/**
 * 公共CSS - 所有页面共享
 * 搭子yyds
 */

/* ========== CSS Reset & 基础 ========== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6C5CE7;
    --primary-dark: #5A4BD1;
    --primary-light: #A29BFE;
    --secondary: #00CEC9;
    --accent: #FD79A8;
    --gradient: linear-gradient(135deg, #6C5CE7 0%, #A29BFE 50%, #00CEC9 100%);
    --gradient-warm: linear-gradient(135deg, #FD79A8 0%, #FDCB6E 100%);
    --bg: #F8F9FE;
    --bg-card: #FFFFFF;
    --text: #2D3436;
    --text-light: #636E72;
    --text-muted: #B2BEC3;
    --shadow: 0 4px 20px rgba(108, 92, 231, 0.08);
    --shadow-hover: 0 8px 40px rgba(108, 92, 231, 0.15);
    --radius: 20px;
    --radius-sm: 12px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

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

/* ========== 导航栏 ========== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(108, 92, 231, 0.08);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-light);
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-links a.active {
    color: var(--primary);
}

.nav-cta {
    background: var(--gradient) !important;
    color: white !important;
    padding: 0.6rem 1.5rem !important;
    border-radius: 50px !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.3);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(108, 92, 231, 0.4) !important;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-toggle span {
    width: 24px;
    height: 2.5px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 1rem 2.2rem;
    border-radius: 50px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 6px 25px rgba(108, 92, 231, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 35px rgba(108, 92, 231, 0.45);
}

.btn-outline {
    background: white;
    color: var(--primary);
    border: 2px solid rgba(108, 92, 231, 0.2);
}

.btn-outline:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.btn-white {
    background: white;
    color: var(--primary);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-size: 1.05rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.15);
}

.btn-white:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.2);
}

/* ========== 通用卡片 ========== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.4s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

/* ========== Footer ========== */
footer {
    background: #1A1A2E;
    color: rgba(255, 255, 255, 0.7);
    padding: 4rem 2rem 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand .logo {
    color: white;
    -webkit-text-fill-color: white;
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 1rem;
}

.footer-col h4 {
    color: white;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 0.7rem;
}

.footer-col a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.footer-col a:hover {
    color: white;
    padding-left: 5px;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a:hover {
    color: white;
}

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-toggle {
        display: flex;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* ========== 动画 ========== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.animate-fadeIn {
    animation: fadeIn 0.8s ease;
}

.animate-fadeInUp {
    animation: fadeInUp 0.8s ease;
}

/* ========== 加载状态 ========== */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(108, 92, 231, 0.1);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========== 辅助类 ========== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.hidden { display: none !important; }
.visible { display: block !important; }