/* ===== 全局重置 & 变量 ===== */
:root {
    --primary: #e94e77;
    --primary-dark: #c73c5a;
    --primary-light: #ff7a9e;
    --secondary: #6c5ce7;
    --accent: #fd79a8;
    --dark: #1a1a2e;
    --dark2: #16213e;
    --light: #f8f9fa;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --white: #ffffff;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.15);
    --radius: 20px;
    --radius-sm: 12px;
    --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    color: var(--dark);
    background: var(--light);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-header h2 {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-header .highlight {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray);
    max-width: 500px;
    margin: 0 auto;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 60px;
    font-weight: 600;
    font-size: 1rem;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border-color: var(--primary);
    box-shadow: 0 8px 24px rgba(233, 78, 119, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 32px rgba(233, 78, 119, 0.4);
}

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

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

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

.btn-outline-light:hover {
    background: var(--white);
    color: var(--dark);
    transform: translateY(-2px);
}

/* ===== 顶部导航 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(26, 26, 46, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 1.8rem;
    color: var(--primary-light);
    filter: drop-shadow(0 0 8px rgba(233, 78, 119, 0.4));
    animation: pulseHeart 2s infinite;
}

@keyframes pulseHeart {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.logo-text {
    font-size: 1.6rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.main-nav ul {
    display: flex;
    gap: 32px;
}

.main-nav a {
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 4px 0;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-light);
    transition: var(--transition);
    border-radius: 4px;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--white);
}

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

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.6rem;
    cursor: pointer;
    padding: 4px;
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark2) 50%, #0f3460 100%);
    position: relative;
    overflow: hidden;
    padding-top: 72px;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 50%, rgba(233, 78, 119, 0.15), transparent 60%),
                radial-gradient(circle at 80% 20%, rgba(108, 92, 231, 0.2), transparent 50%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-text h1 {
    font-size: 3.4rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--white);
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-text p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 480px;
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--white);
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 4px;
}

.hero-visual {
    display: flex;
    justify-content: center;
}

.hero-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius);
    padding: 32px 28px;
    width: 280px;
    text-align: center;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-16px); }
}

.hero-card-img i {
    font-size: 5rem;
    color: var(--primary-light);
    margin-bottom: 16px;
    filter: drop-shadow(0 8px 24px rgba(233, 78, 119, 0.3));
}

.hero-card-info h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 4px;
}

.hero-card-info p {
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 12px;
}

.match-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(233, 78, 119, 0.3);
    color: var(--primary-light);
    padding: 6px 16px;
    border-radius: 60px;
    font-weight: 600;
    font-size: 0.9rem;
}

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

.feature-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px 28px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.02);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(233, 78, 119, 0.1), rgba(108, 92, 231, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
    color: var(--primary);
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* ===== 会员区域 ===== */
.members {
    background: var(--white);
}

.members-filter {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 24px;
    border-radius: 60px;
    border: 2px solid var(--gray-light);
    background: var(--white);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--gray);
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(233, 78, 119, 0.3);
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--light);
    border-radius: 60px;
    padding: 0 16px;
    border: 2px solid var(--gray-light);
    transition: var(--transition);
    min-width: 220px;
}

.search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(233, 78, 119, 0.1);
}

.search-box i {
    color: var(--gray);
    margin-right: 8px;
}

.search-box input {
    border: none;
    background: transparent;
    padding: 10px 0;
    font-size: 0.95rem;
    outline: none;
    width: 100%;
    font-family: var(--font);
}

.members-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.member-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px 20px 28px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.02);
    position: relative;
    overflow: hidden;
}

.member-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    opacity: 0;
    transition: var(--transition);
}

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

.member-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.member-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 2.8rem;
    color: var(--white);
    box-shadow: 0 8px 24px rgba(233, 78, 119, 0.2);
}

.member-card h4 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.member-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
    margin: 10px 0;
}

.member-tags span {
    background: var(--light);
    padding: 4px 12px;
    border-radius: 60px;
    font-size: 0.8rem;
    color: var(--gray);
}

.member-action {
    margin-top: 16px;
}

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

.members-more {
    text-align: center;
    margin-top: 40px;
}

/* ===== 成功故事 ===== */
.testimonials {
    background: var(--light);
}

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

.testimonial-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.testimonial-card .quote {
    font-size: 1rem;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-card .quote::before {
    content: '\201C';
    font-size: 3rem;
    color: var(--primary-light);
    opacity: 0.3;
    line-height: 0;
    vertical-align: -0.5rem;
    margin-right: 4px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 14px;
    border-top: 1px solid var(--gray-light);
    padding-top: 18px;
}

.testimonial-author i {
    font-size: 2.4rem;
    color: var(--primary-light);
}

.author-info h4 {
    font-weight: 700;
    font-size: 1rem;
}

.author-info span {
    font-size: 0.85rem;
    color: var(--gray);
}

/* ===== CTA ===== */
.cta {
    padding: 40px 0 80px;
    background: var(--white);
}

.cta-card {
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark2) 100%);
    border-radius: var(--radius);
    padding: 64px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 30%, rgba(233, 78, 119, 0.15), transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(108, 92, 231, 0.1), transparent 50%);
    pointer-events: none;
}

.cta-content {
    position: relative;
    z-index: 2;
}

.cta-content h2 {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 12px;
}

.cta-content p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 32px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* ===== 页脚 ===== */
.site-footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.7);
    padding-top: 60px;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.95rem;
    max-width: 300px;
    margin-bottom: 20px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

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

.link-group h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.link-group ul li {
    margin-bottom: 10px;
}

.link-group a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
}

.link-group a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.3);
}

/* ===== 回到顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(233, 78, 119, 0.3);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 32px rgba(233, 78, 119, 0.4);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .members-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-inner {
        height: 64px;
    }
    .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(26, 26, 46, 0.98);
        backdrop-filter: blur(20px);
        padding: 20px 24px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        transform: translateY(-120%);
        opacity: 0;
        transition: var(--transition);
        pointer-events: none;
    }
    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    .main-nav ul {
        flex-direction: column;
        gap: 16px;
    }
    .menu-toggle {
        display: block;
    }
    .header-actions .btn-outline,
    .header-actions .btn-primary {
        display: none;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    .hero-text h1 {
        font-size: 2.4rem;
    }
    .hero-text p {
        margin-left: auto;
        margin-right: auto;
    }
    .hero-actions {
        justify-content: center;
    }
    .hero-stats {
        justify-content: center;
        gap: 24px;
    }
    .hero-visual {
        display: none;
    }

    .section {
        padding: 60px 0;
    }
    .section-header h2 {
        font-size: 1.8rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .members-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .members-filter {
        flex-direction: column;
        align-items: stretch;
    }
    .search-box {
        min-width: auto;
    }

    .cta-card {
        padding: 40px 20px;
    }
    .cta-content h2 {
        font-size: 1.8rem;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .footer-links {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    .members-grid {
        grid-template-columns: 1fr;
    }
    .hero-text h1 {
        font-size: 1.9rem;
    }
    .hero-stats {
        flex-direction: column;
        gap: 12px;
    }
    .stat-number {
        font-size: 1.6rem;
    }
}