 30px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.about-panel strong {
  display: block;
  margin-bottom: 14px;
  color: var(--blue);
  font-size: 22px;
}

.about-panel ul {
  padding-left: 20px;
  margin: 0;
}

.final-cta {
  display: grid;
  grid-template-columns: 1fr minmax(320px, 460px);
  gap: 42px;
  align-items: start;
  padding: 92px 6vw;
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(16, 42, 99, 0.96), rgba(30, 58, 138, 0.92)),
    url("assets/hero-suzhou-construction.png") center / cover no-repeat;
}

.contact-copy p:not(.eyebrow) {
  color: #dbe7fb;
}

.contact-methods a,
.contact-methods button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  padding: 10px 16px;
  color: var(--white);
  font: inherit;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  cursor: pointer;
}

.consult-form {
  display: grid;
  gap: 14px;
  padding: 28px;
  color: var(--ink);
  background: var(--white);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

label {
  display: grid;
  gap: 6px;
  color: #374151;
  font-weight: 800;
}

input,
select {
  width: 100%;
  min-height: 48px;
  padding: 10px 12px;
  color: var(--ink);
  font: inherit;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.floating-contact {
  position: fixed;
  right: 18px;
  top: 50%;
  z-index: 30;
  display: grid;
  gap: 10px;
  width: 164px;
  transform: translateY(-50%);
}

.floating-contact a,
.floating-contact button,
.qr-box {
  padding: 12px;
  text-align: center;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.floating-contact button {
  width: 100%;
  color: var(--ink);
  font: inherit;
  cursor: pointer;
}

.floating-contact span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
}

.floating-contact strong {
  display: block;
  color: var(--blue);
  line-height: 1.35;
}

.qr-box img {
  width: 118px;
  margin: 0 auto 8px;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 40;
  padding: 10px 14px;
  color: var(--white);
  background: rgba(17, 24, 39, 0.92);
  border-radius: 8px;
  opacity: 0;
  transform: translateY(12px);
  transition: 0.2s ease;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 6vw;
  color: #6b7280;
  background: #0f172a;
}

footer p {
  margin: 0;
}

@media (max-width: 1040px) {
  .main-nav {
    display: none;
  }

  .stats,
  .advantage-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .service-grid,
  .testimonial-grid {
    grid-template-columns: 1fr;
  }

  .timeline {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .timeline li {
    min-height: 0;
    border-left: 4px solid var(--blue);
    border-top: 0;
  }

  .timeline li + li {
    border-left: 4px solid var(--blue);
  }

  .area-layout,
  .about-section,
  .final-cta {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  body {
    padding-bottom: 84px;
  }

  .site-header {
    min-height: 66px;
    padding: 0 18px;
  }

  .brand {
    min-width: 0;
  }

  .brand small,
  .nav-phone {
    display: none;
  }

  .hero {
    min-height: 720px;
  }

  .hero-bg {
    background:
      linear-gradient(180deg, rgba(12, 30, 70, 0.93) 0%, rgba(16, 42, 99, 0.85) 52%, rgba(16, 42, 99, 0.38) 100%),
      url("assets/hero-suzhou-construction.png") center / cover no-repeat;
  }

  .hero-content {
    width: auto;
    margin: 0;
    padding: 56px 18px 92px;
  }

  h1 {
    font-size: 42px;
  }

  .section,
  .final-cta {
    padding: 64px 18px;
  }

  .stats,
  .advantage-grid {
    grid-template-columns: 1fr;
  }

  .area-map {
    min-height: 360px;
  }

  .floating-contact {
    left: 0;
    right: 0;
    top: auto;
    bottom: 0;
    width: 100%;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding: 8px;
    background: rgba(255, 255, 255, 0.95);
    border-top: 1px solid var(--line);
    transform: none;
    backdrop-filter: blur(12px);
  }

  .floating-contact a,
  .floating-contact button {
    border-radius: 8px;
    box-shadow: none;
  }

  .qr-box {
    display: none;
  }

  footer {
    display: block;
    padding: 24px 18px;
  }
}

/* 二维码点击光标 */
.qr-box img {
  cursor: zoom-in;
  transition: transform 0.2s;
}
 
.qr-box img:hover {
  transform: scale(1.05);
}
 
/* 模态框样式 */
.qr-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
 
.qr-modal.active {
  display: flex;
}
 
.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(4px);
  cursor: zoom-out;
}
 
.modal-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  animation: modalIn 0.3s ease-out;
}
 
.modal-content img {
  display: block;
  max-width: 100%;
  max-height: 80vh;
  width: auto;
  height: auto;
  border-radius: 8px;
}
 
.modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  width: 36px;
  height: 36px;
  border: none;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
 
.modal-close:hover {
  background: white;
  transform: scale(1.1);
}
 
.modal-hint {
  text-align: center;
  color: #666;
  font-size: 14px;
  margin: 12px 0 0;
  user-select: none;
}
 
@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}
 
/* 防止背景滚动 */
body.modal-open {
  overflow: hidden;
}
 
/* 移动端适配 */
@media (max-width: 640px) {
  .modal-content {
    padding: 12px;
    max-width: 95vw;
  }
  
  .modal-close {
    top: -36px;
    width: 32px;
    height: 32px;
    font-size: 20px;
  }
}
/* 模态框默认隐藏 */
.qr-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
 
/* 激活状态显示 */
.qr-modal.active {
  display: flex;
}
 
.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.7);
  cursor: pointer;
}
 
.modal-content {
  position: relative;
  background: #fff;
  padding: 20px;
  border-radius: 12px;
  max-width: 90vw;
  max-height: 90vh;
  z-index: 1001;
  text-align: center;
}
 
.modal-content img {
  max-width: 300px;
  width: 100%;
  height: auto;
  display: block;
}
 
.modal-close {
  position: absolute;
  top: -10px;
  right: -10px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: #333;
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  line-height: 32px;
  padding: 0;
}
 
.modal-hint {
  margin-top: 10px;
  color: #666;
  font-size: 14px;
}