/* ===== CSS Variables ===== */
:root {
  --blue-primary: #1a6eb5;
  --blue-dark: #0a3d6b;
  --blue-deeper: #072e52;
  --blue-accent: #00aaff;
  --blue-light: #e8f2fc;
  --blue-mid: #2a82d0;
  --white: #ffffff;
  --bg-light: #f5f8ff;
  --text-dark: #1a2332;
  --text-body: #333333;
  --text-muted: #666666;
  --text-light: #999999;
  --border: #e0e8f0;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 32px rgba(26, 110, 181, 0.18);
  --radius: 8px;
  --radius-lg: 16px;
  --transition: all 0.3s ease;
  --font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  color: var(--text-body);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

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

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

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 48px;
  max-width: 600px;
}

.section-header {
  margin-bottom: 48px;
}

.label-en {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--blue-primary);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}

.tag-badge {
  display: inline-block;
  background: var(--blue-light);
  color: var(--blue-primary);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 4px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--blue-primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--blue-mid);
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.7);
}

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

.btn-outline-blue {
  background: transparent;
  color: var(--blue-primary);
  border: 2px solid var(--blue-primary);
}

.btn-outline-blue:hover {
  background: var(--blue-primary);
  color: var(--white);
}

/* ===== Scroll Animation ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Navigation ===== */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 61, 107, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: var(--transition);
}

#navbar.scrolled {
  background: rgba(7, 46, 82, 0.98);
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-logo img {
  height: 36px;
  width: auto;
  border-radius: 4px;
}

.nav-logo-text {
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.3;
  display: flex;
  flex-direction: column;
}

.nav-logo-text span:first-child {
  font-size: 1rem;
}

.nav-logo-text span:last-child {
  font-size: 0.72rem;
  opacity: 0.8;
  font-weight: 400;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  color: rgba(255,255,255,0.85);
  font-size: 0.88rem;
  padding: 6px 12px;
  border-radius: 4px;
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
  background: rgba(255,255,255,0.12);
}

.nav-cta {
  background: var(--blue-accent) !important;
  color: var(--white) !important;
  font-weight: 600 !important;
  border-radius: 4px !important;
}

.nav-cta:hover {
  background: #00bbff !important;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-mobile {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--blue-deeper);
  padding: 16px 24px 24px;
  z-index: 999;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

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

.nav-mobile a {
  display: block;
  color: rgba(255,255,255,0.85);
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  font-size: 0.95rem;
}

.nav-mobile a:last-child {
  border-bottom: none;
}

/* ===== Hero ===== */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../media/product.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(7, 46, 82, 0.88) 0%,
    rgba(10, 61, 107, 0.75) 60%,
    rgba(26, 110, 181, 0.5) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 120px 0 80px;
  max-width: 760px;
}

.hero-tag {
  display: inline-block;
  background: rgba(0, 170, 255, 0.2);
  border: 1px solid rgba(0, 170, 255, 0.5);
  color: #7dd8ff;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.hero-title em {
  font-style: normal;
  color: var(--blue-accent);
}

.hero-tagline {
  font-size: 1.25rem;
  color: rgba(255,255,255,0.9);
  font-weight: 500;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.hero-desc {
  font-size: 1rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 40px;
  line-height: 1.7;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 680px;
}

.hero-stat-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  backdrop-filter: blur(8px);
}

.hero-stat-value {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
  margin-bottom: 6px;
}

.hero-stat-value span {
  font-size: 1.2rem;
  font-weight: 600;
}

.hero-stat-unit {
  font-size: 0.8rem;
  color: var(--blue-accent);
  font-weight: 600;
  margin-bottom: 4px;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.3;
}

/* ===== Video Section ===== */
#video {
  background: var(--blue-deeper);
  padding: 80px 0;
}

#video .section-title {
  color: var(--white);
}

#video .section-subtitle {
  color: rgba(255,255,255,0.65);
}

.video-wrapper {
  position: relative;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  border: 1px solid rgba(255,255,255,0.1);
}

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

/* ===== Core Advantages ===== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-primary), var(--blue-accent));
  opacity: 0;
  transition: var(--transition);
}

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

.advantage-card:hover::before {
  opacity: 1;
}

.advantage-num {
  font-size: 3rem;
  font-weight: 800;
  color: var(--blue-light);
  line-height: 1;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}

.advantage-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  display: block;
}

.advantage-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}

.advantage-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.advantage-tag {
  display: inline-block;
  background: var(--blue-light);
  color: var(--blue-primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  margin-top: 12px;
}

/* ===== Capabilities ===== */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.capability-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
  cursor: default;
}

.capability-card:hover {
  border-color: var(--blue-primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.capability-icon {
  font-size: 2.4rem;
  margin-bottom: 14px;
  display: block;
}

.capability-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
  line-height: 1.4;
}

.capability-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ===== Specs Table ===== */
.specs-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.specs-table thead {
  background: var(--blue-primary);
  color: var(--white);
}

.specs-table thead th {
  padding: 14px 20px;
  text-align: left;
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.05em;
}

.specs-table tbody tr:nth-child(even) {
  background: var(--bg-light);
}

.specs-table tbody tr:hover {
  background: var(--blue-light);
}

.specs-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text-body);
  line-height: 1.5;
}

.specs-table td:first-child {
  font-weight: 600;
  color: var(--blue-dark);
  width: 30%;
  white-space: nowrap;
}

.specs-table tbody tr:last-child td {
  border-bottom: none;
}

/* ===== System Components ===== */
.components-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.component-col {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.component-col-header {
  background: var(--blue-primary);
  color: var(--white);
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.component-col-header .icon {
  font-size: 1.3rem;
}

.component-list {
  padding: 8px 0;
}

.component-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
}

.component-item:last-child {
  border-bottom: none;
}

.component-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue-accent);
  flex-shrink: 0;
  margin-top: 7px;
}

.component-text {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.5;
}

/* ===== Performance Comparison ===== */
.perf-stat-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}

.perf-stat-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
}

.perf-stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--blue-accent);
  line-height: 1;
  margin-bottom: 6px;
}

.perf-stat-value sub {
  font-size: 1rem;
  vertical-align: baseline;
}

.perf-stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.4;
}

.comparison-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.15);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.comparison-table thead {
  background: rgba(255,255,255,0.08);
}

.comparison-table thead th {
  padding: 14px 20px;
  text-align: left;
  font-weight: 700;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.9);
  border-bottom: 1px solid rgba(255,255,255,0.15);
}

.comparison-table thead th.col-ours {
  background: rgba(0, 170, 255, 0.15);
  color: var(--blue-accent);
}

.comparison-table tbody tr {
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background 0.2s;
}

.comparison-table tbody tr:hover {
  background: rgba(255,255,255,0.04);
}

.comparison-table td {
  padding: 14px 20px;
  color: rgba(255,255,255,0.75);
  vertical-align: middle;
}

.comparison-table td:first-child {
  color: rgba(255,255,255,0.9);
  font-weight: 600;
  white-space: nowrap;
}

.comparison-table td.col-ours {
  background: rgba(0, 170, 255, 0.08);
  color: var(--white);
  font-weight: 600;
}

.cell-best {
  color: #4ade80 !important;
  font-weight: 700 !important;
}

.cell-good {
  color: #fbbf24 !important;
}

.cell-poor {
  color: rgba(255,255,255,0.4) !important;
}

.badge-best {
  display: inline-block;
  background: rgba(74, 222, 128, 0.15);
  border: 1px solid rgba(74, 222, 128, 0.4);
  color: #4ade80;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
  margin-left: 8px;
  vertical-align: middle;
}

/* ===== Reports Section ===== */
.reports-intro {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.report-highlight-card {
  background: linear-gradient(135deg, var(--blue-primary), var(--blue-dark));
  color: var(--white);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.report-highlight-val {
  font-size: 3rem;
  font-weight: 800;
  color: var(--blue-accent);
  line-height: 1;
  white-space: nowrap;
}

.report-highlight-val sup {
  font-size: 1.2rem;
}

.report-highlight-text h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.report-highlight-text p {
  font-size: 0.85rem;
  opacity: 0.8;
  line-height: 1.5;
}

/* ── Report comparison: row-based equal-height layout ── */

.rc-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-bottom: 8px;
}

/* Column header row */
.rc-header-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.rc-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px 22px;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.rc-header-kalibr {
  background: #f1f5f9;
  color: #475569;
  border-right: 1px solid var(--border);
}

.rc-header-hongli {
  background: var(--blue-light);
  color: var(--blue-dark);
}

.rc-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #94a3b8;
  flex-shrink: 0;
}

.rc-dot-hongli {
  background: var(--blue-primary);
}

/* Section label spanning full width */
.rc-row-label {
  background: var(--blue-deeper);
  padding: 10px 22px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.88);
  text-transform: uppercase;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* Content row: 4 children auto-flow into 2 rows × 2 cols
   Row 1 = images (equal height), Row 2 = tables (equal height, aligned start) */
.rc-content-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.rc-cell {
  display: flex;
  flex-direction: column;
}

.rc-cell-img {
  padding: 22px 22px 14px;
  border-top: 1px solid var(--border);
}

.rc-cell-tbl {
  padding: 14px 22px 26px;
  border-top: 1px solid rgba(26, 110, 181, 0.12);
  justify-content: flex-start;
}

.rc-cell-kalibr {
  background: var(--white);
  border-right: 1px solid var(--border);
}

.rc-cell-hongli {
  background: #fafcff;
}

/* Screenshot image */
.rc-img {
  width: 100%;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  object-fit: contain;
}

/* Data table (reused) */
.report-data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.83rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.report-data-table th {
  background: var(--blue-dark);
  color: var(--white);
  padding: 9px 13px;
  text-align: left;
  font-weight: 600;
  font-size: 0.78rem;
}

.report-data-table th:first-child,
.report-data-table td:first-child {
  width: 52%;
  word-break: break-word;
}

.report-data-table td {
  padding: 8px 13px;
  border-bottom: 1px solid var(--border);
  color: var(--text-body);
  line-height: 1.45;
}

.report-data-table tr:last-child td {
  border-bottom: none;
}

.report-data-table tr:nth-child(even) td {
  background: var(--bg-light);
}

.data-val-good {
  color: #15803d;
  font-weight: 700;
}

.data-val-bad {
  color: #b45309;
}

/* ===== Application Scenarios ===== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.scenario-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.scenario-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
  border-color: var(--blue-primary);
}

.scenario-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.scenario-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 6px;
  line-height: 1.4;
}

.scenario-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ===== Calibration Process ===== */
.process-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.process-flow::before {
  content: '';
  position: absolute;
  top: 32px;
  left: calc(12.5% + 16px);
  right: calc(12.5% + 16px);
  height: 2px;
  background: linear-gradient(90deg, var(--blue-primary), var(--blue-accent));
}

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 8px;
  position: relative;
}

.process-num {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--blue-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--blue-primary);
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
  transition: var(--transition);
}

.process-step:hover .process-num {
  background: var(--blue-primary);
  color: var(--white);
  transform: scale(1.1);
}

.process-icon {
  font-size: 1.6rem;
  display: block;
  margin-bottom: 8px;
}

.process-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dark);
  line-height: 1.35;
}

.process-sub {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.4;
}

.process-row-2 {
  margin-top: 48px;
}

/* ===== Custom Services ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  background: var(--white);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.service-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: var(--blue-primary);
}

.service-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  background: var(--blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 20px;
}

.service-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}

.service-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.service-list {
  margin-top: 14px;
}

.service-list li {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 4px 0;
  padding-left: 16px;
  position: relative;
}

.service-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--blue-primary);
  font-weight: 700;
}

/* ===== Contact ===== */
#contact {
  background: var(--bg-light);
}

.contact-layout {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 48px;
  align-items: start;
}

/* Left column */
.contact-company-header {
  margin-bottom: 28px;
}

.contact-company-header h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.contact-company-en {
  font-size: 0.85rem;
  color: var(--text-light);
}

.contact-cards {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: var(--transition);
}

.contact-card:hover {
  border-color: var(--blue-primary);
  box-shadow: 0 4px 14px rgba(26,110,181,0.1);
}

.contact-card-icon {
  width: 46px;
  height: 46px;
  background: var(--blue-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-card-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--blue-primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 5px;
}

.contact-card-value {
  font-size: 0.95rem;
  color: var(--text-dark);
  line-height: 1.75;
}

.contact-card-value a {
  color: var(--text-dark);
  font-weight: 500;
  transition: color 0.2s;
}

.contact-card-value a:hover {
  color: var(--blue-primary);
}

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

/* Right column: QR codes */
.contact-right {
  position: sticky;
  top: 88px;
}

.contact-qr-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow);
}

.contact-qr-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--blue-light);
}

.contact-qr-img {
  width: 100%;
  max-width: 260px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: block;
  margin: 0 auto;
}

.contact-qr-labels {
  display: flex;
  justify-content: space-around;
  margin-top: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* ===== Footer ===== */
footer {
  background: var(--blue-deeper);
  color: rgba(255,255,255,0.7);
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 24px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-logo img {
  height: 32px;
  width: auto;
  border-radius: 4px;
}

.footer-logo-name {
  color: var(--white);
  font-size: 1rem;
  font-weight: 700;
}

.footer-tagline {
  font-size: 0.85rem;
  line-height: 1.6;
  max-width: 280px;
}

.footer-nav h4 {
  color: var(--white);
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: 0.05em;
}

.footer-nav ul li {
  margin-bottom: 8px;
}

.footer-nav ul li a {
  font-size: 0.85rem;
  transition: color 0.2s;
}

.footer-nav ul li a:hover {
  color: var(--blue-accent);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-icp {
  opacity: 0.5;
}

/* ===== Scroll to Top ===== */
#scroll-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--blue-primary);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  z-index: 500;
  box-shadow: 0 4px 16px rgba(26,110,181,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}

#scroll-top.visible {
  opacity: 1;
  pointer-events: all;
}

#scroll-top:hover {
  background: var(--blue-mid);
  transform: translateY(-2px);
}

/* ===== Divider ===== */
.section-divider {
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-primary), var(--blue-accent));
  border-radius: 2px;
  margin: 12px 0 24px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .perf-stat-cards {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }

  .section-title { font-size: 1.6rem; }

  .hero-title { font-size: 2rem; }

  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }

  .hero-stat-value { font-size: 1.6rem; }

  .nav-links { display: none; }

  .nav-hamburger { display: flex; }

  .advantages-grid { grid-template-columns: 1fr; }

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

  .components-grid { grid-template-columns: 1fr; }

  .perf-stat-cards { grid-template-columns: repeat(2, 1fr); }

  .reports-intro { grid-template-columns: 1fr; }

  /* Report comparison: stack vertically on mobile */
  .rc-header-row,
  .rc-content-row {
    grid-template-columns: 1fr;
  }

  .rc-header-kalibr {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .rc-cell-kalibr {
    border-right: none;
  }

  /* Mobile reading order: kalibr image → kalibr table → hongli image → hongli table */
  .rc-cell-img.rc-cell-kalibr  { order: 1; }
  .rc-cell-tbl.rc-cell-kalibr  { order: 2; border-bottom: 2px solid var(--border); }
  .rc-cell-img.rc-cell-hongli  { order: 3; }
  .rc-cell-tbl.rc-cell-hongli  { order: 4; }

  .rc-header-row .rc-header-hongli {
    border-top: none;
  }

  .scenarios-grid { grid-template-columns: 1fr; }

  .services-grid { grid-template-columns: 1fr; }

  .contact-layout { grid-template-columns: 1fr; gap: 28px; }

  .contact-right { position: static; }

  .contact-qr-img { max-width: 220px; }

  .footer-grid { grid-template-columns: 1fr; gap: 28px; }

  .footer-bottom { flex-direction: column; text-align: center; }

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

  .process-flow::before { display: none; }

  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.7rem; }

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

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

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

  .capabilities-grid { grid-template-columns: 1fr; }

  .perf-stat-cards { grid-template-columns: 1fr; }

  .process-flow { grid-template-columns: 1fr; }

  .comparison-table { font-size: 0.78rem; }

  .comparison-table th,
  .comparison-table td { padding: 10px 12px; }
}