/* 伊斯兰几何纹理与深蓝/金色经典配色 */
:root {
    --primary-bg: #0B132B;
    --secondary-bg: #1C2541;
    --gold: #D4AF37;
    --gold-light: #F9E596;
    --text-main: #EAEAEA;
    --text-muted: #A0A5B5;
    --border-color: rgba(212, 175, 55, 0.3);
    
    --pricing-bg-1: #151928;
    --pricing-bg-2: #1e2646;
    
    /* 正楷体 */
    --font-family: 'KaiTi', 'STKaiti', 'SimKai', serif;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--primary-bg);
    color: var(--text-main);
    font-family: var(--font-family);
    line-height: 1.6;
    background-image: 
        radial-gradient(circle at 50% 50%, rgba(212, 175, 55, 0.05) 0%, transparent 50%),
        repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(28, 37, 65, 0.4) 10px, rgba(28, 37, 65, 0.4) 20px);
    background-attachment: fixed;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--gold);
    font-weight: bold;
}

a {
    color: var(--gold-light);
    text-decoration: none;
    transition: color 0.3s ease, text-shadow 0.3s;
}

a:hover {
    color: #fff;
    text-shadow: 0 0 8px var(--gold);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: rgba(11, 19, 43, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo a {
    font-size: 28px;
    color: var(--gold);
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo span {
    color: #fff;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
    margin: 0;
    padding: 0;
    align-items: center;
}

nav a {
    font-size: 18px;
    color: var(--text-main);
}
nav a:hover {
    color: var(--gold);
}

.btn-nav {
    background: linear-gradient(135deg, var(--gold), #B8860B);
    color: var(--primary-bg) !important;
    padding: 8px 20px;
    border-radius: 4px;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.4);
}
.btn-nav:hover {
    background: linear-gradient(135deg, #F9E596, var(--gold));
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 100px 20px;
    position: relative;
    overflow: hidden;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 0 0 20px rgba(212, 175, 55, 0.5);
}

.hero p {
    font-size: 20px;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gold), #996515);
    color: #000;
    padding: 15px 35px;
    font-size: 20px;
    border-radius: 30px;
    font-weight: bold;
    box-shadow: 0 8px 20px rgba(212, 175, 55, 0.4);
    transition: all 0.3s ease;
}
.btn-primary:hover {
    transform: translateY(-3px) scale(1.05);
}

.btn-secondary {
    background: transparent;
    color: var(--gold);
    border: 2px solid var(--gold);
    padding: 13px 33px;
    font-size: 20px;
    border-radius: 30px;
    transition: all 0.3s;
}
.btn-secondary:hover {
    background: rgba(212, 175, 55, 0.1);
}

section {
    padding: 80px 20px;
    border-top: 1px solid rgba(255,255,255,0.05);
}
section h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    position: relative;
}
section h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--gold);
    margin: 15px auto 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}
.feature-item {
    background: var(--secondary-bg);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.3s;
}
.feature-item:hover {
    transform: translateY(-10px);
    border-color: var(--gold);
}
.feature-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

/* Pricing */
.pricing-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-top: -30px;
    margin-bottom: 50px;
    font-size: 18px;
}
.pricing-grid {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}
.pricing-card {
    background: var(--pricing-bg-1);
    border-radius: 16px;
    padding: 40px 30px;
    width: 320px;
    box-sizing: border-box;
    border: 1px solid rgba(255,255,255,0.1);
    position: relative;
    transition: transform 0.3s;
}
.pricing-card.highlighted {
    background: linear-gradient(180deg, var(--pricing-bg-2) 0%, var(--pricing-bg-1) 100%);
    border-color: rgba(212, 175, 55, 0.5);
    transform: scale(1.05);
}
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.card-header h3 {
    margin: 0;
    color: #fff;
    font-size: 20px;
}
.badge {
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: bold;
}
.badge-gray {
    background: #333;
    color: #ccc;
}
.badge-gold {
    background: var(--gold);
    color: #000;
}
.card-price {
    font-size: 42px;
    font-weight: bold;
    color: #fff;
    margin-bottom: 10px;
}
.currency { font-size: 24px; margin-right: 5px; }
.period { font-size: 16px; color: var(--text-muted); font-weight: normal; }
.card-desc {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 30px;
    min-height: 42px;
}
.feature-list {
    list-style: none;
    padding: 0;
    margin: 0 0 40px 0;
}
.feature-list li {
    margin-bottom: 15px;
    color: #ddd;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.btn-outline, .btn-primary-card {
    display: block;
    text-align: center;
    padding: 12px;
    border-radius: 8px;
    font-size: 16px;
    transition: 0.3s;
}
.btn-outline {
    border: 1px solid #555;
    color: #fff;
}
.btn-primary-card {
    background: linear-gradient(90deg, #5b86e5, #36D1DC);
    color: #fff;
    border: none;
    font-weight: bold;
}

.tutorial-box {
    background: var(--secondary-bg);
    padding: 40px;
    border-radius: 12px;
    border-left: 5px solid var(--gold);
    max-width: 800px;
    margin: 0 auto;
}
.tutorial-box p {
    font-size: 18px;
    line-height: 2;
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}
.article-card {
    background: rgba(28, 37, 65, 0.6);
    border: 1px solid rgba(212, 175, 55, 0.2);
    border-radius: 8px;
    padding: 20px;
    transition: all 0.3s;
}
.article-card h3 {
    margin-top: 0;
    font-size: 18px;
}
.article-card p {
    color: var(--text-muted);
    font-size: 14px;
}

.article-meta {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 40px;
    font-size: 14px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}
.article-body p {
    text-indent: 2em;
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 25px;
}
.article-body h2 {
    text-align: left;
    font-size: 24px;
    margin-top: 40px;
    border-left: 4px solid var(--gold);
    padding-left: 15px;
}

.internal-links, .faq-section {
    margin-top: 60px;
    background: var(--secondary-bg);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}
.internal-links ul {
    list-style: square;
    padding-left: 20px;
}
.internal-links li {
    margin-bottom: 10px;
}
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.faq-item h4 {
    margin: 0 0 10px 0;
    color: var(--gold-light);
    font-size: 18px;
}
.faq-item p {
    margin: 0;
    color: var(--text-muted);
    font-size: 16px;
}

footer {
    background: #050914;
    padding: 40px 20px;
    text-align: center;
    border-top: 2px solid var(--gold);
    color: var(--text-muted);
}