/* =====================================
   SMS接码平台 - 专业高级版样式表
   ===================================== */

:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --secondary: #0ea5e9;
    --dark: #0f172a;
    --dark-lighter: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    --card-bg: #1e293b;
}

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

body {
    font-family: 'Inter', 'Plus Jakarta Sans', -apple-system, sans-serif;
    background-color: var(--dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 动态背景 */
.bg-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(circle at 50% -20%, #2563eb33, transparent),
                radial-gradient(circle at 0% 100%, #6366f122, transparent);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.25rem 0;
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: #fff;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo i {
    color: var(--primary);
    filter: drop-shadow(0 0 8px var(--primary));
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
    align-items: center;
}

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

.nav-links a:hover {
    color: #fff;
}

/* 按钮 */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 15px -3px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px -5px rgba(99, 102, 241, 0.5);
}

.btn-outline {
    border: 1px solid var(--glass-border);
    color: #fff;
    background: var(--glass);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: #fff;
}

/* Hero 区域 */
.hero {
    padding: 180px 1.5rem 100px;
    text-align: center;
    position: relative;
}

.hero-tag {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 99px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: inline-block;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(to bottom right, #fff 30%, rgba(255,255,255,0.5));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 650px;
    margin: 0 auto 2.5rem;
}

/* 统计数据 */
.stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 4rem;
    padding: 2rem;
    background: var(--glass);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.stat-item h4 {
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
}

.stat-item p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

/* 特性卡片 */
.section {
    padding: 100px 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    background: rgba(30, 41, 59, 0.8);
}

.feature-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    display: block;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-muted);
}

/* 价格卡片 */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.pricing-card {
    background: var(--card-bg);
    padding: 3rem 2rem;
    border-radius: 32px;
    border: 1px solid var(--glass-border);
    text-align: center;
    transition: all 0.4s;
}

.pricing-card.featured {
    background: linear-gradient(180deg, rgba(99, 102, 241, 0.1) 0%, rgba(30, 41, 59, 1) 100%);
    border: 1px solid var(--primary);
    position: relative;
}

.pricing-card.featured::after {
    content: 'RECOMMENDED';
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: var(--primary);
    font-size: 0.65rem;
    font-weight: 800;
    padding: 0.25rem 0.75rem;
    border-radius: 99px;
}

.price {
    font-size: 3.5rem;
    font-weight: 800;
    margin: 1.5rem 0;
}

.price span {
    font-size: 1rem;
    color: var(--text-muted);
}

.pricing-list {
    list-style: none;
    margin: 2rem 0;
    text-align: left;
}

.pricing-list li {
    margin-bottom: 1rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.pricing-list li i {
    color: #10b981;
}

/* 页脚 */
.footer {
    border-top: 1px solid var(--glass-border);
    padding: 80px 1.5rem 40px;
    background: rgba(15, 23, 42, 0.5);
}

.footer-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-logo {
    margin-bottom: 1.5rem;
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.footer h4 {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 0.75rem;
}

.footer ul a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s;
}

.footer ul a:hover {
    color: #fff;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.875rem;
}

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

@media (max-width: 768px) {
    .hero h1 { font-size: 2.75rem; }
    .nav-links { display: none; }
    .stats { flex-direction: column; gap: 2rem; text-align: center; }
    .footer-grid { grid-template-columns: 1fr; }
}