/* 极致手工质感 - 几何切割企业级设计 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary-dark: #1a2332;
    --primary-base: #2c3e50;
    --primary-light: #34495e;
    --accent-gold: #c9a961;
    --accent-bronze: #b8956a;
    --accent-silver: #a8b2bd;
    
    --success: #2d5f5d;
    --danger: #8b3a3a;
    --warning: #8b6914;
    --info: #2d4a5f;
    
    --bg-surface: #ffffff;
    --bg-muted: #f4f6f8;
    --bg-elevated: #fafbfc;
    
    --text-primary: #0d1117;
    --text-secondary: #57606a;
    --text-tertiary: #8b949e;
    --text-inverse: #ffffff;
    
    --border-primary: #d0d7de;
    --border-secondary: #e7ecf0;
    --border-accent: #c9a961;
    
    --shadow-float-sm: 0 2px 8px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-float-md: 0 4px 16px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.08);
    --shadow-float-lg: 0 8px 32px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.1);
    --shadow-emboss: inset 0 1px 0 rgba(255,255,255,0.8), inset 0 -1px 0 rgba(0,0,0,0.05);
    --shadow-deboss: inset 0 2px 4px rgba(0,0,0,0.08);
    --shadow-glow-gold: 0 0 20px rgba(201,169,97,0.15);
    
    --cut-sm: 4px;
    --cut-md: 8px;
    --cut-lg: 12px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(165deg, #f8f9fb 0%, #e8ecf0 50%, #f4f6f8 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.7;
    letter-spacing: -0.015em;
    font-weight: 400;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ========================================
   导航栏 - 斜角切割设计
   ======================================== */
.navbar {
    background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(255,255,255,0.95) 100%);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid transparent;
    border-image: linear-gradient(90deg, transparent 0%, var(--border-accent) 50%, transparent 100%) 1;
    box-shadow: var(--shadow-float-md), inset 0 -1px 0 rgba(201,169,97,0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.25rem;
    padding-bottom: 1.25rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    position: relative;
}

.nav-brand::before {
    content: '';
    position: absolute;
    left: -0.5rem;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 70%;
    background: linear-gradient(180deg, var(--accent-gold), var(--accent-bronze));
    clip-path: polygon(0 0, 100% 20%, 100% 80%, 0 100%);
}

.brand-icon {
    width: 42px;
    height: 42px;
    padding: 0.5rem;
    background: linear-gradient(135deg, var(--primary-base) 0%, var(--primary-light) 100%);
    color: white;
    clip-path: polygon(
        var(--cut-md) 0, 
        100% 0, 
        100% calc(100% - var(--cut-md)), 
        calc(100% - var(--cut-md)) 100%, 
        0 100%, 
        0 var(--cut-md)
    );
    box-shadow: var(--shadow-float-sm), inset 0 1px 0 rgba(255,255,255,0.2), inset 0 -1px 0 rgba(0,0,0,0.2);
    position: relative;
}

.brand-icon::after {
    content: '';
    position: absolute;
    top: 2px;
    right: 2px;
    width: 6px;
    height: 6px;
    background: var(--accent-gold);
    clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.nav-menu {
    display: flex;
    gap: 0.25rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.938rem;
    padding: 0.75rem 1.5rem;
    clip-path: polygon(
        var(--cut-sm) 0, 
        100% 0, 
        100% 100%, 
        0 100%, 
        0 var(--cut-sm)
    );
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    background: transparent;
    letter-spacing: 0.02em;
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(44,62,80,0.04) 0%, rgba(52,73,94,0.06) 100%);
    opacity: 0;
    transition: opacity 0.3s;
    clip-path: inherit;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-bronze));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover::before,
.nav-link.active::before {
    opacity: 1;
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-base);
}

/* ========================================
   Hero区域 - 不对称几何布局
   ======================================== */
.hero-section {
    padding: 6rem 0 5rem;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(201,169,97,0.08) 0%, transparent 70%);
    clip-path: polygon(30% 0%, 100% 0%, 100% 70%, 70% 100%, 0% 100%, 0% 30%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(-30px, 30px) rotate(5deg); }
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -15%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(44,62,80,0.04) 0%, transparent 70%);
    clip-path: polygon(20% 0%, 80% 0%, 100% 20%, 100% 80%, 80% 100%, 20% 100%, 0% 80%, 0% 20%);
    animation: float 25s ease-in-out infinite reverse;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.04em;
    line-height: 1.1;
    position: relative;
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-base) 50%, var(--accent-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 3px;
    background: linear-gradient(90deg, transparent 0%, var(--accent-gold) 50%, transparent 100%);
    clip-path: polygon(10% 0, 90% 0, 100% 100%, 0 100%);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3.5rem;
    font-weight: 400;
    line-height: 1.7;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ========================================
   输入区域 - 斜角切割输入框
   ======================================== */
.card-input-container {
    display: flex;
    gap: 1.25rem;
    max-width: 700px;
    margin: 0 auto 2rem;
    position: relative;
    z-index: 1;
}

.input-wrapper {
    flex: 1;
    position: relative;
}

.input-icon {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    width: 22px;
    height: 22px;
    color: var(--text-tertiary);
    pointer-events: none;
    z-index: 2;
}

.card-input {
    width: 100%;
    padding: 1.125rem 1.25rem 1.125rem 3.5rem;
    background: var(--bg-surface);
    border: 2px solid var(--border-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    clip-path: polygon(
        var(--cut-md) 0, 
        100% 0, 
        100% calc(100% - var(--cut-md)), 
        calc(100% - var(--cut-md)) 100%, 
        0 100%, 
        0 var(--cut-md)
    );
    box-shadow: var(--shadow-deboss), var(--shadow-float-sm);
    position: relative;
}

.card-input::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.8) 50%, transparent 100%);
}

.card-input:hover {
    border-color: var(--border-primary);
    box-shadow: var(--shadow-deboss), var(--shadow-float-md);
    transform: translateY(-1px);
}

.card-input:focus {
    outline: none;
    border-color: var(--accent-gold);
    background: #ffffff;
    box-shadow: 
        0 0 0 4px rgba(201,169,97,0.1),
        var(--shadow-float-lg),
        var(--shadow-glow-gold);
    transform: translateY(-2px);
}

/* ========================================
   按钮 - 金属质感斜角设计
   ======================================== */
.btn-primary,
.btn-secondary,
.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    padding: 1.125rem 2rem;
    border: none;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-base) 0%, var(--primary-light) 100%);
    color: var(--text-inverse);
    clip-path: polygon(
        var(--cut-md) 0, 
        100% 0, 
        100% calc(100% - var(--cut-md)), 
        calc(100% - var(--cut-md)) 100%, 
        0 100%, 
        0 var(--cut-md)
    );
    box-shadow: 
        var(--shadow-float-md),
        var(--shadow-emboss),
        inset -1px -1px 0 rgba(0,0,0,0.2);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: var(--cut-md);
    height: var(--cut-md);
    background: linear-gradient(135deg, var(--accent-gold), transparent);
    clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
    clip-path: inherit;
    opacity: 0;
    transition: opacity 0.3s;
}

.btn-primary:hover::after {
    opacity: 1;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 
        var(--shadow-float-lg),
        var(--shadow-emboss),
        var(--shadow-glow-gold);
}

.btn-primary:active {
    transform: translateY(-1px);
    box-shadow: 
        var(--shadow-float-sm),
        inset 0 2px 4px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 2px solid var(--border-primary);
    clip-path: polygon(
        var(--cut-sm) 0, 
        100% 0, 
        100% calc(100% - var(--cut-sm)), 
        calc(100% - var(--cut-sm)) 100%, 
        0 100%, 
        0 var(--cut-sm)
    );
    box-shadow: var(--shadow-float-sm), var(--shadow-emboss);
}

.btn-secondary:hover {
    border-color: var(--accent-gold);
    color: var(--primary-base);
    transform: translateY(-2px);
    box-shadow: var(--shadow-float-md), var(--shadow-emboss);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-base);
    color: var(--primary-base);
    clip-path: polygon(
        var(--cut-sm) 0, 
        100% 0, 
        100% 100%, 
        0 100%, 
        0 var(--cut-sm)
    );
    position: relative;
    overflow: hidden;
}

.btn-outline::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-base) 0%, var(--primary-light) 100%);
    clip-path: inherit;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-outline:hover::before {
    transform: translateY(0);
}

.btn-outline:hover {
    color: var(--text-inverse);
    border-color: var(--primary-light);
}

.btn-outline span {
    position: relative;
    z-index: 1;
}

.btn-icon {
    width: 18px;
    height: 18px;
}

.btn-copy {
    padding: 0.75rem;
    background: var(--bg-surface);
    border: 2px solid var(--border-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    clip-path: polygon(
        var(--cut-sm) 0, 
        100% 0, 
        100% calc(100% - var(--cut-sm)), 
        calc(100% - var(--cut-sm)) 100%, 
        0 100%, 
        0 var(--cut-sm)
    );
    box-shadow: var(--shadow-float-sm), var(--shadow-emboss);
}

.btn-copy:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
    background: rgba(201,169,97,0.05);
    transform: translateY(-2px);
    box-shadow: var(--shadow-float-md), var(--shadow-glow-gold);
}

.btn-copy:active {
    transform: translateY(0);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.btn-copy svg {
    width: 18px;
    height: 18px;
}

/* ========================================
   错误消息 - 斜角警告框
   ======================================== */
.error-message {
    color: var(--danger);
    padding: 1rem 1.5rem;
    background: rgba(139,58,58,0.08);
    border: 2px solid rgba(139,58,58,0.3);
    border-left: 4px solid var(--danger);
    max-width: 700px;
    margin: 0 auto 1.5rem;
    display: none;
    clip-path: polygon(
        var(--cut-sm) 0, 
        100% 0, 
        100% 100%, 
        0 100%, 
        0 var(--cut-sm)
    );
    font-weight: 500;
}

/* ========================================
   账号卡片 - 多边形切割布局
   ======================================== */
.account-section {
    padding: 3rem 0;
    display: none;
}

.account-card {
    background: var(--bg-surface);
    border: 2px solid var(--border-secondary);
    padding: 0;
    max-width: 1400px;
    margin: 0 auto;
    clip-path: polygon(
        var(--cut-lg) 0, 
        100% 0, 
        100% calc(100% - var(--cut-lg)), 
        calc(100% - var(--cut-lg)) 100%, 
        0 100%, 
        0 var(--cut-lg)
    );
    box-shadow: var(--shadow-float-lg), var(--shadow-emboss);
    position: relative;
    overflow: hidden;
}

.account-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-base) 0%, var(--accent-gold) 50%, var(--primary-light) 100%);
}

.account-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: var(--cut-lg);
    height: var(--cut-lg);
    background: linear-gradient(135deg, var(--accent-gold) 0%, transparent 100%);
    clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.account-header {
    display: grid;
    grid-template-columns: minmax(280px, 300px) 1fr;
    gap: 3rem;
    padding: 2.5rem;
    border-bottom: 2px solid var(--border-secondary);
    position: relative;
}

.account-header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 2.5rem;
    right: 2.5rem;
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, var(--accent-gold) 50%, transparent 100%);
}

.game-image {
    width: 100%;
    height: 210px;
    object-fit: cover;
    clip-path: polygon(
        var(--cut-md) 0, 
        100% 0, 
        100% calc(100% - var(--cut-md)), 
        calc(100% - var(--cut-md)) 100%, 
        0 100%, 
        0 var(--cut-md)
    );
    border: 2px solid var(--border-primary);
    box-shadow: var(--shadow-float-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.game-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(201,169,97,0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.4s;
}

.game-image:hover {
    transform: scale(1.03) translateY(-4px);
    box-shadow: var(--shadow-float-lg), var(--shadow-glow-gold);
}

.game-image:hover::after {
    opacity: 1;
}

.game-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.game-name {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 1.25rem;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    line-height: 1.2;
    position: relative;
    padding-left: 1rem;
}

.game-name::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--accent-gold), var(--accent-bronze));
    clip-path: polygon(0 0, 100% 10%, 100% 90%, 0 100%);
}

.countdown-timer {
    display: inline-flex;
    align-items: center;
    gap: 0.875rem;
    padding: 1rem 1.75rem;
    background: linear-gradient(135deg, rgba(45,95,93,0.08) 0%, rgba(45,95,93,0.12) 100%);
    border: 2px solid var(--success);
    color: var(--success);
    font-weight: 700;
    font-size: 1.063rem;
    clip-path: polygon(
        var(--cut-sm) 0, 
        100% 0, 
        100% calc(100% - var(--cut-sm)), 
        calc(100% - var(--cut-sm)) 100%, 
        0 100%, 
        0 var(--cut-sm)
    );
    box-shadow: var(--shadow-float-sm), var(--shadow-emboss);
    align-self: flex-start;
}

.timer-icon {
    width: 22px;
    height: 22px;
}

.account-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    padding: 2.5rem;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.detail-label {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.label-icon {
    width: 18px;
    height: 18px;
    color: var(--accent-gold);
}

.detail-value {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.125rem 1.5rem;
    background: linear-gradient(135deg, var(--bg-muted) 0%, rgba(255,255,255,0.5) 100%);
    border: 2px solid var(--border-secondary);
    font-weight: 600;
    font-size: 1rem;
    clip-path: polygon(
        var(--cut-sm) 0, 
        100% 0, 
        100% calc(100% - var(--cut-sm)), 
        calc(100% - var(--cut-sm)) 100%, 
        0 100%, 
        0 var(--cut-sm)
    );
    box-shadow: var(--shadow-deboss), var(--shadow-float-sm);
    transition: all 0.25s;
}

.detail-value:hover {
    border-color: var(--border-primary);
    box-shadow: var(--shadow-float-md);
    transform: translateY(-1px);
}

/* ========================================
   验证码区域 - PC端左右布局
   ======================================== */
.verification-section {
    padding: 2.5rem;
    border-top: 2px solid var(--border-secondary);
    position: relative;
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 2.5rem;
    align-items: start;
}

.verification-section::before {
    content: '';
    position: absolute;
    top: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, var(--accent-bronze) 50%, transparent 100%);
    z-index: 1;
    pointer-events: none;
}

.verification-guide,
.verification-content {
    position: relative;
    z-index: 2;
}

/* 引导步骤区域 */
.verification-guide {
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(201,169,97,0.08) 0%, rgba(201,169,97,0.04) 100%);
    border-left: 4px solid var(--accent-gold);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    height: 100%;
}

.guide-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(201,169,97,0.2);
}

.guide-icon {
    width: 20px;
    height: 20px;
    color: var(--accent-gold);
    flex-shrink: 0;
}

.guide-title {
    font-size: 0.938rem;
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.guide-steps {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: 0.5rem;
    background: rgba(255,255,255,0.5);
    border-radius: 6px;
    transition: all 0.3s ease;
}

.step-item:hover {
    background: rgba(255,255,255,0.8);
    transform: translateX(5px);
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-bronze));
    color: white;
    font-weight: 700;
    font-size: 0.875rem;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 2px 6px rgba(201,169,97,0.3);
}

.step-text {
    font-weight: 500;
    line-height: 1.5;
}

/* 验证码内容区域 */
.verification-content {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.verification-header {
    margin-bottom: 1.5rem;
}

.verification-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-secondary);
}

.title-icon {
    width: 24px;
    height: 24px;
    color: var(--primary-base);
}

.verification-code-wrapper {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.verification-code {
    flex: 1;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, rgba(52,152,219,0.05) 0%, rgba(41,128,185,0.02) 100%);
    border: 2px dashed var(--border-primary);
    border-radius: 8px;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.verification-code:hover {
    border-color: var(--primary-base);
    background: linear-gradient(135deg, rgba(52,152,219,0.08) 0%, rgba(41,128,185,0.04) 100%);
}

.code-placeholder {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-tertiary);
    font-size: 0.938rem;
    font-weight: 500;
}

.placeholder-icon {
    width: 24px;
    height: 24px;
    color: var(--text-tertiary);
    opacity: 0.6;
}

/* 按钮组 */
.verification-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn-main {
    width: 100%;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    justify-content: center;
}

.btn-group-secondary {
    display: flex;
    gap: 0.75rem;
}

.btn-small {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    justify-content: center;
}

/* 响应式优化 */
@media (max-width: 1024px) {
    .account-card {
        max-width: 95%;
    }
    
    .account-header {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 2rem;
    }
    
    /* 验证码区域改为竖向布局 */
    .verification-section {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 2rem;
    }
    
    .verification-section::before {
        left: 0;
        right: 0;
    }
    
    .verification-guide {
        height: auto;
    }
}

@media (max-width: 768px) {
    .verification-section {
        padding: 1.5rem;
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .verification-guide {
        height: auto;
    }
    
    .verification-content {
        padding: 1.5rem;
    }
    
    .verification-code {
        padding: 2rem 1rem;
        min-height: 100px;
    }
    
    .btn-group-secondary {
        flex-direction: column;
    }
    
    .step-item {
        font-size: 0.813rem;
    }
    
    .step-number {
        width: 24px;
        height: 24px;
        font-size: 0.75rem;
    }
}

.account-footer {
    display: flex;
    justify-content: center;
    padding: 2rem 2.5rem;
    border-top: 2px solid var(--border-secondary);
}

/* ========================================
   注意事项区域 - 醒目提示卡片
   ======================================== */
.notices-section {
    padding: 4rem 0 2rem;
    background: linear-gradient(180deg, rgba(201, 169, 97, 0.03) 0%, transparent 100%);
}

.notices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.notice-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    background: var(--bg-surface);
    border: 2px solid var(--border-secondary);
    padding: 1.5rem 2rem;
    border-radius: 0.75rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-float-sm);
    position: relative;
    overflow: hidden;
}

.notice-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--accent-gold), var(--accent-bronze));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.notice-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-gold);
    box-shadow: var(--shadow-float-lg), var(--shadow-glow-gold);
}

.notice-card:hover::before {
    opacity: 1;
}

.notice-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-base), var(--primary-light));
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-float-sm);
}

.notice-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--accent-gold);
}

.notice-content {
    flex: 1;
    min-width: 0;
}

.notice-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.35rem;
    letter-spacing: -0.02em;
}

.notice-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.notice-arrow {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-muted);
    transition: all 0.3s ease;
}

.notice-arrow svg {
    width: 18px;
    height: 18px;
    stroke: var(--text-tertiary);
    transition: all 0.3s ease;
}

.notice-card:hover .notice-arrow {
    background: var(--accent-gold);
}

.notice-card:hover .notice-arrow svg {
    stroke: var(--text-inverse);
    transform: translateX(2px);
}

/* ========================================
   教程和游戏区域 - 几何切割卡片
   ======================================== */
.tutorial-section,
.games-section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 4rem;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    position: relative;
    padding-bottom: 1.25rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-base), var(--accent-gold));
    clip-path: polygon(10% 0, 90% 0, 100% 100%, 0 100%);
}

.tutorial-grid,
.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.tutorial-card,
.game-card {
    background: var(--bg-surface);
    border: 2px solid var(--border-secondary);
    padding: 2.5rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    clip-path: polygon(
        var(--cut-md) 0, 
        100% 0, 
        100% calc(100% - var(--cut-md)), 
        calc(100% - var(--cut-md)) 100%, 
        0 100%, 
        0 var(--cut-md)
    );
    box-shadow: var(--shadow-float-md), var(--shadow-emboss);
    position: relative;
}

.tutorial-card::before,
.game-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 60%;
    background: linear-gradient(180deg, var(--accent-gold), transparent);
    clip-path: polygon(0 0, 100% 10%, 100% 100%, 0 90%);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.tutorial-card:hover::before,
.game-card:hover::before {
    transform: scaleY(1);
}

.tutorial-card:hover,
.game-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-float-lg), var(--shadow-glow-gold);
    border-color: var(--accent-gold);
}

.tutorial-icon {
    width: 60px;
    height: 60px;
    padding: 1rem;
    background: linear-gradient(135deg, rgba(44,62,80,0.08), rgba(52,73,94,0.12));
    color: var(--primary-base);
    clip-path: polygon(
        var(--cut-sm) 0, 
        100% 0, 
        100% calc(100% - var(--cut-sm)), 
        calc(100% - var(--cut-sm)) 100%, 
        0 100%, 
        0 var(--cut-sm)
    );
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-float-sm);
}

.tutorial-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.875rem;
    color: var(--text-primary);
}

.tutorial-desc {
    color: var(--text-secondary);
    line-height: 1.7;
}

.game-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    clip-path: polygon(
        var(--cut-sm) 0, 
        100% 0, 
        100% calc(100% - var(--cut-sm)), 
        calc(100% - var(--cut-sm)) 100%, 
        0 100%, 
        0 var(--cut-sm)
    );
    border: 2px solid var(--border-secondary);
    margin-bottom: 1.25rem;
    transition: all 0.3s;
}

.game-card:hover img {
    border-color: var(--accent-gold);
    transform: scale(1.02);
}

/* ========================================
   页脚 - 金属分割线
   ======================================== */
.footer {
    background: linear-gradient(180deg, var(--bg-surface), var(--bg-muted));
    padding: 3rem 0;
    text-align: center;
    border-top: 2px solid var(--border-secondary);
    margin-top: 5rem;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, var(--accent-gold) 50%, transparent 100%);
}

.footer p {
    color: var(--text-secondary);
    margin: 0.375rem 0;
    font-size: 0.938rem;
}

/* ========================================
   Toast提示 - 斜角通知
   ======================================== */
.toast {
    position: fixed;
    bottom: 2.5rem;
    right: 2.5rem;
    background: var(--primary-base);
    color: white;
    padding: 1.125rem 1.75rem;
    clip-path: polygon(
        var(--cut-sm) 0, 
        100% 0, 
        100% calc(100% - var(--cut-sm)), 
        calc(100% - var(--cut-sm)) 100%, 
        0 100%, 
        0 var(--cut-sm)
    );
    font-weight: 500;
    box-shadow: var(--shadow-float-lg);
    z-index: 10000;
    opacity: 0;
    transform: translateY(1rem);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.toast.success {
    background: var(--success);
}

.toast.error {
    background: var(--danger);
}

.toast.warning {
    background: var(--warning);
}

/* ========================================
   历史记录选择界面
   ======================================== */
.history-section {
    min-height: 60vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.history-card {
    background: white;
    border-radius: var(--corner-cut);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    clip-path: polygon(
        0 var(--corner-cut), var(--corner-cut) 0,
        calc(100% - var(--corner-cut)) 0, 100% var(--corner-cut),
        100% calc(100% - var(--corner-cut)), calc(100% - var(--corner-cut)) 100%,
        var(--corner-cut) 100%, 0 calc(100% - var(--corner-cut))
    );
}

.history-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.history-header h2 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.history-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.history-item {
    background: var(--bg-light);
    border: 2px solid var(--border-color);
    border-radius: calc(var(--corner-cut) / 2);
    padding: 1.5rem;
    transition: all 0.3s ease;
    clip-path: polygon(
        0 8px, 8px 0,
        calc(100% - 8px) 0, 100% 8px,
        100% calc(100% - 8px), calc(100% - 8px) 100%,
        8px 100%, 0 calc(100% - 8px)
    );
}

.history-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.history-item.status-available {
    border-color: #10b981;
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
}

.history-item.status-using {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
}

.history-item.status-occupied {
    border-color: #f59e0b;
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
}

.history-item.status-unavailable {
    border-color: #ef4444;
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    opacity: 0.6;
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.account-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.account-username {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.account-status {
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
}

.account-status.status-available {
    background: #10b981;
    color: white;
}

.account-status.status-using {
    background: var(--primary-color);
    color: white;
}

.account-status.status-occupied {
    background: #f59e0b;
    color: white;
}

.account-status.status-unavailable {
    background: #ef4444;
    color: white;
}

.history-time {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.occupied-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.75rem;
    background: rgba(245, 158, 11, 0.1);
    border-left: 3px solid #f59e0b;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: #92400e;
}

.btn-select-account {
    width: 100%;
    padding: 0.875rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    border-radius: calc(var(--corner-cut) / 2);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    clip-path: polygon(
        0 6px, 6px 0,
        calc(100% - 6px) 0, 100% 6px,
        100% calc(100% - 6px), calc(100% - 6px) 100%,
        6px 100%, 0 calc(100% - 6px)
    );
}

.btn-select-account:hover:not(.disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-select-account.disabled {
    background: #9ca3af;
    cursor: not-allowed;
    opacity: 0.5;
}

.history-footer {
    display: flex;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--border-color);
}

.btn-auto-account {
    flex: 1;
    padding: 0.875rem 1.5rem;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border: none;
    border-radius: calc(var(--corner-cut) / 2);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    clip-path: polygon(
        0 6px, 6px 0,
        calc(100% - 6px) 0, 100% 6px,
        100% calc(100% - 6px), calc(100% - 6px) 100%,
        6px 100%, 0 calc(100% - 6px)
    );
}

.btn-auto-account:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-cancel {
    padding: 0.875rem 1.5rem;
    background: white;
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    border-radius: calc(var(--corner-cut) / 2);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    clip-path: polygon(
        0 6px, 6px 0,
        calc(100% - 6px) 0, 100% 6px,
        100% calc(100% - 6px), calc(100% - 6px) 100%,
        6px 100%, 0 calc(100% - 6px)
    );
}

.btn-cancel:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* ========================================
   历史记录选择 - 现代科技风格
   ======================================== */
.history-section {
    padding: 5rem 0;
    background: linear-gradient(165deg, #f8f9fb 0%, #e8ecf0 50%, #f4f6f8 100%);
}

.history-card {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-surface);
    border: 2px solid var(--border-primary);
    padding: 0;
    clip-path: polygon(
        var(--cut-lg) 0,
        100% 0,
        100% calc(100% - var(--cut-lg)),
        calc(100% - var(--cut-lg)) 100%,
        0 100%,
        0 var(--cut-lg)
    );
    box-shadow: var(--shadow-float-lg);
    position: relative;
    overflow: hidden;
}

.history-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 6px;
    height: 100%;
    background: linear-gradient(180deg, var(--accent-gold), var(--accent-bronze));
    clip-path: polygon(0 0, 100% var(--cut-md), 100% 100%, 0 calc(100% - var(--cut-md)));
}

.history-header {
    padding: 3rem;
    background: linear-gradient(135deg, 
        rgba(201,169,97,0.08) 0%,
        rgba(201,169,97,0.02) 100%
    );
    border-bottom: 2px solid var(--border-secondary);
    position: relative;
}

.history-header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 3rem;
    right: 3rem;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-gold) 50%, transparent);
}

.history-header h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.history-header p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.history-list {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.history-item {
    padding: 2rem;
    background: var(--bg-elevated);
    border: 2px solid var(--border-secondary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    clip-path: polygon(
        var(--cut-md) 0,
        100% 0,
        100% calc(100% - var(--cut-md)),
        calc(100% - var(--cut-md)) 100%,
        0 100%,
        0 var(--cut-md)
    );
    position: relative;
}

.history-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--border-secondary);
    transition: all 0.3s;
}

.history-item:hover {
    border-color: var(--accent-gold);
    transform: translateX(4px);
    box-shadow: var(--shadow-float-md), var(--shadow-glow-gold);
}

.history-item:hover::before {
    background: linear-gradient(180deg, var(--accent-gold), var(--accent-bronze));
}

.history-item.status-using::before {
    background: linear-gradient(180deg, var(--accent-gold), var(--accent-bronze));
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.account-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.account-username {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.account-status {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.875rem;
    font-size: 0.813rem;
    font-weight: 600;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.account-status.status-using {
    background: linear-gradient(135deg, rgba(201,169,97,0.15), rgba(201,169,97,0.08));
    color: var(--accent-bronze);
    border: 1px solid var(--accent-gold);
}

.history-time {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.btn-select-account {
    padding: 0.875rem 1.75rem;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-bronze));
    color: var(--text-inverse);
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    clip-path: polygon(
        var(--cut-sm) 0,
        100% 0,
        100% calc(100% - var(--cut-sm)),
        calc(100% - var(--cut-sm)) 100%,
        0 100%,
        0 var(--cut-sm)
    );
    box-shadow: var(--shadow-float-sm);
}

.btn-select-account:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-float-md), var(--shadow-glow-gold);
}

.history-footer {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    padding: 2.5rem 3rem;
    background: var(--bg-muted);
    border-top: 2px solid var(--border-secondary);
}

.btn-auto-account {
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, var(--primary-base), var(--primary-light));
    color: var(--text-inverse);
    border: none;
    font-size: 1.063rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    clip-path: polygon(
        var(--cut-md) 0,
        100% 0,
        100% calc(100% - var(--cut-md)),
        calc(100% - var(--cut-md)) 100%,
        0 100%,
        0 var(--cut-md)
    );
    box-shadow: var(--shadow-float-md);
}

.btn-auto-account:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-float-lg);
}

.btn-cancel {
    padding: 1rem 2rem;
    background: var(--bg-surface);
    color: var(--text-secondary);
    border: 2px solid var(--border-primary);
    font-size: 1.063rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    clip-path: polygon(
        var(--cut-md) 0,
        100% 0,
        100% calc(100% - var(--cut-md)),
        calc(100% - var(--cut-md)) 100%,
        0 100%,
        0 var(--cut-md)
    );
}

.btn-cancel:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

/* ========================================
   延长时长模态框 - 金属质感设计
   ======================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(13, 17, 23, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    padding: 1.5rem;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-container {
    background: var(--bg-surface);
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    clip-path: polygon(
        var(--cut-lg) 0,
        100% 0,
        100% calc(100% - var(--cut-lg)),
        calc(100% - var(--cut-lg)) 100%,
        0 100%,
        0 var(--cut-lg)
    );
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.25),
        var(--shadow-glow-gold);
    animation: modalSlideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-base), var(--accent-gold), var(--primary-light));
}

.modal-container::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: var(--cut-lg);
    height: var(--cut-lg);
    background: linear-gradient(135deg, var(--accent-gold), transparent);
    clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.75rem 2rem;
    border-bottom: 2px solid var(--border-secondary);
    position: relative;
}

.modal-header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 2rem;
    right: 2rem;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-gold), transparent);
}

.modal-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.modal-title .title-icon {
    width: 24px;
    height: 24px;
    color: var(--accent-gold);
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-muted);
    border: 2px solid var(--border-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.25s;
    clip-path: polygon(
        var(--cut-sm) 0,
        100% 0,
        100% calc(100% - var(--cut-sm)),
        calc(100% - var(--cut-sm)) 100%,
        0 100%,
        0 var(--cut-sm)
    );
}

.modal-close:hover {
    background: var(--danger);
    border-color: var(--danger);
    color: white;
    transform: rotate(90deg);
}

.modal-close svg {
    width: 20px;
    height: 20px;
}

.modal-body {
    padding: 2rem;
}

.extend-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.current-card-info,
.current-time-info {
    padding: 1.25rem;
    background: linear-gradient(135deg, var(--bg-muted), rgba(255,255,255,0.5));
    border: 2px solid var(--border-secondary);
    clip-path: polygon(
        var(--cut-sm) 0,
        100% 0,
        100% calc(100% - var(--cut-sm)),
        calc(100% - var(--cut-sm)) 100%,
        0 100%,
        0 var(--cut-sm)
    );
}

.current-time-info {
    border-color: var(--success);
    background: linear-gradient(135deg, rgba(45,95,93,0.08), rgba(45,95,93,0.04));
}

.info-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.info-value {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    word-break: break-all;
}

.info-value.time-value {
    color: var(--success);
    font-size: 1.125rem;
}

.extend-form {
    margin-bottom: 1.5rem;
}

.extend-form .form-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.extend-form .label-icon {
    width: 18px;
    height: 18px;
    color: var(--accent-gold);
}

.extend-form .input-wrapper {
    margin-bottom: 0.75rem;
}

.form-hint {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.813rem;
    color: var(--text-tertiary);
    line-height: 1.5;
    padding: 0.75rem 1rem;
    background: rgba(201,169,97,0.08);
    border-left: 3px solid var(--accent-gold);
    border-radius: 0 4px 4px 0;
}

.form-hint .hint-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    margin-top: 1px;
    color: var(--accent-gold);
}

.extend-error {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: rgba(139,58,58,0.1);
    border: 2px solid rgba(139,58,58,0.3);
    border-left: 4px solid var(--danger);
    color: var(--danger);
    font-weight: 500;
    font-size: 0.875rem;
    margin-top: 1rem;
    clip-path: polygon(
        0 0,
        100% 0,
        100% calc(100% - var(--cut-sm)),
        calc(100% - var(--cut-sm)) 100%,
        0 100%
    );
}

.extend-success {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: rgba(45,95,93,0.1);
    border: 2px solid rgba(45,95,93,0.3);
    border-left: 4px solid var(--success);
    color: var(--success);
    font-weight: 500;
    font-size: 0.875rem;
    margin-top: 1rem;
    clip-path: polygon(
        0 0,
        100% 0,
        100% calc(100% - var(--cut-sm)),
        calc(100% - var(--cut-sm)) 100%,
        0 100%
    );
}

.extend-success .success-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    padding: 1.5rem 2rem;
    background: var(--bg-muted);
    border-top: 2px solid var(--border-secondary);
}

.modal-footer .btn-outline {
    padding: 0.875rem 1.5rem;
}

.modal-footer .btn-primary {
    padding: 0.875rem 1.75rem;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 账号底部按钮区域优化 */
.account-footer {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    padding: 2rem 2.5rem;
    border-top: 2px solid var(--border-secondary);
    flex-wrap: wrap;
}

.account-footer .btn-primary,
.account-footer .btn-outline {
    min-width: 160px;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .card-input-container {
        flex-direction: column;
    }
    
    .account-header {
        grid-template-columns: 1fr;
    }
    
    .game-image {
        width: 100%;
        height: 250px;
    }
    
    .verification-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .verification-actions {
        width: 100%;
        flex-direction: column;
    }
    
    .tutorial-grid,
    .games-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    /* 模态框响应式 */
    .modal-overlay {
        padding: 1rem;
    }
    
    .modal-container {
        max-width: 100%;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 1.25rem 1.5rem;
    }
    
    .extend-info {
        grid-template-columns: 1fr;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .modal-footer .btn-outline,
    .modal-footer .btn-primary {
        width: 100%;
    }
    
    .account-footer {
        flex-direction: column;
        gap: 1rem;
    }
    
    .account-footer .btn-primary,
    .account-footer .btn-outline {
        width: 100%;
    }
}

/* ========================================
   已过期卡密界面 - 几何切割设计
   ======================================== */
.expired-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(139,58,58,0.1) 0%, rgba(139,58,58,0.05) 100%);
    border: 2px solid rgba(139,58,58,0.3);
    color: var(--danger);
    font-weight: 600;
    font-size: 0.875rem;
    letter-spacing: 0.02em;
    margin-bottom: 1.25rem;
    clip-path: polygon(var(--cut-sm) 0, 100% 0, 100% calc(100% - var(--cut-sm)), calc(100% - var(--cut-sm)) 100%, 0 100%, 0 var(--cut-sm));
}

.expired-status-badge svg {
    color: var(--danger);
}

.expired-tip-box {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, rgba(201,169,97,0.08) 0%, rgba(184,149,106,0.05) 100%);
    border: 2px solid rgba(201,169,97,0.25);
    border-left: 4px solid var(--accent-gold);
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    clip-path: polygon(var(--cut-sm) 0, 100% 0, 100% 100%, 0 100%, 0 var(--cut-sm));
}

.expired-tip-box svg {
    color: var(--accent-gold);
    flex-shrink: 0;
}

.expired-cardkey-info {
    background: linear-gradient(135deg, var(--bg-muted) 0%, var(--bg-elevated) 100%);
    border: 2px solid var(--border-secondary);
    padding: 1.5rem;
    margin-top: 1.5rem;
    clip-path: polygon(var(--cut-md) 0, 100% 0, 100% calc(100% - var(--cut-md)), calc(100% - var(--cut-md)) 100%, 0 100%, 0 var(--cut-md));
    box-shadow: var(--shadow-float-sm), var(--shadow-deboss);
}

.expired-cardkey-info .info-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
}

.expired-cardkey-info .info-row:not(:last-child) {
    border-bottom: 1px solid var(--border-secondary);
}

.expired-cardkey-info .info-row svg {
    color: var(--text-tertiary);
    flex-shrink: 0;
}

.expired-cardkey-info .info-label {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    min-width: 50px;
}

.expired-cardkey-info .info-value {
    color: var(--text-primary);
    font-weight: 600;
    flex: 1;
}

.expired-cardkey-info .info-value.monospace {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    letter-spacing: 0.05em;
}

.expired-card-centered .history-header {
    text-align: center;
}

.expired-card-centered .expired-cardkey-info {
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* 延期按钮 - 主要操作 */
.btn-extend-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    padding: 1rem 1.75rem;
    background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-bronze) 100%);
    color: var(--primary-dark);
    border: none;
    font-size: 0.875rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    clip-path: polygon(var(--cut-md) 0, 100% 0, 100% calc(100% - var(--cut-md)), calc(100% - var(--cut-md)) 100%, 0 100%, 0 var(--cut-md));
    box-shadow: var(--shadow-float-md), var(--shadow-emboss), inset -1px -1px 0 rgba(0,0,0,0.15);
    position: relative;
}

.btn-extend-primary::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: var(--cut-md);
    height: var(--cut-md);
    background: linear-gradient(135deg, var(--primary-base), transparent);
    clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.btn-extend-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-float-lg), var(--shadow-emboss), var(--shadow-glow-gold);
}

.btn-extend-primary:active {
    transform: translateY(-1px);
    box-shadow: var(--shadow-float-sm), inset 0 2px 4px rgba(0,0,0,0.15);
}

.btn-extend-primary.large {
    padding: 1.25rem 2.25rem;
    font-size: 1rem;
}

/* 禁用提示按钮 */
.btn-disabled-hint {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    padding: 1rem 1.5rem;
    background: var(--bg-muted);
    color: var(--text-tertiary);
    border: 2px solid var(--border-secondary);
    font-size: 0.813rem;
    font-weight: 500;
    cursor: not-allowed;
    opacity: 0.7;
    clip-path: polygon(var(--cut-sm) 0, 100% 0, 100% calc(100% - var(--cut-sm)), calc(100% - var(--cut-sm)) 100%, 0 100%, 0 var(--cut-sm));
    box-shadow: var(--shadow-deboss);
}

.btn-disabled-hint svg {
    opacity: 0.5;
}

/* 过期状态底部区域 */
.expired-footer {
    gap: 1rem;
}

.expired-footer.centered {
    justify-content: center;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .expired-footer {
        flex-direction: column;
    }
    
    .expired-footer button {
        width: 100%;
    }
    
    .expired-cardkey-info {
        padding: 1rem;
    }
}

/* ========================================
   租用老账号教程 - 高端企业级设计
   ======================================== */

/* 注意事项网格 - 支持4列布局 */
.notices-grid {
    grid-template-columns: repeat(4, 1fr) !important;
}

@media (max-width: 1200px) {
    .notices-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

@media (max-width: 768px) {
    .notices-grid {
        grid-template-columns: 1fr !important;
    }
}

/* 高亮卡片 - 与其他卡片完全一致的布局 */
.notice-card-highlight {
    border-color: var(--accent-gold) !important;
    background: linear-gradient(135deg, 
        rgba(201,169,97,0.04) 0%, 
        var(--bg-surface) 100%) !important;
}

/* 左侧金色装饰条 - 默认显示 */
.notice-card-highlight::before {
    opacity: 1 !important;
    background: linear-gradient(180deg, var(--accent-gold), var(--accent-bronze)) !important;
}

/* 金色图标样式 */
.notice-icon-gold {
    background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-bronze) 100%) !important;
}

.notice-icon-gold svg {
    stroke: var(--primary-dark) !important;
}

/* 箭头旋转动画 */
.notice-card-highlight .notice-arrow {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.notice-card-highlight.expanded .notice-arrow {
    transform: rotate(180deg);
}

/* 悬停效果增强 */
.notice-card-highlight:hover {
    border-color: var(--accent-gold) !important;
    box-shadow: 
        var(--shadow-float-lg), 
        0 0 0 4px rgba(201,169,97,0.08),
        var(--shadow-glow-gold) !important;
}

/* 租用老账号展开教程区域 */
.rent-old-guide {
    margin-top: 1.5rem;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.rent-old-guide .guide-card {
    background: var(--bg-surface);
    border: 2px solid var(--border-secondary);
    padding: 0;
    overflow: hidden;
    clip-path: polygon(var(--cut-md) 0, 100% 0, 100% calc(100% - var(--cut-md)), calc(100% - var(--cut-md)) 100%, 0 100%, 0 var(--cut-md));
    box-shadow: var(--shadow-float-md);
}

.guide-header-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-base) 0%, var(--primary-light) 100%);
    color: var(--text-inverse);
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
}

.guide-header-bar svg {
    flex-shrink: 0;
}

.guide-steps-list {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.guide-step {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.step-marker {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-bronze) 100%);
    color: var(--primary-dark);
    font-weight: 700;
    font-size: 0.875rem;
    clip-path: polygon(var(--cut-sm) 0, 100% 0, 100% calc(100% - var(--cut-sm)), calc(100% - var(--cut-sm)) 100%, 0 100%, 0 var(--cut-sm));
    box-shadow: var(--shadow-float-sm);
}

.step-content {
    flex: 1;
    padding-top: 0.25rem;
}

.step-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
    margin-bottom: 0.375rem;
}

.step-desc {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

.guide-tip {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, rgba(201,169,97,0.08) 0%, rgba(184,149,106,0.05) 100%);
    border-top: 1px solid var(--border-secondary);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.guide-tip svg {
    color: var(--accent-gold);
    flex-shrink: 0;
}

/* 响应式 */
@media (max-width: 768px) {
    .guide-steps-list {
        padding: 1rem;
    }
    
    .guide-header-bar {
        padding: 0.875rem 1rem;
        font-size: 0.875rem;
    }
    
    .guide-tip {
        padding: 0.875rem 1rem;
        font-size: 0.8rem;
    }
    
    .step-marker {
        width: 28px;
        height: 28px;
        font-size: 0.8rem;
    }
}