/* ============================================================
   Manaont 玛那 · 设计系统
   "一句话，一个产品的开始"
   ============================================================ */

/* --- Design Tokens --- */
:root {
  /* Background */
  --bg-root: #0B1018;
  --bg-base: #131A28;
  --bg-float: #1A2336;
  --bg-shallow: #212D42;

  /* Text */
  --text-primary: #F0EDE6;
  --text-secondary: #8B929E;
  --text-muted: #545D6B;

  /* Accent — Amber Gold */
  --accent: #E8A840;
  --accent-light: #F0CC7C;
  --accent-dim: #B8802E;

  /* Functional — sub-product colors */
  --color-bangbang: #3DA878;
  --color-aibid: #4A90D9;
  --color-hetong: #D98A4A;

  /* Spacing */
  --section-gap: 120px;
  --content-max: 1200px;
  --hero-max: 900px;
  --card-gap: 24px;
  --block-gap: 16px;
  --elem-gap: 8px;

  /* Radius */
  --radius-card: 6px;
  --radius-btn: 4px;

  /* Type */
  --font-display: "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", "Consolas", monospace;

  /* Transitions */
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 600ms;
}

/* --- Light Theme --- */
[data-theme="light"] {
  --bg-root: #F6F3ED;
  --bg-base: #FFFFFF;
  --bg-float: #F1EFEA;
  --bg-shallow: #DDD9D1;

  --text-primary: #1A1D24;
  --text-secondary: #5A5F6B;
  --text-muted: #949AA5;

  --accent: #C4882E;
  --accent-light: #E8A840;
  --accent-dim: #9C6A1E;

  --color-bangbang: #2D8A64;
  --color-aibid: #3570B0;
  --color-hetong: #C07030;
}

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

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.75;
  color: var(--text-primary);
  background: var(--bg-base);
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* --- Typography Scale --- */
.display-xl {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1.15;
  letter-spacing: 0.02em;
}

.display-lg {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  line-height: 1.2;
  letter-spacing: 0.01em;
}

.heading-md {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  line-height: 1.3;
}

.heading-sm {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.125rem;
  line-height: 1.4;
}

.body-text {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

.caption {
  font-size: 0.875rem;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
}

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

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

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  width: 100%;
  max-width: var(--hero-max);
  margin: 0 auto;
  padding: 0 24px;
}

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

.section-label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header .display-lg {
  margin-bottom: 16px;
}

.section-header .body-text {
  max-width: 600px;
  margin: 0 auto;
}

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  background: transparent;
  transition: background var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.navbar.scrolled {
  background: rgba(19, 26, 40, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
  padding: 10px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--duration-normal) var(--ease-out);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* --- Nav Dropdown --- */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 0;
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: inherit;
  position: relative;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-dropdown-trigger::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav-dropdown-trigger .chevron {
  width: 14px;
  height: 14px;
  transition: transform var(--duration-normal) var(--ease-out);
}

.nav-dropdown.open .nav-dropdown-trigger {
  color: var(--text-primary);
}

.nav-dropdown.open .nav-dropdown-trigger::after {
  width: 100%;
}

.nav-dropdown.open .nav-dropdown-trigger .chevron {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-float);
  border: 1px solid var(--bg-shallow);
  border-radius: 8px;
  padding: 8px;
  min-width: 140px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
  transform: translateX(-50%) translateY(-4px);
}

.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown-menu a {
  display: block;
  padding: 8px 14px;
  border-radius: 5px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

.nav-dropdown-menu a::after {
  display: none;
}

.nav-dropdown-menu a:hover,
.nav-dropdown-menu a.active {
  color: var(--text-primary);
  background: rgba(232, 168, 64, 0.08);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

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

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-normal) var(--ease-out);
}

.nav-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: var(--radius-btn);
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #1A1C20;
}

.btn-primary:hover {
  background: var(--accent-light);
  box-shadow: 0 0 24px rgba(232, 168, 64, 0.25);
}

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

.btn-secondary:hover {
  background: rgba(232, 168, 64, 0.08);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.8125rem;
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--bg-root);
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero .container-narrow {
  position: relative;
  z-index: 2;
  text-align: center;
  padding-top: 40px;
  padding-bottom: 80px;
}

.hero-tagline {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero-title {
  margin-bottom: 24px;
}

.hero-title .accent-dot {
  color: var(--accent);
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  opacity: 0.5;
  animation: floatDown 2s ease-in-out infinite;
}

.hero-scroll-hint span {
  display: block;
  width: 1px;
  height: 32px;
  background: linear-gradient(to bottom, var(--text-secondary), transparent);
  margin: 0 auto 8px;
}

.hero-scroll-hint .caption {
  font-size: 0.75rem;
}

@keyframes floatDown {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* --- Brand Story --- */
.brand-story {
  background: var(--bg-base);
}

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

.story-block {
  padding: 40px;
  background: var(--bg-float);
  border-radius: var(--radius-card);
  border: 1px solid var(--bg-shallow);
}

.story-block .etymology {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.story-block .heading-sm {
  margin-bottom: 12px;
}

.story-block .body-text {
  font-size: 0.9375rem;
}

.story-synthesis {
  text-align: center;
  padding: 40px;
  border-top: 1px solid var(--bg-shallow);
}

.story-synthesis .heading-md {
  margin-bottom: 12px;
}

.story-synthesis .body-text {
  max-width: 700px;
  margin: 0 auto;
}

/* --- Feature Cards (3-col) --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--card-gap);
}

.feature-card {
  padding: 36px;
  background: var(--bg-float);
  border-radius: var(--radius-card);
  border: 1px solid var(--bg-shallow);
  transition: border-color var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

.feature-card:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(232, 168, 64, 0.1);
  margin-bottom: 20px;
  color: var(--accent);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
}

.feature-card .heading-sm {
  margin-bottom: 8px;
}

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

.process-steps.steps-5 {
  grid-template-columns: repeat(5, 1fr);
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 24px;
  left: calc(12.5% + 12px);
  right: calc(12.5% + 12px);
  height: 1px;
  background: var(--bg-shallow);
}

.process-step {
  text-align: center;
  position: relative;
  padding: 0 16px;
}

.step-dot {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--bg-float);
  border: 1px solid var(--bg-shallow);
  margin: 0 auto 20px;
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: border-color var(--duration-normal) var(--ease-out),
              color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.step-dot svg {
  width: 24px;
  height: 24px;
}

.process-step.visible .step-dot {
  border-color: var(--accent-dim);
  color: var(--accent);
  box-shadow: 0 0 20px rgba(232, 168, 64, 0.15);
}

.step-label {
  font-weight: 500;
  margin-bottom: 4px;
}

.step-detail {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* --- Product Matrix --- */
.product-matrix {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--card-gap);
  align-items: stretch;
}

.product-card {
  background: var(--bg-float);
  border-radius: var(--radius-card);
  border: 1px solid var(--bg-shallow);
  padding: 36px;
  transition: border-color var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

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

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.product-card.main-card {
  grid-row: span 1;
}

.product-card.main-card::before {
  background: var(--accent);
  height: 4px;
}

.product-card.main-card:hover {
  border-color: var(--accent-dim);
}

.product-card.sub-card.bangbang::before { background: var(--color-bangbang); }
.product-card.sub-card.aibid::before { background: var(--color-aibid); }
.product-card.sub-card.hetong::before { background: var(--color-hetong); }

.product-card.sub-card.bangbang:hover { border-color: var(--color-bangbang); }
.product-card.sub-card.aibid:hover { border-color: var(--color-aibid); }
.product-card.sub-card.hetong:hover { border-color: var(--color-hetong); }

.product-card .platform-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 3px;
  margin-bottom: 16px;
}

.product-card.main-card .platform-badge {
  background: rgba(232, 168, 64, 0.12);
  color: var(--accent);
}

.product-card.sub-card .platform-badge {
  background: rgba(139, 146, 158, 0.1);
  color: var(--text-muted);
}

.product-card .heading-md {
  margin-bottom: 8px;
}

.product-card .body-text {
  font-size: 0.9375rem;
  margin-bottom: 20px;
}

.product-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--text-primary);
  transition: color var(--duration-fast) var(--ease-out);
}

.product-card.main-card .card-link { color: var(--accent); }
.product-card.sub-card.bangbang .card-link:hover { color: var(--color-bangbang); }
.product-card.sub-card.aibid .card-link:hover { color: var(--color-aibid); }
.product-card.sub-card.hetong .card-link:hover { color: var(--color-hetong); }

.product-card .card-link .arrow {
  transition: transform var(--duration-fast) var(--ease-out);
}

.product-card .card-link:hover .arrow {
  transform: translateX(3px);
}

.product-matrix-footer {
  grid-column: 1 / -1;
  text-align: center;
  padding-top: 24px;
}

/* --- Pricing --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--card-gap);
}

.pricing-card {
  background: var(--bg-float);
  border-radius: var(--radius-card);
  border: 1px solid var(--bg-shallow);
  padding: 40px 36px;
  text-align: center;
  transition: border-color var(--duration-normal) var(--ease-out);
}

.pricing-card.featured {
  border-color: var(--accent-dim);
  position: relative;
}

.pricing-card.featured::before {
  content: '推荐';
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  background: rgba(232, 168, 64, 0.1);
  padding: 2px 10px;
  border-radius: 3px;
}

.pricing-name {
  font-weight: 500;
  margin-bottom: 16px;
}

.pricing-price {
  margin-bottom: 24px;
}

.pricing-price .amount {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 2.5rem;
  color: var(--accent);
}

.pricing-price .period {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.pricing-features {
  text-align: left;
  margin-bottom: 32px;
}

.pricing-features li {
  padding: 8px 0;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-features li::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-dim);
  flex-shrink: 0;
}

/* --- Cases --- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--card-gap);
}

.case-card {
  background: var(--bg-float);
  border-radius: var(--radius-card);
  border: 1px solid var(--bg-shallow);
  padding: 36px;
}

.case-card .case-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.case-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-shallow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.case-name {
  font-weight: 500;
  font-size: 0.9375rem;
}

.case-role {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.case-card .body-text {
  font-style: italic;
  font-size: 0.9375rem;
}

/* --- FAQ --- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--bg-shallow);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 0;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1rem;
  color: var(--text-primary);
  transition: color var(--duration-fast) var(--ease-out);
}

.faq-question:hover {
  color: var(--accent);
}

.faq-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
  transition: transform var(--duration-normal) var(--ease-out);
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background: var(--text-secondary);
  transition: background var(--duration-fast) var(--ease-out);
}

.faq-icon::before {
  top: 9px;
  left: 0;
  width: 20px;
  height: 2px;
}

.faq-icon::after {
  top: 0;
  left: 9px;
  width: 2px;
  height: 20px;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-slow) var(--ease-out),
              padding var(--duration-slow) var(--ease-out);
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding-bottom: 20px;
}

.faq-answer .body-text {
  font-size: 0.9375rem;
}

/* --- Ecosystem Tag (product pages) --- */
.eco-tag {
  background: var(--bg-float);
  padding: 14px 20px;
  margin-top: 68px;
  margin-bottom: 0;
  text-align: center;
}

.eco-tag .caption {
  color: var(--text-secondary);
}

/* --- Product Hero (sub pages) --- */
.product-hero {
  background: var(--bg-root);
  padding: 140px 0 80px;
  text-align: center;
}

.product-hero .product-icon {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}

.product-hero .product-icon svg {
  width: 36px;
  height: 36px;
}

.product-hero .product-icon.bangbang { background: rgba(61, 168, 120, 0.12); color: var(--color-bangbang); }
.product-hero .product-icon.aibid { background: rgba(74, 144, 217, 0.12); color: var(--color-aibid); }
.product-hero .product-icon.hetong { background: rgba(217, 138, 74, 0.12); color: var(--color-hetong); }

.product-hero .body-text {
  max-width: 600px;
  margin: 0 auto 40px;
}

/* --- Feature Alternating Rows (product pages) --- */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 48px 0;
}

.feature-row + .feature-row {
  border-top: 1px solid var(--bg-shallow);
}

.feature-row.reverse .feature-visual {
  order: -1;
}

.feature-visual {
  background: var(--bg-float);
  border-radius: var(--radius-card);
  border: 1px solid var(--bg-shallow);
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.feature-content .heading-md {
  margin-bottom: 12px;
}

.feature-content .body-text {
  margin-bottom: 16px;
}

.feature-content ul {
  list-style: none;
}

.feature-content ul li {
  padding: 6px 0;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.feature-content ul li::before {
  content: '•';
  color: var(--accent);
  flex-shrink: 0;
}

/* --- Pricing Table (product pages) --- */
.pricing-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 24px;
}

.pricing-table th,
.pricing-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--bg-shallow);
  font-size: 0.9375rem;
}

.pricing-table th {
  font-weight: 500;
  color: var(--text-primary);
  background: var(--bg-float);
}

.pricing-table td {
  color: var(--text-secondary);
}

.pricing-table .price-highlight {
  color: var(--accent);
  font-weight: 500;
}

/* --- Training Page --- */
.training-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--bg-shallow);
}

.training-tab {
  padding: 14px 28px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1rem;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: all var(--duration-fast) var(--ease-out);
}

.training-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.training-tab:hover {
  color: var(--text-primary);
}

.training-panel {
  display: none;
}

.training-panel.active {
  display: block;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--card-gap);
}

.course-card {
  background: var(--bg-float);
  border-radius: var(--radius-card);
  border: 1px solid var(--bg-shallow);
  padding: 32px;
}

.course-level {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 3px;
  margin-bottom: 16px;
}

.course-level.beginner { background: rgba(61, 168, 120, 0.12); color: var(--color-bangbang); }
.course-level.intermediate { background: rgba(74, 144, 217, 0.12); color: var(--color-aibid); }
.course-level.advanced { background: rgba(217, 138, 74, 0.12); color: var(--color-hetong); }

.course-card .heading-sm {
  margin-bottom: 8px;
}

.course-card .body-text {
  font-size: 0.875rem;
  margin-bottom: 16px;
}

.course-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--bg-shallow);
}

.course-price {
  font-weight: 600;
  color: var(--accent);
}

.course-duration {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* --- About Page --- */
.about-hero {
  background: var(--bg-root);
  padding: 160px 0 80px;
  text-align: center;
}

.about-story {
  max-width: 800px;
  margin: 0 auto;
}

.about-story .body-text {
  margin-bottom: 24px;
  font-size: 1.0625rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--card-gap);
}

.contact-card {
  background: var(--bg-float);
  border-radius: var(--radius-card);
  border: 1px solid var(--bg-shallow);
  padding: 32px;
  text-align: center;
}

.contact-card .contact-icon {
  margin-bottom: 16px;
  color: var(--accent);
}

.contact-card .contact-icon svg {
  width: 32px;
  height: 32px;
}

.contact-card .heading-sm {
  margin-bottom: 8px;
}

/* --- Footer --- */
.footer {
  background: var(--bg-root);
  padding: 80px 0 40px;
  border-top: 1px solid var(--bg-shallow);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand img {
  height: 32px;
  width: auto;
  margin-bottom: 12px;
}

.footer-brand .caption {
  max-width: 280px;
}

.footer-col .heading-sm {
  font-size: 0.9375rem;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  padding: 4px 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid var(--bg-shallow);
}

.footer-bottom .caption {
  font-size: 0.8125rem;
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-float);
  border: 1px solid var(--bg-shallow);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: all var(--duration-normal) var(--ease-out);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  background: var(--bg-shallow);
  color: var(--text-primary);
}

/* --- Bottom CTA Banner (product pages) --- */
.bottom-cta {
  background: var(--bg-float);
  border-radius: var(--radius-card);
  border: 1px solid var(--bg-shallow);
  padding: 48px;
  text-align: center;
}

.bottom-cta .heading-md {
  margin-bottom: 8px;
}

.bottom-cta .body-text {
  margin-bottom: 24px;
}

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

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

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .particles-canvas { display: none; }
}

/* --- Responsive: Tablet (768–1199) --- */
@media (max-width: 1199px) {
  :root {
    --section-gap: 80px;
  }

  .nav-links { gap: 24px; }
  .nav-links a { font-size: 0.875rem; }

  .story-grid { grid-template-columns: 1fr; gap: 24px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .process-steps.steps-5 { grid-template-columns: repeat(3, 1fr); }
  .process-steps::before { display: none; }
  .product-matrix { grid-template-columns: 1fr 1fr; }
  .product-card.main-card { grid-column: 1 / -1; }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-card.featured { grid-column: 1 / -1; }
  .cases-grid { grid-template-columns: 1fr; }
  .course-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .feature-row {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .feature-row.reverse .feature-visual { order: 0; }
}

/* --- Responsive: Mobile (<768) --- */
@media (max-width: 767px) {
  :root {
    --section-gap: 64px;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-root);
    flex-direction: column;
    justify-content: center;
    gap: 32px;
    z-index: 999;
  }

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

  .nav-links a {
    font-size: 1.25rem;
  }

  .nav-toggle { display: flex; z-index: 1001; }
  .nav-actions .btn { display: none; }
  .nav-actions.mobile-visible .btn { display: inline-flex; }

  .hero { padding-top: 60px; min-height: 90vh; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 100%; max-width: 280px; }

  .features-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; gap: 24px; }
  .process-steps.steps-5 { grid-template-columns: 1fr; }
  .process-steps::before { display: none; }
  .product-matrix { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .course-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .feature-row {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 0;
  }
  .feature-row.reverse .feature-visual { order: 0; }
  .section-header { margin-bottom: 40px; }
  .bottom-cta { padding: 32px 24px; }
  .story-block { padding: 28px; }
  .back-to-top { bottom: 20px; right: 20px; }
}

/* ============================================================
   Light Theme Overrides
   ============================================================ */
[data-theme="light"] .navbar.scrolled {
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .hero-scroll-hint span {
  background: linear-gradient(to bottom, var(--text-secondary), transparent);
}

[data-theme="light"] .btn-secondary {
  border-color: var(--accent);
  color: var(--accent);
}

[data-theme="light"] .btn-secondary:hover {
  background: rgba(196, 136, 46, 0.08);
}

[data-theme="light"] .btn-ghost {
  color: var(--text-secondary);
}

[data-theme="light"] .btn-ghost:hover {
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .feature-icon {
  background: rgba(196, 136, 46, 0.08);
}

[data-theme="light"] .product-card.main-card .platform-badge {
  background: rgba(196, 136, 46, 0.1);
}

[data-theme="light"] .pricing-card.featured::before {
  background: rgba(196, 136, 46, 0.1);
}

[data-theme="light"] .pricing-features li::before {
  background: var(--accent);
}

[data-theme="light"] .back-to-top {
  background: var(--bg-float);
  border-color: var(--bg-shallow);
}

[data-theme="light"] .back-to-top:hover {
  background: var(--bg-shallow);
}

[data-theme="light"] .course-level.beginner { background: rgba(45, 138, 100, 0.1); }
[data-theme="light"] .course-level.intermediate { background: rgba(53, 112, 176, 0.1); }
[data-theme="light"] .course-level.advanced { background: rgba(192, 112, 48, 0.1); }

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

.theme-toggle:hover {
  color: var(--accent);
  background: rgba(232, 168, 64, 0.08);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

/* ============================================================
   Modal
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(11, 16, 24, 0.75);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  position: relative;
  background: var(--bg-float);
  border: 1px solid var(--bg-shallow);
  border-radius: 12px;
  padding: 48px 40px 40px;
  text-align: center;
  max-width: 380px;
  width: 90%;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px;
  border-radius: 4px;
  display: flex;
  transition: color var(--duration-fast) var(--ease-out);
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-qr {
  width: 200px;
  height: 200px;
  margin: 0 auto 24px;
  border-radius: 8px;
  border: 2px solid var(--bg-shallow);
}

.modal-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

[data-theme="light"] .modal-overlay {
  background: rgba(0, 0, 0, 0.35);
}