/* ============================================
   何建丰个人主页 - 样式表
   ============================================ */

/* --- CSS 变量 --- */
:root {
    --color-bg: #0a0a0a;
    --color-bg-alt: #111111;
    --color-bg-card: #1a1a1a;
    --color-text: #f0f0f0;
    --color-text-secondary: #999999;
    --color-text-muted: #666666;
    --color-accent: #00d4aa;
    --color-accent-dark: #00a888;
    --color-accent-glow: rgba(0, 212, 170, 0.15);
    --color-border: #222222;
    --color-white: #ffffff;

    --font-cn: 'Noto Sans SC', sans-serif;
    --font-en: 'Inter', sans-serif;

    --max-width: 1100px;
    --nav-height: 72px;
    --section-padding: 100px;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(0, 212, 170, 0.1);

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-cn);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* --- 滚动条美化 --- */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: #333;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-en);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    position: relative;
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition);
    border-radius: 1px;
}

.nav-link:hover {
    color: var(--color-text);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link-cta {
    background: var(--color-accent);
    color: var(--color-bg) !important;
    padding: 8px 20px;
    border-radius: 100px;
    font-weight: 500;
    font-size: 0.85rem;
}

.nav-link-cta::after {
    display: none;
}

.nav-link-cta:hover {
    background: var(--color-accent-dark);
    color: var(--color-bg) !important;
    transform: translateY(-1px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Hero 区域
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: var(--nav-height) 24px 0;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 20% 50%, rgba(0, 212, 170, 0.06) 0%, transparent 70%),
        radial-gradient(ellipse 50% 40% at 80% 20%, rgba(0, 150, 255, 0.04) 0%, transparent 70%),
        radial-gradient(ellipse 40% 30% at 50% 80%, rgba(0, 212, 170, 0.03) 0%, transparent 70%);
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 20px;
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--color-accent);
    letter-spacing: 2px;
    margin-bottom: 24px;
    background: rgba(0, 212, 170, 0.05);
}

.hero-title {
    margin-bottom: 20px;
}

.hero-name {
    font-size: clamp(2.8rem, 7vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--color-text-secondary);
    margin-bottom: 40px;
    font-weight: 300;
    letter-spacing: 1px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 100px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: var(--font-cn);
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-bg);
}

.btn-primary:hover {
    background: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 212, 170, 0.3);
}

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

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    font-family: var(--font-en);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
}

.stat-suffix {
    font-family: var(--font-en);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-accent);
    opacity: 0.7;
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 6px;
    letter-spacing: 1px;
}

.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    letter-spacing: 1px;
    animation: float 2s ease-in-out infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 1.5px solid var(--color-text-muted);
    border-bottom: 1.5px solid var(--color-text-muted);
    transform: rotate(45deg);
}

@keyframes float {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================
   通用 Section
   ============================================ */
.section {
    padding: var(--section-padding) 0;
}

.section:nth-child(even) {
    background: var(--color-bg-alt);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-en);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 16px;
}

.section-line {
    width: 40px;
    height: 3px;
    background: var(--color-accent);
    margin: 0 auto;
    border-radius: 2px;
}

/* ============================================
   关于我
   ============================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 60px;
    align-items: center;
}

.about-image .image-placeholder {
    aspect-ratio: 3 / 4;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.placeholder-icon {
    font-size: 3rem;
    opacity: 0.5;
}

.about-text h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-white);
}

.about-lead {
    font-size: 1.15rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: 16px;
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.tag {
    padding: 6px 16px;
    background: var(--color-accent-glow);
    border: 1px solid rgba(0, 212, 170, 0.15);
    border-radius: 100px;
    font-size: 0.82rem;
    color: var(--color-accent);
}

/* ============================================
   经历 - 时间线
   ============================================ */
.timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, transparent, var(--color-accent) 20%, var(--color-accent) 80%, transparent);
}

.timeline-item {
    position: relative;
    padding-bottom: 40px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -46px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 3px solid var(--color-bg);
    box-shadow: 0 0 0 2px var(--color-accent);
    z-index: 1;
}

.timeline-year {
    display: inline-block;
    font-family: var(--font-en);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: 1px;
    margin-bottom: 8px;
    padding: 2px 10px;
    background: var(--color-accent-glow);
    border-radius: 4px;
}

.timeline-content h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ============================================
   能力卡片
   ============================================ */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.skill-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 36px;
    transition: var(--transition);
}

.skill-card:hover {
    border-color: rgba(0, 212, 170, 0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.skill-icon {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.skill-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 10px;
}

.skill-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tags span {
    font-size: 0.75rem;
    padding: 3px 10px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 100px;
    color: var(--color-text-muted);
}

/* ============================================
   相册
   ============================================ */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.gallery-item-large {
    grid-column: span 2;
    grid-row: span 2;
}

.gallery-placeholder {
    aspect-ratio: 1;
}

.gallery-item-large .gallery-placeholder {
    aspect-ratio: auto;
    height: 100%;
}

.gallery-placeholder .placeholder-icon {
    font-size: 2.5rem;
}

.gallery-placeholder span {
    font-size: 0.8rem;
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px 16px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    font-size: 0.82rem;
    color: var(--color-white);
    opacity: 0;
    transform: translateY(4px);
    transition: var(--transition);
}

.gallery-item:hover .gallery-caption {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   联系我
   ============================================ */
.contact {
    background: var(--color-bg) !important;
}

.contact-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto 48px;
}

.contact-cards {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    max-width: 600px;
    margin: 0 auto;
}

.contact-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px 36px;
    text-align: center;
    flex: 1;
    min-width: 160px;
    transition: var(--transition);
}

.contact-card:hover {
    border-color: rgba(0, 212, 170, 0.3);
    transform: translateY(-2px);
}

.contact-card-icon {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.contact-card h3 {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-card p {
    font-size: 0.95rem;
    color: var(--color-white);
}

/* ============================================
   页脚
   ============================================ */
.footer {
    padding: 48px 0 32px;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 32px;
}

.footer-logo {
    font-family: var(--font-en);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-accent);
}

.footer-brand p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ============================================
   时间线图片样式
   ============================================ */
.timeline-images {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.timeline-thumb {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 2px solid var(--color-border);
    cursor: pointer;
    transition: var(--transition);
    background: var(--color-bg-card);
}

.timeline-thumb:hover {
    transform: scale(2.5);
    border-color: var(--color-accent);
    box-shadow: 0 8px 32px rgba(0, 212, 170, 0.4);
    z-index: 100;
    position: relative;
}

.timeline-link {
    display: inline-block;
    margin-top: 8px;
    margin-left: 16px;
    font-size: 0.9rem;
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
    vertical-align: middle;
}

.timeline-link:hover {
    color: var(--color-accent-dark);
    text-decoration: underline;
}

/* 时间线底部容器 - 图片和链接并排 */
.timeline-footer {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 12px;
    flex-wrap: wrap;
}

/* 图片灯箱/模态框 */
.image-lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

.image-lightbox.active {
    display: flex;
}

.image-lightbox img {
    max-width: 90%;
    max-height: 90vh;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.image-lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 2rem;
    color: var(--color-white);
    cursor: pointer;
    z-index: 2001;
}

/* ============================================
   详细内容区样式
   ============================================ */
.detail-section {
    background: var(--color-bg-alt);
    padding: 80px 0;
}

.detail-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.detail-period {
    color: var(--color-accent);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.detail-content h3 {
    font-size: 1.8rem;
    margin-bottom: 16px;
    color: var(--color-text);
}

.detail-content h4 {
    font-size: 1.3rem;
    margin-top: 32px;
    margin-bottom: 16px;
    color: var(--color-accent);
}

.detail-content ul,
.detail-content ol {
    padding-left: 20px;
    margin-bottom: 20px;
}

.detail-content li {
    padding: 8px 0;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.detail-content li strong {
    color: var(--color-text);
}

.detail-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin: 32px 0;
}

.detail-img {
    width: 100%;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid var(--color-border);
}

.detail-img:hover {
    transform: scale(1.02);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

/* ============================================
   能力板块新样式
   ============================================ */
.skill-list {
    list-style: none;
    padding: 0;
    margin: 12px 0;
    text-align: left;
}

.skill-list li {
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
}

.skill-list li:last-child {
    border-bottom: none;
}

.skill-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

.skill-list li strong {
    color: var(--color-text);
}

.skill-images {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.skill-thumb {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 2px solid var(--color-border);
    cursor: pointer;
    transition: var(--transition);
    background: var(--color-bg-card);
}

.skill-thumb:hover {
    transform: scale(2.5);
    border-color: var(--color-accent);
    box-shadow: 0 4px 16px rgba(0, 212, 170, 0.3);
    z-index: 100;
    position: relative;
}

.skill-achievement {
    font-size: 0.9rem;
    color: var(--color-accent);
    margin-top: 8px;
    font-weight: 500;
}

/* ============================================
   滚动动画
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   响应式 - 平板 (< 900px)
   ============================================ */
@media (max-width: 900px) {
    :root {
        --section-padding: 72px;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(15, 15, 15, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: flex-start;
        padding: 100px 32px 32px;
        gap: 20px;
        transition: var(--transition);
        border-left: 1px solid var(--color-border);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .about-image .image-placeholder {
        max-width: 300px;
        margin: 0 auto;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .philosophy-grid {
        grid-template-columns: 1fr;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .proof-grid {
        grid-template-columns: 1fr;
    }

    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .gallery-item-large {
        grid-column: span 2;
        grid-row: span 1;
    }

    .hero-stats {
        gap: 32px;
    }

    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
}

/* ============================================
   响应式 - 手机 (< 600px)
   ============================================ */
@media (max-width: 600px) {
    :root {
        --section-padding: 56px;
    }

    .hero-badge {
        font-size: 0.72rem;
        letter-spacing: 1px;
        padding: 5px 14px;
        white-space: normal;
        text-align: center;
        max-width: 90%;
    }

    .hero-name {
        font-size: 2.4rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 260px;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .stat-suffix {
        font-size: 1.1rem;
    }

    .cert-grid {
        grid-template-columns: 1fr;
    }

    .about-text h3 {
        font-size: 1.3rem;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .gallery-item-large {
        grid-column: span 1;
    }

    .gallery-placeholder {
        aspect-ratio: 4 / 3;
    }

    .contact-cards {
        flex-direction: column;
        align-items: center;
    }

    .contact-card {
        width: 100%;
        max-width: 320px;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .timeline {
        padding-left: 32px;
    }

    .timeline-dot {
        left: -38px;
        width: 10px;
        height: 10px;
    }

    .detail-content {
        padding: 24px 16px;
    }

    .philosophy-card,
    .service-card,
    .proof-card {
        padding: 24px 20px;
    }

    .proof-card .cert-grid {
        grid-template-columns: 1fr;
    }

    .timeline-content h3 {
        font-size: 1rem;
    }

    .footer-links {
        display: none;
    }
}

/* 手机端禁用图片hover放大（触摸设备无hover状态，避免点击卡住） */
@media (hover: none) and (pointer: coarse) {
    .timeline-thumb:hover,
    .skill-thumb:hover {
        transform: none;
        box-shadow: none;
    }

    .timeline-thumb,
    .skill-thumb {
        width: 70px;
        height: 70px;
    }
}

/* --- 图片占位符通用 --- */
.image-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--color-bg-card);
    border: 1px dashed var(--color-border);
    color: var(--color-text-muted);
    transition: var(--transition);
}

.image-placeholder:hover {
    border-color: var(--color-accent);
}

/* ============================================
   核心理念
   ============================================ */
.philosophy {
    background: var(--color-bg-alt);
}

.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.philosophy-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 36px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.philosophy-card:hover {
    border-color: rgba(0, 212, 170, 0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.philosophy-number {
    font-family: var(--font-en);
    font-size: 3rem;
    font-weight: 900;
    color: rgba(0, 212, 170, 0.08);
    position: absolute;
    top: 16px;
    right: 24px;
    line-height: 1;
}

.philosophy-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 12px;
}

.philosophy-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.75;
}

/* ============================================
   服务板块
   ============================================ */
.section-desc {
    text-align: center;
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.7;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.service-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: var(--transition);
    position: relative;
}

.service-card:hover {
    border-color: rgba(0, 212, 170, 0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.service-icon-wrap {
    margin-bottom: 12px;
}

.service-icon {
    font-size: 2rem;
}

.service-tag-label {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: 1px;
    padding: 3px 10px;
    background: var(--color-accent-glow);
    border: 1px solid rgba(0, 212, 170, 0.15);
    border-radius: 100px;
    margin-bottom: 16px;
}

.service-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 10px;
}

.service-card > p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.service-list {
    list-style: none;
    padding: 0;
    margin: 0 0 20px 0;
}

.service-list li {
    padding: 8px 0 8px 20px;
    position: relative;
    font-size: 0.88rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.service-list li:last-child {
    border-bottom: none;
}

.service-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

.service-delivery {
    padding-top: 12px;
    border-top: 1px solid var(--color-border);
}

.service-mode {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    letter-spacing: 0.5px;
}

.services-cta {
    text-align: center;
    padding: 48px 0;
    border-top: 1px solid var(--color-border);
}

.services-cta p {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    max-width: 460px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   实力证明
   ============================================ */
.proof-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.proof-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 36px;
    transition: var(--transition);
}

.proof-card:hover {
    border-color: rgba(0, 212, 170, 0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.proof-icon {
    font-size: 2.2rem;
    margin-bottom: 12px;
}

.proof-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 6px;
}

.proof-highlight {
    font-size: 0.88rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: 20px;
}

.proof-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.proof-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.proof-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.proof-item strong {
    font-size: 0.92rem;
    color: var(--color-white);
}

.proof-item span {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.proof-bullets {
    list-style: none;
    padding: 0;
    margin: 0 0 16px 0;
}

.proof-bullets li {
    padding: 8px 0;
    padding-left: 4px;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.proof-card > p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.ai-agent-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.agent-tag {
    font-size: 0.75rem;
    padding: 5px 12px;
    background: rgba(0, 212, 170, 0.08);
    border: 1px solid rgba(0, 212, 170, 0.15);
    border-radius: 100px;
    color: var(--color-accent);
    transition: var(--transition);
}

.agent-tag:hover {
    background: rgba(0, 212, 170, 0.15);
    border-color: rgba(0, 212, 170, 0.3);
}

/* ============================================
   我的作品
   ============================================ */
.works {
    background: var(--color-bg-alt);
}

.works-category {
    margin-bottom: 48px;
}

.works-category-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
}

.works-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.work-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
}

.work-item:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.work-item-content {
    flex: 1;
}

.work-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 8px;
}

.work-desc {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 10px;
}

.work-meta {
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.work-tag {
    font-size: 0.75rem;
    padding: 2px 10px;
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid rgba(0, 212, 170, 0.2);
    border-radius: 100px;
    color: var(--color-accent);
}

.work-link-icon {
    font-size: 1.2rem;
    color: var(--color-accent);
    margin-left: 16px;
    transition: transform 0.2s;
}

.work-item:hover .work-link-icon {
    transform: translateX(4px);
}

.work-video-note {
    font-size: 0.85rem;
    color: var(--color-accent);
    white-space: nowrap;
    margin-left: 16px;
}

.works-note {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-top: 16px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--color-accent);
}

/* ============================================
   领导力认证 - 照片+文字卡片
   ============================================ */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 16px 0;
}

.cert-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px 16px;
    transition: var(--transition);
}

.cert-card:hover {
    border-color: rgba(0, 212, 170, 0.4);
    background: rgba(0, 212, 170, 0.04);
    transform: translateY(-3px);
    box-shadow: 0 4px 20px rgba(0, 212, 170, 0.08);
}

.cert-photo {
    width: 100%;
    max-width: 180px;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 2px solid var(--color-border);
    margin-bottom: 14px;
    background: var(--color-bg-card);
    transition: var(--transition);
}

.cert-card:hover .cert-photo {
    border-color: var(--color-accent);
    box-shadow: 0 2px 12px rgba(0, 212, 170, 0.2);
}

.cert-text {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.cert-text strong {
    display: block;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-white);
    line-height: 1.4;
}

.cert-text .cert-sub {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}