/* =========================================================
   网址导航 - 前台样式
   心理学配色：蓝紫主色（信任/专注）+ 青绿辅色（成长）
   + 柔和暖灰背景（降低视觉疲劳）
   ========================================================= */

:root {
    /* 背景：柔和冷灰，减轻长时间浏览疲劳 */
    --bg-primary: #f3f6fb;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-elevated: #f8faff;

    /* 文字：高对比但不刺眼 */
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    --border-color: rgba(148, 163, 184, 0.22);
    --border-strong: rgba(99, 102, 241, 0.28);

    /* 主色：靛蓝 = 信任、专业 */
    --accent: #5b6cff;
    --accent-hover: #4556f5;
    --accent-soft: rgba(91, 108, 255, 0.12);
    --accent-glow: rgba(91, 108, 255, 0.28);

    /* 辅色：青绿 = 成长、平静（自营站） */
    --teal: #0d9488;
    --teal-soft: rgba(13, 148, 136, 0.12);
    --teal-border: rgba(13, 148, 136, 0.25);

    /* 暖色点缀：琥珀 = 注意力锚点（开源/星标） */
    --amber: #f59e0b;
    --amber-soft: rgba(245, 158, 11, 0.14);

    --violet: #7c3aed;
    --violet-soft: rgba(124, 58, 237, 0.12);

    --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 8px 28px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
    --shadow-card: 0 4px 18px rgba(91, 108, 255, 0.08);

    --radius: 16px;
    --radius-sm: 12px;
    --radius-xs: 10px;

    --hero-overlay: linear-gradient(
        180deg,
        rgba(15, 23, 42, 0.62) 0%,
        rgba(30, 41, 59, 0.45) 38%,
        rgba(243, 246, 251, 0.78) 78%,
        rgba(243, 246, 251, 1) 100%
    );
    --search-bg: rgba(255, 255, 255, 0.96);
    --search-border: rgba(255, 255, 255, 0.55);
    --footer-bg: #0f172a;
    --footer-text: #94a3b8;
    --tab-bg: rgba(255, 255, 255, 0.22);
    --tab-active-bg: rgba(255, 255, 255, 0.98);
    --tab-text: rgba(255, 255, 255, 0.88);
    --tab-active-text: var(--accent);
    --site-card-hover: #f5f7ff;
    --scrollbar-thumb: #cbd5e1;
    --container-pad: clamp(12px, 3vw, 24px);
}

[data-theme="dark"] {
    --bg-primary: #0b1220;
    --bg-secondary: #111827;
    --bg-card: #151d2e;
    --bg-elevated: #1a2438;
    --text-primary: #e2e8f0;
    --text-secondary: #a8b3c7;
    --text-muted: #7b879c;
    --border-color: rgba(148, 163, 184, 0.12);
    --border-strong: rgba(129, 140, 248, 0.35);
    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-soft: rgba(129, 140, 248, 0.16);
    --accent-glow: rgba(129, 140, 248, 0.25);
    --teal: #2dd4bf;
    --teal-soft: rgba(45, 212, 191, 0.12);
    --teal-border: rgba(45, 212, 191, 0.28);
    --amber: #fbbf24;
    --amber-soft: rgba(251, 191, 36, 0.14);
    --violet: #a78bfa;
    --violet-soft: rgba(167, 139, 250, 0.14);
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
    --hero-overlay: linear-gradient(
        180deg,
        rgba(2, 6, 23, 0.72) 0%,
        rgba(15, 23, 42, 0.55) 40%,
        rgba(11, 18, 32, 0.88) 80%,
        rgba(11, 18, 32, 1) 100%
    );
    --search-bg: rgba(21, 29, 46, 0.96);
    --search-border: rgba(148, 163, 184, 0.12);
    --footer-bg: #020617;
    --footer-text: #64748b;
    --tab-bg: rgba(255, 255, 255, 0.08);
    --tab-active-bg: rgba(21, 29, 46, 0.98);
    --tab-text: rgba(255, 255, 255, 0.65);
    --tab-active-text: #a5b4fc;
    --site-card-hover: #1c2740;
    --scrollbar-thumb: #334155;
}

/* ===== Global ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
        "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background:
        radial-gradient(1200px 500px at 10% -10%, rgba(91, 108, 255, 0.08), transparent 55%),
        radial-gradient(900px 420px at 95% 8%, rgba(13, 148, 136, 0.06), transparent 50%),
        var(--bg-primary);
    color: var(--text-primary);
    transition: background 0.35s ease, color 0.35s ease;
    overflow-x: hidden;
    line-height: 1.55;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; }

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: var(--container-pad);
    padding-right: var(--container-pad);
}

/* ===== Theme Toggle ===== */
.theme-toggle {
    position: absolute;
    top: max(14px, env(safe-area-inset-top));
    right: max(14px, env(safe-area-inset-right));
    z-index: 10;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    border: 1.5px solid rgba(255, 255, 255, 0.45);
    background: rgba(255, 255, 255, 0.14);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: #fff;
    font-size: 1.15rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.18);
}
.theme-toggle:hover {
    transform: scale(1.08) rotate(-8deg);
    background: rgba(255, 255, 255, 0.24);
}
.theme-toggle:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 3px;
}
[data-theme="dark"] .theme-toggle {
    border-color: rgba(255, 255, 255, 0.18);
    background: rgba(15, 23, 42, 0.55);
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: max(24px, env(safe-area-inset-bottom));
    right: max(18px, env(safe-area-inset-right));
    z-index: 1000;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(145deg, var(--accent), var(--violet));
    color: #fff;
    font-size: 1.15rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px var(--accent-glow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px) scale(0.92);
    transition: opacity 0.28s, visibility 0.28s, transform 0.28s, box-shadow 0.28s;
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}
.back-to-top:hover {
    transform: translateY(-3px) scale(1.04);
    box-shadow: 0 12px 28px var(--accent-glow);
}

/* ===== Hero ===== */
.hero-section {
    position: relative;
    /* 可由后台配置：style="--hero-bg-image: url(...)" */
    --hero-bg-image: url('../images/background.avif');
    background: var(--hero-bg-image) center / cover no-repeat;
    padding: clamp(56px, 10vw, 96px) 0 clamp(44px, 7vw, 72px);
    min-height: clamp(340px, 52vw, 460px);
    display: flex;
    align-items: center;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: var(--hero-overlay);
    z-index: 1;
}
.hero-title {
    text-align: center;
    font-size: clamp(1.75rem, 5vw, 2.85rem);
    font-weight: 800;
    color: #fff;
    text-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
    margin: 0 0 10px;
    letter-spacing: 0.04em;
    line-height: 1.2;
}
.hero-subtitle {
    text-align: center;
    color: rgba(255, 255, 255, 0.88);
    font-size: clamp(0.92rem, 2.4vw, 1.12rem);
    margin: 0 0 clamp(22px, 4vw, 36px);
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
    font-weight: 400;
}

/* ===== Search ===== */
.search-box {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}
.search-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 12px;
    justify-content: center;
    flex-wrap: wrap;
}
.search-tab {
    padding: 7px 14px;
    border: 1px solid transparent;
    border-radius: 999px;
    background: var(--tab-bg);
    color: var(--tab-text);
    font-size: 0.86rem;
    cursor: pointer;
    transition: all 0.22s ease;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: inline-flex;
    align-items: center;
    gap: 5px;
    line-height: 1.2;
}
.search-tab:hover {
    background: rgba(255, 255, 255, 0.42);
    color: #1e293b;
}
.search-tab.active {
    background: var(--tab-active-bg);
    color: var(--tab-active-text);
    font-weight: 650;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
    border-color: rgba(255, 255, 255, 0.7);
}
.search-form .input-group {
    background: var(--search-bg);
    border-radius: 999px;
    overflow: hidden;
    box-shadow: var(--shadow-lg), 0 0 0 1px var(--search-border);
    display: flex;
    align-items: stretch;
}
.search-input {
    border: none !important;
    padding: 15px 22px !important;
    font-size: 1.02rem;
    background: transparent !important;
    color: var(--text-primary) !important;
    flex: 1;
    min-width: 0;
    border-radius: 0 !important;
}
.search-input::placeholder { color: var(--text-muted); }
.search-input:focus {
    box-shadow: none !important;
    outline: none;
}
.search-btn {
    padding: 0 26px !important;
    background: linear-gradient(135deg, #5b6cff 0%, #7c3aed 100%) !important;
    color: #fff !important;
    font-weight: 650;
    border: none !important;
    font-size: 0.98rem;
    white-space: nowrap;
    transition: filter 0.2s, transform 0.2s;
    border-radius: 0 !important;
}
.search-btn:hover {
    filter: brightness(1.06);
}
.search-btn:active { transform: scale(0.98); }

/* ===== Section Title ===== */
.section-title {
    font-size: clamp(1.15rem, 2.5vw, 1.35rem);
    font-weight: 750;
    color: var(--text-primary);
    margin: 0 0 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: 0.01em;
}
.section-title i { font-size: 1.05em; }
.section-title .title-badge {
    margin-left: auto;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 4px 10px;
}

/* ===== Hot Section ===== */
.hot-section {
    background: transparent;
    padding-top: 8px;
    padding-bottom: 8px;
}
.hot-list-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) transparent;
    padding-bottom: 10px;
    margin: 0 calc(var(--container-pad) * -0.35);
    padding-left: calc(var(--container-pad) * 0.35);
    padding-right: calc(var(--container-pad) * 0.35);
}
.hot-list-wrapper::-webkit-scrollbar { height: 6px; }
.hot-list-wrapper::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 3px;
}
.hot-list-scroll {
    display: flex;
    gap: 16px;
}
.hot-card {
    flex: 1 1 0;
    min-width: min(280px, 78vw);
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow 0.28s ease, transform 0.28s ease, border-color 0.28s ease;
    border: 1px solid var(--border-color);
    opacity: 0;
    animation: fadeInUp 0.55s ease forwards;
}
.hot-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: var(--border-strong);
}
.hot-card-header {
    padding: 12px 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(180deg, var(--bg-elevated), var(--bg-card));
    border-bottom: 1px solid var(--border-color);
}
.hot-card-logo {
    width: 22px;
    height: 22px;
    object-fit: contain;
    border-radius: 6px;
    flex-shrink: 0;
}
.hot-card-name {
    font-weight: 750;
    font-size: 0.92rem;
}
.hot-card-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: auto;
}
.hot-refresh-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px 6px;
    font-size: 0.95rem;
    line-height: 1;
    border-radius: 8px;
    transition: color 0.2s, background 0.2s;
    display: flex;
    align-items: center;
    margin-left: 2px;
}
.hot-refresh-btn:hover {
    color: var(--accent);
    background: var(--accent-soft);
}
.hot-refresh-btn.spinning i {
    animation: spin 0.6s linear infinite;
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.hot-card-body {
    height: min(320px, 48vh);
    overflow-y: auto;
    padding: 6px 0;
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) transparent;
}
.hot-card-body::-webkit-scrollbar { width: 4px; }
.hot-card-body::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 2px;
}
.hot-item {
    display: flex;
    align-items: baseline;
    padding: 8px 14px;
    gap: 10px;
    transition: background 0.15s;
    cursor: pointer;
}
.hot-item:hover { background: var(--site-card-hover); }
.hot-rank {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 800;
    color: #fff;
    background: #94a3b8;
}
.hot-rank.top1 { background: linear-gradient(135deg, #ef4444, #f97316); }
.hot-rank.top2 { background: linear-gradient(135deg, #f97316, #f59e0b); }
.hot-rank.top3 { background: linear-gradient(135deg, #eab308, #f59e0b); }
.hot-text {
    flex: 1;
    font-size: 0.84rem;
    line-height: 1.45;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.hot-heat {
    flex-shrink: 0;
    font-size: 0.72rem;
    color: var(--text-muted);
    white-space: nowrap;
}
.hot-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
}
.hot-empty a { color: var(--accent); }

/* ===== Navigation / Cards ===== */
.nav-section {
    background: transparent;
    padding: clamp(20px, 4vw, 36px) 0 clamp(12px, 3vw, 24px);
}
.nav-category {
    background: var(--bg-card);
    border-radius: calc(var(--radius) + 4px);
    padding: clamp(16px, 3vw, 28px);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: clamp(16px, 3vw, 24px);
    position: relative;
    overflow: hidden;
    opacity: 0;
    animation: fadeInUp 0.55s ease forwards;
}
.nav-category::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--violet), var(--teal));
    opacity: 0.9;
}
.nav-category.sites-category::before {
    background: linear-gradient(90deg, var(--teal), #22d3ee, var(--accent));
}
.nav-category.projects-category::before {
    background: linear-gradient(90deg, var(--violet), var(--accent), #38bdf8);
}

/* 通用卡片底座 */
.site-card {
    display: flex;
    text-decoration: none;
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease, background 0.28s ease;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
    height: 100%;
    min-height: 100%;
}
.site-card:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.site-icon {
    object-fit: contain;
    flex-shrink: 0;
    background: var(--bg-elevated);
}
.search-tab-icon {
    width: 14px;
    height: 14px;
    object-fit: contain;
    vertical-align: -1px;
    border-radius: 2px;
}
.site-info { flex: 1; min-width: 0; }
.site-name {
    font-weight: 750;
    line-height: 1.35;
    color: var(--text-primary);
    transition: color 0.2s;
}
.site-desc {
    color: var(--text-muted);
    line-height: 1.5;
    margin-top: 4px;
}
.tooltip {
    --bs-tooltip-max-width: 280px;
    --bs-tooltip-font-size: 0.78rem;
}

/* ---------- 自营站点：大卡片（青绿信任感） ---------- */
.sites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr));
    gap: 16px;
}
.site-card-feature {
    flex-direction: column;
    align-items: stretch;
    padding: 0;
    background:
        linear-gradient(160deg, rgba(13, 148, 136, 0.07), transparent 42%),
        linear-gradient(340deg, rgba(91, 108, 255, 0.06), transparent 48%),
        var(--bg-secondary);
    box-shadow: var(--shadow-card);
}
.site-card-feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 16px 36px rgba(13, 148, 136, 0.14), var(--shadow-md);
    border-color: var(--teal-border);
    background:
        linear-gradient(160deg, rgba(13, 148, 136, 0.12), transparent 45%),
        linear-gradient(340deg, rgba(91, 108, 255, 0.1), transparent 50%),
        var(--bg-secondary);
}
.site-card-feature:hover .site-name { color: var(--teal); }
.site-card-feature:hover .card-arrow {
    opacity: 1;
    transform: translateX(0);
    color: var(--teal);
}
.site-card-feature .card-top {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 18px 10px;
}
.site-card-feature .icon-wrap {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    background: linear-gradient(145deg, var(--teal-soft), var(--accent-soft));
    border: 1px solid var(--teal-border);
    flex-shrink: 0;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45);
}
.site-card-feature .site-icon {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: transparent;
}
.site-card-feature .site-name {
    font-size: 1.02rem;
    display: flex;
    align-items: center;
    gap: 6px;
}
.site-card-feature .site-desc {
    font-size: 0.82rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    padding: 0 18px 16px;
    min-height: 2.7em;
}
.site-card-feature .card-footer {
    margin-top: auto;
    padding: 10px 18px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px dashed var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
}
.site-card-feature .card-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 9px;
    border-radius: 999px;
    background: var(--teal-soft);
    color: var(--teal);
    font-weight: 650;
}
.card-arrow {
    opacity: 0.45;
    transform: translateX(-4px);
    transition: opacity 0.22s, transform 0.22s, color 0.22s;
    font-size: 1rem;
}

/* ---------- 开源项目：仓库风格卡片（紫蓝专注感） ---------- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr));
    gap: 14px;
}
.site-card-project {
    flex-direction: column;
    align-items: stretch;
    padding: 16px 16px 14px;
    background:
        linear-gradient(145deg, rgba(124, 58, 237, 0.06), transparent 50%),
        var(--bg-secondary);
    box-shadow: var(--shadow-sm);
}
.site-card-project:hover {
    transform: translateY(-4px);
    border-color: rgba(124, 58, 237, 0.35);
    box-shadow: 0 14px 32px rgba(124, 58, 237, 0.12), var(--shadow-md);
    background:
        linear-gradient(145deg, rgba(124, 58, 237, 0.12), transparent 52%),
        var(--bg-secondary);
}
.site-card-project:hover .site-name { color: var(--violet); }
.site-card-project:hover .card-arrow {
    opacity: 1;
    transform: translateX(0);
    color: var(--violet);
}
.site-card-project .card-top {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.site-card-project .icon-wrap {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: var(--violet-soft);
    border: 1px solid rgba(124, 58, 237, 0.22);
    flex-shrink: 0;
}
.site-card-project .site-icon {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    background: transparent;
}
.site-card-project .site-name {
    font-size: 0.95rem;
    margin-bottom: 2px;
}
.site-card-project .site-desc {
    font-size: 0.78rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-top: 10px;
    min-height: 3.5em;
    flex: 1;
}
.site-card-project .card-footer {
    margin-top: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}
.site-card-project .card-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 9px;
    border-radius: 999px;
    background: var(--amber-soft);
    color: #b45309;
    font-size: 0.72rem;
    font-weight: 650;
}
[data-theme="dark"] .site-card-project .card-tag {
    color: var(--amber);
}

/* ---------- 实用工具 / 友情链接：小卡片 ---------- */
.tools-grid,
.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 140px), 1fr));
    gap: 12px;
}
.nav-category.tools-category::before {
    background: linear-gradient(90deg, var(--accent), #38bdf8, var(--teal));
}
.nav-category.links-category::before {
    background: linear-gradient(90deg, #0ea5e9, #6366f1, #a78bfa);
}
.site-card-sm {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
    padding: 14px 14px;
    min-height: 56px;
    background: var(--bg-secondary);
}
.site-card-sm .site-icon {
    width: 20px;
    height: 20px;
    border-radius: 4px;
}
.site-card-sm .site-name {
    font-size: 0.9rem;
    font-weight: 650;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.site-card-sm:hover {
    transform: translateY(-3px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
    color: var(--accent);
    background: var(--site-card-hover);
}
.site-card-sm:hover .site-name { color: var(--accent); }

/* ===== 子页面（申请/留言/关于/联系）
   心理配色：
   - indigo 关于：信任 / 专业
   - teal   收录：成长 / 平静 / 安全
   - violet 留言：创意 / 表达
   - amber  联系：温暖 / 亲和 / 注意力
   页头：普通文档流，不悬浮（非 sticky / fixed）
   ===== */
.subpage {
    --sp-accent: #5b6cff;
    --sp-accent-2: #7c3aed;
    --sp-accent-soft: rgba(91, 108, 255, 0.12);
    --sp-accent-glow: rgba(91, 108, 255, 0.28);
    --sp-header-from: #3730a3;
    --sp-header-mid: #5b6cff;
    --sp-header-to: #0d9488;
    --sp-header-shadow: rgba(67, 56, 202, 0.22);
    --sp-on-accent: #fff;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background:
        radial-gradient(ellipse 90% 55% at 8% -12%, color-mix(in srgb, var(--sp-accent) 18%, transparent), transparent 58%),
        radial-gradient(ellipse 70% 45% at 100% 0%, color-mix(in srgb, var(--sp-accent-2) 12%, transparent), transparent 52%),
        radial-gradient(circle at 50% 100%, rgba(148, 163, 184, 0.08), transparent 45%),
        var(--bg-primary);
}
.subpage-tone-teal {
    --sp-accent: #0d9488;
    --sp-accent-2: #14b8a6;
    --sp-accent-soft: rgba(13, 148, 136, 0.12);
    --sp-accent-glow: rgba(13, 148, 136, 0.28);
    --sp-header-from: #115e59;
    --sp-header-mid: #0d9488;
    --sp-header-to: #2dd4bf;
    --sp-header-shadow: rgba(13, 148, 136, 0.24);
}
.subpage-tone-violet {
    --sp-accent: #7c3aed;
    --sp-accent-2: #a78bfa;
    --sp-accent-soft: rgba(124, 58, 237, 0.12);
    --sp-accent-glow: rgba(124, 58, 237, 0.28);
    --sp-header-from: #5b21b6;
    --sp-header-mid: #7c3aed;
    --sp-header-to: #c4b5fd;
    --sp-header-shadow: rgba(124, 58, 237, 0.24);
}
.subpage-tone-amber {
    --sp-accent: #d97706;
    --sp-accent-2: #fbbf24;
    --sp-accent-soft: rgba(245, 158, 11, 0.14);
    --sp-accent-glow: rgba(245, 158, 11, 0.26);
    --sp-header-from: #92400e;
    --sp-header-mid: #f59e0b;
    --sp-header-to: #fde68a;
    --sp-header-shadow: rgba(180, 83, 9, 0.22);
    --sp-on-accent: #1e293b;
}

/* 页头：不悬浮，随页面滚动 */
.subpage-header {
    position: relative;
    z-index: 10;
    flex-shrink: 0;
    color: #fff;
    padding: 14px 0;
    background: linear-gradient(125deg, var(--sp-header-from) 0%, var(--sp-header-mid) 48%, var(--sp-header-to) 100%);
    box-shadow: 0 10px 32px var(--sp-header-shadow);
}
.subpage-header::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 28px;
    pointer-events: none;
    background: linear-gradient(180deg, transparent, rgba(15, 23, 42, 0.06));
    opacity: 0.45;
}
.subpage-header-inner {
    display: flex;
    align-items: center;
    gap: 12px 16px;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}
.subpage-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: #fff;
    text-decoration: none;
    min-width: 0;
}
.subpage-brand:hover { color: #fff; opacity: 0.96; }
.subpage-brand-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    background: rgba(255, 255, 255, 0.16);
    border: 1px solid rgba(255, 255, 255, 0.28);
    box-shadow: 0 4px 14px rgba(15, 23, 42, 0.12);
    flex-shrink: 0;
}
.subpage-brand-text {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
}
.subpage-brand-name {
    font-weight: 780;
    font-size: 1.02rem;
    letter-spacing: -0.01em;
    line-height: 1.25;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: min(52vw, 280px);
}
.subpage-brand-tag {
    font-size: 0.7rem;
    font-weight: 650;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    opacity: 0.78;
    line-height: 1.2;
}
.subpage-header-actions {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}
.subpage-theme {
    position: static !important;
    top: auto !important;
    right: auto !important;
    width: 40px;
    height: 40px;
    margin: 0 !important;
    border: 1px solid rgba(255, 255, 255, 0.28);
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
    box-shadow: none;
    transform: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}
.subpage-theme:hover {
    background: rgba(255, 255, 255, 0.24);
    color: #fff;
    transform: none;
}
.subpage-nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    transition: background 0.2s;
}
.subpage-nav-toggle:hover {
    background: rgba(255, 255, 255, 0.24);
}
.subpage-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    flex: 1 1 auto;
    align-items: center;
    justify-content: flex-end;
    min-width: 0;
}
.subpage-nav a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.86rem;
    font-weight: 650;
    padding: 8px 13px;
    border-radius: 999px;
    border: 1px solid transparent;
    transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
    text-decoration: none;
    white-space: nowrap;
}
.subpage-nav a i {
    font-size: 0.95rem;
    opacity: 0.9;
}
.subpage-nav a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.12);
    text-decoration: none;
}
.subpage-nav a.is-active {
    color: var(--sp-header-from);
    background: rgba(255, 255, 255, 0.96);
    border-color: rgba(255, 255, 255, 0.9);
    box-shadow: 0 4px 14px rgba(15, 23, 42, 0.12);
}
.subpage-tone-amber .subpage-nav a.is-active {
    color: #92400e;
}

.subpage-main {
    flex: 1;
    padding: clamp(20px, 4vw, 40px) 0 clamp(32px, 6vw, 52px);
}
.subpage-shell {
    max-width: 980px;
    margin: 0 auto;
    width: 100%;
}
.subpage-hero {
    display: flex;
    align-items: flex-start;
    gap: clamp(14px, 3vw, 20px);
    margin-bottom: clamp(16px, 3vw, 22px);
    padding: 4px 2px;
    animation: fadeInUp 0.45s ease both;
}
.subpage-hero-icon {
    flex-shrink: 0;
    width: clamp(56px, 8vw, 68px);
    height: clamp(56px, 8vw, 68px);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(1.45rem, 3vw, 1.75rem);
    color: #fff;
    background: linear-gradient(145deg, var(--sp-accent), var(--sp-accent-2));
    box-shadow: 0 14px 32px var(--sp-accent-glow);
}
.subpage-tone-amber .subpage-hero-icon {
    color: var(--sp-on-accent);
}
.subpage-hero-text { min-width: 0; flex: 1; }
.subpage-kicker {
    margin: 0 0 6px;
    font-size: 0.78rem;
    font-weight: 750;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--sp-accent);
    opacity: 0.9;
}
.subpage-title {
    font-size: clamp(1.4rem, 3.4vw, 1.9rem);
    font-weight: 850;
    margin: 0 0 8px;
    color: var(--text-primary);
    letter-spacing: -0.025em;
    line-height: 1.22;
}
.subpage-lead {
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.72;
    font-size: clamp(0.92rem, 2.2vw, 1rem);
    max-width: 44em;
}
.subpage-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: calc(var(--radius) + 6px);
    box-shadow: var(--shadow-lg), 0 1px 0 rgba(255, 255, 255, 0.55) inset;
    padding: clamp(18px, 3.5vw, 36px);
    animation: fadeInUp 0.5s ease 0.05s both;
    overflow: hidden;
    position: relative;
}
.subpage-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--sp-accent), var(--sp-accent-2));
    opacity: 0.9;
}
.subpage-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(220px, 0.72fr);
    gap: clamp(16px, 3vw, 24px);
    align-items: start;
}
.subpage-main-col { min-width: 0; }
.subpage-side {
    display: flex;
    flex-direction: column;
    gap: 14px;
    position: static;
}
.info-panel {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 16px 18px;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.info-panel:hover {
    border-color: color-mix(in srgb, var(--sp-accent) 28%, var(--border-color));
    box-shadow: var(--shadow-sm);
}
.info-panel-soft {
    background: linear-gradient(160deg, var(--sp-accent-soft), transparent 72%);
}
.subpage-steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 22px;
}
.subpage-step {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    border-radius: 14px;
    border: 1px solid var(--border-color);
    background: linear-gradient(180deg, var(--bg-elevated), var(--bg-card));
}
.subpage-step-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, var(--sp-accent), var(--sp-accent-2));
    flex-shrink: 0;
}
.subpage-tone-amber .subpage-step-num {
    color: var(--sp-on-accent);
}
.subpage-step-text {
    font-size: 0.82rem;
    font-weight: 650;
    color: var(--text-secondary);
    line-height: 1.35;
}
.info-panel h3 {
    margin: 0 0 10px;
    font-size: 0.95rem;
    font-weight: 750;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.info-panel h3 i { color: var(--sp-accent); }
.info-panel ul {
    margin: 0;
    padding-left: 1.1em;
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.75;
}
.info-panel p {
    margin: 0 0 10px;
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.7;
}
.side-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--accent);
    text-decoration: none;
}
.side-link:hover { color: var(--accent-hover); gap: 8px; }

.subpage-form .form-group {
    margin-bottom: 16px;
}
.subpage-form label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.88rem;
    font-weight: 650;
    margin-bottom: 7px;
    color: var(--text-secondary);
}
.subpage-form label i {
    opacity: 0.75;
    font-size: 0.95rem;
}
.subpage-form .req { color: #ef4444; }
.email-code-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
    align-items: stretch;
}
.email-code-row input {
    min-width: 0;
}
.btn-send-code {
    border: none;
    border-radius: 12px;
    padding: 0 16px;
    font: inherit;
    font-size: 0.88rem;
    font-weight: 700;
    color: #fff;
    white-space: nowrap;
    cursor: pointer;
    background: linear-gradient(135deg, var(--sp-accent), var(--sp-accent-2));
    box-shadow: 0 6px 16px var(--sp-accent-glow);
    transition: filter 0.15s, opacity 0.15s, transform 0.15s;
}
.subpage-tone-amber .btn-send-code {
    color: var(--sp-on-accent);
}
.btn-send-code:hover:not(:disabled) {
    filter: brightness(1.05);
    transform: translateY(-1px);
}
.btn-send-code:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    box-shadow: none;
}
.field-hint {
    margin: 8px 0 0;
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.45;
}
.field-hint.is-ok { color: #047857; }
.field-hint.is-err { color: #b91c1c; }
@media (max-width: 480px) {
    .email-code-row {
        grid-template-columns: 1fr;
    }
    .btn-send-code {
        padding: 12px 16px;
    }
}
.subpage-form input,
.subpage-form textarea {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 14px;
    font-size: 0.95rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.subpage-form textarea {
    resize: vertical;
    min-height: 110px;
    line-height: 1.6;
}
.subpage-form input:hover,
.subpage-form textarea:hover {
    border-color: color-mix(in srgb, var(--sp-accent) 40%, var(--border-color));
}
.subpage-form input:focus,
.subpage-form textarea:focus {
    border-color: var(--sp-accent);
    box-shadow: 0 0 0 4px var(--sp-accent-soft);
    background: var(--bg-card);
}
.subpage .side-link { color: var(--sp-accent); }
.subpage .side-link:hover {
    color: color-mix(in srgb, var(--sp-accent) 80%, #000);
}
.subpage-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}
.btn-primary-lg {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 6px;
    padding: 13px 28px;
    border: none;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--sp-accent, #5b6cff), var(--sp-accent-2, #7c3aed));
    color: #fff;
    font-weight: 700;
    font-size: 0.98rem;
    cursor: pointer;
    box-shadow: 0 10px 26px var(--sp-accent-glow, var(--accent-glow));
    transition: transform 0.2s, filter 0.2s, box-shadow 0.2s;
    text-decoration: none;
    width: auto;
    max-width: 100%;
}
.subpage-tone-amber .btn-primary-lg {
    color: var(--sp-on-accent);
}
.btn-primary-lg:hover {
    filter: brightness(1.05);
    transform: translateY(-2px);
    color: #fff;
    box-shadow: 0 14px 30px var(--sp-accent-glow, var(--accent-glow));
}
.subpage-tone-amber .btn-primary-lg:hover { color: var(--sp-on-accent); }
.btn-ghost-lg {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px 22px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 650;
    font-size: 0.95rem;
    text-decoration: none;
    transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.btn-ghost-lg:hover {
    border-color: var(--sp-accent, var(--accent));
    color: var(--sp-accent, var(--accent));
    background: var(--sp-accent-soft, var(--accent-soft));
}

.subpage-success,
.subpage-empty {
    text-align: center;
    padding: 18px 8px 8px;
}
.subpage-success-icon,
.subpage-empty-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 16px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}
.subpage-success-icon {
    color: #059669;
    background: rgba(16, 185, 129, 0.12);
    box-shadow: 0 0 0 8px rgba(16, 185, 129, 0.06);
}
.subpage-empty-icon {
    color: #b45309;
    background: rgba(245, 158, 11, 0.12);
    box-shadow: 0 0 0 8px rgba(245, 158, 11, 0.06);
}
.subpage-success h2,
.subpage-empty h2 {
    margin: 0 0 8px;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-primary);
}
.subpage-success p,
.subpage-empty p {
    margin: 0 auto 20px;
    max-width: 28em;
    color: var(--text-secondary);
    line-height: 1.7;
}
.subpage-success-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.subpage-prose {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 1rem;
    margin-bottom: 0;
}
.subpage-meta { color: var(--text-muted); font-size: 0.88rem; }

/* 关于我们 */
.about-layout { display: flex; flex-direction: column; gap: clamp(18px, 3vw, 24px); }
.about-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    border-radius: 999px;
    background: var(--sp-accent-soft, var(--accent-soft));
    color: var(--sp-accent, var(--accent));
    font-weight: 750;
    font-size: 0.85rem;
    margin-bottom: 14px;
    border: 1px solid color-mix(in srgb, var(--sp-accent, var(--accent)) 18%, transparent);
}
.about-prose { font-size: clamp(0.95rem, 2.2vw, 1.05rem); }
.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(10px, 2vw, 14px);
}
.feature-card {
    padding: clamp(16px, 3vw, 20px) clamp(14px, 2.5vw, 18px);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: linear-gradient(165deg, var(--bg-elevated), var(--bg-card));
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    min-width: 0;
}
.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: color-mix(in srgb, var(--sp-accent, var(--accent)) 30%, var(--border-color));
}
.feature-icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.18rem;
    margin-bottom: 12px;
}
.feature-icon.teal { background: var(--teal-soft); color: var(--teal); }
.feature-icon.violet { background: var(--violet-soft); color: var(--violet); }
.feature-icon.amber { background: var(--amber-soft); color: #d97706; }
.feature-icon.indigo { background: var(--accent-soft); color: var(--accent); }
.feature-card h3 {
    margin: 0 0 6px;
    font-size: 1rem;
    font-weight: 750;
    color: var(--text-primary);
}
.feature-card p {
    margin: 0;
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.65;
}
.about-cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.about-footer-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    padding-top: 12px;
    border-top: 1px dashed var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}
.about-footer-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* 联系我们 */
.contact-layout { display: flex; flex-direction: column; gap: clamp(16px, 3vw, 22px); }
.contact-intro { margin-bottom: 0; }
.contact-cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(10px, 2vw, 14px);
}
.contact-card {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: clamp(16px, 3vw, 20px) clamp(14px, 2.5vw, 18px);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: linear-gradient(165deg, var(--bg-elevated), var(--bg-card));
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    min-width: 0;
}
.contact-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: color-mix(in srgb, var(--sp-accent, var(--accent)) 32%, var(--border-color));
    color: inherit;
}
.contact-card-static {
    cursor: default;
}
.contact-card-static:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--border-color);
}
.contact-card-icon {
    width: 50px;
    height: 50px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.28rem;
    flex-shrink: 0;
}
.contact-card-icon.email { background: var(--accent-soft); color: var(--accent); }
.contact-card-icon.message { background: var(--violet-soft); color: var(--violet); }
.contact-card-icon.apply { background: var(--teal-soft); color: var(--teal); }
.contact-card-icon.about { background: var(--amber-soft); color: #d97706; }
.contact-card-body { min-width: 0; }
.contact-card-body h3 {
    margin: 0 0 4px;
    font-size: 1rem;
    font-weight: 750;
    color: var(--text-primary);
}
.contact-card-body p {
    margin: 0 0 8px;
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.55;
    word-break: break-word;
    overflow-wrap: anywhere;
}
.contact-card-cta {
    font-size: 0.86rem;
    font-weight: 700;
    color: var(--sp-accent, var(--accent));
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.contact-card-cta.muted {
    color: var(--text-muted);
    font-weight: 600;
}
.contact-card:hover .contact-card-cta { gap: 8px; }
.contact-note { margin-top: 2px; }

.alert {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 12px 14px;
    border-radius: 12px;
    margin-bottom: 16px;
    font-size: 0.92rem;
    line-height: 1.55;
}
.alert i { margin-top: 2px; flex-shrink: 0; }
.alert-success { background: rgba(16, 185, 129, 0.12); color: #047857; border: 1px solid rgba(16, 185, 129, 0.25); }
.alert-danger { background: rgba(239, 68, 68, 0.1); color: #b91c1c; border: 1px solid rgba(239, 68, 68, 0.22); }
.alert-warning { background: rgba(245, 158, 11, 0.12); color: #b45309; border: 1px solid rgba(245, 158, 11, 0.25); }
[data-theme="dark"] .subpage-card {
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
    border-color: rgba(255, 255, 255, 0.08);
}
[data-theme="dark"] .info-panel,
[data-theme="dark"] .feature-card,
[data-theme="dark"] .contact-card,
[data-theme="dark"] .subpage-step {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.08);
}
[data-theme="dark"] .alert-success { color: #6ee7b7; }
[data-theme="dark"] .alert-danger { color: #fca5a5; }
[data-theme="dark"] .alert-warning { color: #fcd34d; }
[data-theme="dark"] .subpage-nav a.is-active {
    color: var(--sp-header-from);
}
[data-theme="dark"] .btn-ghost-lg {
    background: rgba(255, 255, 255, 0.04);
}
[data-theme="dark"] .subpage-brand-tag { opacity: 0.72; }

/* ===== Footer ===== */
.site-footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: clamp(28px, 5vw, 40px) 0 clamp(20px, 4vw, 28px);
    margin-top: clamp(20px, 4vw, 40px);
}
.footer-links {
    display: flex;
    justify-content: center;
    gap: clamp(14px, 4vw, 28px);
    flex-wrap: wrap;
    margin-bottom: 18px;
}
.footer-links a {
    color: var(--footer-text);
    font-size: 0.92rem;
    transition: color 0.22s;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.footer-links a:hover { color: #fff; }
.footer-copy {
    text-align: center;
    font-size: 0.84rem;
    color: #64748b;
    line-height: 1.8;
}
.footer-copy p { margin: 0; }
.footer-extra {
    margin-top: 6px !important;
    opacity: 0.88;
    font-size: 0.8rem;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: translateY(0); }
}
.hot-card:nth-child(1) { animation-delay: 0.04s; }
.hot-card:nth-child(2) { animation-delay: 0.1s; }
.hot-card:nth-child(3) { animation-delay: 0.16s; }
.hot-card:nth-child(4) { animation-delay: 0.22s; }
.nav-category.sites-category { animation-delay: 0.12s; }
.nav-category.projects-category { animation-delay: 0.18s; }

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
    .hot-list-scroll { min-width: max-content; }
    .hot-card {
        flex: none;
        width: 280px;
        min-width: 280px;
    }
    .sites-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .projects-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .subpage-grid {
        grid-template-columns: 1fr;
    }
    .subpage-side {
        position: static;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
    }
    .subpage-header-inner {
        gap: 10px 12px;
    }
    .subpage-nav {
        justify-content: flex-start;
        flex: 1 1 100%;
        order: 3;
    }
    .contact-cards {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 767.98px) {
    .tools-grid,
    .links-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .subpage-form .form-row {
        grid-template-columns: 1fr;
    }
    .subpage-header {
        padding: 12px 0;
    }
    .subpage-header-inner {
        display: grid;
        grid-template-columns: 1fr auto;
        align-items: center;
        gap: 10px;
    }
    .subpage-brand { grid-column: 1; grid-row: 1; }
    .subpage-header-actions {
        grid-column: 2;
        grid-row: 1;
        margin-left: 0;
    }
    .subpage-nav-toggle {
        display: inline-flex;
    }
    .subpage-nav {
        display: none;
        grid-column: 1 / -1;
        grid-row: 2;
        width: 100%;
        order: unset;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        padding: 8px 0 2px;
        animation: fadeInUp 0.25s ease both;
    }
    .subpage-nav.is-open {
        display: flex;
    }
    .subpage-nav a {
        width: 100%;
        justify-content: flex-start;
        padding: 11px 14px;
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.1);
        border-color: rgba(255, 255, 255, 0.08);
    }
    .subpage-nav a.is-active {
        background: rgba(255, 255, 255, 0.96);
    }
    .subpage-brand-name {
        max-width: min(58vw, 220px);
        font-size: 0.95rem;
    }
    .subpage-brand-tag { display: none; }
    .subpage-hero {
        flex-direction: row;
        align-items: center;
        gap: 12px;
    }
    .subpage-hero-icon {
        width: 52px;
        height: 52px;
        font-size: 1.35rem;
        border-radius: 16px;
    }
    .subpage-side {
        grid-template-columns: 1fr;
    }
    .subpage-steps {
        grid-template-columns: 1fr;
    }
    .feature-grid,
    .contact-cards {
        grid-template-columns: 1fr;
    }
    .about-cta-row .btn-primary-lg,
    .about-cta-row .btn-ghost-lg,
    .subpage-success-actions .btn-primary-lg,
    .subpage-success-actions .btn-ghost-lg,
    .subpage-form .btn-primary-lg {
        width: 100%;
    }
    .subpage-card {
        border-radius: 18px;
        padding: 18px 16px;
    }
    .subpage-success-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .hero-section {
        min-height: 300px;
        padding-top: 48px;
        padding-bottom: 36px;
    }
    .search-tab {
        padding: 6px 11px;
        font-size: 0.8rem;
    }
    .search-input {
        padding: 13px 16px !important;
        font-size: 0.95rem;
    }
    .search-btn {
        padding: 0 16px !important;
        font-size: 0.9rem;
    }
    .hot-card {
        width: min(270px, 82vw);
        min-width: min(270px, 82vw);
    }
    .hot-card-body { height: 260px; }
    .sites-grid,
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .site-card-feature .card-top { padding: 16px 16px 8px; }
    .site-card-feature .site-desc { padding: 0 16px 14px; }
    .site-card-feature .card-footer { padding: 10px 16px 12px; }
    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    .back-to-top {
        width: 42px;
        height: 42px;
    }
    /* 触摸设备：始终显示箭头提示 */
    .card-arrow {
        opacity: 0.7;
        transform: none;
    }
}

@media (max-width: 575.98px) {
    .search-tabs { gap: 4px; }
    .search-tab {
        padding: 5px 9px;
        font-size: 0.76rem;
    }
    .search-btn span { display: none; }
    .section-title .title-badge { display: none; }
    .nav-category { padding: 14px; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* 主题平滑 */
.hero-section, .hot-section, .nav-section, .nav-category, .hot-card,
.site-card, .site-footer, .search-form .input-group, .search-tab {
    transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}