/* ============================================================
   西门子家电类福州市维修服务 - 全局样式
   设计系统：西门子极简白 · 信任感 · 移动端优先
   ============================================================ */

/* ---- CSS Variables ---- */
:root {
  /* 西门子青绿 — 信任主色 */
  --color-primary: #009FB7;
  --color-primary-dark: #007A8E;
  --color-primary-light: #00B4CC;
  --color-primary-bg: #E5F5F8;

  /* 强调色 — CTA */
  --color-accent: #E65100;
  --color-accent-dark: #BF4400;

  /* 中性色 */
  --color-bg: #F8F9FA;
  --color-white: #FFFFFF;
  --color-border: #E0E3E6;
  --color-border-light: #EDEFF1;
  --color-text: #1A1A1A;
  --color-text-secondary: #5C5F62;
  --color-text-muted: #94979A;

  /* 间距 */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 5rem;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  /* 阴影 */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);

  /* 字体 */
  --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", -apple-system, BlinkMacSystemFont, sans-serif;

  /* 布局 */
  --container-max: 1140px;
  --header-height: 72px;
}

/* ---- Reset ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 110px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-primary-dark); }
ul, ol { list-style: none; }

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* ---- Header ---- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-xs);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.header-logo:hover { color: var(--color-primary); }

.header-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.9rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* ---- Navigation ---- */
.nav { display: flex; align-items: center; gap: var(--space-2xl); }

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: var(--space-xs) 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ---- Header Phone ---- */
.header-phones { display: flex; align-items: center; gap: var(--space-lg); }

.header-phone {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

.header-phone:hover { color: var(--color-primary); }
.header-phone-icon { color: var(--color-primary); }

/* ---- Mobile Menu ---- */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  margin: 4px 0;
  transition: transform 0.3s, opacity 0.3s;
  border-radius: 1px;
}

.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(4px,4px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(4px,-4px); }

/* ---- Brand Disclaimer ---- */
.brand-disclaimer {
  background: var(--color-primary-bg);
  border-bottom: 1px solid rgba(0,159,183,0.15);
  padding: 6px 0;
  text-align: center;
  font-size: 0.78rem;
  color: var(--color-primary-dark);
  margin-top: var(--header-height);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  background: linear-gradient(170deg, #003D47 0%, #005F6B 30%, #008A9B 100%);
  color: #FFFFFF;
  padding: calc(var(--header-height) + var(--space-3xl)) 0 var(--space-3xl);
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 70%, rgba(0,159,183,0.2) 0%, transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(255,255,255,0.04) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.hero h1 {
  font-size: clamp(1.6rem, 5vw, 2.6rem);
  font-weight: 700;
  margin-bottom: var(--space-md);
  letter-spacing: 0.03em;
  line-height: 1.3;
}

.hero h1 .accent {
  display: block;
  font-size: clamp(0.8rem, 2vw, 0.9rem);
  font-weight: 500;
  letter-spacing: 0.12em;
  opacity: 0.7;
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
}

.hero p {
  font-size: 1.05rem;
  opacity: 0.85;
  margin-bottom: var(--space-xl);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.hero-image {
  max-width: 700px;
  margin: 0 auto var(--space-xl);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,0.3);
  border: 3px solid rgba(255,255,255,0.15);
}

.hero-image img,
.hero-image video {
  width: 100%;
  display: block;
}

.hero-phones {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}

.hero-phone-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.1rem;
  font-weight: 600;
}

.hero-phone-item .label {
  font-size: 0.7rem;
  font-weight: 400;
  opacity: 0.6;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 2rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--color-primary);
  color: #FFFFFF;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,159,183,0.3);
}

.btn-outline {
  background: transparent;
  color: #FFFFFF;
  border: 1.5px solid rgba(255,255,255,0.4);
}

.btn-outline:hover {
  border-color: #FFFFFF;
  color: #FFFFFF;
  background: rgba(255,255,255,0.08);
}

.btn-lg {
  padding: 0.9rem 2.5rem;
  font-size: 1.05rem;
}

.btn-phone {
  background: var(--color-accent);
  color: #FFFFFF;
  font-size: 1.1rem;
  padding: 0.9rem 2.5rem;
  border-radius: 50px;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(230,81,0,0.3);
}

.btn-phone:hover {
  background: var(--color-accent-dark);
  color: #FFFFFF;
  box-shadow: 0 6px 28px rgba(230,81,0,0.4);
  transform: translateY(-2px);
}

/* ---- Sections ---- */
.section {
  padding: var(--space-4xl) 0;
}

.section-white {
  background: var(--color-white);
}

.section-bg {
  background: var(--color-bg);
}

.section-label {
  text-align: center;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3xl);
  font-size: 0.95rem;
}

.section-divider {
  width: 50px;
  height: 3px;
  background: var(--color-primary);
  margin: 0 auto var(--space-2xl);
  border-radius: 2px;
}

/* ---- Trust Badges ---- */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.trust-card {
  background: var(--color-white);
  padding: var(--space-2xl) var(--space-lg);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: transform 0.25s, box-shadow 0.25s;
}

.trust-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.trust-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-md);
  background: var(--color-primary-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.trust-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--color-primary);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.trust-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.trust-card p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ---- Service Cards ---- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  max-width: 900px;
  margin: 0 auto;
}

.service-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  overflow: hidden;
  transition: all 0.25s;
  text-decoration: none;
  color: var(--color-text);
  display: block;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  color: var(--color-text);
}

.service-card-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
}

.service-card-body {
  padding: var(--space-lg);
}

.service-card h3 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.service-card.featured {
  border: 2px solid var(--color-primary);
}

.service-card.featured .service-card-badge {
  display: inline-block;
  background: var(--color-primary);
  color: white;
  font-size: 0.7rem;
  padding: 2px 10px;
  border-radius: 20px;
  margin-bottom: var(--space-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
}

/* ---- Why Us ---- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.why-card {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: box-shadow 0.25s;
}

.why-card:hover {
  box-shadow: var(--shadow-md);
}

.why-card-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary);
}

.why-card-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-primary);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.why-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.why-card p {
  font-size: 0.87rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ---- Flow Steps ---- */
.flow-steps {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 0;
  flex-wrap: wrap;
}

.flow-step {
  text-align: center;
  flex: 1;
  min-width: 140px;
  max-width: 200px;
}

.flow-step-num {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-md);
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
}

.flow-step h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.flow-step p {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
}

.flow-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 1.4rem;
  padding: 0 var(--space-sm);
  margin-top: 12px;
  flex-shrink: 0;
}

/* ---- Video Showcase ---- */
.video-showcase {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-light);
}

.video-showcase video {
  width: 100%;
  display: block;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

/* ---- Image Gallery ---- */
.image-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.image-gallery img {
  width: 100%;
  display: block;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  transition: transform 0.25s;
  box-shadow: var(--shadow-xs);
}

.image-gallery img:hover {
  transform: scale(1.03);
}

.image-gallery-2col {
  grid-template-columns: repeat(2, 1fr);
}

/* ---- CTA Section ---- */
.cta-section {
  background: linear-gradient(170deg, #003D47, #005F6B);
  color: #FFFFFF;
  text-align: center;
  padding: var(--space-4xl) 0;
}

.cta-section h2 {
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.cta-section p {
  opacity: 0.85;
  margin-bottom: var(--space-xl);
  font-size: 1rem;
}

.cta-phones {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}

.cta-phone-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.1rem;
  font-weight: 600;
}

.cta-phone-item .label {
  font-size: 0.7rem;
  font-weight: 400;
  opacity: 0.6;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
}

/* ---- Footer ---- */
.footer {
  background: #1C2B33;
  color: rgba(255,255,255,0.7);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-2xl);
}

.footer h3 {
  color: #FFFFFF;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.footer p, .footer li {
  font-size: 0.85rem;
  line-height: 2.2;
}

.footer a {
  color: rgba(255,255,255,0.7);
  transition: color 0.2s;
}

.footer a:hover { color: var(--color-primary-light); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: var(--space-xl);
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

.footer-disclaimer {
  margin-top: var(--space-sm);
  font-size: 0.72rem;
  color: rgba(255,255,255,0.2);
}

/* ---- Page Header ---- */
.page-header {
  background: linear-gradient(170deg, #003D47, #005F6B);
  color: #FFFFFF;
  padding: calc(var(--header-height) + var(--space-3xl)) 0 var(--space-3xl);
  text-align: center;
}

.page-header h1 {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.03em;
}

.page-header p {
  opacity: 0.8;
  font-size: 0.95rem;
  max-width: 480px;
  margin: 0 auto;
}

/* ---- Breadcrumb ---- */
.breadcrumb {
  padding: var(--space-md) 0;
  font-size: 0.84rem;
  color: var(--color-text-muted);
}

.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb span { margin: 0 var(--space-xs); color: var(--color-text-muted); }

/* ---- Service Detail Cards ---- */
.service-detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-lg);
}

.service-detail-card {
  background: var(--color-white);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  border-top: 3px solid var(--color-primary);
  transition: box-shadow 0.25s;
}

.service-detail-card:hover {
  box-shadow: var(--shadow-md);
}

.service-detail-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--color-primary-dark);
}

.service-detail-card ul { list-style: disc; padding-left: 1.25rem; }
.service-detail-card li {
  font-size: 0.87rem;
  margin-bottom: var(--space-xs);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ---- Price Table ---- */
.price-table {
  width: 100%;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  border-collapse: collapse;
}

.price-table th {
  background: var(--color-primary);
  color: white;
  padding: var(--space-md) var(--space-xl);
  text-align: left;
  font-weight: 600;
  font-size: 0.9rem;
}

.price-table td {
  padding: var(--space-md) var(--space-xl);
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.87rem;
  color: var(--color-text-secondary);
}

.price-table tr:last-child td { border-bottom: none; }
.price-table .price {
  color: var(--color-accent);
  font-weight: 700;
  white-space: nowrap;
}

/* ---- Promise Cards ---- */
.promise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
}

.promise-card {
  background: var(--color-white);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: box-shadow 0.25s;
}

.promise-card:hover { box-shadow: var(--shadow-md); }

.promise-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-md);
  background: var(--color-primary-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.promise-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--color-primary);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---- Service Card Icon ---- */
.service-card-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto var(--space-md);
  background: var(--color-primary-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.service-card-icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--color-primary);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.promise-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.promise-card p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* ---- Article List ---- */
.article-list { display: grid; gap: var(--space-xl); }

.article-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: transform 0.25s, box-shadow 0.25s;
}

.article-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.article-card-body { padding: var(--space-2xl); }

.article-card-date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.article-card h2 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  line-height: 1.5;
}

.article-card h2 a { color: var(--color-text); }
.article-card h2 a:hover { color: var(--color-primary); }

.article-card > .article-card-body > p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.article-card-tags {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  padding: 3px 12px;
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  font-size: 0.75rem;
  border-radius: 20px;
  font-weight: 500;
}

/* ---- Article Content ---- */
.article-content {
  max-width: 800px;
  margin: 0 auto;
}

.article-content h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: var(--space-2xl) 0 var(--space-md);
  color: var(--color-primary-dark);
}

.article-content h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: var(--space-xl) 0 var(--space-sm);
  color: var(--color-text);
}

.article-content p {
  margin-bottom: var(--space-md);
  line-height: 1.85;
  font-size: 0.93rem;
  color: var(--color-text-secondary);
}

.article-content ul, .article-content ol {
  margin-bottom: var(--space-md);
  padding-left: 1.5rem;
}

.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li {
  margin-bottom: var(--space-xs);
  line-height: 1.7;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.article-content .highlight-box {
  background: var(--color-primary-bg);
  border-left: 3px solid var(--color-primary);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.9rem;
  color: var(--color-primary-dark);
}

/* ---- Back to top ---- */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(16px);
  transition: all 0.3s;
  pointer-events: none;
  z-index: 50;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-3px);
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  :root { --header-height: 60px; }

  .menu-toggle { display: block; }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0; right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--space-xl);
    gap: var(--space-lg);
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--color-border-light);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s;
  }

  .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }

  .header-phones { gap: var(--space-md); }
  .header-phone { font-size: 0.8rem; }

  /* Hero */
  .hero {
    padding: calc(var(--header-height) + var(--space-2xl)) 0 var(--space-2xl);
  }
  .hero h1 { font-size: 1.5rem; }
  .hero p { font-size: 0.9rem; }
  .hero-image { max-width: 100%; border-radius: var(--radius-md); }
  .hero-phones { flex-direction: column; align-items: center; gap: var(--space-sm); }

  .trust-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
  .service-grid { grid-template-columns: 1fr; max-width: 380px; margin: 0 auto; }
  .video-grid { grid-template-columns: 1fr; }
  .image-gallery { grid-template-columns: repeat(2, 1fr); }

  .flow-steps { flex-direction: column; align-items: center; gap: var(--space-md); }
  .flow-arrow { transform: rotate(90deg); }
  .flow-step { max-width: none; }

  .footer-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .section { padding: var(--space-3xl) 0; }

  .why-grid { grid-template-columns: 1fr; }
  .service-detail-grid { grid-template-columns: 1fr; }

  .cta-phones { flex-direction: column; align-items: center; gap: var(--space-sm); }
  .cta-section { padding: var(--space-3xl) 0; }
  .cta-section h2 { font-size: 1.3rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-md); }

  .hero {
    padding: calc(var(--header-height) + var(--space-xl)) 0 var(--space-xl);
  }
  .hero h1 { font-size: 1.3rem; }
  .hero p { font-size: 0.85rem; }
  .hero-image { border-radius: var(--radius-sm); border-width: 2px; }

  .trust-grid { grid-template-columns: 1fr 1fr; gap: var(--space-sm); }
  .trust-card { padding: var(--space-md); }
  .trust-card h3 { font-size: 0.9rem; }
  .trust-card p { font-size: 0.78rem; }

  .service-detail-grid { grid-template-columns: 1fr; }
  .image-gallery { grid-template-columns: 1fr 1fr; gap: var(--space-sm); }
  .image-gallery img { border-radius: var(--radius-sm); }

  .back-to-top { bottom: var(--space-md); right: var(--space-md); }

  .section { padding: var(--space-2xl) 0; }
  .section-title { font-size: 1.25rem; }
  .section-subtitle { font-size: 0.85rem; margin-bottom: var(--space-xl); }

  .btn-lg { padding: 0.75rem 1.5rem; font-size: 0.95rem; }
  .btn-phone { padding: 0.75rem 1.8rem; font-size: 1rem; }

  .page-header { padding: calc(var(--header-height) + var(--space-2xl)) 0 var(--space-2xl); }
  .page-header h1 { font-size: 1.4rem; }

  .flow-steps { gap: var(--space-sm); }
  .flow-step-num { width: 40px; height: 40px; font-size: 1rem; }
  .flow-step h3 { font-size: 0.85rem; }
  .flow-step p { font-size: 0.75rem; }

  .why-card { padding: var(--space-md); gap: var(--space-md); }
  .why-card h3 { font-size: 0.9rem; }
  .why-card p { font-size: 0.8rem; }

  .promise-card { padding: var(--space-md); }
  .promise-card h3 { font-size: 0.9rem; }
  .promise-card p { font-size: 0.8rem; }

  .video-showcase { border-radius: var(--radius-sm); }
  .video-showcase video { max-height: 50vh; object-fit: contain; background: #000; }

  .price-table th, .price-table td { padding: var(--space-sm); font-size: 0.78rem; }
}

/* ---- Utility ---- */
.text-center { text-align: center; }
.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mt-3 { margin-top: var(--space-2xl); }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }
.mb-3 { margin-bottom: var(--space-2xl); }