/* ============================================
   智身数据 · 官网样式
   深色科技风 / 结构化企业门户
   ============================================ */

:root {
  --bg-primary: #0a1628;
  --bg-secondary: #0f1d35;
  --bg-card: #14253d;
  --bg-elevated: #1a2e4a;
  --border-subtle: rgba(125, 175, 230, 0.12);
  --border-strong: rgba(125, 175, 230, 0.25);
  --text-primary: #e8eef5;
  --text-secondary: #a8bcd0;
  --text-muted: #6b8299;
  --accent-cyan: #00d4d4;
  --accent-blue: #1e88e5;
  --accent-gradient: linear-gradient(135deg, #00d4d4 0%, #1e88e5 100%);
  --accent-glow: rgba(0, 212, 212, 0.35);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --max-width: 1280px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  background-image:
    radial-gradient(circle at 20% 0%, rgba(30, 136, 229, 0.08), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(0, 212, 212, 0.06), transparent 40%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

/* ========== Layout ========== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
  position: relative;
}

.section-sm {
  padding: 64px 0;
}

.section-header {
  margin-bottom: 56px;
  max-width: 880px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 18px;
}

.eyebrow::before {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--accent-cyan);
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  padding: 4px 10px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
}

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(36px, 5vw, 56px);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(28px, 3.5vw, 42px);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(20px, 2vw, 26px);
}

h4 {
  font-size: 18px;
}

p {
  color: var(--text-secondary);
}

.text-muted {
  color: var(--text-muted);
}

.text-accent {
  color: var(--accent-cyan);
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========== Header ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all 0.3s ease;
}

.site-header.scrolled {
  background: rgba(10, 22, 40, 0.95);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  text-decoration: none;
}

.logo-mark {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border-radius: 6px;
  overflow: hidden;
  flex-shrink: 0;
}

.logo-mark img,
.logo-mark svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.logo-image {
  height: 38px;
  width: auto;
  display: block;
  background: #ffffff;
  border-radius: 6px;
  padding: 2px 6px;
  object-fit: contain;
}

.footer-brand .logo {
  font-size: 18px;
}

.footer-brand .logo-mark {
  width: 44px;
  height: 44px;
}

.nav-main {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-main a {
  font-size: 14px;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
}

.nav-main a:hover,
.nav-main a.active {
  color: var(--text-primary);
}

.nav-main a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-phone {
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-switch {
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}

.menu-toggle {
  display: none;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text-primary);
  position: relative;
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.5px;
  background: var(--text-primary);
}

.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #061226;
  font-weight: 600;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--accent-glow);
  color: #061226;
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.btn-ghost:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-arrow::after {
  content: "↗";
  font-size: 14px;
  transition: transform 0.2s ease;
}

.btn-arrow:hover::after {
  transform: translate(2px, -2px);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-cyan);
  font-size: 14px;
  font-weight: 500;
  transition: gap 0.2s ease;
}

.link-arrow::after {
  content: "→";
  transition: transform 0.2s ease;
}

.link-arrow:hover {
  gap: 10px;
}

/* ========== Hero ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + 48px);
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url("../images/hero-bg.png");
  background-size: cover;
  background-position: center;
  opacity: 0.35;
  filter: hue-rotate(190deg) saturate(1.2);
  z-index: -1;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 22, 40, 0.4) 0%, var(--bg-primary) 90%);
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(125, 175, 230, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125, 175, 230, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: -1;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
}

.hero-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.25em;
  color: var(--accent-cyan);
  padding: 6px 14px;
  border: 1px solid rgba(0, 212, 212, 0.3);
  border-radius: 999px;
  margin-bottom: 28px;
  background: rgba(0, 212, 212, 0.05);
}

.hero-title {
  font-size: clamp(40px, 5.5vw, 68px);
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: clamp(15px, 1.5vw, 18px);
  color: var(--text-secondary);
  max-width: 640px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero-meta {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-muted);
}

.hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero-meta-item strong {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-card {
  background: linear-gradient(145deg, rgba(20, 37, 61, 0.9), rgba(10, 22, 40, 0.6));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(10px);
  width: 100%;
  max-width: 420px;
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 212, 212, 0.1) 0%, transparent 40%);
  animation: rotate 12s linear infinite;
}

@keyframes rotate {
  to { transform: rotate(360deg); }
}

.hero-card-label {
  position: relative;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.hero-card-title {
  position: relative;
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
}

.hero-card-stats {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.hero-stat {
  background: rgba(10, 22, 40, 0.5);
  border: 1px solid var(--border-subtle);
  padding: 14px;
  border-radius: var(--radius-sm);
}

.hero-stat-num {
  font-size: 22px;
  font-weight: 600;
  color: var(--accent-cyan);
  display: block;
  margin-bottom: 4px;
}

.hero-stat-label {
  font-size: 12px;
  color: var(--text-muted);
}

/* ========== Trust strip ========== */
.trust-strip {
  padding: 32px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(15, 29, 53, 0.4);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.trust-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.trust-num {
  font-size: 32px;
  font-weight: 600;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.01em;
}

.trust-label {
  font-size: 13px;
  color: var(--text-muted);
}

/* ========== Section: Market ========== */
.market-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}

.market-text h3 {
  margin-bottom: 24px;
}

.market-text p {
  font-size: 16px;
  margin-bottom: 18px;
  line-height: 1.8;
}

.market-policy {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
}

.market-policy::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-gradient);
}

.market-policy h4 {
  margin-bottom: 20px;
  font-size: 16px;
  color: var(--accent-cyan);
}

.policy-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.policy-list li {
  font-size: 14px;
  color: var(--text-secondary);
  padding-left: 18px;
  position: relative;
  line-height: 1.6;
}

.policy-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--accent-cyan);
  border-radius: 50%;
}

.policy-list li strong {
  color: var(--text-primary);
  font-weight: 600;
}

.quote-card {
  background: linear-gradient(135deg, rgba(0, 212, 212, 0.08), rgba(30, 136, 229, 0.05));
  border: 1px solid rgba(0, 212, 212, 0.2);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 28px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.quote-card .quote-source {
  margin-top: 12px;
  font-size: 12px;
  color: var(--text-muted);
}

/* ========== Section: Product ========== */
.product-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 96px;
}

.product-feature:nth-child(even) {
  grid-template-columns: 1fr 1fr;
  direction: rtl;
}

.product-feature:nth-child(even) > * {
  direction: ltr;
}

.product-image-wrap {
  background: linear-gradient(135deg, var(--bg-card), var(--bg-secondary));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
}

.product-image-wrap::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -20%;
  width: 60%;
  height: 80%;
  background: radial-gradient(circle, rgba(0, 212, 212, 0.12), transparent 70%);
}

.product-image-wrap img {
  position: relative;
  width: 100%;
  border-radius: var(--radius-md);
}

.product-content .product-tag {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent-cyan);
  margin-bottom: 14px;
  text-transform: uppercase;
}

.product-content h3 {
  margin-bottom: 20px;
}

.product-content > p {
  margin-bottom: 28px;
  font-size: 15px;
  line-height: 1.8;
}

.product-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.product-feature-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all 0.3s ease;
}

.product-feature-item:hover {
  border-color: rgba(0, 212, 212, 0.4);
  transform: translateY(-2px);
}

.product-feature-item .icon-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0, 212, 212, 0.1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  color: var(--accent-cyan);
}

.product-feature-item h4 {
  font-size: 15px;
  margin-bottom: 6px;
}

.product-feature-item p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.product-specs {
  margin-top: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.product-specs table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.product-specs th,
.product-specs td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.product-specs th {
  background: var(--bg-secondary);
  color: var(--accent-cyan);
  font-weight: 500;
  letter-spacing: 0.06em;
  font-size: 12px;
  text-transform: uppercase;
}

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

.product-specs td:first-child {
  color: var(--text-muted);
  width: 40%;
}

/* ========== Methods ========== */
.methods-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.method-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.method-card:hover {
  border-color: rgba(0, 212, 212, 0.4);
  transform: translateY(-4px);
}

.method-num {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent-cyan);
  margin-bottom: 16px;
}

.method-card h4 {
  font-size: 18px;
  margin-bottom: 12px;
}

.method-card p {
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 16px;
}

.method-card .method-strength {
  font-size: 12px;
  color: var(--text-muted);
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}

.method-card .method-strength strong {
  display: block;
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: 4px;
  font-size: 13px;
}

.method-illustration {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 32px;
}

.method-illustration img {
  width: 100%;
  border-radius: var(--radius-md);
}

/* ========== Scenarios ========== */
.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.scenario-block {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
}

.scenario-block h4 {
  font-size: 18px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.scenario-block p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.scenario-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.scenario-tag {
  font-size: 12px;
  padding: 4px 10px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  background: rgba(10, 22, 40, 0.4);
}

.scenario-image {
  margin-top: 20px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.scenario-image img {
  width: 100%;
}

.scenario-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.scenario-list-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  transition: all 0.3s ease;
}

.scenario-list-item:hover {
  border-color: rgba(0, 212, 212, 0.4);
  transform: translateY(-4px);
}

.scenario-list-item .icon-circle {
  margin: 0 auto 14px;
}

.scenario-list-item h5 {
  font-size: 15px;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.scenario-list-item p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ========== Cooperation ========== */
.coop-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.coop-block {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
}

.coop-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent-gradient);
}

.coop-block h3 {
  font-size: 22px;
  margin-bottom: 16px;
}

.coop-block p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.revenue-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.revenue-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.revenue-item:hover {
  border-color: rgba(0, 212, 212, 0.4);
  transform: translateY(-2px);
}

.revenue-item .icon-circle {
  margin: 0 auto 16px;
}

.revenue-item h5 {
  font-size: 15px;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.revenue-item p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ========== FAQ ========== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 880px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.3s ease;
}

.faq-item.open {
  border-color: rgba(0, 212, 212, 0.4);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  text-align: left;
}

.faq-question .toggle {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0, 212, 212, 0.1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.open .toggle {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  padding: 0 24px;
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 24px 20px;
}

/* ========== Contact / CTA ========== */
.contact {
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

.contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(0, 212, 212, 0.08), transparent 50%);
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
  position: relative;
}

.contact-info h2 {
  margin-bottom: 18px;
}

.contact-info > p {
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 32px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-list-item {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 15px;
  color: var(--text-secondary);
}

.contact-list-item .icon-circle {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-field.full {
  grid-column: 1 / -1;
}

.form-field label {
  font-size: 13px;
  color: var(--text-secondary);
}

.form-field label .req {
  color: var(--accent-cyan);
}

.form-field input,
.form-field select,
.form-field textarea {
  padding: 12px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  transition: border-color 0.2s ease;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent-cyan);
}

.form-field textarea {
  resize: vertical;
  min-height: 96px;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 12px 0 20px;
}

.form-checkbox input {
  margin-top: 2px;
}

.form-submit {
  width: 100%;
  justify-content: center;
  padding: 14px 24px;
  font-size: 15px;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 56px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.7;
  margin: 16px 0;
  color: var(--text-muted);
}

.footer-contact-row {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.footer-col h5 {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

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

.footer-col a {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-col a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 18px;
}

/* ========== Section Index (large numbers) ========== */
.section-index {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 16px;
}

.section-index-num {
  font-size: clamp(48px, 7vw, 80px);
  font-weight: 600;
  line-height: 1;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-index-label {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* ========== Reveal animation ========== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero-inner,
  .market-grid,
  .product-feature,
  .contact-inner,
  .coop-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .product-feature:nth-child(even) {
    direction: ltr;
  }
  .scenario-grid {
    grid-template-columns: 1fr;
  }
  .scenario-list {
    grid-template-columns: repeat(2, 1fr);
  }
  .revenue-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }
  .section {
    padding: 64px 0;
  }
  .nav-main {
    display: none;
  }
  .header-phone {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .hero {
    min-height: auto;
    padding-top: calc(var(--header-height) + 40px);
    padding-bottom: 60px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    justify-content: center;
  }
  .methods-tabs,
  .scenario-list,
  .revenue-grid {
    grid-template-columns: 1fr;
  }
  .product-features {
    grid-template-columns: 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* Mobile nav drawer */
.mobile-drawer {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: 200;
  padding: 80px 24px 24px;
  transform: translateY(-100%);
  transition: transform 0.3s ease;
  display: none;
}

.mobile-drawer.open {
  transform: translateY(0);
}

.mobile-drawer a {
  display: block;
  padding: 16px 0;
  font-size: 18px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-subtle);
}

@media (max-width: 768px) {
  .mobile-drawer {
    display: block;
  }
}

/* Animations on load */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-tag, .hero-title, .hero-subtitle, .hero-actions, .hero-meta, .hero-card {
  animation: fadeUp 0.8s ease both;
}
.hero-tag { animation-delay: 0.1s; }
.hero-title { animation-delay: 0.2s; }
.hero-subtitle { animation-delay: 0.3s; }
.hero-actions { animation-delay: 0.4s; }
.hero-meta { animation-delay: 0.5s; }
.hero-card { animation-delay: 0.4s; }