/* ===========================================================
   iwan.vip 爱玩软件分享站 — 2026 主流设计系统
   风格：简约 · 大气 · 有格调
   =========================================================== */

/* ===========================================================
   1. 设计令牌（Design Tokens）
   =========================================================== */

:root {
    /* ---- 品牌主色系：靛蓝紫 ---- */
    --primary-50:  #eef2ff;
    --primary-100: #e0e7ff;
    --primary-200: #c7d2fe;
    --primary-300: #a5b4fc;
    --primary-400: #818cf8;
    --primary-500: #6366f1;   /* 主色 */
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --primary-800: #3730a3;
    --primary-900: #312e81;

    /* ---- 强调色：琥珀金 ---- */
    --accent-400: #fbbf24;
    --accent-500: #f59e0b;
    --accent-600: #d97706;

    /* ---- 语义色 ---- */
    --success:    #10b981;
    --warning:    #f59e0b;
    --danger:     #ef4444;
    --info:       #3b82f6;

    /* ---- 中性色系 ---- */
    --gray-50:  #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* ---- 语义映射（浅色主题）---- */
    --text-primary:   var(--gray-900);
    --text-secondary: var(--gray-500);
    --text-muted:     var(--gray-400);
    --bg-body:        #f5f7fb;
    --bg-card:        #ffffff;
    --bg-nav:         rgba(255,255,255,.82);
    --bg-glass:       rgba(255,255,255,.6);
    --border-color:    var(--gray-200);
    --border-light:    var(--gray-100);

    /* ---- 阴影系统（层次化）---- */
    --shadow-xs:  0 1px 2px rgba(0,0,0,.04);
    --shadow-sm:  0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --shadow-md:  0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -2px rgba(0,0,0,.05);
    --shadow-lg:  0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -4px rgba(0,0,0,.05);
    --shadow-xl:  0 20px 25px -5px rgba(0,0,0,.08), 0 8px 10px -6px rgba(0,0,0,.04);
    --shadow-glow: 0 0 20px rgba(99,102,241,.15);

    /* ---- 圆角系统 ---- */
    --radius-xs:  4px;
    --radius-sm:  8px;
    --radius-md:  12px;
    --radius-lg:  16px;
    --radius-xl:  20px;
    --radius-full: 9999px;

    /* ---- 间距系统（8px 基准）---- */
    --space-1: 0.25rem;   /* 4px  */
    --space-2: 0.5rem;    /* 8px  */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;       /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;      /* 48px */
    --space-16: 4rem;     /* 64px */

    /* ---- 字体系统 ---- */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
                  'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;

    /* ---- 过渡系统 ---- */
    --ease-out: cubic-bezier(.16,1,.3,1);
    --ease-spring: cubic-bezier(.34,1.56,.64,1);
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --duration-slow: 350ms;
}

/* ===========================================================
   暗黑主题 — 2026 精致暗色
   =========================================================== */
[data-theme="dark"] {
    --text-primary:   #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted:     #64748b;
    --bg-body:        #0b0f1a;
    --bg-card:        #131829;
    --bg-nav:         rgba(11,15,26,.85);
    --bg-glass:       rgba(19,24,41,.65);
    --border-color:    rgba(148,163,184,.12);
    --border-light:    rgba(148,163,184,.06);

    --shadow-xs:  0 1px 2px rgba(0,0,0,.2);
    --shadow-sm:  0 1px 3px rgba(0,0,0,.3), 0 1px 2px rgba(0,0,0,.2);
    --shadow-md:  0 4px 6px rgba(0,0,0,.35), 0 2px 4px rgba(0,0,0,.25);
    --shadow-lg:  0 10px 15px rgba(0,0,0,.4), 0 4px 6px rgba(0,0,0,.3);
    --shadow-xl:  0 20px 25px rgba(0,0,0,.45), 0 8px 10px rgba(0,0,0,.35);
    --shadow-glow: 0 0 30px rgba(99,102,241,.2);
}

/* ===========================================================
   2. 全局基础
   =========================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-body);
    transition: background var(--duration-slow), color var(--duration-slow);
    overflow-x: hidden;
}

a {
    color: var(--primary-500);
    text-decoration: none;
    transition: color var(--duration-fast);
}

a:hover { color: var(--primary-600); }

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

ul, ol { list-style: none; }

/* 自定义滚动条 */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover { background: var(--primary-400); }

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: rgba(148,163,184,.2);
}

/* ===========================================================
   3. 顶部导航 — 玻璃态
   =========================================================== */
.nav-top {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-nav);
    backdrop-filter: blur(20px) saturate(1.8);
    -webkit-backdrop-filter: blur(20px) saturate(1.8);
    border-bottom: 1px solid var(--border-color);
    transition: box-shadow var(--duration-normal), background var(--duration-slow);
}

.nav-top.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-inner {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    height: 64px;
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-600);
    text-decoration: none;
    flex-shrink: 0;
    letter-spacing: -0.02em;
    transition: opacity var(--duration-fast);
}

.nav-logo:hover { opacity: .8; color: var(--primary-600); }

.nav-logo .logo-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
    box-shadow: 0 2px 8px rgba(99,102,241,.3);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    flex: 1;
    overflow: hidden;
}

.nav-link {
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    transition: all var(--duration-fast) var(--ease-out);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-600);
    background: var(--primary-50);
}

[data-theme="dark"] .nav-link:hover {
    background: rgba(99,102,241,.1);
}

.nav-link.active {
    color: var(--primary-600);
    background: var(--primary-50);
    font-weight: 600;
}

[data-theme="dark"] .nav-link.active {
    background: rgba(99,102,241,.15);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

/* 导航搜索框 */
.search-box-nav {
    display: flex;
    align-items: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    padding: var(--space-2) var(--space-4);
    gap: var(--space-2);
    transition: all var(--duration-normal) var(--ease-out);
    min-width: 180px;
}

.search-box-nav:focus-within {
    border-color: var(--primary-400);
    box-shadow: 0 0 0 3px rgba(99,102,241,.12);
    background: var(--bg-card);
    min-width: 220px;
}

.search-box-nav .search-icon {
    color: var(--text-muted);
    font-size: 0.85rem;
    flex-shrink: 0;
}

.search-box-nav input {
    border: none;
    background: transparent;
    outline: none;
    color: var(--text-primary);
    font-size: 0.875rem;
    width: 100%;
    font-family: inherit;
}

.search-box-nav input::placeholder {
    color: var(--text-muted);
}

/* 主题切换按钮 */
.btn-theme {
    width: 38px;
    height: 38px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: var(--bg-card);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    transition: all var(--duration-fast) var(--ease-out);
    color: var(--text-secondary);
    flex-shrink: 0;
}

.btn-theme:hover {
    border-color: var(--primary-400);
    color: var(--primary-500);
    transform: rotate(15deg) scale(1.05);
    box-shadow: var(--shadow-xs);
}

/* 导航用户按钮 */
.nav-btn {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: 0.84rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--duration-fast) var(--ease-out);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
}

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

.nav-btn-outline:hover {
    color: var(--primary-600);
    border-color: var(--primary-400);
    background: var(--primary-50);
}

[data-theme="dark"] .nav-btn-outline:hover {
    background: rgba(99,102,241,.1);
}

.nav-btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border: none;
    box-shadow: 0 2px 8px rgba(99,102,241,.25);
}

.nav-btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    box-shadow: 0 4px 12px rgba(99,102,241,.35);
    transform: translateY(-1px);
    color: #fff;
}

/* ===========================================================
   4. Hero Banner — 2026 极简风格
   =========================================================== */
.hero-banner {
    position: relative;
    overflow: hidden;
    background: linear-gradient(160deg, #6366f1 0%, #7c3aed 35%, #9333ea 100%);
    padding: var(--space-16) var(--space-6);
    text-align: center;
}

/* 装饰性背景元素 */
.hero-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 70%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(255,255,255,.08) 0%, transparent 70%);
    pointer-events: none;
    animation: heroFloat 20s ease-in-out infinite;
}

.hero-banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -10%;
    width: 50%;
    height: 150%;
    background: radial-gradient(ellipse at center, rgba(251,191,36,.06) 0%, transparent 70%);
    pointer-events: none;
    animation: heroFloat 25s ease-in-out infinite reverse;
}

@keyframes heroFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33%      { transform: translate(2%, -2%) rotate(1deg); }
    66%      { transform: translate(-1%, 1%) rotate(-0.5deg); }
}

.hero-inner {
    position: relative;
    z-index: 1;
    max-width: 720px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: rgba(255,255,255,.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,.2);
    border-radius: var(--radius-full);
    padding: var(--space-2) var(--space-5);
    color: rgba(255,255,255,.95);
    font-size: 0.82rem;
    font-weight: 500;
    margin-bottom: var(--space-6);
    letter-spacing: 0.02em;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: #ffffff;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-4);
    text-shadow: 0 2px 20px rgba(0,0,0,.15);
}

.hero-subtitle {
    font-size: 1.05rem;
    color: rgba(255,255,255,.8);
    line-height: 1.7;
    max-width: 520px;
    margin: 0 auto var(--space-8);
    font-weight: 400;
}

.hero-search {
    max-width: 520px;
    margin: 0 auto;
    position: relative;
}

.hero-search-inner {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--space-2) var(--space-2) var(--space-2) var(--space-5);
    gap: var(--space-3);
    box-shadow: 0 8px 32px rgba(0,0,0,.18);
    transition: box-shadow var(--duration-normal);
}

.hero-search-inner:focus-within {
    box-shadow: 0 12px 40px rgba(0,0,0,.25);
}

.hero-search-inner .search-icon {
    color: var(--text-muted);
    font-size: 1rem;
    flex-shrink: 0;
}

.hero-search-inner input {
    flex: 1;
    border: none;
    background: transparent;
    outline: none;
    font-size: 0.95rem;
    color: var(--text-primary);
    font-family: inherit;
    padding: var(--space-3) 0;
}

.hero-search-inner input::placeholder {
    color: var(--text-muted);
}

.hero-search-btn {
    padding: var(--space-3) var(--space-6);
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(99,102,241,.3);
}

.hero-search-btn:hover {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    box-shadow: 0 4px 12px rgba(99,102,241,.4);
    transform: translateY(-1px);
}

/* ===========================================================
   5. Hero 内嵌公告条（融入 Banner 设计）
   =========================================================== */
.hero-notice {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 0.4rem 1rem;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 9999px;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.88);
    letter-spacing: 0.02em;
    animation: heroNoticeFadeIn 0.6s 0.4s both ease-out;
}

.hero-notice-icon {
    flex-shrink: 0;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.15));
}

@keyframes heroNoticeFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* 暗黑模式下公告微调 */
[data-theme="dark"] .hero-notice {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.12);
    color: rgba(255,255,255,0.75);
}

/* ===========================================================
   6. 布局容器
   =========================================================== */
.container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.page-wrap {
    padding: var(--space-8) 0 var(--space-16);
}

/* ===========================================================
   7. 板块标题 — 极简风格
   =========================================================== */
.section-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin: var(--space-10) 0 var(--space-6);
}

.section-header:first-child {
    margin-top: var(--space-8);
}

.section-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    white-space: nowrap;
}

.section-title .title-icon {
    font-size: 1.2rem;
}

/* 标题装饰线 */
.section-header::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border-color), transparent);
}

.section-more {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--duration-fast);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
}

.section-more:hover {
    color: var(--primary-500);
    gap: var(--space-2);
}

/* ===========================================================
   8. 分类卡片 — 渐变图标 + 微动效
   =========================================================== */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: var(--space-4);
}

.category-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-5) var(--space-3);
    text-align: center;
    transition: all var(--duration-normal) var(--ease-out);
    cursor: pointer;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-400), var(--primary-600));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration-normal) var(--ease-out);
}

.category-card:hover {
    border-color: var(--primary-200);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    color: var(--text-primary);
}

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

.category-card .cat-icon-wrap {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all var(--duration-normal) var(--ease-spring);
}

[data-theme="dark"] .category-card .cat-icon-wrap {
    background: linear-gradient(135deg, rgba(99,102,241,.15), rgba(99,102,241,.08));
}

.category-card:hover .cat-icon-wrap {
    transform: scale(1.08);
    box-shadow: var(--shadow-glow);
}

.category-card .cat-name {
    font-size: 0.84rem;
    font-weight: 600;
    line-height: 1.3;
}

/* ===========================================================
   9. 软件卡片 — 层次阴影 + 精致动效
   =========================================================== */
.soft-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-5);
}

.soft-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    transition: all var(--duration-normal) var(--ease-out);
    text-decoration: none;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-xs);
}

.soft-card:hover {
    border-color: var(--primary-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
    color: var(--text-primary);
}

/* 卡片顶部装饰渐变条 */
.soft-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-400), var(--primary-600), var(--accent-500));
    opacity: 0;
    transition: opacity var(--duration-normal);
}

.soft-card:hover::before {
    opacity: 1;
}

/* 置顶卡片特殊样式 */
.soft-card.is-top {
    border-color: rgba(99,102,241,.2);
    background: linear-gradient(180deg, rgba(99,102,241,.02) 0%, var(--bg-card) 100%);
}

.soft-card.is-top::before {
    opacity: 1;
}

.soft-card-head {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
}

.soft-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    overflow: hidden;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    box-shadow: var(--shadow-xs);
}

[data-theme="dark"] .soft-icon {
    background: linear-gradient(135deg, rgba(99,102,241,.15), rgba(99,102,241,.08));
}

.soft-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.soft-info {
    flex: 1;
    overflow: hidden;
    min-width: 0;
}

.soft-title {
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    color: var(--text-primary);
    margin: 0 0 var(--space-2);
}

.soft-meta {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.soft-tag {
    padding: 1px var(--space-3);
    background: var(--primary-50);
    color: var(--primary-600);
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

[data-theme="dark"] .soft-tag {
    background: rgba(99,102,241,.12);
    color: var(--primary-400);
}

.soft-intro {
    font-size: 0.84rem;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.soft-card-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-light);
    margin-top: auto;
}

.soft-system {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.soft-dl {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.badge-top {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    padding: 2px var(--space-3);
    background: linear-gradient(135deg, var(--accent-400), var(--accent-500));
    color: #fff;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    box-shadow: 0 2px 8px rgba(245,158,11,.3);
}

/* ===========================================================
   10. 热门排行榜 — 精致序号
   =========================================================== */
.rank-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.rank-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--border-light);
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--duration-fast) var(--ease-out);
    border-radius: var(--radius-sm);
}

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

.rank-item:hover {
    color: var(--primary-600);
    background: var(--primary-50);
    padding-left: var(--space-3);
}

[data-theme="dark"] .rank-item:hover {
    background: rgba(99,102,241,.06);
}

.rank-num {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.78rem;
    font-weight: 700;
    flex-shrink: 0;
    color: var(--text-muted);
    transition: all var(--duration-fast);
}

.rank-item:nth-child(1) .rank-num {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: #fff;
    box-shadow: 0 2px 8px rgba(239,68,68,.3);
}

.rank-item:nth-child(2) .rank-num {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
    box-shadow: 0 2px 8px rgba(245,158,11,.3);
}

.rank-item:nth-child(3) .rank-num {
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    color: #fff;
    box-shadow: 0 2px 8px rgba(99,102,241,.3);
}

.rank-name {
    font-size: 0.9rem;
    font-weight: 500;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.rank-dl {
    font-size: 0.8rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

/* ===========================================================
   11. 双栏布局
   =========================================================== */
.home-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--space-8);
    align-items: start;
}

@media (max-width: 1024px) {
    .home-layout {
        grid-template-columns: 1fr;
    }
}

/* 侧栏卡片 */
.sidebar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xs);
    overflow: hidden;
    position: sticky;
    top: 80px;
    transition: box-shadow var(--duration-normal);
}

.sidebar-card:hover {
    box-shadow: var(--shadow-sm);
}

.sidebar-card-header {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border-color);
    font-weight: 700;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-primary);
}

.sidebar-card-body {
    padding: var(--space-4) var(--space-5);
}

/* ===========================================================
   12. 按钮系统
   =========================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all var(--duration-fast) var(--ease-out);
    text-decoration: none;
    line-height: 1.4;
    font-family: inherit;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: #fff;
    box-shadow: 0 2px 8px rgba(99,102,241,.25);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    box-shadow: 0 4px 12px rgba(99,102,241,.35);
    transform: translateY(-1px);
    color: #fff;
}

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

.btn-outline:hover {
    border-color: var(--primary-400);
    color: var(--primary-600);
    background: var(--primary-50);
}

[data-theme="dark"] .btn-outline:hover {
    background: rgba(99,102,241,.1);
}

.btn-danger { background: var(--danger); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: 1rem; border-radius: var(--radius-md); }
.btn-sm { padding: var(--space-2) var(--space-4); font-size: 0.82rem; }
.btn-block { width: 100%; }

/* ===========================================================
   13. 表单系统
   =========================================================== */
.form-group { margin-bottom: var(--space-5); }

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all var(--duration-fast) var(--ease-out);
    outline: none;
    font-family: inherit;
    line-height: 1.5;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--primary-400);
    box-shadow: 0 0 0 3px rgba(99,102,241,.1);
}

.form-textarea { resize: vertical; min-height: 100px; }

.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: var(--space-2);
}

.form-error {
    font-size: 0.8rem;
    color: var(--danger);
    margin-top: var(--space-2);
}

/* ===========================================================
   14. 分页
   =========================================================== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    margin: var(--space-10) 0;
    flex-wrap: wrap;
}

.page-btn {
    padding: var(--space-2) var(--space-4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--duration-fast) var(--ease-out);
    min-width: 38px;
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: inherit;
}

.page-btn:hover,
.page-btn.active {
    background: var(--primary-500);
    border-color: var(--primary-500);
    color: #fff;
    box-shadow: 0 2px 8px rgba(99,102,241,.25);
}

.page-btn.disabled {
    opacity: .4;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===========================================================
   15. 卡片（通用）
   =========================================================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xs);
    overflow: hidden;
    transition: box-shadow var(--duration-normal);
}

.card-header {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-primary);
}

.card-body { padding: var(--space-5); }

/* ===========================================================
   16. 下载区域
   =========================================================== */
.dl-zone {
    background: linear-gradient(135deg, rgba(99,102,241,.04), rgba(124,58,237,.04));
    border: 1px solid rgba(99,102,241,.12);
    border-radius: var(--radius-md);
    padding: var(--space-6);
}

[data-theme="dark"] .dl-zone {
    background: linear-gradient(135deg, rgba(99,102,241,.06), rgba(124,58,237,.04));
}

.dl-zone-title {
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: var(--space-5);
    color: var(--primary-600);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.dl-btns {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

.dl-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--duration-fast) var(--ease-out);
    border: 1.5px solid transparent;
    font-family: inherit;
}

.dl-btn-lanzou {
    background: var(--primary-500);
    color: #fff;
    box-shadow: 0 2px 8px rgba(99,102,241,.25);
}
.dl-btn-lanzou:hover {
    background: var(--primary-600);
    box-shadow: 0 4px 12px rgba(99,102,241,.35);
    transform: translateY(-1px);
    color: #fff;
}

.dl-btn-baidu {
    background: rgba(37,99,235,.08);
    border-color: rgba(37,99,235,.3);
    color: #2563eb;
}
.dl-btn-baidu:hover {
    background: #2563eb;
    color: #fff;
}

.dl-btn-direct {
    background: var(--success);
    color: #fff;
    box-shadow: 0 2px 8px rgba(16,185,129,.25);
}
.dl-btn-direct:hover {
    opacity: .9;
    transform: translateY(-1px);
    color: #fff;
}

.dl-info {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-5);
    font-size: 0.82rem;
    color: var(--text-muted);
}

.dl-info-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.dl-info-val {
    font-weight: 600;
    color: var(--text-primary);
}

/* ===========================================================
   17. 截图预览
   =========================================================== */
.screenshots {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-4);
}

.screenshot-item {
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: zoom-in;
    aspect-ratio: 16/10;
    border: 1px solid var(--border-color);
    transition: all var(--duration-normal) var(--ease-out);
}

.screenshot-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.screenshot-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-out);
}

.screenshot-item:hover img {
    transform: scale(1.05);
}

/* ===========================================================
   18. 评论区
   =========================================================== */
.comment-item {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-5) 0;
    border-bottom: 1px solid var(--border-light);
}

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

.comment-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-100), var(--primary-200));
    color: var(--primary-600);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    flex-shrink: 0;
    overflow: hidden;
    box-shadow: var(--shadow-xs);
}

[data-theme="dark"] .comment-avatar {
    background: linear-gradient(135deg, rgba(99,102,241,.2), rgba(99,102,241,.1));
}

.comment-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.comment-body { flex: 1; min-width: 0; }

.comment-meta {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-2);
}

.comment-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.comment-time {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.comment-text {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

/* ===========================================================
   19. 底部 — 现代简约
   =========================================================== */
.site-footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: var(--space-16) var(--space-6) var(--space-8);
    margin-top: var(--space-16);
}

.footer-inner {
    max-width: 1320px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-10);
    margin-bottom: var(--space-10);
}

.footer-brand-logo {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary-600);
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.footer-brand-logo .logo-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1rem;
}

.footer-brand-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 320px;
}

.footer-col-title {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: var(--space-5);
    color: var(--text-primary);
    letter-spacing: 0.01em;
}

.footer-links { margin: 0; padding: 0; }
.footer-links li { margin-bottom: var(--space-3); }
.footer-links a {
    font-size: 0.88rem;
    color: var(--text-secondary);
    transition: all var(--duration-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}
.footer-links a:hover {
    color: var(--primary-500);
    transform: translateX(3px);
}

.footer-bottom {
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
    font-size: 0.84rem;
    color: var(--text-muted);
}

/* ===========================================================
   20. 灯箱
   =========================================================== */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.9);
    backdrop-filter: blur(10px);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    cursor: zoom-out;
}

.lightbox.active { display: flex; }

.lightbox img {
    max-width: 90vw;
    max-height: 90vh;
    border-radius: var(--radius-md);
    box-shadow: 0 20px 60px rgba(0,0,0,.5);
}

.lightbox-close {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    background: rgba(255,255,255,.1);
    border: none;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--duration-fast);
    line-height: 1;
}
.lightbox-close:hover { background: rgba(255,255,255,.2); }

/* ===========================================================
   21. Toast 提示
   =========================================================== */
.toast-wrap {
    position: fixed;
    top: 80px;
    right: var(--space-6);
    z-index: 9998;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    pointer-events: none;
}

.toast {
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: #fff;
    box-shadow: var(--shadow-lg);
    transform: translateX(120%);
    transition: transform var(--duration-normal) var(--ease-out);
    pointer-events: auto;
    font-weight: 500;
}

.toast.show { transform: translateX(0); }
.toast-success { background: var(--success); }
.toast-error   { background: var(--danger); }
.toast-info    { background: var(--primary-500); }

/* ===========================================================
   22. 骨架屏加载
   =========================================================== */
.skeleton {
    background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-sm);
}

[data-theme="dark"] .skeleton {
    background: linear-gradient(90deg, var(--gray-800) 25%, var(--gray-700) 50%, var(--gray-800) 75%);
    background-size: 200% 100%;
}

@keyframes skeleton-loading {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ===========================================================
   23. 标签
   =========================================================== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 2px var(--space-3);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.01em;
}

.tag-green  { background: rgba(16,185,129,.1); color: var(--success); }
.tag-blue   { background: rgba(59,130,246,.1); color: var(--info); }
.tag-orange { background: rgba(245,158,11,.1); color: var(--warning); }
.tag-red    { background: rgba(239,68,68,.1); color: var(--danger); }
.tag-purple { background: rgba(99,102,241,.1); color: var(--primary-500); }

/* ===========================================================
   24. 响应式
   =========================================================== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-8);
    }
    .hero-title { font-size: 2rem; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .search-box-nav { min-width: auto; }
    .hero-banner { padding: var(--space-10) var(--space-4); }
    .hero-title { font-size: 1.65rem; }
    .hero-subtitle { font-size: 0.95rem; }
    .soft-grid { grid-template-columns: 1fr; }
    .category-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    .dl-btns { flex-direction: column; }
    .nav-inner { padding: 0 var(--space-4); }
    .container { padding: 0 var(--space-4); }
}

@media (max-width: 480px) {
    .soft-grid { grid-template-columns: 1fr; }
    .hero-search-inner { flex-wrap: wrap; }
    .hero-search-btn { width: 100%; justify-content: center; }
}

/* ===========================================================
   25. 页面入场动画
   =========================================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp var(--duration-slow) var(--ease-out) both;
}

.fade-in-up:nth-child(1) { animation-delay: 0ms; }
.fade-in-up:nth-child(2) { animation-delay: 60ms; }
.fade-in-up:nth-child(3) { animation-delay: 120ms; }
.fade-in-up:nth-child(4) { animation-delay: 180ms; }
.fade-in-up:nth-child(5) { animation-delay: 240ms; }
.fade-in-up:nth-child(6) { animation-delay: 300ms; }