/* ============================================================
   胖宝官网 · Apple风格简洁科技
   配色：白底 + 蓝点缀
   设计意图：干净、大气、产品导向
   ============================================================ */

:root {
    /* 背景层 */
    --bg: #ffffff;
    --bg-soft: #f5f7fa;
    --bg-card: #f0f4f8;
    --bg-elev: #e8eef5;

    /* 文字层 */
    --text: #1a1a2e;
    --text-mute: #64748b;
    --text-dim: #94a3b8;

    /* 边框 */
    --border: rgba(0, 0, 0, 0.06);
    --border-strong: rgba(0, 0, 0, 0.10);
    --border-accent: rgba(37, 99, 235, 0.25);

    /* 强调色 */
    --accent: #2563eb;
    --accent-dim: rgba(37, 99, 235, 0.08);
    --accent-glow: rgba(37, 99, 235, 0.25);

    /* 排版 scale */
    --fs-hero: clamp(36px, 6vw, 64px);
    --fs-h2: clamp(28px, 4vw, 48px);
    --fs-h3: 22px;
    --fs-lead: clamp(17px, 1.8vw, 21px);
    --fs-body: 16px;
    --fs-small: 14px;
    --fs-micro: 12px;

    /* 节奏 */
    --section-py: clamp(80px, 10vw, 140px);
    --container-pad: 24px;
    --max-w: 1200px;
    --radius: 20px;
    --radius-sm: 12px;

    /* 缓动 */
    --ease: cubic-bezier(.22, .61, .36, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Geist', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    font-size: var(--fs-body);
    overflow-x: hidden;
}

::selection {
    background: var(--accent);
    color: #fff;
}

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

/* ============================================================
   导航栏
   ============================================================ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background: rgba(255, 255, 255, .72);
    border-bottom: 1px solid var(--border);
}

.nav-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 14px 24px;
    max-width: var(--max-w);
    margin: 0 auto;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    color: var(--text);
}

.brand-logo {
    height: 32px;
    width: auto;
    display: block;
}

.brand-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: -.01em;
    line-height: 1;
    display: inline-flex;
    align-items: center;
}

.brand-text-logo {
    height: 28px;
    width: auto;
    display: block;
}

.primary-nav {
    display: flex;
    gap: 32px;
}

.primary-nav a {
    color: var(--text-mute);
    font-size: 14px;
    font-weight: 500;
    transition: color .2s var(--ease);
}

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

/* ============================================================
   按钮
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 999px;
    font-size: 16px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    border: none;
    transition: all .25s var(--ease);
    text-decoration: none;
    white-space: nowrap;
}

.btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    font-weight: 600;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px var(--accent-glow);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border-strong);
}

.btn-ghost:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-dim);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 18px;
}

/* ============================================================
   Hero（全屏大图+文字叠加）
   ============================================================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 80px;
    background:
        radial-gradient(ellipse 80% 50% at 50% -10%, rgba(37, 99, 235, .35) 0%, transparent 60%),
        radial-gradient(ellipse 50% 30% at 20% 80%, rgba(37, 99, 235, .08) 0%, transparent 50%),
        radial-gradient(ellipse 50% 30% at 80% 80%, rgba(59, 130, 246, .08) 0%, transparent 50%),
        linear-gradient(180deg, #070f1d 0%, #0d1d35 50%, #070f1d 100%);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
    background-size: 80px 80px;
    z-index: 0;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 45%;
    background: radial-gradient(ellipse 60% 100% at 50% 100%, rgba(37, 99, 235, .1) 0%, transparent 70%);
    z-index: 0;
    pointer-events: none;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-bg video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(7, 15, 29, .25) 0%,
        rgba(7, 15, 29, .45) 50%,
        rgba(7, 15, 29, .65) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    max-width: 900px;
    padding: 0 24px;
}

.hero-label {
    display: inline-block;
    font-size: var(--fs-micro);
    font-weight: 600;
    letter-spacing: .15em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, .75);
    margin-bottom: 24px;
    padding: 6px 16px;
    border: 1px solid rgba(255, 255, 255, .25);
    border-radius: 999px;
}

.hero-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.hero-title-line1 {
    font-size: var(--fs-hero);
    font-weight: 700;
    letter-spacing: -.03em;
    color: #fff;
    line-height: 1.1;
}

.hero-title-line2 {
    font-size: clamp(24px, 4vw, 42px);
    font-weight: 500;
    letter-spacing: .02em;
    color: rgba(255, 255, 255, .9);
    line-height: 1.25;
}

.hero-subtitle {
    font-size: clamp(18px, 2.5vw, 28px);
    font-weight: 400;
    color: rgba(255, 255, 255, .9);
    margin-bottom: 16px;
}

.hero-slogan {
    font-size: clamp(15px, 1.8vw, 20px);
    color: rgba(255, 255, 255, .75);
    line-height: 1.7;
    margin-bottom: 40px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-cta .btn-primary {
    background: #fff;
    color: var(--text);
}

.hero-cta .btn-primary:hover {
    background: rgba(255, 255, 255, .9);
    box-shadow: 0 12px 40px rgba(0, 0, 0, .25);
}

.hero-cta .btn-ghost {
    border-color: rgba(255, 255, 255, .4);
    color: #fff;
}

.hero-cta .btn-ghost:hover {
    background: rgba(255, 255, 255, .1);
    border-color: #fff;
}

/* ============================================================
   通用 Section
   ============================================================ */

.section {
    padding: var(--section-py) 0;
}

.section-alt {
    background: var(--bg-soft);
}

.section-head {
    text-align: center;
    margin-bottom: 64px;
}

.section-head h2 {
    font-size: var(--fs-h2);
    font-weight: 600;
    letter-spacing: -.025em;
    margin-bottom: 16px;
}

.section-head p {
    color: var(--text-mute);
    font-size: var(--fs-lead);
    max-width: 640px;
    margin: 0 auto;
}

.product-section-bg {
    position: relative;
    background: url('images/product-hero.jpg?v=3') center/cover no-repeat;
    padding: 120px 0;
}

.product-bg-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(7, 15, 29, .70) 0%,
        rgba(7, 15, 29, .55) 50%,
        rgba(7, 15, 29, .70) 100%
    );
    z-index: 0;
}

.product-head-light h2 {
    color: #fff;
}

.product-head-light p {
    color: rgba(255, 255, 255, .85);
}

/* 产品展示 */
.product-showcase {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.product-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.product-item.reverse {
    direction: rtl;
}

.product-item.reverse > * {
    direction: ltr;
}

.product-img-wrap {
    background: #f6f8fb;
    border-radius: 20px;
    padding: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-img-wrap img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
}

.product-info h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 12px;
}

.product-info p {
    color: var(--text-mute);
    font-size: 17px;
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-info ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.product-info ul li {
    font-size: 15px;
    color: var(--text-body);
    padding-left: 24px;
    position: relative;
}

.product-info ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

@media (max-width: 768px) {
    .product-item,
    .product-item.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }
    .product-item.reverse > * {
        direction: ltr;
    }
    .product-info h3 {
        font-size: 22px;
    }
}

/* ============================================================
   产品定位
   ============================================================ */

.manifesto-text {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.manifesto-text h2 {
    font-size: var(--fs-h2);
    font-weight: 600;
    letter-spacing: -.025em;
    margin-bottom: 24px;
}

.manifesto-text p {
    font-size: var(--fs-lead);
    color: var(--text-mute);
    line-height: 1.75;
}

/* ============================================================
   产品形态
   ============================================================ */

.model-grid {
    display: flex;
    flex-direction: column;
    gap: 64px;
    max-width: 1000px;
    margin: 0 auto;
}

.model-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px;
    overflow: hidden;
}

.model-card.reverse {
    direction: rtl;
}

.model-card.reverse > * {
    direction: ltr;
}

.model-media {
    border-radius: calc(var(--radius) - 8px);
    overflow: hidden;
    background: var(--bg-soft);
}

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

.model-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.model-tag {
    display: inline-block;
    align-self: flex-start;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--accent);
    background: rgba(37, 99, 235, .08);
    padding: 4px 12px;
    border-radius: 999px;
}

.model-body h3 {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -.02em;
}

.model-desc {
    font-size: 16px;
    color: var(--text-mute);
    line-height: 1.7;
}

.model-specs {
    list-style: none;
    padding: 0;
    margin: 8px 0 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.model-specs li {
    font-size: 15px;
    color: var(--text);
    padding-left: 24px;
    position: relative;
}

.model-specs li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

/* ============================================================
   适用场景
   ============================================================ */

.scene-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.scene-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: all .25s var(--ease);
}

.scene-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, .06);
    border-color: var(--border-accent);
}

.scene-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.scene-card h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.scene-card p {
    font-size: 14px;
    color: var(--text-mute);
    line-height: 1.6;
}

/* ============================================================
   核心卖点卡片
   ============================================================ */

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 28px;
    text-align: center;
    transition: all .3s var(--ease);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, .08);
    border-color: var(--border-accent);
}

.feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 24px;
    background: var(--accent-dim);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 15px;
    color: var(--text-mute);
    line-height: 1.65;
}

/* ============================================================
   产品价格
   ============================================================ */

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 840px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px 40px;
    text-align: center;
    transition: all .3s var(--ease);
}

.pricing-card:hover {
    border-color: var(--border-accent);
    box-shadow: 0 20px 60px rgba(0, 0, 0, .06);
}

.pricing-card.popular {
    border-color: var(--accent);
    position: relative;
}

.pricing-card.popular::before {
    content: '推荐';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--accent);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 16px;
    border-radius: 999px;
}

.pricing-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 8px;
}

.pricing-card .price {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 700;
    letter-spacing: -.03em;
    color: var(--text);
    margin-bottom: 8px;
}

.pricing-card .price-unit {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-mute);
}

.pricing-card .price-note {
    font-size: 14px;
    color: var(--text-dim);
    margin-bottom: 32px;
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin-bottom: 32px;
    text-align: left;
}

.pricing-features li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    font-size: 15px;
    color: var(--text-mute);
    display: flex;
    align-items: center;
    gap: 10px;
}

.pricing-features li::before {
    content: '✓';
    color: var(--accent);
    font-weight: 700;
    flex-shrink: 0;
}

.pricing-phone {
    text-align: center;
    margin-top: 48px;
}

.pricing-phone p {
    color: var(--text-mute);
    font-size: 16px;
    margin-bottom: 8px;
}

.pricing-phone a {
    font-size: clamp(24px, 3vw, 36px);
    font-weight: 700;
    color: var(--accent);
    letter-spacing: .02em;
}

.pricing-phone a:hover {
    text-decoration: underline;
}

/* ============================================================
   页脚
   ============================================================ */

.site-footer {
    background: var(--bg-soft);
    border-top: 1px solid var(--border);
    padding: 48px 0;
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-brand img {
    height: 32px;
    width: auto;
    border-radius: 6px;
}

.footer-brand span {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
}

.footer-links {
    display: flex;
    gap: 28px;
}

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

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

.footer-copy {
    text-align: center;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-dim);
}

/* ============================================================
   响应式
   ============================================================ */

@media (max-width: 900px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .scene-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .model-card {
        grid-template-columns: 1fr;
        gap: 32px;
        padding: 32px;
    }
    .model-card.reverse {
        direction: ltr;
    }
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
    }
    .primary-nav {
        display: none;
    }
}

@media (max-width: 560px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
    .hero-title-line1 {
        font-size: 36px;
    }
    .hero-title-line2 {
        font-size: 22px;
    }
    .hero-subtitle {
        font-size: 18px;
    }
    .footer-grid {
        flex-direction: column;
        text-align: center;
    }
}

/* ============================================================
   产品一：便捷款胖宝（总裁助理）
   ============================================================ */

.product-hero {
    background: #0d0d0d;
    border-radius: 24px;
    overflow: hidden;
    margin-bottom: 64px;
}

.product-hero-img {
    width: 100%;
    display: block;
}

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

.product-feature {
    position: relative;
    overflow: hidden;
    padding: 48px;
    margin-bottom: 64px;
    border-radius: 8px;
    border: 1px solid rgba(20, 33, 61, .08);
    background:
        radial-gradient(circle at 50% 0%, var(--product-tint) 0%, rgba(255, 255, 255, 0) 46%),
        linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    box-shadow: 0 18px 48px rgba(15, 23, 42, .08);
}

.product-feature::before {
    content: '';
    position: absolute;
    inset: 0 0 auto;
    height: 6px;
    background: linear-gradient(90deg, transparent 0%, var(--product-accent) 18%, var(--product-accent-soft) 82%, transparent 100%);
}

.product-feature-portable {
    --product-accent: #2563eb;
    --product-accent-soft: #7dd3fc;
    --product-tint: rgba(37, 99, 235, .16);
}

.product-feature-desktop {
    --product-accent: #0f766e;
    --product-accent-soft: #86efac;
    --product-tint: rgba(15, 118, 110, .14);
}

.product-feature-portable .product-tag {
    background: rgba(37, 99, 235, .10);
    color: #1d4ed8;
}

.product-feature-desktop .product-tag {
    background: rgba(15, 118, 110, .10);
    color: #0f766e;
}

.product-detail-header {
    text-align: center;
    margin-bottom: 36px;
}

.product-detail-header .product-tag {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: 100px;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.product-detail-header h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-head);
}

.product-detail-header .product-subtitle {
    font-size: 18px;
    color: var(--text-mute);
    margin-bottom: 24px;
}

.product-price-large {
    font-size: 42px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 20px;
}

.product-price-large .price-unit {
    font-size: 20px;
    font-weight: 500;
}

/* 卖点网格 */
.product-selling-points {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 0;
}

.selling-point-card {
    background: rgba(255, 255, 255, .72);
    border: 1px solid rgba(20, 33, 61, .06);
    border-radius: 8px;
    padding: 28px 20px;
    text-align: center;
    transition: transform .2s, box-shadow .2s;
}

.selling-point-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,.08);
}

.selling-point-icon {
    font-size: 36px;
    margin-bottom: 14px;
}

.selling-point-card h4 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-head);
}

.selling-point-card p {
    font-size: 14px;
    color: var(--text-mute);
    line-height: 1.6;
}

/* 图片画廊 */
.product-gallery {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 28px;
}

.product-gallery .gallery-main {
    grid-column: 1 / -1;
}

.product-gallery .gallery-item {
    border-radius: 8px;
    overflow: hidden;
    background: rgba(255, 255, 255, .72);
    border: 1px solid rgba(20, 33, 61, .06);
}

.product-gallery .gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform .3s;
}

.product-gallery .gallery-item:hover img {
    transform: scale(1.02);
}

/* 产品二简洁展示 */
.product-secondary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    margin-top: 80px;
    padding-top: 64px;
    border-top: 1px solid #eaeef5;
}

.product-secondary.reverse {
    direction: rtl;
}

.product-secondary.reverse > * {
    direction: ltr;
}

.product-secondary-img {
    background: #f6f8fb;
    border-radius: 20px;
    padding: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-secondary-img img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
}

.product-secondary-info h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 12px;
}

.product-secondary-info > p {
    color: var(--text-mute);
    font-size: 17px;
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-secondary-info ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.product-secondary-info ul li {
    font-size: 15px;
    color: var(--text-body);
    padding-left: 24px;
    position: relative;
}

.product-secondary-info ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

@media (max-width: 768px) {
    .product-feature {
        padding: 24px 16px;
        margin-bottom: 40px;
    }
    .product-selling-points {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .selling-point-card {
        padding: 20px 14px;
    }
    .product-gallery {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .product-secondary,
    .product-secondary.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
        gap: 28px;
    }
    .product-secondary.reverse > * {
        direction: ltr;
    }
    .product-price-large {
        font-size: 32px;
    }
}

.footer-contact {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    font-size: 15px;
    color: var(--text-body);
}

.footer-contact span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

@media (max-width: 768px) {
    .footer-contact {
        flex-direction: column;
        gap: 12px;
    }
}

/* ============================================================
   下单页面
   ============================================================ */

.order-product-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 56px;
}

.order-product-card {
    position: relative;
    background: #fff;
    border: 2px solid #eaeef5;
    border-radius: 20px;
    padding: 28px;
    cursor: pointer;
    transition: border-color .2s, box-shadow .2s;
    display: block;
}

.order-product-card:hover {
    border-color: var(--accent);
    box-shadow: 0 8px 24px rgba(0,108,228,.08);
}

.order-product-card input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.order-product-card input[type="radio"]:checked + .order-product-check {
    opacity: 1;
    transform: scale(1);
}

.order-product-card input[type="radio"]:checked ~ .order-product-info .order-product-price {
    color: var(--accent);
}

.order-product-card:has(input[type="radio"]:checked) {
    border-color: var(--accent);
    box-shadow: 0 8px 24px rgba(0,108,228,.12);
}

.order-product-check {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 28px;
    height: 28px;
    background: var(--accent);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    opacity: 0;
    transform: scale(.6);
    transition: all .2s;
}

.order-product-img {
    background: #f6f8fb;
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.order-product-img img {
    max-width: 100%;
    height: auto;
    max-height: 200px;
    object-fit: contain;
}

.order-product-info h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 6px;
}

.order-product-info p {
    font-size: 14px;
    color: var(--text-mute);
    margin-bottom: 12px;
    line-height: 1.5;
}

.order-product-tag {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 3px 12px;
    border-radius: 100px;
    margin-bottom: 8px;
}

.order-product-price {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-head);
    transition: color .2s;
}

/* 表单 */
.order-form {
    background: #fff;
    border: 1px solid #eaeef5;
    border-radius: 20px;
    padding: 40px;
    max-width: 720px;
    margin: 0 auto;
}

.order-form h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 28px;
    text-align: center;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 28px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group-full {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-body);
}

.form-group label span {
    color: #e74c3c;
}

.form-group input,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid #d8dce6;
    border-radius: 10px;
    font-size: 15px;
    font-family: inherit;
    background: #fff;
    color: var(--text-body);
    transition: border-color .2s, box-shadow .2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0,108,228,.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #a0a8b8;
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

.order-hint {
    text-align: center;
    font-size: 14px;
    color: var(--text-mute);
    margin-top: 16px;
}

@media (max-width: 768px) {
    .order-product-grid {
        grid-template-columns: 1fr;
    }
    .order-form {
        padding: 24px;
    }
    .form-grid {
        grid-template-columns: 1fr;
    }
}