/* ============================
   全局变量与重置
   ============================ */
:root {
    --color-bg: #0a0e1a;
    --color-bg-2: #0f1428;
    --color-bg-3: #131a36;
    --color-surface: rgba(20, 30, 60, 0.6);
    --color-surface-hover: rgba(30, 45, 80, 0.8);
    --color-primary: #00d4ff;
    --color-primary-2: #0066ff;
    --color-accent: #00ffaa;
    --color-text: #e8ecf4;
    --color-text-muted: #8a96b8;
    --color-border: rgba(0, 212, 255, 0.15);
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #0066ff 100%);
    --gradient-text: linear-gradient(135deg, #00d4ff 0%, #00ffaa 100%);
    --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.15);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* 粒子画布 */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.6;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* ============================
   导航栏
   ============================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    padding: 20px 0;
}

.navbar.scrolled {
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: "SF Pro Display", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-weight: 700;
    font-size: 18px;
    color: var(--color-text);
    letter-spacing: 1px;
}

.logo-icon {
    display: flex;
    align-items: center;
}

.logo-img {
    width: 36px;
    height: 36px;
    object-fit: contain;
    border-radius: 6px;
}

.nav-menu {
    display: flex;
    gap: 36px;
    align-items: center;
}

.nav-link {
    font-size: 15px;
    font-weight: 400;
    color: var(--color-text-muted);
    position: relative;
    transition: var(--transition);
    padding: 4px 0;
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.nav-toggle span {
    width: 26px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
    border-radius: 2px;
}

.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 首屏
   ============================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 120px 24px 80px;
}

.hero-bg-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: 0;
}

.hero-bg-grid::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: radial-gradient(ellipse at center, rgba(0, 102, 255, 0.15) 0%, transparent 70%);
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50px;
    font-size: 14px;
    color: var(--color-primary);
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 255, 170, 0.4); }
    50% { opacity: 0.6; box-shadow: 0 0 0 8px rgba(0, 255, 170, 0); }
}

.hero-title {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: 2px;
}

.title-line {
    display: block;
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: clamp(14px, 2vw, 17px);
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: 40px;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(0, 212, 255, 0.5);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid rgba(0, 212, 255, 0.4);
}

.btn-outline:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* 滚动提示 */
.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--color-text-muted);
    font-size: 12px;
    z-index: 1;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 50%;
    background: var(--color-accent);
    animation: scrollDown 2s infinite;
}

@keyframes scrollDown {
    0% { top: -100%; }
    100% { top: 200%; }
}

/* ============================
   通用 Section
   ============================ */
.section {
    padding: 100px 0;
    position: relative;
}

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

.section-tag {
    display: inline-block;
    font-family: "SF Pro Display", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 13px;
    letter-spacing: 4px;
    color: var(--color-primary);
    margin-bottom: 16px;
    opacity: 0.8;
}

.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.section-line {
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 3px;
    margin: 0 auto 20px;
}

.section-desc {
    color: var(--color-text-muted);
    font-size: 15px;
    max-width: 600px;
    margin: 0 auto;
}

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

.about-text {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about-desc {
    color: var(--color-text-muted);
    font-size: 15px;
    line-height: 1.9;
    text-align: justify;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s;
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 212, 255, 0.4);
    box-shadow: var(--shadow-glow);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-number {
    font-family: "SF Pro Display", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 42px;
    font-weight: 900;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    display: inline-block;
}

.stat-suffix {
    display: inline-block;
    font-family: "SF Pro Display", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
    vertical-align: top;
    margin-left: 2px;
}

.stat-label {
    color: var(--color-text-muted);
    font-size: 14px;
    margin-top: 8px;
}

/* ============================
   核心服务
   ============================ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(0, 212, 255, 0.08), transparent 60%);
    opacity: 0;
    transition: opacity 0.4s;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 212, 255, 0.4);
    box-shadow: var(--shadow-glow), var(--shadow-card);
}

.service-card:hover::before {
    opacity: 1;
}

.service-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.08);
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: rgba(0, 212, 255, 0.15);
    transform: scale(1.05);
}

.service-title {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text);
}

.service-desc {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-features {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.service-features li {
    font-size: 13px;
    color: var(--color-text-muted);
    padding-left: 20px;
    position: relative;
}

.service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0.6;
}

/* ============================
   技术优势
   ============================ */
.advantages {
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-2) 50%, var(--color-bg) 100%);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.advantage-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.advantage-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    transition: width 0.5s;
}

.advantage-item:hover {
    transform: translateY(-6px);
    border-color: rgba(0, 212, 255, 0.3);
    background: var(--color-surface-hover);
}

.advantage-item:hover::after {
    width: 100%;
}

.adv-number {
    font-family: "SF Pro Display", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 48px;
    font-weight: 900;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 20px;
    opacity: 0.5;
    transition: opacity 0.4s;
}

.advantage-item:hover .adv-number {
    opacity: 1;
}

.adv-content h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text);
}

.adv-content p {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ============================
   应用领域
   ============================ */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.app-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    text-align: left;
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.05) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.4s;
}

.app-card:hover {
    transform: translateY(-6px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--shadow-glow);
}

.app-card:hover::before {
    opacity: 1;
}

.app-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.08);
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    color: var(--color-primary);
    transition: var(--transition);
}

.app-card:hover .app-icon {
    background: rgba(0, 212, 255, 0.15);
    color: var(--color-accent);
}

.app-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-text);
}

.app-card p {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ============================
   联系我们
   ============================ */
.contact {
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-2) 100%);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.contact-item:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateX(4px);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--color-primary);
    flex-shrink: 0;
}

.contact-detail h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--color-text);
}

.contact-detail p {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* 表单 */
.contact-form-wrapper {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    backdrop-filter: blur(10px);
}

.form-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 28px;
    color: var(--color-text);
}

.form-group {
    margin-bottom: 18px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: rgba(10, 14, 26, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
    opacity: 0.6;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-success {
    display: none;
    margin-top: 16px;
    padding: 12px 20px;
    background: rgba(0, 255, 170, 0.1);
    border: 1px solid rgba(0, 255, 170, 0.3);
    border-radius: var(--radius-sm);
    color: var(--color-accent);
    font-size: 14px;
    text-align: center;
}

.form-success.show {
    display: block;
    animation: fadeInUp 0.4s;
}

/* ============================
   页脚
   ============================ */
.footer {
    background: var(--color-bg-2);
    border-top: 1px solid var(--color-border);
    padding: 60px 0 24px;
    position: relative;
    z-index: 1;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: "SF Pro Display", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 20px;
}

.footer-logo-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    border-radius: 5px;
}

.footer-desc {
    color: var(--color-text-muted);
    font-size: 14px;
    line-height: 1.8;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col a {
    font-size: 14px;
    color: var(--color-text-muted);
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--color-primary);
    padding-left: 4px;
}

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

.footer-bottom p {
    font-size: 13px;
    color: var(--color-text-muted);
}

/* ============================
   滚动揭示动画
   ============================ */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================
   响应式
   ============================ */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(10, 14, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 30px;
        transition: right 0.4s;
        border-left: 1px solid var(--color-border);
    }

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

    .nav-toggle {
        display: flex;
    }

    .section {
        padding: 70px 0;
    }

    .hero {
        padding: 100px 24px 60px;
    }

    .hero-subtitle br {
        display: none;
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

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

    .about-stats {
        grid-template-columns: 1fr 1fr;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-links {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

    .contact-form-wrapper {
        padding: 28px 20px;
    }

    .stat-number {
        font-size: 34px;
    }
}

@media (max-width: 480px) {
    .about-stats {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ============================
   页脚后台入口
   ============================ */
.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.admin-link {
    font-size: 12px;
    color: var(--color-text-muted);
    opacity: 0.5;
    transition: var(--transition);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.admin-link:hover {
    color: var(--color-primary);
    opacity: 1;
}

/* ============================
   样片展示
   ============================ */
.showcase {
    background: linear-gradient(180deg, var(--color-bg-2) 0%, var(--color-bg) 100%);
}

.showcase-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 8px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    color: var(--color-text-muted);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.filter-btn:hover {
    border-color: rgba(0, 212, 255, 0.3);
    color: var(--color-text);
}

.filter-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.showcase-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.showcase-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--shadow-glow), var(--shadow-card);
}

.showcase-image {
    position: relative;
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: var(--color-bg-3);
}

.showcase-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.showcase-card:hover .showcase-image img {
    transform: scale(1.08);
}

.showcase-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.showcase-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 14px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 500;
    backdrop-filter: blur(10px);
    border: 1px solid;
}

.cat-bim {
    background: rgba(0, 212, 255, 0.15);
    color: #00d4ff;
    border-color: rgba(0, 212, 255, 0.3);
}

.cat-hall {
    background: rgba(0, 255, 170, 0.15);
    color: #00ffaa;
    border-color: rgba(0, 255, 170, 0.3);
}

.cat-animation {
    background: rgba(255, 157, 0, 0.15);
    color: #ff9d00;
    border-color: rgba(255, 157, 0, 0.3);
}

.cat-multimedia {
    background: rgba(189, 92, 255, 0.15);
    color: #bd5cff;
    border-color: rgba(189, 92, 255, 0.3);
}

.showcase-overlay {
    position: absolute;
    inset: 0;
    background: rgba(10, 14, 26, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.showcase-card:hover .showcase-overlay {
    opacity: 1;
}

.showcase-zoom {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.2);
    border: 1px solid rgba(0, 212, 255, 0.4);
    border-radius: 50%;
    color: #fff;
    transform: scale(0.8);
    transition: transform 0.3s;
}

.showcase-card:hover .showcase-zoom {
    transform: scale(1);
}

.showcase-info {
    padding: 20px 24px 24px;
}

.showcase-info h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}

.showcase-info p {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.showcase-empty {
    text-align: center;
    padding: 80px 20px;
    color: var(--color-text-muted);
}

.showcase-empty .empty-icon {
    margin-bottom: 20px;
    opacity: 0.5;
}

.showcase-empty p {
    font-size: 15px;
}

/* 响应式 - 样片展示 */
@media (max-width: 1024px) {
    .showcase-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .showcase-grid {
        grid-template-columns: 1fr;
    }

    .showcase-filters {
        gap: 8px;
    }

    .filter-btn {
        padding: 6px 16px;
        font-size: 13px;
    }
}

/* ============================
   后台管理页面
   ============================ */
.admin-body {
    background: var(--color-bg);
    overflow-x: hidden;
}

/* 登录界面 */
.admin-login {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    position: relative;
}

.admin-login::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.login-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    width: 100%;
    max-width: 420px;
    text-align: center;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-card);
    position: relative;
    z-index: 1;
}

.login-logo {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.login-logo-img {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: 8px;
}

.login-title {
    font-family: "SF Pro Display", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.login-subtitle {
    color: var(--color-text-muted);
    font-size: 14px;
    margin-bottom: 32px;
}

.login-form {
    text-align: left;
}

.login-error {
    display: none;
    margin-top: 12px;
    color: #ff4d6d;
    font-size: 13px;
    text-align: center;
}

.back-link {
    display: inline-block;
    margin-top: 24px;
    color: var(--color-text-muted);
    font-size: 13px;
    transition: var(--transition);
}

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

/* 管理面板 */
.admin-panel {
    min-height: 100vh;
}

.admin-header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    background: rgba(10, 14, 26, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.admin-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: "SF Pro Display", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-weight: 700;
    font-size: 16px;
}

.admin-logo-img {
    width: 28px;
    height: 28px;
    object-fit: contain;
    border-radius: 5px;
}

.admin-header-right {
    display: flex;
    gap: 12px;
    align-items: center;
}

.admin-btn-outline {
    padding: 8px 20px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.admin-btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.admin-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 32px 24px;
}

/* 统计栏 */
.admin-stats {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.admin-stat {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
    backdrop-filter: blur(10px);
}

.admin-stat .stat-value {
    display: block;
    font-family: "SF Pro Display", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 28px;
    font-weight: 900;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 6px;
}

.admin-stat .stat-label {
    font-size: 12px;
    color: var(--color-text-muted);
}

/* 操作栏 */
.admin-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.admin-section-title {
    font-size: 20px;
    font-weight: 700;
}

/* 样片列表 */
.admin-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.admin-item-card {
    display: flex;
    gap: 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 16px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.admin-item-card:hover {
    border-color: rgba(0, 212, 255, 0.2);
}

.admin-item-image {
    width: 140px;
    height: 90px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--color-bg-3);
    position: relative;
    flex-shrink: 0;
}

.admin-item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.admin-item-image .no-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.item-category-tag {
    position: absolute;
    bottom: 6px;
    left: 6px;
    padding: 2px 8px;
    border-radius: 50px;
    font-size: 11px;
    border: 1px solid;
}

.admin-item-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.admin-item-info h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
}

.admin-item-info p {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.item-link-tag {
    display: inline-block;
    margin-top: 6px;
    font-size: 11px;
    color: var(--color-primary);
    opacity: 0.7;
}

.admin-item-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    justify-content: center;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-text-muted);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    white-space: nowrap;
}

.edit-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.delete-btn:hover {
    border-color: #ff4d6d;
    color: #ff4d6d;
}

.admin-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-muted);
    font-size: 15px;
}

/* 弹窗 */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background: var(--color-bg-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95);
    transition: transform 0.3s;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 28px;
    border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
    font-size: 20px;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 28px;
    cursor: pointer;
    line-height: 1;
    padding: 0;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--color-text);
}

.modal-form {
    padding: 24px 28px;
}

.modal-form label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--color-text);
}

.modal-form .required {
    color: #ff4d6d;
}

.modal-form .form-group {
    margin-bottom: 20px;
}

.modal-form input[type="text"],
.modal-form input[type="password"],
.modal-form input[type="tel"],
.modal-form textarea,
.modal-form select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(10, 14, 26, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    resize: vertical;
}

.modal-form select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%238a96b8' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.modal-form select option {
    background: var(--color-bg-2);
}

.modal-form input:focus,
.modal-form textarea:focus,
.modal-form select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-hint {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 6px;
}

/* 图片上传 */
.image-upload-area {
    position: relative;
}

.image-preview {
    width: 100%;
    height: 180px;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    cursor: pointer;
    transition: var(--transition);
    overflow: hidden;
    background: rgba(10, 14, 26, 0.4);
}

.image-preview:hover {
    border-color: var(--color-primary);
}

.image-preview.has-image {
    border-style: solid;
    border-color: var(--color-border);
}

.image-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-preview span {
    font-size: 13px;
    color: var(--color-text-muted);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 28px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    padding: 14px 28px;
    background: var(--color-bg-2);
    border: 1px solid rgba(0, 255, 170, 0.3);
    border-radius: var(--radius-md);
    color: var(--color-accent);
    font-size: 14px;
    box-shadow: var(--shadow-card);
    z-index: 3000;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* 响应式 - 管理后台 */
@media (max-width: 768px) {
    .admin-header {
        padding: 12px 16px;
    }

    .admin-logo span {
        font-size: 14px;
    }

    .admin-content {
        padding: 20px 16px;
    }

    .admin-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .admin-stat {
        padding: 14px 10px;
    }

    .admin-stat .stat-value {
        font-size: 22px;
    }

    .admin-toolbar {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .admin-item-card {
        flex-direction: column;
    }

    .admin-item-image {
        width: 100%;
        height: 160px;
    }

    .admin-item-actions {
        flex-direction: row;
    }

    .login-card {
        padding: 36px 24px;
    }
}

@media (max-width: 480px) {
    .admin-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .admin-header-right {
        gap: 8px;
    }

    .admin-btn-outline {
        padding: 6px 12px;
        font-size: 12px;
    }
}