/* ===========================
   无抵达 - 官方页面样式
   主题：温柔绿 + glassmorphism
   =========================== */

:root {
    /* 温柔绿主题色板 */
    --color-primary: #52B788;
    --color-primary-light: #7DD3C0;
    --color-primary-dark: #2D6A4F;
    --color-accent: #95D5B2;
    --color-mint: #B7E4C7;
    --color-cream: #F8FAF6;
    --color-white: #FFFFFF;

    /* 中性色 */
    --color-bg: #F7FAF7;
    --color-text: #1B2D20;
    --color-text-soft: #4A5C50;
    --color-text-muted: #8A9D90;
    --color-border: rgba(82, 183, 136, 0.15);

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #7DD3C0 0%, #52B788 50%, #2D6A4F 100%);
    --gradient-soft: linear-gradient(135deg, #B7E4C7 0%, #95D5B2 50%, #74C69D 100%);
    --gradient-warm: linear-gradient(135deg, #D8F3DC 0%, #B7E4C7 50%, #95D5B2 100%);
    --gradient-bg: linear-gradient(180deg, #F8FAF6 0%, #ECF7F0 50%, #E0F0E5 100%);

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(45, 106, 79, 0.06);
    --shadow-md: 0 8px 24px rgba(45, 106, 79, 0.08);
    --shadow-lg: 0 16px 48px rgba(45, 106, 79, 0.12);
    --shadow-glow: 0 0 40px rgba(82, 183, 136, 0.2);

    /* 玻璃拟态 */
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px rgba(45, 106, 79, 0.08);

    /* 字体 */
    --font-base: 18.5px;
    --font-heading: 36px;
    --font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', sans-serif;

    /* 圆角 */
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --radius-xl: 36px;

    /* 间距 */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 40px;
    --space-xl: 80px;
}

/* ===========================
   重置 & 基础
   =========================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-base);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--gradient-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    position: relative;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

ul {
    list-style: none;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    position: relative;
}

/* ===========================
   背景动效
   =========================== */
.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.bg-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.bg-orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #95D5B2 0%, transparent 70%);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.bg-orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #7DD3C0 0%, transparent 70%);
    bottom: -100px;
    left: -100px;
    animation-delay: -7s;
}

.bg-orb-3 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, #B7E4C7 0%, transparent 70%);
    top: 40%;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -50px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 30px) scale(0.95);
    }
}

/* ===========================
   玻璃拟态基础
   =========================== */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* ===========================
   渐变图标
   =========================== */
.icon-gradient-1 {
    background: linear-gradient(135deg, #7DD3C0 0%, #52B788 100%);
}

.icon-gradient-2 {
    background: linear-gradient(135deg, #95D5B2 0%, #74C69D 100%);
}

.icon-gradient-3 {
    background: linear-gradient(135deg, #B7E4C7 0%, #95D5B2 100%);
}

/* ===========================
   导航栏
   =========================== */
.navbar {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 32px);
    max-width: 1200px;
    border-radius: var(--radius-lg);
    z-index: 100;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    top: 8px;
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.logo-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.logo:hover .logo-icon {
    transform: rotate(15deg) scale(1.1);
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--color-text-soft);
    font-size: 15px;
    font-weight: 500;
    position: relative;
    padding: 6px 0;
}

.nav-links a:not(.nav-cta)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.nav-links a:not(.nav-cta):hover {
    color: var(--color-primary-dark);
}

.nav-links a:not(.nav-cta):hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--gradient-primary);
    color: white !important;
    padding: 8px 20px !important;
    border-radius: 100px;
    font-weight: 600 !important;
    box-shadow: 0 4px 12px rgba(82, 183, 136, 0.3);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(82, 183, 136, 0.4);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ===========================
   Hero 区域
   =========================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    position: relative;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary-dark);
    margin-bottom: 24px;
    animation: slideDown 0.8s ease;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(82, 183, 136, 0.7);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(82, 183, 136, 0.7);
    }
    70% {
        box-shadow: 0 0 0 12px rgba(82, 183, 136, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(82, 183, 136, 0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-size: 72px;
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -2px;
    color: var(--color-text);
    margin-bottom: 24px;
    animation: slideUp 0.8s ease 0.1s both;
}

.title-gradient {
    display: inline-block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}

.title-gradient::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 4px;
    opacity: 0.4;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: 20px;
    color: var(--color-text-soft);
    line-height: 1.7;
    margin-bottom: 36px;
    max-width: 540px;
    animation: slideUp 0.8s ease 0.2s both;
}

.hero-subtitle strong {
    color: var(--color-primary-dark);
    font-weight: 600;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    animation: slideUp 0.8s ease 0.3s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 100px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 8px 24px rgba(82, 183, 136, 0.35);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(82, 183, 136, 0.45);
}

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

.btn-ghost {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    color: var(--color-text);
    border: 1px solid var(--glass-border);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
    animation: slideUp 0.8s ease 0.4s both;
}

.stat {
    display: flex;
    align-items: baseline;
    gap: 2px;
}

.stat-num {
    font-size: 40px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}

.stat-plus {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-top: 4px;
    width: 100%;
    text-align: center;
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--color-border);
}

/* ===========================
   手机模型
   =========================== */
.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 1.2s ease 0.5s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.phone-mockup {
    position: relative;
    animation: floatY 6s ease-in-out infinite;
}

@keyframes floatY {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.phone-frame {
    width: 320px;
    height: 640px;
    background: linear-gradient(135deg, #1B2D20 0%, #2D6A4F 100%);
    border-radius: 48px;
    padding: 12px;
    box-shadow:
        0 50px 100px -20px rgba(45, 106, 79, 0.3),
        0 30px 60px -30px rgba(45, 106, 79, 0.4),
        inset 0 0 0 2px rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 2;
}

.phone-frame-small {
    width: 240px;
    height: 480px;
    border-radius: 36px;
    padding: 8px;
}

.phone-notch {
    position: absolute;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 28px;
    background: #1B2D20;
    border-radius: 20px;
    z-index: 3;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 36px;
    overflow: hidden;
    position: relative;
}

.phone-frame-small .phone-screen {
    border-radius: 28px;
}

.screen-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.phone-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(82, 183, 136, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 1;
    filter: blur(40px);
    animation: pulseGlow 4s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% {
        opacity: 0.6;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

/* 浮动卡片 */
.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    border-radius: var(--radius-md);
    z-index: 3;
    animation: floatCard 5s ease-in-out infinite;
}

.floating-card-1 {
    top: 15%;
    left: -10%;
    animation-delay: 0s;
}

.floating-card-2 {
    bottom: 20%;
    right: -8%;
    animation-delay: -2.5s;
}

@keyframes floatCard {
    0%, 100% {
        transform: translateY(0) rotate(-2deg);
    }
    50% {
        transform: translateY(-15px) rotate(2deg);
    }
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 12px rgba(82, 183, 136, 0.3);
}

.card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
}

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

/* ===========================
   通用 section
   =========================== */
section {
    padding: var(--space-xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--color-primary-dark);
    margin-bottom: 20px;
}

.section-title {
    font-size: var(--font-heading);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1.5px;
    color: var(--color-text);
    margin-bottom: 16px;
}

.section-desc {
    font-size: 18px;
    color: var(--color-text-soft);
    line-height: 1.6;
}

/* ===========================
   功能特性
   =========================== */
.features {
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(82, 183, 136, 0.08) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: 20px;
    box-shadow: 0 8px 20px rgba(82, 183, 136, 0.25);
    position: relative;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(-5deg);
}

.feature-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.feature-card p {
    font-size: 15px;
    color: var(--color-text-soft);
    line-height: 1.7;
}

/* ===========================
   应用截图
   =========================== */
.gallery {
    background: linear-gradient(180deg, transparent 0%, rgba(232, 244, 234, 0.5) 50%, transparent 100%);
}

.gallery-showcase {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    align-items: end;
}

.showcase-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    transition: transform 0.4s ease;
}

.showcase-item:nth-child(odd) {
    transform: translateY(-30px);
}

.showcase-item:nth-child(even) {
    transform: translateY(0);
}

.showcase-item:hover {
    transform: translateY(-10px) !important;
}

.showcase-item .phone-frame-small {
    box-shadow:
        0 30px 60px -10px rgba(45, 106, 79, 0.25),
        0 18px 36px -18px rgba(45, 106, 79, 0.3),
        inset 0 0 0 2px rgba(255, 255, 255, 0.1);
}

.showcase-label {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-soft);
    text-align: center;
}

/* ===========================
   关于我们
   =========================== */
.about-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image-card {
    border-radius: var(--radius-xl);
    padding: 16px;
    position: relative;
    overflow: hidden;
    aspect-ratio: 4 / 3;
}

.about-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
    transition: transform 0.6s ease;
}

.about-image-card:hover .about-img {
    transform: scale(1.05);
}

.about-img-overlay {
    position: absolute;
    top: 16px;
    left: 16px;
    right: 16px;
    bottom: 16px;
    background: linear-gradient(180deg, transparent 60%, rgba(45, 106, 79, 0.4) 100%);
    border-radius: var(--radius-lg);
    pointer-events: none;
}

.about-content .section-tag {
    margin-bottom: 16px;
}

.about-content .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.about-text {
    font-size: 17px;
    color: var(--color-text-soft);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-text strong {
    color: var(--color-primary-dark);
    font-weight: 600;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
}

.about-icon {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

/* ===========================
   下载预约
   =========================== */
.download {
    padding: 80px 0;
}

.download-card {
    border-radius: var(--radius-xl);
    padding: 80px 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.7) 0%, rgba(232, 244, 234, 0.7) 100%);
}

.download-bg-orb {
    position: absolute;
    top: -200px;
    right: -200px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(82, 183, 136, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
    filter: blur(40px);
}

.download-content {
    position: relative;
    z-index: 1;
}

.download-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -1.5px;
}

.download-desc {
    font-size: 18px;
    color: var(--color-text-soft);
    line-height: 1.7;
    margin-bottom: 40px;
}

.download-platforms {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.platform {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    border-radius: var(--radius-md);
    min-width: 200px;
}

.platform-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
}

.platform-info {
    text-align: left;
}

.platform-label {
    font-size: 12px;
    color: var(--color-text-muted);
    font-weight: 500;
}

.platform-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
}

.notify-form {
    display: flex;
    gap: 12px;
    max-width: 520px;
    margin: 0 auto 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    padding: 8px;
    border-radius: 100px;
    border: 1px solid var(--glass-border);
}

.notify-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 12px 20px;
    font-size: 15px;
    color: var(--color-text);
    font-family: inherit;
    outline: none;
}

.notify-input::placeholder {
    color: var(--color-text-muted);
}

.notify-form .btn {
    padding: 12px 24px;
    font-size: 15px;
}

.download-hint {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-top: 12px;
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: linear-gradient(180deg, transparent 0%, rgba(232, 244, 234, 0.5) 100%);
    padding: 60px 0 24px;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-tagline {
    font-size: 15px;
    color: var(--color-text-soft);
    margin-top: 12px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.footer-col a {
    display: block;
    font-size: 14px;
    color: var(--color-text-soft);
    margin-bottom: 10px;
    transition: all 0.2s ease;
}

.footer-col a:hover {
    color: var(--color-primary);
    transform: translateX(4px);
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

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

/* ===========================
   响应式
   =========================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 56px;
    }

    .section-title {
        font-size: 32px;
    }

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

    .gallery-showcase {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

    .showcase-item:nth-child(odd),
    .showcase-item:nth-child(even) {
        transform: none;
    }
}

@media (max-width: 768px) {
    :root {
        --base-font-size: 16px;
        --font-heading: 28px;
    }

    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-title {
        font-size: 42px;
        letter-spacing: -1px;
    }

    .hero-subtitle {
        font-size: 17px;
    }

    .hero-stats {
        gap: 16px;
    }

    .stat-num {
        font-size: 32px;
    }

    .floating-card {
        display: none;
    }

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

    .gallery-showcase {
        grid-template-columns: 1fr 1fr;
    }

    .about-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .download-card {
        padding: 50px 24px;
    }

    .download-title {
        font-size: 32px;
    }

    .notify-form {
        flex-direction: column;
        border-radius: var(--radius-md);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 34px;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        justify-content: center;
        width: 100%;
    }

    .gallery-showcase {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* ===========================
   滚动出现动画
   =========================== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 选中文字颜色 */
::selection {
    background: var(--color-primary);
    color: white;
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-cream);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 100px;
}

/* ===========================
   Toast 通知
   =========================== */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--gradient-primary);
    color: white;
    padding: 14px 24px;
    border-radius: 100px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    font-weight: 500;
    box-shadow: 0 12px 40px rgba(82, 183, 136, 0.4);
    z-index: 1000;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast-icon {
    width: 24px;
    height: 24px;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===========================
   滚动进度条
   =========================== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--gradient-primary);
    z-index: 9999;
    transition: width 0.1s ease-out;
    box-shadow: 0 0 12px rgba(82, 183, 136, 0.5);
}

/* ===========================
   移动端导航激活
   =========================== */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: 16px;
        right: 16px;
        flex-direction: column;
        background: var(--glass-bg);
        backdrop-filter: blur(20px);
        padding: 24px;
        border-radius: var(--radius-md);
        border: 1px solid var(--glass-border);
        box-shadow: var(--shadow-lg);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all 0.3s ease;
    }

    .nav-links.active {
        display: flex;
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .nav-links a {
        width: 100%;
        text-align: center;
        padding: 12px 0;
    }
}