:root {
    --bg-deep: #06080d;
    --bg-card: rgba(14, 18, 28, 0.65);
    --bg-card-solid: #0e121c;
    --bg-elevated: rgba(255,255,255,0.025);
    
    --border-dim: rgba(255,255,255,0.05);
    --border-light: rgba(255,255,255,0.03);
    --border-glow: rgba(0,229,255,0.25);
    
    /* 品牌主色：科技青 */
    --jade: #00E5FF;
    --jade-dim: rgba(0,229,255,0.1);
    
    /* 强调色：推荐/热销金 */
    --gold: #FFD700;
    --gold-dim: rgba(255,215,0,0.1);
    
    /* 文字色系 */
    --text-primary: #f0f2f5;
    --text-secondary: #8b95a8;
    --text-light: #4a5568;
    
    /* 状态色 */
    --success: #07c160;
    --danger: #ff4d4f;
    --danger-dim: rgba(255, 77, 79, 0.1);

    /* 字体复用 */
    --font-cn: "PingFang SC","Microsoft YaHei",sans-serif;
    --font-mono: "SF Mono","Fira Code","Consolas",monospace;
}

body { 
    background: var(--bg-deep); 
    color: var(--text-primary); 
    font-family: var(--font-cn); 
    margin: 0;
    -webkit-font-smoothing: antialiased;
    /* 注入全局网格背景 */
    background-image:
        radial-gradient(ellipse at 50% 0%,rgba(0,229,255,0.06) 0%,transparent 60%),
        linear-gradient(var(--border-dim) 1px,transparent 1px),
        linear-gradient(90deg,var(--border-dim) 1px,transparent 1px);
    background-size:100% 100%,48px 48px,48px 48px;
    background-attachment:fixed;
    min-height: 100vh;
}

/* 布局容器 */
.vip-layout { 
    max-width: 1100px; 
    margin: 0 auto; 
    padding: 30px 16px 120px; 
    display: grid; 
    grid-template-columns: 1fr 360px; 
    gap: 24px; 
    align-items: start; 
}
#vipForm { display: contents; }

/* 页头 */
.page-header { margin-bottom: 24px; }
.page-header h1 { 
    font-size: 24px; 
    font-weight: 800; 
    margin: 0 0 8px; 
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--jade) 0%, var(--gold) 100%); 
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent; 
}
.terminal-status {
    font-size: 12px; 
    color: var(--jade); 
    font-family: var(--font-mono);
    letter-spacing: 1px;
    opacity: 0.9; 
}
.terminal-status::before { 
    content: '● '; 
    color: var(--jade);
    box-shadow: 0 0 8px var(--jade);
    animation: blink 2s infinite;
}
@keyframes blink{0%,100%{opacity:1;}50%{opacity:.3;}}

/* 步骤条 */
.stepper { display: flex; gap: 12px; margin-bottom: 32px; }
.step-node { display: flex; align-items: center; gap: 10px; flex: 1; }
.step-icon { 
    width: 28px; height: 28px; 
    border-radius: 50%; 
    background: var(--bg-card-solid); 
    border: 1px solid var(--border-dim); 
    display: flex; align-items: center; justify-content: center; 
    font-size: 12px; font-weight: 600;
    font-family: var(--font-mono);
    color: var(--text-secondary); 
    flex-shrink: 0; 
    transition: all 0.3s ease;
}
.step-node.active .step-icon { 
    border-color: var(--jade); 
    background: var(--jade-dim);
    color: var(--jade); 
    box-shadow: 0 0 12px var(--jade-dim); 
}
.step-text { font-size: 14px; color: var(--text-secondary); line-height: 1.3; font-weight: 500; }
.step-node.active .step-text { color: var(--text-primary); }
.step-text small { display: block; font-size: 11px; color: var(--text-light); margin-top: 2px; font-family: var(--font-mono); }

/* 配置面板 */
.config-panel { display: flex; flex-direction: column; gap: 24px; }
.module-box { 
    background: var(--bg-card); 
    border: 1px solid var(--border-dim); 
    border-radius: 16px; 
    padding: 24px; 
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: relative;
    overflow: hidden;
}
/* 模块左上角科技装饰线 */
.module-box::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 40px; height: 2px;
    background: linear-gradient(90deg, var(--jade), transparent);
}
.module-title { 
    font-size: 15px; 
    font-weight: 700; 
    color: var(--text-primary); 
    margin-bottom: 20px; 
    display: flex; 
    align-items: center; 
    gap: 10px; 
}
.module-title::before { 

    content: '//'; 
    font-family: var(--font-mono);
    color: var(--jade);
    font-weight: 400;
    font-size: 14px;
}

/* 套餐网格 */
.plan-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.plan-card { 
    position: relative; 
    background: var(--bg-elevated); 
    border: 1px solid var(--border-dim); 
    border-radius: 12px; 
    padding: 18px; 
    cursor: pointer; 
    transition: all 0.25s ease; 
    overflow: hidden; 
}
.plan-card:hover { border-color: rgba(255,255,255,0.15); background: rgba(255,255,255,0.04); }
.plan-card.selected { 
    border-color: var(--jade); 
    background: var(--jade-dim); 
    box-shadow: 0 0 20px rgba(0,229,255,0.08);
}
.plan-card.selected::after { 
    content: '✓'; 
    position: absolute; top: 8px; right: 10px; 
    color: #000; 
    background: var(--jade);
    width: 18px; height: 18px;
    border-radius: 50%;
    font-size: 11px; 
    display: flex; align-items: center; justify-content: center;
    font-weight: bold; 
}
.plan-name { font-size: 15px; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.plan-desc { font-size: 12px; color: var(--text-secondary); line-height: 1.5; min-height: 36px; }
.plan-base-price { font-size: 16px; color: var(--jade); margin-top: 12px; font-weight: 800; font-family: var(--font-mono); }
.plan-card:last-child .plan-base-price { color: var(--gold); }

/* 周期选择 */
.cycle-track { display: flex; flex-wrap: wrap; gap: 10px; padding-bottom: 4px; min-height: 46px; }
.cycle-btn { 
    flex: 0 0 calc((100% - 60px) / 7); 
    padding: 10px 8px; 
    background: var(--bg-elevated); 
    border: 1px solid var(--border-dim); 
    color: var(--text-secondary); 
    font-size: 13px; 
    font-weight: 600; 
    text-align: center; 
    cursor: pointer; 
    transition: all 0.2s; 
    /* 注入科技风切角 */
    clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
    user-select: none; 
    -webkit-tap-highlight-color: transparent; 
    box-sizing: border-box; 
    font-family: var(--font-mono);
}
.cycle-btn:hover { border-color: rgba(255,255,255,0.15); color: var(--text-primary); background: rgba(255,255,255,0.04); }
.cycle-btn.active { 
    background: var(--jade-dim); 
    border-color: var(--jade); 
    color: var(--jade); 
    box-shadow: 0 0 12px rgba(0,229,255,0.1);
}
.cycle-btn.hot { border-color: rgba(255,215,0,0.2); background: rgba(255,215,0,0.03); color: var(--gold); }
.cycle-btn.hot.active { 
    background: var(--gold-dim); 
    border-color: var(--gold); 
    color: var(--gold); 
    box-shadow: 0 0 12px rgba(255,215,0,0.15);
}

/* 信息网格 */
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 20px; }
.info-item h4 { font-size: 13px; color: var(--jade); margin: 0 0 6px; font-weight: 600; font-family: var(--font-mono); letter-spacing: 0.5px; }
.info-item p { font-size: 12px; color: var(--text-secondary); line-height: 1.6; margin: 0; }

/* 结算侧边栏 (Checkout Pod) */
.checkout-pod { 
    position: sticky; top: 20px; 
    background: var(--bg-card); 
    border: 1px solid var(--border-dim); 
    border-radius: 16px; 
    padding: 24px; 
    display: flex; 
    flex-direction: column; 
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
.pod-header { 
    font-size: 15px; font-weight: 700; color: var(--text-primary); 
    margin-bottom: 20px; padding-bottom: 16px; 
    border-bottom: 1px dashed var(--border-dim); 
    display: flex; align-items: center; gap: 10px; 
}
.pod-header::before { 
    content: ''; width: 8px; height: 8px; 
    background: var(--success); border-radius: 50%; 
    box-shadow: 0 0 8px var(--success); 
    animation: pulse 2s infinite; 
}
@keyframes pulse { 50% { box-shadow: 0 0 0 4px rgba(7, 193, 96, 0); } }

.pod-details { flex: 1; display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; font-size: 13px; }
.pod-row { display: flex; justify-content: space-between; color: var(--text-secondary); }
.pod-row .val { color: var(--text-primary); font-weight: 600; font-family: var(--font-mono); }
.pod-row.discount .val { color: var(--gold); }

.pod-total { 
    background: var(--bg-elevated); 
    border: 1px solid var(--border-dim);
    border-radius: 12px; 
    padding: 16px; 
    margin-bottom: 20px; 
    text-align: center; 
}
.total-label { font-size: 12px; color: var(--text-secondary); margin-bottom: 8px; letter-spacing: 1px; font-family: var(--font-mono); }
.total-price { font-size: 36px; font-weight: 800; color: var(--text-primary); letter-spacing: -1px; font-family: var(--font-mono); }
.total-price .currency { font-size: 18px; font-weight: 600; margin-right: 4px; color: var(--jade); }
.total-orig { font-size: 12px; color: var(--text-light); text-decoration: line-through; margin-top: 4px; }

/* 提交按钮 - 科技风切角 + 扫描光效 */
.btn-execute { 
    position: relative;
    width: 100%; padding: 14px; 
    font-size: 15px; font-weight: 700; letter-spacing: 1px; 
    color: #000; 
    background: var(--jade); 
    border: none; cursor: pointer; 
    /* 科技风切角 */
    clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
    transition: all 0.3s; 
    display: flex; align-items: center; justify-content: center; gap: 8px;
    overflow: hidden;
    font-family: var(--font-cn);
}
/* 扫描光效 */
.btn-execute::before {
    content: '';
    position: absolute; top: 0; left: -100%; width: 50%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: radarScan 3s linear infinite;
}
@keyframes radarScan { 0% { left: -50%; } 100% { left: 150%; } }

.btn-execute:hover { background: #33ebff; box-shadow: 0 0 24px rgba(0,229,255,0.4); }
.btn-execute:active { transform: scale(0.98); }
.btn-execute:disabled { 
    background: #2a2f3d !important; 
    color: #5a6275 !important; 
    cursor: not-allowed; 
    transform: none !important; 
    box-shadow: none !important;
    clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}
.btn-execute:disabled::before { display: none; } /* 禁用时关闭光效 */

.btn-execute.loading {
    background: var(--jade) !important;
    color: #000 !important;
    box-shadow: 0 0 16px rgba(0,229,255,0.2) !important;
    opacity: 0.85;
    pointer-events: none;
}

.empty-msg { color: var(--danger); text-align: center; padding: 20px; font-size: 14px; }

/* 错误提示终端 */
.error-terminal { 
    max-width: 600px; margin: 80px auto; padding: 40px; 
    background: var(--bg-card-solid); 
    border: 1px solid var(--border-dim); 
    border-radius: 16px; text-align: center; 
    box-shadow: 0 10px 40px rgba(0,0,0,0.5); 
}
.error-terminal h2 { color: var(--danger); font-size: 20px; margin: 0 0 16px; font-weight: 700; }
.error-terminal p { color: var(--text-secondary); font-size: 14px; line-height: 1.6; margin: 0 0 24px; }
.error-terminal .error-code { 
    font-family: var(--font-mono); color: var(--text-primary); 
    background: var(--bg-elevated); padding: 8px 16px; 
    border-radius: 6px; display: inline-block; margin-bottom: 24px; 
    border: 1px solid var(--border-dim); 
}
.error-terminal a { 
    color: var(--jade); text-decoration: none; font-size: 14px; 
    font-weight: 600; border-bottom: 1px dashed var(--jade); padding-bottom: 2px; 
}
.error-terminal a:hover { color: #33ebff; border-color: #33ebff; }

/* =========================================
   移动端响应式适配
   ========================================= */
@media (max-width: 860px) {
    .vip-layout { grid-template-columns: 1fr; padding: 16px 12px 100px; gap: 16px; }
    .stepper { gap: 8px; } 
    .step-text small { display: none; }
    .plan-grid { grid-template-columns: 1fr; gap: 10px; }
    .info-grid { grid-template-columns: 1fr; gap: 12px; }
    .cycle-track { gap: 8px; }
    .cycle-btn { flex: 0 0 calc((100% - 16px) / 3); padding: 10px 4px; font-size: 12px; }
    
    /* 移动端底部吸底结算栏 */
    .checkout-pod { 
        position: fixed; bottom: 0; left: 0; right: 0; top: auto; 
        border-radius: 16px 16px 0 0; 
        border: 1px solid var(--border-dim); border-bottom: none; 
        padding: 12px 16px; 
        padding-bottom: calc(12px + env(safe-area-inset-bottom));
        flex-direction: row; align-items: center; gap: 16px; 
        box-shadow: 0 -4px 20px rgba(0,0,0,0.5); 
        z-index: 100; 
        backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
        background: rgba(14, 18, 28, 0.85); 
    }
    .pod-header, .pod-details { display: none; }
    .pod-total { flex: 1; background: transparent; border: none; padding: 0; margin: 0; text-align: left; }
    .total-label { display: none; } 
    .total-price { font-size: 24px; }
    .total-orig { font-size: 11px; margin-top: 0; display: inline-block; margin-left: 8px; }
    .btn-execute { width: auto; padding: 12px 28px; font-size: 14px; clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px); }
    .error-terminal { margin: 40px 16px; padding: 24px; }
}

/* =========================================
   ★ 激活协议承诺弹窗 (Protocol Modal)
   ========================================= */
.protocol-overlay {
    position: fixed; inset: 0; z-index: 9999;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center;
    padding: 20px;
    opacity: 1; 
    transition: opacity 0.3s ease, visibility 0.3s ease; 
}
.protocol-overlay.hidden {
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    z-index: -1;
}

.protocol-box {
    width: 100%; max-width: 520px;
    background: var(--bg-card-solid);
    border: 1px solid var(--border-glow);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 40px rgba(0,229,255,0.05);
    padding: 28px;
    transform: translateY(0); 
    transition: transform 0.3s ease;
}
.protocol-overlay.hidden .protocol-box {
    transform: translateY(20px);
}

.proto-header {
    display: flex; align-items: center; gap: 12px;
    margin-bottom: 20px; padding-bottom: 16px;
    border-bottom: 1px solid var(--border-dim);
}
.proto-icon {
    width: 40px; height: 40px; flex-shrink: 0;
    background: var(--jade-dim); 
    border-radius: 50%; 
    display: flex; align-items: center; justify-content: center;
    color: var(--jade); font-size: 20px;
    border: 1px solid rgba(0,229,255,0.2);
}
.proto-title { font-size: 16px; font-weight: 700; color: var(--text-primary); }
.proto-title small { display: block; font-size: 11px; color: var(--text-secondary); font-weight: 400; margin-top: 4px; font-family: var(--font-mono); }

.proto-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; }
.proto-item {
    display: flex; gap: 12px; align-items: flex-start;
    padding: 14px; 
    background: var(--bg-elevated);
    border-radius: 10px;
    border-left: 3px solid var(--jade);
}
.proto-item.warn { border-left-color: var(--danger); background: var(--danger-dim); }
.proto-num {
    font-family: var(--font-mono); font-size: 11px; font-weight: 700;
    color: var(--jade); background: var(--jade-dim);
    padding: 2px 6px; border-radius: 4px; flex-shrink: 0; margin-top: 2px;
}
.proto-item.warn .proto-num { color: var(--danger); background: var(--danger-dim); }
.proto-text { font-size: 13px; color: var(--text-primary); line-height: 1.6; }
.proto-text strong { color: var(--text-primary); font-weight: 700; }
.proto-text .hl-jade { color: var(--jade); font-weight: 600; }
.proto-text .hl-red { color: var(--danger); font-weight: 600; }

.proto-check {
    display: flex; align-items: center; gap: 10px;
    margin-bottom: 20px; cursor: pointer; user-select: none;
    -webkit-tap-highlight-color: transparent;
}
.proto-check input { display: none; }
.check-box {
    width: 20px; height: 20px; flex-shrink: 0;
    border: 1.5px solid var(--text-secondary); border-radius: 5px;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.2s; color: transparent; font-size: 12px;
    background: transparent;
}
.proto-check input:checked + .check-box {
    background: var(--jade); border-color: var(--jade); color: #000;
    box-shadow: 0 0 8px var(--jade-dim);
}
.check-label { font-size: 13px; color: var(--text-secondary); }
.proto-check input:checked ~ .check-label { color: var(--text-primary); font-weight: 500; }

.btn-commit {
    position: relative;
    width: 100%; padding: 14px; font-size: 15px; font-weight: 700;
    letter-spacing: 1px; color: #000; 
    background: var(--jade);
    border: none; cursor: pointer;
    clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
    transition: all 0.3s; 
    display: flex; align-items: center; justify-content: center; gap: 8px;
    overflow: hidden;
}
.btn-commit::before {
    content: '';
    position: absolute; top: 0; left: -100%; width: 50%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: radarScan 3s linear infinite;
}
.btn-commit:hover:not(:disabled) { background: #33ebff; box-shadow: 0 0 24px rgba(0,229,255,0.4); }
.btn-commit:active:not(:disabled) { transform: scale(0.98); }
.btn-commit:disabled { background: #2a2f3d; color: #5a6275; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-commit:disabled::before { display: none; }

@media (max-width: 600px) {
    .protocol-box { padding: 20px 16px; border-radius: 12px; }
    .proto-title { font-size: 15px; }
    .proto-item { padding: 12px; gap: 10px; }
    .proto-text { font-size: 12px; }
}
.btn-text .sep::before {
    content: "\00B7"; 
    margin: 0 8px;
	color: rgba(0, 0, 0, 0.5);
    font-weight: 400;
    opacity: 0.8;
}