:root{
    /* 日落暖色主题 */
    --bg: #0c0a12;                  /* 深紫黑 */
    --bg2: #141024;                 /* 次级深色 */
    --surface: rgba(255,255,255,.07);
    --surface-strong: rgba(255,255,255,.10);

    --text: rgba(255,255,255,.92);
    --muted: rgba(255,255,255,.70);

    --primary: #f59e0b;             /* 琥珀 */
    --primary-2: #fb7185;           /* 玫瑰 */
    --accent: #f97316;              /* 橙 */
    --border: rgba(255,255,255,.14);

    --shadow: 0 10px 30px rgba(0,0,0,.40);
    --shadow-soft: 0 6px 18px rgba(0,0,0,.26);

    --radius: 14px;
    --radius-sm: 10px;
}

body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    background: radial-gradient(1200px 600px at 10% 0%, rgba(34,211,238,.18), transparent 60%),
                radial-gradient(900px 500px at 90% 10%, rgba(167,139,250,.16), transparent 55%),
                linear-gradient(180deg, var(--bg2), var(--bg));
    color: var(--text);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: var(--text);
    opacity: .95;
}
a:hover{ opacity: 1; }

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: linear-gradient(90deg, rgba(34,211,238,.22), rgba(56,189,248,.18));
    color: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(10px);
}

header .logo {
    font-size: 2em;
    font-weight: bold;
    cursor: pointer;
    letter-spacing: .3px;
}

header .search {
    position: relative;
    display: flex;
    align-items: center;
}

header .search input {
    padding: 10px 35px 10px 15px;
    border: 1px solid rgba(255,255,255,.16);
    border-radius: 20px;
    width: 150px;
    background: rgba(255,255,255,.10);
    color: var(--text);
    transition: box-shadow 0.3s ease;
}
header .search input::placeholder{ color: rgba(255,255,255,.55); }

header .search input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(34,211,238,.22);
    border-color: rgba(34,211,238,.45);
}

header .search .icon {
    position: absolute;
    right: 10px;
    font-size: 1.2em;
    color: var(--primary);
    cursor: pointer;
}

main {
    padding: 20px;
    min-height: 100vh;
}

section {
    margin-bottom: 40px;
}

section h2 {
    font-size: 1.8em;
    color: var(--text);
    margin-bottom: 20px;
    text-align: center;
    text-shadow: 0 6px 18px rgba(0,0,0,.25);
}

.coupons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.coupon {
    background: linear-gradient(180deg, var(--surface-strong), var(--surface));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.coupon:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.coupon img {
    width: 100%;
    height: 150px;
    object-fit: contain;
    border-bottom: 1px solid rgba(255,255,255,.06);
    border-top-left-radius: var(--radius);
    border-top-right-radius: var(--radius);
}

.coupon h3 {
    margin: 15px 10px 5px;
    font-size: 1.2em;
    color: var(--text);
}

.coupon p {
    margin: 5px 10px;
    color: var(--muted);
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 1;
}

.faq-item h3 {
    cursor: pointer;
    color: var(--primary-2);
    font-weight: bold;
    transition: color 0.3s ease;
}
.faq-item h3:hover { color: var(--primary); }

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    margin-top: 0;
    padding-left: 0;
    border-left: 3px solid transparent;
    color: var(--muted);
}

.faq-answer.open {
    max-height: 200px;
    margin-top: 10px;
    padding-left: 20px;
    border-left: 3px solid var(--primary);
}

footer {
    text-align: center;
    padding: 15px;
    background: rgba(255,255,255,.06);
    color: #fff;
    font-size: 0.9em;
    border-top: 1px solid var(--border);
}

footer .bro {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}

#back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    background: rgba(34,211,238,.22);
    color: #fff;
    border: 1px solid rgba(34,211,238,.35);
    padding: 12px;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(10px);
    transition: background 0.3s ease, transform 0.3s ease;
}

#back-to-top:hover {
    background: rgba(34,211,238,.32);
    transform: scale(1.1);
}

.popular .coupons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.popular .coupon {
    display: flex;
    align-items: center;
    background: linear-gradient(180deg, rgba(255,255,255,.10), rgba(255,255,255,.06));
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px;
    box-shadow: var(--shadow-soft);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.popular .coupon:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.popular .coupon img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    border-radius: 5px;
    margin-right: 15px;
    flex-shrink: 0;
}

.popular .coupon div {
    flex-grow: 1;
    margin-right: 15px;
}

.popular .coupon div h3 {
    font-size: 1em;
    margin: 0;
    color: var(--text);
}

.popular .coupon div p {
    margin: 0;
    font-size: 0.9em;
    color: var(--muted);
}

.popular .coupon .CouponsNum {
    flex-shrink: 0;
    width: 80px;
    text-align: center;
    font-size: 0.9em;
    color: var(--muted);
    margin: 0;
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.free .coupons {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 15px;
    justify-items: center;
}

.free .coupon {
    background: url(../images/discount-bg-m.png) no-repeat center center / 100% 100%;
    border: 1px solid rgba(255,255,255,.12);
    border-radius: var(--radius-sm);
    padding: 10px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 180px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    max-width: 250px;
}

.free .coupon:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.free .coupon img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    border-radius: 5px;
}

.free .coupon h3 {
    font-size: 1em;
    margin: 0 0 5px;
    color: var(--text);
}

.free .coupon p {
    margin: 0;
    font-size: 0.9em;
    color: var(--muted);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.free .coupon .coupon-info p {
    color: white;
    line-height: 2rem;
    font-size: 26px;
    font-weight: bold;
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 1;
}

.free .coupon .coupon-info span {
    color: white;
    line-height: .75rem;
    font-size: 10px;
}

.more-saving-tips .blogs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.blog-preview {
    background: var(--surface);
    padding: 15px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.blog-preview:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.blog-item {
    margin-bottom: 20px;
    padding: 15px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-soft);
    cursor: pointer;
}

.blog-item h3 {
    margin: 0 0 10px;
    color: var(--primary);
    cursor: pointer;
}

.blog-item p {
    margin: 0;
    color: var(--muted);
}

.pagination {
    display: flex;
    justify-content: center;
    margin-top: 20px;
    gap: 10px;
}

.pagination button {
    padding: 8px 12px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.08);
    color: var(--text);
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.pagination button.active {
    background: rgba(34,211,238,.22);
    color: var(--text);
    border-color: rgba(34,211,238,.45);
}

.pagination button:hover:not(.active) {
    background: rgba(255,255,255,.12);
}

.section-header {
    position: relative;
}

.more-btn {
    display: block;
    margin: 20px;
    padding: 10px 20px;
    background: linear-gradient(90deg, rgba(34,211,238,.28), rgba(167,139,250,.22));
    color: #fff;
    border: 1px solid rgba(255,255,255,.14);
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease;
    position: absolute;
    top: 0;
    right: 20px;
    box-shadow: var(--shadow-soft);
}
.more-btn:hover{
    background: linear-gradient(90deg, rgba(34,211,238,.36), rgba(167,139,250,.28));
}

@media (max-width: 768px) {
    header {
        padding: 10px 15px;
    }

    header .logo {
        font-size: 1.5em;
    }

    header .search input {
        width: 120px;
        padding: 8px 35px 8px 10px;
    }

    header .search .icon {
        font-size: 1em;
    }

    .coupons {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .free .coupons {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .more-btn {
        padding: 5px 10px;
        top: 10px;
        right: 0px;
    }
}

@media (max-width: 480px) {
    header {
        padding: 8px 10px;
    }

    header .logo {
        font-size: 1.2em;
    }

    header .search input {
        width: 80px;
        padding: 6px 35px 6px 8px;
    }

    header .search .icon {
        font-size: 0.9em;
    }

    section h2 {
        font-size: 1.5em;
    }
}