/* ============================================================
   GLOBAL DESIGN SYSTEM
   Qkinteq Official Website – Unified High-end UI
   ============================================================ */

/* ---- COLOR SYSTEM ---- */
:root {
    --primary: #7c3aed;
    --primary-soft: #ede9fe;
    --primary-gradient: linear-gradient(135deg, #6366f1, #ec4899);

    --bg: #f9fafb;
    --surface: rgba(255, 255, 255, 0.65);
    --surface-strong: rgba(255, 255, 255, 0.9);

    --text-main: #111827;
    --text-muted: #6b7280;

    --border: #e5e7eb;

    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 22px;

    --shadow-sm: 0 4px 16px rgba(0,0,0,0.06);
    --shadow-md: 0 12px 28px rgba(0,0,0,0.12);
    --shadow-lg: 0 20px 50px rgba(0,0,0,0.16);
}

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

body {
    font-family: system-ui, -apple-system, "SF Pro Text", Arial, sans-serif;
    color: var(--text-main);

    background:
        /* 顶部柔紫光 */
        radial-gradient(
            700px circle at 50% 0%,
            rgba(120, 91, 245, 0.20),
            transparent 75%
        ),

        /* 中部右侧淡粉光，避免中间太白 */
        radial-gradient(
            600px circle at 85% 55%,
            rgba(236, 72, 153, 0.12),
            transparent 80%
        ),

        /* 底部偏左的柔粉紫，让底部不再纯白 */
        radial-gradient(
            800px circle at 20% 100%,
            rgba(180, 120, 255, 0.15),
            transparent 80%
        ),

        #f9f9ff; /* 非纯白、带一点紫白感 */

    line-height: 1.65;
}





@keyframes fadeBody {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

.container {
    max-width: 1280px;
    width: 100%;
    margin: 0 auto;
    padding: 0 24px;
}

/* 大屏幕优化 */
@media (min-width: 1400px) {
    .container {
        max-width: 1400px;
        padding: 0 32px;
    }
}

/* 超大屏幕优化 */
@media (min-width: 1600px) {
    .container {
        max-width: 1600px;
        padding: 0 48px;
    }
}



/* ============================================================
   NAVIGATION
   ============================================================ */

/* header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(229,231,235,0.6);
} */
 header {
    position: sticky;
    top: 0;
    z-index: 50;

    /* 默认假玻璃 */
    backdrop-filter: none;
    -webkit-backdrop-filter: none;

    background: linear-gradient(
        180deg,
        rgba(255,255,255,0.92),
        rgba(255,255,255,0.85)
    );

    border-bottom: 1px solid rgba(229,231,235,0.6);
}


.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 0;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 18px;
    color: inherit;
    text-decoration: none;
    transition: opacity 0.2s;
    cursor: pointer;
    position: relative;
    z-index: 1;
}

.logo:hover {
    opacity: 0.8;
}

.logo:active {
    opacity: 0.7;
}

.logo-mark {
    width: 28px;
    height: 28px;
    border-radius: 999px;
    background: var(--primary-gradient);
}

.nav-links {
    display: flex;
    gap: 32px;
    font-size: 16px;
}

/* 导航栏响应式 */
@media (max-width: 720px) {
    .nav {
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .nav-left {
        width: 100%;
        justify-content: space-between;
        flex-wrap: wrap;
    }
    
    .nav-links {
        order: 3;
        width: 100%;
        justify-content: flex-start;
        gap: 20px;
        padding-top: 12px;
        border-top: 1px solid rgba(229,231,235,0.6);
        font-size: 15px;
    }
    
    .nav-cta {
        margin-left: auto;
    }
}

.nav-links a {
    color: var(--text-muted);
    transition: color 0.2s;
    position: relative;
    display: inline-block;
    padding-bottom: 4px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: #901b55;
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-links a:hover::after {
    transform: scaleX(1);
}

.nav-cta {
    padding: 8px 16px;
    border-radius: 999px;
    border: 1px solid var(--primary);
    color: var(--primary);
    font-size: 14px;
    transition: 0.2s;
}

.nav-cta:hover {
    background: var(--primary-soft);
}



/* ============================================================
   SECTION SYSTEM
   ============================================================ */

section {
    padding: 72px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

/* Product页面左对齐 */
body.product-page .section-header {
    text-align: left;
}

.section-header-center {
    text-align: center !important;
}

.section-kicker {
    color: var(--primary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 8px;
}

.section-title {
    font-size: 30px;
    font-weight: 700;
    margin-bottom: 8px;
}

.section-subtitle {
    font-size: 15px;
    color: var(--text-muted);
}


/* Divider */
.section-divider {
    width: 80px;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: 999px;
    margin: 28px auto 48px;
}



/* ============================================================
   BUTTONS
   ============================================================ */

.btn-primary {
    padding: 10px 20px;
    border-radius: 999px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    font-size: 14px;
    cursor: pointer;
    transition: 0.25s;
}

.btn-primary:hover {
    opacity: 0.92;
}

.btn-ghost {
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: white;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    transition: 0.25s;
}

.btn-ghost:hover {
    border-color: #c7d2fe;
    color: var(--primary);
}



/* ============================================================
   HERO (index)
   ============================================================ */

.hero {
    padding: 80px 0;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

/* Badge */
.badge {
    display: inline-flex;
    gap: 6px;
    align-items: center;
    padding: 4px 10px;
    font-size: 12px;
    border-radius: 999px;
    background: rgba(99,102,241,0.08);
    color: #4f46e5;
    margin-bottom: 16px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: #4f46e5;
}

.hero-title {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.22;
}

.hero-subtitle {
    color: var(--text-muted);
    font-size: 16px;
    margin-bottom: 24px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    margin-bottom: 20px;
}

.hero-meta {
    font-size: 14px;
    color: var(--text-muted);
}

.hero-avatar-circle {
    width: 46px;
    height: 46px;
    border-radius: 999px;
    overflow: hidden;        /* ⭐让图片自动裁成圆形 */
    background: none;        /* 取消原来的渐变背景 */
}

.hero-avatar-circle img.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;       /* ⭐保持图片比例、美观裁切 */
    display: block;
}

/* ============================================================
   HERO CHAT CARD (右侧聊天卡片)
   ============================================================ */

.hero-card {
    background: var(--surface-strong);
    backdrop-filter: blur(18px);
    border-radius: 22px;
    padding: 26px;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255,255,255,0.5);

    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.hero-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.12);
}

.hero-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.hero-avatar {
    display: flex;
    align-items: center;
    gap: 12px;
}

.hero-avatar-circle {
    width: 46px;
    height: 46px;
    border-radius: 999px;
    background: radial-gradient(circle at 30% 20%, #f9a8d4, #6366f1);
}

.hero-avatar-text .name {
    font-size: 16px;
    font-weight: 600;
}

.hero-avatar-text .role {
    font-size: 12px;
    color: var(--text-muted);
}

.hero-pill {
    background: var(--primary-soft);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
}

.hero-chat {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chat-bubble {
    padding: 14px 16px;
    border-radius: 16px;
    line-height: 1.55;
    font-size: 14px;
}

.chat-user {
    background: #eef2ff;
    align-self: flex-end;
    max-width: 85%;
}

.chat-ai {
    background: white;
    border: 1px solid var(--border);
    align-self: flex-start;
    max-width: 88%;
}

.chat-label {
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 6px;
}
/* ============================================================
   VISION SECTION (index)
   ============================================================ */

.vision-section {
    padding: 96px 0;
    position: relative;
}

.vision-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    align-items: center;
    gap: 64px;
}

/* 左侧视觉 */
.vision-visual {
    position: relative;
}

/* .vision-circle {
    width: 300px;
    height: 300px;
    background: var(--primary-gradient);
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.35;
    position: absolute;
    top: 40px;
    left: 20px;
} */
 .vision-circle {
    filter: none;

    background: radial-gradient(
        circle,
        rgba(124,58,237,0.18),
        rgba(124,58,237,0.08),
        transparent 70%
    );
}


.vision-circle-sm {
    width: 160px;
    height: 160px;
    background: var(--primary-gradient);
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.28;
    position: absolute;
    top: 200px;
    left: 140px;
}

/* 右侧文本 */
.vision-title {
    font-size: 32px;
    margin-bottom: 10px;
    font-weight: 700;
}

.vision-subtitle {
    color: var(--text-muted);
    font-size: 15px;
    margin-bottom: 32px;
}

.vision-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.vf-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    position: relative;
    padding-left: 0;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.vf-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary);
    transform: scaleY(0);
    transform-origin: top;
   transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.vf-item:hover::before {
    transform: scaleY(1);
}

.vf-item:hover {
    padding-left: 16px;
}

.vf-dot {
    display: none;
}

.vf-item h3 {
    font-size: 18px;
    margin-bottom: 4px;
}

.vf-item p {
    font-size: 15px;
    color: var(--text-muted);
}

/* 顶部愿景句 */
.vision-quote {
    text-align: center;
    font-size: 24px;
    font-weight: 600;
    margin-top: 80px;
    color: #111;
}



/* ============================================================
   PRODUCT PAGE
   ============================================================ */

.product-layout {
    display: grid;
    grid-template-columns: 1fr 0.9fr;
    gap: 40px;
    align-items: start;
}

.product-list li {
    padding: 8px 0 8px 6px;
    border-left: 3px solid transparent;
    transition: 0.25s;
    font-size: 15px;
}

.product-list li:hover {
    border-left-color: var(--primary);
    background: rgba(124,58,237,0.06);
    padding-left: 12px;
}

/* ========== 新 UI：Apple 风玻璃卡片 ========== */

/* ============================================================
   🌈 高级 Glow Glass 卡片（全新设计）
   ============================================================ */

.product-card {
    position: relative;

    /* 半透明玻璃背景 */
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(18px);

    /* 更现代的圆角（更柔软） */
    border-radius: 24px;

    padding: 36px 40px;
    border: 1px solid rgba(255, 255, 255, 0.9);

    /* 更轻盈柔和的阴影 */
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);

    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

/* 卡片 hover 变得更立体 */
.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.12);
}

/* 卡片左侧品牌色发光边线 */
.product-card::before {
    content: "";
    position: absolute;
    left: 0;
    top: 16px;
    bottom: 16px;
    width: 5px;

    border-radius: 6px;
    background: linear-gradient(
        to bottom,
        rgba(124, 58, 237, 0.9),
        rgba(236, 72, 153, 0.85)
    );

    box-shadow: 0 0 18px rgba(140, 80, 255, 0.45);
}

/* 标题更强、对齐更精致 */
.product-card h3 {
    font-size: 22px;
    margin-bottom: 16px;
    font-weight: 700;
    color: #111;
}

/* 正文排版更清晰 */
.product-card p {
    font-size: 15px;
    line-height: 1.7;
    color: #4b5563;
}

/* 列表格式更紧凑 */
.product-card p br {
    line-height: 0.6;
}



/* ============================================================
   FEATURE PAGE
   ============================================================ */

.enhanced-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 40px;
}

/* .enhanced-feature-card {
    background: var(--surface);
    backdrop-filter: blur(16px);
    padding: 32px 26px;
    border-radius: 18px;
    border: 1px solid rgba(255,255,255,0.4);
    box-shadow: var(--shadow-md);
   transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.enhanced-feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
} */

.enhanced-feature-card {
    /* ❌ 禁用默认 blur（关键） */
    backdrop-filter: none;
    -webkit-backdrop-filter: none;

    /* ✅ 假玻璃视觉 */
    background: linear-gradient(
        180deg,
        rgba(255,255,255,0.92),
        rgba(255,255,255,0.86)
    );

    padding: 32px 26px;
    border-radius: 18px;
    border: 1px solid rgba(255,255,255,0.55);

    /* 更轻的阴影 */
    box-shadow: 0 8px 22px rgba(0,0,0,0.08);

    /* ❌ 禁止 transition: all */
    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease,
        background 0.25s ease;
}
.enhanced-feature-card:hover {
    /* ⭐ hover 才启用 blur */
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);

    background: rgba(255,255,255,0.82);

    transform: translateY(-6px);
    box-shadow: 0 18px 45px rgba(0,0,0,0.12);
}
.feature-tag {
    background: var(--primary-soft);
    color: var(--primary);
}



.feature-tag {
    margin-top: 8px;
    font-size: 12px;
    color: var(--primary);
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--primary-soft);
}



/* ============================================================
   TIMELINE (index)
   ============================================================ */

.timeline-section {
    padding: 96px 0;
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item,
.tl-item {
    position: relative;
    padding-left: 26px;
}

.timeline-item .dot,
.tl-dot {
    width: 10px;
    height: 10px;
    background: #6366f1;
    border-radius: 999px;
    position: absolute;
    top: 6px;
    left: 0;
}

.timeline-item h3,
.tl-item h3 {
    font-size: 18px;
    margin-bottom: 6px;
}



/* ============================================================
   CONTACT PAGE
   ============================================================ */

.contact-row {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 8px;
    font-size: 14px;
    margin-bottom: 10px;
}

.contact-label {
    font-weight: 600;
    color: #4b5563;
}

.contact-value {
    color: var(--text-muted);
}

.email-link {
    color: var(--primary);
}

.email-link:hover {
    text-decoration: underline;
}



/* ============================================================
   FOOTER
   ============================================================ */

.footer {
    margin-top: 80px;
    padding: 70px 0 50px;
    background: #fafbfc;
    border-top: 1px solid rgba(0,0,0,0.06);
}

.footer-inner {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.footer-logo-text {
    font-size: 17px;
    font-weight: 700;
}

.footer-links {
    display: flex;
    gap: 26px;
}

.footer-links a {
    font-size: 14px;
    color: var(--text-muted);
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-divider {
    height: 1px;
    background: rgba(0,0,0,0.08);
    width: 100%;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-muted);
}

.footer-meta {
    opacity: 0.75;
}



/* ============================================================
   RESPONSIVE DESIGN
   ============================================================ */

/* 中等屏幕优化 */
@media (max-width: 1200px) {
    .container {
        padding: 0 20px;
    }
    
    .hero-inner {
        gap: 40px;
    }
    
    .vision-grid {
        gap: 60px;
    }
}

/* 平板和小屏幕 */
@media (max-width: 980px) {
    .container {
        padding: 0 20px;
    }
    
    .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 32px;
    }

    .hero-card {
        margin: 0 auto;
        max-width: 500px;
    }

    .vision-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 48px;
    }
    
    .vision-left-card {
        margin: 0 auto;
    }

    .product-layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .enhanced-features {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    
    .why-cards {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .why-card {
        width: calc(50% - 16px);
        min-width: 280px;
    }
}

/* 移动设备 */
@media (max-width: 720px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 15px;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 12px;
    }
    
    .hero-actions button {
        width: 100%;
    }

    .section-title {
        font-size: 24px;
    }

    .vision-title {
        font-size: 26px;
    }

    .vision-quote {
        font-size: 20px;
        padding: 0 16px;
    }
    
    .enhanced-features {
        grid-template-columns: 1fr;
    }
    
    .why-cards {
        flex-direction: column;
        align-items: stretch;
    }
    
    .why-card {
        width: 100%;
    }

    .footer-top {
        flex-direction: column;
        gap: 18px;
        align-items: flex-start;
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: 16px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}


/* ================= VISION SECTION（新版，无分割线） ================= */

.vision-section {
    padding: 140px 0 60px;
    position: relative;
    background: transparent;   /* 关键：不再覆盖 body 背景 */
    backdrop-filter: none;
}

/* 左侧光斑弱化到非常淡，只作为氛围，不会形成色块 */
.vision-visual {
    position: relative;
    height: 260px;
    opacity: 0.28;
}

.vision-circle {
    width: 260px;
    height: 260px;
    background: radial-gradient(circle, rgba(124,58,237,0.12), transparent 70%);
    border-radius: 50%;
    position: absolute;
    top: 20px;
    left: 30px;
    filter: blur(110px);
}

.vision-circle-sm {
    width: 160px;
    height: 160px;
    background: radial-gradient(circle, rgba(236,72,153,0.10), transparent 70%);
    border-radius: 50%;
    position: absolute;
    top: 160px;
    left: 120px;
    filter: blur(90px);
}

/* Vision 内容永远浮在最上层 */
.vision-content,
.vision-quote,
.vision-grid {
    position: relative;
    z-index: 2;
}

/* Layout 轻微调整，让左侧不空 */
.vision-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: center;
}

.vision-left-text {
    position: absolute;
    top: 40px;
    left: 0;
    width: 260px;
    padding-left: 10px;

    animation: fadeIn 0.8s ease;
}

.vision-left-text h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 14px;
    color: #2d2d45;
}

.vision-left-text p {
    font-size: 14px;
    line-height: 1.6;
    color: #6b7280;
    margin-bottom: 28px;
}

.vision-stats {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.vs-item h4 {
    font-size: 15px;
    font-weight: 600;
    color: #4f46e5;
}

.vs-item span {
    font-size: 13px;
    color: #6b7280;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
/* 左侧卡片（干净不受 blur 影响） */
.vision-left-card {
    background: rgba(255,255,255,0.55);
    backdrop-filter: blur(18px);
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.6);
    padding: 28px 32px;
    max-width: 480px;

    box-shadow: 0 8px 24px rgba(0,0,0,0.05);
    position: relative;
    z-index: 3; /* 保证不被紫色光圈压住 */
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.vision-left-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.12);
}

.vision-left-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
}

.vision-left-card .vlc-desc {
    font-size: 14px;
    color: #4b5563;
    line-height: 1.7;
    margin-bottom: 24px;
}

.vlc-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.vlc-item h4 {
    font-size: 15px;
    font-weight: 600;
    color: #4f46e5;
    margin-bottom: 4px;
}

.vlc-item p {
    font-size: 13px;
    color: #6b7280;
}


/* ===========================
   WHY SECTION — Modern Compact Cards
   =========================== */

.why-cards {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-top: 20px;
}

/* .why-card {
    width: 340px;                   
    min-height: 260px;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(14px);
    border-radius: 22px;
    padding: 32px 28px;
    box-shadow: 0 12px 32px rgba(0,0,0,0.07);
    transition: 0.25s ease;
    display: flex;
    flex-direction: column;
}

.why-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 48px rgba(0,0,0,0.08);
} */
.why-card {
    width: 340px;
    min-height: 260px;

    /* ❌ 禁用默认 blur */
    backdrop-filter: none;
    -webkit-backdrop-filter: none;

    background: linear-gradient(
        180deg,
        rgba(255,255,255,0.9),
        rgba(255,255,255,0.85)
    );

    border-radius: 22px;
    padding: 32px 28px;

    border: 1px solid rgba(255,255,255,0.6);

    box-shadow: 0 10px 26px rgba(0,0,0,0.08);

    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease,
        background 0.25s ease;

    display: flex;
    flex-direction: column;
}
.why-card:hover {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);

    background: rgba(255,255,255,0.84);

    transform: translateY(-6px);
    box-shadow: 0 20px 48px rgba(0,0,0,0.10);
}

/* 数字 */
.why-num {
    font-size: 22px;
    font-weight: 600;
    color: #6d5dfc;
    background: rgba(109, 93, 252, 0.15);
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}

/* 标题 */
.why-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #1f2937;
}

/* 文本 */
.why-card p {
    font-size: 14px;
    line-height: 1.7;
    color: #4b5563;
}

.mini-avatar {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    overflow: hidden;
}

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

/* ============================================================
   GLASS CARD (玻璃卡片样式，用于 “阶段 1 / 阶段 2 / 阶段 3”)
   ============================================================ */

/* .glass-card {
    background: rgba(255, 255, 255, 0.55);    
    backdrop-filter: blur(16px);              
    -webkit-backdrop-filter: blur(16px);

    border-radius: 24px;                     
    padding: 32px 28px;

    border: 1px solid rgba(255,255,255,0.65); 
    box-shadow: 0 10px 30px rgba(0,0,0,0.08); 

    transition: 0.3s ease;
} */

.glass-card {
    /* 假玻璃：不 blur 背景 */
    backdrop-filter: none;
    -webkit-backdrop-filter: none;

    background: linear-gradient(
        180deg,
        rgba(255,255,255,0.92),
        rgba(255,255,255,0.85)
    );

    border-radius: 24px;
    padding: 32px 28px;

    border: 1px solid rgba(255,255,255,0.65);

    /* 更轻的阴影 */
    box-shadow: 0 8px 24px rgba(0,0,0,0.07);

    /* 明确 transition，禁止 all */
    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease,
        background 0.25s ease;
}



/* .glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 38px rgba(0,0,0,0.12);
} */

.glass-card:hover {
    backdrop-filter: blur(12px);
    background: rgba(255,255,255,0.82);

    transform: translateY(-4px);
    box-shadow: 0 16px 38px rgba(0,0,0,0.12);
}

.glass-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #1f2937;
}

.glass-card p {
    font-size: 15px;
    line-height: 1.7;
    color: #4b5563;
}
.lang-btn {
  margin-right: 12px;
  padding: 6px 10px;
  font-size: 13px;
  background: transparent;
  border: 1px solid rgba(0,0,0,0.15);
  border-radius: 6px;
  cursor: pointer;
}

.lang-btn:hover {
  background: rgba(0,0,0,0.04);
}

.nav {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
}

.nav-center {
  display: flex;
  justify-content: center;  /* ⭐ 真正居中 */
  gap: 28px;
}

.nav-left {
  display: flex;
  align-items: center;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}








/* ============================================================
   📱 MOBILE PORTRAIT MODE (Final – Clean & Fast)
   ============================================================ */
@media (orientation: portrait) {

  /* 🔓 1. 解锁手机端宽度（核心） */
  /* .container {
    max-width: 100%;
    padding-left: 16px;
    padding-right: 16px;
  } */

  section .container {
  max-width: 100%;
  padding-left: 24px;
  padding-right: 24px;
}

  /* 2. 统一手机阅读逻辑 */
  section {
    padding: 56px 0;
  }

  body.product-page .section-header,
  body.feature-page .section-header {
    text-align: left;
  }

  .section-title {
    font-size: 24px;
    line-height: 1.3;
    max-width: 100%;
    word-break: break-word;
  }

  .section-subtitle {
    font-size: 14px;
  }

  /* 3. 性能兜底：禁用高成本效果 */
  .enhanced-feature-card,
  .why-card,
  .product-card,
  .glass-card,
  .hero-card {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;

    transform: none !important;
    box-shadow: var(--shadow-sm);

    transition: none !important;
  }

  /* 4. 卡片尺寸更适合竖屏 */
  .enhanced-feature-card,
  .why-card {
    padding: 24px 20px;
    border-radius: 18px;
  }

  .enhanced-feature-card p,
  .why-card p {
    font-size: 14px;
    line-height: 1.65;
  }
  /* Header 整体改为两行 */
  .nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  /* 第一行：logo + 语言 + CTA */
  .nav-left,
  .nav-right {
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .nav-left {
    justify-content: space-between;
  }

  .nav-right {
    justify-content: flex-end;
     margin-left: auto;
  }

  /* 第二行：主导航按钮 */
  .nav-center {
    display: flex;
    justify-content: space-between;
    gap: 12px;

    padding-top: 10px;
    margin-top: 4px;
    border-top: 1px solid rgba(0,0,0,0.08);

    font-size: 14px;
  }

  .nav-center a {
    flex: 1;
    text-align: center;
    white-space: nowrap;
  }

  /* CTA 不要太大 */
  .nav-cta {
    padding: 6px 12px;
    font-size: 13px;
  }
  .vision-grid,
  .product-layout,
  .hero-inner,
  .enhanced-features {
    display: grid;
    grid-template-columns: 1fr !important;
    gap: 32px;
  }
  .why-card,
  .enhanced-feature-card,
  .glass-card {
    margin-left: auto;
    margin-right: auto;
  }
}