/* ==========================================
   四海旅账官网 - 样式文件
   基于APP设计规范 (UI.rule.md)
   ========================================== */

/* CSS 变量定义 */
:root {
    /* 主色调 */
    --primary-blue: #4A90E2;
    --primary-blue-light: #6BA3E8;
    --primary-blue-dark: #3A7BC8;

    /* 辅助色 */
    --mint-green: #78D9C3;
    --coral-pink: #FFB7C5;
    --lemon-yellow: #FCE285;
    --vibrant-orange: #FF7A5A;

    /* 中性色 */
    --bg-main: #F3FAFF;
    --bg-white: #FFFFFF;
    --text-primary: #333333;
    --text-secondary: #8A8A8E;
    --border-color: #E5E5EA;

    /* 字体 */
    --font-main: 'Noto Sans SC', 'PingFang SC', -apple-system, BlinkMacSystemFont, sans-serif;

    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(74, 144, 226, 0.08);
    --shadow-md: 0 4px 16px rgba(74, 144, 226, 0.12);
    --shadow-lg: 0 8px 32px rgba(74, 144, 226, 0.16);

    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-main);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ==========================================
   导航栏
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(74, 144, 226, 0.1);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.logo-svg {
    width: 32px;
    height: 32px;
    color: var(--primary-blue);
    transition: var(--transition-normal);
}

.logo:hover .logo-svg {
    transform: rotate(-10deg) scale(1.1);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}


.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav-links a:hover {
    color: var(--primary-blue);
    background: rgba(74, 144, 226, 0.08);
}

.nav-links a.active {
    color: var(--primary-blue);
    font-weight: 700;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ==========================================
   Hero 区域
   ========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 200%;
    height: 200px;
    background: linear-gradient(180deg, transparent, rgba(74, 144, 226, 0.1));
    border-radius: 100% 100% 0 0;
}

.wave1 {
    animation: wave 8s infinite linear;
    opacity: 0.6;
}

.wave2 {
    animation: wave 12s infinite linear reverse;
    opacity: 0.4;
    bottom: 20px;
}

.wave3 {
    animation: wave 10s infinite linear;
    opacity: 0.2;
    bottom: 40px;
}

@keyframes wave {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.hero-title {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.title-main {
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--mint-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-sub {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 8px var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    color: white;
    box-shadow: 0 4px 16px rgba(74, 144, 226, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(74, 144, 226, 0.4);
}

.btn-harmony {
    background: linear-gradient(135deg, #000000, #333333);
    color: white;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.btn-harmony:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
}

.btn-white {
    background: white;
    color: var(--primary-blue);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.btn-white:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.btn-large {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
}

.apple-icon,
.harmony-icon {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

/* 手机模型 */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    position: relative;
    width: 280px;
    height: 580px;
    background: linear-gradient(145deg, #1a1a1a, #2d2d2d);
    border-radius: 44px;
    padding: 12px;
    box-shadow:
        0 30px 60px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--bg-main);
    border-radius: 36px;
    overflow: hidden;
    position: relative;
}

/* Phone Carousel */
.phone-carousel {
    width: 100%;
    height: 100%;
    position: relative;
}

.phone-carousel .carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.phone-carousel .carousel-slide.active {
    opacity: 1;
}

.carousel-dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.carousel-dots .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: background 0.3s, transform 0.3s;
}

.carousel-dots .dot.active {
    background: white;
    transform: scale(1.2);
}

.carousel-dots .dot:hover {
    background: rgba(255, 255, 255, 0.8);
}

.app-preview {
    height: 100%;
    padding: var(--spacing-md);
    padding-top: 50px;
}

.preview-header {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.preview-cards {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.preview-card {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    animation: cardFloat 3s ease-in-out infinite;
}

.preview-card.card-1 {
    animation-delay: 0s;
}

.preview-card.card-2 {
    animation-delay: 0.5s;
}

.preview-card.card-3 {
    animation-delay: 1s;
}

@keyframes cardFloat {

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

    50% {
        transform: translateY(-5px);
    }
}

.card-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-main);
    border-radius: var(--radius-sm);
    color: var(--primary-blue);
}

.card-icon svg {
    width: 28px;
    height: 28px;
}

.card-title {
    flex: 1;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.card-amount {
    font-weight: 700;
    color: var(--primary-blue);
    font-size: 0.9rem;
}

/* ==========================================
   功能特色
   ========================================== */
.features {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--bg-main);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: var(--transition-normal);
    border: 1px solid transparent;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(74, 144, 226, 0.2);
}

.feature-icon {
    margin-bottom: var(--spacing-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
}

.feature-icon svg {
    width: 48px;
    height: 48px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================
   产品亮点
   ========================================== */
.highlights {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(180deg, var(--bg-main), white);
}

.highlights-list {
    max-width: 800px;
    margin: 0 auto;
}

.highlight-item {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border-color);
}

.highlight-item:last-child {
    border-bottom: none;
}

.highlight-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    opacity: 0.3;
    line-height: 1;
    min-width: 60px;
}

.highlight-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.highlight-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================
   下载区域
   ========================================== */
.download {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--primary-blue), var(--mint-green));
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.download-content {
    position: relative;
    text-align: center;
    color: white;
}

.download-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.download-content p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-lg);
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.download .btn-white {
    background: white;
    color: var(--primary-blue);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
}

.download .btn-white:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 32px rgba(0, 0, 0, 0.3);
}

.download .apple-icon,
.download .harmony-icon {
    color: var(--primary-blue);
}

/* ==========================================
   页脚
   ========================================== */
/* ==========================================
   Footer / 页脚
   ========================================== */
.footer {
    padding: 80px 0 60px;
    background: #151516;
    color: #f5f5f7;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #f5f5f7;
    text-decoration: none;
}

.footer-brand .logo-svg {
    width: 32px;
    height: 32px;
    color: #f5f5f7;
}

.footer-copyright {
    font-size: 0.85rem;
    color: #86868b;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
    font-size: 0.8rem;
    color: #6e6e73;
    line-height: 1.5;
}

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

.footer-links a:hover {
    color: #f5f5f7;
    text-decoration: underline;
}

.footer-divider {
    display: inline-block;
    margin: 0 4px;
    opacity: 0.5;
    color: #424245;
}

.footer-contact {
    font-size: 1rem;
    color: #f5f5f7;
    margin-top: 8px;
}

.footer-contact a {
    color: #2997ff;
    text-decoration: none;
    transition: opacity 0.2s;
}

.footer-contact a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* ==========================================
   作品集首页 - Hero区域
   ========================================== */
.portfolio-hero {
    position: relative;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 72px;
    padding-bottom: var(--spacing-xl);
    overflow: hidden;
    text-align: center;
}

.portfolio-hero-content {
    position: relative;
    z-index: 1;
    padding: var(--spacing-xl) var(--spacing-md);
}

.portfolio-title {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.title-greeting {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.title-name {
    font-size: 4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--mint-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.portfolio-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.portfolio-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 500px;
    margin: 0 auto;
}

/* ==========================================
   APP 作品集展示
   ========================================== */
.app-showcase {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.app-card {
    display: block;
    text-decoration: none;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid rgba(255, 255, 255, 0.8);
    cursor: pointer;
    --app-theme: var(--primary-blue);
    height: 100%;
    position: relative;
}

/* 科技感装饰：左侧主题色指示线 */
.app-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 20%;
    width: 3px;
    height: 60%;
    background: linear-gradient(180deg, transparent, var(--app-theme), transparent);
    border-radius: 2px;
    opacity: 0.6;
    transition: all 0.4s ease;
}

/* 科技感装饰：顶部发光线条 */
.app-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 10%;
    right: 10%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(var(--app-theme-rgb), 0.5), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.app-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow:
        0 20px 40px rgba(var(--app-theme-rgb), 0.15),
        0 0 0 1px rgba(var(--app-theme-rgb), 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    border-color: rgba(var(--app-theme-rgb), 0.3);
}

.app-card:hover::before {
    opacity: 1;
    height: 80%;
    top: 10%;
    box-shadow: 0 0 12px rgba(var(--app-theme-rgb), 0.5);
}

.app-card:hover::after {
    opacity: 1;
}

.app-card-content {
    padding: var(--spacing-lg);
    padding-left: calc(var(--spacing-lg) + 8px);
    display: grid;
    grid-template-rows: auto auto auto auto 1fr auto;
    height: 100%;
    position: relative;
}

/* 科技感装饰：右上角圆点装饰 */
.app-card-content::before {
    content: '';
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--app-theme);
    opacity: 0.3;
    transition: all 0.3s ease;
}

.app-card:hover .app-card-content::before {
    opacity: 0.8;
    box-shadow: 0 0 8px rgba(var(--app-theme-rgb), 0.6);
}

.app-card-header {
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 14px;
}

.app-card-header .app-card-icon {
    margin-right: 0 !important;
}

.app-card-icon {
    width: 64px;
    height: 64px;
    border-radius: 14px;
    box-shadow:
        0 4px 12px rgba(0, 0, 0, 0.1),
        0 0 0 1px rgba(255, 255, 255, 0.5);
    margin-bottom: 0;
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.app-card:hover .app-card-icon {
    transform: scale(1.05);
    box-shadow:
        0 8px 20px rgba(var(--app-theme-rgb), 0.2),
        0 0 0 2px rgba(var(--app-theme-rgb), 0.15);
}

.app-card-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0 12px;
    height: 32px;
    line-height: 1;
    background: linear-gradient(135deg, rgba(var(--app-theme-rgb), 0.08), rgba(var(--app-theme-rgb), 0.04));
    color: var(--app-theme);
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(var(--app-theme-rgb), 0.15);
    border-radius: 20px;
    max-width: fit-content;
    margin: 16px 0 12px 0;
    white-space: normal;
    overflow: visible;
    text-overflow: unset;
    text-align: left;
    transition: all 0.3s ease;
    align-self: flex-start;
}

.app-card:hover .app-card-tag {
    background: linear-gradient(135deg, rgba(var(--app-theme-rgb), 0.15), rgba(var(--app-theme-rgb), 0.08));
    border-color: rgba(var(--app-theme-rgb), 0.3);
}

.app-card-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: 0.1em;
    transition: all 0.3s ease;
}

.app-card:hover .app-card-title {
    letter-spacing: 0.15em;
}

.app-card-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-family: 'SF Mono', 'Consolas', 'Courier New', monospace;
    margin-bottom: var(--spacing-sm);
    min-height: 1.2em;
    opacity: 0.7;
    letter-spacing: 0.05em;
}

.app-card-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.app-card-platforms {
    display: flex;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(var(--app-theme-rgb), 0.1);
}

.platform-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(var(--app-theme-rgb), 0.1), rgba(var(--app-theme-rgb), 0.05));
    color: var(--app-theme);
    border: 1px solid rgba(var(--app-theme-rgb), 0.15);
    transition: all 0.3s ease;
}

.platform-badge:hover {
    background: linear-gradient(135deg, rgba(var(--app-theme-rgb), 0.2), rgba(var(--app-theme-rgb), 0.1));
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(var(--app-theme-rgb), 0.2);
}

.platform-icon {
    width: 18px;
    height: 18px;
    color: currentColor;
}

.platform-icon-img {
    width: 18px;
    height: 18px;
    object-fit: contain;
}

/* APP 卡片特定颜色主题 */
.app-card-tripledger {
    background: linear-gradient(145deg, rgba(232, 244, 253, 0.9) 0%, rgba(255, 255, 255, 0.85) 100%);
    --app-theme: #4A90E2;
    --app-theme-rgb: 74, 144, 226;
}

.app-card-tripledger .app-card-title {
    color: var(--app-theme);
}

.app-card-fuyun {
    background: linear-gradient(145deg, rgba(255, 248, 240, 0.9) 0%, rgba(255, 255, 255, 0.85) 100%);
    --app-theme: #E68A00;
    --app-theme-rgb: 230, 138, 0;
}

.app-card-fuyun .app-card-title {
    color: var(--app-theme);
}

.app-card-groweather {
    background: linear-gradient(145deg, rgba(232, 248, 245, 0.9) 0%, rgba(255, 255, 255, 0.85) 100%);
    --app-theme: #26A69A;
    --app-theme-rgb: 38, 166, 154;
}

.app-card-groweather .app-card-title {
    color: var(--app-theme);
}

.app-card-tastyvocab {
    background: linear-gradient(145deg, rgba(255, 248, 240, 0.9) 0%, rgba(255, 255, 255, 0.85) 100%);
    --app-theme: #FF9800;
    --app-theme-rgb: 255, 152, 0;
}

.app-card-tastyvocab .app-card-title {
    color: var(--app-theme);
}

.app-card-wheremystuff {
    background: linear-gradient(145deg, rgba(255, 245, 238, 0.9) 0%, rgba(255, 255, 255, 0.85) 100%);
    --app-theme: #FF7A5A;
    --app-theme-rgb: 255, 122, 90;
}

.app-card-wheremystuff .app-card-title {
    color: var(--app-theme);
}

/* ==========================================
   响应式设计
   ========================================== */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text {
        order: 1;
    }

    .hero-image {
        order: 2;
    }

    .hero-buttons {
        justify-content: center;
    }

    .title-main {
        font-size: 2.5rem;
    }

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

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

    .app-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        gap: var(--spacing-sm);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .title-main {
        font-size: 2rem;
    }

    .title-sub {
        font-size: 1.125rem;
    }

    .hero-description {
        font-size: 1rem;
    }

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

    .section-title {
        font-size: 2rem;
    }

    .download-content h2 {
        font-size: 1.75rem;
    }

    .highlight-item {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .phone-mockup {
        width: 240px;
        height: 500px;
    }

    .title-name {
        font-size: 2.5rem;
    }

    .title-greeting {
        font-size: 1.25rem;
    }

    .portfolio-description {
        font-size: 1rem;
    }

    .app-card-title {
        font-size: 1.5rem;
    }

    .app-card-description {
        font-size: 0.9rem;
    }
}

/* ==========================================
   Lightbox / 图片灯箱
   ========================================== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-image {
    max-width: 100%;
    max-height: 90vh;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    object-fit: contain;
}

.lightbox-close {
    position: fixed;
    top: 20px;
    right: 30px;
    font-size: 40px;
    color: white;
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0.8;
    transition: opacity 0.2s;
    z-index: 10001;
}

.lightbox-close:hover {
    opacity: 1;
}

.lightbox-prev,
.lightbox-next {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    font-size: 32px;
    color: white;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    cursor: pointer;
    padding: 16px 20px;
    border-radius: 50%;
    opacity: 0.7;
    transition: opacity 0.2s, background 0.2s;
    z-index: 10001;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.2);
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

@media (max-width: 768px) {

    .lightbox-prev,
    .lightbox-next {
        padding: 12px 16px;
        font-size: 24px;
    }

    .lightbox-close {
        font-size: 32px;
        top: 15px;
        right: 20px;
    }
}

/* ==========================================
   Hero Contact / 首页顶部联系方式
   ========================================== */
.hero-contact {
    margin-top: 24px;
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #484848;
    text-decoration: none;
    font-size: 1rem;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 24px;
    transition: all 0.2s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    cursor: pointer;
    font-family: inherit;
}

.contact-link:hover {
    color: var(--primary-blue);
    background: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.contact-icon {
    width: 20px;
    height: 20px;
    opacity: 0.8;
}

.contact-link.is-copied {
    color: #0b8f5d;
    border-color: rgba(11, 143, 93, 0.25);
    background: rgba(232, 249, 241, 0.95);
}

/* ==========================================
   自媒体社交区域
   ========================================== */
.social-section {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(180deg, white, var(--bg-main));
}


.social-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.social-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 2px solid transparent;
    min-width: 0;
}

.social-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.social-card.social-xiaohongshu:hover {
    border-color: #FE2C55;
}

.social-card.social-bilibili:hover {
    border-color: #00A1D6;
}

.social-card.social-zhihu:hover {
    border-color: #0066FF;
}

.social-card.social-wechat:hover {
    border-color: #07C160;
}

.social-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.social-xiaohongshu .social-icon {
    background: linear-gradient(135deg, #FE2C55, #FF6B81);
    color: white;
}

.social-bilibili .social-icon {
    background: linear-gradient(135deg, #00A1D6, #00C9FF);
    color: white;
}

.social-zhihu .social-icon {
    background: linear-gradient(135deg, #0066FF, #0084FF);
    color: white;
}

.social-wechat .social-icon {
    background: linear-gradient(135deg, #07C160, #2DC84D);
    color: white;
}

.social-icon svg {
    width: 28px;
    height: 28px;
}

.social-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow: hidden;
}

.social-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.social-handle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.social-card.social-wechat {
    cursor: pointer;
}

/* 响应式调整 */
@media (max-width: 1024px) {
    .social-links {
        max-width: 700px;
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .app-grid {
        gap: var(--spacing-md);
        margin-top: var(--spacing-lg);
    }

    .app-card-content {
        padding: var(--spacing-md);
    }

    .app-card-header {
        gap: 12px;
        margin-bottom: 12px;
    }

    .app-card-tag {
        margin: 12px 0 6px 0;
        padding: 0;
        font-size: 0.82rem;
    }

    .app-card-title {
        font-size: 1.55rem;
        letter-spacing: 0.08em;
    }

    .app-card-description {
        font-size: 0.92rem;
        margin-bottom: var(--spacing-sm);
    }

    .logo {
        font-size: 1.2rem;
    }

    .social-links {
        grid-template-columns: 1fr;
        padding: 0 var(--spacing-sm);
    }

    .social-card {
        width: 100%;
    }
}

@media (max-width: 420px) {
    .app-card-content {
        padding: var(--spacing-md);
    }
}

/* 微信二维码模态框 */
.wechat-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.wechat-modal.active {
    display: flex;
}

.wechat-modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.wechat-modal-content {
    position: relative;
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalFadeIn 0.3s ease;
    max-width: 320px;
    width: 90%;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.wechat-modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-main);
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.wechat-modal-close:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.wechat-modal-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.wechat-modal-qr {
    width: 200px;
    height: 200px;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    object-fit: cover;
}

.wechat-modal-hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
}