/* ======================== 全局样式 ======================== */
:root {
    --purple-primary: #6f42c1;
    --purple-dark: #4a2c82;
    --gradient-success: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-purple: #5a3e8e;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    overflow-x: hidden;
}

/* ======================== 导航栏样式 ======================== */
.bg-dark-purple {
    background-color: var(--bg-purple) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
}

.navbar-brand-img {
    height: 40px;
}

/* ======================== 语言切换开关 ======================== */
.lang-switch-wrapper {
    display: flex;
    align-items: center;
}

.lang-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    cursor: pointer;
}

.lang-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.lang-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 24px;
    transition: all 0.3s ease;
}

.lang-slider::before {
    content: "";
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: #fff;
    border-radius: 50%;
    transition: all 0.3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.lang-switch input:checked + .lang-slider {
    background-color: #667eea;
}

.lang-switch input:checked + .lang-slider::before {
    transform: translateX(20px);
}

.lang-label {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s ease;
    user-select: none;
}

.lang-switch input:checked ~ .lang-label:last-child,
.lang-switch:not(:checked) ~ .lang-label:first-child {
    color: #fff;
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: color 0.2s ease;
}

.navbar-dark .navbar-nav .nav-link:hover {
    color: #fff;
}

.dropdown-compact {
    min-width: 260px;
    max-width: 320px;
    padding: 0.75rem 1rem;
    margin-top: 0.5rem;
    border: none;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
    background: #fff;
}

.dropdown-compact.support-menu {
    min-width: 240px;
    max-width: 280px;
}

.dropdown-megamenu {
    width: 780px;
    max-width: 95vw;
    padding: 1rem 1.25rem;
    margin-top: 0.5rem;
    border: none;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
    background: #fff;
}

.dropdown-megamenu .col-lg-4 {
    min-width: 240px;
    padding: 0 0.75rem;
}

.megamenu-dropdown {
    position: static;
}

.dropdown-megamenu .dropdown-item {
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.85rem;
    color: #333;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dropdown-megamenu .dropdown-item:hover {
    background-color: #f0e6ff;
    color: var(--purple-primary);
    padding-left: 0.75rem;
}

.dropdown-megamenu .dropdown-item i {
    width: 16px;
    text-align: center;
    color: #888;
    font-size: 0.8rem;
    flex-shrink: 0;
}

.dropdown-megamenu .dropdown-item:hover i {
    color: var(--purple-primary);
}

.dropdown-megamenu .dropdown-header {
    color: var(--purple-primary);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.8px;
    padding: 0.5rem 0.75rem 0.2rem;
    margin-bottom: 0.15rem;
}

.dropdown-animate {
    animation: dropdownPop 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    transform-origin: top center;
}

@keyframes dropdownPop {
    0% {
        opacity: 0;
        transform: translateY(-8px) scale(0.96);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.dropdown-compact .dropdown-item {
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.875rem;
    color: #333;
    transition: all 0.15s ease;
}

.dropdown-compact .dropdown-item:hover {
    background-color: #f0e6ff;
    color: var(--purple-primary);
    padding-left: 1rem;
}

.dropdown-compact .dropdown-header {
    color: var(--purple-primary);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.8px;
    padding: 0.5rem 0.75rem 0.2rem;
    margin-bottom: 0.15rem;
}

.dropdown-menu-lg {
    min-width: 280px;
    padding: 0.75rem 0;
}

/* ======================== Hero 区域 ======================== */
.bg-gradient-success {
    background: var(--gradient-success);
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}

.section-header h1 {
    font-size: 5rem;
    letter-spacing: -1px;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.6), 0 0 20px rgba(255, 255, 255, 0.4), 0 0 30px rgba(255, 255, 255, 0.2);
    animation: textGlow 2s ease-in-out infinite alternate;
}

@keyframes textGlow {
    from {
        text-shadow: 0 0 10px rgba(255, 255, 255, 0.6), 0 0 20px rgba(255, 255, 255, 0.4), 0 0 30px rgba(255, 255, 255, 0.2);
    }
    to {
        text-shadow: 0 0 15px rgba(255, 255, 255, 0.8), 0 0 30px rgba(255, 255, 255, 0.6), 0 0 45px rgba(255, 255, 255, 0.4), 0 0 60px rgba(255, 255, 255, 0.2);
    }
}

.section-header h2 {
    font-size: 2.5rem;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.5), 0 0 16px rgba(255, 255, 255, 0.3);
    animation: subtitleGlow 2.5s ease-in-out infinite alternate;
}

@keyframes subtitleGlow {
    from {
        text-shadow: 0 0 8px rgba(255, 255, 255, 0.5), 0 0 16px rgba(255, 255, 255, 0.3);
    }
    to {
        text-shadow: 0 0 12px rgba(255, 255, 255, 0.7), 0 0 24px rgba(255, 255, 255, 0.5), 0 0 36px rgba(255, 255, 255, 0.3);
    }
}

.wave-divider {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    line-height: 0;
}

.wave-divider svg {
    display: block;
    width: 100%;
    height: 80px;
}

/* ======================== 截图展示区 ======================== */
.screenshot-section {
    margin-top: -8rem;
    position: relative;
    z-index: 10;
    padding-bottom: 3rem;
}

.screenshot-img {
    border-radius: 0.75rem;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

/* ======================== 通用 Section ======================== */
.section {
    padding: 5rem 0;
}

.section-lg {
    padding: 6rem 0;
}

/* ======================== 图标盒子 ======================== */
.icon-box {
    transition: transform 0.3s ease;
}

.icon-box:hover {
    transform: translateY(-5px);
}

/* ======================== Badge 样式 ======================== */
.bg-purple {
    background-color: var(--purple-primary) !important;
}

/* ======================== 按钮样式 ======================== */
.btn {
    border-radius: 50px;
    padding: 0.5rem 1.25rem;
    font-weight: 500;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease, opacity 0.4s ease;
    opacity: 0;
}

.btn:active::after {
    width: 300px;
    height: 300px;
    opacity: 1;
    transition: 0s;
}

.btn:active {
    transform: scale(0.95);
}

.btn-dribbble {
    background-color: #ea4c89;
    border-color: #ea4c89;
    color: #fff;
}

.btn-dribbble:hover {
    background-color: #d93a75;
    border-color: #d93a75;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(234, 76, 137, 0.4);
}

.btn-instagram {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    border: none;
    color: #fff;
}

.btn-instagram:hover {
    opacity: 0.9;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 39, 67, 0.4);
}

.btn-twitter {
    background-color: #1da1f2;
    border-color: #1da1f2;
    color: #fff;
}

.btn-twitter:hover {
    background-color: #0d95e8;
    border-color: #0d95e8;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(29, 161, 242, 0.4);
}

.btn-github {
    background-color: #333;
    border-color: #333;
    color: #fff;
}

.btn-github:hover {
    background-color: #222;
    border-color: #222;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(51, 51, 51, 0.4);
}

.btn-orange {
    background-color: #fd7e14;
    border-color: #fd7e14;
    color: #fff;
}

.btn-orange:hover {
    background-color: #e96b0a;
    border-color: #e96b0a;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(253, 126, 20, 0.4);
}

.btn-purple {
    background-color: var(--purple-primary);
    border-color: var(--purple-primary);
    color: #fff;
}

.btn-purple:hover {
    background-color: var(--purple-dark);
    border-color: var(--purple-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(111, 66, 193, 0.4);
}

/* ======================== 卡片样式 ======================== */
.card {
    border: none;
    border-radius: 0.75rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15) !important;
}

.card-img-top {
    border-top-left-radius: 0.75rem;
    border-top-right-radius: 0.75rem;
}

/* ======================== 轮播图样式 ======================== */
#mainCarousel .carousel-inner {
    border-radius: 0.75rem;
    overflow: hidden;
}

#mainCarousel .carousel-item img {
    height: 400px;
    object-fit: cover;
}

/* ======================== GitHub 图标 ======================== */
.github-icon {
    opacity: 0.3;
}

/* ======================== 页脚样式 ======================== */
.footer {
    background: linear-gradient(135deg, #2d1b4e 0%, #1a1a2e 100%);
}

.footer a {
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer a:hover {
    color: #fff !important;
}

.footer-logo-text {
    font-size: 1.25rem;
}

/* ======================== 手风琴样式 ======================== */
.accordion-item {
    border: none;
    margin-bottom: 0.5rem;
    border-radius: 0.5rem !important;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.accordion-button:not(.collapsed) {
    background-color: #f0e6ff;
    color: var(--purple-primary);
}

.accordion-button:focus {
    box-shadow: 0 0 0 0.25rem rgba(111, 66, 193, 0.25);
    border-color: transparent;
}

/* ======================== 响应式调整 ======================== */
@media (max-width: 991.98px) {
    .section-header h1 {
        font-size: 3.5rem;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    .bg-gradient-success {
        min-height: 60vh;
    }

    .screenshot-section {
        margin-top: -4rem;
    }

    #mainCarousel .carousel-item img {
        height: 250px;
    }

    .dropdown-megamenu {
        max-width: 100%;
        padding: 1rem;
    }
}

@media (max-width: 767.98px) {
    .section {
        padding: 3rem 0;
    }

    .section-lg {
        padding: 4rem 0;
    }

    .section-header h1 {
        font-size: 2.8rem;
    }

    .bg-gradient-success {
        min-height: 50vh;
        padding-top: 6rem;
    }
}

/* ======================== 动画效果 ======================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease-out;
}

/* ======================== 辅助类 ======================== */
.opacity-25 {
    opacity: 0.25 !important;
}

.text-purple {
    color: var(--purple-primary) !important;
}

.bg-purple-light {
    background-color: #f5f0ff !important;
}