:root {
    --primary-orange: #FF6B00;
    --bg-color: #FFFFFF;
    --text-main: #1F2937;
    --text-sub: #6B7280;
    --btn-blue: #4285F4;

    /* 恢复至常规规范 */
    --btn-bg: #E1ECFA;
    --text-black: #191919;
    --btn-text-gray: #5B6573;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
/* 全局 Roboto Medium */
body {
    background: #f5f5f5;
    display: flex;
    justify-content: center;
    font-family: "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    font-weight: 500; /* Roboto‑Medium */
}
.app-container { width: 100%; max-width: 480px; background: var(--bg-color); min-height: 100vh; padding: 31px; position: relative; }

/* header 导航：强制恢复原有系统字体，不使用Roboto */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    padding-top: 20px;
}
header .nav-links {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif !important;
    display: flex;
    gap: 20px;
    font-size: 20px;
    font-weight: 600;
    color: #000;
}
.logo { height: 42px; margin-top: -28px; }
.nav-links a {
    text-decoration: none;
    color: #000;
}
.nav-links a.active {color: #eb6a2e; border-bottom: 2px solid #eb6a2e;}

/* --- 商店按钮区域 --- */
.store-buttons {
    display: flex;
    gap: 15px;
    margin: 25px 0 25px 0;
}
.store-btn {
    flex: 1;
    max-width: 175px;
    background-color: #D0E0FF;
    border: none;
    border-radius: 12px;
    padding: 8px 0;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.2s;
}
.store-btn:active { opacity: 0.7; }

.store-btn-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    line-height: 1.1;
}
.store-btn-text span:first-child {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 18px;
    font-weight: 500; /* Roboto‑Medium */
    color: #21252f;
}
.store-btn-text span:first-child img {
    width: 22px;
    height: 22px;
    object-fit: contain;
}
.store-btn-text span:last-child {
    font-size: 12px;
    color: #464c5a;
    font-weight: 400;
}

/* 正文 */
.content-text {
    font-size: 17px;
    line-height: 1.6;
    color: #333;
    margin: 20px 0;
    font-weight: 400;
}
.content-text p { margin-bottom: 15px; }