@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ==========================================================================
   1. 全局基础设置与变量
   ========================================================================== */
:root {
    --color-brand-purple: #6C3CE9;
    --color-brand-pink: #E841B5;
    --color-brand-blue: #2A33D6;
    --hero-gradient: linear-gradient(115deg, #2A33D6 0%, #5130DC 30%, #8733E3 60%, #C837D8 85%, #E841B5 100%);
    --bg-slate-50: #f8fafc;
    --bg-slate-100: #f1f5f9;
    --bg-slate-900: #0f172a;
    --text-slate-900: #0f172a;
    --text-slate-800: #1e293b;
    --text-slate-700: #334155;
    --text-slate-600: #475569;
    --text-slate-500: #64748b;
    --text-slate-400: #94a3b8;
    --purple-100: #f3e8ff;
    --purple-200: #e9d5ff;
}

html {
    scroll-behavior: smooth;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: #ffffff;
    color: var(--text-slate-800);
    -webkit-font-smoothing: antialiased;
    margin: 0;
    padding: 0;
}

::selection {
    background-color: #8B5CF6;
    color: #ffffff;
}

/* 隐藏滚动条类 */
.no-scrollbar::-webkit-scrollbar {
    display: none;
}
.no-scrollbar {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

/* 容器通用类 */
.container-custom {
    max-width: 80rem; /* 1280px */
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}
@media (min-width: 640px) {
    .container-custom {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
}
@media (min-width: 1024px) {
    .container-custom {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}

/* 背景与渐变 */
.hero-gradient {
    background: var(--hero-gradient);
}
.app-custom-bg {
    background-color: #f9faff;
}

/* ==========================================================================
   2. 顶部通告条 (Top Notice)
   ========================================================================== */
.top-notice {
    background-color: var(--bg-slate-900);
    color: #ffffff;
    font-size: 0.75rem;
    padding: 0.5rem 1rem;
    text-align: center;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    z-index: 30;
}
@media (min-width: 640px) {
    .top-notice {
        font-size: 0.875rem;
    }
}
.top-notice img {
    height: 1rem;
    width: auto;
    object-fit: contain;
    display: inline-block;
}
@media (min-width: 640px) {
    .top-notice img {
        height: 1.25rem;
    }
}
.top-notice a {
    color: #a5b4fc;
    text-decoration: underline;
    margin-left: 0.25rem;
    transition: color 0.2s;
}
.top-notice a:hover {
    color: #ffffff;
}

/* ==========================================================================
   3. 导航栏 (Sticky Navigation Bar)
   ========================================================================== */
.sticky-navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(8px);
    color: #ffffff;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}
.nav-container {
    padding-top: 1rem;
    padding-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo-img {
    height: 2rem;
    width: auto;
    object-fit: contain;
    transition: transform 0.2s;
}
.group:hover .nav-logo-img {
    transform: scale(1.05);
}
.nav-links {
    display: none;
    align-items: center;
    gap: 2rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--purple-100);
}
@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }
}
.nav-links a, .nav-dropdown-btn {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
}
.nav-links a:hover, .nav-dropdown-btn:hover {
    color: var(--purple-200);
}
.nav-links a.active {
    color: #ffffff;
    font-weight: 700;
}
.nav-dropdown-btn {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: inherit;
    font-family: inherit;
}
.qrcode-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.75rem;
    width: 10rem;
    background-color: #ffffff;
    border-radius: 1rem;
    padding: 0.75rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    border: 2px solid var(--purple-200);
    z-index: 50;
    text-align: center;
}
.qrcode-dropdown.hidden {
    display: none;
}
.qrcode-dropdown img {
    width: 100%;
    height: auto;
    border-radius: 0.75rem;
    object-fit: contain;
    border: 1px solid #f1f5f9;
    padding: 0.25rem;
}

.btn-nav-download {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #ffffff;
    font-weight: 600;
    padding: 0.625rem 1.25rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    text-decoration: none;
    backdrop-filter: blur(4px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: all 0.2s;
}
.btn-nav-download:hover {
    background-color: rgba(255, 255, 255, 0.2);
}
.btn-nav-download:active {
    transform: scale(0.95);
}

/* ==========================================================================
   4. Hero 区域 (首页与推广页)
   ========================================================================== */
.hero-header {
    color: #ffffff;
    position: relative;
    overflow: hidden;
}
.hero-bg-blur-1 {
    position: absolute;
    top: 25%;
    left: 2.5rem;
    width: 10rem;
    height: 10rem;
    background-color: rgba(96, 165, 250, 0.2);
    border-radius: 9999px;
    filter: blur(48px);
    pointer-events: none;
}
.hero-bg-blur-2 {
    position: absolute;
    bottom: 2.5rem;
    right: 33.333%;
    width: 16rem;
    height: 16rem;
    background-color: rgba(192, 132, 252, 0.2);
    border-radius: 9999px;
    filter: blur(48px);
    pointer-events: none;
}
.hero-bg-blur-3 {
    position: absolute;
    top: 3rem;
    right: 3rem;
    width: 6rem;
    height: 6rem;
    background-color: rgba(244, 114, 182, 0.3);
    border-radius: 9999px;
    filter: blur(32px);
    pointer-events: none;
}

.hero-content {
    padding-top: 3rem;
    padding-bottom: 5rem;
    position: relative;
    z-index: 10;
}
@media (min-width: 1024px) {
    .hero-content {
        padding-top: 5rem;
        padding-bottom: 9rem;
    }
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
}
@media (min-width: 1024px) {
    .hero-grid {
        grid-template-columns: repeat(12, minmax(0, 1fr));
    }
    .hero-left-col {
        grid-column: span 6 / span 6;
    }
    .hero-right-col {
        grid-column: span 6 / span 6;
    }
    .promo-hero-left {
        grid-column: span 5 / span 5;
    }
    .promo-hero-right {
        grid-column: span 7 / span 7;
    }
}

.hero-text-block {
    text-align: center;
}
@media (min-width: 1024px) {
    .hero-text-block {
        text-align: left;
    }
}

.hero-title {
    font-size: 2.25rem;
    line-height: 1.2;
    font-weight: 900;
    color: #ffffff;
    letter-spacing: -0.025em;
    margin: 0;
}
@media (min-width: 640px) {
    .hero-title {
        font-size: 3rem;
    }
}
@media (min-width: 1024px) {
    .hero-title {
        font-size: 3.75rem;
    }
}

.text-gradient-gold {
    background: linear-gradient(to right, #fcd34d, #fbcfe8, #ffffff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cert-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: rgba(88, 28, 135, 0.5);
    backdrop-filter: blur(4px);
    padding: 0.375rem 0.875rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    color: var(--purple-200);
    margin-top: 1rem;
}
@media (min-width: 640px) {
    .cert-badge {
        font-size: 0.875rem;
    }
}
.cert-badge img {
    height: 1rem;
    width: auto;
    object-fit: contain;
}

/* Hero 特性圆圈 */
.hero-stats-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding-top: 1.5rem;
}
@media (min-width: 640px) {
    .hero-stats-group {
        gap: 1.5rem;
    }
}
@media (min-width: 1024px) {
    .hero-stats-group {
        justify-content: flex-start;
    }
}

.stat-circle {
    width: 7rem;
    height: 7rem;
    border-radius: 9999px;
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s;
}
@media (min-width: 640px) {
    .stat-circle {
        width: 8rem;
        height: 8rem;
    }
}
.stat-circle:hover {
    transform: scale(1.05);
}
.stat-num {
    font-size: 1.5rem;
    font-weight: 800;
    color: #ffffff;
}
@media (min-width: 640px) {
    .stat-num {
        font-size: 1.875rem;
    }
}
.stat-num span {
    font-size: 0.75rem;
    font-weight: 400;
}
@media (min-width: 640px) {
    .stat-num span {
        font-size: 0.875rem;
    }
}
.stat-label {
    font-size: 11px;
    color: var(--purple-200);
    margin-top: 0.125rem;
}
@media (min-width: 640px) {
    .stat-label {
        font-size: 0.75rem;
    }
}

/* 下载按钮组 */
.hero-btn-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-top: 1rem;
}
@media (min-width: 640px) {
    .hero-btn-group {
        flex-direction: row;
        align-items: center;
    }
}
@media (min-width: 1024px) {
    .hero-btn-group {
        justify-content: flex-start;
    }
}

.btn-primary-white {
    width: 100%;
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background-color: #ffffff;
    color: #1e1b4b;
    font-weight: 800;
    padding: 1rem 2rem;
    border-radius: 9999px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    text-decoration: none;
    transition: all 0.2s;
}
@media (min-width: 640px) {
    .btn-primary-white {
        width: auto;
    }
}
.btn-primary-white:hover {
    background-color: #faf5ff;
}
.btn-primary-white:active {
    transform: scale(0.95);
}

.btn-badge-tag {
    position: absolute;
    top: -0.625rem;
    right: 1.5rem;
    background: linear-gradient(to right, #f59e0b, #f97316);
    color: #ffffff;
    font-size: 10px;
    font-weight: 700;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.btn-secondary-glass {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    font-weight: 600;
    padding: 1rem 2rem;
    border-radius: 9999px;
    backdrop-filter: blur(4px);
    text-decoration: none;
    transition: all 0.2s;
}
@media (min-width: 640px) {
    .btn-secondary-glass {
        width: auto;
    }
}
.btn-secondary-glass:hover {
    background-color: rgba(255, 255, 255, 0.2);
}
.btn-secondary-glass:active {
    transform: scale(0.95);
}

/* Hero 右侧加速球与动效 */
.hero-device-wrapper {
    position: relative;
    width: 100%;
    max-width: 42rem;
    transform: scale(1.1);
}

.speed-ball-container {
    position: absolute;
    left: 7%;
    top: 56%;
    transform: translate(-40px, -50%);
    z-index: 20;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36%;
    height: 46%;
}

.outer-ring-1 {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 7rem;
    height: 7rem;
    border-radius: 42%;
    background: linear-gradient(to top right, rgba(244, 63, 94, 0.4), rgba(244, 114, 182, 0.3));
    filter: blur(1px);
    transition: all 0.5s;
}
.outer-ring-2 {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8rem;
    height: 8rem;
    border-radius: 46%;
    background: linear-gradient(to bottom left, rgba(244, 114, 182, 0.25), rgba(225, 29, 72, 0.2));
    filter: blur(2px);
    transition: all 0.5s;
}
@media (min-width: 640px) {
    .outer-ring-1 { width: 8rem; height: 8rem; }
    .outer-ring-2 { width: 9.5rem; height: 9.5rem; }
}

.main-speed-ball {
    position: relative;
    z-index: 10;
    width: 5rem;
    height: 5rem;
    border-radius: 9999px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.5s;
}
@media (min-width: 640px) {
    .main-speed-ball {
        width: 6rem;
        height: 6rem;
    }
}

.ball-state-countdown {
    background: linear-gradient(to top right, #f43f5e, #ec4899);
    box-shadow: 0 0 20px rgba(244, 63, 94, 0.7);
}
.ball-state-active {
    background: linear-gradient(to top right, #38bdf8, #2563eb);
    box-shadow: 0 0 25px rgba(56, 189, 248, 0.8);
}

.speed-ball-num {
    font-size: 1.25rem;
    font-weight: 900;
    color: #ffffff;
    letter-spacing: 0.1em;
}
@media (min-width: 640px) {
    .speed-ball-num { font-size: 1.5rem; }
}
.speed-ball-text-active {
    font-size: 10px;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: 0.05em;
}
@media (min-width: 640px) {
    .speed-ball-text-active { font-size: 0.75rem; }
}

/* 底部 Wave SVG */
.hero-wave {
    width: 100%;
    overflow: hidden;
    line-height: 0;
    position: relative;
    z-index: 10;
    margin-bottom: -1px;
}
.hero-wave svg {
    position: relative;
    display: block;
    width: 100%;
    height: 4rem;
    color: #ffffff;
    fill: currentColor;
}
@media (min-width: 640px) {
    .hero-wave svg {
        height: 6rem;
    }
}

/* ==========================================================================
   5. 全球热门应用与卖点区域 (Sections)
   ========================================================================== */
.section-padding {
    padding-top: 4rem;
    padding-bottom: 4rem;
}
@media (min-width: 640px) {
    .section-padding {
        padding-top: 6rem;
        padding-bottom: 6rem;
    }
}

.section-title {
    font-size: 1.875rem;
    font-weight: 800;
    color: var(--text-slate-900);
    letter-spacing: -0.025em;
    text-align: center;
}
@media (min-width: 640px) {
    .section-title {
        font-size: 2.25rem;
    }
}

.feature-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(to right, #9333ea, #4f46e5);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.375rem 0.75rem;
    border-radius: 9999px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.feature-title {
    font-size: 1.875rem;
    font-weight: 900;
    color: var(--text-slate-900);
    letter-spacing: -0.025em;
    line-height: 1.25;
}
@media (min-width: 640px) { .feature-title { font-size: 2.25rem; } }
@media (min-width: 1024px) { .feature-title { font-size: 3rem; } }

.feature-desc {
    font-size: 1rem;
    color: var(--text-slate-600);
    line-height: 1.625;
    max-width: 36rem;
    margin-left: auto;
    margin-right: auto;
}
@media (min-width: 640px) { .feature-desc { font-size: 1.125rem; } }
@media (min-width: 1024px) { .feature-desc { margin-left: 0; margin-right: 0; } }

.feature-img-box {
    position: relative;
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
}
.feature-img-box img {
    width: 100%;
    height: auto;
    border-radius: 1.5rem;
    object-fit: cover;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    transition: transform 0.3s;
}
.feature-img-box img:hover {
    transform: scale(1.02);
}

/* ==========================================================================
   6. 用户评价区域 (Reviews)
   ========================================================================== */
.reviews-wrapper {
    position: relative;
    max-width: 56rem;
    margin-left: auto;
    margin-right: auto;
}
.reviews-container {
    display: flex;
    gap: 1.5rem;
    overflow-x: auto;
    padding-top: 1rem;
    padding-bottom: 1rem;
    scroll-behavior: smooth;
}
.review-card {
    min-width: 290px;
    background-color: #ffffff;
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1rem;
    flex-shrink: 0;
}
@media (min-width: 640px) {
    .review-card {
        min-width: 380px;
    }
}
.review-stars {
    color: #fbbf24;
    font-size: 0.875rem;
}
.review-text {
    font-size: 0.875rem;
    color: var(--text-slate-700);
    line-height: 1.625;
}
.review-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-top: 0.5rem;
    border-top: 1px solid #f1f5f9;
}
.review-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 9999px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
}

.review-nav-btns {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
}
.review-btn {
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 9999px;
    background-color: #ffffff;
    border: none;
    color: var(--text-slate-700);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all 0.2s;
}
.review-btn:hover { background-color: #f1f5f9; }
.review-btn:active { transform: scale(0.95); }

/* ==========================================================================
   7. 下载区域 (Download Grid) —— 适度调大按钮大小
   ========================================================================== */
.download-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 64rem;
    margin: 0 auto;
}
@media (min-width: 640px) { .download-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .download-grid { grid-template-columns: repeat(4, 1fr); } }

.download-card {
    background-color: var(--bg-slate-50);
    border-radius: 1rem;
    padding: 2rem 1.25rem;
    box-sizing: border-box;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    overflow: hidden;
    transition: all 0.3s;
}
.download-card:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}
.download-icon-box {
    height: 8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s;
}
.download-card:hover .download-icon-box {
    transform: scale(1.1);
}

/* 适度调大：把最小宽度和最大宽度放宽，同时增加上下左右的 padding */
.btn-download-action {
    width: 90%;               /* 稍微加宽一点，占卡片宽度的 90% */
    max-width: 220px;         /* 限制最大宽度，不至于贴边 */
    min-width: 170px;         /* 保证有足够的大气感 */
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: linear-gradient(to right, #9333ea, #4f46e5);
    color: #ffffff;
    font-weight: 700;
    font-size: 0.9rem;        /* 字号稍微调大一点点 */
    padding: 0.75rem 1.25rem; /* 增加上下左右的内边距，使按钮更大气 */
    border-radius: 9999px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    text-decoration: none;
    white-space: nowrap;
    transition: opacity 0.2s;
}
.btn-download-action:hover {
    opacity: 0.95;
}
/* ==========================================================================
   8. 推广页专属样式 (Promo Page Specials)
   ========================================================================== */
.promo-title {
    font-size: 2.25rem;
    font-weight: 900;
    color: #fcd34d;
    letter-spacing: -0.025em;
    margin: 0;
}
@media (min-width: 640px) { .promo-title { font-size: 3rem; } }

.promo-qr-box {
    display: inline-block;
    background-color: #ffffff;
    border-radius: 1rem;
    padding: 0.75rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    max-width: 200px;
}
.promo-qr-box img {
    width: 100%;
    height: auto;
    border-radius: 0.75rem;
    object-fit: contain;
}

.promo-img-hero {
    width: 100%;
    max-width: 42rem;
    height: auto;
    object-fit: contain;
    transform: scale(1.05);
}
@media (min-width: 1024px) {
    .promo-img-hero {
        transform: scale(1.1);
    }
}

.promo-cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}
@media (min-width: 768px) {
    .promo-cards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.promo-card {
    background: #ffffff;
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    transition: all 0.3s ease;
}
@media (min-width: 640px) {
    .promo-card {
        padding: 2rem;
    }
}
.promo-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 30px -10px rgba(0, 0, 0, 0.1);
}

/* ==========================================================================
   9. 页脚 (Footer)
   ========================================================================== */
.footer-main {
    background-color: var(--bg-slate-50);
    padding-top: 4rem;
    padding-bottom: 3rem;
    color: var(--text-slate-600);
    font-size: 0.875rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid #e2e8f0;
}
@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(5, 1fr);
    }
    .footer-brand-col {
        grid-column: span 2 / span 2;
    }
}

.social-icon-btn {
    width: 2rem;
    height: 2rem;
    border-radius: 9999px;
    background-color: #e2e8f0;
    color: var(--text-slate-600);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.2s;
}
.social-icon-btn:hover {
    background-color: var(--color-brand-purple);
    color: #ffffff;
}

.footer-link-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.75rem;
}
.footer-link-list a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
}
.footer-link-list a:hover {
    color: var(--color-brand-purple);
}

.lang-select {
    background-color: #ffffff;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
    color: var(--text-slate-700);
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    outline: none;
}

/* ==========================================================================
   10. CSS 动效定义 (Animations)
   ========================================================================== */
@keyframes floatAnim {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes orbitRotateAnim {
    0% { transform: translate(-50%, -50%) rotate(0deg) scale(1); }
    50% { transform: translate(-50%, -50%) rotate(180deg) scale(1.04); }
    100% { transform: translate(-50%, -50%) rotate(360deg) scale(1); }
}

@keyframes counterRotateAnim {
    0% { transform: translate(-50%, -50%) rotate(360deg) scale(1.04); }
    50% { transform: translate(-50%, -50%) rotate(180deg) scale(0.96); }
    100% { transform: translate(-50%, -50%) rotate(0deg) scale(1); }
}

@keyframes bounceAnim {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

@keyframes pulseScaleFastAnim {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.animate-float-custom {
    animation: floatAnim 5s ease-in-out infinite;
}
.animate-orbit-custom {
    animation: orbitRotateAnim 5s linear infinite;
}
.animate-counter-custom {
    animation: counterRotateAnim 7s linear infinite;
}
.animate-bounce-custom {
    animation: bounceAnim 1s ease-in-out infinite;
}
.animate-pulse-scale-fast {
    animation: pulseScaleFastAnim 2s ease-in-out infinite;
}

/* ==========================================================================
   火爆卖点区域 (Features Section) - Flexbox 完美居中与反转布局
   ========================================================================== */
.feature-grid {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    align-items: center;
}

.feature-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
    width: 100%;
}

.feature-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(to right, #9333ea, #4f46e5);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.375rem 0.75rem;
    border-radius: 9999px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.feature-title {
    font-size: 1.875rem;
    font-weight: 900;
    color: var(--text-slate-900);
    letter-spacing: -0.025em;
    line-height: 1.25;
    margin: 0;
}

.feature-desc {
    font-size: 1rem;
    color: var(--text-slate-600);
    line-height: 1.625;
    max-width: 36rem;
    margin: 0 auto;
}

.feature-img-box {
    position: relative;
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
}

.feature-img-box img {
    width: 100%;
    height: auto;
    border-radius: 1.5rem;
    object-fit: cover;
    filter: drop-shadow(0 25px 25px rgba(0, 0, 0, 0.15));
    transition: transform 0.3s ease;
}

.feature-img-box img:hover {
    transform: scale(1.02);
}

/* 桌面端大屏适配 (>=1024px) */
@media (min-width: 1024px) {
    .feature-grid {
        flex-direction: row;
        justify-content: space-between;
        align-items: center; 
    }

    .feature-grid.feature-reverse {
        flex-direction: row-reverse;
    }

    .feature-content, .feature-img-box {
        flex: 1;
        max-width: 50%;
    }

    .feature-content {
        text-align: left;
    }

    .feature-title {
        font-size: 3rem;
    }

    .feature-desc {
        font-size: 1.125rem;
        margin-left: 0;
        margin-right: 0;
    }
}
/* ==========================================================================
   分类列表页 (Category Page) - 符合必应 Bing SEO 的现代化卡片布局
   ========================================================================== */
.category-main-wrapper {
    background-color: var(--bg-slate-50, #f8fafc);
    padding-top: 2rem;
    padding-bottom: 5rem;
    min-height: 70vh;
}

/* 面包屑导航 */
.breadcrumb-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-slate-500, #64748b);
    margin-bottom: 1.5rem;
}
.breadcrumb-nav a {
    color: var(--text-slate-600, #475569);
    text-decoration: none;
    transition: color 0.2s;
}
.breadcrumb-nav a:hover {
    color: var(--color-brand-purple, #6C3CE9);
}
.breadcrumb-nav .sep {
    color: var(--text-slate-400, #94a3b8);
}
.breadcrumb-nav .current {
    color: var(--text-slate-900, #0f172a);
    font-weight: 600;
}

/* 分类头部 Header 介绍区 */
.category-header-card {
    background: #ffffff;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    margin-bottom: 2.5rem;
    border-left: 5px solid var(--color-brand-purple, #6C3CE9);
}
.category-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-slate-900, #0f172a);
    margin: 0 0 0.75rem 0;
    letter-spacing: -0.025em;
}
.category-description {
    font-size: 1rem;
    color: var(--text-slate-600, #475569);
    line-height: 1.6;
    margin-bottom: 1.25rem;
}
.category-meta-info {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    font-size: 0.85rem;
    color: var(--text-slate-500, #64748b);
    padding-top: 0.75rem;
    border-top: 1px solid var(--bg-slate-100, #f1f5f9);
}

/* 文章网格 */
.post-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}
@media (min-width: 640px) {
    .post-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (min-width: 1024px) {
    .post-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.post-card {
    background: #ffffff;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.post-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}
.post-thumb-link {
    display: block;
    width: 100%;
    height: 180px;
    overflow: hidden;
    background-color: #f1f5f9;
}
.post-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}
.post-card:hover .post-thumb {
    transform: scale(1.05);
}
.post-card-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    justify-content: space-between;
}
.post-card-title {
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.4;
    margin: 0 0 0.75rem 0;
}
.post-card-title a {
    color: var(--text-slate-900, #0f172a);
    text-decoration: none;
    transition: color 0.2s;
}
.post-card-title a:hover {
    color: var(--color-brand-purple, #6C3CE9);
}
.post-card-excerpt {
    font-size: 0.875rem;
    color: var(--text-slate-600, #475569);
    line-height: 1.5;
    margin: 0 0 1.25rem 0;
}
.post-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-slate-400, #94a3b8);
    padding-top: 0.75rem;
    border-top: 1px solid #f8fafc;
}
.post-read-more {
    color: var(--color-brand-purple, #6C3CE9);
    font-weight: 600;
    text-decoration: none;
}

/* 无文章提示 */
.no-post-notice {
    text-align: center;
    padding: 4rem 1rem;
    background: #ffffff;
    border-radius: 1rem;
    color: var(--text-slate-500, #64748b);
}

/* 分页条适配 */
.pagination-wrapper {
    margin-top: 3rem;
    display: flex;
    justify-content: center;
}