/* ============================================
   style.css - 造物启示录 主样式表
   工程风格 + 灵动设计 + 响应式
   ============================================ */

/* === CSS 变量 === */
:root {
    --color-bg: #f7f8fa;
    --color-surface: #ffffff;
    --color-text: #2c3e50;
    --color-text-light: #5a6c7d;
    --color-text-lighter: #8b9aab;
    --color-primary: #1a1d23;
    --color-accent: #e8751a;
    --color-accent-hover: #c96014;
    --color-blue: #2980b9;
    --color-blue-light: #eaf4fb;
    --color-border: #e0e4e8;
    --color-border-light: #eef0f3;
    --color-shadow: rgba(26, 29, 35, 0.08);
    --color-shadow-hover: rgba(26, 29, 35, 0.16);
    --color-overlay: rgba(26, 29, 35, 0.6);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Share Tech Mono', 'SF Mono', 'Consolas', 'Courier New', monospace;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
    --header-height: 68px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* === 顶部导航 === */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border-light);
    transition: box-shadow var(--transition-smooth), background var(--transition-smooth);
}

.site-header.scrolled {
    box-shadow: 0 2px 20px var(--color-shadow);
    background: rgba(255, 255, 255, 0.96);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--color-primary);
    flex-shrink: 0;
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    display: flex;
    align-items: center;
    color: var(--color-accent);
}

.logo-text {
    letter-spacing: 0.5px;
}

/* 导航列表 */
.main-nav .nav-list {
    display: flex;
    gap: 4px;
    align-items: center;
}

.nav-link {
    display: block;
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-text-light);
    position: relative;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-primary);
    background: var(--color-border-light);
}

.nav-link.active {
    color: var(--color-accent);
    background: #fff6f0;
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--color-accent);
    border-radius: 3px;
}

/* 汉堡菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.menu-bar {
    display: block;
    width: 26px;
    height: 2.5px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.menu-toggle.active .menu-bar:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
}

.menu-toggle.active .menu-bar:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active .menu-bar:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
}

/* === 主内容区域 === */
main {
    flex: 1;
    margin-top: var(--header-height);
}

/* === 英雄区域 === */
.hero-section {
    position: relative;
    padding: 80px 0 100px;
    overflow: hidden;
    background: linear-gradient(160deg, #fafbfc 0%, #f0f2f5 40%, #fdf6f0 100%);
}

.hero-bg-pattern {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(232, 117, 26, 0.04) 0%, transparent 50%),
        radial-gradient(circle at 75% 60%, rgba(41, 128, 185, 0.04) 0%, transparent 50%),
        linear-gradient(rgba(0, 0, 0, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.015) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
    pointer-events: none;
}

.hero-section .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-light);
    margin-bottom: 24px;
    box-shadow: 0 2px 8px var(--color-shadow);
    animation: fadeInUp 0.6s ease-out;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(232, 117, 26, 0.5);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(232, 117, 26, 0);
    }
}

.hero-title {
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    font-weight: 900;
    line-height: 1.15;
    color: var(--color-primary);
    margin-bottom: 20px;
    letter-spacing: -0.5px;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero-title .highlight {
    color: var(--color-accent);
    position: relative;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-lighter);
    margin-top: 4px;
}

/* 英雄视觉区域 */
.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 380px;
}

.hero-gear {
    position: absolute;
    color: var(--color-accent);
    opacity: 0.3;
}

.hero-gear.gear-1 {
    top: 0;
    right: 10%;
    animation: rotate-gear 20s linear infinite;
}

.hero-gear.gear-2 {
    bottom: 10%;
    left: 5%;
    animation: rotate-gear 15s linear infinite reverse;
}

@keyframes rotate-gear {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.hero-3d-preview {
    perspective: 800px;
    width: 200px;
    height: 200px;
}

.preview-cube {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    animation: cube-float 6s ease-in-out infinite;
}

@keyframes cube-float {
    0%,
    100% {
        transform: rotateX(-25deg) rotateY(35deg) translateY(0);
    }
    30% {
        transform: rotateX(-20deg) rotateY(50deg) translateY(-15px);
    }
    60% {
        transform: rotateX(-30deg) rotateY(20deg) translateY(5px);
    }
}

.cube-face {
    position: absolute;
    width: 120px;
    height: 120px;
    left: 50%;
    top: 50%;
    margin-left: -60px;
    margin-top: -60px;
    border: 2.5px solid var(--color-accent);
    background: rgba(232, 117, 26, 0.06);
    border-radius: 4px;
    backface-visibility: visible;
}

.cube-face.front {
    transform: translateZ(60px);
}
.cube-face.back {
    transform: rotateY(180deg) translateZ(60px);
}
.cube-face.left {
    transform: rotateY(-90deg) translateZ(60px);
}
.cube-face.right {
    transform: rotateY(90deg) translateZ(60px);
}
.cube-face.top {
    transform: rotateX(90deg) translateZ(60px);
}
.cube-face.bottom {
    transform: rotateX(-90deg) translateZ(60px);
}

/* === 按钮 === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-smooth);
    border: 2px solid transparent;
    font-family: var(--font-body);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
    box-shadow: 0 4px 16px rgba(232, 117, 26, 0.3);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    box-shadow: 0 6px 24px rgba(232, 117, 26, 0.4);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-border);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-primary);
    border-color: var(--color-border);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px var(--color-shadow-hover);
}

.btn-lg {
    padding: 15px 36px;
    font-size: 1.05rem;
}

/* === 区块标题 === */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header.light {
    color: #fff;
}

.section-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-accent);
    margin-bottom: 12px;
}

.label-line {
    display: block;
    width: 30px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 2px;
}

.label-line.invert {
    background: rgba(255, 255, 255, 0.6);
}

.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.4rem);
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.section-header.light .section-title {
    color: #fff;
}

.section-desc {
    color: var(--color-text-light);
    font-size: 1.05rem;
}

.section-header.light .section-desc {
    color: rgba(255, 255, 255, 0.8);
}

.section-cta {
    text-align: center;
    margin-top: 40px;
}

/* === 作品卡片 === */
.featured-works {
    padding: 80px 0;
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.work-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
    box-shadow: 0 2px 12px var(--color-shadow);
    transition: all var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.work-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px var(--color-shadow-hover);
    border-color: var(--color-border);
}

.work-card-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 10;
    background: linear-gradient(135deg, #2c3e50 0%, #1a1d23 100%);
}

.work-img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-smooth);
}

.work-card:hover .work-img-placeholder {
    transform: scale(1.04);
}

.work-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    backdrop-filter: blur(4px);
}

.work-card-body {
    padding: 20px 22px 22px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.work-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-primary);
}

.work-excerpt {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 14px;
    flex: 1;
}

.work-meta {
    display: flex;
    gap: 16px;
    font-size: 0.82rem;
    color: var(--color-text-lighter);
    margin-bottom: 14px;
    font-family: var(--font-mono);
}

.work-link {
    display: inline-block;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-accent);
    transition: all var(--transition-fast);
}

.work-link:hover {
    color: var(--color-accent-hover);
    transform: translateX(4px);
}

/* === 拼装流程预览 === */
.assembly-preview {
    padding: 80px 0;
    background: var(--color-primary);
    color: #fff;
}

.steps-row {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    justify-content: center;
    flex-wrap: wrap;
}

.step-card {
    flex: 1;
    min-width: 220px;
    max-width: 300px;
    text-align: center;
    padding: 32px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-smooth);
    position: relative;
}

.step-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.25);
}

.step-number {
    font-family: var(--font-mono);
    font-size: 3rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.15);
    position: absolute;
    top: 16px;
    right: 20px;
    line-height: 1;
    pointer-events: none;
}

.step-icon {
    margin-bottom: 16px;
    color: var(--color-accent);
    display: flex;
    justify-content: center;
}

.step-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.step-card p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.step-arrow {
    font-size: 1.8rem;
    color: rgba(255, 255, 255, 0.3);
    align-self: center;
    flex-shrink: 0;
    font-weight: 300;
}

/* === CTA区域 === */
.cta-section {
    padding: 60px 0 80px;
}

.cta-card {
    background: linear-gradient(135deg, #fdf6f0 0%, #fef9f4 100%);
    border: 2px solid #fce4d0;
    border-radius: var(--radius-xl);
    padding: 56px 40px;
    text-align: center;
}

.cta-card h2 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--color-primary);
}

.cta-card p {
    color: var(--color-text-light);
    margin-bottom: 24px;
    font-size: 1.05rem;
}

/* === 页脚 === */
.site-footer {
    background: var(--color-primary);
    color: rgba(255, 255, 255, 0.85);
    padding: 56px 0 0;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.15rem;
    color: #fff;
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

.footer-nav h4,
.footer-contact h4 {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 14px;
    letter-spacing: 0.5px;
}

.footer-nav ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

.footer-contact p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 6px;
}

.footer-qr-placeholder {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
}

.footer-qr-placeholder span {
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0 24px;
    gap: 12px;
}

.footer-beian {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
}

.footer-beian a {
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition-fast);
}

.footer-beian a:hover {
    color: rgba(255, 255, 255, 0.8);
}

.beian-separator {
    color: rgba(255, 255, 255, 0.25);
}

.beian-gongan {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.footer-copy {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
}

/* === 回到顶部 === */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px var(--color-shadow);
    transition: all var(--transition-smooth);
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.back-to-top:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px var(--color-shadow-hover);
}

/* === 页面标题（子页面通用） === */
.page-hero {
    padding: 60px 0 50px;
    background: linear-gradient(160deg, #fafbfc 0%, #f0f2f5 100%);
    text-align: center;
    border-bottom: 1px solid var(--color-border-light);
}

.page-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 900;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.page-subtitle {
    color: var(--color-text-light);
    font-size: 1.05rem;
}

/* === 筛选栏 === */
.works-filter-section {
    padding: 40px 0 80px;
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 36px;
    padding: 16px 20px;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.filter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.filter-tab {
    padding: 8px 18px;
    border-radius: 50px;
    border: 1.5px solid var(--color-border-light);
    background: transparent;
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--color-text-light);
    transition: all var(--transition-fast);
    font-family: var(--font-body);
    white-space: nowrap;
}

.filter-tab:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.filter-tab.active {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

.filter-search {
    position: relative;
    flex-shrink: 0;
}

.search-input {
    padding: 9px 16px 9px 38px;
    border-radius: 50px;
    border: 1.5px solid var(--color-border-light);
    font-size: 0.9rem;
    font-family: var(--font-body);
    width: 220px;
    transition: all var(--transition-fast);
    background: var(--color-bg);
    color: var(--color-text);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(232, 117, 26, 0.08);
    width: 260px;
}

.search-icon {
    position: absolute;
    left: 13px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-lighter);
    pointer-events: none;
}

.works-grid-full {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.no-results {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-lighter);
}

.no-results svg {
    margin-bottom: 16px;
    color: var(--color-text-lighter);
}

/* === 详情页 === */
.detail-hero {
    padding: 40px 0 20px;
    background: var(--color-bg);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 20px;
    transition: color var(--transition-fast);
    font-weight: 500;
}

.back-link:hover {
    color: var(--color-accent);
}

.detail-header {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--color-border-light);
    box-shadow: 0 2px 12px var(--color-shadow);
}

.detail-header-image {
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, #2c3e50, #1a1d23);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.detail-header-info h1 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.detail-header-info .work-tag-inline {
    display: inline-block;
    background: #fff6f0;
    color: var(--color-accent);
    padding: 4px 14px;
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.detail-header-info .work-desc {
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

.detail-content {
    padding: 40px 0 80px;
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 36px;
}

.detail-section {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 24px;
    border: 1px solid var(--color-border-light);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.detail-section-title {
    font-size: 1.3rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.section-num {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    color: var(--color-accent);
    font-weight: 700;
}

.specs-table {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.specs-table .spec-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 14px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
}

.spec-row .spec-label {
    color: var(--color-text-lighter);
    font-weight: 500;
}

.spec-row .spec-value {
    font-weight: 600;
    font-family: var(--font-mono);
}

/* 拼装步骤 */
.assembly-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.assembly-step {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-accent);
    transition: all var(--transition-smooth);
    position: relative;
}

.assembly-step:hover {
    background: #fff6f0;
    transform: translateX(4px);
}

.assembly-step .step-indicator {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
    font-family: var(--font-mono);
}

.assembly-step .step-content h4 {
    font-weight: 700;
    margin-bottom: 4px;
    font-size: 1.05rem;
}

.assembly-step .step-content p {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* 侧边栏 */
.sidebar-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
    border: 1px solid var(--color-border-light);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.sidebar-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-accent);
    display: inline-block;
}

.sidebar-card .param-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px dashed var(--color-border-light);
    font-size: 0.88rem;
}

.param-row .param-label {
    color: var(--color-text-lighter);
}

.param-row .param-value {
    font-weight: 600;
    font-family: var(--font-mono);
}

.tool-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.tool-list li {
    padding: 8px 12px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tool-list li::before {
    content: '🔧';
    font-size: 0.8rem;
}

/* === 关于页 === */
.about-hero {
    background: linear-gradient(160deg, #fafbfc 0%, #fdf6f0 100%);
}

.about-content {
    padding: 60px 0 40px;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 48px;
    align-items: start;
}

.about-text-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 36px;
    border: 1px solid var(--color-border-light);
    box-shadow: 0 2px 12px var(--color-shadow);
}

.about-text-card h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    margin-top: 28px;
    color: var(--color-primary);
}

.about-text-card h2:first-child {
    margin-top: 0;
}

.about-text-card p {
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 14px;
    font-size: 0.95rem;
}

.about-visual {
    position: sticky;
    top: calc(var(--header-height) + 30px);
}

.about-visual-placeholder {
    background: linear-gradient(135deg, #2c3e50, #1a1d23);
    border-radius: var(--radius-lg);
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    min-height: 350px;
}

/* === 联系页 === */
.contact-hero {
    background: linear-gradient(160deg, #fafbfc 0%, #fdf6f0 100%);
}

.contact-content {
    padding: 50px 0 80px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 36px;
    border: 1px solid var(--color-border-light);
    box-shadow: 0 2px 12px var(--color-shadow);
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-method {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 16px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    transition: all var(--transition-smooth);
}

.contact-method:hover {
    background: #fff6f0;
}

.contact-icon {
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-method h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.contact-method p {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.contact-qr-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 36px;
    border: 1px solid var(--color-border-light);
    box-shadow: 0 2px 12px var(--color-shadow);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.contact-qr-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.qr-code-large {
    margin-bottom: 16px;
}

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

.qr-sub {
    font-size: 0.82rem !important;
    color: var(--color-text-lighter) !important;
    margin-top: 4px;
}

/* === 动画 === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* === 响应式设计 === */
@media (max-width: 1024px) {
    .hero-section .container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    .hero-visual {
        min-height: 280px;
        order: -1;
    }
    .hero-actions {
        justify-content: center;
    }
    .hero-stats {
        justify-content: center;
    }
    .works-grid,
    .works-grid-full {
        grid-template-columns: repeat(2, 1fr);
    }
    .detail-grid {
        grid-template-columns: 1fr;
    }
    .detail-header {
        grid-template-columns: 1fr;
    }
    .about-grid {
        grid-template-columns: 1fr;
    }
    .about-visual {
        position: static;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .steps-row {
        gap: 16px;
    }
    .step-arrow {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }
    .container {
        padding: 0 16px;
    }

    /* 移动端导航 */
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 320px;
        height: 100vh;
        background: var(--color-surface);
        box-shadow: -4px 0 30px rgba(0, 0, 0, 0.15);
        transition: right var(--transition-smooth);
        padding: 80px 28px 30px;
        z-index: 999;
    }
    .main-nav.open {
        right: 0;
    }
    .main-nav .nav-list {
        flex-direction: column;
        gap: 4px;
    }
    .nav-link {
        padding: 14px 18px;
        font-size: 1.05rem;
        border-radius: var(--radius-md);
    }
    .menu-toggle {
        display: flex;
    }

    .hero-section {
        padding: 40px 0 60px;
    }
    .hero-stats {
        gap: 20px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .stat-number {
        font-size: 1.5rem;
    }
    .works-grid,
    .works-grid-full {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .filter-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    .filter-tabs {
        justify-content: center;
    }
    .search-input {
        width: 100%;
    }
    .search-input:focus {
        width: 100%;
    }
    .steps-row {
        flex-direction: column;
        align-items: center;
    }
    .step-card {
        max-width: 100%;
        width: 100%;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .footer-beian {
        justify-content: center;
    }
    .cta-card {
        padding: 36px 20px;
    }
    .detail-section {
        padding: 20px;
    }
    .specs-table {
        grid-template-columns: 1fr;
    }
    .assembly-step {
        flex-direction: column;
        gap: 12px;
    }
    .back-to-top {
        bottom: 20px;
        right: 16px;
        width: 38px;
        height: 38px;
    }
    .about-text-card {
        padding: 24px;
    }
    .contact-info-card {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    .hero-subtitle {
        font-size: 0.95rem;
    }
    .btn {
        padding: 10px 20px;
        font-size: 0.88rem;
    }
    .section-title {
        font-size: 1.5rem;
    }
    .page-title {
        font-size: 1.6rem;
    }
    .detail-header {
        padding: 20px;
    }
    .detail-header-info h1 {
        font-size: 1.4rem;
    }
    .hero-3d-preview {
        width: 140px;
        height: 140px;
    }
    .cube-face {
        width: 80px;
        height: 80px;
        margin-left: -40px;
        margin-top: -40px;
    }
    .cube-face.front {
        transform: translateZ(40px);
    }
    .cube-face.back {
        transform: rotateY(180deg) translateZ(40px);
    }
    .cube-face.left {
        transform: rotateY(-90deg) translateZ(40px);
    }
    .cube-face.right {
        transform: rotateY(90deg) translateZ(40px);
    }
    .cube-face.top {
        transform: rotateX(90deg) translateZ(40px);
    }
    .cube-face.bottom {
        transform: rotateX(-90deg) translateZ(40px);
    }
}

/* 打印样式 */
@media print {
    .site-header,
    .back-to-top,
    .menu-toggle,
    .hero-bg-pattern,
    .hero-gear,
    .cta-section,
    .site-footer {
        display: none !important;
    }
    main {
        margin-top: 0;
    }
    body {
        background: #fff;
        color: #000;
    }
}