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

:root{
    --green-dark:#1a6b3c;
    --green-mid:#228b4e;
    --green-light:#2aad62;
    --gold:#f5a623;
    --gold-dark:#d4881c;
    --red:#e63946;
    --red-dark:#c1121f;
    --blue:#4a7ab5;
    --blue-dark:#2c4a6e;
    --bg:#f0f4f0;
    --border:#dde8dd;
    --shadow:0 3px 14px rgba(0,0,0,.08);
    --radius:11px;
}

body{
    font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",sans-serif;
    background:var(--bg);
    color:#1a1a1a;
    min-height:100vh;
    font-size:14px;
    line-height:1.5;
}

/* ===== HEADER ===== */
.header{
    background:linear-gradient(135deg,#0d4a27,var(--green-mid));
    padding:0 16px;
    position:sticky;
    top:0;
    z-index:100;
    box-shadow:0 2px 10px rgba(0,0,0,.3);
}
.header-inner{
    max-width:1200px;
    margin:0 auto;
    display:flex;
    align-items:center;
    justify-content:space-between;
    height:58px;
}
.logo{display:flex;align-items:center;gap:9px;text-decoration:none}
.logo-icon{
    width:36px;height:36px;border-radius:50%;
    background:var(--gold);
    display:flex;align-items:center;justify-content:center;
    font-size:17px;font-weight:900;color:#0d4a27;
    border:2px solid rgba(255,255,255,.3);
}
.logo-img{
    width:44px;height:44px;border-radius:50%;
    object-fit:contain;
    border:2px solid rgba(255,255,255,.25);
    background:#fff;
}
.logo-text{color:#fff;font-size:1rem;font-weight:700;line-height:1.25}
.logo-text span{display:block;font-size:.65rem;font-weight:400;opacity:.72}
.header-btn{
    background:var(--gold);color:#0d4a27;
    font-size:.76rem;font-weight:800;
    padding:6px 14px;border-radius:18px;
    text-decoration:none;transition:.2s;white-space:nowrap;
}
.header-btn:hover{background:#ffd25a;transform:translateY(-1px)}

/* ===== HERO ===== */
.hero{
    background:linear-gradient(160deg,#0d4a27 0%,var(--green-mid) 55%,#c87d10 100%);
    padding:22px 16px 26px;
    text-align:center;
    overflow:hidden;
    position:relative;
}
.hero::before{
    content:'';position:absolute;top:-50px;right:-50px;
    width:200px;height:200px;border-radius:50%;
    background:rgba(255,255,255,.04);
}
.license-strip{
    display:inline-flex;align-items:center;gap:5px;
    background:rgba(255,255,255,.12);
    border:1px solid rgba(255,255,255,.22);
    border-radius:18px;padding:4px 12px;
    font-size:.7rem;color:rgba(255,255,255,.88);
    margin-bottom:12px;
}
.license-strip strong{color:var(--gold)}
.hero h1{
    color:#fff;font-size:1.5rem;font-weight:900;
    margin-bottom:7px;text-shadow:0 2px 6px rgba(0,0,0,.3);
}
.hero p{color:rgba(255,255,255,.8);font-size:.85rem;margin-bottom:16px}
.hero-stats{display:flex;justify-content:center;gap:22px;flex-wrap:wrap}
.h-stat strong{display:block;font-size:1.2rem;font-weight:800;color:var(--gold);text-align:center}
.h-stat span{font-size:.68rem;color:rgba(255,255,255,.75);display:block;text-align:center}

/* ===== NOTICE ===== */
.notice-wrap{max-width:1200px;margin:16px auto 0;padding:0 14px}
.notice-bar{
    background:linear-gradient(90deg,#0d4a27,var(--green-mid));
    border-radius:8px;padding:8px 14px;
    display:flex;align-items:center;gap:8px;
    color:#fff;font-size:.78rem;overflow:hidden;
}
.notice-inner{overflow:hidden;flex:1}
.notice-scroll{
    white-space:nowrap;display:inline-block;
    animation:scrollx 30s linear infinite;
}
@keyframes scrollx{
    0%{transform:translateX(100%)}
    100%{transform:translateX(-100%)}
}

/* ===== MAIN ===== */
.main{max-width:1200px;margin:0 auto;padding:16px 14px 48px}

/* ===== SECTION HEAD ===== */
.sec-head{display:flex;align-items:center;gap:8px;margin:22px 0 11px}
.sec-head h2{font-size:.95rem;font-weight:800;color:var(--green-dark);white-space:nowrap}
.sec-head::after{content:'';flex:1;height:2px;background:linear-gradient(90deg,var(--green-light),transparent)}

/* ===== 统一卡片 ===== */
.platform-card{
    background:#fff;
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    border:1px solid var(--border);
    margin-bottom:16px;
    overflow:hidden;
    position:relative;
    transition:.22s;
}
.platform-card:hover{
    box-shadow:0 6px 22px rgba(0,0,0,.13);
    transform:translateY(-2px);
}
.platform-card.is-top1{border:2px solid var(--gold)}
.platform-card.is-top2{border:2px solid var(--blue)}

/* 顶部彩带 */
.card-ribbon{
    padding:6px 14px;
    display:flex;align-items:center;gap:7px;
    font-size:.8rem;font-weight:800;letter-spacing:.5px;
}
.ribbon-gold{background:linear-gradient(135deg,#b8860b,var(--gold),#f5c518);color:#4a3000}
.ribbon-blue{background:linear-gradient(135deg,var(--blue-dark),var(--blue),#6a9fd8);color:#fff}
.ribbon-green{background:linear-gradient(135deg,var(--green-dark),var(--green-mid));color:#fff}
.ribbon-ad{background:var(--gold);color:#3a2000}
.ribbon-sub{
    margin-left:auto;
    background:rgba(0,0,0,.13);
    font-size:.67rem;font-weight:700;
    padding:2px 8px;border-radius:8px;
}
.ribbon-blue .ribbon-sub,
.ribbon-green .ribbon-sub{background:rgba(255,255,255,.18);color:#fff}

/* 卡片主体 */
.card-inner{display:flex;align-items:stretch}

/* ===== 图片区 (PC端固定尺寸) ===== */
.card-img-wrap{
    flex:0 0 280px;
    padding:12px;
    display:flex;align-items:center;justify-content:center;
}
.card-img-link{
    display:block;
    width:100%;
    height:200px;
    border-radius:8px;
    overflow:hidden;
    border:1px solid #eee;
    transition:.2s;
    background:#111;
}
.card-img-link:hover{opacity:.9;transform:scale(1.01)}
.card-img-link img{
    width:100%;
    height:100%;
    display:block;
    object-fit:contain;
    background:#ffffff;
}

/* ===== 信息区 ===== */
.card-body{
    flex:1;
    padding:14px 10px;
    display:flex;flex-direction:column;
    justify-content:flex-start;
    min-width:0;
}
.card-title{
    font-size:1.15rem;font-weight:800;
    color:var(--green-dark);
    margin-bottom:8px;line-height:1.35;
}
.is-top1 .card-title{color:#0d4a27}
.is-top2 .card-title{color:var(--blue-dark)}

.card-meta{
    display:flex;align-items:center;
    gap:8px;margin-bottom:8px;
    flex-wrap:wrap;font-size:.82rem;color:#666;
}
.card-meta em{font-style:normal;font-weight:700;color:var(--green-mid)}
.is-top2 .card-meta em{color:var(--blue)}
.card-stars{color:#f5c518;font-size:.85rem;letter-spacing:.5px}

.card-desc{
    font-size:.9rem;color:#333;line-height:1.7;
    display:-webkit-box;
    -webkit-line-clamp:4;
    -webkit-box-orient:vertical;
    overflow:hidden;
    margin-bottom:12px;
}

.card-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:auto}
.card-tag{
    background:#f0f7f2;color:var(--green-dark);
    font-size:.68rem;padding:2px 10px;
    border-radius:4px;border:1px solid #ddecde;
}
.is-top2 .card-tag{background:#f0f5fb;color:var(--blue-dark);border-color:#dbe8f6}

/* ===== 按钮区 ===== */
.card-actions{
    flex:0 0 130px;
    display:flex;flex-direction:column;
    align-items:center;justify-content:center;
    gap:12px;padding:16px 12px;
    border-left:1px solid #f0f0f0;
}
.is-top1 .card-actions{
    border-left:1px solid #f5e090;
    background:linear-gradient(180deg,#fffef5,#fff9d6);
}
.is-top2 .card-actions{
    border-left:1px solid #d0e4f5;
    background:linear-gradient(180deg,#f5f9ff,#e8f2fc);
}

.btn{
    font-size:.88rem;font-weight:800;
    padding:12px 0;border-radius:8px;
    text-decoration:none;
    width:100%;text-align:center;display:block;
    transition:.2s;letter-spacing:.3px;
}
.btn:hover{transform:translateY(-1px);filter:brightness(1.08)}

.btn-gold{background:var(--gold);color:#3a2000;box-shadow:0 2px 6px rgba(245,166,35,.2)}
.btn-red{background:var(--red);color:#fff;box-shadow:0 2px 6px rgba(230,57,70,.2)}
.btn-blue{background:var(--blue);color:#fff;box-shadow:0 2px 6px rgba(74,122,181,.2)}
.btn-green{background:var(--green-mid);color:#fff;box-shadow:0 2px 6px rgba(34,139,78,.2)}

/* ===== FOOTER ===== */
.footer{
    background:#0d4a27;
    color:rgba(255,255,255,.6);
    text-align:center;
    padding:30px 16px;
    font-size:.74rem;
    margin-top:20px;
}
.footer-logo{color:#fff;font-size:.95rem;font-weight:700;margin-bottom:8px}
.footer-links{margin:7px 0}
.footer-links a{color:rgba(255,255,255,.45);text-decoration:none;margin:0 8px}
.footer-links a:hover{color:#fff}
.disclaimer{
    max-width:1160px;margin:10px auto 0;
    font-size:.68rem;opacity:.5;line-height:1.65;
}

/* ===== 核心修改：移动端响应式布局 ===== */
@media(max-width:768px){
    .card-inner{flex-direction:column}
    
    .card-img-wrap{
        flex:none;
        padding:12px 12px 0; /* 图片上方和左右间距 */
        width: 100%;
    }
    
    .card-img-link{
        width:100%;
        height:200px;
        border: none;
        background:#111;
        box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    }
    
    .card-img-link img{
        width:100%;
        height:100%;
        object-fit:contain;
        border-radius: 8px;
    }
    
    .card-body{
        padding: 12px 15px;
    }

    .card-actions{
        flex:none;
        flex-direction:row;
        border-left:none!important;
        border-top:1px solid #f0f0f0;
        padding:12px 15px;
        gap:10px;
        background:#fcfdfc!important;
    }
    
    .is-top1 .card-actions{border-top:1px solid #f5e090!important}
    .is-top2 .card-actions{border-top:1px solid #d0e4f5!important}
    
    .btn{flex:1; padding: 11px 0; font-size: 0.85rem;}
    
    .hero h1{font-size:1.25rem}
    .hero-stats{gap:12px}
    .card-desc{-webkit-line-clamp:3}
}

@media(max-width:420px){
    /* 屏幕太窄时按钮变垂直排列 */
    .card-actions{flex-direction:column; gap:8px}
    .btn{width:100%}
}

/* ===== 大屏优化 ===== */
@media(min-width:1024px){
    .card-img-wrap{flex:0 0 300px}
    .main{padding:16px 24px 48px}
    .notice-wrap{padding:0 24px}
    .header-inner{padding:0 10px}
}
@media(min-width:1400px){
    .card-img-wrap{flex:0 0 320px}
}

/* ===== 回到顶部按钮 ===== */
.back-top {
    position: fixed;
    right: 20px;
    bottom: 30px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: linear-gradient(135deg, #0d4a27, var(--green-light));
    color: #fff;
    font-size: 18px;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(0,0,0,.25);
    z-index: 9999; /* 提高层级，确保在最前面 */
    
    /* 改用透明度实现过渡，比 display:none 效果更丝滑 */
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    transform: translateY(20px); /* 初始位置稍微靠下 */
}

/* 当拥有 .show 类时的状态 */
.back-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-top:hover {
    background: linear-gradient(135deg, var(--green-mid), var(--gold));
    transform: translateY(-5px);
    box-shadow: 0 6px 18px rgba(0,0,0,.3);
}