/* ===== CSS 重置 & 全局 ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root {
    --bg-primary: #070b14;
    --bg-secondary: #0f172a;
    --bg-card: rgba(15, 23, 42, 0.85);
    --text-primary: #e8edf5;
    --text-secondary: #94a3b8;
    --gold: #f0b90b;
    --gold-glow: rgba(240, 185, 11, 0.4);
    --blue: #3b82f6;
    --blue-glow: rgba(59, 130, 246, 0.3);
    --purple: #8b5cf6;
    --purple-glow: rgba(139, 92, 246, 0.3);
    --border-glow: rgba(59, 130, 246, 0.15);
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Rajdhani', sans-serif;
    --nav-height: 72px;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}
a {
    color: var(--blue);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover {
    color: var(--gold);
}
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--blue);
    border-radius: 8px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--gold);
}

/* ===== 粒子背景 Canvas ===== */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 48px;
    background: rgba(7, 11, 20, 0.82);
    backdrop-filter: blur(16px) saturate(1.2);
    border-bottom: 1px solid rgba(59, 130, 246, 0.12);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
    transition: background var(--transition);
}
.navbar.scrolled {
    background: rgba(7, 11, 20, 0.95);
    border-bottom-color: rgba(240, 185, 11, 0.2);
}
.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    letter-spacing: 2px;
    user-select: none;
}
.nav-brand .brand-icon {
    font-size: 1.8rem;
    color: var(--gold);
    filter: drop-shadow(0 0 8px var(--gold-glow));
}
.nav-brand span {
    background: linear-gradient(135deg, var(--gold), #ffd966);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
}
.nav-links li a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: all var(--transition);
    position: relative;
    letter-spacing: 0.3px;
    font-family: var(--font-body);
}
.nav-links li a i {
    font-size: 0.9rem;
    opacity: 0.7;
}
.nav-links li a:hover,
.nav-links li a.active {
    color: #fff;
    background: rgba(59, 130, 246, 0.08);
}
.nav-links li a.active {
    color: var(--gold);
    background: rgba(240, 185, 11, 0.06);
}
.nav-links li a.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--gold);
    border-radius: 4px;
    box-shadow: 0 0 12px var(--gold-glow);
}
.nav-links li a .badge {
    font-size: 0.6rem;
    background: var(--gold);
    color: #000;
    padding: 1px 8px;
    border-radius: 20px;
    font-weight: 700;
    margin-left: 2px;
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 6px;
    background: transparent;
    border: none;
}
.nav-toggle span {
    display: block;
    width: 26px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 4px;
    transition: all var(--transition);
}
.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===== 页面容器 ===== */
.page-container {
    position: relative;
    z-index: 1;
    padding-top: var(--nav-height);
    min-height: 100vh;
}
.page {
    padding: 60px 48px 80px;
    max-width: 1280px;
    margin: 0 auto;
    animation: fadeUp 0.5s ease forwards;
}
@keyframes fadeUp {
    0% {
        opacity: 0;
        transform: translateY(24px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== 通用组件 ===== */
.section-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 2.6rem;
    letter-spacing: 2px;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #fff 30%, var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.section-sub {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
    border-left: 3px solid var(--gold);
    padding-left: 20px;
    font-weight: 300;
    letter-spacing: 0.5px;
}
.glow-card {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(59, 130, 246, 0.08);
    border-radius: 16px;
    padding: 28px 32px;
    transition: all var(--transition);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}
.glow-card:hover {
    border-color: rgba(240, 185, 11, 0.2);
    box-shadow: 0 8px 40px rgba(240, 185, 11, 0.04), 0 0 60px rgba(59, 130, 246, 0.02);
    transform: translateY(-2px);
}
.glow-card .card-icon {
    font-size: 2.2rem;
    color: var(--gold);
    margin-bottom: 12px;
    display: inline-block;
}
.glow-card h3 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.2rem;
    letter-spacing: 1px;
    margin-bottom: 8px;
}
.glow-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}
.btn-gold {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 32px;
    background: linear-gradient(135deg, var(--gold), #d4a000);
    color: #0a0e1a;
    font-weight: 700;
    font-size: 1rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font-body);
    letter-spacing: 0.5px;
    box-shadow: 0 4px 20px rgba(240, 185, 11, 0.25);
}
.btn-gold:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 32px rgba(240, 185, 11, 0.4);
    color: #0a0e1a;
}
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 28px;
    background: transparent;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
    border: 1.5px solid rgba(59, 130, 246, 0.3);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font-body);
    letter-spacing: 0.5px;
}
.btn-outline:hover {
    border-color: var(--gold);
    color: var(--gold);
    box-shadow: 0 0 30px rgba(240, 185, 11, 0.05);
}
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}
.grid-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 28px;
}
.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

/* ===== 各页面特有样式 ===== */

/* 主页 */
#home .hero {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 70vh;
    padding: 20px 0;
}
#home .hero .tag {
    display: inline-block;
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 0.8rem;
    letter-spacing: 4px;
    color: var(--gold);
    border: 1px solid rgba(240, 185, 11, 0.2);
    padding: 4px 16px;
    border-radius: 40px;
    margin-bottom: 20px;
    width: fit-content;
    background: rgba(240, 185, 11, 0.04);
}
#home .hero h1 {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 4.8rem;
    letter-spacing: 6px;
    line-height: 1.1;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #fff 20%, var(--gold) 60%, #ffd966);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 60px rgba(240, 185, 11, 0.08);
}
#home .hero p.lead {
    font-size: 1.3rem;
    color: var(--text-secondary);
    max-width: 720px;
    font-weight: 300;
    letter-spacing: 0.5px;
    margin-bottom: 32px;
}
#home .hero .stats {
    display: flex;
    gap: 48px;
    margin-top: 20px;
    flex-wrap: wrap;
}
#home .hero .stats .stat-item {
    display: flex;
    flex-direction: column;
}
#home .hero .stats .stat-item .num {
    font-family: var(--font-display);
    font-size: 2.6rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 1px;
}
#home .hero .stats .stat-item .num .gold {
    color: var(--gold);
}
#home .hero .stats .stat-item .label {
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 300;
}
#home .news-section {
    margin-top: 60px;
}
#home .news-section .news-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
#home .news-section .news-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 20px;
    background: rgba(15, 23, 42, 0.4);
    border-radius: 10px;
    border-left: 3px solid var(--blue);
    transition: all var(--transition);
}
#home .news-section .news-item:hover {
    background: rgba(15, 23, 42, 0.7);
    border-left-color: var(--gold);
}
#home .news-section .news-item .time {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
    min-width: 80px;
    font-family: var(--font-display);
    letter-spacing: 0.5px;
}
#home .news-section .news-item .content {
    color: var(--text-primary);
    font-weight: 400;
}
#home .news-section .news-item .content .tag {
    display: inline-block;
    font-size: 0.6rem;
    background: rgba(240, 185, 11, 0.15);
    color: var(--gold);
    padding: 1px 10px;
    border-radius: 20px;
    margin-left: 10px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* 同盟介绍 */
#about .about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    margin-top: 16px;
}
#about .about-grid .main-text p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 20px;
    line-height: 1.8;
}
#about .about-grid .main-text .highlight-box {
    border-left: 3px solid var(--gold);
    padding: 16px 24px;
    background: rgba(240, 185, 11, 0.04);
    border-radius: 0 8px 8px 0;
    margin: 16px 0;
}
#about .about-grid .main-text .highlight-box strong {
    color: var(--gold);
}
#about .about-grid .side-cards {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
#about .about-grid .side-cards .mini-card {
    background: var(--bg-card);
    padding: 20px 24px;
    border-radius: 12px;
    border: 1px solid rgba(59, 130, 246, 0.06);
    transition: all var(--transition);
}
#about .about-grid .side-cards .mini-card:hover {
    border-color: rgba(240, 185, 11, 0.15);
}
#about .about-grid .side-cards .mini-card h4 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 1px;
    color: var(--gold);
    margin-bottom: 4px;
}
#about .about-grid .side-cards .mini-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}
#about .about-grid .side-cards .mini-card .qq-num {
    font-family: var(--font-display);
    color: var(--gold);
    font-size: 1.1rem;
    letter-spacing: 1px;
}

/* 加入我们 */
#join .join-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 16px;
}
#join .join-wrapper .info-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
#join .join-wrapper .info-card .contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 20px;
    background: rgba(15, 23, 42, 0.4);
    border-radius: 10px;
    border: 1px solid rgba(59, 130, 246, 0.04);
}
#join .join-wrapper .info-card .contact-item i {
    font-size: 1.4rem;
    color: var(--gold);
    min-width: 32px;
}
#join .join-wrapper .info-card .contact-item .info {
    color: var(--text-secondary);
}
#join .join-wrapper .info-card .contact-item .info strong {
    color: var(--text-primary);
    font-weight: 600;
}
#join .join-wrapper .qr-placeholder {
    text-align: center;
    padding: 20px;
    background: rgba(15, 23, 42, 0.3);
    border-radius: 12px;
    border: 1px dashed rgba(240, 185, 11, 0.2);
}
#join .join-wrapper .qr-placeholder i {
    font-size: 3rem;
    color: var(--gold);
    opacity: 0.6;
}
#join .join-wrapper .qr-placeholder p {
    color: var(--text-secondary);
    margin-top: 8px;
}

/* 实用工具 (建设中) */
#tools .under-construction {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    text-align: center;
}
#tools .under-construction i {
    font-size: 4rem;
    color: var(--gold);
    margin-bottom: 20px;
    opacity: 0.5;
}
#tools .under-construction h2 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 2rem;
    letter-spacing: 2px;
    color: var(--text-primary);
    margin-bottom: 12px;
}
#tools .under-construction p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 400px;
}

/* 合作 */
#coop .coop-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 16px;
}
#coop .coop-grid .info-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
#coop .coop-grid .info-card .contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 20px;
    background: rgba(15, 23, 42, 0.4);
    border-radius: 10px;
    border: 1px solid rgba(59, 130, 246, 0.04);
}
#coop .coop-grid .info-card .contact-item i {
    font-size: 1.4rem;
    color: var(--gold);
    min-width: 32px;
}
#coop .coop-grid .info-card .contact-item .info {
    color: var(--text-secondary);
}
#coop .coop-grid .info-card .contact-item .info strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* 成员登录 & 内部主页 */
#login .login-wrapper {
    max-width: 600px;
    margin: 20px auto 0;
    padding: 40px 36px;
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(59, 130, 246, 0.06);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
#login .login-wrapper .login-header {
    text-align: center;
    margin-bottom: 32px;
}
#login .login-wrapper .login-header .icon {
    font-size: 3rem;
    color: var(--gold);
    margin-bottom: 8px;
    display: inline-block;
}
#login .login-wrapper .login-header h2 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.6rem;
    letter-spacing: 2px;
}
#login .login-wrapper .login-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}
#login .login-wrapper .form-group {
    margin-bottom: 20px;
}
#login .login-wrapper .form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}
#login .login-wrapper .form-group input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(7, 11, 20, 0.6);
    border: 1px solid rgba(59, 130, 246, 0.08);
    border-radius: 8px;
    color: #fff;
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: all var(--transition);
}
#login .login-wrapper .form-group input:focus {
    border-color: var(--gold);
    box-shadow: 0 0 20px rgba(240, 185, 11, 0.04);
}
#login .login-wrapper .login-status {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
}
#login .login-wrapper .login-status.success {
    background: rgba(34, 197, 94, 0.08);
    color: #4ade80;
    border: 1px solid rgba(34, 197, 94, 0.1);
}
#login .login-wrapper .login-status.error {
    background: rgba(239, 68, 68, 0.08);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.1);
}
#login .login-wrapper .login-status.info {
    background: rgba(59, 130, 246, 0.06);
    color: var(--blue);
    border: 1px solid rgba(59, 130, 246, 0.08);
}
#internal-dashboard {
    display: none;
    margin-top: 16px;
}
#internal-dashboard.active {
    display: block;
}
#internal-dashboard .dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 16px;
}
#internal-dashboard .dashboard-grid .dash-card {
    background: rgba(15, 23, 42, 0.6);
    padding: 20px 24px;
    border-radius: 12px;
    border: 1px solid rgba(59, 130, 246, 0.06);
}
#internal-dashboard .dashboard-grid .dash-card h4 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 1px;
    color: var(--gold);
    margin-bottom: 8px;
}
#internal-dashboard .dashboard-grid .dash-card p,
#internal-dashboard .dashboard-grid .dash-card li {
    color: var(--text-secondary);
    font-size: 0.9rem;
}
#internal-dashboard .dashboard-grid .dash-card ul {
    list-style: none;
    padding: 0;
}
#internal-dashboard .dashboard-grid .dash-card ul li {
    padding: 4px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}
#internal-dashboard .dashboard-grid .dash-card ul li:last-child {
    border-bottom: none;
}
#internal-dashboard .welcome-banner {
    padding: 16px 20px;
    background: rgba(240, 185, 11, 0.04);
    border-radius: 12px;
    border: 1px solid rgba(240, 185, 11, 0.08);
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}
#internal-dashboard .welcome-banner .greeting {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-primary);
}
#internal-dashboard .welcome-banner .greeting span {
    color: var(--gold);
}
#internal-dashboard .welcome-banner .logout-btn {
    background: transparent;
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #f87171;
    padding: 6px 18px;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font-body);
    font-weight: 500;
}
#internal-dashboard .welcome-banner .logout-btn:hover {
    background: rgba(239, 68, 68, 0.08);
    border-color: #f87171;
}

/* ===== Footer ===== */
.site-footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 32px 48px 24px;
    border-top: 1px solid rgba(59, 130, 246, 0.04);
    color: var(--text-secondary);
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}
.site-footer .footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}
.site-footer .footer-links a {
    color: var(--text-secondary);
    font-size: 0.8rem;
    transition: color var(--transition);
}
.site-footer .footer-links a:hover {
    color: var(--gold);
}
.site-footer .footer-brand {
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 3px;
    color: rgba(255, 255, 255, 0.08);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .page {
        padding: 40px 28px 60px;
    }
    .grid-4 {
        grid-template-columns: 1fr 1fr;
    }
    #about .about-grid {
        grid-template-columns: 1fr;
    }
    #join .join-wrapper {
        grid-template-columns: 1fr;
    }
    #coop .coop-grid {
        grid-template-columns: 1fr;
    }
    #home .hero h1 {
        font-size: 3.2rem;
    }
    #internal-dashboard .dashboard-grid {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 768px) {
    .navbar {
        padding: 0 20px;
    }
    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        flex-direction: column;
        background: rgba(7, 11, 20, 0.98);
        backdrop-filter: blur(20px);
        padding: 20px 24px 32px;
        gap: 4px;
        transform: translateY(-120%);
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border-bottom: 1px solid rgba(59, 130, 246, 0.06);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
    }
    .nav-links.open {
        transform: translateY(0);
    }
    .nav-links li a {
        padding: 12px 16px;
        width: 100%;
        justify-content: center;
        font-size: 1rem;
    }
    .nav-toggle {
        display: flex;
    }
    .page {
        padding: 28px 16px 40px;
    }
    .section-title {
        font-size: 2rem;
    }
    #home .hero h1 {
        font-size: 2.4rem;
        letter-spacing: 3px;
    }
    #home .hero .stats {
        gap: 24px;
    }
    #home .hero .stats .stat-item .num {
        font-size: 2rem;
    }
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    #login .login-wrapper {
        padding: 28px 20px;
    }
    .site-footer {
        padding: 24px 16px 16px;
    }
    .site-footer .footer-links {
        gap: 12px;
    }
}
@media (max-width: 480px) {
    #home .hero h1 {
        font-size: 1.8rem;
    }
    #home .hero .stats .stat-item .num {
        font-size: 1.6rem;
    }
    .glow-card {
        padding: 20px 18px;
    }
}