/* ============================================
   MAME 官方推广网站样式表
   配色方案基于 Logo 渐变：深蓝 #00274f → 亮青 #68cafb
   扁平现代专业风格 | 禁止使用 emoji 图标
   ============================================ */

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #0d1b2a;
  background-color: #ffffff;
  overflow-x: hidden;
}

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

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

ul,
ol {
  list-style: none;
}

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

/* ---------- CSS 变量 ---------- */
:root {
  --color-primary: #003871;
  --color-primary-dark: #002c5b;
  --color-primary-light: #00417e;
  --color-accent: #68cafb;
  --color-accent-dark: #4ab8f0;
  --color-accent-light: #a8e0fd;

  --color-bg: #ffffff;
  --color-bg-alt: #f5f8fc;
  --color-bg-dark: #00244b;

  --color-text: #0d1b2a;
  --color-text-muted: #5a6478;
  --color-text-inverse: #ffffff;

  --color-border: #e1e8f0;
  --color-border-dark: #2a3a55;

  --color-success: #1abc6c;
  --color-warning: #f5a623;
  --color-danger: #e74c3c;

  --shadow-sm: 0 1px 3px rgba(0, 39, 79, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 39, 79, 0.08);
  --shadow-lg: 0 12px 32px rgba(0, 39, 79, 0.12);
  --shadow-xl: 0 24px 60px rgba(0, 39, 79, 0.16);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --container-max: 1200px;
  --header-height: 68px;

  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.container-narrow {
  max-width: 820px;
}

/* ---------- 文本对齐 ---------- */
.text-center {
  text-align: center;
}

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

/* ---------- 区块通用 ---------- */
.section {
  padding: 88px 0;
}

.section-sm {
  padding: 56px 0;
}

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

.section-dark {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: var(--color-text-inverse);
}

/* ---------- 标题区 ---------- */
.section-header {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-eyebrow {
  display: inline-block;
  padding: 6px 14px;
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  background-color: rgba(104, 202, 251, 0.15);
  border-radius: var(--radius-full);
}

.section-dark .section-eyebrow {
  color: var(--color-accent);
  background-color: rgba(104, 202, 251, 0.18);
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.section-dark .section-title {
  color: #ffffff;
}

.section-subtitle {
  font-size: 17px;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.section-dark .section-subtitle {
  color: rgba(255, 255, 255, 0.78);
}

@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }
  .section-title {
    font-size: 28px;
  }
  .section-subtitle {
    font-size: 15px;
  }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-md);
  transition: var(--transition);
  white-space: nowrap;
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #ffffff;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-accent-dark) 100%);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  color: var(--color-primary-dark);
  box-shadow: 0 4px 16px rgba(104, 202, 251, 0.4);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(104, 202, 251, 0.55);
}

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

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
  background-color: rgba(104, 202, 251, 0.06);
}

.btn-outline-light {
  background-color: transparent;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.35);
}

.btn-outline-light:hover {
  border-color: #ffffff;
  background-color: rgba(255, 255, 255, 0.1);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}

.btn-block {
  width: 100%;
  display: flex;
}

/* ---------- 图标（SVG 内联） ---------- */
.icon {
  display: inline-block;
  width: 24px;
  height: 24px;
  vertical-align: middle;
  fill: currentColor;
  flex-shrink: 0;
}

.icon-sm {
  width: 18px;
  height: 18px;
}

.icon-lg {
  width: 32px;
  height: 32px;
}

.icon-xl {
  width: 48px;
  height: 48px;
}

/* ============================================
   头部导航
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.brand-logo {
  height: 26px;
  width: auto;
}

.brand-text {
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent-dark) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.nav-link {
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background-color: rgba(104, 202, 251, 0.1);
}

.nav-cta {
  margin-left: 12px;
  padding: 10px 22px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}

.menu-toggle .icon {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

@media (max-width: 960px) {
  .menu-toggle {
    display: inline-flex;
  }
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background-color: #ffffff;
    border-bottom: 1px solid var(--color-border);
    padding: 12px 24px;
    transform: translateY(-110%);
    transition: transform 0.3s ease;
    box-shadow: var(--shadow-lg);
  }
  .nav.open {
    transform: translateY(0);
  }
  .nav-link {
    padding: 14px 12px;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
  }
  .nav-link:last-of-type {
    border-bottom: none;
  }
  .nav-cta {
    margin: 12px 0 4px;
    text-align: center;
  }
}

/* ============================================
   首页 Hero
   ============================================ */
.hero {
  position: relative;
  padding: 96px 0 80px;
  background: linear-gradient(135deg, #001a36 0%, #00274f 50%, #003a73 100%);
  color: #ffffff;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(104, 202, 251, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(104, 202, 251, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  margin-bottom: 24px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: rgba(104, 202, 251, 0.12);
  border: 1px solid rgba(104, 202, 251, 0.3);
  border-radius: var(--radius-full);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--color-accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.2); }
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  color: #ffffff;
}

.hero-title .accent {
  background: linear-gradient(90deg, var(--color-accent) 0%, #ffffff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 18px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 36px;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-stat .num {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}

.hero-stat .label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

.hero-visual {
  position: relative;
  padding: 24px;
}

.hero-mockup {
  background: linear-gradient(135deg, rgba(104, 202, 251, 0.1) 0%, rgba(0, 39, 79, 0.3) 100%);
  border: 1px solid rgba(104, 202, 251, 0.25);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(10px);
}

.hero-mockup-screen {
  background: linear-gradient(180deg, #001a36 0%, #00274f 100%);
  border-radius: var(--radius-md);
  border: 1px solid rgba(104, 202, 251, 0.3);
  padding: 20px;
  margin-bottom: 16px;
  font-family: "Courier New", "Consolas", monospace;
  font-size: 13px;
  color: var(--color-accent);
  min-height: 180px;
}

.hero-mockup-screen .line {
  display: block;
  opacity: 0.85;
  margin-bottom: 4px;
}

.hero-mockup-screen .cursor {
  display: inline-block;
  width: 8px;
  height: 14px;
  background-color: var(--color-accent);
  animation: blink 1s infinite;
  vertical-align: middle;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.hero-mockup-meta {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.65);
}

@media (max-width: 960px) {
  .hero {
    padding: 56px 0 48px;
  }
  .hero .container {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero-title {
    font-size: 36px;
  }
  .hero-desc {
    font-size: 16px;
  }
  .hero-visual {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .hero-stat .num {
    font-size: 24px;
  }
}

/* ============================================
   信任条 / Logo 云
   ============================================ */
.trust-bar {
  padding: 36px 0;
  background-color: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}

.trust-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  text-align: center;
  margin-bottom: 24px;
}

.trust-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 40px;
}

.trust-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-muted);
  opacity: 0.7;
  transition: opacity 0.2s;
  letter-spacing: 0.02em;
}

.trust-logo:hover {
  opacity: 1;
  color: var(--color-primary);
}

/* ============================================
   特性卡片网格
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent-light);
  box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0, 39, 79, 0.08) 0%, rgba(104, 202, 251, 0.15) 100%);
  color: var(--color-primary);
  margin-bottom: 20px;
}

.feature-icon .icon {
  width: 26px;
  height: 26px;
}

.feature-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.feature-desc {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.65;
}

@media (max-width: 960px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   使用场景区
   ============================================ */
.scenarios {
  background-color: var(--color-bg-alt);
}

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.scenario-card {
  display: flex;
  gap: 20px;
  padding: 28px;
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.scenario-card:hover {
  border-color: var(--color-accent-light);
  box-shadow: var(--shadow-md);
}

.scenario-num {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-dark) 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
}

.scenario-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.scenario-body p {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.65;
}

@media (max-width: 768px) {
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   用户评价
   ============================================ */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial {
  padding: 28px;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  position: relative;
  transition: var(--transition);
}

.testimonial:hover {
  border-color: var(--color-accent-light);
  box-shadow: var(--shadow-md);
}

.testimonial-rating {
  display: flex;
  gap: 2px;
  margin-bottom: 14px;
  color: #f5a623;
}

.testimonial-rating .icon {
  width: 16px;
  height: 16px;
}

.testimonial-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-dark) 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.testimonial-meta .name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  display: block;
}

.testimonial-meta .role {
  font-size: 12px;
  color: var(--color-text-muted);
}

@media (max-width: 960px) {
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   平台支持区
   ============================================ */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.platform-card {
  padding: 28px 20px;
  text-align: center;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.platform-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.platform-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, rgba(104, 202, 251, 0.15) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.platform-icon .icon {
  width: 30px;
  height: 30px;
}

.platform-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

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

@media (max-width: 768px) {
  .platforms-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================
   CTA 区
   ============================================ */
.cta-section {
  padding: 72px 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 500px;
  height: 100%;
  background: radial-gradient(circle at right, rgba(104, 202, 251, 0.3) 0%, transparent 70%);
}

.cta-section .container {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 760px;
}

.cta-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
}

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

/* ============================================
   页脚
   ============================================ */
.site-footer {
  background-color: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
}

.footer-brand .brand-logo {
  height: 24px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 20px;
  max-width: 320px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}

.footer-social a:hover {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   通用页面 Hero (内页)
   ============================================ */
.page-hero {
  padding: 72px 0 56px;
  background: linear-gradient(135deg, #001a36 0%, #00274f 100%);
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -10%;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(104, 202, 251, 0.18) 0%, transparent 70%);
  border-radius: 50%;
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 16px;
}

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

.breadcrumb .sep {
  opacity: 0.5;
}

.page-title {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  color: #ffffff;
}

.page-subtitle {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.78);
  max-width: 720px;
  line-height: 1.7;
}

@media (max-width: 768px) {
  .page-title {
    font-size: 30px;
  }
  .page-subtitle {
    font-size: 15px;
  }
}

/* ============================================
   下载中心
   ============================================ */
.download-tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.download-tab {
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  transition: var(--transition);
}

.download-tab.active,
.download-tab:hover {
  color: #ffffff;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-color: transparent;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}

.download-card {
  padding: 32px 28px;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.download-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.download-card-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  margin-bottom: 20px;
}

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

.download-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.download-card .version {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.download-card .size {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.download-card .btn {
  margin-top: auto;
}

@media (max-width: 960px) {
  .download-grid {
    grid-template-columns: 1fr;
  }
}

/* 系统要求 */
.sysreq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.sysreq-card {
  padding: 28px;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.sysreq-card h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.sysreq-card h3 .icon {
  color: var(--color-accent-dark);
  width: 20px;
  height: 20px;
}

.sysreq-list li {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 14px;
  border-bottom: 1px dashed var(--color-border);
}

.sysreq-list li:last-child {
  border-bottom: none;
}

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

.sysreq-list .val {
  color: var(--color-text);
  font-weight: 500;
}

@media (max-width: 768px) {
  .sysreq-grid {
    grid-template-columns: 1fr;
  }
}

/* 版本历史 */
.changelog {
  max-width: 820px;
  margin: 0 auto;
}

.changelog-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.changelog-version {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
}

.changelog-date {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.changelog-body h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text);
  margin: 12px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.changelog-body ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 8px;
}

.changelog-body ul li {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

@media (max-width: 640px) {
  .changelog-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

/* ============================================
   游戏库页面
   ============================================ */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.stat-box {
  text-align: center;
  padding: 32px 20px;
  background: linear-gradient(135deg, #ffffff 0%, var(--color-bg-alt) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.stat-box .num {
  font-size: 40px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-dark) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.stat-box .label {
  font-size: 14px;
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 游戏筛选标签 */
.game-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 32px;
}

.filter-chip {
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  transition: var(--transition);
  cursor: pointer;
}

.filter-chip:hover,
.filter-chip.active {
  color: #ffffff;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-dark) 100%);
  border-color: transparent;
}

/* 游戏列表 */
.games-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.game-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.game-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
}

.game-cover {
  height: 180px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-dark) 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.game-cover .game-letters {
  font-size: 56px;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.95);
  letter-spacing: 0.05em;
}

.game-cover .game-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 700;
  color: var(--color-primary-dark);
  background-color: var(--color-accent);
  border-radius: var(--radius-sm);
}

.game-info {
  padding: 20px;
}

.game-info h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.game-info .game-meta {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.game-info .game-desc {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

.compatibility {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--color-success);
  font-weight: 600;
}

.compatibility .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-success);
}

@media (max-width: 960px) {
  .games-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .games-list {
    grid-template-columns: 1fr;
  }
}

/* 分类网格 */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.category-card {
  padding: 24px 16px;
  text-align: center;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.category-card:hover {
  border-color: var(--color-accent);
  background-color: rgba(104, 202, 251, 0.05);
  transform: translateY(-2px);
}

.category-card .icon {
  width: 32px;
  height: 32px;
  color: var(--color-accent-dark);
  margin: 0 auto 12px;
}

.category-card h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.category-card .count {
  font-size: 12px;
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================
   教程页面
   ============================================ */
.tutorial-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: flex-start;
}

.tutorial-sidebar {
  position: sticky;
  top: 88px;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.tutorial-sidebar h4 {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  padding: 0 8px;
}

.tutorial-sidebar ul li a {
  display: block;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.tutorial-sidebar ul li a:hover,
.tutorial-sidebar ul li a.active {
  color: var(--color-primary);
  background-color: rgba(104, 202, 251, 0.1);
  font-weight: 600;
}

.tutorial-content {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.tutorial-content h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 32px 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.tutorial-content h2:first-child {
  margin-top: 0;
}

.tutorial-content h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin: 24px 0 12px;
}

.tutorial-content p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 16px;
}

.tutorial-content ul,
.tutorial-content ol {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 16px;
}

.tutorial-content ol {
  list-style: decimal;
}

.tutorial-content ul li,
.tutorial-content ol li {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 6px;
}

.tutorial-content code {
  font-family: "Courier New", "Consolas", monospace;
  background-color: rgba(104, 202, 251, 0.12);
  color: var(--color-primary);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 14px;
}

.tutorial-content pre {
  background-color: var(--color-primary-dark);
  color: #ffffff;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 16px 0 24px;
  font-size: 13px;
  line-height: 1.6;
}

.tutorial-content pre code {
  background-color: transparent;
  color: var(--color-accent);
  padding: 0;
}

.tutorial-content .note {
  padding: 16px 20px;
  background-color: rgba(104, 202, 251, 0.08);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  margin: 16px 0 24px;
}

.tutorial-content .note p {
  margin: 0;
  font-size: 14px;
  color: var(--color-text);
}

@media (max-width: 960px) {
  .tutorial-layout {
    grid-template-columns: 1fr;
  }
  .tutorial-sidebar {
    position: static;
  }
}

/* FAQ */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  background-color: #ffffff;
  transition: var(--transition);
}

.faq-item.open {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  text-align: left;
  cursor: pointer;
}

.faq-question .toggle {
  width: 20px;
  height: 20px;
  position: relative;
  flex-shrink: 0;
}

.faq-question .toggle::before,
.faq-question .toggle::after {
  content: "";
  position: absolute;
  background-color: var(--color-accent-dark);
  border-radius: 2px;
  transition: var(--transition);
}

.faq-question .toggle::before {
  top: 9px;
  left: 4px;
  right: 4px;
  height: 2px;
}

.faq-question .toggle::after {
  top: 4px;
  bottom: 4px;
  left: 9px;
  width: 2px;
}

.faq-item.open .faq-question .toggle::after {
  transform: rotate(90deg);
  opacity: 0;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 22px;
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 22px 18px;
}

.faq-answer p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================
   关于页面
   ============================================ */
.about-intro {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.about-intro p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 16px;
}

.about-stats-card {
  padding: 32px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.about-stats-card .stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.about-stats-card .stat-row:last-child {
  border-bottom: none;
}

.about-stats-card .key {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
}

.about-stats-card .val {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
}

@media (max-width: 960px) {
  .about-intro {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* 时间线 */
.timeline {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
  padding-left: 32px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 8px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%);
}

.timeline-item {
  position: relative;
  padding-bottom: 32px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid var(--color-accent);
  box-shadow: 0 0 0 4px rgba(104, 202, 251, 0.2);
}

.timeline-year {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent-dark);
  margin-bottom: 6px;
}

.timeline-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.timeline-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* 价值卡 */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.value-card {
  padding: 32px 24px;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
}

.value-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.value-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-dark) 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.value-card h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.value-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .values-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   下载弹窗
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 26, 54, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  padding: 20px;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
}
button { outline: none } 
.modal {
  background-color: #ffffff;
  border-radius: var(--radius-xl);
  max-width: 760px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.92);
  transition: transform 0.25s ease;
  position: relative;
  box-shadow: var(--shadow-xl);
}

.modal-overlay.open .modal {
  transform: scale(1);
}

.modal-header {
  padding: 28px 32px 20px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.modal-header h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.modal-header p {
  font-size: 14px;
  color: var(--color-text-muted);
}

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  background-color: var(--color-bg-alt);
  transition: var(--transition);
  flex-shrink: 0;
}

.modal-close:hover {
  background-color: var(--color-danger);
  color: #ffffff;
}

.modal-close .icon {
  width: 18px;
  height: 18px;
}

.modal-body {
  padding: 28px 32px 32px;
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}

.qr-card {
  padding: 24px;
  text-align: center;
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, #ffffff 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.qr-image {
  width: 180px;
  height: 180px;
  margin: 0 auto 14px;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
}

.qr-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-platform {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.qr-platform .icon {
  width: 18px;
  height: 18px;
  color: var(--color-accent-dark);
}

.qr-tip {
  font-size: 12px;
  color: var(--color-text-muted);
}

.modal-notice {
  padding: 14px 18px;
  background-color: rgba(104, 202, 251, 0.08);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--color-text);
  line-height: 1.6;
}

@media (max-width: 600px) {
  .qr-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .qr-image {
    width: 160px;
    height: 160px;
  }
  .modal-header,
  .modal-body {
    padding-left: 20px;
    padding-right: 20px;
  }
}

/* ============================================
   通用工具类
   ============================================ */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

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

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

@media (max-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}