:root {
  --bg: #FAF9FF;
  --card: #ffffff;
  --text: #1a1d2e;
  --muted: #5a6075;
  --accent: #766ee9;
  --accent-2: #4f8bff;
  --accent-3: #f5a94a;
  --border: rgba(118, 110, 233, 0.12);
}

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

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

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

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  gap: 20px;
}

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

.brand img {
  width: 190px;
  height: 45px;
}

.nav-links {
  display: flex;
  gap: 30px;
  font-size: 16px;
  color: var(--muted);
}

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

.primary-btn,
.secondary-btn,
.ghost-btn {
  border-radius: 999px;
  padding: 12px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.primary-btn {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #ffffff;
}

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

.ghost-btn {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(118, 110, 233, 0.2);
}

.primary-btn:hover,
.secondary-btn:hover,
.ghost-btn:hover {
  transform: translateY(-1px);
}

.hero {
  padding: 80px 0 80px;
  background-color: #fff;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 48px;
  align-items: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 6px;
  background: rgba(118, 110, 233, 0.1);
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2.2rem, 2.5vw + 1.6rem, 3.4rem);
  line-height: 1.15;
  margin-bottom: 16px;
}

.subtitle {
  color: var(--muted);
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.hero-meta {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  font-size: 0.9rem;
  color: var(--muted);
}

.hero-meta strong {
  display: block;
  font-size: 1.15rem;
  color: var(--text);
}

.hero-card {
  background: var(--card);
  border-radius: 24px;
  padding: 28px;
  border: 1px solid var(--border);
  box-shadow: 0 20px 40px rgba(23, 28, 60, 0.12);
}

.hero-illustration {
  width: 100%;
  border-radius: 18px;
  border: 1px solid var(--border);
  margin-bottom: 20px;
  box-shadow: 0 16px 30px rgba(118, 110, 233, 0.12);
}

.hero-picture {
  display: block;
  width: 100%;
}

.hero-picture .hero-illustration {
  width: 100%;
}

.platforms-illustration {
  width: 100%;
  border-radius: 18px;
}

.card-stack {
  display: grid;
  gap: 16px;
  margin-bottom: 24px;
}

.stack-item {
  padding: 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(118, 110, 233, 0.04);
}

.stack-item h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.stack-item p {
  color: var(--muted);
  font-size: 0.9rem;
}

.hero-title {
  font-weight: bold;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #0a2540, #4a3db3);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}


.section {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 2vw + 1.2rem, 2.6rem);
  margin-bottom: 12px;
}

.section-header p {
  color: var(--muted);
  font-size: 17px;
}

.grid-four {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.feature-card,
.plugin-card {
  background: var(--card);
  padding: 24px;
  border-radius: 20px;
  border: 1px solid var(--border);
  box-shadow: 0 18px 30px rgba(118, 110, 233, 0.1);
}

.feature-card img {
  width: 48px;
  height: 48px;
  margin-bottom: 14px;
}

.feature-card h3,
.plugin-card h3 {
  margin-bottom: 12px;
}

.feature-card p,
.plugin-card p {
  color: var(--muted);
  font-size: 0.95rem;
}

.plugin-card a {
  display: inline-block;
  margin-top: 16px;
  color: var(--accent);
  font-weight: 600;
}

.plugin-card img {
  width: 42px;
  height: 42px;
  margin-bottom: 12px;
}

.muted {
  background: rgba(118, 110, 233, 0.06);
}

.platforms-grid {
  display: grid;
  gap: 36px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: center;
}

.platform-list {
  display: grid;
  gap: 14px;
  margin-top: 20px;
  color: var(--muted);
}

.platform-list div {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 16px;
  border-radius: 14px;
  background: rgba(118, 110, 233, 0.06);
  border: 1px solid var(--border);
}

.platform-list a {
  color: var(--accent);
  font-weight: 600;
}

.qr-card {
  background: linear-gradient(135deg, rgba(118, 110, 233, 0.18), rgba(245, 169, 74, 0.18));
  border-radius: 24px;
  padding: 28px;
  border: 1px solid var(--border);
}

.qr-card h3 {
  margin-bottom: 8px;
}

.qr-card p {
  color: var(--muted);
  margin-bottom: 20px;
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
}

.qr-grid div {
  background: #ffffff;
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  border: 1px solid var(--border);
}

.qr-grid span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.85rem;
}

.gradient {
  background: radial-gradient(circle at top, rgba(118, 110, 233, 0.22), transparent 60%);
}

.support-grid {
  display: grid;
  gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: center;
}

.support-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.support-card {
  background: rgba(118, 110, 233, 0.05);
  border-radius: 20px;
  padding: 24px;
  border: 1px solid var(--border);
}

.social-links {
  display: flex;
  gap: 16px;
  margin: 16px 0 20px;
  flex-wrap: wrap;
}

.social-links a {
  color: var(--accent);
  font-weight: 600;
}

.wechat-trigger {
  position: relative;
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
}

.wechat-popover {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  background: #ffffff;
  padding: 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 12px 24px rgba(118, 110, 233, 0.18);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  width: 150px;
}

.wechat-popover img {
  width: 100%;
  height: auto;
  display: block;
}

.wechat-trigger:hover .wechat-popover {
  opacity: 1;
  pointer-events: auto;
}

.contact-block {
  padding: 14px;
  border-radius: 14px;
  background: rgba(118, 110, 233, 0.08);
  border: 1px solid var(--border);
  display: grid;
  gap: 6px;
}

.site-footer {
  padding: 60px 0 30px;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  gap: 28px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin-bottom: 30px;
  color: var(--muted);
}

.footer-grid h4 {
  color: var(--text);
  margin-bottom: 10px;
}

.footer-grid a {
  font-size: 14px;
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
}

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

.footer-grid img {
  height: 46px;
  margin-bottom: 12px;
}

.copyright {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 90px 0 60px;
  }

  .hero-card {
    padding: 20px;
  }

  .card-footer {
    flex-direction: column;
  }
}

/* 兼容性表格样式 */
.compatibility-section {
  background: var(--card);
}

.table-wrapper {
  overflow-x: auto;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--card);
  box-shadow: 0 18px 30px rgba(118, 110, 233, 0.08);
}

.compatibility-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 600px;
}

.compatibility-table th,
.compatibility-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.compatibility-table th {
  background: rgba(118, 110, 233, 0.05);
  font-weight: 600;
  color: var(--text);
  font-size: 0.95rem;
}

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

.compatibility-table tbody tr:hover {
  background: rgba(118, 110, 233, 0.02);
}

.compatibility-table td:first-child,
.compatibility-table th:first-child {
  font-weight: 600;
  color: var(--accent);
}

/* 移动端适配 */
@media (max-width: 640px) {
  .compatibility-table th,
  .compatibility-table td {
    padding: 12px 16px;
    font-size: 0.85rem;
  }
}

/* 常见问题模块样式 */
#faq {
  background: var(--card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  margin-top: 32px;
}

.faq-category {
  background: rgba(118, 110, 233, 0.02);
  border-radius: 24px;
  padding: 24px;
  border: 1px solid var(--border);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.faq-category:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 30px rgba(118, 110, 233, 0.08);
}

.faq-category-title {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
  color: var(--text);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.faq-item {
  border-left: 3px solid rgba(118, 110, 233, 0.3);
  padding-left: 16px;
}

.faq-question {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--text);
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.faq-question::before {
  content: "Q";
  font-weight: 700;
  font-size: 0.85rem;
  background: var(--accent);
  color: white;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  flex-shrink: 0;
}

.faq-answer {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
  word-break: break-word;
  white-space: normal;
}

.faq-answer br {
  margin-bottom: 6px;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .faq-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .faq-category {
    padding: 20px;
  }

  .faq-category-title {
    font-size: 1.2rem;
  }
}

/* 关键词标签组样式 */
.keyword-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
  margin-bottom: 8px;
}

.keyword-tag {
  display: inline-block;
  background: rgba(118, 110, 233, 0.05);
  color: var(--accent);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  cursor: default;
  backdrop-filter: blur(2px);
}

.keyword-tag:hover {
  background: rgba(118, 110, 233, 0.2);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(118, 110, 233, 0.15);
}

/* ========================================
   优化：产品优势 Section
   ======================================== */

/* — 区块背景，制造与前后模块的分区感 — */
.features-section {
  position: relative;
  background:
    radial-gradient(ellipse 60% 50% at 20% 0%, rgba(118,110,233,.08) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 80% 100%, rgba(79,139,255,.06) 0%, transparent 70%),
    var(--bg);
  overflow: hidden;
}

/* 装饰光晕 */
.features-section::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -80px;
  width: 340px;
  height: 340px;
  background: radial-gradient(circle, rgba(245,169,74,.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

/* — Section 标签（新增小标签） — */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(118,110,233,.12), rgba(79,139,255,.10));
  color: var(--accent);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .02em;
  margin-bottom: 14px;
}

/* — 描述文字 — */
.section-desc {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto 8px;
  line-height: 1.7;
}

/* — 关键词标签组：更精致的胶囊 — */
.features-section .keyword-tags {
  gap: 10px;
  margin-top: 22px;
  margin-bottom: 0;
}

.features-section .keyword-tag {
  position: relative;
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  background: rgba(118,110,233,.06);
  border: 1px solid rgba(118,110,233,.12);
  backdrop-filter: blur(4px);
  cursor: default;
  transition: all .25s ease;
}

.features-section .keyword-tag:hover {
  background: linear-gradient(135deg, rgba(118,110,233,.16), rgba(79,139,255,.12));
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow:
    0 6px 16px rgba(118,110,233,.14),
    inset 0 0 0 1px rgba(255,255,255,.5);
}

/* — Feature Card — */
.features-section .feature-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: var(--card);
  padding: 32px 28px 28px;
  border-radius: 24px;
  border: 1px solid var(--border);
  box-shadow:
    0 2px 8px rgba(118,110,233,.04),
    0 16px 40px rgba(118,110,233,.08);
  transition:
    transform .3s cubic-bezier(.22,1,.36,1),
    box-shadow .3s cubic-bezier(.22,1,.36,1),
    border-color .3s ease;
  overflow: hidden;
}

/* 顶部装饰线 */
.features-section .feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 28px;
  right: 28px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: opacity .3s ease;
}

.features-section .feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(118,110,233,.28);
  box-shadow:
    0 8px 20px rgba(118,110,233,.10),
    0 28px 56px rgba(118,110,233,.14);
}

.features-section .feature-card:hover::before {
  opacity: 1;
}

/* — 图标容器（彩色底衬） — */
.feature-icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  margin-bottom: 10px;
  transition: transform .3s ease, background .3s ease;
}

.features-section .feature-card:hover .feature-icon-wrap {
  transform: scale(1.08);
}

.feature-icon-wrap img {
  width: 130px;
  height: 130px;
  object-fit: contain;
}

/* — 卡片文字 — */
.features-section .feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.35;
}

.features-section .feature-card p {
  color: var(--muted);
  font-size: .92rem;
  line-height: 1.7;
}

/* — 角标序号 — */
.feature-index {
  position: absolute;
  bottom: 20px;
  right: 24px;
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, rgba(118,110,233,.10), rgba(79,139,255,.06));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  user-select: none;
  pointer-events: none;
  transition: -webkit-text-fill-color .3s ease;
}

.features-section .feature-card:hover .feature-index {
  background: linear-gradient(135deg, rgba(118,110,233,.22), rgba(79,139,255,.14));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* — 入场动画（可选手动加 JS 触发） — */
.features-section .feature-card {
  opacity: 0;
  transform: translateY(24px);
  animation: featureFadeUp .6s cubic-bezier(.22,1,.36,1) forwards;
}
.features-section .feature-card:nth-child(1) { animation-delay: .05s; }
.features-section .feature-card:nth-child(2) { animation-delay: .15s; }
.features-section .feature-card:nth-child(3) { animation-delay: .25s; }
.features-section .feature-card:nth-child(4) { animation-delay: .35s; }

@keyframes featureFadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* — 响应式适配 — */
@media (max-width: 900px) {
  .features-section .grid-four {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

@media (max-width: 640px) {
  .features-section .grid-four {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .features-section .feature-card {
    padding: 26px 22px 24px;
  }
  .feature-index {
    font-size: 1.6rem;
  }
  .features-section .keyword-tag {
    font-size: 12px;
    padding: 7px 14px;
  }
}

/* ========================================
   优化：多端覆盖 / Platforms Section
   ======================================== */

/* — 区块背景 — */
.platforms-section {
  position: relative;
  padding: 100px 0;
  background:
    radial-gradient(ellipse 50% 60% at 15% 20%, rgba(118, 110, 233, .06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 50% at 85% 80%, rgba(79, 139, 255, .05) 0%, transparent 70%),
    var(--bg);
  overflow: hidden;
}

/* 装饰光晕 */
.platforms-section__orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(60px);
}
.platforms-section__orb--left {
  top: -80px;
  left: -100px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(118, 110, 233, .10) 0%, transparent 70%);
}
.platforms-section__orb--right {
  bottom: -60px;
  right: -80px;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(245, 169, 74, .09) 0%, transparent 70%);
}

/* — 平台徽章组 — */
.platform-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
}
.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 999px;
  background: rgba(118, 110, 233, .05);
  color: var(--accent);
  font-size: .85rem;
  font-weight: 600;
  border: 1px solid rgba(118, 110, 233, .10);
  backdrop-filter: blur(4px);
  transition: all .25s ease;
}
.platform-badge svg {
  opacity: .7;
  transition: opacity .25s ease;
}
.platform-badge:hover {
  background: rgba(118, 110, 233, .14);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(118, 110, 233, .12);
}
.platform-badge:hover svg {
  opacity: 1;
}

/* — 增强版主网格 — */
.platforms-grid--enhanced {
  gap: 40px;
  align-items: stretch;
}

/* — 插图卡片 — */
.illustration-frame {
  position: relative;
  border-radius: 24px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  opacity: 0;
  transform: translateY(24px);
  animation: platformsFadeUp .7s cubic-bezier(.22, 1, .36, 1) forwards;
  animation-delay: .1s;
}
.illustration-frame .platforms-illustration {
  border-radius: 16px;
  border: none;
  box-shadow: none;
}
/* 右下角徽章 */
.illustration-frame__badge {
  position: absolute;
  bottom: 32px;
  right: 32px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  color: var(--text);
  font-size: .82rem;
  font-weight: 600;
  box-shadow:
    0 4px 16px rgba(118, 110, 233, .12),
    0 1px 3px rgba(0, 0, 0, .06);
  border: 1px solid rgba(118, 110, 233, .10);
}
.illustration-frame__badge svg {
  color: #22c55e;
}

/* — 增强版 QR 卡片 — */
.qr-card--enhanced {
  position: relative;
  background:
    linear-gradient(
      135deg,
      rgba(118, 110, 233, .08) 0%,
      rgba(79, 139, 255, .06) 50%,
      rgba(245, 169, 74, .06) 100%
    );
  border-radius: 28px;
  padding: 32px;
  border: 1px solid rgba(118, 110, 233, .12);
  backdrop-filter: blur(16px);
  box-shadow:
    0 2px 8px rgba(118, 110, 233, .04),
    0 24px 56px rgba(118, 110, 233, .10);
  display: flex;
  flex-direction: column;
  gap: 24px;
  opacity: 0;
  transform: translateY(24px);
  animation: platformsFadeUp .7s cubic-bezier(.22, 1, .36, 1) forwards;
  animation-delay: .25s;
  transition: transform .35s cubic-bezier(.22, 1, .36, 1),
              box-shadow .35s cubic-bezier(.22, 1, .36, 1);
}
.qr-card--enhanced:hover {
  transform: translateY(-4px);
  box-shadow:
    0 8px 24px rgba(118, 110, 233, .10),
    0 32px 64px rgba(118, 110, 233, .14);
}

/* QR 卡片 - 头部 */
.qr-card__header {
  display: flex;
  align-items: center;
  gap: 16px;
}
.qr-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  color: #fff;
}
.qr-card__header h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0px;
}
.qr-card__header p {
  color: var(--muted);
  font-size: .9rem;
}

/* QR 卡片 - 网格 */
.qr-grid--enhanced {
  gap: 8px;
}
.qr-item {
  display: flex;
  align-items: center;
  flex-direction: column;
  gap: 8px;
  border-radius: 20px;
}
.qr-item:hover {
  transform: translateY(-2px);
}
.qr-item__img-wrap {
  width: 200px;
  height: 200px;
  border-radius: 14px;
  overflow: hidden;
  flex-shrink: 0;
}
.qr-item__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.qr-item__info {
  display: flex;
  flex-direction: column;
}
.qr-item__title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--text);
}
.qr-item__sub {
  font-size: .8rem;
  color: var(--muted);
}

/* QR 卡片 - 底部提示 */
.qr-card__footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 14px;
  background: rgba(118, 110, 233, .06);
  color: var(--muted);
  font-size: .82rem;
  border: 1px solid rgba(118, 110, 233, .08);
}
.qr-card__footer svg {
  color: var(--accent);
  flex-shrink: 0;
}

/* — 入场动画 — */
@keyframes platformsFadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* — 徽章组入场 — */
.platforms-section .platform-badges .platform-badge {
  opacity: 0;
  transform: translateY(12px);
  animation: badgePop .5s cubic-bezier(.22, 1, .36, 1) forwards;
}
.platforms-section .platform-badges .platform-badge:nth-child(1) { animation-delay: .15s; }
.platforms-section .platform-badges .platform-badge:nth-child(2) { animation-delay: .25s; }
.platforms-section .platform-badges .platform-badge:nth-child(3) { animation-delay: .35s; }
.platforms-section .platform-badges .platform-badge:nth-child(4) { animation-delay: .45s; }

@keyframes badgePop {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* — 响应式 — */
@media (max-width: 900px) {
  .platforms-grid--enhanced {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .illustration-frame {
    order: 2;
  }
  .qr-card--enhanced {
    order: 1;
  }
}

@media (max-width: 640px) {
  .platforms-section {
    padding: 80px 0 60px;
  }
  .qr-card--enhanced {
    padding: 24px;
    border-radius: 22px;
  }
  .qr-item {
    padding: 12px;
    gap: 12px;
  }
  .qr-item__img-wrap {
    width: 68px;
    height: 68px;
    border-radius: 12px;
  }
  .illustration-frame {
    padding: 14px;
  }
  .illustration-frame__badge {
    bottom: 22px;
    right: 22px;
    padding: 8px 14px;
    font-size: .76rem;
  }
  .platform-badges {
    gap: 8px;
  }
  .platform-badge {
    padding: 8px 14px;
    font-size: .78rem;
  }
}

/* ==================== Footer 布局增强 ==================== */
.footer-grid {
    display: grid;
    /* 列宽改为 auto，不再撑满空间；Logo稍宽一点 */
    grid-template-columns: 80px auto auto auto auto;
    justify-content: center; /* 核心：整个网格横向居中 */
    gap: 32px 120px; /* 行间距 32px，列间距 48px */
}

.footer-brand {
    display: flex;
    justify-content: center;
}

/* 响应式：小屏幕下回退为两列布局，Logo居中独占一行 */
@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: auto auto; /* 小屏两列自适应 */
        gap: 24px;
        text-align: center; /* 小屏下文字居中更美观 */
    }
    .footer-brand {
        grid-column: 1 / -1; /* Logo独占整行 */
        justify-content: center;
    }
}