/* 智机通 — 产品介绍站（PC 优先 · 工业物联配色） */
:root {
  --primary: #134E4A;
  --primary-light: #0F766E;
  --primary-deep: #0F172A;
  --accent: #D97706;
  --accent-hover: #B45309;
  --accent-soft: #22D3EE;
  --accent-iot: #0891B2;
  --bg: #F8FAFC;
  --bg-card: #ffffff;
  --bg-section: #F0FDFA;
  --text: #0F172A;
  --text-muted: #475569;
  --border: #CBD5E1;
  --success: #059669;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 4px 28px rgba(15, 118, 110, 0.1);
  --shadow-lg: 0 16px 56px rgba(19, 78, 74, 0.14);
  --nav-h: 76px;
  --max-w: 1280px;
  --content-pad: clamp(20px, 4vw, 48px);
  --section-y: clamp(64px, 8vw, 96px);
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  --iphone-max: 430px;
}

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

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

body {
  font-family: "Plus Jakarta Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

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

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color var(--transition);
}

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--content-pad);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary);
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent), var(--primary-light));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 800;
}

.nav-desktop {
  display: none;
  gap: 8px;
}

.nav-desktop a {
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  transition: background var(--transition), color var(--transition);
}

.nav-desktop a:hover,
.nav-desktop a.active {
  background: var(--bg);
  color: var(--primary);
}

.header-cta {
  display: none;
  padding: 10px 20px;
  background: var(--accent);
  color: #fff !important;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 8px;
  transition: background var(--transition);
}

.header-cta:hover {
  background: var(--accent-hover);
  color: #fff !important;
}

.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 8px;
}

.menu-toggle span {
  display: block;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 16px 20px 24px;
  box-shadow: var(--shadow-lg);
  flex-direction: column;
  gap: 4px;
}

.nav-mobile.open {
  display: flex;
}

.nav-mobile a {
  padding: 12px 16px;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
}

.nav-mobile a:hover {
  background: var(--bg);
}

.nav-mobile .mobile-cta {
  margin-top: 8px;
  text-align: center;
  background: var(--accent);
  color: #fff !important;
}

@media (min-width: 1024px) {
  .nav-desktop {
    display: flex;
    gap: 4px;
  }
  .nav-desktop a {
    padding: 8px 12px;
    font-size: 0.875rem;
  }
  .header-cta {
    display: inline-block;
  }
  .menu-toggle {
    display: none;
  }
}

/* Hero */
.hero {
  padding: calc(var(--nav-h) + 56px) 0 72px;
  background: linear-gradient(
    155deg,
    var(--primary-deep) 0%,
    #134E4A 30%,
    var(--primary-light) 58%,
    #14B8A6 82%,
    #5EEAD4 100%
  );
  color: #fff;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-grid {
  position: relative;
  display: grid;
  gap: 40px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(217, 119, 6, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #FEF3C7;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-lead {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  opacity: 0.92;
  max-width: 560px;
  margin-bottom: 12px;
}

.hero-value {
  font-size: 0.95rem;
  opacity: 0.85;
  max-width: 560px;
  margin-bottom: 16px;
  padding-left: 16px;
  border-left: 3px solid var(--accent);
}

.hero-citf-note {
  font-size: 0.9rem;
  line-height: 1.55;
  max-width: 560px;
  margin: 0 0 28px;
  padding: 12px 16px;
  background: rgba(217, 119, 6, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 10px;
  color: #FEF3C7;
}

.hero-citf-note strong {
  color: #fff;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(217, 119, 6, 0.32);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-color: #fff;
}

.hero-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

@media (min-width: 1024px) {
  .hero {
    padding: calc(var(--nav-h) + 88px) 0 100px;
    min-height: min(88vh, 820px);
    display: flex;
    align-items: center;
  }
  .hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 64px;
    align-items: center;
  }
  .hero h1 {
    font-size: 3rem;
    max-width: 14ch;
  }
  .hero-lead,
  .hero-value {
    max-width: 520px;
  }
  .hero-visual img {
    width: 100%;
    object-fit: cover;
    aspect-ratio: 16 / 9;
  }
}

@media (min-width: 1280px) {
  .hero h1 {
    font-size: 3.25rem;
  }
  .hero-grid {
    gap: 80px;
  }
}

/* Section common */
.section {
  padding: var(--section-y) 0;
}

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

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Highlights */
.highlights-grid {
  display: grid;
  gap: 20px;
}

.highlight-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.highlight-card:hover {
  box-shadow: var(--shadow);
  border-color: rgba(15, 118, 110, 0.35);
  transform: translateY(-2px);
}

.highlight-card .icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(15, 118, 110, 0.1), rgba(34, 211, 238, 0.12));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--primary);
}

.highlight-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}

.highlight-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

@media (min-width: 640px) {
  .highlights-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .highlights-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .section-header {
    margin-bottom: 56px;
  }
}

/* Flow */
.flow-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.flow-step {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  position: relative;
}

.flow-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 23px;
  top: 56px;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.flow-num {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent), var(--primary-light));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  z-index: 1;
}

.flow-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}

.flow-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.flow-image {
  margin-top: 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

@media (min-width: 768px) {
  .flow-steps {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 16px;
  }
  .flow-step {
    flex: 1 1 18%;
    flex-direction: column;
    text-align: center;
    padding: 0;
    min-width: 140px;
  }
  .flow-step:not(:last-child)::after {
    display: none;
  }
  .flow-num {
    margin: 0 auto 12px;
  }
}

@media (min-width: 1200px) {
  .flow-steps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    flex-wrap: nowrap;
  }
  .flow-step {
    flex: unset;
    min-width: 0;
    padding: 20px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
  }
  .flow-num {
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
  }
}

/* Pain table */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: var(--shadow);
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  min-width: 600px;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
}

tr:last-child td {
  border-bottom: none;
}

tr:nth-child(even) td {
  background: var(--bg-section);
}

td strong {
  color: var(--primary);
}

/* Features */
.features-grid {
  display: grid;
  gap: 16px;
}

.feature-module {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: grid;
  gap: 8px;
}

.feature-module h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.feature-module h3::before {
  content: "";
  width: 4px;
  height: 20px;
  background: var(--accent);
  border-radius: 2px;
}

.feature-module .cap {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.feature-module .benefit {
  font-size: 0.85rem;
  color: var(--success);
  font-weight: 600;
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Specs */
.specs-grid {
  display: grid;
  gap: 12px;
}

.spec-row {
  display: grid;
  gap: 8px;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.spec-row dt {
  font-weight: 700;
  color: var(--primary);
  font-size: 0.9rem;
}

.spec-row dd {
  color: var(--text-muted);
  font-size: 0.95rem;
}

@media (min-width: 768px) {
  .spec-row {
    grid-template-columns: 180px 1fr;
    gap: 24px;
    align-items: start;
  }
}

.boundary-box {
  margin-top: 32px;
  padding: 24px 28px;
  background: linear-gradient(135deg, #F0FDFA 0%, #ECFEFF 100%);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  font-size: 0.95rem;
  color: #134E4A;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.boundary-box strong {
  color: var(--primary);
}

/* Case study */
.case-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.case-header {
  padding: 32px 40px;
  background: linear-gradient(135deg, var(--primary-deep), var(--primary) 50%, var(--primary-light) 100%);
  color: #fff;
}

.case-header h3 {
  font-size: 1.35rem;
  margin-bottom: 12px;
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  font-size: 0.9rem;
  opacity: 0.9;
}

.case-body {
  padding: 32px;
}

.projects-table {
  margin-bottom: 32px;
}

.stats-grid {
  display: grid;
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}

.stat-card .num {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}

.stat-card .label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.results-cols {
  display: grid;
  gap: 24px;
}

.results-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent);
}

.results-col ul li {
  padding: 8px 0;
  padding-left: 20px;
  position: relative;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.results-col ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

@media (min-width: 640px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
  .results-cols {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }
  .case-body {
    padding: 40px 48px;
  }
  .table-wrap {
    border-radius: var(--radius-lg);
  }
  table {
    min-width: 0;
    font-size: 0.95rem;
  }
}

.case-image {
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 24px;
}

/* Compare */
.compare-grid {
  display: grid;
  gap: 16px;
}

.compare-item {
  padding: 20px;
  background: #fff;
  border-radius: var(--radius);
  border-left: 4px solid var(--accent);
}

.compare-item h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.compare-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Tech */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 32px;
}

.tech-tag {
  padding: 10px 18px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
}

.tech-list {
  max-width: 640px;
  margin: 0 auto;
}

.tech-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
  color: var(--text-muted);
}

.tech-list li strong {
  color: var(--primary);
}

/* Pricing */
.pricing-grid {
  display: grid;
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.pricing-grid--dual {
  max-width: 720px;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .pricing-grid--dual {
    grid-template-columns: repeat(2, 1fr);
  }
}

.price-card {
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.price-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow-lg);
}

.price-card h3 {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.price-card .price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
}

.price-card .price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
}

.price-card p {
  margin-top: 12px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Contact */
.contact-grid {
  display: grid;
  gap: 40px;
}

.demo-box {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.demo-box h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}

.demo-box a.demo-link {
  word-break: break-all;
  font-size: 0.9rem;
}

.demo-credentials {
  margin-top: 12px;
  padding: 12px;
  background: var(--bg);
  border-radius: 8px;
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
}

.contact-company .company-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-list li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 12px;
  align-items: baseline;
  font-size: 0.95rem;
}

.contact-label {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.contact-list a {
  color: var(--primary-light);
  font-weight: 600;
}

.contact-list a:hover {
  color: var(--accent);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 48px;
}

.btn-secondary {
  background: #fff;
  color: var(--primary);
  border: 2px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--primary-light);
  color: var(--primary);
  background: var(--bg);
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.qr-item {
  text-align: center;
}

.qr-item img {
  max-width: 180px;
  margin: 0 auto 12px;
  border-radius: var(--radius);
}

.qr-item p {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
}

@media (min-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: 48px;
    max-width: 960px;
    margin: 0 auto;
  }
  .qr-grid {
    gap: 32px;
  }
  .qr-item img {
    max-width: 200px;
  }
}

/* Footer */
.site-footer {
  padding: 48px 0 calc(40px + env(safe-area-inset-bottom));
  background: linear-gradient(160deg, var(--primary-deep), var(--primary));
  color: rgba(255, 255, 255, 0.85);
  text-align: center;
  font-size: 0.9rem;
}

.site-footer .logo-text {
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 8px;
}

.footer-company {
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}

.footer-contact {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 16px;
}

.footer-contact a {
  color: #99F6E4;
}

.footer-contact a:hover {
  color: #fff;
}

.footer-copy {
  margin-top: 16px;
  opacity: 0.7;
}

/* Roles */
.roles-grid {
  display: grid;
  gap: 16px;
  margin-bottom: 40px;
}

.role-card {
  background: #fff;
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.role-card h4 {
  color: var(--primary);
  font-size: 1rem;
  margin-bottom: 6px;
}

.role-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

@media (min-width: 640px) {
  .roles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .roles-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
  .features-grid {
    gap: 20px;
  }
  .compare-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .pricing-grid--dual {
    max-width: 840px;
    gap: 32px;
  }
  .price-card {
    padding: 44px 36px;
  }
}

.screenshot {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin-top: 40px;
  border: 1px solid var(--border);
}

.screenshot img {
  width: 100%;
  display: block;
}

.pricing-contact-note {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* —— iPhone 17 等窄屏（逻辑宽度约 393px，含安全区）—— */
@media (max-width: 430px) {
  :root {
    --nav-h: 64px;
    --content-pad: max(16px, env(safe-area-inset-left));
  }

  .site-header {
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
  }

  .nav-mobile {
    padding-bottom: calc(24px + env(safe-area-inset-bottom));
  }

  .hero {
    padding-top: calc(var(--nav-h) + 32px);
    padding-bottom: 48px;
  }

  .hero h1 {
    font-size: 1.65rem;
    line-height: 1.25;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .section-header h2 {
    font-size: 1.4rem;
  }

  .highlight-card,
  .feature-module,
  .role-card {
    padding: 20px;
  }

  .case-header,
  .case-body {
    padding: 20px;
  }

  .stat-card .num {
    font-size: 1.5rem;
  }

  .contact-actions {
    flex-direction: column;
  }

  .contact-actions .btn {
    width: 100%;
  }

  .table-wrap {
    margin-left: calc(-1 * var(--content-pad));
    margin-right: calc(-1 * var(--content-pad));
    border-radius: 0;
    border-left: none;
    border-right: none;
  }
}