:root {
    --primary: #3F6E78;
    --secondary: #2D4F5A;
    --accent: #89D5CC;
    --light: #ffffff;
    --dark: #101B22;
    /* 新增主题背景变量 */
    --day-bg: rgba(255, 255, 255, 0.85);
    --night-bg: rgba(0, 0, 0, 0.85);
    --glass-bg: rgba(255, 255, 255, 0.16);
    --glass-stroke: rgba(255, 255, 255, 0.35);
    --glass-highlight: rgba(255, 255, 255, 0.45);
    --glass-shadow: rgba(4, 10, 25, 0.22);
    --tint-primary: rgba(63, 110, 120, 0.09);
    --tint-accent: rgba(137, 213, 204, 0.08);
}

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

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    background-blend-mode: overlay;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    /* 固定背景增强景深效果 */
    color: var(--dark);
    overflow-x: hidden;

    background: transparent !important;
    /* 关闭原有背景 */
}

/* 添加动态粒子背景增强玻璃质感 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 30%, rgba(63, 110, 120, 0.2) 0%, transparent 42%),
        radial-gradient(circle at 80% 70%, rgba(137, 213, 204, 0.18) 0%, transparent 40%);
    pointer-events: none;
    z-index: -3;
    /* 置于背景层之下 */
    animation: float 90s infinite linear;
}

@keyframes float {
    0% {
        transform: translate(0, 0);
    }

    25% {
        transform: translate(-10px, -5px);
    }

    50% {
        transform: translate(0, -10px);
    }

    75% {
        transform: translate(10px, -5px);
    }

    100% {
        transform: translate(0, 0);
    }
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 15px;
    /* 通过CSS变量控制颜色 */
    filter: invert(40%) sepia(90%) saturate(1200%) hue-rotate(210deg);
}

/* 深色模式适配 */
@media (prefers-color-scheme: dark) {
    .feature-icon {
        filter: invert(90%) sepia(10%) saturate(200%) hue-rotate(200deg);
    }
}


/* 视频容器定位 */
#bg-video {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    min-width: 100%;
    min-height: 100%;
    z-index: -2;
    object-fit: cover;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

@keyframes theme-blend {
    0% {
        opacity: 0;
    }

    50% {
        opacity: 0.6;
    }

    100% {
        opacity: 0.95;
    }
}

/* 主题覆盖层 */
#theme-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0;
    /* 初始隐藏 */
    background-color: var(--light);
    /* 初始设为浅色 */
    transition:
        opacity 1.2s ease-out 0.3s,
        /* 延迟0.3秒开始 */
        background-color 0.8s cubic-bezier(0.16, 0.85, 0.3, 1.05);
    /* 更柔和的曲线 */
    pointer-events: none;
    /* 防止阻挡点击 */
}

/* 夜间模式检测 */
@media (prefers-color-scheme: dark) {
    :root {
        --night-bg: rgba(0, 0, 0, 0.85);
    }
}

.container {
    position: relative;
    max-width: 1000px;
    width: 90%;
    background:
        linear-gradient(160deg, rgba(255, 255, 255, 0.46), rgba(255, 255, 255, 0.2) 34%, var(--tint-primary) 100%),
        linear-gradient(135deg, var(--tint-accent), rgba(255, 255, 255, 0.12)),
        var(--glass-bg);
    backdrop-filter: blur(18px) saturate(180%) contrast(1.07);
    /* 增加模糊和饱和度 */
    -webkit-backdrop-filter: blur(15px) saturate(180%);
    /* Safari兼容 */
    border-radius: 20px;
    /* 增强玻璃质感效果 */
    border: 1px solid var(--glass-stroke);
    box-shadow:
        0 18px 45px var(--glass-shadow),
        inset 0 1px 0 rgba(255, 255, 255, 0.45),
        inset 0 -12px 28px rgba(113, 166, 255, 0.08);
    padding: 56px 48px 44px;
    text-align: left;
    overflow: hidden;
    z-index: 2;
    margin-top: calc(60px + 40px);
    /* Header高度 + 安全间距 */
    scroll-margin-top: 80px;
    /* 锚点定位补偿 */
}

.hero {
    margin-bottom: 30px;
}

.hero-kicker {
    display: inline-block;
    margin-bottom: 14px;
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid rgba(63, 110, 120, 0.25);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.56), rgba(137, 213, 204, 0.06));
    color: #2c4952;
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    font-weight: 700;
}

.hero-intro {
    margin-top: 20px;
    max-width: none;
    width: 100%;
    color: #314750;
    font-size: 1.08rem;
    line-height: 1.9;
    text-wrap: pretty;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 32px;
}

.section-head {
    margin: 0 0 14px;
    padding-top: 4px;
}

.section-head h2 {
    font-size: 1.05rem;
    color: #274853;
    margin-bottom: 4px;
    letter-spacing: 0.02em;
}

.section-head p {
    color: #5f757d;
    font-size: 0.9rem;
}

.feature-card {
    border-radius: 14px;
    padding: 22px 20px;
    background: linear-gradient(140deg, rgba(255, 255, 255, 0.44), rgba(63, 110, 120, 0.07));
    border: 1px solid rgba(255, 255, 255, 0.42);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.45),
        0 10px 22px rgba(17, 30, 40, 0.1);
    transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.feature-card:nth-child(2n) {
    background: linear-gradient(140deg, rgba(255, 255, 255, 0.42), rgba(137, 213, 204, 0.06));
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.45),
        0 12px 22px rgba(17, 30, 40, 0.13);
}

.feature-card h3 {
    color: var(--secondary);
    margin: 4px 0 8px;
    font-size: 1.08rem;
}

.feature-card p {
    color: #3f555d;
    line-height: 1.72;
    font-size: 0.95rem;
}

.status-bar {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin: 0 0 30px;
}

.status-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 14px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    background: linear-gradient(140deg, rgba(255, 255, 255, 0.42), rgba(63, 110, 120, 0.07));
    transition: background 0.25s ease;
}

.status-item:hover {
    background: linear-gradient(140deg, rgba(255, 255, 255, 0.48), rgba(137, 213, 204, 0.09));
}

.status-label {
    font-size: 0.8rem;
    color: #5a6b72;
}

.status-value {
    font-size: 0.95rem;
    color: #20343d;
    font-weight: 600;
}

.container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.35) 0%, rgba(255, 255, 255, 0) 45%),
        radial-gradient(circle at 70% 70%, rgba(120, 198, 255, 0.18) 0%, rgba(120, 198, 255, 0) 50%);
    animation: rotate 120s linear infinite;
    z-index: -1;
}

.container::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(115deg, rgba(255, 255, 255, 0) 24%, rgba(231, 250, 247, 0.18) 50%, rgba(255, 255, 255, 0) 76%);
    transform: translateX(-120%);
    opacity: 0.75;
    pointer-events: none;
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

h1 {
    font-size: 3rem;
    margin-bottom: 0.55rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    position: relative;
    display: inline-block;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    /* 增加文字阴影增强立体感 */
}

.tagline {
    font-size: 1.5rem;
    color: #5a5a5a;
    margin-bottom: 40px;
    font-weight: 300;
}

.coming-soon {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 10px 30px;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 40px;
    box-shadow: 0 5px 20px rgba(63, 110, 120, 0.26);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(63, 110, 120, 0.4);
    }

    70% {
        box-shadow: 0 0 0 15px rgba(63, 110, 120, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(63, 110, 120, 0);
    }
}

.description {
    font-size: 1.1rem;
    line-height: 1.8;
    max-width: 700px;
    margin: 0 auto 40px;
    color: #4a4a4a;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    /* 增强文字可读性 */
}

.features {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 25px;
    margin-bottom: 50px;
}

.feature {
    flex: 1;
    min-width: 200px;
    padding: 25px 20px;
    border-radius: 15px;
    background:
        linear-gradient(155deg, rgba(255, 255, 255, 0.36), rgba(255, 255, 255, 0.12) 45%, rgba(255, 255, 255, 0.05)),
        rgba(255, 255, 255, 0.22);
    backdrop-filter: blur(14px) saturate(170%);
    /* 更强烈的毛玻璃效果 */
    -webkit-backdrop-filter: blur(12px);
    /* Safari兼容 */
    /* 玻璃边缘光效 */
    border: 1px solid var(--glass-stroke);
    box-shadow:
        0 8px 22px rgba(8, 16, 34, 0.14),
        inset 0 1px 0 rgba(255, 255, 255, 0.42),
        inset 0 -10px 20px rgba(140, 198, 255, 0.08);
    transition: all 0.4s ease;
}

.feature:hover {
    transform: translateY(-10px) scale(1.03);
    /* 增加轻微放大效果 */
    box-shadow:
        0 15px 30px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

.feature i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 15px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    /* 图标阴影增强立体感 */
}

.feature h3 {
    margin-bottom: 10px;
    color: var(--secondary);
}

.contact {
    margin-top: 8px;
}

.contact a {
    display: inline-flex;
    align-items: center;
    color: var(--primary);
    font-size: 1.2rem;
    text-decoration: none;
    padding: 12px 25px;
    border: 2px solid var(--primary);
    border-radius: 50px;
    transition: all 0.4s ease;
    /* 玻璃按钮效果 */
    background: linear-gradient(140deg, rgba(255, 255, 255, 0.48), rgba(137, 213, 204, 0.09));
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.contact a:hover {
    background: rgba(63, 110, 120, 0.86);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 7px 20px rgba(63, 110, 120, 0.26);
    backdrop-filter: blur(0px);
    /* 悬停时取消模糊增强点击感 */
}

.contact a i {
    margin-right: 10px;
}

.icp {
    margin-top: 50px;
    font-size: 0.9rem;
    color: #777;
}

.icp a {
    color: var(--primary);
    text-decoration: none;
    transition: all 0.3s;
    position: relative;
}

.icp a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--primary);
    transition: width 0.3s;
}

.icp a:hover::after {
    width: 100%;
}



/* 主导航栏样式 */
.main-header {
    position: fixed;
    top: 20px;
    height: 60px;
    /* 明确固定高度 */
    right: 30px;
    left: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(14px) saturate(165%);
    -webkit-backdrop-filter: blur(10px);
    background:
        linear-gradient(150deg, rgba(255, 255, 255, 0.46), rgba(137, 213, 204, 0.07)),
        rgba(255, 255, 255, 0.16);
    border-radius: 15px;
    padding: 12px 25px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--glass-stroke);
    transition: all 0.3s ease;
}

@keyframes glass-sheen {
    0%, 55%, 100% {
        transform: translateX(-120%);
    }
    75% {
        transform: translateX(120%);
    }
}

/* 向下滚动时适当缩小Header */
body.scrolled .main-header {
    height: 50px;
    top: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 导航切换样式 */
.nav-switch {
    display: flex;
    gap: 25px;
}

.nav-link {
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 15px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.nav-link.active {
    background: rgba(63, 110, 120, 0.15);
    color: var(--primary);
}

.nav-link:hover {
    background: rgba(63, 110, 120, 0.22);
}

a:focus-visible {
    outline: 2px solid rgba(137, 213, 204, 0.72);
    outline-offset: 2px;
}

/* 登录按钮核心样式 */
.login-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px clamp(12px, 2vw, 20px);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white !important;
    border-radius: 30px;
    text-decoration: none;
    transition: transform 0.3s ease;
    min-width: max-content !important;
    /* 强制生效 */
    white-space: nowrap;
    position: relative;
    contain: layout;
    /* 防止外部布局影响 */
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(63, 110, 120, 0.28);
}

@media (max-width: 768px) {}

/* 响应式适配层叠结构 */
/* 大屏幕适配 (900px以下) */
@media (max-width: 900px) {
    .container {
        max-width: 92%;
        margin-top: calc(50px + 30px);
        scroll-margin-top: 60px;
        padding: 42px 28px 34px;
    }

    .main-header {
        height: 50px;
        top: 10px;
        padding: 10px 15px;
        justify-content: space-between;
    }

    .login-btn {
        padding: 8px clamp(14px, 3vw, 20px);
        /* 增加最小间距 */
        font-size: 0.95rem;
    }

    .nav-link span {
        display: inline;
    }

    .feature-grid,
    .status-bar {
        grid-template-columns: 1fr;
    }
}

/* 中屏幕适配 (768px以下) */
@media (max-width: 768px) {
    .container {
        padding: 34px 18px 28px;
        margin-top: calc(45px + 25px);
        scroll-margin-top: 55px;
    }

    h1 {
        font-size: 2.25rem;
    }

    .hero-intro {
        font-size: 0.98rem;
    }

    .main-header {
        height: 45px;
        right: 15px;
        left: 15px;
    }

    .nav-link {
        padding: 8px;
        font-size: 1.2rem;
    }

    .nav-link span {
        display: none;
    }

    .login-btn {
        min-width: max-content !important;
        /* 二次保护 */
    }

    .login-btn span {
        font-size: 0.85rem;
        /* 保留可见性 */
        opacity: 1;
        width: auto;
        transition: all 0.5s;
    }

    .hero {
        margin-bottom: 22px;
    }
}

/* 小屏幕适配 (640px以下) */
@media (max-width: 640px) {
    .main-header {
        height: 40px;
    }

    .container {
        margin-top: calc(40px + 20px);
        scroll-margin-top: 50px;
    }

    .login-btn {
        padding: 10px 14px;
        /* 适当放大按钮 */
        font-size: 0.85rem;
    }

    .login-btn span {
        display: inline !important;
        /* 强制显示文字 */
        font-size: 0.8rem;
    }

    .login-btn::after {
        display: none;
        /* 关闭应急提示 */
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .container::after {
        display: none;
    }
}