/* ========================================================
   全局重置与基础样式
   ======================================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    background-image:
        radial-gradient(ellipse at 20% 10%, rgba(255, 107, 53, 0.12), transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(199, 62, 29, 0.10), transparent 55%),
        radial-gradient(ellipse at 50% 100%, rgba(255, 140, 66, 0.06), transparent 60%);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
    min-height: 100vh;
}

/* 背景画布（粒子） */
#particles-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

/* CRT 扫描线 */
.scanlines {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: repeating-linear-gradient(
        to bottom,
        transparent 0,
        transparent 2px,
        rgba(255, 255, 255, 0.012) 3px,
        transparent 4px
    );
    mix-blend-mode: overlay;
    opacity: 0.5;
}

/* 网格纹理 */
.grid-overlay {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 107, 53, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 107, 53, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 75%);
}

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover {
    color: var(--color-primary);
    text-shadow: var(--glow-text);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

ul {
    list-style: none;
}

::selection {
    background: rgba(255, 107, 53, 0.3);
    color: var(--color-text);
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--color-primary-dark), var(--color-primary));
    border-radius: 10px;
    border: 2px solid var(--color-bg);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-light);
    box-shadow: var(--glow-soft);
}

/* 主要内容容器 */
.section {
    position: relative;
    z-index: 2;
    padding: var(--space-2xl) var(--space-lg);
    max-width: var(--container-max);
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-primary-light);
    letter-spacing: 0.2em;
    margin-bottom: var(--space-sm);
    text-shadow: var(--glow-text);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    letter-spacing: 0.04em;
}

.section-subtitle {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    letter-spacing: 0.03em;
    margin-bottom: var(--space-md);
}

.section-line {
    width: 80px;
    height: 2px;
    margin: var(--space-sm) auto 0;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    box-shadow: var(--glow-soft);
}

.gradient-text {
    background: linear-gradient(135deg, #FF8C42 0%, #FF6B35 40%, #C73E1D 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    filter: drop-shadow(0 0 18px rgba(255, 107, 53, 0.35));
}

/* ========================================================
   导航栏
   ======================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: var(--z-nav);
    display: flex;
    align-items: center;
    transition: background-color var(--transition),
                backdrop-filter var(--transition),
                border-color var(--transition);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.75);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom-color: var(--color-border);
}

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

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-text);
    transition: text-shadow var(--transition), transform var(--transition);
}
.nav-logo:hover {
    text-shadow: 0 0 18px rgba(255, 107, 53, 0.6);
    transform: scale(1.02);
    color: var(--color-primary-light);
}
.logo-text {
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 8px rgba(255, 107, 53, 0.4));
}

.nav-menu {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

.nav-link {
    position: relative;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    padding: var(--space-xs) 0;
    transition: color var(--transition-fast);
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary));
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition);
    box-shadow: var(--glow-soft);
}
.nav-link:hover,
.nav-link.active {
    color: var(--color-text);
}
.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 22px;
    padding: 0;
}
.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}
.hamburger.active span:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
    background: var(--color-primary-light);
    box-shadow: var(--glow-soft);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
    background: var(--color-primary-light);
    box-shadow: var(--glow-soft);
}

/* ========================================================
   Hero 首屏
   ======================================================== */
.hero {
    position: relative;
    z-index: 2;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--nav-height) var(--space-lg) var(--space-xl);
    text-align: center;
    overflow: hidden;
}

.hero-float-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.45;
    pointer-events: none;
    z-index: 0;
}

.orb-1 {
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.55), transparent 70%);
    top: 10%;
    left: 8%;
    animation: floatOrb1 14s ease-in-out infinite;
}

.orb-2 {
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(199, 62, 29, 0.5), transparent 70%);
    bottom: 8%;
    right: 6%;
    animation: floatOrb2 18s ease-in-out infinite;
}

.orb-3 {
    width: 260px;
    height: 260px;
    background: radial-gradient(circle, rgba(255, 140, 66, 0.45), transparent 70%);
    top: 40%;
    right: 20%;
    animation: floatOrb1 22s ease-in-out infinite reverse;
}

.hero-content {
    position: relative;
    z-index: 3;
    max-width: 860px;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--color-primary-light);
    letter-spacing: 0.2em;
    margin-bottom: var(--space-md);
    text-shadow: var(--glow-text);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 6.5rem);
    font-weight: 800;
    line-height: 1;
    letter-spacing: 0.03em;
    margin-bottom: var(--space-md);
}

.hero-subtitle-text {
    font-family: var(--font-heading);
    font-size: clamp(1.05rem, 2.4vw, 1.55rem);
    font-weight: 500;
    color: var(--color-text-secondary);
    letter-spacing: 0.12em;
    margin-bottom: var(--space-lg);
}

.hero-description {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    max-width: 680px;
    margin: 0 auto var(--space-xl);
    line-height: 1.9;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* 按钮 */
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.95rem 1.8rem;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    overflow: hidden;
    min-height: 48px;
}
.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s;
}
.btn:hover::before {
    transform: translateX(100%);
}

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-color: var(--color-primary);
    box-shadow: var(--glow-primary);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 24px rgba(255, 107, 53, 0.6), 0 0 60px rgba(255, 107, 53, 0.3);
    color: #fff;
}

.btn-secondary {
    color: var(--color-text);
    background: transparent;
    border: 1px solid var(--color-border-hover);
    backdrop-filter: blur(8px);
}
.btn-secondary:hover {
    color: var(--color-primary-light);
    border-color: var(--color-primary);
    box-shadow: var(--glow-soft);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}
.btn-arrow {
    transition: transform var(--transition-fast);
}
.btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%);
    width: 26px;
    height: 42px;
    border: 2px solid var(--color-border-hover);
    border-radius: 20px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
    transition: border-color var(--transition);
    z-index: 3;
}
.scroll-indicator:hover {
    border-color: var(--color-primary-light);
}
.scroll-indicator span {
    display: block;
    width: 4px;
    height: 8px;
    border-radius: 2px;
    background: var(--color-primary-light);
    box-shadow: var(--glow-text);
    animation: scrollDot 1.8s ease-in-out infinite;
}

/* ========================================================
   About 关于
   ======================================================== */
.about-intro {
    display: grid;
    grid-template-columns: minmax(220px, 320px) 1fr;
    gap: var(--space-xl);
    align-items: center;
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    margin-bottom: var(--space-xl);
}

.about-avatar-frame {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--space-sm);
}

.avatar-circle {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    box-shadow: var(--glow-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    animation: pulseGlow 3.5s ease-in-out infinite;
}

.avatar-circle::before {
    content: '';
    position: absolute;
    inset: -10px;
    border-radius: 50%;
    border: 2px dashed rgba(255, 107, 53, 0.35);
    animation: spin 20s linear infinite;
}

.avatar-initial {
    font-family: var(--font-display);
    font-size: 5.5rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: 0.02em;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}

.about-heading-intro {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    margin-bottom: var(--space-md);
    letter-spacing: 0.03em;
}

.about-intro-text {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.95;
    margin-bottom: var(--space-sm);
}

/* 数据统计 */
.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    margin-bottom: var(--space-xl);
}

.stat-item {
    text-align: center;
    padding: var(--space-sm);
    position: relative;
    transition: transform var(--transition);
}
.stat-item:hover {
    transform: translateY(-4px);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.4rem;
    font-weight: 700;
    line-height: 1;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
    text-shadow: 0 0 20px rgba(255, 107, 53, 0.2);
}

.stat-plus {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-primary-light);
    margin-left: 2px;
    vertical-align: top;
    text-shadow: var(--glow-text);
}

.stat-label {
    font-family: var(--font-heading);
    font-size: 0.88rem;
    color: var(--color-text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-top: var(--space-xs);
}

/* 核心能力 */
.abilities {
    text-align: center;
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.abilities-title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.abilities-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
}

.ability-item {
    position: relative;
    padding: 0.65rem 1.4rem;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--color-text);
    background: rgba(255, 107, 53, 0.06);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    cursor: default;
}
.ability-item::before {
    content: '// ';
    color: var(--color-primary-light);
    font-family: var(--font-mono);
    font-size: 0.85em;
    opacity: 0.7;
}
.ability-item:hover {
    color: #fff;
    border-color: var(--color-primary);
    background: rgba(255, 107, 53, 0.14);
    transform: translateY(-3px) scale(1.04);
    box-shadow: 0 8px 24px -8px rgba(255, 107, 53, 0.4), 0 0 12px -4px rgba(255, 107, 53, 0.4);
}

/* ========================================================
   Projects 项目
   ======================================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.project-card {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    backdrop-filter: blur(10px);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}
.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.5s ease;
    z-index: 2;
}
.project-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-border-hover);
    box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.6), 0 0 30px -10px rgba(255, 107, 53, 0.4);
}
.project-card:hover::before {
    transform: scaleX(1);
}

.project-cover {
    aspect-ratio: 16 / 10;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-slow);
}

.project-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 35%, rgba(10, 10, 15, 0.8) 100%),
                repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.025) 0, rgba(255, 255, 255, 0.025) 2px, transparent 2px, transparent 8px);
}

.cover-icon {
    position: relative;
    z-index: 1;
    font-size: 4.5rem;
    filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.5));
    transition: transform var(--transition);
}
.project-card:hover .cover-icon {
    transform: scale(1.1) rotate(-3deg);
}

.cover-chat { background: linear-gradient(135deg, #1a0f1f 0%, #3a1f2e 50%, #C73E1D 100%); }
.cover-vision { background: linear-gradient(135deg, #1a1408 0%, #3a2a10 50%, #FF6B35 100%); }
.cover-forecast { background: linear-gradient(135deg, #0f1a1a 0%, #1e3a3a 50%, #FF8C42 100%); }
.cover-reco { background: linear-gradient(135deg, #1a0f2e 0%, #2e1e4a 50%, #FF6B35 100%); }
.cover-doc { background: linear-gradient(135deg, #1a1a0f 0%, #3a3a1e 50%, #C73E1D 100%); }
.cover-voice { background: linear-gradient(135deg, #0f1a2e 0%, #1e2e4a 50%, #FF8C42 100%); }

.project-body {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
    letter-spacing: 0.03em;
}

.project-desc {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--space-md);
    line-height: 1.7;
    flex: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: var(--space-md);
}

.project-tags span {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-primary-light);
    padding: 0.25rem 0.6rem;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: rgba(255, 107, 53, 0.06);
}

.project-links {
    display: flex;
    gap: var(--space-md);
    padding-top: var(--space-sm);
    border-top: 1px dashed var(--color-border);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary-light);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    transition: all var(--transition-fast);
}
.project-link:hover {
    color: #fff;
    gap: 0.7rem;
}
.code-link {
    color: var(--color-text-muted);
}
.code-link:hover {
    color: var(--color-primary-light);
}

/* ========================================================
   Blog 博客
   ======================================================== */
.blog-list {
    display: grid;
    gap: var(--space-md);
}

.blog-card {
    position: relative;
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    transition: all var(--transition);
}
.blog-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10%;
    bottom: 10%;
    width: 3px;
    background: linear-gradient(180deg, var(--color-primary-light), var(--color-primary-dark));
    opacity: 0;
    border-radius: 0 3px 3px 0;
    transition: opacity var(--transition);
}
.blog-card:hover {
    transform: translateX(6px);
    border-color: var(--color-border-hover);
    box-shadow: var(--glow-soft);
}
.blog-card:hover::before {
    opacity: 1;
}

.blog-category {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-primary-light);
    background: rgba(255, 107, 53, 0.1);
    border: 1px solid var(--color-border);
    padding: 0.2rem 0.7rem;
    border-radius: 999px;
    margin-bottom: var(--space-sm);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.blog-title {
    font-family: var(--font-display);
    font-size: 1.35rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
    letter-spacing: 0.02em;
    transition: color var(--transition-fast);
}
.blog-card:hover .blog-title {
    color: var(--color-primary-light);
}

.blog-excerpt {
    color: var(--color-text-secondary);
    font-size: 0.98rem;
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.blog-footer {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}
.blog-dot {
    color: var(--color-text-muted);
}

.blog-link {
    display: inline-flex;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-primary-light);
    letter-spacing: 0.05em;
    transition: all var(--transition-fast);
    margin-left: auto;
}
.blog-link:hover {
    color: #fff;
    transform: translateX(3px);
}

.blog-more-wrap {
    text-align: center;
    margin-top: var(--space-xl);
}

/* ========================================================
   Contact 联系
   ======================================================== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: var(--space-xl);
    align-items: start;
}

.contact-info-block {
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.contact-heading {
    font-family: var(--font-display);
    font-size: 1.6rem;
    margin-bottom: var(--space-sm);
    letter-spacing: 0.03em;
}

.contact-text {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.9;
    margin-bottom: var(--space-lg);
}

.contact-socials {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-text-secondary);
    background: rgba(20, 20, 32, 0.4);
    backdrop-filter: blur(8px);
    transition: all var(--transition);
}
.social-link:hover {
    color: var(--color-primary-light);
    border-color: var(--color-primary);
    box-shadow: var(--glow-primary);
    transform: translateY(-3px);
}

.contact-direct {
    padding: var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: rgba(255, 107, 53, 0.04);
    transition: all var(--transition);
}
.contact-direct:hover {
    border-color: var(--color-primary);
    box-shadow: var(--glow-soft);
}

.contact-direct-title {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: var(--space-xs);
}

.contact-email {
    display: block;
    font-family: var(--font-mono);
    font-size: 1.05rem;
    color: var(--color-primary-light);
    font-weight: 500;
    transition: all var(--transition-fast);
    word-break: break-all;
}
.contact-email:hover {
    color: #fff;
    text-shadow: var(--glow-text);
}

/* 表单 */
.contact-form {
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.form-field {
    display: block;
    margin-bottom: var(--space-md);
}
.form-row .form-field {
    margin-bottom: 0;
}

.form-label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.4rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.form-field input,
.form-field textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--color-text);
    background: rgba(10, 10, 15, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    outline: none;
}
.form-field textarea {
    resize: vertical;
    min-height: 140px;
    line-height: 1.6;
}
.form-field input::placeholder,
.form-field textarea::placeholder {
    color: var(--color-text-muted);
}
.form-field input:focus,
.form-field textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.15), var(--glow-soft);
    background: rgba(10, 10, 15, 0.8);
}

.form-status {
    margin-top: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.88rem;
    color: var(--color-primary-light);
    min-height: 1.4em;
    text-align: center;
}
.form-status.success {
    color: #6ee7b7;
    text-shadow: 0 0 10px rgba(110, 231, 183, 0.4);
}
.form-status.error {
    color: #fca5a5;
    text-shadow: 0 0 10px rgba(252, 165, 165, 0.4);
}

/* ========================================================
   Footer 页脚
   ======================================================== */
.footer {
    position: relative;
    z-index: 2;
    padding: var(--space-xl) var(--space-lg) var(--space-lg);
    text-align: center;
    border-top: 1px solid var(--color-border);
    background: linear-gradient(180deg, transparent, rgba(255, 107, 53, 0.03));
    margin-top: var(--space-xl);
}

.footer-inner {
    max-width: var(--container-max);
    margin: 0 auto;
}

.footer-logo {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
}

.footer-slogan {
    font-family: var(--font-heading);
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-lg);
}

.footer-copy {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* 返回顶部 */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    font-size: 1.4rem;
    font-weight: 700;
    border: 1px solid var(--color-primary);
    box-shadow: var(--glow-primary);
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    transition: all var(--transition);
    z-index: var(--z-nav);
    display: flex;
    align-items: center;
    justify-content: center;
}
.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 0 24px rgba(255, 107, 53, 0.7), 0 0 60px rgba(255, 107, 53, 0.3);
}

/* 进入动画 - 默认隐藏 */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}