/* ==========================================================
   墨语AI 官方网站样式表
   主色调：淡紫色渐变 (#A78BFA, #8B5CF6) + 粉色腮红 (#F9A8D4)
   ========================================================== */

/* ============ 变量与重置 ============ */
:root {
    /* 主色：紫色系 */
    --primary-50:  #F5F3FF;
    --primary-100: #EDE9FE;
    --primary-200: #DDD6FE;
    --primary-300: #C4B5FD;
    --primary-400: #A78BFA;
    --primary-500: #8B5CF6;
    --primary-600: #7C3AED;
    --primary-700: #6D28D9;

    /* 强调色：粉色腮红 */
    --accent-pink-100: #FCE7F3;
    --accent-pink-200: #FBCFE8;
    --accent-pink-300: #F9A8D4;
    --accent-pink-400: #F472B6;
    --accent-pink-500: #EC4899;

    /* 辅助色 */
    --accent-yellow: #FCD34D;

    /* 灰阶 */
    --gray-50:  #FAFAFA;
    --gray-100: #F4F4F5;
    --gray-200: #E4E4E7;
    --gray-300: #D4D4D8;
    --gray-400: #A1A1AA;
    --gray-500: #71717A;
    --gray-600: #52525B;
    --gray-700: #3F3F46;
    --gray-800: #27272A;
    --gray-900: #18181B;

    /* 背景与文字 */
    --bg-page: #FFFFFF;
    --bg-soft: #FAF8FF;
    --text-primary: var(--gray-800);
    --text-secondary: var(--gray-600);
    --text-tertiary: var(--gray-500);
    --text-inverse: #FFFFFF;

    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(139,92,246,0.08), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(139,92,246,0.12), 0 4px 6px -4px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(139,92,246,0.15), 0 8px 10px -6px rgba(139,92,246,0.1);
    --shadow-glow: 0 0 40px rgba(167,139,250,0.35);

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* 过渡 */
    --trans-fast: 0.15s cubic-bezier(0.4,0,0.2,1);
    --trans-base: 0.3s cubic-bezier(0.4,0,0.2,1);
    --trans-slow: 0.5s cubic-bezier(0.4,0,0.2,1);

    /* 宽度 */
    --container-w: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
}

ul { list-style: none; }
img { max-width: 100%; display: block; }

.section-container {
    max-width: var(--container-w);
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-tag {
    display: inline-block;
    padding: 6px 18px;
    background: var(--primary-100);
    color: var(--primary-600);
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-500) 50%, var(--accent-pink-500) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============ 顶部导航 ============ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--trans-base);
}

.navbar.scrolled {
    background: rgba(255,255,255,0.95);
    border-bottom: 1px solid var(--primary-100);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: var(--container-w);
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-300) 0%, var(--primary-500) 100%);
    box-shadow: 0 4px 12px rgba(139,92,246,0.25);
    flex-shrink: 0;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-600), var(--accent-pink-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 18px;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    transition: var(--trans-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-600);
    background: var(--primary-50);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-pink-400));
    border-radius: 2px;
    transition: var(--trans-base);
}

.nav-link:hover::after {
    width: 30px;
}

.nav-download-btn {
    padding: 10px 24px;
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    color: var(--text-inverse);
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 600;
    transition: var(--trans-base);
    box-shadow: 0 4px 14px rgba(139,92,246,0.35);
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
}

.nav-download-btn:hover {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(139,92,246,0.45);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    width: 24px;
    height: 2.5px;
    background: var(--primary-600);
    border-radius: 2px;
    transition: var(--trans-base);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
}

/* ============ 首屏 Hero ============ */
.hero {
    position: relative;
    min-height: 100vh;
    padding: 120px 0 80px;
    overflow: hidden;
    background: linear-gradient(180deg, var(--primary-50) 0%, #FFFFFF 60%, var(--bg-soft) 100%);
}

.hero-bg-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.hero-bg-decoration::before,
.hero-bg-decoration::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}

.hero-bg-decoration::before {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--primary-300) 0%, transparent 70%);
    top: -150px;
    right: -100px;
    animation: floatOrb 12s ease-in-out infinite;
}

.hero-bg-decoration::after {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent-pink-200) 0%, transparent 70%);
    bottom: 10%;
    left: -120px;
    animation: floatOrb 15s ease-in-out infinite reverse;
}

@keyframes floatOrb {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -40px) scale(1.05); }
    66% { transform: translate(-20px, 30px) scale(0.95); }
}

.hero-container {
    max-width: var(--container-w);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-left {
    animation: fadeInUp 0.8s ease-out;
}

.hero-brand {
    margin-bottom: 20px;
}

.hero-logo {
    width: 80px;
    height: 80px;
    border-radius: 24px;
    background: linear-gradient(135deg, var(--primary-300) 0%, var(--primary-500) 60%, var(--primary-600) 100%);
    box-shadow: 0 16px 40px rgba(139,92,246,0.35), var(--shadow-glow);
    padding: 2px;
}

.hero-title {
    font-size: clamp(42px, 6vw, 64px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 14px;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-500) 40%, var(--accent-pink-500) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(17px, 2.2vw, 22px);
    color: var(--primary-600);
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-description {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 28px;
    max-width: 540px;
}

.hero-version-info {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 32px;
}

.version-badge,
.update-date {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--primary-100);
    color: var(--primary-700);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 500;
}

.update-date {
    background: var(--accent-pink-100);
    color: #BE185D;
}

.version-badge strong,
.update-date strong {
    font-weight: 700;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 40px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    color: var(--text-inverse);
    border-radius: var(--radius-full);
    font-size: 16px;
    font-weight: 600;
    transition: var(--trans-base);
    box-shadow: 0 10px 28px rgba(139,92,246,0.4);
    border: none;
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    transform: translateY(-3px);
    box-shadow: 0 16px 38px rgba(139,92,246,0.5);
}

.hero-main-btn {
    font-size: 17px;
    padding: 17px 36px;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 26px;
    background: #FFFFFF;
    color: var(--primary-600);
    border: 2px solid var(--primary-200);
    border-radius: var(--radius-full);
    font-size: 16px;
    font-weight: 600;
    transition: var(--trans-base);
    cursor: pointer;
}

.btn-secondary:hover {
    background: var(--primary-50);
    border-color: var(--primary-400);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 28px;
    padding-top: 28px;
    border-top: 1px solid var(--primary-100);
}

.stat-item {
    text-align: left;
}

.stat-number {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary-700);
    line-height: 1;
    margin-bottom: 6px;
}

.stat-number span {
    font-size: 18px;
    color: var(--accent-pink-500);
    font-weight: 700;
}

.stat-label {
    font-size: 13px;
    color: var(--text-tertiary);
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 38px;
    background: var(--primary-100);
}

/* ============ 截图展示区 ============ */
.hero-right {
    display: flex;
    justify-content: center;
    animation: fadeInRight 0.9s ease-out;
}

.screenshot-showcase {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.screenshot-phone-frame {
    position: relative;
    width: 280px;
    height: 560px;
    background: linear-gradient(135deg, var(--primary-100), var(--accent-pink-100));
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 30px 60px -15px rgba(139,92,246,0.35), 0 0 80px rgba(167,139,250,0.25), inset 0 0 0 2px rgba(255,255,255,0.8);
    overflow: hidden;
    transform: perspective(1200px) rotateY(-5deg) rotateX(3deg);
    transition: var(--trans-slow);
}

.screenshot-phone-frame:hover {
    transform: perspective(1200px) rotateY(0) rotateX(0) scale(1.03);
}

.screenshot-main-img {
    width: 100%;
    height: 100%;
    border-radius: 30px;
    background: #fff;
    object-fit: cover;
    transition: opacity var(--trans-base);
    opacity: 0.9;
}

.phone-notch {
    position: absolute;
    top: 18px;
    left: 50%;
    transform: translateX(-50%);
    width: 90px;
    height: 26px;
    background: #1f1f1f;
    border-radius: 13px;
    z-index: 2;
}

.screenshot-thumbs {
    display: flex;
    gap: 14px;
}

.thumb-item {
    position: relative;
    width: 72px;
    height: 120px;
    border-radius: 16px;
    overflow: hidden;
    cursor: pointer;
    background: linear-gradient(135deg, var(--primary-50), var(--accent-pink-100));
    box-shadow: var(--shadow-md);
    transition: var(--trans-base);
    border: 2px solid transparent;
    opacity: 0.7;
    transform: translateY(0);
}

.thumb-item:hover,
.thumb-item.active {
    opacity: 1;
    transform: translateY(-6px);
    border-color: var(--primary-400);
    box-shadow: 0 12px 24px -6px rgba(139,92,246,0.35);
}

.thumb-item.active {
    border-color: var(--primary-500);
}

.thumb-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.thumb-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 6px 4px;
    background: linear-gradient(to top, rgba(124,58,237,0.95), transparent);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    text-align: center;
}

.floating-bubble {
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.9);
    box-shadow: 0 8px 20px rgba(139,92,246,0.15);
    animation: floatBubble 6s ease-in-out infinite;
}

.floating-bubble::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.8);
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.9), transparent 60%);
}

.bubble-1 {
    width: 24px;
    height: 24px;
    top: 8%;
    left: -10%;
    animation-delay: 0s;
}

.bubble-2 {
    width: 16px;
    height: 16px;
    top: 25%;
    right: -8%;
    animation-delay: 1.5s;
}

.bubble-3 {
    width: 20px;
    height: 20px;
    bottom: 18%;
    left: -6%;
    animation-delay: 3s;
}

@keyframes floatBubble {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0.9; }
    50% { transform: translateY(-18px) scale(1.1); opacity: 1; }
}

/* ============ 功能特色 ============ */
.features {
    padding: 100px 0;
    background: #FFFFFF;
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    padding: 36px 30px;
    background: #FFFFFF;
    border-radius: var(--radius-xl);
    border: 1px solid var(--primary-100);
    transition: var(--trans-base);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-50), var(--accent-pink-100));
    opacity: 0;
    transition: var(--trans-base);
    z-index: -1;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-300);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 22px;
    color: #fff;
    transition: var(--trans-base);
}

.feature-icon-1 { background: linear-gradient(135deg, var(--primary-400), var(--primary-600)); }
.feature-icon-2 { background: linear-gradient(135deg, var(--accent-pink-300), var(--accent-pink-500)); }
.feature-icon-3 { background: linear-gradient(135deg, #FCD34D, #F59E0B); }
.feature-icon-4 { background: linear-gradient(135deg, #34D399, #059669); }
.feature-icon-5 { background: linear-gradient(135deg, #60A5FA, #2563EB); }
.feature-icon-6 { background: linear-gradient(135deg, #FB923C, #EA580C); }

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

.feature-card h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 14.5px;
    line-height: 1.75;
    color: var(--text-secondary);
}

/* ============ 用户评价 ============ */
.reviews {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-soft) 0%, #FFFFFF 100%);
    position: relative;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.review-card {
    padding: 32px 30px;
    background: #FFFFFF;
    border-radius: var(--radius-xl);
    border: 1px solid var(--primary-100);
    box-shadow: var(--shadow-md);
    transition: var(--trans-base);
    position: relative;
}

.review-card::after {
    content: '“';
    position: absolute;
    top: 16px;
    right: 28px;
    font-size: 80px;
    font-family: Georgia, serif;
    color: var(--primary-100);
    line-height: 1;
    pointer-events: none;
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-300);
}

.review-rating {
    color: var(--accent-yellow);
    font-size: 18px;
    margin-bottom: 14px;
    letter-spacing: 2px;
}

.review-rating .star-half {
    background: linear-gradient(90deg, var(--accent-yellow) 50%, #E5E7EB 50%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.review-text {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 22px;
    position: relative;
    z-index: 1;
}

.reviewer {
    display: flex;
    align-items: center;
    gap: 14px;
}

.reviewer-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    flex-shrink: 0;
}

.reviewer-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.reviewer-role {
    font-size: 13px;
    color: var(--text-tertiary);
}

/* ============ 常见问题 ============ */
.faq {
    padding: 100px 0;
    background: #FFFFFF;
}

.faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    background: #FFFFFF;
    border: 1px solid var(--primary-100);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--trans-base);
}

.faq-item:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-md);
}

.faq-item.active {
    border-color: var(--primary-400);
    background: linear-gradient(135deg, #FFFFFF, var(--primary-50));
}

.faq-question {
    padding: 22px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    cursor: pointer;
    user-select: none;
}

.faq-question h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.5;
}

.faq-toggle {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--primary-100);
    color: var(--primary-600);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 600;
    transition: var(--trans-base);
    line-height: 1;
}

.faq-item.active .faq-toggle {
    background: var(--primary-500);
    color: #fff;
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 400px;
    padding: 0 28px 24px;
}

.faq-answer p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
}

.faq-answer p br {
    content: '';
    display: block;
    margin: 6px 0;
}

/* ============ 下载区域 ============ */
.download-section {
    padding: 80px 0 100px;
    background: linear-gradient(180deg, var(--bg-soft) 0%, var(--primary-50) 100%);
}

.download-card {
    position: relative;
    overflow: hidden;
    border-radius: 32px;
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 50%, #9333EA 100%);
    box-shadow: 0 30px 80px -20px rgba(139,92,246,0.55), var(--shadow-glow);
    z-index: 1;
}

.download-bg-glow {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.download-bg-glow::before,
.download-bg-glow::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.5;
}

.download-bg-glow::before {
    width: 400px;
    height: 400px;
    background: var(--accent-pink-400);
    top: -200px;
    right: -100px;
    animation: floatOrb 10s ease-in-out infinite;
}

.download-bg-glow::after {
    width: 300px;
    height: 300px;
    background: var(--primary-300);
    bottom: -150px;
    left: -80px;
    animation: floatOrb 12s ease-in-out infinite reverse;
}

.download-content {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 40px;
    padding: 56px 56px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.download-left {
    color: #fff;
}

.download-logo {
    width: 72px;
    height: 72px;
    border-radius: 20px;
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
    padding: 4px;
    margin-bottom: 20px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.download-left h2 {
    font-size: clamp(28px, 3.5vw, 38px);
    font-weight: 800;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

.download-left > p {
    font-size: 16px;
    opacity: 0.92;
    margin-bottom: 24px;
}

.download-info {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
}

.download-meta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 500;
    border: 1px solid rgba(255,255,255,0.15);
}

.download-right {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

.btn-download-main {
    width: 100%;
    max-width: 340px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 22px 32px;
    background: linear-gradient(135deg, #FFFFFF 0%, var(--primary-50) 100%);
    color: var(--primary-700);
    border-radius: var(--radius-xl);
    font-weight: 700;
    transition: var(--trans-base);
    box-shadow: 0 20px 50px -10px rgba(0,0,0,0.25);
    position: relative;
    overflow: hidden;
}

.btn-download-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
    transition: left 0.7s ease;
}

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

.btn-download-main:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 28px 60px -10px rgba(0,0,0,0.35);
}

.download-btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.download-btn-text strong {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.download-btn-text small {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-tertiary);
    margin-top: 3px;
    opacity: 0.85;
}

.download-note {
    font-size: 13px;
    color: rgba(255,255,255,0.8);
    text-align: center;
}

/* ============ 页脚 ============ */
.footer {
    background: var(--gray-900);
    color: #fff;
    padding: 56px 0 0;
}

.footer-container {
    max-width: var(--container-w);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 48px;
    padding-bottom: 40px;
}

.footer-left {
    max-width: 360px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.footer-logo-img {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    flex-shrink: 0;
}

.footer-brand-name {
    font-size: 18px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-300), var(--accent-pink-300));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    font-size: 14px;
    color: var(--gray-400);
    line-height: 1.7;
}

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

.footer-link-group h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
    color: #fff;
}

.footer-link-group a {
    display: block;
    color: var(--gray-400);
    font-size: 14px;
    padding: 5px 0;
    transition: var(--trans-fast);
}

.footer-link-group a:hover {
    color: var(--primary-300);
    transform: translateX(3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 22px 24px;
    text-align: center;
    max-width: var(--container-w);
    margin: 0 auto;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--gray-500);
}

/* ============ 动画 ============ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 50px;
        text-align: center;
    }

    .hero-left { max-width: 700px; margin: 0 auto; }
    .hero-description { margin-left: auto; margin-right: auto; }
    .hero-cta { justify-content: center; }
    .hero-version-info { justify-content: center; }
    .hero-stats { justify-content: center; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .download-content { grid-template-columns: 1fr; gap: 36px; padding: 48px 40px; }
    .download-info { justify-content: center; }
    .download-left { text-align: center; }
    .footer-container { grid-template-columns: 1fr; gap: 32px; }
    .footer-left { max-width: 100%; }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(20px);
        padding: 16px 24px 24px;
        gap: 4px;
        border-bottom: 1px solid var(--primary-100);
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: var(--trans-base);
    }

    .nav-menu.open {
        transform: translateY(0);
    }

    .nav-link {
        width: 100%;
        padding: 14px 18px;
        border-radius: var(--radius-md);
    }

    .nav-download-btn { display: none; }
    .hamburger { display: flex; }

    .hero { padding: 100px 0 60px; min-height: auto; }
    .hero-container { gap: 40px; }

    .hero-stats {
        gap: 18px;
        padding-top: 24px;
    }
    .stat-number { font-size: 22px; }
    .stat-number span { font-size: 14px; }
    .stat-divider { height: 30px; }

    .screenshot-phone-frame {
        width: 240px;
        height: 480px;
    }
    .thumb-item {
        width: 60px;
        height: 100px;
    }

    .features, .reviews, .faq { padding: 70px 0; }
    .section-header { margin-bottom: 40px; }
    .features-grid, .reviews-grid { grid-template-columns: 1fr; }

    .faq-question { padding: 18px 20px; }
    .faq-item.active .faq-answer { padding: 0 20px 20px; }
    .faq-question h3 { font-size: 15px; }

    .download-section { padding: 60px 0 70px; }
    .download-content { padding: 40px 24px; gap: 28px; }
    .btn-download-main { padding: 18px 24px; border-radius: var(--radius-lg); }
    .download-btn-text strong { font-size: 18px; }

    .footer { padding: 40px 0 0; }
    .footer-links { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}

@media (max-width: 480px) {
    .nav-container { height: 64px; }
    .nav-menu { top: 64px; }

    .hero { padding: 90px 0 50px; }
    .hero-title { font-size: 40px; }
    .hero-subtitle { font-size: 16px; }
    .hero-logo { width: 64px; height: 64px; border-radius: 18px; }
    .btn-primary, .btn-secondary { width: 100%; }
    .hero-stats {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        padding: 20px;
        background: rgba(255,255,255,0.6);
        border-radius: var(--radius-lg);
    }
    .stat-divider { width: 60px; height: 1px; }

    .screenshot-phone-frame {
        width: 210px;
        height: 420px;
        border-radius: 32px;
        transform: none;
    }
    .screenshot-phone-frame:hover { transform: scale(1.02); }

    .section-tag { font-size: 13px; }
    .feature-card { padding: 28px 22px; }
    .feature-icon { width: 56px; height: 56px; }

    .review-card { padding: 26px 22px; }

    .footer-links { grid-template-columns: 1fr; }
    .footer-container { gap: 28px; }

    .download-info { gap: 8px; }
    .download-meta { font-size: 12px; padding: 5px 12px; }
}