/* ========================================
 * Shadow Theme - 暗影降临
 * 纯黑+暗红+暗紫，暗黑传奇风，冷峻锐利
 * ======================================== */

/* --- CSS 变量 --- */
:root {
    --color-blood: #8b0000;
    --color-blood-light: #b22222;
    --color-blood-dark: #5c0000;
    --color-purple: #4a0080;
    --color-purple-light: #6a0dad;
    --color-silver: #c0c0c0;
    --color-silver-light: #e0e0e0;
    --color-silver-dark: #808080;
    --color-bg-black: #0a0a0a;
    --color-bg-darker: #050505;
    --color-bg-section: #111111;
    --color-bg-card: rgba(20, 10, 15, 0.9);
    --color-text: #d0d0d0;
    --color-text-light: #e8e8e8;
    --color-text-muted: #666666;
    --color-border: #2a2a2a;
    --color-border-blood: #8b0000;
    --sidebar-width: 280px;
    --font-family: "Microsoft YaHei", "SimHei", "PingFang SC", "Heiti SC", sans-serif;
}

/* --- Reset --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg-black);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

a {
    color: var(--color-silver);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: #fff;
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* --- 背景层 --- */
.bg-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center top;
    background-repeat: no-repeat;
    background-attachment: fixed;
    opacity: 0.2;
    z-index: 0;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 80% 20%, rgba(139, 0, 0, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 20% 80%, rgba(74, 0, 128, 0.15) 0%, transparent 50%),
        linear-gradient(180deg, var(--color-bg-black) 0%, var(--color-bg-darker) 100%);
    z-index: 0;
}

/* --- 血月层 --- */
.blood-moon-layer {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.blood-moon {
    position: absolute;
    top: 10%;
    right: 15%;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 35%, #b22222 0%, #8b0000 40%, #5c0000 70%, #3d0000 100%);
    box-shadow:
        0 0 60px rgba(139, 0, 0, 0.5),
        0 0 120px rgba(139, 0, 0, 0.3),
        inset -10px -10px 30px rgba(0, 0, 0, 0.5);
    animation: bloodMoonPulse 6s ease-in-out infinite;
}

@keyframes bloodMoonPulse {
    0%, 100% {
        box-shadow:
            0 0 60px rgba(139, 0, 0, 0.5),
            0 0 120px rgba(139, 0, 0, 0.3),
            inset -10px -10px 30px rgba(0, 0, 0, 0.5);
    }
    50% {
        box-shadow:
            0 0 80px rgba(178, 34, 34, 0.6),
            0 0 160px rgba(139, 0, 0, 0.4),
            inset -10px -10px 30px rgba(0, 0, 0, 0.5);
    }
}

/* --- 暗影飘带 --- */
.shadow-ribbons {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.ribbon {
    position: absolute;
    width: 200px;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(139, 0, 0, 0.4), transparent);
    filter: blur(1px);
}

.ribbon-1 {
    top: 20%;
    left: -200px;
    animation: ribbonFloat1 15s linear infinite;
    transform: rotate(-15deg);
}

.ribbon-2 {
    top: 50%;
    left: -200px;
    animation: ribbonFloat2 20s linear infinite;
    animation-delay: 3s;
    transform: rotate(8deg);
}

.ribbon-3 {
    top: 75%;
    left: -200px;
    animation: ribbonFloat3 18s linear infinite;
    animation-delay: 7s;
    transform: rotate(-5deg);
}

@keyframes ribbonFloat1 {
    0% { left: -200px; top: 20%; opacity: 0; }
    10% { opacity: 0.6; }
    90% { opacity: 0.4; }
    100% { left: 110%; top: 15%; opacity: 0; }
}

@keyframes ribbonFloat2 {
    0% { left: -200px; top: 50%; opacity: 0; }
    10% { opacity: 0.5; }
    90% { opacity: 0.3; }
    100% { left: 110%; top: 55%; opacity: 0; }
}

@keyframes ribbonFloat3 {
    0% { left: -200px; top: 75%; opacity: 0; }
    10% { opacity: 0.4; }
    90% { opacity: 0.2; }
    100% { left: 110%; top: 70%; opacity: 0; }
}

/* --- 左侧导航栏 --- */
.side-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(180deg, #0d0d0d 0%, #080808 50%, #050505 100%);
    border-right: 1px solid var(--color-border);
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.side-nav-edge {
    position: absolute;
    top: 0;
    right: -1px;
    width: 1px;
    height: 100%;
    background: linear-gradient(180deg, transparent, var(--color-blood) 20%, var(--color-purple) 80%, transparent);
}

.side-nav-inner {
    padding: 40px 30px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.side-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.side-logo img {
    height: 44px;
    width: auto;
}

.side-logo-text {
    font-size: 22px;
    font-weight: 900;
    color: var(--color-silver-light);
    letter-spacing: 2px;
}

.war-badge {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 900;
    color: #fff;
    background: linear-gradient(135deg, var(--color-blood-light), var(--color-blood-dark));
    border: 2px solid var(--color-blood);
    position: relative;
    flex-shrink: 0;
    box-shadow: 0 0 12px rgba(139, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    letter-spacing: 0;
    font-family: "Microsoft YaHei", "SimHei", sans-serif;
}

.war-badge::before,
.war-badge::after {
    content: '';
    position: absolute;
    background: var(--color-blood);
}

.war-badge::before {
    top: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 4px;
}

.war-badge::after {
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 4px;
}

.side-version {
    font-size: 11px;
    color: var(--color-text-muted);
    letter-spacing: 2px;
    padding-left: 1px;
    margin-bottom: 40px;
}

.side-menu {
    flex: 1;
}

.side-menu ul {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.side-nav-link {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 14px 18px;
    color: var(--color-text-muted);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 2px;
    position: relative;
    border-left: 2px solid transparent;
    transition: all 0.3s ease;
    clip-path: polygon(0 0, 100% 0, 95% 100%, 0 100%);
}

.side-nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, rgba(139, 0, 0, 0.2), transparent);
    transition: width 0.3s ease;
}

.side-nav-link:hover,
.side-nav-link.active {
    color: var(--color-silver-light);
    border-left-color: var(--color-blood);
    background: linear-gradient(90deg, rgba(139, 0, 0, 0.15), transparent);
}

.side-nav-link:hover::before,
.side-nav-link.active::before {
    width: 100%;
}

.nav-num {
    font-size: 11px;
    color: var(--color-blood);
    font-weight: 700;
    font-family: 'Courier New', monospace;
    min-width: 24px;
    letter-spacing: 1px;
}

.nav-name {
    flex: 1;
}

.nav-arrow {
    width: 0;
    height: 0;
    border-top: 4px solid transparent;
    border-bottom: 4px solid transparent;
    border-left: 5px solid currentColor;
    opacity: 0;
    transform: translateX(-5px);
    transition: all 0.3s ease;
}

.side-nav-link:hover .nav-arrow,
.side-nav-link.active .nav-arrow {
    opacity: 1;
    transform: translateX(0);
}

.side-server {
    margin-top: 30px;
    padding: 15px;
    background: rgba(139, 0, 0, 0.1);
    border: 1px solid var(--color-border);
    border-left: 2px solid var(--color-blood);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.server-label {
    font-size: 11px;
    color: var(--color-text-muted);
    letter-spacing: 2px;
}

.server-value {
    font-size: 14px;
    color: var(--color-silver);
    font-weight: 600;
}

.side-download {
    margin-top: 20px;
}

/* --- 主内容区 --- */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

/* --- 通用 Section --- */
section {
    position: relative;
    padding: 80px 60px;
    z-index: 1;
}

.section-header {
    text-align: left;
    margin-bottom: 50px;
    padding-left: 20px;
    position: relative;
}

.section-header::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 3px;
    height: 30px;
    background: linear-gradient(180deg, var(--color-blood), var(--color-purple));
}

.section-title {
    font-size: 32px;
    font-weight: 900;
    color: var(--color-silver-light);
    display: inline-flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 8px;
    letter-spacing: 4px;
    text-shadow: 0 0 20px rgba(192, 192, 192, 0.2);
}

.section-subtitle {
    font-size: 12px;
    color: var(--color-text-muted);
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-left: 2px;
}

.diamond-decor {
    width: 8px;
    height: 8px;
    background: var(--color-blood);
    transform: rotate(45deg);
    box-shadow: 0 0 8px rgba(139, 0, 0, 0.6);
}

/* --- 按钮 --- */
.btn-blood {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, #8b0000 0%, #6b0000 50%, #4a0000 100%);
    border: 1px solid var(--color-blood-light);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    letter-spacing: 3px;
    clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.btn-blood::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    transition: left 0.5s ease;
}

.btn-blood:hover {
    background: linear-gradient(135deg, #a52a2a 0%, #8b0000 50%, #6b0000 100%);
    border-color: #cd5c5c;
    box-shadow: 0 0 20px rgba(139, 0, 0, 0.5);
    transform: translateY(-2px);
    color: #fff;
}

.btn-blood:hover::before {
    left: 100%;
}

.btn-blood.btn-large {
    padding: 16px 44px;
    font-size: 17px;
}

.btn-blood.btn-small {
    padding: 8px 20px;
    font-size: 13px;
}

/* 战字徽章图标 */
.btn-war-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    font-size: 12px;
    font-weight: 900;
    color: #fff;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    letter-spacing: 0;
    font-family: "Microsoft YaHei", "SimHei", sans-serif;
    line-height: 1;
}

/* 银质按钮 */
.btn-silver {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 700;
    color: var(--color-silver-light);
    background: transparent;
    border: 1px solid var(--color-silver-dark);
    transition: all 0.3s ease;
    position: relative;
    letter-spacing: 3px;
    clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.btn-silver:hover {
    border-color: var(--color-silver);
    background: rgba(192, 192, 192, 0.08);
    box-shadow: 0 0 15px rgba(192, 192, 192, 0.2);
    color: #fff;
}

.btn-silver.btn-large {
    padding: 16px 44px;
    font-size: 17px;
}

/* 菱形图标 */
.btn-diamond-icon {
    width: 12px;
    height: 12px;
    position: relative;
    display: inline-block;
    background: currentColor;
    transform: rotate(45deg);
}

/* --- Hero 区 --- */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 80px 60px;
    position: relative;
    overflow: hidden;
}

.hero-inner {
    max-width: 700px;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-block;
    padding: 6px 20px;
    font-size: 12px;
    color: var(--color-blood-light);
    border: 1px solid var(--color-blood);
    letter-spacing: 5px;
    margin-bottom: 30px;
    position: relative;
}

.hero-title {
    font-size: 64px;
    font-weight: 900;
    color: var(--color-silver-light);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 25px;
    text-shadow: 0 0 40px rgba(139, 0, 0, 0.4), 0 4px 12px rgba(0, 0, 0, 0.6);
    letter-spacing: 8px;
    line-height: 1.1;
}

.title-line {
    flex: 0 0 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-blood));
    position: relative;
}

.title-line + .hero-title span:last-child,
.hero-title span:last-child {
    background: linear-gradient(90deg, var(--color-blood), transparent);
}

.hero-slogan {
    font-size: 18px;
    color: var(--color-text-muted);
    margin-bottom: 40px;
    letter-spacing: 6px;
}

/* 红眼发光效果 */
.red-eyes {
    position: absolute;
    top: 15%;
    right: 10%;
    width: 120px;
    height: 40px;
    display: flex;
    gap: 25px;
    z-index: 1;
    opacity: 0.6;
}

.eye {
    width: 40px;
    height: 18px;
    background: radial-gradient(ellipse, #ff0000 0%, #8b0000 50%, transparent 70%);
    border-radius: 50%;
    filter: blur(2px);
    animation: eyeGlow 3s ease-in-out infinite;
}

.eye-right {
    animation-delay: 0.5s;
}

@keyframes eyeGlow {
    0%, 100% {
        opacity: 0.4;
        filter: blur(2px);
    }
    50% {
        opacity: 0.8;
        filter: blur(1px);
    }
}

/* --- 倒计时 --- */
.countdown-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: 30px 35px;
    margin-bottom: 35px;
    max-width: 550px;
    position: relative;
    clip-path: polygon(15px 0, 100% 0, 100% calc(100% - 15px), calc(100% - 15px) 100%, 0 100%, 0 15px);
}

/* 斜切角装饰 */
.bevel-corner {
    position: absolute;
    width: 15px;
    height: 15px;
    border: 1px solid var(--color-blood);
}

.bevel-corner.tl {
    top: 0;
    left: 0;
    border-right: none;
    border-bottom: none;
}

.bevel-corner.tr {
    top: 0;
    right: 0;
    border-left: none;
    border-bottom: none;
}

.bevel-corner.bl {
    bottom: 0;
    left: 0;
    border-right: none;
    border-top: none;
}

.bevel-corner.br {
    bottom: 0;
    right: 0;
    border-left: none;
    border-top: none;
}

.countdown-label {
    font-size: 14px;
    color: var(--color-blood-light);
    margin-bottom: 18px;
    letter-spacing: 5px;
    font-weight: 600;
}

.countdown-display {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    margin-bottom: 12px;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 65px;
}

.countdown-num {
    font-size: 40px;
    font-weight: 900;
    color: var(--color-silver-light);
    line-height: 1;
    font-family: 'Courier New', monospace;
    text-shadow: 0 0 15px rgba(192, 192, 192, 0.3);
}

.countdown-unit {
    font-size: 11px;
    color: var(--color-text-muted);
    margin-top: 6px;
    letter-spacing: 2px;
}

.countdown-sep {
    font-size: 24px;
    color: var(--color-blood);
    line-height: 1;
    margin-top: -8px;
    font-weight: 300;
    opacity: 0.6;
}

.countdown-status {
    font-size: 12px;
    color: var(--color-text-muted);
    letter-spacing: 3px;
}

#countdownFarDisplay {
    font-size: 26px;
    font-weight: 700;
    color: var(--color-silver-light);
    letter-spacing: 4px;
    padding: 15px 0;
    text-shadow: 0 0 15px rgba(192, 192, 192, 0.3);
}

/* --- Hero 按钮 --- */
.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

/* --- 游戏特色 --- */
.features-section {
    background: var(--color-bg-section);
    position: relative;
}

.features-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, var(--color-blood), transparent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: 35px 30px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 0;
    background: linear-gradient(180deg, var(--color-blood), var(--color-purple));
    transition: height 0.4s ease;
}

.feature-card:hover {
    transform: translateX(5px);
    border-color: var(--color-blood);
    box-shadow: -5px 5px 25px rgba(0, 0, 0, 0.4);
}

.feature-card:hover::before {
    height: 100%;
}

.feature-diamond-wrap {
    position: relative;
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
}

.feature-diamond {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--color-blood-light), var(--color-blood-dark));
    box-shadow: 0 0 15px rgba(139, 0, 0, 0.5);
}

.feature-num {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 16px;
    font-weight: 900;
    color: #fff;
    font-family: 'Courier New', monospace;
    z-index: 2;
}

.feature-title {
    font-size: 19px;
    font-weight: 700;
    color: var(--color-silver-light);
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.feature-desc {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.8;
}

.feature-slash-line {
    width: 50px;
    height: 1px;
    background: linear-gradient(90deg, var(--color-blood), transparent);
    margin-top: 18px;
    transform: skewX(-20deg);
}

/* --- 下载中心 --- */
.download-section {
    position: relative;
}

.download-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 25px;
    margin-bottom: 35px;
}

.download-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: 40px 30px;
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
    clip-path: polygon(15px 0, 100% 0, 100% calc(100% - 15px), calc(100% - 15px) 100%, 0 100%, 0 15px);
}

.download-card.main-download {
    border-color: var(--color-blood);
    background:
        linear-gradient(180deg, rgba(139, 0, 0, 0.1) 0%, var(--color-bg-card) 100%);
}

.download-card.main-download::before {
    content: '推荐';
    position: absolute;
    top: 15px;
    right: -30px;
    background: var(--color-blood);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 35px;
    transform: rotate(45deg);
    letter-spacing: 2px;
}

.download-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
    border-color: var(--color-blood-light);
}

.download-diamond-icon {
    position: relative;
    margin: 0 auto 20px;
}

.download-diamond-icon.large {
    width: 70px;
    height: 70px;
}

.download-diamond-icon.small {
    width: 55px;
    height: 55px;
}

.download-diamond-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-blood-light), var(--color-blood-dark), var(--color-purple));
    box-shadow: 0 0 25px rgba(139, 0, 0, 0.5);
}

.download-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-silver-light);
    margin-bottom: 15px;
    letter-spacing: 2px;
}

.download-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.download-buttons .btn-blood,
.download-buttons .btn-silver {
    padding: 10px 22px;
    font-size: 13px;
}

.download-info {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
    padding: 20px 25px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-label {
    font-size: 11px;
    color: var(--color-text-muted);
    letter-spacing: 2px;
}

.info-val {
    font-size: 15px;
    color: var(--color-silver);
    font-weight: 600;
}

/* --- 客服中心 --- */
.service-section {
    background: var(--color-bg-section);
}

.service-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, var(--color-purple), transparent);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.service-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: 35px 22px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.service-card:hover {
    border-color: var(--color-purple-light);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.service-diamond-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 16px;
    position: relative;
}

.service-diamond-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-purple-light), var(--color-purple));
    box-shadow: 0 0 12px rgba(74, 0, 128, 0.5);
}

.service-icon-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    z-index: 2;
}

.service-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-silver-light);
    margin-bottom: 18px;
    letter-spacing: 2px;
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.service-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.service-item:hover {
    border-color: var(--color-purple);
    background: rgba(74, 0, 128, 0.1);
}

.service-label {
    font-size: 12px;
    color: var(--color-text-muted);
}

.service-value {
    font-size: 13px;
    color: var(--color-silver);
    font-weight: 600;
}

.wechat-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.wechat-qr-placeholder {
    width: 110px;
    height: 110px;
    border: 1px dashed var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.2);
    color: var(--color-text-muted);
    font-size: 12px;
}

.wechat-id {
    font-size: 13px;
    color: var(--color-text-muted);
}

.qq-group-box {
    text-align: center;
}

.group-number {
    font-size: 17px;
    color: var(--color-silver);
    font-weight: 700;
    margin-bottom: 6px;
}

/* --- 友情链接 --- */
.links-section {
    padding: 50px 60px;
}

.links-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 25px;
}

.link-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 18px;
    font-size: 13px;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}

.link-item:hover {
    color: var(--color-silver-light);
    border-color: var(--color-blood);
    background: rgba(139, 0, 0, 0.1);
}

.link-diamond {
    width: 6px;
    height: 6px;
    background: var(--color-blood);
    transform: rotate(45deg);
    flex-shrink: 0;
}

/* --- 页脚 --- */
.site-footer {
    background: var(--color-bg-darker);
    border-top: 1px solid var(--color-border);
    position: relative;
    z-index: 1;
}

.footer-top-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, var(--color-blood), var(--color-purple), transparent);
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    padding: 50px 60px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.footer-logo img {
    height: 36px;
}

.footer-war-badge {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 900;
    color: #fff;
    background: linear-gradient(135deg, var(--color-blood-light), var(--color-blood-dark));
    border: 1px solid var(--color-blood);
    position: relative;
    flex-shrink: 0;
    box-shadow: 0 0 8px rgba(139, 0, 0, 0.5);
    letter-spacing: 0;
    font-family: "Microsoft YaHei", "SimHei", sans-serif;
}

.footer-logo-text {
    font-size: 22px;
    font-weight: 900;
    color: var(--color-silver-light);
    letter-spacing: 2px;
}

.footer-slogan {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-top: 8px;
    letter-spacing: 2px;
}

.footer-links h5,
.footer-contact h5 {
    font-size: 15px;
    color: var(--color-silver);
    margin-bottom: 14px;
    letter-spacing: 2px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-links a {
    font-size: 13px;
    color: var(--color-text-muted);
}

.footer-links a:hover {
    color: var(--color-silver-light);
}

.footer-contact p {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 6px;
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding: 18px 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.footer-bottom p {
    font-size: 12px;
    color: var(--color-text-muted);
}

.beian-info a {
    color: var(--color-text-muted);
    font-size: 12px;
}

.beian-info a:hover {
    color: var(--color-silver);
}

/* --- 统计代码容器 --- */
.site-statistics {
    display: none;
}

/* --- 返回顶部按钮 --- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: rgba(15, 15, 15, 0.9);
    border: 1px solid var(--color-blood);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: rgba(139, 0, 0, 0.2);
    box-shadow: 0 0 15px rgba(139, 0, 0, 0.4);
}

.back-top-war {
    font-size: 14px;
    font-weight: 900;
    color: var(--color-blood-light);
    letter-spacing: 0;
    font-family: "Microsoft YaHei", "SimHei", sans-serif;
    line-height: 1;
}

/* --- 移动端菜单按钮 --- */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    background: rgba(10, 10, 10, 0.9);
    border: 1px solid var(--color-border);
}

.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-silver);
    transition: all 0.3s ease;
}

/* --- 响应式 --- */
@media (max-width: 1200px) {
    :root {
        --sidebar-width: 240px;
    }

    section {
        padding: 70px 40px;
    }

    .links-section {
        padding: 40px 40px;
    }

    .footer-inner {
        padding: 40px;
    }

    .footer-bottom {
        padding: 15px 40px;
    }

    .blood-moon {
        width: 140px;
        height: 140px;
    }
}

@media (max-width: 900px) {
    .side-nav {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .side-nav.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    section {
        padding: 60px 30px;
    }

    .links-section {
        padding: 40px 30px;
    }

    .hero-section {
        padding: 80px 30px 60px;
    }

    .footer-inner {
        grid-template-columns: 1fr 1fr;
        padding: 35px 30px;
    }

    .footer-info {
        grid-column: 1 / -1;
    }

    .footer-bottom {
        padding: 15px 30px;
        flex-direction: column;
        text-align: center;
    }

    .blood-moon {
        width: 120px;
        height: 120px;
        top: 8%;
        right: 10%;
        opacity: 0.7;
    }

    .red-eyes {
        display: none;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 40px;
        letter-spacing: 4px;
        gap: 15px;
    }

    .title-line {
        flex: 0 0 30px;
    }

    .hero-slogan {
        font-size: 15px;
        letter-spacing: 3px;
        margin-bottom: 30px;
    }

    .countdown-box {
        padding: 22px 20px;
    }

    .countdown-num {
        font-size: 30px;
    }

    .countdown-item {
        min-width: 48px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn-blood.btn-large,
    .btn-silver.btn-large {
        width: 100%;
        max-width: 280px;
        padding: 14px 36px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .download-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .service-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .section-title {
        font-size: 24px;
        letter-spacing: 2px;
    }

    .download-info {
        flex-direction: column;
        gap: 15px;
    }

    .download-buttons {
        flex-direction: column;
    }

    .download-buttons .btn-blood,
    .download-buttons .btn-silver {
        width: 100%;
    }
}

@media (max-width: 480px) {
    section {
        padding: 50px 20px;
    }

    .hero-section {
        padding: 70px 20px 50px;
    }

    .hero-title {
        font-size: 32px;
        letter-spacing: 3px;
    }

    .hero-badge {
        font-size: 11px;
        letter-spacing: 3px;
    }

    .countdown-num {
        font-size: 24px;
    }

    .countdown-item {
        min-width: 40px;
    }

    .section-title {
        font-size: 20px;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: 25px;
        padding: 30px 20px;
    }

    .footer-bottom {
        padding: 12px 20px;
    }

    .links-section {
        padding: 30px 20px;
    }
}