/* 跑路云 PAOLU CLOUD - Neo-Brutalist Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700;800&display=swap');

:root {
  --bg: #fff7ed;
  --bg-soft: #ffedd5;
  --bg-card: #ffffff;
  --fg: #431407;
  --fg-dim: #7c2d12;
  --fg-mute: #9a3412;
  --primary: #ea580c;
  --primary-dark: #c2410c;
  --primary-light: #fb923c;
  --accent: #facc15;
  --accent-dark: #ca8a04;
  --danger: #dc2626;
  --border-color: #1c1917;
  --border-width: 3.5px;
  --shadow-offset: 5px;
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

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

body {
  background-color: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Typography Utility */
h1, h2, h3, h4, .font-display {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--fg);
  line-height: 1.2;
}

/* Neo-brutalist Common Elements */
.box-border {
  border: var(--border-width) solid var(--border-color);
}

.hard-shadow {
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0 0 var(--border-color);
}

.hard-shadow-sm {
  box-shadow: 3px 3px 0 0 var(--border-color);
}

.hard-shadow-lg {
  box-shadow: 8px 8px 0 0 var(--border-color);
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--fg);
  background: var(--primary);
  border: var(--border-width) solid var(--border-color);
  box-shadow: 4px 4px 0 0 var(--border-color);
  cursor: pointer;
  transition: all 0.15s ease-in-out;
  user-select: none;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 0 var(--border-color);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 0 var(--border-color);
}

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

.btn-accent {
  background: var(--accent);
  color: var(--fg);
}

.btn-white {
  background: #ffffff;
  color: var(--fg);
}

.btn-blog {
  background: #38bdf8;
  color: #0c4a6e;
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.9rem;
  box-shadow: 3px 3px 0 0 var(--border-color);
}

/* Stickers and Badges */
.sticker {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 2.5px solid var(--border-color);
  box-shadow: 3px 3px 0 0 var(--border-color);
}

.sticker-yellow {
  background: var(--accent);
  color: var(--fg);
  transform: rotate(-2deg);
}

.sticker-orange {
  background: var(--primary-light);
  color: #ffffff;
  transform: rotate(2deg);
}

.stamp-run {
  display: inline-block;
  background: var(--primary);
  color: #ffffff;
  padding: 0.2rem 0.7rem;
  font-family: var(--font-display);
  font-weight: 800;
  border: 3px solid var(--border-color);
  box-shadow: 4px 4px 0 0 var(--border-color);
  transform: rotate(3deg);
  margin-left: 0.4rem;
}

/* Top Sticky Navigation */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-soft);
  border-bottom: 3.5px solid var(--border-color);
  padding: 0.75rem 0;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--fg);
}

.logo-box {
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: #ffffff;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid var(--border-color);
  box-shadow: 3px 3px 0 0 var(--border-color);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-sub {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--fg-mute);
  letter-spacing: 0.1em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--fg);
  padding: 0.25rem 0.5rem;
  transition: all 0.15s ease;
}

.nav-links a:hover {
  background: var(--accent);
  box-shadow: 2px 2px 0 0 var(--border-color);
}

.nav-links .nav-highlight {
  background: #fde047;
  border: 2px solid var(--border-color);
  box-shadow: 2px 2px 0 0 var(--border-color);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Hero Section */
.hero-section {
  padding: 3.5rem 0 4rem;
  background-color: var(--bg);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: start;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-title {
  font-size: 3.2rem;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.highlight-underline {
  position: relative;
  display: inline-block;
}

.highlight-underline::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 14px;
  background: var(--accent);
  z-index: -1;
  transform: rotate(-1deg);
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--fg-dim);
  font-weight: 500;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

.hero-trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-top: 1rem;
  border-top: 2px dashed rgba(67, 20, 7, 0.2);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--fg-dim);
}

.trust-badge {
  background: #22c55e;
  color: white;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  border: 2px solid var(--border-color);
}

/* Calculator Card */
.calculator-card {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: 7px 7px 0 0 var(--border-color);
  padding: 1.75rem;
  transform: rotate(1deg);
  transition: transform 0.2s ease;
}

.calculator-card:hover {
  transform: rotate(0deg);
}

.calc-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2.5px solid var(--border-color);
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
}

.calc-title {
  font-size: 1.2rem;
  font-weight: 800;
}

.calc-tag {
  background: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border: 1.5px solid var(--border-color);
}

.calc-group {
  margin-bottom: 1.25rem;
}

.calc-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.gpu-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.gpu-btn {
  background: #f8fafc;
  border: 2.5px solid var(--border-color);
  padding: 0.6rem 0.4rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  text-align: center;
  cursor: pointer;
  box-shadow: 2px 2px 0 0 var(--border-color);
  transition: all 0.1s ease;
}

.gpu-btn.active {
  background: var(--primary);
  color: #ffffff;
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 0 var(--border-color);
}

.calc-slider {
  width: 100%;
  height: 12px;
  -webkit-appearance: none;
  background: #fed7aa;
  border: 2.5px solid var(--border-color);
  outline: none;
  cursor: pointer;
}

.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  background: var(--primary);
  border: 2.5px solid var(--border-color);
  box-shadow: 2px 2px 0 0 var(--border-color);
  cursor: pointer;
}

.calc-slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  background: var(--primary);
  border: 2.5px solid var(--border-color);
  box-shadow: 2px 2px 0 0 var(--border-color);
  cursor: pointer;
}

.calc-result {
  background: #18181b;
  color: #ffffff;
  border: 2.5px solid var(--border-color);
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.result-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 700;
}

.result-price {
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.result-warning {
  font-size: 0.78rem;
  color: #fb7185;
  text-align: right;
  max-width: 150px;
  line-height: 1.3;
  font-weight: 600;
}

/* Striped Divider */
.stripe-divider {
  width: 100%;
  height: 18px;
  background: repeating-linear-gradient(
    -45deg,
    #facc15,
    #facc15 15px,
    #1c1917 15px,
    #1c1917 30px
  );
  border-top: 3px solid var(--border-color);
  border-bottom: 3px solid var(--border-color);
}

/* Scroll Narrative Section */
.narrative-section {
  background: #2b0d04;
  color: #fff7ed;
  padding: 4.5rem 0;
  position: relative;
}

.narrative-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3.5rem;
}

.narrative-header h2 {
  color: #ffffff;
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.narrative-header p {
  color: #fdba74;
  font-size: 1.1rem;
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.step-card {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 2rem;
  align-items: center;
  background: #431407;
  border: 3px solid #000000;
  padding: 2rem;
  box-shadow: 6px 6px 0 0 #facc15;
  opacity: 0.25;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.step-card.in-view {
  opacity: 1;
  transform: translateY(0);
}

.step-num {
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 0.9;
  text-align: center;
  text-shadow: 3px 3px 0 #000000;
}

.step-info {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.step-title-wrap {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

.step-title {
  font-size: 1.6rem;
  color: #ffffff;
  font-weight: 700;
}

.step-subtag {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  background: rgba(0, 0, 0, 0.4);
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--accent);
}

.step-desc {
  font-size: 1.05rem;
  color: #ffedd5;
  line-height: 1.7;
}

/* Feature Grid */
.features-section {
  padding: 5rem 0;
  background: var(--bg);
}

.section-head {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3rem;
}

.section-head h2 {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.section-head p {
  color: var(--fg-dim);
  font-size: 1.15rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: 6px 6px 0 0 var(--border-color);
  padding: 2rem;
  transition: all 0.2s ease;
  position: relative;
}

.feature-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 0 var(--primary);
}

.feature-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.feature-idx {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--fg-mute);
}

.feature-icon {
  font-size: 2.2rem;
}

.feature-title {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.feature-desc {
  color: var(--fg-dim);
  font-size: 0.98rem;
  line-height: 1.65;
}

/* Streaming & AI Cards */
.media-section {
  padding: 4.5rem 0;
  background: var(--bg-soft);
  border-top: 3.5px solid var(--border-color);
  border-bottom: 3.5px solid var(--border-color);
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.media-card {
  background: var(--bg-card);
  border: 3px solid var(--border-color);
  box-shadow: 5px 5px 0 0 var(--border-color);
  padding: 1.5rem;
  text-align: center;
  transition: all 0.2s ease;
}

.media-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 0 var(--border-color);
}

.media-badge {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.media-name {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.media-feature {
  font-size: 0.85rem;
  color: var(--fg-mute);
  font-weight: 600;
}

/* Pricing Section */
.pricing-section {
  padding: 5rem 0;
  background: var(--bg);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: 8px 8px 0 0 var(--border-color);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.2s ease;
}

.pricing-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 11px 11px 0 0 var(--border-color);
}

.pricing-card.featured {
  background: #fef08a;
  transform: rotate(-1deg);
}

.pricing-card.featured:hover {
  transform: rotate(0deg) translate(-3px, -3px);
  box-shadow: 11px 11px 0 0 var(--primary);
}

.ribbon {
  position: absolute;
  top: -14px;
  right: 18px;
  background: var(--danger);
  color: #ffffff;
  padding: 0.25rem 0.85rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.8rem;
  border: 2px solid var(--border-color);
  box-shadow: 3px 3px 0 0 var(--border-color);
  transform: rotate(3deg);
}

.plan-name {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.plan-desc {
  font-size: 0.9rem;
  color: var(--fg-dim);
  margin-bottom: 1.5rem;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px dashed rgba(67, 20, 7, 0.25);
  padding-bottom: 1.25rem;
}

.currency {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--fg);
}

.amount {
  font-size: 3rem;
  font-weight: 800;
  font-family: var(--font-display);
  line-height: 1;
}

.period {
  font-size: 0.95rem;
  color: var(--fg-mute);
  font-weight: 600;
}

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 500;
}

.plan-features li .check {
  color: #16a34a;
  font-weight: 800;
}

/* Testimonials */
.testimonials-section {
  padding: 4.5rem 0;
  background: var(--bg-soft);
  border-top: 3.5px solid var(--border-color);
}

.test-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.test-card {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: 6px 6px 0 0 var(--border-color);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.test-stars {
  color: #eab308;
  font-size: 1.1rem;
}

.test-quote {
  font-size: 0.98rem;
  font-weight: 500;
  line-height: 1.6;
}

.test-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 2px dashed rgba(67, 20, 7, 0.15);
}

.test-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-family: var(--font-display);
}

.test-name {
  font-weight: 700;
  font-size: 0.95rem;
}

.test-role {
  font-size: 0.8rem;
  color: var(--fg-mute);
}

/* FAQ Section */
.faq-section {
  padding: 5rem 0;
  background: var(--bg);
}

.faq-list {
  max-width: 850px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.faq-item {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: 5px 5px 0 0 var(--border-color);
}

.faq-question {
  padding: 1.25rem 1.5rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-icon {
  font-size: 1.3rem;
  font-weight: 800;
  transition: transform 0.2s ease;
}

.faq-answer {
  padding: 0 1.5rem 1.25rem;
  color: var(--fg-dim);
  font-size: 1rem;
  line-height: 1.7;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

/* Footer */
.site-footer {
  background: #2b0d04;
  color: #ffedd5;
  border-top: 6px solid var(--primary);
  padding: 4.5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  color: #fdba74;
  margin-top: 1rem;
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer-nav-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-title {
  color: #ffffff;
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  font-family: var(--font-display);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  color: #ffedd5;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 2px solid rgba(255, 237, 213, 0.15);
}

.footer-stamp {
  background: var(--danger);
  color: #ffffff;
  padding: 0.35rem 0.85rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.85rem;
  border: 2px solid #000000;
  box-shadow: 3px 3px 0 0 #000000;
  transform: rotate(-3deg);
}

.footer-copy {
  font-size: 0.88rem;
  color: #fdba74;
}

/* Mobile Responsive */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .feature-grid, .pricing-grid, .test-grid {
    grid-template-columns: 1fr;
  }
  .media-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .pricing-card.featured {
    transform: none;
  }
}

@media (max-width: 640px) {
  .header-nav {
    padding: 0.6rem 0;
  }
  .nav-links {
    display: none; /* simple mobile behavior or minimal dropdown */
  }
  .hero-title {
    font-size: 2.3rem;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .step-card {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 1.5rem;
  }
  .step-num {
    text-align: left;
    font-size: 3.5rem;
  }
  .media-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}