/* ==================== 空军标书 - 现代设计风格 ==================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

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

:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --primary-mid: #334155;
    --surface: #1e293b;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --accent-dark: #d97706;
    --bg: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.8);
    --bg-card-hover: rgba(30, 41, 59, 0.95);
    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: rgba(148, 163, 184, 0.1);
    --border-light: rgba(148, 163, 184, 0.2);
    --gradient-1: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    --gradient-2: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 40%, #312e81 70%, #1e1b4b 100%);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
    --glass: rgba(30, 41, 59, 0.6);
    --glass-border: rgba(148, 163, 184, 0.15);
    --radius: 16px;
    --radius-sm: 10px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    overflow-x: hidden;
}

/* ====== 背景装饰 ====== */
.bg-decoration {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
}

.bg-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(148, 163, 184, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.bg-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(150px);
    opacity: 0.15;
}

.bg-glow-1 {
    width: 800px;
    height: 800px;
    background: #f59e0b;
    top: -200px;
    right: -200px;
    animation: float 20s ease-in-out infinite;
}

.bg-glow-2 {
    width: 600px;
    height: 600px;
    background: #3b82f6;
    bottom: -100px;
    left: -200px;
    animation: float 25s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* ====== 通用容器 ====== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.section-title {
    text-align: center;
    margin-bottom: 64px;
}

.section-title .badge {
    display: inline-block;
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent);
    padding: 6px 18px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 16px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-title p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ====== 玻璃导航 ====== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 12px 0;
    transition: all 0.3s;
}

.header.scrolled {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--text);
    text-decoration: none;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.logo span {
    color: var(--accent);
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text);
}

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

.btn-register {
    background: var(--gradient-2) !important;
    color: var(--bg) !important;
    padding: 10px 24px !important;
    border-radius: 25px !important;
    font-weight: 600 !important;
    transition: all 0.3s !important;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

.btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(245, 158, 11, 0.5);
}

.btn-register::after {
    display: none !important;
}

/* 移动端菜单 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: 0.3s;
    border-radius: 2px;
}

/* ====== Hero ====== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(245, 158, 11, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(99, 102, 241, 0.1) 0%, transparent 50%);
}

.hero .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

.hero-badge {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--accent-light);
    padding: 8px 24px;
    border-radius: 30px;
    font-size: 0.9rem;
    letter-spacing: 2px;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: -1px;
    max-width: 800px;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 50%, var(--accent-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.8;
}

.hero-tags {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.hero-tag {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    padding: 12px 28px;
    border-radius: 30px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.hero-tag:hover {
    border-color: var(--accent);
    color: var(--text);
    background: rgba(245, 158, 11, 0.1);
}

.hero-cta {
    display: flex;
    gap: 16px;
}

.btn-primary {
    padding: 16px 40px;
    background: var(--gradient-2);
    color: var(--bg);
    border: none;
    border-radius: 30px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(245, 158, 11, 0.6);
}

.btn-ghost {
    padding: 16px 40px;
    background: transparent;
    color: var(--text);
    border: 2px solid var(--border-light);
    border-radius: 30px;
    font-size: 1.05rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-ghost:hover {
    border-color: var(--accent);
    background: rgba(245, 158, 11, 0.1);
}

/* ====== 分割线 ====== */
.divider {
    width: 60px;
    height: 4px;
    background: var(--gradient-2);
    border-radius: 2px;
    margin: 24px auto 0;
}

/* ====== 卡片网格 ====== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 32px;
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

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

.card:hover {
    transform: translateY(-8px);
    background: var(--bg-card-hover);
    border-color: var(--accent);
    box-shadow: var(--shadow-lg);
}

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

.card-icon {
    width: 56px;
    height: 56px;
    background: rgba(245, 158, 11, 0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 24px;
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text);
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

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

.section-dark {
    background: var(--primary-light);
}

/* ====== 功能网格 ====== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature {
    text-align: center;
    padding: 32px 20px;
}

.feature-icon {
    width: 72px;
    height: 72px;
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.15);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
    transition: all 0.3s;
}

.feature:hover .feature-icon {
    background: rgba(245, 158, 11, 0.15);
    border-color: var(--accent);
    transform: scale(1.05);
}

.feature h4 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.feature p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ====== 统计数字 ====== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-item {
    text-align: center;
    padding: 40px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.3s;
}

.stat-item:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 900;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ====== CTA ====== */
.cta-section {
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at center, rgba(245, 158, 11, 0.1) 0%, transparent 70%);
}

.cta-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.cta-section .cta-subtitle {
    color: var(--text-secondary);
    font-size: 1.15rem;
    margin-bottom: 32px;
}

/* ====== 页脚 ====== */
.footer {
    border-top: 1px solid var(--border);
    padding: 48px 0 32px;
    text-align: center;
    background: var(--bg);
}

.footer-logo {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-logo span {
    color: var(--accent);
}

.footer p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ====== 页面头部 ====== */
.page-header {
    padding: 160px 0 80px;
    text-align: center;
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at center, rgba(245, 158, 11, 0.08) 0%, transparent 70%);
}

.page-header h1 {
    font-size: 2.8rem;
    font-weight: 900;
    margin-bottom: 12px;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.15rem;
}

/* ====== 价格卡片 ====== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: start;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 40px 32px;
    text-align: center;
    transition: all 0.4s;
    position: relative;
}

.pricing-card:hover {
    border-color: var(--accent);
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    border-color: var(--accent);
    background: rgba(245, 158, 11, 0.05);
    transform: scale(1.05);
    box-shadow: 0 0 40px rgba(245, 158, 11, 0.15);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-6px);
}

.pricing-badge {
    display: inline-block;
    background: var(--gradient-2);
    color: var(--bg);
    padding: 6px 18px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.pricing-name {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text);
}

.pricing-price {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--text);
    margin-bottom: 4px;
}

.pricing-price .currency {
    font-size: 1.5rem;
    vertical-align: super;
}

.pricing-price .period {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.pricing-desc {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 0.95rem;
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 32px;
}

.pricing-features li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li::before {
    content: "✓";
    color: var(--accent);
    margin-right: 10px;
    font-weight: bold;
}

.pricing-features li.disabled {
    color: var(--text-muted);
}

.pricing-features li.disabled::before {
    content: "─";
    color: var(--text-muted);
}

.pricing-btn {
    display: block;
    width: 100%;
    padding: 14px;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
}

.pricing-btn.primary {
    background: var(--gradient-2);
    color: var(--bg);
}

.pricing-btn.primary:hover {
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.4);
}

.pricing-btn.outline {
    background: transparent;
    border: 2px solid var(--border-light);
    color: var(--text);
}

.pricing-btn.outline:hover {
    border-color: var(--accent);
}

/* ====== FAQ ====== */
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    margin-bottom: 16px;
    transition: all 0.3s;
}

.faq-item:hover {
    border-color: var(--border-light);
}

.faq-item h4 {
    color: var(--text);
    margin-bottom: 8px;
    font-size: 1.05rem;
}

.faq-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ====== 服务详情 ====== */
.service-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    padding: 80px 0;
}

.service-row.reverse {
    direction: rtl;
}

.service-row.reverse > * {
    direction: ltr;
}

.service-visual {
    background: var(--gradient-1);
    border: 1px solid var(--border);
    border-radius: 24px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    position: relative;
    overflow: hidden;
}

.service-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(245, 158, 11, 0.1) 0%, transparent 70%);
}

.service-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text);
}

.service-content .service-desc {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 1.05rem;
    line-height: 1.8;
}

.service-list {
    list-style: none;
}

.service-list li {
    padding: 12px 0;
    padding-left: 28px;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 18px;
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
}

/* ====== 价格表 ====== */
.price-table {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    max-width: 900px;
    margin: 0 auto;
}

.price-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.price-row:last-child {
    border-bottom: none;
}

.price-row.header {
    background: var(--primary-light);
    font-weight: 600;
    color: var(--text);
}

.price-row > div {
    padding: 18px;
}

.price-row .highlight-price {
    color: var(--accent);
    font-weight: 700;
    font-size: 1.1rem;
}

/* ====== 上传页面 ====== */
.upload-page {
    min-height: 100vh;
    padding: 120px 0 60px;
}

.upload-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 48px;
    max-width: 800px;
    margin: 0 auto;
    backdrop-filter: blur(10px);
}

.upload-zone {
    border: 2px dashed var(--border-light);
    border-radius: 16px;
    padding: 60px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--accent);
    background: rgba(245, 158, 11, 0.05);
}

.type-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin: 24px 0;
}

.type-option {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.type-option:hover {
    border-color: var(--accent);
}

.type-option.selected {
    border-color: var(--accent);
    background: rgba(245, 158, 11, 0.1);
}

/* ====== 响应式 ====== */
@media (max-width: 992px) {
    .cards-grid, .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .service-row {
        grid-template-columns: 1fr;
    }
    .service-row.reverse {
        direction: ltr;
    }
    .pricing-card.featured {
        transform: none;
    }
    .pricing-card.featured:hover {
        transform: translateY(-6px);
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    .cards-grid, .pricing-grid, .features-grid, .stats-grid {
        grid-template-columns: 1fr;
    }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
    }
    .nav-links.active {
        display: flex;
    }
    .menu-toggle {
        display: flex;
    }
    .type-options {
        grid-template-columns: 1fr;
    }
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    .btn-primary, .btn-ghost {
        width: 100%;
        text-align: center;
    }
    .section-title h2 {
        font-size: 2rem;
    }
}