/* GoodSync Chinese Website - Common Styles */

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-red: #F74654;
    --primary-blue: #045AFF;
    --text-dark: #1a1a1a;
    --text-gray: #666666;
    --text-light: #999999;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-lighter: #fafafa;
    --border-color: #e5e5e5;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.container-fluid {
    width: 100%;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 16px;
}

h1 {
    font-size: 48px;
}

h2 {
    font-size: 36px;
}

h3 {
    font-size: 28px;
}

h4 {
    font-size: 24px;
}

h5 {
    font-size: 20px;
}

h6 {
    font-size: 18px;
}

p {
    margin-bottom: 16px;
    color: var(--text-gray);
}

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

a:hover {
    color: var(--primary-red);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 16px;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary-red);
    color: white;
    box-shadow: 0 4px 12px rgba(247, 70, 84, 0.3);
}

.btn-primary:hover {
    background-color: #e63846;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(247, 70, 84, 0.4);
}

.btn-secondary:hover {
    color: var(--text-dark);
}

.btn-outline:hover {
    color: white;
}

.btn-secondary {
    background-color: var(--bg-light);
    color: var(--text-dark);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--border-color);
    border-color: var(--text-gray);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-outline:hover {
    background-color: var(--primary-blue);
    color: white;
}

/* Section Styles */
.section {
    padding: 80px 0;
}

.section-light {
    background-color: var(--bg-light);
}

.section-white {
    background-color: var(--bg-white);
}

.section-title {
    text-align: center;
    margin-bottom: 48px;
}

.section-title h2 {
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-title p {
    font-size: 18px;
    max-width: 700px;
    margin: 0 auto;
}

/* Grid System */
.grid {
    display: grid;
    gap: 24px;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Card Styles */
.card {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.card-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.card-description {
    color: var(--text-gray);
    font-size: 15px;
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Utilities */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-16 {
    margin-top: 16px;
}

.mt-24 {
    margin-top: 24px;
}

.mt-32 {
    margin-top: 32px;
}

.mb-16 {
    margin-bottom: 16px;
}

.mb-24 {
    margin-bottom: 24px;
}

.mb-32 {
    margin-bottom: 32px;
}

/* Responsive */
@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }

    h1 {
        font-size: 42px;
    }

    h2 {
        font-size: 32px;
    }

    h3 {
        font-size: 26px;
    }
}

@media (max-width: 768px) {
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 36px;
    }

    h2 {
        font-size: 28px;
    }

    h3 {
        font-size: 24px;
    }

    .section {
        padding: 60px 0;
    }

    .btn {
        padding: 10px 24px;
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    h1 {
        font-size: 30px;
    }

    h2 {
        font-size: 24px;
    }

    .section {
        padding: 48px 0;
    }
}

/* Chinese-English spacing */
.chinese-en {
    letter-spacing: 0.5px;
}

/* Icon styles */
.icon {
    display: inline-block;
    vertical-align: middle;
}

.icon svg {
    width: 20px;
    height: 20px;
}

/* Loading state */
.loading {
    opacity: 0.6;
    pointer-events: none;
}