/* =========================================================
   Fireki · 站点样式 v2
   青蓝主题 + 现代化视觉 + 深色模式
   ========================================================= */

/* ===================== 变量 ===================== */
/* =========================================================
   变量（默认深色）
   ========================================================= */
:root {
    /* ---- 主题色 ---- */
    --primary:        #4f6df5;
    --primary-dark:   #3d58e0;
    --primary-light:  #1c2440;
    --primary-glow:   rgba(79, 109, 245, .35);

    /* ---- 文字 ---- */
    --text:           #f0f0f5;
    --text-sub:       #a8adbd;
    --text-muted:     #6e7383;

    /* ---- 边框 ---- */
    --border:         #2a2d3a;
    --border-light:   #1f2230;

    /* ---- 背景 ---- */
    --bg:             #0e1017;
    --bg-card:        #161923;
    --bg-hover:       #1c2030;

    /* ---- 语义色 ---- */
    --success:        #10b981;
    --success-bg:     #0f2a22;
    --danger:         #ef4444;
    --danger-bg:      #2a1515;
    --warning:        #f59e0b;
    --warning-bg:     #2a2010;

    /* ---- 圆角 ---- */
    --radius:         14px;
    --radius-sm:      10px;
    --radius-lg:      20px;

    /* ---- 阴影 ---- */
    --shadow-sm:      0 1px 3px rgba(0,0,0,.4);
    --shadow:         0 4px 16px rgba(0,0,0,.5);
    --shadow-md:      0 8px 24px rgba(0,0,0,.6);
    --shadow-lg:      0 12px 40px rgba(79,109,245,.3);
    --shadow-primary: 0 8px 24px var(--primary-glow);

    /* ---- 动效 ---- */
    --transition:     .2s cubic-bezier(.4,0,.2,1);
    --transition-slow:.35s cubic-bezier(.4,0,.2,1);
}

/* ---- 浅色模式 ---- */
[data-theme="light"] {
    --text:           #1f2233;
    --text-sub:       #6b7280;
    --text-muted:     #9ca3af;

    --border:         #e5e7eb;
    --border-light:   #f3f4f6;

    --bg:             #f5f6fa;
    --bg-card:        #ffffff;
    --bg-hover:       #f8f9fc;

    --primary-light:  #eef2ff;
    --primary-glow:   rgba(79, 109, 245, .18);

    --success-bg:     #ecfdf5;
    --danger-bg:      #fef2f2;
    --warning-bg:     #fffbeb;

    --shadow-sm:      0 1px 3px rgba(0,0,0,.04);
    --shadow:         0 4px 16px rgba(31,34,51,.06);
    --shadow-md:      0 8px 24px rgba(31,34,51,.08);
    --shadow-lg:      0 12px 40px var(--primary-glow);
}

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

html {
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
                 "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
                 sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background var(--transition), color var(--transition);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover { color: var(--primary-dark); }

button { font-family: inherit; cursor: pointer; border: none; outline: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* 滚动条美化 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 5px;
    border: 2px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

::selection { background: var(--primary); color: #fff; }

/* ===================== 布局 ===================== */
.container {
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

.page-center {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

/* ===================== 顶栏 ===================== */
.site-header {
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    background: rgba(255,255,255,.85);
}
[data-theme="dark"] .site-header {
    background: rgba(22,25,35,.85);
}

.site-header .inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 62px;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--text);
    font-size: 16px;
    letter-spacing: -.2px;
    transition: transform var(--transition);
}
.brand:hover { transform: translateY(-1px); color: var(--text); }

.brand-dot {
    width: 30px;
    height: 30px;
    border-radius: 9px;
    object-fit: cover;
    display: block;
    flex-shrink: 0;
    box-shadow: 0 4px 12px var(--primary-glow);
    transition: transform var(--transition), box-shadow var(--transition);
}
.brand:hover .brand-dot {
    transform: rotate(-8deg) scale(1.05);
    box-shadow: 0 6px 16px var(--primary-glow);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 主题切换按钮 */
.theme-toggle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-sub);
    transition: all var(--transition);
    flex-shrink: 0;
}
.theme-toggle:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: rotate(20deg);
}
.theme-toggle svg { width: 16px; height: 16px; }
[data-theme="light"] .icon-moon,
[data-theme="dark"]  .icon-sun { display: none; }

/* 用户标签 */
.user-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 10px 4px 4px;
    background: var(--bg);
    border: 1px solid var(--border-light);
    border-radius: 999px;
    font-size: 13px;
    color: var(--text);
    transition: all var(--transition);
}
.user-chip:hover {
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
}

.user-chip img,
.user-chip .avatar-fallback {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 12px;
    flex-shrink: 0;
}

.user-chip .logout {
    color: var(--text-muted);
    font-size: 12px;
    margin-left: 4px;
    padding-left: 8px;
    border-left: 1px solid var(--border);
    transition: color var(--transition);
}
.user-chip .logout:hover { color: var(--danger); }

/* ===================== 卡片 ===================== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    overflow: hidden;
    transition: box-shadow var(--transition), transform var(--transition);
}
.card-body { padding: 36px; }

.auth-card {
    max-width: 440px;
    box-shadow: var(--shadow-lg);
    animation: cardIn .4s cubic-bezier(.4,0,.2,1);
}

@keyframes cardIn {
    from { opacity: 0; transform: translateY(12px) scale(.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.auth-card .brand-logo {
    width: 60px;
    height: 60px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 22px;
    overflow: hidden;
    box-shadow: 0 8px 24px var(--primary-glow);
    transition: transform var(--transition);
}
.auth-card:hover .brand-logo { transform: scale(1.05) rotate(-3deg); }
.auth-card .brand-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 18px;
}

.auth-card h1 {
    font-size: 22px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 6px;
    letter-spacing: -.3px;
    color: var(--text);
}

.auth-card .subtitle {
    text-align: center;
    color: var(--text-sub);
    font-size: 14px;
    margin-bottom: 28px;
}

/* ===================== 表单 ===================== */
.form-group { margin-bottom: 16px; }

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-sub);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    background: var(--bg-card);
    color: var(--text);
    transition: all var(--transition);
}
.form-input:hover { border-color: #d1d5db; }
.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
    outline: none;
}
.form-input::placeholder { color: var(--text-muted); }

/* ===================== 按钮 ===================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
    text-decoration: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    user-select: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    width: 100%;
    box-shadow: 0 4px 12px var(--primary-glow);
}
.btn-primary:hover {
    background: var(--primary-dark);
    color: #fff;
    box-shadow: 0 6px 20px var(--primary-glow);
    transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(1px) scale(.99); }
.btn-primary:disabled {
    background: #c7c9d4;
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
    opacity: .7;
}

/* 波纹效果容器 */
.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--x, 50%) var(--y, 50%),
                rgba(255,255,255,.4) 0%, transparent 60%);
    opacity: 0;
    transition: opacity .4s;
    pointer-events: none;
}
.btn:active::before { opacity: 1; transition: none; }

/* ===================== 提示 ===================== */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    line-height: 1.6;
    margin-bottom: 18px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    animation: slideDown .3s ease;
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}
.alert-error {
    background: var(--danger-bg);
    color: #b91c1c;
    border-left: 3px solid var(--danger);
}
[data-theme="dark"] .alert-error { color: #fca5a5; }
.alert-success {
    background: var(--success-bg);
    color: #047857;
    border-left: 3px solid var(--success);
}
[data-theme="dark"] .alert-success { color: #6ee7b7; }

/* ===================== 帮助面板 ===================== */
.help-panel {
    margin-top: 22px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color var(--transition);
}
.help-panel:hover { border-color: var(--border); }

.help-panel summary {
    cursor: pointer;
    padding: 12px 16px;
    font-size: 13px;
    color: var(--text-sub);
    background: #fafbfc;
    user-select: none;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background var(--transition), color var(--transition);
}
[data-theme="dark"] .help-panel summary { background: var(--bg-hover); }
.help-panel summary::-webkit-details-marker { display: none; }
.help-panel summary:hover {
    background: var(--primary-light);
    color: var(--primary);
}
.help-panel summary::after {
    content: '▾';
    font-size: 12px;
    color: var(--text-muted);
    transition: transform var(--transition);
}
.help-panel[open] summary::after { transform: rotate(180deg); }
.help-panel .help-body {
    padding: 14px 16px;
    font-size: 13px;
    color: var(--text-sub);
    line-height: 1.8;
    border-top: 1px solid var(--border-light);
    background: var(--bg-card);
    animation: expandIn .25s ease;
}
@keyframes expandIn {
    from { opacity: 0; max-height: 0; }
    to   { opacity: 1; max-height: 500px; }
}
.help-panel ol { padding-left: 20px; margin-bottom: 8px; }
.help-panel li { margin-bottom: 4px; }
.help-panel .link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 8px;
    font-weight: 500;
}

/* ===================== 等级横幅 ===================== */
.level-banner {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 22px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    border: 1px solid var(--border-light);
    background: var(--bg-card);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
}
.level-banner:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.level-banner::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 4px;
}
.level-banner.level-none::before    { background: #cbd5e1; }
.level-banner.level-silver::before  { background: linear-gradient(180deg,#cbd5e1,#94a3b8); }
.level-banner.level-gold::before    { background: linear-gradient(180deg,#fbbf24,#d97706); }
.level-banner.level-diamond::before { background: linear-gradient(180deg,#60a5fa,#a78bfa); }

.level-banner::after {
    content: '';
    position: absolute;
    right: -50px;
    top: -50px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    opacity: .5;
    pointer-events: none;
}

.level-banner .level-icon {
    font-size: 34px;
    line-height: 1;
    flex-shrink: 0;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,.1));
    transition: transform var(--transition);
}
.level-banner:hover .level-icon { transform: scale(1.1) rotate(-5deg); }

.level-banner .level-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 2px;
}
.level-banner .level-sub { font-size: 13px; color: var(--text-sub); }

/* ===================== 等级图例 ===================== */
.level-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    padding: 12px 16px;
    background: #fafbfc;
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
    font-size: 12px;
    color: var(--text-sub);
    border: 1px solid var(--border-light);
}
[data-theme="dark"] .level-legend { background: var(--bg-hover); }

.legend-item {
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    font-weight: 500;
    transition: all var(--transition);
    cursor: default;
}
.legend-item:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}
.legend-silver  { color: #64748b; border-color: #cbd5e1; }
.legend-gold    { color: #b45309; border-color: #fcd34d; }
.legend-diamond { color: #6d28d9; border-color: #c4b5fd; }
.legend-hint { margin-left: auto; color: var(--text-muted); }

/* ===================== 文件列表 ===================== */
.files-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}
.files-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    display: flex;
    align-items: baseline;
}
.files-header .count {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 400;
    margin-left: 6px;
}

.search-box { position: relative; flex: 1; max-width: 280px; }
.search-box input {
    width: 100%;
    padding: 10px 14px 10px 38px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--bg-card);
    color: var(--text);
    transition: all var(--transition);
}
.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
    outline: none;
}
.search-box::before {
    content: '🔍';
    position: absolute;
    left: 13px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 13px;
    opacity: .5;
    pointer-events: none;
    transition: transform var(--transition);
}
.search-box:focus-within::before {
    transform: translateY(-50%) scale(1.15);
    opacity: .8;
}

.file-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    animation: fadeSlideIn .3s ease backwards;
}
.file-item:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 16px var(--primary-glow);
    transform: translateY(-2px);
}
@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.file-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
    background: var(--primary-light);
    color: var(--primary);
    transition: transform var(--transition), box-shadow var(--transition);
}
.file-item:hover .file-icon {
    transform: scale(1.08) rotate(-4deg);
    box-shadow: 0 4px 12px rgba(0,0,0,.1);
}

.file-icon[data-ext="pdf"]  { background: #fee2e2; color: #dc2626; }
.file-icon[data-ext="zip"],
.file-icon[data-ext="rar"],
.file-icon[data-ext="7z"]   { background: #fef3c7; color: #d97706; }
.file-icon[data-ext="jpg"],
.file-icon[data-ext="jpeg"],
.file-icon[data-ext="png"],
.file-icon[data-ext="gif"],
.file-icon[data-ext="webp"] { background: #dbeafe; color: #2563eb; }
.file-icon[data-ext="mp4"],
.file-icon[data-ext="mkv"],
.file-icon[data-ext="avi"]  { background: #f3e8ff; color: #9333ea; }
.file-icon[data-ext="mp3"],
.file-icon[data-ext="wav"],
.file-icon[data-ext="flac"] { background: #fce7f3; color: #db2777; }
.file-icon[data-ext="doc"],
.file-icon[data-ext="docx"] { background: #dbeafe; color: #1d4ed8; }
.file-icon[data-ext="xls"],
.file-icon[data-ext="xlsx"] { background: #dcfce7; color: #16a34a; }

.file-info { flex: 1; min-width: 0; }
.file-name {
    font-weight: 500;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 14px;
}
.file-meta {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 3px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px 8px;
}
.file-meta span + span::before {
    content: '·';
    margin-right: 8px;
    color: var(--border);
}

/* 等级标签 */
.tag {
    display: inline-block;
    padding: 1px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 500;
}
.tag-silver  { background: #f1f5f9; color: #475569; }
.tag-gold    { background: #fef3c7; color: #92400e; }
.tag-diamond { background: #ede9fe; color: #6d28d9; }
[data-theme="dark"] .tag-silver  { background: #1e293b; color: #cbd5e1; }
[data-theme="dark"] .tag-gold    { background: #422006; color: #fcd34d; }
[data-theme="dark"] .tag-diamond { background: #2e1065; color: #c4b5fd; }

.btn-download {
    padding: 8px 18px;
    font-size: 13px;
    font-weight: 500;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: all var(--transition);
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}
.btn-download::before {
    content: '↓';
    display: inline-block;
    transition: transform var(--transition);
}
.btn-download:hover {
    background: var(--primary-dark);
    color: #fff;
    box-shadow: 0 6px 20px var(--primary-glow);
    transform: translateY(-2px);
}
.btn-download:hover::before { transform: translateY(2px); }
.btn-download:active { transform: translateY(0) scale(.98); }

/* ===================== 空状态 ===================== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
    animation: fadeSlideIn .4s ease;
}
.empty-state .icon {
    font-size: 56px;
    margin-bottom: 16px;
    opacity: .35;
    animation: float 3s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-8px); }
}
.empty-state p { font-size: 14px; }

/* ===================== 页脚 ===================== */
.site-footer {
    text-align: center;
    padding: 24px 20px;
    color: var(--text-muted);
    font-size: 12px;
    margin-top: auto;
    border-top: 1px solid var(--border-light);
}
.site-footer a {
    color: var(--text-muted);
    text-decoration: underline;
    text-underline-offset: 3px;
}
.site-footer a:hover { color: var(--primary); }

/* ===================== 加载动画 ===================== */
.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .6s linear infinite;
    display: inline-block;
    vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===================== 页面进度条 ===================== */
.page-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    width: 0;
    z-index: 9999;
    transition: width .3s ease;
    pointer-events: none;
    box-shadow: 0 0 8px var(--primary);
}
.page-progress.done {
    width: 100%;
    opacity: 0;
    transition: width .2s ease, opacity .4s ease .2s;
}

/* ===================== 返回顶部 ===================== */
.back-to-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px) scale(.8);
    transition: all var(--transition);
    z-index: 100;
    box-shadow: 0 8px 24px var(--primary-glow);
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}
.back-to-top:hover {
    transform: translateY(-4px) scale(1.05);
    background: var(--primary-dark);
    box-shadow: 0 12px 32px var(--primary-glow);
}
.back-to-top svg { width: 20px; height: 20px; }

/* ===================== Toast 提示 ===================== */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}
.toast {
    padding: 12px 18px;
    background: var(--bg-card);
    color: var(--text);
    border-radius: var(--radius-sm);
    font-size: 13px;
    box-shadow: var(--shadow-md);
    border-left: 3px solid var(--primary);
    max-width: 340px;
    pointer-events: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: toastIn .3s cubic-bezier(.4,0,.2,1);
}
.toast.toast-success { border-left-color: var(--success); }
.toast.toast-error   { border-left-color: var(--danger); }
.toast::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
}
.toast.toast-success::before { background: var(--success); }
.toast.toast-error::before   { background: var(--danger); }
.toast.toast-exit {
    animation: toastOut .25s ease forwards;
}
@keyframes toastIn {
    from { opacity: 0; transform: translateX(40px); }
    to   { opacity: 1; transform: translateX(0); }
}
@keyframes toastOut {
    to { opacity: 0; transform: translateX(40px); }
}

/* ===================== 移动端 ===================== */
@media (max-width: 640px) {
    .card-body { padding: 24px; }
    .auth-card h1 { font-size: 20px; }
    .files-header { flex-direction: column; align-items: stretch; }
    .search-box { max-width: 100%; }
    .file-item { padding: 12px 14px; gap: 10px; }
    .file-icon { width: 38px; height: 38px; font-size: 16px; }
    .btn-download { padding: 7px 14px; font-size: 12px; }
    .site-header .inner { padding: 0 16px; height: 58px; }
    .legend-hint { margin-left: 0; flex-basis: 100%; }
    .level-banner { padding: 14px 16px; gap: 12px; }
    .level-banner .level-icon { font-size: 28px; }
    .user-chip span:not(.avatar-fallback):not(.logout) { display: none; }
    .toast-container { left: 12px; right: 12px; top: 72px; }
    .toast { max-width: none; }
    .back-to-top { right: 16px; bottom: 16px; width: 40px; height: 40px; }
    .back-to-top svg { width: 18px; height: 18px; }
}

.file-item.is-hidden { display: none; }

/* ===================== 减少动画 ===================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ===================== 弹窗基础 ===================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 18, 30, .6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
    animation: modalFade .2s ease;
}
.modal-overlay[hidden] { display: none; }
@keyframes modalFade {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.modal {
    background: var(--bg-card);
    border-radius: var(--radius);
    width: 100%;
    max-width: 460px;
    box-shadow: var(--shadow-lg);
    animation: modalPop .25s cubic-bezier(.2,.8,.2,1);
    overflow: hidden;
    border: 1px solid var(--border-light);
}
@keyframes modalPop {
    from { transform: translateY(16px) scale(.97); opacity: 0; }
    to   { transform: translateY(0) scale(1); opacity: 1; }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    border-bottom: 1px solid var(--border-light);
}
.modal-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -.2px;
}
.modal-close {
    background: none;
    border: none;
    font-size: 18px;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: all var(--transition);
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}
.modal-close:hover {
    background: var(--bg);
    color: var(--danger);
    transform: rotate(90deg);
}
.modal-body { padding: 22px; }
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 22px;
    border-top: 1px solid var(--border-light);
    background: var(--bg);
}
[data-theme="dark"] .modal-footer { background: var(--bg-hover); }
[data-theme="dark"] .modal-close:hover { background: var(--bg-hover); }

/* ===================== 下载弹窗特有 ===================== */
.download-modal .modal-header h3::before {
    content: '';
    display: inline-block;
    width: 3px;
    height: 16px;
    background: var(--primary);
    border-radius: 2px;
    margin-right: 10px;
    transform: translateY(2px);
}

.download-file-info {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px;
    background: var(--bg);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
}
[data-theme="dark"] .download-file-info { background: var(--bg-hover); }

.download-file-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
    box-shadow: 0 4px 12px var(--primary-glow);
}

.download-file-detail { flex: 1; min-width: 0; }
.download-file-name {
    font-size: 14.5px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    word-break: break-all;
}
.download-file-meta {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    flex-wrap: wrap;
    gap: 4px 12px;
}
.download-file-meta span + span::before {
    content: '·';
    margin-right: 12px;
    color: var(--border);
}

/* 下载进度条 */
.download-progress {
    margin-top: 8px;
}
.download-progress[hidden] { display: none; }

.download-progress-bar {
    height: 6px;
    background: var(--border-light);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 8px;
}
.download-progress-fill {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    border-radius: 999px;
    transition: width .25s ease;
    box-shadow: 0 0 12px var(--primary-glow);
}
.download-progress-text {
    font-size: 12px;
    color: var(--text-sub);
    text-align: center;
    font-variant-numeric: tabular-nums;
}

/* 按钮 spinner */
.btn .spinner {
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255,255,255,.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .6s linear infinite;
    display: inline-block;
    vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 小屏幕 */
@media (max-width: 640px) {
    .modal { max-width: 100%; }
    .download-file-icon { width: 44px; height: 44px; font-size: 20px; }
    .download-file-name { font-size: 14px; }
}

/* ===================== 等级分组区块 ===================== */
.files-summary {
    margin-bottom: 22px;
}
.files-summary h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    display: flex;
    align-items: baseline;
}
.files-summary .count {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 400;
    margin-left: 8px;
}

.level-section {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    padding: 22px 24px;
    margin-bottom: 22px;
    position: relative;
    overflow: hidden;
    animation: fadeSlideIn .35s ease backwards;
}

/* 顶部彩色条 */
.level-section::before {
    content: '';
    position: absolute;
    left: 0; right: 0; top: 0;
    height: 3px;
    background: var(--border);
}
.level-section-silver::before  { background: linear-gradient(90deg, #cbd5e1, #94a3b8); }
.level-section-gold::before    { background: linear-gradient(90deg, #fbbf24, #d97706); }
.level-section-diamond::before { background: linear-gradient(90deg, #60a5fa, #a78bfa); }

/* 头部 */
.level-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 18px;
    padding-bottom: 14px;
    border-bottom: 1px dashed var(--border-light);
}

.level-section-title {
    display: flex;
    align-items: baseline;
    gap: 10px;
    flex-wrap: wrap;
}
.level-section-emoji {
    font-size: 22px;
    line-height: 1;
}
.level-section-title h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -.2px;
    margin: 0;
}
.level-section-count {
    font-size: 12px;
    color: var(--text-muted);
    padding: 2px 10px;
    border-radius: 999px;
    background: var(--bg);
    border: 1px solid var(--border-light);
}
[data-theme="dark"] .level-section-count { background: var(--bg-hover); }

.level-section-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.level-section-hint {
    font-size: 12px;
    color: var(--text-muted);
}

/* 该等级专属搜索框 */
.level-section .search-box {
    position: relative;
    max-width: 220px;
    flex: none;
    min-width: 180px;
}
.level-section .search-box input {
    width: 100%;
    padding: 8px 12px 8px 32px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    background: var(--bg);
    color: var(--text);
    transition: all var(--transition);
}
[data-theme="dark"] .level-section .search-box input { background: var(--bg-hover); }
.level-section .search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
    outline: none;
}
.level-section .search-box::before {
    content: '🔍';
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 12px;
    opacity: .5;
    pointer-events: none;
}

/* 空区块 */
.level-section-empty {
    padding: 26px 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    border: 1px dashed var(--border);
}
[data-theme="dark"] .level-section-empty { background: var(--bg-hover); }

/* 搜索无结果提示 */
.level-section-noresult {
    padding: 22px 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    border: 1px dashed var(--border);
    margin-top: 8px;
}
.level-section-noresult[hidden] { display: none; }
[data-theme="dark"] .level-section-noresult { background: var(--bg-hover); }

/* 等级区块内文件图标主题色 */
.level-section-silver  .file-icon:not([data-ext]) { background: #f1f5f9; color: #475569; }
.level-section-gold    .file-icon:not([data-ext]) { background: #fef3c7; color: #92400e; }
.level-section-diamond .file-icon:not([data-ext]) { background: #ede9fe; color: #6d28d9; }

/* 移动端 */
@media (max-width: 640px) {
    .level-section { padding: 18px 16px; }
    .level-section-header { flex-direction: column; align-items: stretch; }
    .level-section .search-box { max-width: 100%; min-width: 0; }
}

/* =========================================================
   顶部菜单栏（跟随站点主题）
   ========================================================= */

/* ---- 变量：为菜单栏单独定义一组，浅色/深色自动切换 ---- */
:root {
    --header-text:            var(--text);
    --header-text-sub:        var(--text-sub);
    --header-text-hover-bg:   rgba(127, 127, 127, .08);
    --header-nav-active:      var(--primary);

    /* 透明模式下的文字颜色（叠在深色 Hero 上） */
    --header-onimage-text:    rgba(255, 255, 255, .92);
    --header-onimage-text-sub: rgba(255, 255, 255, .72);
    --header-onimage-hover-bg: rgba(255, 255, 255, .10);
    --header-onimage-border:   rgba(255, 255, 255, .25);
    --header-onimage-active:   #ffffff;

    /* 实色/毛玻璃背景 */
    --header-bg:              var(--bg);
    --header-bg-blur:         color-mix(in srgb, var(--bg) 88%, transparent);
    --header-border:          var(--border-light);
    --header-shadow:          0 4px 20px rgba(0, 0, 0, .06);
}

[data-theme="dark"] {
    --header-bg:              #0e1017;
    --header-bg-blur:         rgba(14, 16, 23, .88);
    --header-border:          #1f2230;
    --header-shadow:          0 4px 20px rgba(0, 0, 0, .45);
    --header-text-hover-bg:   rgba(255, 255, 255, .06);
}

/* ---- 基础布局 ---- */
.site-header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--header-bg);
    border-bottom: 1px solid transparent;
    transition: background .3s ease,
                border-color .3s ease,
                backdrop-filter .3s ease,
                box-shadow .3s ease;
}

.site-header-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 20px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 28px;
    height: 72px;
    position: relative;
}

/* ---- 首页顶部：透明叠在 Hero 上 ---- */
.site-header.site-header-transparent {
    position: fixed;
    background: transparent;
    border-bottom-color: transparent;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

/* 透明模式下：文字变白 */
.site-header.site-header-transparent {
    --header-text:            var(--header-onimage-text);
    --header-text-sub:        var(--header-onimage-text-sub);
    --header-text-hover-bg:   var(--header-onimage-hover-bg);
    --header-nav-active:      var(--header-onimage-active);
}

/* 透明模式下 Logo 白化 */
/*.site-header.site-header-transparent .brand-dot {*/
/*    filter: brightness(0) invert(1);*/
/*}*/

/* 滚动后：实色毛玻璃 */
.site-header.is-scrolled {
    background: var(--header-bg-blur);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom-color: var(--header-border);
    box-shadow: var(--header-shadow);
}

/* 滚动后颜色恢复为正常主题色 */
.site-header.site-header-transparent.is-scrolled {
    --header-text:            var(--text);
    --header-text-sub:        var(--text-sub);
    --header-text-hover-bg:   var(--header-text-hover-bg);
    --header-nav-active:      var(--primary);
}
.site-header.site-header-transparent.is-scrolled .brand-dot {
    filter: none;
}

/* ---- 左区 ---- */
.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
    justify-content: flex-start;
    min-width: 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--header-text);
    font-size: 16px;
    text-decoration: none;
    letter-spacing: -.2px;
    transition: opacity var(--transition), color var(--transition);
    flex-shrink: 0;
}
.brand:hover { opacity: .85; }

.brand-dot {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    object-fit: cover;
    display: block;
    flex-shrink: 0;
    transition: filter var(--transition);
}

/* 语言切换 */
.lang-switcher {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 8px;
    background: transparent;
    border: none;
    font-size: 13.5px;
    font-weight: 500;
    color: var(--header-text-sub);
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}
.lang-switcher:hover {
    color: var(--header-text);
    background: var(--header-text-hover-bg);
}
.lang-switcher svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}
.lang-switcher .lang-arrow {
    width: 12px;
    height: 12px;
    opacity: .6;
    transition: transform var(--transition);
}
.lang-switcher[aria-expanded="true"] .lang-arrow {
    transform: rotate(180deg);
}

/* ---- 中区导航 ---- */
.header-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    justify-content: center;
    grid-column: 2;
}

.nav-link {
    position: relative;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--header-text-sub);
    text-decoration: none;
    border-radius: 8px;
    transition: color var(--transition), background var(--transition);
    white-space: nowrap;
}
.nav-link:hover {
    color: var(--header-text);
    background: var(--header-text-hover-bg);
}

.nav-link.is-active {
    color: var(--header-text);
    font-weight: 600;
}
.nav-link.is-active::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -8px;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    border-radius: 1px;
    background: var(--header-nav-active);
    transition: background var(--transition);
}

/* ---- 右区 ---- */
.header-right {
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: flex-end;
}

/* 客户区域按钮 */
.header-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 22px;
    font-size: 13.5px;
    font-weight: 600;
    letter-spacing: .3px;
    color: #fff;
    background: var(--primary);
    border: none;
    border-radius: 999px;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 4px 16px var(--primary-glow);
    white-space: nowrap;
}
.header-cta:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 6px 22px var(--primary-glow);
}
.header-cta:active { transform: translateY(0); }

/* 用户 chip */
.user-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 12px 5px 5px;
    background: var(--header-text-hover-bg);
    border-radius: 999px;
    font-size: 13px;
    color: var(--header-text);
    transition: all var(--transition);
}

.user-chip img,
.user-chip .avatar-fallback {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 12px;
    flex-shrink: 0;
}

.user-chip .user-chip-name {
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-chip .logout {
    color: inherit;
    opacity: .6;
    font-size: 12px;
    margin-left: 4px;
    padding-left: 8px;
    border-left: 1px solid currentColor;
    text-decoration: none;
    transition: opacity var(--transition), color var(--transition), border-color var(--transition);
}
.user-chip .logout:hover {
    opacity: 1;
    color: var(--danger);
    border-left-color: var(--danger);
}

/* 主题切换按钮 */
.theme-toggle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--header-border, var(--border));
    color: var(--header-text-sub);
    transition: all var(--transition);
    flex-shrink: 0;
    cursor: pointer;
    padding: 0;
}
.theme-toggle:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: rotate(15deg);
}
.theme-toggle svg { width: 16px; height: 16px; }
[data-theme="light"] .icon-moon,
[data-theme="dark"]  .icon-sun { display: none; }

/* 透明模式下：主题按钮用白色边框 */
.site-header.site-header-transparent .theme-toggle {
    border-color: var(--header-onimage-border);
    color: var(--header-onimage-text);
}
.site-header.site-header-transparent .theme-toggle:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
/* 滚动后恢复正常 */
.site-header.site-header-transparent.is-scrolled .theme-toggle {
    border-color: var(--border);
    color: var(--text-sub);
}

/* 移动端汉堡 */
.mobile-toggle {
    display: none;
    width: 36px;
    height: 36px;
    padding: 8px;
    background: transparent;
    border: none;
    cursor: pointer;
    flex-direction: column;
    justify-content: space-between;
    border-radius: 8px;
    transition: background var(--transition);
}
.mobile-toggle:hover {
    background: var(--header-text-hover-bg);
}
.mobile-toggle span {
    display: block;
    height: 2px;
    border-radius: 1px;
    background: var(--header-text);
    transition: transform .3s ease, opacity .3s ease, background var(--transition);
}
.mobile-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.mobile-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}
.mobile-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---- 移动端抽屉 ---- */
.mobile-menu {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 14px 24px 20px;
    background: var(--header-bg);
    border-top: 1px solid var(--header-border, var(--border-light));
    border-bottom: 1px solid var(--header-border, var(--border-light));
    animation: mobileMenuSlide .25s ease;
}
.mobile-menu[hidden] { display: none; }

@keyframes mobileMenuSlide {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.mobile-nav-link {
    display: block;
    padding: 12px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--header-text);
    text-decoration: none;
    border-radius: 10px;
    transition: background var(--transition), color var(--transition);
}
.mobile-nav-link:hover {
    background: var(--header-text-hover-bg);
    color: var(--header-text);
}

.mobile-nav-cta {
    display: block;
    margin-top: 10px;
    padding: 14px 20px;
    text-align: center;
    background: var(--primary);
    color: #fff;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: background var(--transition);
}
.mobile-nav-cta:hover {
    background: var(--primary-dark);
    color: #fff;
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
    .site-header-inner {
        grid-template-columns: auto 1fr auto;
        padding: 0 20px;
        height: 64px;
    }
    .lang-switcher span:not(.lang-arrow) { display: none; }
    .lang-switcher { padding: 6px 8px; }
    .nav-link { padding: 8px 12px; font-size: 13.5px; }
    .header-cta { padding: 8px 18px; font-size: 13px; }
}

@media (max-width: 768px) {
    .site-header-inner {
        padding: 0 16px;
        height: 60px;
        grid-template-columns: auto 1fr auto;
    }

    /* 隐藏桌面导航 */
    .header-nav { display: none; }

    /* 语言切换隐藏 */
    .lang-switcher { display: none; }

    /* 显示汉堡 */
    .mobile-toggle { display: flex; }

    /* 移动端抽屉可见 */
    .mobile-menu:not([hidden]) { display: flex; }

    /* 用户 chip 简化 */
    .user-chip .user-chip-name { display: none; }
    .user-chip { padding: 4px 10px 4px 4px; gap: 6px; }

    /* CTA 缩小 */
    .header-cta { padding: 7px 16px; font-size: 12.5px; }

    /* 主题按钮缩小 */
    .theme-toggle { width: 32px; height: 32px; }
}

/* =========================================================
   站点页脚（精简版）
   ========================================================= */

.site-footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-light);
    margin-top: auto;
    color: var(--text-sub);
    transition: background var(--transition), color var(--transition);
}

/* 顶部渐变细线 */
.footer-line {
    height: 2px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--primary) 25%,
        var(--primary-dark) 50%,
        var(--primary) 75%,
        transparent 100%);
    opacity: .75;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 28px 24px 26px;
    text-align: center;
}

/* 版权 */
.footer-copyright {
    font-size: 13.5px;
    font-weight: 500;
    color: var(--text-sub);
    margin: 0 0 14px;
    letter-spacing: .2px;
}
.footer-copyright strong {
    color: var(--text);
    font-weight: 700;
}

/* 免责声明 */
.footer-disclaimer {
    font-size: 12px;
    line-height: 1.8;
    color: var(--text-muted);
    max-width: 800px;
    margin: 0 auto;
    padding-top: 14px;
    border-top: 1px dashed var(--border-light);
    letter-spacing: .1px;
}

/* 响应式 */
@media (max-width: 640px) {
    .footer-inner {
        padding: 24px 16px 22px;
    }

    .footer-copyright {
        font-size: 13px;
        margin-bottom: 12px;
    }

    .footer-disclaimer {
        font-size: 11.5px;
        line-height: 1.75;
        padding-top: 12px;
    }
}