/* ==========================================================
   秀世界干货箱 · 前台样式
   还原原站视觉：蓝灰主色 / 渐变分区 / 卡片网格 / 响应式
   ========================================================== */

:root {
  --primary-color: #4a5568;
  --primary-light: #718096;
  --primary-dark: #2d3748;
  --secondary-color: #6c757d;
  --success-color: #28a745;
  --warning-color: #ffc107;
  --danger-color: #dc3545;
  --info-color: #17a2b8;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-light: #adb5bd;
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --border-color: #dee2e6;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, .08);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, .12);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, .15);
  --shadow-xl: 0 12px 24px rgba(0, 0, 0, .18);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition-fast: .2s ease;
  --transition-normal: .3s ease;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  min-height: 100vh;
  background: linear-gradient(135deg, #f5f7fa, #e4e8ec);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; color: var(--text-primary); }
a { color: var(--primary-color); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--primary-light); }
button, input, textarea, select { font-family: inherit; }
button { cursor: pointer; border: none; outline: none; transition: all var(--transition-fast); }
img { border: 0; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--secondary-color); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

.app { min-height: 100vh; display: flex; flex-direction: column; }
.main { flex: 1; width: 100%; }

/* ---------------- 顶部导航 ---------------- */
.main-nav {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  box-shadow: 0 4px 12px rgba(0, 0, 0, .1);
  position: sticky; top: 0; z-index: 1000;
}
.nav-container {
  display: flex; align-items: center; gap: 1rem;
  padding: .85rem 2rem; max-width: 1200px; margin: 0 auto; width: 100%;
}
.nav-left { flex: 1; min-width: 190px; }
.nav-center { text-align: center; flex: 0 0 auto; }
.nav-right { flex: 1; display: flex; justify-content: flex-end; }
.nav-logo h1 { color: #fff; font-size: 1.7rem; font-weight: 800; margin: 0; text-shadow: 0 2px 4px rgba(0,0,0,.2); white-space: nowrap; }
.nav-links { display: flex; gap: .6rem; align-items: center; justify-content: center; flex-wrap: wrap; }
.nav-link {
  color: rgba(255,255,255,.9); font-size: .95rem; font-weight: 600;
  padding: .45rem .85rem; border-radius: 8px; position: relative; white-space: nowrap;
}
.nav-link:hover, .nav-link.active { background: rgba(255,255,255,.18); color: #fff; }
.nav-link.active::after {
  content: ""; position: absolute; left: 20%; right: 20%; bottom: 2px;
  height: 2px; background: #fff; border-radius: 2px;
}
.nav-quick { display: flex; gap: .5rem; }
.nav-quick a {
  color: #fff; background: rgba(255,255,255,.14); padding: .4rem .8rem;
  border-radius: 8px; font-size: .85rem; font-weight: 600;
}
.nav-quick a:hover { background: rgba(255,255,255,.28); }

/* 顶部快捷条（详情页） */
.fixed-nav {
  position: sticky; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; justify-content: space-between; align-items: center;
  padding: .8rem 2rem; background: rgba(255,255,255,.95);
  backdrop-filter: blur(10px); box-shadow: 0 2px 12px rgba(0,0,0,.1);
}
.nav-group { display: flex; align-items: center; gap: .75rem; }
.nav-btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .55rem 1.1rem; border-radius: 8px; font-size: .95rem;
  font-weight: 600; color: #fff;
}
.back-btn { background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)); }
.home-btn { background: linear-gradient(135deg, var(--info-color), #138496); }
.refresh-btn { background: linear-gradient(135deg, #6c757d, #495057); }
.favorite-btn { background: linear-gradient(135deg, #ffc107, #fd7e14); color: #1a1a1a; }
.admin-btn { background: linear-gradient(135deg, #6f42c1, #5a2ca0); }
.nav-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,.2); color: #fff; }
.favorite-btn:hover { color: #1a1a1a; }
.btn-icon { font-size: 1.05rem; }

/* ---------------- 搜索 ---------------- */
.search-section {
  padding: 1.6rem 2rem;
  background: linear-gradient(135deg, #4a5568 0%, #2d3748 100%);
  border-bottom: 1px solid rgba(255,255,255,.15);
}
.search-container { max-width: 760px; margin: 0 auto; }
.search-box {
  display: flex; align-items: center; background: rgba(255,255,255,.18);
  border-radius: var(--radius-lg); padding: .65rem 1.1rem;
  border: 2px solid rgba(255,255,255,.3); transition: all .3s ease;
}
.search-box:focus-within { border-color: #fff; box-shadow: 0 0 0 3px rgba(255,255,255,.2); background: rgba(255,255,255,.25); }
.search-icon { font-size: 1.1rem; margin-right: .7rem; opacity: .9; color: #fff; }
.search-input {
  flex: 1; border: none; background: transparent; font-size: .95rem;
  color: #fff; outline: none; min-width: 0;
}
.search-input::placeholder { color: rgba(255,255,255,.7); }
.clear-btn {
  background: rgba(255,255,255,.3); color: #fff; width: 1.5rem; height: 1.5rem;
  border-radius: 50%; display: none; align-items: center; justify-content: center;
  font-size: .8rem;
}
.clear-btn.show { display: inline-flex; }
.clear-btn:hover { background: rgba(255,255,255,.5); }
.search-info { text-align: center; padding: .55rem 0 0; color: rgba(255,255,255,.9); font-size: .9rem; }
.search-results-section { padding: 1.5rem 2rem 2rem; }
.search-results-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem; max-width: 1200px; margin: 0 auto;
}
.software-meta { display: flex; gap: .5rem; flex-wrap: wrap; justify-content: flex-start; margin-top: .35rem; }
.os-badge, .category-badge { padding: .2rem .6rem; border-radius: 10px; font-size: .7rem; font-weight: 600; }
.os-badge.windows { background: linear-gradient(135deg,#0078d4,#005a9e); color:#fff; }
.os-badge.macos { background: linear-gradient(135deg,#6c757d,#495057); color:#fff; }
.os-badge.linux { background: linear-gradient(135deg,#228b22,#006400); color:#fff; }
.category-badge { background: var(--bg-tertiary); color: var(--text-secondary); }
.no-results { text-align: center; color: var(--text-secondary); padding: 3rem 1rem; }
.no-results-icon { font-size: 4rem; display: block; margin-bottom: 1rem; opacity: .5; }
.no-results h3 { font-size: 1.5rem; color: var(--text-primary); margin-bottom: .5rem; }

/* ---------------- 区块容器 ---------------- */
.section-container {
  margin: 2rem 1.5rem; padding: 2rem; background: var(--bg-primary);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition-normal);
}
.section-container:hover { box-shadow: var(--shadow-lg); }
.section-header { text-align: center; margin-bottom: 2rem; padding-bottom: 1.5rem; border-bottom: 2px solid var(--primary-color); }
.section-header h2 {
  font-size: 2rem; font-weight: 700; margin-bottom: .5rem;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: var(--primary-color);
}
.section-header p { font-size: 1.05rem; color: var(--text-secondary); }
.section-anchor { scroll-margin-top: 80px; }

/* 平台分区 */
.os-section-container {
  margin: 1.5rem; background: var(--bg-primary); border-radius: var(--radius-xl);
  overflow: hidden; box-shadow: var(--shadow-md); transition: box-shadow var(--transition-normal);
}
.os-section-container:hover { box-shadow: var(--shadow-lg); }
.os-section-header {
  display: flex; align-items: center; gap: 1rem; padding: 1.1rem 1.5rem;
  background: var(--bg-secondary); border-bottom: 1px solid var(--border-color); color: #fff;
}
.os-section-header.windows { background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)); }
.os-section-header.macos { background: linear-gradient(135deg, #6c757d, #495057); }
.os-section-header.linux { background: linear-gradient(135deg, #228b22, #006400); }
.os-section-header.resources { background: linear-gradient(135deg, #fd7e14, #e8590c); }
.os-section-header h2 { font-size: 1.4rem; font-weight: 700; color: #fff; margin: 0; }
.os-icon { font-size: 2rem; animation: float 3s ease-in-out infinite; }
/* 平台图标也可以填站内图片路径，尺寸跟随 .os-icon 的字号 */
.os-icon .os-icon-img {
  width: 1.15em; height: 1.15em; object-fit: contain;
  display: inline-block; vertical-align: -.18em;
}
.os-count { margin-left: auto; font-size: .9rem; color: rgba(255,255,255,.85); }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }

/* 分类 */
.category-sections { padding: 1.2rem 1.5rem; }
.category-section { margin-bottom: 1.6rem; }
.category-section:last-child { margin-bottom: 0; }
.category-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1rem; padding-bottom: .6rem;
  border-bottom: 2px solid var(--primary-color); position: relative;
}
.category-header::after {
  content: ""; position: absolute; bottom: -2px; left: 0; width: 50px; height: 2px;
  background: var(--primary-light); border-radius: 2px;
}
.category-header h3 { font-size: 1.2rem; font-weight: 700; }
.category-count {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: #fff; padding: .35rem .8rem; border-radius: 15px; font-size: .8rem; font-weight: 600;
}
.software-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }
.software-card {
  display: flex; align-items: center; gap: 1rem; background: var(--bg-primary);
  padding: 1.1rem; border-radius: var(--radius-md); cursor: pointer;
  transition: all var(--transition-normal); box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color); position: relative; overflow: hidden; text-align: left;
  color: inherit; min-width: 0;
}
.software-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  transform: scaleX(0); transition: transform var(--transition-normal);
}
.software-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); color: inherit; }
.software-card:hover::before { transform: scaleX(1); }
.software-icon {
  font-size: 2.2rem; flex-shrink: 0; display: flex; align-items: center; justify-content: center;
  width: 3rem; height: 3rem; border-radius: 10px; background: var(--bg-secondary);
  transition: transform var(--transition-normal); filter: drop-shadow(0 2px 4px rgba(0,0,0,.1));
  overflow: hidden;
}
.software-icon img { max-width: 100%; max-height: 100%; object-fit: contain; }
.software-card:hover .software-icon { transform: scale(1.1); }
.software-info { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.software-card h3 { font-size: 1.05rem; margin-bottom: .25rem; font-weight: 600; }
.software-card:hover h3 { color: var(--primary-color); }
.software-description {
  color: var(--text-secondary); line-height: 1.4; font-size: .85rem;
  display: -webkit-box; -webkit-line-clamp: 1; line-clamp: 1;
  -webkit-box-orient: vertical; overflow: hidden;
}
.version-count {
  background: linear-gradient(135deg, var(--info-color), #138496); color: #fff;
  padding: .2rem .65rem; border-radius: 12px; font-size: .7rem; font-weight: 600;
  align-self: flex-start; margin-top: .45rem;
}
.direct-link-badge { position: absolute; top: .5rem; right: .6rem; font-size: .9rem; opacity: .6; }
.software-card:hover .direct-link-badge { opacity: 1; transform: scale(1.2); }

/* 资源站卡片 */
.resources-grid {
  padding: 1.5rem; display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem;
}
.resource-card {
  display: flex; align-items: center; gap: 1rem; background: var(--bg-primary);
  padding: 1.2rem; border-radius: var(--radius-md); border: 1px solid var(--border-color);
  text-decoration: none; transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm); position: relative; overflow: hidden; color: inherit;
}
.resource-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg,#fd7e14,#e8590c); transform: scaleX(0);
  transition: transform var(--transition-normal);
}
.resource-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: #fd7e14; color: inherit; }
.resource-card:hover::before { transform: scaleX(1); }
.resource-icon { font-size: 2.4rem; flex-shrink: 0; transition: transform var(--transition-normal); }
.resource-card:hover .resource-icon { transform: scale(1.1); }
.resource-info { flex: 1; min-width: 0; }
.resource-info h3 { font-size: 1.1rem; margin: 0 0 .3rem; font-weight: 600; }
.resource-card:hover .resource-info h3 { color: #fd7e14; }
.resource-info p { color: var(--text-secondary); font-size: .85rem; margin: 0; }
.resource-arrow { font-size: 1.5rem; color: var(--text-secondary); transition: all var(--transition-normal); }
.resource-card:hover .resource-arrow { color: #fd7e14; transform: translateX(5px); }
.resource-host { display: inline-block; margin-top: .35rem; font-size: .72rem; color: var(--text-light); word-break: break-all; }
.resource-card:active { transform: translateY(-1px) scale(.995); box-shadow: var(--shadow-md); border-color: #fd7e14; }
.resource-card:focus-visible { outline: 2px solid #fd7e14; outline-offset: 2px; }

/* 外链兜底提示（新标签页被拦截 / 预览面板内） */
.ext-fallback {
  position: fixed; inset: 0; z-index: 3000; display: none;
  align-items: center; justify-content: center; padding: 1rem;
  background: rgba(15, 23, 42, .5); backdrop-filter: blur(3px);
}
.ext-fallback.show { display: flex; }
.ext-fallback-inner {
  width: 100%; max-width: 480px; background: var(--bg-primary); color: var(--text-primary);
  border-radius: 14px; padding: 1.3rem 1.5rem; box-shadow: 0 18px 40px rgba(0, 0, 0, .28);
}
.ext-fallback-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: .6rem; }
.ext-fallback-head strong { font-size: 1.05rem; }
.ext-close { background: none; border: 0; font-size: 1.6rem; line-height: 1; color: var(--text-secondary); cursor: pointer; }
.ext-fallback p { font-size: .88rem; color: var(--text-secondary); margin-bottom: .8rem; }
.ext-open {
  display: block; padding: .65rem .9rem; border-radius: 8px; font-weight: 600;
  background: #fd7e14; color: #fff !important; word-break: break-all;
}
.ext-open:hover { background: #e8590c; }
.ext-url {
  margin-top: .7rem; padding: .6rem .75rem; border: 1px solid var(--border-color);
  border-radius: 8px; background: var(--bg-secondary); font-size: .8rem;
  color: var(--text-secondary); word-break: break-all; user-select: all;
}
.ext-actions { display: flex; align-items: center; gap: .8rem; margin-top: .8rem; }
.ext-copy {
  padding: .45rem 1rem; border: 0; border-radius: 8px; cursor: pointer;
  background: var(--primary-color); color: #fff; font-weight: 600; font-size: .85rem;
}
.ext-copy:hover { background: var(--primary-dark); }
.ext-tip { font-size: .8rem; color: var(--success-color); }

/* 文章专区 */
.blog-container { background: var(--bg-secondary); border-radius: var(--radius-lg); padding: 2rem; }
.article-category-section { margin-bottom: 2rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border-color); }
.article-category-section:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }
.article-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; }
.article-card {
  background: var(--bg-primary); border-radius: var(--radius-md); padding: 1.5rem;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border-color);
  transition: all var(--transition-normal); display: flex; flex-direction: column;
}
.article-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.article-info { margin-bottom: 1.2rem; flex: 1; }
.article-info h4 { font-size: 1.1rem; font-weight: 600; margin-bottom: .5rem; }
.article-description { color: var(--text-secondary); font-size: .9rem; line-height: 1.4; }
.article-downloads h5 { font-size: .9rem; font-weight: 600; margin-bottom: .8rem; }
.download-links { display: flex; flex-direction: column; gap: .5rem; }
.download-link {
  display: inline-block; padding: .6rem 1rem;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: #fff !important; text-decoration: none; border-radius: var(--radius-md);
  font-size: .85rem; font-weight: 600; text-align: center;
  transition: all var(--transition-normal); box-shadow: 0 2px 8px rgba(0,120,212,.2);
}
.download-link:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,120,212,.4); background: linear-gradient(135deg, var(--primary-dark), var(--primary-color)); }
.download-link .password { font-size: .75rem; opacity: .85; margin-left: .3rem; }
.empty-placeholder { text-align: center; color: var(--text-secondary); padding: 3rem 1rem; }
.empty-placeholder .tips-icon { font-size: 3.5rem; margin-bottom: 1rem; animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .6; transform: scale(1.08); } }

/* ---------------- 软件详情页 ---------------- */
.software-detail { width: 100%; min-height: 100%; padding-bottom: 2rem; }
.software-info { max-width: 960px; margin: 0 auto; padding: 0 2rem; }
.software-header {
  margin-top: 2rem; display: flex; align-items: center; gap: 2rem; margin-bottom: 2rem;
  padding: 2.5rem; background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
  border-radius: var(--radius-xl); box-shadow: var(--shadow-md); border: 1px solid var(--border-color);
}
.software-icon-large {
  font-size: 4rem; flex-shrink: 0; width: 6rem; height: 6rem; display: flex;
  align-items: center; justify-content: center; background: #fff; border-radius: var(--radius-lg);
  animation: float 3s ease-in-out infinite; box-shadow: var(--shadow-sm); overflow: hidden;
}
.software-icon-large img { max-width: 100%; max-height: 100%; object-fit: contain; }
.software-title-section h1 {
  font-size: 2.2rem; margin-bottom: .8rem; font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: var(--primary-color);
}
.software-category {
  color: var(--text-secondary); font-size: 1rem; background: var(--bg-primary);
  padding: .5rem 1rem; border-radius: var(--radius-sm); display: inline-block; box-shadow: var(--shadow-sm);
}
.software-description-full {
  color: var(--text-secondary); line-height: 1.8; font-size: 1.05rem; margin-bottom: 2rem;
  padding: 1.5rem 2rem; background: var(--bg-secondary); border-radius: var(--radius-lg);
  border-left: 4px solid var(--primary-color); box-shadow: var(--shadow-sm);
}
.home-promo-card, .direct-link-card {
  display: flex; align-items: center; gap: 1.5rem; padding: 1.6rem 2rem;
  border-radius: var(--radius-lg); color: #fff; margin-bottom: 2rem;
  box-shadow: var(--shadow-md); transition: all var(--transition-normal); text-decoration: none;
}
.home-promo-card { background: linear-gradient(135deg, var(--primary-color), var(--primary-light)); }
.direct-link-card { background: linear-gradient(135deg, #28a745, #20c997); }
.home-promo-card:hover, .direct-link-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-xl); color: #fff; }
.promo-icon, .direct-link-icon { font-size: 2.6rem; flex-shrink: 0; transition: transform var(--transition-normal); }
.home-promo-card:hover .promo-icon, .direct-link-card:hover .direct-link-icon { transform: scale(1.1) rotate(5deg); }
.promo-body { flex: 1; }
.promo-body strong { display: block; font-size: 1.15rem; }
.promo-body span { font-size: .9rem; opacity: .9; }
.promo-arrow, .direct-link-arrow { font-size: 1.6rem; transition: transform var(--transition-normal); }
.home-promo-card:hover .promo-arrow, .direct-link-card:hover .direct-link-arrow { transform: translateX(5px); }
.versions-title {
  color: var(--text-primary); font-size: 1.8rem; margin: 2rem 0 1.5rem; font-weight: 700;
  position: relative; padding-bottom: 1rem;
}
.versions-title::after {
  content: ""; position: absolute; bottom: 0; left: 0; width: 80px; height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light)); border-radius: 2px;
}
.versions-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.2rem; margin-bottom: 2rem; }
.version-card {
  background: var(--bg-primary); padding: 1.8rem; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); border: 2px solid transparent; position: relative; overflow: hidden;
  display: flex; flex-direction: column; gap: .6rem;
  transition: all var(--transition-normal);
}
.version-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  transform: scaleX(0); transition: transform var(--transition-normal);
}
.version-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); border-color: var(--primary-light); }
.version-card:hover::before { transform: scaleX(1); }
.version-icon { font-size: 2.2rem; }
.version-card h3 { font-size: 1.2rem; }
.version-meta { color: var(--text-secondary); font-size: .85rem; }
.view-tutorial { color: var(--info-color); font-weight: 600; font-size: .9rem; margin-top: auto; }

.download-section { margin-top: 2rem; }
.download-title { color: var(--text-primary); font-size: 1.6rem; margin-bottom: 1.2rem; font-weight: 700; text-align: center; }
.download-buttons { display: flex; flex-direction: column; gap: 1rem; }
.download-row { display: flex; gap: .8rem; align-items: stretch; flex-wrap: wrap; }
.download-btn {
  flex: 1; min-width: 240px; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1.2rem 1.6rem; background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: #fff; text-decoration: none; border-radius: var(--radius-lg); font-size: 1.02rem;
  font-weight: 600; box-shadow: var(--shadow-md); transition: all var(--transition-normal);
}
.download-btn:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); color: #fff; }
.download-icon { font-size: 1.4rem; animation: bounce 2s ease-in-out infinite; }
@keyframes bounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-4px); } }
.download-platform { background: rgba(255,255,255,.18); padding: .35rem .9rem; border-radius: var(--radius-sm); font-size: .9rem; }
.download-pass { background: rgba(255,255,255,.22); padding: .3rem .6rem; border-radius: var(--radius-sm); font-size: .9rem; }
.download-pass.no-pass { opacity: .8; }

/* 文章详情页 */
.article-detail { max-width: 900px; margin: 0 auto; padding: 2rem; }
.blog-header { margin-bottom: 2rem; text-align: center; }
.blog-header h1 {
  font-size: 2.2rem; margin-bottom: 1rem; font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: var(--primary-color);
}
.blog-meta { display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }
.meta-item {
  display: flex; align-items: center; gap: .5rem; color: var(--text-secondary);
  font-size: .95rem; background: var(--bg-primary); padding: .5rem 1rem;
  border-radius: var(--radius-sm); box-shadow: var(--shadow-sm);
}
.blog-content {
  background: var(--bg-primary); border-radius: var(--radius-xl); padding: 2.2rem;
  box-shadow: var(--shadow-md); border: 1px solid var(--border-color); margin-bottom: 2rem;
}
.markdown-renderer { font-size: 1.02rem; line-height: 1.9; color: #343a40; }
.markdown-renderer h1, .markdown-renderer h2, .markdown-renderer h3 { margin: 1.6rem 0 .8rem; }
.markdown-renderer h2 { font-size: 1.5rem; border-bottom: 2px solid var(--bg-tertiary); padding-bottom: .5rem; }
.markdown-renderer h3 { font-size: 1.25rem; }
.markdown-renderer p { margin: .7rem 0; }
.markdown-renderer ul { padding-left: 1.6rem; margin: .7rem 0; }
.markdown-renderer code { background: var(--bg-tertiary); padding: .1rem .4rem; border-radius: 4px; font-size: .9em; }
.markdown-renderer pre { background: #1e2430; color: #e9ecef; padding: 1rem 1.2rem; border-radius: 10px; overflow-x: auto; margin: 1rem 0; }
.markdown-renderer pre code { background: none; color: inherit; padding: 0; }
.markdown-renderer a { color: #0078d4; text-decoration: underline; }

/* ---------- 所见即所得编辑器保存的富文本正文 ---------- */
.rich-renderer h1 { font-size: 1.9rem; margin: 1.8rem 0 .9rem; }
.rich-renderer h4 { font-size: 1.12rem; margin: 1.2rem 0 .6rem; }
.rich-renderer h5, .rich-renderer h6 { font-size: 1rem; margin: 1rem 0 .5rem; }
.rich-renderer ol { padding-left: 1.6rem; margin: .7rem 0; }
.rich-renderer li { margin: .25rem 0; }
.rich-renderer blockquote {
  border-left: 4px solid #17a2b8; background: var(--bg-tertiary); color: var(--text-secondary);
  padding: .8rem 1.1rem; margin: 1rem 0; border-radius: 0 8px 8px 0;
}
.rich-renderer pre, .rich-renderer .ql-code-block, .rich-renderer .ql-code-block-container {
  background: #1e2430; color: #e9ecef; padding: 1rem 1.2rem; border-radius: 10px;
  overflow-x: auto; margin: 1rem 0; font-family: Consolas, Monaco, monospace;
}
.rich-renderer img { max-width: 100%; height: auto; border-radius: 10px; margin: .6rem 0; }
.rich-renderer hr { border: 0; border-top: 1px solid var(--border-color); margin: 1.6rem 0; }
.rich-renderer table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
.rich-renderer th, .rich-renderer td { border: 1px solid var(--border-color); padding: .6rem .8rem; }
.rich-renderer th { background: var(--bg-tertiary); font-weight: 600; }
.rich-renderer a { word-break: break-all; }
.rich-renderer .ql-align-center { text-align: center; }
.rich-renderer .ql-align-right { text-align: right; }
.rich-renderer .ql-align-justify { text-align: justify; }
.rich-renderer .ql-size-small { font-size: .85em; }
.rich-renderer .ql-size-large { font-size: 1.3em; }
.rich-renderer .ql-size-huge { font-size: 1.6em; }
.rich-renderer .ql-indent-1 { margin-left: 2em; }
.rich-renderer .ql-indent-2 { margin-left: 4em; }
.rich-renderer .ql-indent-3 { margin-left: 6em; }
.rich-renderer sup, .rich-renderer sub { line-height: 0; }
.download-section-box {
  background: var(--bg-primary); border-radius: var(--radius-xl); padding: 2rem;
  box-shadow: var(--shadow-md); border: 1px solid var(--border-color);
}

/* ---------------- 页脚 / 弹窗 / 其他 ---------------- */
.footer {
  background: linear-gradient(135deg, var(--primary-dark) 0%, #1a1a2e 100%);
  color: #fff; text-align: center; padding: 1.8rem; margin-top: auto;
  font-size: .95rem; box-shadow: 0 -4px 12px rgba(0,0,0,.1);
}
.footer p { opacity: .9; font-weight: 500; }
.footer a { color: #9ecbff; }
.footer .footer-links { margin-top: .6rem; opacity: .75; font-size: .85rem; }

.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.5); display: none;
  justify-content: center; align-items: center; z-index: 2000; backdrop-filter: blur(4px);
}
.modal-overlay.show { display: flex; }
.modal-content { background: #fff; border-radius: 12px; width: 90%; max-width: 420px; box-shadow: 0 10px 25px rgba(0,0,0,.2); overflow: hidden; animation: modal-pop .3s ease-out; }
@keyframes modal-pop { 0% { transform: scale(.9); opacity: 0; } 100% { transform: scale(1); opacity: 1; } }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 15px 20px; background: var(--bg-secondary); border-bottom: 1px solid var(--bg-tertiary); }
.modal-header h3 { margin: 0; font-size: 1.1rem; color: #2c3e50; }
.modal-close { background: none; font-size: 1.5rem; color: var(--secondary-color); }
.modal-close:hover { color: var(--danger-color); }
.modal-body { padding: 20px; color: #495057; }
.shortcut-list { list-style: none; margin: 0; padding: 0; }
.shortcut-list li { display: flex; align-items: center; margin-bottom: 10px; padding: 8px 12px; background: var(--bg-secondary); border-radius: 6px; font-size: .95rem; }
.shortcut-list li strong { width: 80px; color: #343a40; }
.shortcut-list li span:last-child { background: var(--bg-tertiary); padding: 2px 8px; border-radius: 4px; font-family: monospace; }
.modal-footer { padding: 15px 20px; border-top: 1px solid var(--bg-tertiary); display: flex; justify-content: flex-end; }
.modal-btn { padding: .5rem 1.2rem; border-radius: 6px; background: var(--primary-color); color: #fff; font-weight: 600; }
.modal-btn:hover { background: var(--primary-dark); }

.crumb { font-size: .85rem; color: var(--text-secondary); margin: 1rem 0 .5rem; }
.crumb a { color: var(--secondary-color); }
.notice-bar {
  max-width: 1200px; margin: 1rem auto 0; padding: .75rem 1.2rem;
  background: #fff8e1; border: 1px solid #ffe082; border-radius: var(--radius-md);
  color: #8a6d3b; font-size: .92rem;
}
.to-top {
  position: fixed; right: 1.5rem; bottom: 1.5rem; width: 44px; height: 44px; border-radius: 50%;
  background: var(--primary-color); color: #fff; font-size: 1.2rem; display: none;
  align-items: center; justify-content: center; box-shadow: var(--shadow-lg); z-index: 900;
}
.to-top.show { display: flex; }
.to-top:hover { background: var(--primary-dark); color: #fff; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 900px) {
  .nav-container { flex-direction: column; gap: .7rem; padding: .8rem 1rem; }
  .nav-left, .nav-right { width: 100%; justify-content: center; }
  .nav-center { order: -1; }
  .nav-logo h1 { font-size: 1.35rem; }
  .nav-links { gap: .3rem; }
  .nav-link { font-size: .85rem; padding: .35rem .6rem; }
  .section-container { margin: 1rem .8rem; padding: 1.5rem; }
  .section-header h2 { font-size: 1.6rem; }
  .os-section-container { margin: .8rem; }
  .category-sections { padding: 1rem; }
  .blog-container { padding: 1.2rem; }
  .article-grid { grid-template-columns: 1fr; }
  .software-header { flex-direction: column; text-align: center; padding: 1.8rem; }
  .software-info { padding: 0 1rem; }
}
@media (max-width: 600px) {
  html { font-size: 13px; }
  .search-section, .search-results-section { padding: 1rem .8rem; }
  .software-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .6rem; }
  .software-card { padding: .7rem; gap: .6rem; }
  .software-icon { width: 2.2rem; height: 2.2rem; font-size: 1.5rem; }
  .software-card h3 { font-size: .92rem; }
  .software-description { font-size: .76rem; }
  .resources-grid { grid-template-columns: 1fr; padding: 1rem; }
  .category-sections { padding: .7rem; }
  .category-header h3 { font-size: 1.05rem; }
  .os-section-header { padding: .8rem 1rem; }
  .os-icon { font-size: 1.6rem; }
  .os-section-header h2 { font-size: 1.15rem; }
  .search-results-grid { grid-template-columns: 1fr; }
  .fixed-nav { padding: .6rem .8rem; }
  .nav-btn { padding: .45rem .7rem; font-size: .85rem; }
  .btn-text { display: none; }
  .download-btn { min-width: 100%; padding: 1rem; }
  .download-row { flex-direction: column; }
  .versions-grid { grid-template-columns: 1fr; }
  .blog-header h1 { font-size: 1.6rem; }
  .blog-content, .download-section-box { padding: 1.2rem; }
}