/* Base Styles */
:root {
    --primary-color: #E60012; /* 中国红 */
    --secondary-color: #003A8C; /* 深蓝 */
    --accent-color: #FFD700; /* 金黄 */
    --dark-gray: #333333;
    --medium-gray: #666666;
    --light-gray: #999999;
    --ultra-light-gray: #F5F5F5;
    --white: #FFFFFF;
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;
}

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

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
}

h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Header Styles */
header {
    padding: 2rem 0;
    text-align: center;
    border-bottom: 1px solid var(--ultra-light-gray);
    position: relative;
}

.logo {
    display: inline-block;
}

.tagline {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--medium-gray);
    margin-top: -0.5rem;
}

/* Language Switcher */
.language-switcher {
    position: absolute;
    top: 1rem;
    right: 1rem;
}

#lang-switch {
    background-color: var(--secondary-color);
    color: var(--white);
    border: none;
    border-radius: 4px;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#lang-switch:hover {
    background-color: var(--primary-color);
}

/* Main Content Styles */
main {
    padding: 3rem 0;
}

.hero {
    text-align: center;
    margin-bottom: 3rem;
}

.intro {
    max-width: 800px;
    margin: 0 auto 2rem;
    font-size: 1.1rem;
    color: var(--medium-gray);
}

.coming-soon {
    margin: 2rem 0;
}

.countdown {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.countdown-item span:first-child {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    background-color: var(--ultra-light-gray);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    min-width: 80px;
    text-align: center;
}

.countdown-item span:last-child {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--medium-gray);
}

/* Features Section */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.feature-item {
    text-align: center;
    padding: 1.5rem;
    border-radius: 8px;
    background-color: var(--ultra-light-gray);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.feature-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-item h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

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

/* Subscription Section */
.subscription {
    text-align: center;
    margin: 4rem 0;
    padding: 3rem;
    background-color: var(--ultra-light-gray);
    border-radius: 12px;
}

.subscription-form {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 500px;
    margin: 2rem auto;
}

.form-button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.form-button:hover {
    background-color: #c50010;
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
    color: var(--white);
}

.form-button i {
    margin-right: 0.5rem;
}

.form-note {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--medium-gray);
}

.google-form-container {
    width: 100%;
    max-width: 640px;
    margin: 2rem auto;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    background-color: var(--white);
}

.google-form-container iframe {
    width: 100%;
    border: none;
    min-height: 450px; /* 确保足够的高度显示完整表单 */
    display: block;
}

.privacy-notice {
    font-size: 0.85rem;
    color: var(--light-gray);
    margin-top: 2rem;
}

/* Footer Styles */
footer {
    padding: 2rem 0;
    border-top: 1px solid var(--ultra-light-gray);
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.contact {
    margin-top: 0.5rem;
}

/* Responsive Styles */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.7rem;
    }

    .countdown {
        gap: 1rem;
    }

    .countdown-item span:first-child {
        font-size: 2rem;
        min-width: 60px;
    }

    .subscription-form {
        flex-direction: column;
    }

    .subscription-form input {
        border-radius: 4px;
        margin-bottom: 1rem;
    }

    .subscription-form button {
        border-radius: 4px;
    }

    .language-switcher {
        position: static;
        margin-top: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .features {
        grid-template-columns: 1fr;
    }

    .countdown {
        flex-wrap: wrap;
    }

    .countdown-item {
        width: 45%;
        margin-bottom: 1rem;
    }
}