html {
    --page-bg-start: #a1c4fd;
    --page-bg-end: #c2e9fb;
    --page-text: #333333;
    --page-text-soft: #555555;
    --page-text-muted: #888888;
    --page-surface: rgba(255, 255, 255, 0.95);
    --page-surface-strong: rgba(255, 255, 255, 0.92);
    --page-surface-soft: rgba(255, 255, 255, 0.7);
    --page-border: rgba(79, 172, 254, 0.2);
    --page-border-strong: rgba(79, 172, 254, 0.3);
    --page-border-stronger: rgba(79, 172, 254, 0.5);
    --page-accent: #4facfe;
    --page-accent-2: #00f2fe;
    --page-accent-bg: rgba(79, 172, 254, 0.1);
    --page-accent-bg-strong: rgba(79, 172, 254, 0.2);
    --page-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --page-shadow-strong: 0 6px 25px rgba(0, 0, 0, 0.15);
    --page-shadow-soft: 0 4px 10px rgba(79, 172, 254, 0.2);
    --page-shadow-soft-strong: 0 4px 10px rgba(79, 172, 254, 0.15);
    --page-grad-start: #4facfe;
    --page-grad-end: #00f2fe;
    --page-strong-start: #4facfe;
    --page-strong-end: #00f2fe;
    --page-placeholder: #888888;
    --page-inverse: #ffffff;
    --nav-interactive-text: #4facfe;
    color-scheme: light;
    background: linear-gradient(135deg, var(--page-bg-start), var(--page-bg-end));
}

html[data-theme="dark"] {
    --page-bg-start: #07111f;
    --page-bg-end: #0b1220;
    --page-text: #e5eefb;
    --page-text-soft: #c7d2e5;
    --page-text-muted: #94a3b8;
    --page-surface: rgba(15, 23, 42, 0.92);
    --page-surface-strong: rgba(15, 23, 42, 0.96);
    --page-surface-soft: rgba(15, 23, 42, 0.7);
    --page-border: rgba(125, 211, 252, 0.18);
    --page-border-strong: rgba(125, 211, 252, 0.26);
    --page-border-stronger: rgba(125, 211, 252, 0.4);
    --page-accent: #38bdf8;
    --page-accent-2: #2563eb;
    --page-accent-bg: rgba(56, 189, 248, 0.14);
    --page-accent-bg-strong: rgba(56, 189, 248, 0.2);
    --page-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
    --page-shadow-strong: 0 16px 36px rgba(0, 0, 0, 0.45);
    --page-shadow-soft: 0 4px 10px rgba(56, 189, 248, 0.2);
    --page-shadow-soft-strong: 0 4px 10px rgba(56, 189, 248, 0.15);
    --page-grad-start: #7dd3fc;
    --page-grad-end: #38bdf8;
    --page-strong-start: #0ea5e9;
    --page-strong-end: #2563eb;
    --page-placeholder: #94a3b8;
    --nav-interactive-text: #ffffff;
    color-scheme: dark;
}

body {
    background: linear-gradient(135deg, var(--page-bg-start), var(--page-bg-end));
    color: var(--page-text);
}

#particles-js {
    opacity: 0.9;
}

html[data-theme="dark"] #particles-js {
    opacity: 0.55;
}

nav,
.submenu,
[class*="card"],
[class*="modal"],
[class*="item"],
.timeline-content,
.future-experience,
.qrcode-placeholder,
.skill-bar,
.skill-progress,
.form-control,
footer,
.back-to-top {
    background: var(--page-surface);
    border-color: var(--page-border);
    box-shadow: var(--page-shadow);
    color: var(--page-text);
}

nav:hover {
    box-shadow: var(--page-shadow-strong);
}

nav a,
.menu-toggle {
    color: var(--page-accent);
}

.submenu a {
    color: var(--page-text-soft);
}

.page-header p,
.page-title p,
.profile-info,
.contact-info,
.contact-details,
.info-section,
.info-item,
.info-details,
.info-tags,
.tag,
.design-philosophy,
.philosophy-content,
.contact-item,
.timeline-date,
.period,
.responsibilities,
.achievements,
.company-details,
.course-item,
.badge,
.wechat-id,
.form-status,
footer {
    color: var(--page-text-soft);
}

nav a:hover,
.submenu a:hover {
    background: var(--page-accent-bg);
    border-color: var(--page-border-strong);
    color: var(--nav-interactive-text);
}

nav a.active,
.submenu a.active {
    background: var(--page-accent-bg-strong);
    border-color: var(--page-border-strong);
    color: var(--nav-interactive-text);
}

.submenu a {
    color: var(--page-accent);
}

.submenu a:hover,
.submenu a.active {
    background: rgba(255, 255, 255, 0.98);
    border-color: var(--page-border-strong);
    color: var(--page-accent);
    box-shadow: none;
}

.submenu a i {
    color: inherit;
}

.submenu a[data-theme-option].active {
    background: rgba(79, 172, 254, 0.22);
    border-color: rgba(79, 172, 254, 0.58);
    color: #1686d9;
    font-weight: 700;
}

.profile-card > h2 {
    color: var(--page-accent);
}

.profile-card > h2 i {
    color: inherit;
}

.social-links a {
    color: var(--page-inverse);
}

.contact-icon,
.contact-icon i,
.dev-modal-icon,
.dev-modal-icon i {
    color: var(--page-inverse);
}

html[data-theme="dark"] .social-links a {
    background: linear-gradient(135deg, #1e3a8a, #1d4ed8);
    box-shadow: 0 8px 18px rgba(29, 78, 216, 0.35);
}

html[data-theme="dark"] .social-links a:hover {
    box-shadow: 0 10px 24px rgba(29, 78, 216, 0.5);
}

html[data-theme="dark"] .submenu a {
    color: #c7d2e5;
}

html[data-theme="dark"] .submenu a:hover,
html[data-theme="dark"] .submenu a.active {
    background: rgba(56, 189, 248, 0.14);
    color: #ffffff;
}

html[data-theme="dark"] .submenu a[data-theme-option].active {
    background: rgba(30, 64, 175, 0.92);
    border-color: rgba(125, 211, 252, 0.42);
    color: #ffffff;
}

html[data-theme="dark"] .wechat-modal {
    background: rgba(2, 6, 23, 0.72);
    backdrop-filter: blur(8px);
}

html:not([data-theme="dark"]) .wechat-modal {
    background: rgba(2, 6, 23, 0.24);
    backdrop-filter: blur(10px) saturate(125%);
    -webkit-backdrop-filter: blur(10px) saturate(125%);
}

html[data-theme="dark"] .wechat-modal-content {
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(125, 211, 252, 0.2);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.48);
    color: var(--page-text);
}

html:not([data-theme="dark"]) .wechat-modal-content {
    background: rgba(248, 250, 252, 0.86);
    border: 1px solid rgba(79, 172, 254, 0.16);
    box-shadow: 0 18px 40px rgba(79, 172, 254, 0.18);
    color: var(--page-text);
    backdrop-filter: blur(14px) saturate(120%);
    -webkit-backdrop-filter: blur(14px) saturate(120%);
}

html[data-theme="dark"] .wechat-modal h3 {
    color: var(--page-accent);
}

html:not([data-theme="dark"]) .wechat-modal h3 {
    color: var(--page-accent);
}

html[data-theme="dark"] .wechat-qrcode {
    background: rgba(15, 23, 42, 0.8);
    border-color: rgba(125, 211, 252, 0.18);
}

html:not([data-theme="dark"]) .wechat-qrcode {
    background: rgba(255, 255, 255, 0.72);
}

html[data-theme="dark"] .wechat-id {
    background: rgba(15, 23, 42, 0.88);
    color: var(--page-text-soft);
}

html:not([data-theme="dark"]) .wechat-id {
    background: rgba(240, 248, 255, 0.78);
    color: var(--page-text-soft);
}

html[data-theme="dark"] .close-wechat {
    color: var(--page-text-muted);
}

.logo,
.page-header h1,
.page-title h1 {
    background: linear-gradient(45deg, var(--page-grad-start), var(--page-grad-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.profile-img,
.contact-icon,
.dev-modal-icon,
.timeline-dot,
.company-logo {
    background: linear-gradient(135deg, var(--page-strong-start), var(--page-strong-end));
    color: var(--page-inverse);
    border-color: var(--page-border-stronger);
}

.contact-item,
.info-item,
.qrcode-item {
    background: rgba(79, 172, 254, 0.05);
    border: 1px solid rgba(79, 172, 254, 0.1);
    box-shadow: none;
}

.contact-item:hover,
.info-item:hover,
.qrcode-item:hover {
    background: rgba(79, 172, 254, 0.1);
    border-color: rgba(79, 172, 254, 0.3);
    box-shadow: 0 5px 15px rgba(79, 172, 254, 0.2);
}

html[data-theme="dark"] .contact-item,
html[data-theme="dark"] .info-item,
html[data-theme="dark"] .qrcode-item {
    background: rgba(15, 23, 42, 0.72);
    border-color: rgba(125, 211, 252, 0.18);
}

html[data-theme="dark"] .contact-item:hover,
html[data-theme="dark"] .info-item:hover,
html[data-theme="dark"] .qrcode-item:hover {
    background: rgba(15, 23, 42, 0.84);
    border-color: rgba(125, 211, 252, 0.3);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.25);
}

.contact-info-card h2,
.contact-form-card h2,
.admin-login h2 {
    color: var(--page-accent) !important;
}

.contact-info-card h2 i,
.contact-form-card h2 i,
.admin-login h2 i {
    color: var(--page-accent) !important;
    background: none !important;
    -webkit-text-fill-color: currentColor !important;
}

.dev-modal {
    display: flex !important;
    position: fixed;
    inset: 0;
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-color: rgba(2, 6, 23, 0.24);
    backdrop-filter: blur(10px) saturate(125%);
    -webkit-backdrop-filter: blur(10px) saturate(125%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.24s ease, visibility 0.24s ease;
    animation: none !important;
}

html:not([data-theme="dark"]) .dev-modal {
    background-color: rgba(2, 6, 23, 0.28);
}

html[data-theme="dark"] .dev-modal {
    background-color: rgba(2, 6, 23, 0.72);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.dev-modal.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.dev-modal-content {
    position: relative;
    top: auto;
    left: auto;
    transform: none;
    width: min(92vw, 460px);
    margin: auto;
    padding: 34px 30px 30px;
    border-radius: 18px;
    text-align: center;
    background: rgba(240, 243, 247, 0.84);
    border: 1px solid rgba(148, 163, 184, 0.2);
    box-shadow: 0 18px 40px rgba(79, 172, 254, 0.14);
    backdrop-filter: blur(14px) saturate(120%);
    -webkit-backdrop-filter: blur(14px) saturate(120%);
    opacity: 0;
    transform: translateY(12px) scale(0.96);
    transition: opacity 0.24s ease, transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: opacity, transform;
    animation: none !important;
}

html:not([data-theme="dark"]) .dev-modal-content {
    background: rgba(240, 243, 247, 0.84);
    border: 1px solid rgba(148, 163, 184, 0.2);
}

html[data-theme="dark"] .dev-modal-content {
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(125, 211, 252, 0.2);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.48);
}

.dev-modal.is-open .dev-modal-content {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.dev-modal-icon {
    width: 88px;
    height: 88px;
    margin: 0 auto 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.6rem;
    color: var(--page-inverse);
    background: linear-gradient(135deg, var(--page-accent), var(--page-accent-2));
    box-shadow: var(--page-shadow-soft);
}

.dev-modal h2 {
    color: var(--page-text);
}

.dev-modal p {
    color: var(--page-text-soft);
}

.dev-modal-button {
    background: linear-gradient(135deg, var(--page-accent), var(--page-accent-2));
    color: var(--page-inverse);
    border: none;
    padding: 14px 40px;
    border-radius: 999px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--page-shadow-soft);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.dev-modal-button:hover {
    transform: translateY(-4px);
    box-shadow: var(--page-shadow-soft-strong);
}

html[data-theme="dark"] .dev-modal-button {
    background: linear-gradient(135deg, #1e40af, #1d4ed8);
    box-shadow: 0 8px 18px rgba(29, 78, 216, 0.35);
}

.skill-bar,
.timeline-line {
    background: var(--page-border);
}

.skill-progress,
.copy-btn,
.submit-btn,
.admin-button,
.back-to-top {
    background: linear-gradient(135deg, var(--page-accent), var(--page-accent-2));
    color: var(--page-inverse);
    border-color: transparent;
}

.copy-mini {
    margin-top: 8px;
    border: none;
    border-radius: 18px;
    padding: 7px 14px;
    background: linear-gradient(135deg, var(--page-accent), var(--page-accent-2));
    color: var(--page-inverse);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--page-shadow-soft);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.copy-mini:hover {
    transform: translateY(-2px);
    box-shadow: var(--page-shadow-soft-strong);
    color: var(--page-inverse);
}

html:not([data-theme="dark"]) .contact-item,
html:not([data-theme="dark"]) .contact-item:hover,
html:not([data-theme="dark"]) .info-item,
html:not([data-theme="dark"]) .info-item:hover,
html:not([data-theme="dark"]) .qrcode-item,
html:not([data-theme="dark"]) .qrcode-item:hover {
    box-shadow: none;
}

.resume-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border: none;
    padding: 14px 40px;
    border-radius: 30px;
    background: linear-gradient(135deg, var(--page-accent), var(--page-accent-2));
    color: var(--page-inverse);
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
    box-shadow: var(--page-shadow-soft);
}

.resume-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--page-shadow-soft-strong);
}

html[data-theme="dark"] .resume-download-btn {
    background: linear-gradient(135deg, #1e40af, #1d4ed8);
    box-shadow: 0 8px 18px rgba(29, 78, 216, 0.35);
}

.form-control::placeholder,
.qrcode-placeholder p {
    color: var(--page-placeholder) !important;
}

.form-control:focus {
    border-color: #38bdf8;
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.muted-tip {
    color: var(--page-placeholder);
}

.admin-login,
.messages-toolbar,
.message-card {
    background: var(--page-surface);
    border-color: var(--page-border);
    box-shadow: var(--page-shadow);
    color: var(--page-text);
}

.admin-login h2,
.message-sender,
.message-subject,
.message-content {
    color: var(--page-text);
}

.admin-login h2 {
    color: var(--page-accent);
}

.admin-login h2 i {
    color: var(--page-accent) !important;
    background: none !important;
    -webkit-text-fill-color: currentColor !important;
}

.messages-info,
.message-email,
.message-time,
.message-date,
.message-header,
.form-group label,
.no-messages,
footer {
    color: var(--page-text-soft);
}

.message-card {
    border-left-color: var(--page-accent);
}

.message-card:hover {
    box-shadow: var(--page-shadow-strong);
}

.email-link,
.login-btn,
.btn {
    background: linear-gradient(135deg, var(--page-accent), var(--page-accent-2));
    color: var(--page-inverse);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    box-shadow: var(--page-shadow-soft);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.email-link:hover,
.login-btn:hover,
.btn:hover {
    transform: translateY(-5px);
    box-shadow: var(--page-shadow-soft-strong);
}

.theme-switcher {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px;
    border-radius: 999px;
    background: var(--page-surface);
    border: 1px solid var(--page-border);
    box-shadow: var(--page-shadow);
    white-space: nowrap;
}

.theme-switcher button {
    appearance: none;
    border: 1px solid transparent;
    background: transparent;
    color: var(--page-accent);
    border-radius: 999px;
    padding: 8px 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font: inherit;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.theme-switcher button:hover {
    background: var(--page-accent-bg);
    transform: translateY(-1px);
}

.theme-switcher button.active {
    background: linear-gradient(135deg, var(--page-strong-start), var(--page-strong-end));
    color: var(--page-inverse);
    border-color: transparent;
    box-shadow: var(--page-shadow-soft);
}

.theme-switcher button i {
    font-size: 0.95em;
}

.brand-group {
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 0;
}

@media (max-width: 768px) {
    html[data-theme="dark"] nav {
        background: rgba(15, 23, 42, 0.82);
        backdrop-filter: blur(14px);
    }

    html:not([data-theme="dark"]) nav {
        background: rgba(255, 255, 255, 0.72);
        backdrop-filter: blur(16px) saturate(130%);
        -webkit-backdrop-filter: blur(16px) saturate(130%);
    }

    html[data-theme="dark"] .submenu {
        background: rgba(15, 23, 42, 0.76);
    }

    .theme-switcher {
        gap: 4px;
        padding: 4px;
    }

    .theme-switcher button {
        padding: 7px 9px;
    }

    .theme-switcher .theme-label {
        display: none;
    }

    html[data-theme="dark"] .submenu a {
        background: rgba(15, 23, 42, 0.72);
    }

    html[data-theme="dark"] .submenu a:hover,
    html[data-theme="dark"] .submenu a.active {
        background: rgba(56, 189, 248, 0.16);
    }
}