/* ============================================================
   倔驴云手机 · 企业官网 — Apple 黑白极简风格
============================================================ */

/* --- CSS Variables --- */
:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f5f5f7;
  --color-bg-dark: #000000;
  --color-bg-footer: #1d1d1f;
  --color-text: #1d1d1f;
  --color-text-body: #333333;
  --color-text-secondary: #86868b;
  --color-text-inverse: #ffffff;
  --color-border: #d2d2d7;
  --color-border-light: #e5e5ea;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --fs-h1: 3.5rem;       /* 56px */
  --fs-h2: 2.5rem;       /* 40px */
  --fs-h3: 1.75rem;      /* 28px */
  --fs-h4: 1.3rem;       /* 21px */
  --fs-body: 1.0625rem;  /* 17px */
  --fs-caption: 0.875rem;/* 14px */
  --fs-small: 0.8125rem; /* 13px */

  --lh-heading: 1.15;
  --lh-body: 1.5;
  --lh-caption: 1.4;

  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;

  --radius-sm: 8px;
  --radius-md: 12px;

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 40px;
  --spacing-3xl: 48px;
  --spacing-4xl: 56px;
  --spacing-5xl: 64px;
  --spacing-6xl: 80px;
  --spacing-7xl: 96px;
  --spacing-8xl: 120px;
  --spacing-9xl: 160px;

  --nav-height: 64px;
  --max-width: 1200px;

  --ease-out: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-in-out: cubic-bezier(0.42, 0, 0.58, 1);
  --transition-fast: 0.2s var(--ease-out);
  --transition-base: 0.3s var(--ease-out);
  --transition-slow: 0.5s var(--ease-out);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  color: var(--color-text-body);
  background: var(--color-bg);
}

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

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

a:hover {
  color: var(--color-text-secondary);
}

ul {
  list-style: none;
}

/* --- Utility --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-8xl) var(--spacing-lg);
}

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

.section-label {
  font-size: var(--fs-caption);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-md);
}

.section-title {
  font-size: var(--fs-h2);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  line-height: var(--lh-heading);
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: var(--fs-h4);
  font-weight: var(--fw-regular);
  color: var(--color-text-secondary);
  max-width: 600px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: var(--fw-medium);
  font-family: var(--font-family);
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
}

.btn-primary:hover {
  background: #333;
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-text);
  transform: translateY(-1px);
}

.btn-light {
  background: var(--color-text-inverse);
  color: var(--color-bg-dark);
}

.btn-light:hover {
  background: #e8e8ed;
  transform: translateY(-1px);
}

/* --- Header / Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border-light);
  z-index: 100;
  display: flex;
  align-items: center;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: auto;
  height: 40px;
  font-size: var(--fs-h4);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  text-decoration: none;
  background: none;
}

.logo::before {
  content: "";
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  border-radius: 8px;
  background: url("logo.png") center / contain no-repeat;
}

.logo-icon {
  width: 32px;
  height: 32px;
  display: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-link {
  font-size: var(--fs-caption);
  font-weight: var(--fw-regular);
  color: var(--color-text-body);
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
}

.nav-cta {
  margin-left: var(--spacing-md);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: var(--spacing-xs);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition-base);
  border-radius: 1px;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Hero --- */
.hero {
  padding-top: calc(var(--nav-height) + var(--spacing-8xl));
  padding-bottom: var(--spacing-8xl);
  text-align: center;
  background: var(--color-bg);
}

.hero-combined {
  text-align: left;
  background:
    radial-gradient(circle at 12% 18%, rgba(0, 122, 255, 0.08), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, #f5f5f7 100%);
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(520px, 1.25fr);
  gap: var(--spacing-5xl);
  align-items: center;
}

.hero-copy {
  max-width: 560px;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--color-border-light);
  border-radius: 999px;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.76);
}

.hero-title {
  font-size: var(--fs-h1);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  line-height: var(--lh-heading);
  max-width: 800px;
  margin: 0 auto var(--spacing-lg);
  letter-spacing: 0;
}

.hero-copy .hero-title,
.hero-copy .hero-subtitle {
  margin-left: 0;
  margin-right: 0;
}

.hero-subtitle {
  font-size: var(--fs-h4);
  font-weight: var(--fw-regular);
  color: var(--color-text-secondary);
  max-width: 500px;
  margin: 0 auto var(--spacing-2xl);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-6xl);
}

.hero-copy .hero-actions {
  justify-content: flex-start;
  margin-bottom: var(--spacing-3xl);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-md);
}

.hero-metrics div {
  padding: var(--spacing-md);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.78);
}

.hero-metrics strong,
.hero-metrics span {
  display: block;
}

.hero-metrics strong {
  font-size: var(--fs-h4);
  color: var(--color-text);
  line-height: 1.2;
}

.hero-metrics span {
  margin-top: var(--spacing-xs);
  font-size: var(--fs-small);
  color: var(--color-text-secondary);
}

.hero-console {
  min-width: 0;
}

.console-shell {
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 18px;
  background: #1d1d1f;
  box-shadow: 0 28px 80px rgba(0,0,0,0.18), 0 6px 16px rgba(0,0,0,0.12);
}

.console-topbar {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  align-items: center;
  gap: var(--spacing-md);
  min-height: 48px;
  padding: 0 var(--spacing-lg);
  border-bottom: 1px solid #343438;
  background: #29292d;
  color: #f5f5f7;
  font-size: var(--fs-small);
}

.console-topbar strong {
  position: relative;
  padding-left: 14px;
  font-size: var(--fs-small);
  color: #28c840;
}

.console-topbar strong::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #28c840;
  transform: translateY(-50%);
}

.console-body {
  display: grid;
  grid-template-columns: 180px 1fr;
  min-height: 460px;
}

.console-nav {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding: var(--spacing-lg) var(--spacing-md);
  border-right: 1px solid #343438;
  background: #242428;
}

.console-nav span {
  min-height: 38px;
  padding: 9px 12px;
  border-radius: 7px;
  font-size: var(--fs-small);
  color: #9a9aa0;
}

.console-nav .is-active {
  color: #f5f5f7;
  background: #3a3a3e;
}

.console-main {
  padding: var(--spacing-lg);
}

.console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
}

.console-header small,
.console-header b {
  display: block;
}

.console-header small {
  margin-bottom: var(--spacing-xs);
  color: #86868b;
  font-size: var(--fs-small);
}

.console-header b {
  color: #f5f5f7;
  font-size: var(--fs-h4);
}

.console-header button {
  min-height: 34px;
  padding: 0 14px;
  border: none;
  border-radius: 7px;
  background: #f5f5f7;
  color: #1d1d1f;
  font-weight: var(--fw-medium);
}

.phone-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-md);
}

.phone-card {
  padding: var(--spacing-sm);
  border: 1px solid #343438;
  border-radius: 12px;
  background: #2a2a2e;
}

.phone-screen {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  align-content: center;
  aspect-ratio: 9 / 14;
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-lg) var(--spacing-md);
  border-radius: 10px;
  background:
    linear-gradient(145deg, rgba(0,122,255,0.22), rgba(90,200,250,0.08)),
    #161621;
}

.phone-screen span {
  aspect-ratio: 1;
  border-radius: 9px;
  background: #f5f5f7;
  opacity: 0.88;
}

.phone-card b,
.phone-card small {
  display: block;
}

.phone-card b {
  color: #f5f5f7;
  font-size: var(--fs-small);
}

.phone-card small {
  margin-top: 2px;
  color: #86868b;
  font-size: 11px;
}

.phone-card.online {
  box-shadow: inset 0 0 0 1px rgba(40, 200, 64, 0.18);
}

.phone-card.standby {
  opacity: 0.84;
}

.task-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.task-panel div {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  min-height: 42px;
  padding: 0 var(--spacing-md);
  border-radius: 8px;
  background: #242428;
  color: #d2d2d7;
  font-size: var(--fs-small);
}

.task-panel span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #5ac8fa;
}

.hero-mockup {
  max-width: 900px;
  margin: 0 auto;
}

.hero-mockup-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-size: var(--fs-caption);
}

/* --- Features Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-4xl);
}

.feature-card {
  text-align: center;
  padding: var(--spacing-xl);
}

.feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--color-text);
}

.feature-card h3 {
  font-size: var(--fs-h4);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  font-size: var(--fs-caption);
  color: var(--color-text-secondary);
  line-height: var(--lh-caption);
  max-width: 280px;
  margin: 0 auto;
}

/* --- Homepage Combined Sections --- */
.scenario-section .section-subtitle {
  max-width: 720px;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-4xl);
}

.scenario-card {
  min-height: 230px;
  padding: var(--spacing-xl);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  background: #fff;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.scenario-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-border);
  box-shadow: 0 12px 34px rgba(0,0,0,0.06);
}

.scenario-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 30px;
  margin-bottom: var(--spacing-xl);
  border-radius: 999px;
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
}

.scenario-card h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
  font-size: var(--fs-h4);
}

.scenario-card p {
  color: var(--color-text-secondary);
  font-size: var(--fs-caption);
  line-height: var(--lh-caption);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: var(--spacing-6xl);
  align-items: start;
}

.capability-list {
  display: grid;
  gap: var(--spacing-md);
}

.capability-list div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--spacing-lg);
  align-items: start;
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  background: #fff;
}

.capability-list strong {
  color: var(--color-text);
  font-size: var(--fs-body);
}

.capability-list span {
  color: var(--color-text-secondary);
  font-size: var(--fs-caption);
  line-height: var(--lh-caption);
}

.home-pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-4xl);
}

.home-pricing-card {
  padding: var(--spacing-2xl);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  background: #fff;
}

.home-pricing-card.featured {
  border-color: var(--color-text);
  box-shadow: 0 14px 40px rgba(0,0,0,0.08);
}

.home-pricing-card h3 {
  color: var(--color-text);
  font-size: var(--fs-h4);
  margin-bottom: var(--spacing-lg);
}

.home-pricing-card p {
  display: flex;
  align-items: flex-end;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.home-pricing-card p strong {
  color: var(--color-text);
  font-size: 2.2rem;
  line-height: 1;
}

.home-pricing-card p span {
  color: var(--color-text-secondary);
  font-size: var(--fs-caption);
}

.home-pricing-card li {
  padding: var(--spacing-sm) 0;
  border-top: 1px solid var(--color-border-light);
  color: var(--color-text-body);
  font-size: var(--fs-caption);
}

.center-action {
  display: flex;
  justify-content: center;
  margin-top: var(--spacing-3xl);
}

.proof-section {
  background: #101014;
}

.proof-section .section-label,
.proof-section .section-title {
  color: #f5f5f7;
}

.proof-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: var(--spacing-5xl);
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-md);
}

.proof-grid div {
  min-height: 170px;
  padding: var(--spacing-lg);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.04);
}

.proof-grid strong,
.proof-grid span {
  display: block;
}

.proof-grid strong {
  color: #f5f5f7;
  font-size: var(--fs-body);
  margin-bottom: var(--spacing-md);
}

.proof-grid span {
  color: #a1a1a6;
  font-size: var(--fs-caption);
  line-height: var(--lh-caption);
}

/* --- Feature Detail Cards (产品功能页) --- */
.features-detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-4xl);
}

.feature-detail-card {
  padding: var(--spacing-xl);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.feature-detail-card:hover {
  border-color: var(--color-border);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.06);
}

.feature-detail-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
}

.feature-detail-icon svg {
  width: 24px;
  height: 24px;
  stroke: #fff;
}

.feature-detail-card h3 {
  font-size: var(--fs-h4);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.feature-detail-card p {
  font-size: var(--fs-caption);
  color: var(--color-text-secondary);
  line-height: var(--lh-caption);
}

/* --- Specs Table --- */
.specs {
  margin-top: var(--spacing-8xl);
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--spacing-xl);
}

.specs-table th,
.specs-table td {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-size: var(--fs-caption);
}

.specs-table th {
  font-weight: var(--fw-medium);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.specs-table td {
  color: var(--color-text-body);
  border-bottom: 1px solid var(--color-border-light);
}

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

/* --- Pricing --- */
.pricing-header {
  text-align: center;
  margin-bottom: var(--spacing-5xl);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  align-items: start;
}

.pricing-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-2xl) var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-base);
}

.pricing-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.06);
}

.pricing-card.featured {
  border: 2px solid var(--color-text);
  position: relative;
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  padding: 4px 16px;
  border-radius: 20px;
  white-space: nowrap;
}

.pricing-name {
  font-size: var(--fs-h4);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.pricing-price {
  margin-bottom: var(--spacing-lg);
}

.pricing-amount {
  font-size: 3rem;
  font-weight: var(--fw-bold);
  color: var(--color-text);
  line-height: 1;
}

.pricing-currency {
  font-size: var(--fs-h4);
  font-weight: var(--fw-medium);
  vertical-align: super;
}

.pricing-period {
  font-size: var(--fs-caption);
  color: var(--color-text-secondary);
  display: block;
  margin-top: var(--spacing-xs);
}

.pricing-features {
  text-align: left;
  margin-bottom: var(--spacing-xl);
}

.pricing-features li {
  padding: var(--spacing-sm) 0;
  font-size: var(--fs-caption);
  color: var(--color-text-body);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.pricing-features li::before {
  content: "";
  display: inline-block;
  width: 16px;
  height: 16px;
  background: var(--color-bg-dark);
  border-radius: 50%;
  flex-shrink: 0;
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='3'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='3'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
  mask-size: contain;
  -webkit-mask-size: contain;
}

.pricing-card .btn {
  width: 100%;
}

/* --- About --- */
.about-hero {
  padding-top: calc(var(--nav-height) + var(--spacing-8xl));
  padding-bottom: var(--spacing-6xl);
  text-align: center;
}

.about-story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-6xl);
  align-items: center;
}

.about-story-image {
  aspect-ratio: 4 / 3;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-8xl);
}

.stat-card {
  text-align: center;
  padding: var(--spacing-xl);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
}

.stat-number {
  font-size: 3rem;
  font-weight: var(--fw-bold);
  color: var(--color-text);
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: var(--fs-caption);
  color: var(--color-text-secondary);
}

/* --- Contact --- */
.contact-hero {
  padding-top: calc(var(--nav-height) + var(--spacing-8xl));
  padding-bottom: var(--spacing-4xl);
  text-align: center;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-6xl);
  margin-top: var(--spacing-4xl);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--fs-caption);
  font-weight: var(--fw-medium);
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: var(--fs-body);
  font-family: var(--font-family);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-text);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-error {
  font-size: var(--fs-small);
  color: #e74c3c;
  margin-top: var(--spacing-xs);
  display: none;
}

.form-input.error,
.form-textarea.error {
  border-color: #e74c3c;
}

.contact-info {
  padding-top: var(--spacing-xl);
}

.contact-info-item {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.contact-info-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--color-text);
}

.contact-info-item h4 {
  font-size: var(--fs-caption);
  font-weight: var(--fw-medium);
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.contact-info-item p {
  font-size: var(--fs-caption);
  color: var(--color-text-secondary);
}

/* --- CTA Section --- */
.cta-section {
  background: var(--color-bg-dark);
  text-align: center;
  padding: var(--spacing-8xl) var(--spacing-lg);
}

.cta-section .section-title {
  color: var(--color-text-inverse);
}

.cta-section .section-subtitle {
  color: #86868b;
  margin: 0 auto var(--spacing-2xl);
}

/* --- Footer --- */
.footer {
  background: var(--color-bg-footer);
  color: #86868b;
  padding: var(--spacing-6xl) var(--spacing-lg) var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-5xl);
}

.footer-col h4 {
  font-size: var(--fs-caption);
  font-weight: var(--fw-semibold);
  color: var(--color-text-inverse);
  margin-bottom: var(--spacing-lg);
}

.footer-col a {
  display: block;
  font-size: var(--fs-caption);
  color: #86868b;
  margin-bottom: var(--spacing-sm);
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-text-inverse);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--fs-small);
}

/* --- Scroll Animations --- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.stagger-children > *:nth-child(1) { transition-delay: 0s; }
.stagger-children > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children > *:nth-child(3) { transition-delay: 0.2s; }
.stagger-children > *:nth-child(4) { transition-delay: 0.3s; }
.stagger-children > *:nth-child(5) { transition-delay: 0.4s; }
.stagger-children > *:nth-child(6) { transition-delay: 0.5s; }

/* --- Page Header (inner pages) --- */
.page-header {
  padding-top: calc(var(--nav-height) + var(--spacing-7xl));
  padding-bottom: var(--spacing-2xl);
  text-align: center;
}

/* --- Testimonials / Clients --- */
.clients-scroll {
  margin-top: var(--spacing-4xl);
  overflow: hidden;
}

.clients-track {
  display: flex;
  gap: var(--spacing-4xl);
  align-items: center;
  padding: var(--spacing-xl) 0;
}

.client-logo {
  font-size: var(--fs-h4);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  opacity: 0.4;
  white-space: nowrap;
  flex-shrink: 0;
}

/* --- FAQ --- */
.faq {
  margin-top: var(--spacing-8xl);
}

.faq-list {
  max-width: 800px;
  margin: var(--spacing-xl) auto 0;
}

.faq-item {
  border-bottom: 1px solid var(--color-border-light);
  padding: var(--spacing-lg) 0;
}

.faq-question {
  font-size: var(--fs-body);
  font-weight: var(--fw-medium);
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-question::after {
  content: "+";
  font-size: var(--fs-h4);
  font-weight: var(--fw-light);
  color: var(--color-text-secondary);
  transition: transform var(--transition-base);
}

.faq-item.open .faq-question::after {
  content: "\u2212";
}

.faq-answer {
  font-size: var(--fs-caption);
  color: var(--color-text-secondary);
  line-height: var(--lh-caption);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base), padding-top var(--transition-base);
}

.faq-item.open .faq-answer {
  max-height: 200px;
  padding-top: var(--spacing-md);
}

/* --- Responsive --- */
@media (max-width: 1023px) {
  :root {
    --fs-h1: 2.5rem;
    --fs-h2: 2rem;
    --fs-h3: 1.5rem;
    --fs-h4: 1.2rem;
  }

  .section {
    padding: var(--spacing-6xl) var(--spacing-lg);
  }

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

  .about-story {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

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

  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .hero-mockup {
    max-width: 100%;
  }

  .hero-layout,
  .split-section,
  .proof-layout {
    grid-template-columns: 1fr;
    gap: var(--spacing-4xl);
  }

  .hero-copy {
    max-width: 760px;
  }

  .scenario-grid,
  .proof-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .home-pricing-grid {
    grid-template-columns: 1fr;
  }

  .console-body {
    grid-template-columns: 1fr;
  }

  .console-nav {
    flex-direction: row;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid #343438;
  }

  .console-nav span {
    flex: 0 0 auto;
  }
}

@media (max-width: 767px) {
  :root {
    --fs-h1: 2rem;
    --fs-h2: 1.75rem;
    --fs-h3: 1.3rem;
    --fs-h4: 1.1rem;
    --nav-height: 56px;
  }

  .section {
    padding: var(--spacing-5xl) var(--spacing-md);
  }

  .hamburger {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    padding: var(--spacing-lg);
    gap: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border-light);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
  }

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

  .nav-link {
    padding: var(--spacing-sm) 0;
    font-size: var(--fs-body);
  }

  .nav-cta {
    margin-left: 0;
    margin-top: var(--spacing-sm);
  }

  .nav-cta .btn {
    width: 100%;
  }

  .features-grid,
  .features-detail-grid {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }

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

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-actions .btn {
    width: 100%;
    max-width: 280px;
  }

  .stat-number {
    font-size: 2.5rem;
  }

  .hero-combined {
    text-align: left;
  }

  .hero-copy .hero-actions {
    align-items: stretch;
  }

  .hero-copy .hero-actions .btn {
    max-width: none;
  }

  .hero-metrics,
  .scenario-grid,
  .phone-grid,
  .task-panel,
  .proof-grid {
    grid-template-columns: 1fr;
  }

  .console-topbar {
    grid-template-columns: 72px 1fr;
  }

  .console-topbar strong {
    display: none;
  }

  .console-header {
    align-items: flex-start;
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .console-header button {
    width: 100%;
  }

  .capability-list div {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
}
/* --- Product Mockup --- */
.hero-mockup {
  max-width: 960px;
  margin: 0 auto;
}

.mockup-frame {
  background: #1d1d1f;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15), 0 4px 12px rgba(0,0,0,0.08);
  position: relative;
}

.mockup-titlebar {
  display: flex;
  align-items: center;
  padding: 14px 20px;
  background: #2a2a2e;
  border-bottom: 1px solid #3a3a3e;
  gap: 10px;
}

.mockup-dots {
  display: flex;
  gap: 8px;
}

.mockup-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.mockup-dot:nth-child(1) { background: #ff5f57; }
.mockup-dot:nth-child(2) { background: #febc2e; }
.mockup-dot:nth-child(3) { background: #28c840; }

.mockup-title {
  flex: 1;
  text-align: center;
  font-size: 13px;
  color: #86868b;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0.02em;
}

.mockup-body {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 480px;
}

.mockup-sidebar {
  background: #252528;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-right: 1px solid #3a3a3e;
}

.mockup-sidebar-item {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  color: #86868b;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: default;
  transition: all 0.2s;
}

.mockup-sidebar-item:first-child {
  background: #3a3a3e;
  color: #f5f5f7;
}

.mockup-sidebar-icon {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  background: #3a3a3e;
  flex-shrink: 0;
}

.mockup-sidebar-item:first-child .mockup-sidebar-icon {
  background: #f5f5f7;
}

.mockup-main {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.mockup-main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mockup-main-title {
  font-size: 18px;
  font-weight: 600;
  color: #f5f5f7;
}

.mockup-main-action {
  font-size: 12px;
  color: #f5f5f7;
  background: #3a3a3e;
  padding: 6px 14px;
  border-radius: 6px;
}

.mockup-device-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  flex: 1;
}

.mockup-device-card {
  background: #2a2a2e;
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease;
}

.mockup-device-card:hover {
  transform: translateY(-2px);
}

.mockup-device-screen {
  flex: 1;
  background: #1a1a2e;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  aspect-ratio: 9/16;
  max-height: 200px;
  margin: 0 auto;
  width: 100%;
}

.mockup-app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 16px;
  width: 100%;
}

.mockup-app-icon {
  aspect-ratio: 1;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mockup-app-icon:nth-child(1) { background: #007aff; }
.mockup-app-icon:nth-child(2) { background: #34c759; }
.mockup-app-icon:nth-child(3) { background: #ff9500; }
.mockup-app-icon:nth-child(4) { background: #af52de; }
.mockup-app-icon:nth-child(5) { background: #ff3b30; }
.mockup-app-icon:nth-child(6) { background: #5ac8fa; }

.mockup-app-icon-inner {
  width: 16px;
  height: 16px;
  background: rgba(255,255,255,0.9);
  border-radius: 4px;
}

.mockup-device-footer {
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mockup-device-name {
  font-size: 12px;
  color: #f5f5f7;
  font-weight: 500;
}

.mockup-device-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: #86868b;
}

.mockup-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #28c840;
  box-shadow: 0 0 6px rgba(40, 200, 64, 0.5);
}

.mockup-device-card:nth-child(4) .mockup-status-dot {
  background: #febc2e;
  box-shadow: 0 0 6px rgba(254, 188, 46, 0.5);
}

.mockup-pulse {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 8px;
  height: 8px;
  background: #28c840;
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(40, 200, 64, 0.6);
  animation: mockup-pulse 2s infinite;
}

@keyframes mockup-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* About story image */
.about-story-visual {
  aspect-ratio: 4/3;
  background: #1d1d1f;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.about-story-inner {
  text-align: center;
  color: #f5f5f7;
  padding: 40px;
}

.about-story-logo {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: #f5f5f7;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}

.about-story-logo svg {
  width: 36px;
  height: 36px;
}

.about-story-name {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.about-story-tagline {
  font-size: 14px;
  color: #86868b;
}

/* Responsive mockup */
@media (max-width: 1023px) {
  .mockup-body {
    grid-template-columns: 1fr;
  }
  .mockup-sidebar {
    flex-direction: row;
    overflow-x: auto;
    padding: 12px 16px;
    border-right: none;
    border-bottom: 1px solid #3a3a3e;
  }
  .mockup-sidebar-item {
    white-space: nowrap;
    flex-shrink: 0;
  }
  .mockup-device-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .mockup-device-grid {
    grid-template-columns: 1fr;
  }
  .mockup-title {
    display: none;
  }
  .mockup-main {
    padding: 16px;
  }
}