/* 主题变量 */
:root {
    --bg-gradient: radial-gradient(1200px 600px at 10% -10%, #e0f7fa 0%, transparent 60%),
                   radial-gradient(900px 600px at 100% 0%, #f3e5f5 0%, transparent 60%),
                   linear-gradient(180deg, #ffffff, #f9fbff);
    --text-main: #1a1a1a;
    --text-muted: #61707a;
    --card-bg: #ffffff;
    --card-border: #e6eef3;
    --primary: #2962ff;
    --primary-weak: #e8f0fe;
    --shadow: 0 10px 30px rgba(0,0,0,0.06);
}

/* 全局与背景 */
* { box-sizing: border-box; }
html, body {
    height: 100%;
}
body {
    margin: 0;
    color: var(--text-main);
    background: var(--bg-gradient);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Ubuntu, "Noto Sans", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 16px;
}

/* 顶部个人信息区域 */
.hero {
    padding: 48px 0 24px;
}
.hero-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    text-align: center;
}
.avatar {
    width: 108px;
    height: 108px;
    border-radius: 50%;
    border: 4px solid #fff;
    box-shadow: var(--shadow);
    object-fit: cover;
    background: #f0f4f8;
}
.nickname {
    margin: 0;
    font-size: 24px;
    font-weight: 700;
}
.socials {
    display: flex;
    gap: 10px;
}
.social-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border: 1px solid var(--card-border);
    border-radius: 999px;
    background: var(--card-bg);
    color: var(--text-main);
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.social-btn svg { flex-shrink: 0; }
.social-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 26px rgba(0,0,0,0.08);
    background: var(--primary-weak);
}
.social-btn.wechat span { color: #0f9d58; }
.social-btn.qq span { color: #2962ff; }

/* Tabs */
.tabs {
    display: flex;
    gap: 8px;
    padding: 8px 0 16px;
    justify-content: center; /* 水平居中 */
}
.tab-btn {
    padding: 10px 16px;
    border-radius: 10px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    cursor: pointer;
    font-weight: 600;
    color: var(--text-muted);
    transition: background .12s ease, color .12s ease, box-shadow .12s ease;
}
.tab-btn.active {
    color: var(--text-main);
    background: var(--primary-weak);
    box-shadow: var(--shadow);
}

/* 面板 */
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* 导航卡片网格 */
.link-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}
.link-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px;
    border: 1px solid var(--card-border);
    border-radius: 14px;
    background: var(--card-bg);
    text-decoration: none;
    color: var(--text-main);
    box-shadow: var(--shadow);
    transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease;
}
.link-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 30px rgba(0,0,0,0.08);
    border-color: #d9e4ea;
}
.link-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: #f5f8ff;
    font-size: 22px;
}
/* 新增：图片图标样式（保持布局） */
.link-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 10px;
}
.link-info h3 {
    margin: 0 0 6px;
    font-size: 16px;
}
.link-info p {
    margin: 0;
    color: var(--text-muted);
    font-size: 13px;
}

/* 动态列表 */
.feed-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 12px;
}
.feed-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    align-items: start;
    gap: 12px;
    padding: 14px;
    border: 1px solid var(--card-border);
    border-radius: 14px;
    background: var(--card-bg);
    box-shadow: var(--shadow);
}
.feed-item time {
    color: var(--text-muted);
    font-size: 13px;
}
.feed-content {
    font-size: 15px;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
}
.modal.show { display: flex; }
.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.35);
}
.modal-content {
    position: relative;
    z-index: 2;
    width: min(90vw, 420px);
    border-radius: 16px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
    padding: 18px;
    text-align: center;
}
.modal-content img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    background: #fff;
    border: 1px dashed #e5eaf0;
}
.modal-close {
    position: absolute;
    right: 8px;
    top: 6px;
    font-size: 22px;
    line-height: 22px;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    cursor: pointer;
}
.qr-title {
    margin: 10px 0 0;
    color: var(--text-muted);
    font-size: 14px;
}

/* 响应式 */
@media (max-width: 768px) {
    .hero { padding: 36px 0 18px; }
    .avatar { width: 86px; height: 86px; }
    .nickname { font-size: 20px; }
    .link-grid { grid-template-columns: repeat(2, 1fr); }
    .feed-item { grid-template-columns: 100px 1fr; }
}
@media (max-width: 480px) {
    .link-grid { grid-template-columns: repeat(2, 1fr); }
    .link-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 12px;
        min-height: 132px;
        justify-content: center;
    }
    .link-icon {
        width: 52px;
        height: 52px;
        font-size: 24px;
    }
    .feed-item { grid-template-columns: 1fr; }
}

/* 页脚 */
.footer {
    padding: 24px 0 40px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

/* 主题切换按钮 */
.theme-toggle {
    margin-top: 6px;
    padding: 8px 12px;
    border: 1px solid var(--card-border);
    border-radius: 999px;
    background: var(--card-bg);
    color: var(--text-main);
    box-shadow: var(--shadow);
    cursor: pointer;
    font-weight: 600;
    transition: transform .12s ease, box-shadow .12s ease, background .12s ease, color .12s ease;
}
.theme-toggle:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 26px rgba(0,0,0,0.08);
    background: var(--primary-weak);
}

/* 主题切换开关（Switch） */
.theme-switch {
    margin-top: 6px;
}
.switch {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}
.switch-text {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 14px;
}
.switch input {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
    pointer-events: none;
}
.track {
    position: relative;
    width: 56px;
    height: 30px;
    border-radius: 999px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px 6px;
    transition: background-color .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.thumb {
    position: absolute;
    left: 4px;
    top: 4px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--primary-weak);
    transition: transform .18s ease, background .18s ease;
}
.icon {
    font-size: 16px;
    line-height: 1;
}
.icon.sun { position: absolute; left: 10px; }
.icon.moon { position: absolute; right: 10px; color: var(--primary); }
.switch input:checked + .track .thumb {
    transform: translateX(26px);
    background: var(--primary);
}
.switch:hover .track {
    box-shadow: 0 12px 26px rgba(0,0,0,0.08);
}
/* 暗黑主题变量覆盖（保持不变，可已存在） */
:root.dark {
    --bg-gradient: radial-gradient(1200px 600px at 10% -10%, #0b1220 0%, transparent 60%),
                   radial-gradient(900px 600px at 100% 0%, #141a2a 0%, transparent 60%),
                   linear-gradient(180deg, #0f172a, #0b1220);
    --text-main: #e6ebf0;
    --text-muted: #a0a7b4;
    --card-bg: #0f172a;
    --card-border: #1f2b3a;
    --primary: #8ab4f8;
    --primary-weak: #1f2b3a;
    --shadow: 0 10px 30px rgba(0,0,0,0.5);
}
:root.dark .link-icon { background: #1f2937; }
:root.dark .modal-backdrop { background: rgba(0,0,0,0.55); }

/* 平滑的主题切换过渡 */
body, .link-card, .tab-btn, .social-btn, .modal-content, .theme-switch .track, .theme-switch .thumb {
    transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}