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

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
    background: #ffffff;
    color: #333;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ===== 顶部 ===== */
.header {
    text-align: center;
    padding: 32px 20px 24px;
    border-bottom: 1px solid #f0f0f0;
}

.header h1 {
    font-size: 22px;
    font-weight: 700;
    color: #111;
    margin-bottom: 6px;
    letter-spacing: -0.5px;
}

.header p {
    font-size: 13px;
    color: #999;
}

/* ===== 分类导航 ===== */
.categories {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    overflow-x: auto;
    padding: 14px 16px;
    gap: 8px;
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid #f5f5f5;
}

.categories::-webkit-scrollbar {
    display: none;
}

.cat-btn {
    flex-shrink: 0;
    padding: 7px 18px;
    border: 1px solid #e8e8e8;
    border-radius: 20px;
    background: #fff;
    color: #666;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}

.cat-btn.active {
    background: #111;
    color: #fff;
    border-color: #111;
}

/* ===== 列表 ===== */
.coupon-list {
    padding: 16px;
    display: grid;
    gap: 12px;
    max-width: 640px;
    margin: 0 auto;
}

/* ===== 卡片 ===== */
.coupon-card {
    background: #fff;
    border: 1px solid #eee;
    border-radius: 12px;
    overflow: hidden;
    transition: border-color 0.2s;
}

.coupon-card:hover {
    border-color: #ddd;
}

/* 顶部横条 */
.coupon-top {
    background: #fff;
    border-bottom: 1px solid #f5f5f5;
    padding: 14px 18px;
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.coupon-top .discount {
    font-size: 22px;
    font-weight: 700;
    color: #e53935;
    letter-spacing: -0.5px;
}

.coupon-top .condition {
    font-size: 12px;
    color: #999;
}

/* 卡片主体 */
.coupon-body {
    padding: 16px 18px;
}

.coupon-body h3 {
    font-size: 15px;
    font-weight: 600;
    color: #222;
    margin-bottom: 10px;
    line-height: 1.5;
}

.coupon-body .platform {
    display: inline-block;
    background: #f7f7f7;
    color: #888;
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 4px;
    margin-bottom: 12px;
}

/* 链接 */
.link-row {
    margin-bottom: 14px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.link-label {
    color: #bbb;
    white-space: nowrap;
}

.link-url {
    color: #555;
    text-decoration: none;
    border-bottom: 1px solid #ddd;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 12px;
}

/* 按钮 */
.copy-btn {
    width: 100%;
    padding: 13px;
    background: #111;
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.copy-btn:active {
    background: #333;
}

.copy-btn.copied {
    background: #52c41a;
}

/* 底部 */
.footer {
    text-align: center;
    padding: 28px 16px;
    color: #ccc;
    font-size: 12px;
}