/* ============================================
   ZiXSOON 智现全自动眼镜清洗机 - 蓝白配色
   ============================================ */

:root {
    --bg-0: #f5f9ff;
    --bg-1: #ffffff;
    --bg-2: #eef4ff;
    --bg-3: #f0f6ff;
    --line: #dde7f5;
    --line-2: #c7d6ea;
    --text-0: #0d2c54;
    --text-1: #1a3d6e;
    --text-2: #4a6488;
    --text-3: #7a8ba6;
    --accent: #1e6df0;
    --accent-2: #3a8aff;
    --accent-soft: #e3edff;
    --accent-dim: rgba(30, 109, 240, 0.10);
    --success: #18a06b;
    --danger: #e23b3b;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 10px 30px rgba(30, 109, 240, 0.08);
    --shadow-md: 0 4px 16px rgba(30, 109, 240, 0.10);
    --container: 1200px;
}

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

html,
body {
    background: var(--bg-0);
    color: var(--text-0);
    font-family: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

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

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

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

/* ===== 顶部导航 ===== */
.topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
}

.topbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 20px;
    letter-spacing: 1.5px;
    color: var(--text-0);
}

.brand__mark {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-weight: 800;
    font-size: 18px;
    font-family: 'Inter', sans-serif;
}

.nav {
    display: flex;
    gap: 28px;
}

.nav__link {
    font-size: 14px;
    color: var(--text-1);
    font-weight: 500;
    transition: color 0.2s;
}

.nav__link:hover {
    color: var(--accent);
}

/* ===== 语言切换 ===== */
.lang-switch {
    display: inline-block;
    cursor: pointer;
}

.lang-switch input {
    display: none;
}

.lang-switch__track {
    position: relative;
    display: inline-flex;
    align-items: center;
    width: 64px;
    height: 28px;
    background: var(--bg-2);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 2px;
    user-select: none;
}

.lang-switch__opt {
    flex: 1;
    text-align: center;
    font-size: 12px;
    font-weight: 600;
    z-index: 1;
    transition: color 0.25s;
}

.lang-switch__opt--cn {
    color: var(--text-0);
}

.lang-switch__opt--en {
    color: var(--text-3);
}

.lang-switch__thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 30px;
    height: 22px;
    background: var(--accent);
    border-radius: 999px;
    transition: transform 0.25s ease;
}

.lang-switch input:checked+.lang-switch__track .lang-switch__thumb {
    transform: translateX(32px);
}

.lang-switch input:checked+.lang-switch__track .lang-switch__opt--cn {
    color: var(--text-3);
}

.lang-switch input:checked+.lang-switch__track .lang-switch__opt--en {
    color: #fff;
}

/* ===== 通用区段 ===== */
.section {
    padding: 80px 0;
}

.section--alt {
    background: linear-gradient(180deg, var(--bg-1) 0%, var(--bg-2) 100%);
}

.section__title {
    font-size: 32px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 12px;
    color: var(--text-0);
    letter-spacing: 1px;
}

.section__title::after {
    content: "";
    display: block;
    width: 48px;
    height: 3px;
    background: var(--accent);
    margin: 14px auto 0;
    border-radius: 2px;
}

.section__title--mid {
    margin-top: 64px;
}

.section__lead {
    text-align: center;
    font-size: 15px;
    color: var(--text-2);
    max-width: 760px;
    margin: 0 auto 40px;
}

/* ===== Hero 轮播 ===== */
.hero {
    background: linear-gradient(180deg, var(--bg-3) 0%, var(--bg-1) 100%);
    padding: 32px 0 64px;
}

.carousel {
    position: relative;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 48px;
}

.carousel__viewport {
    overflow: hidden;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.carousel__track {
    display: flex;
    transition: transform 0.5s ease;
}

.carousel__slide {
    position: relative;
    flex: 0 0 100%;
    aspect-ratio: 16 / 9;
    background: var(--bg-2);
    overflow: hidden;
}

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

.carousel__caption {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px;
    text-align: center;
    background: linear-gradient(180deg, rgba(13, 44, 84, 0.05) 0%, rgba(13, 44, 84, 0.55) 100%);
    color: #fff;
}

.carousel__title {
    font-size: clamp(28px, 4vw, 52px);
    font-weight: 800;
    letter-spacing: 1px;
    text-shadow: 0 2px 12px rgba(13, 44, 84, 0.4);
}

.carousel__subtitle {
    margin-top: 12px;
    font-size: clamp(14px, 1.4vw, 18px);
    color: rgba(255, 255, 255, 0.92);
    text-shadow: 0 1px 6px rgba(13, 44, 84, 0.3);
}

.carousel__btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.85);
    color: var(--accent);
    font-size: 28px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, color 0.2s;
    box-shadow: var(--shadow-md);
}

.carousel__btn:hover {
    background: var(--accent);
    color: #fff;
}

.carousel__btn--prev {
    left: 8px;
}

.carousel__btn--next {
    right: 8px;
}

.carousel__dots {
    position: absolute;
    bottom: 14px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
}

.carousel__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.carousel__dot.is-active {
    background: var(--accent);
    transform: scale(1.3);
}

/* ===== 特性卡片 ===== */
.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-1);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: var(--shadow);
}

.feature-card__num {
    font-size: 36px;
    font-weight: 800;
    color: var(--accent);
    opacity: 0.4;
    letter-spacing: 1px;
    margin-bottom: 12px;
    font-family: 'Inter', sans-serif;
}

.feature-card__title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-0);
}

.feature-card__desc {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.7;
}

/* ===== 使用场景图 ===== */
.scenes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: start;
}

.scene-card {
    background: var(--bg-1);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform 0.25s, box-shadow 0.25s;
}

.scene-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.scene-card__img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    background: var(--bg-2);
    padding: 10px;
}

.scene-card__cap {
    padding: 14px 18px;
    text-align: center;
    font-size: 14px;
    color: var(--text-1);
    font-weight: 500;
}

/* ===== 对比表 ===== */
.compare-table {
    background: var(--bg-1);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
}

.compare-row {
    display: grid;
    grid-template-columns: 1.1fr 1.3fr 1.3fr 1.3fr;
    border-bottom: 1px solid var(--line);
}

.compare-row:last-child {
    border-bottom: none;
}

.compare-cell {
    padding: 16px 18px;
    font-size: 14px;
    color: var(--text-1);
    line-height: 1.6;
    border-right: 1px solid var(--line);
}

.compare-cell:last-child {
    border-right: none;
}

.compare-row--head .compare-cell {
    font-weight: 700;
    color: var(--text-0);
    background: var(--bg-2);
    font-size: 15px;
}

.compare-cell--us {
    background: var(--accent-dim);
    color: var(--accent);
    font-weight: 600;
}

.compare-note {
    display: block;
    margin-top: 6px;
    font-size: 14px;
    font-weight: 400;
    color: var(--text-2, #5a6478);
    line-height: 1.5;
}

/* ===== 适用人群 ===== */
.audience {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.audience-card {
    background: var(--bg-1);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 28px 24px;
    text-align: center;
    transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}

.audience-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: var(--shadow);
}

.audience-card__icon {
    font-size: 36px;
    margin-bottom: 12px;
    line-height: 1;
}

.audience-card__title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 8px;
}

.audience-card__desc {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.6;
}

/* ===== 痛点 ===== */
.pain-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 32px;
}

.pain-card {
    background: var(--bg-1);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    transition: transform 0.25s, box-shadow 0.25s;
}

.pain-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.pain-card--bad {
    background: linear-gradient(180deg, #fff5f5 0%, #ffffff 100%);
    border-color: #ffd5d5;
}

.pain-card__icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--danger);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    margin: 0 auto 12px;
}

.pain-card__title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 8px;
}

.pain-card__desc {
    font-size: 13px;
    color: var(--text-2);
    line-height: 1.6;
}

.pain-quote {
    max-width: 800px;
    margin: 24px auto 0;
    text-align: center;
    font-size: 15px;
    color: var(--text-1);
    font-style: italic;
    padding: 20px 28px;
    background: var(--accent-dim);
    border-left: 3px solid var(--accent);
    border-radius: 0 var(--radius) var(--radius) 0;
}

/* ===== 详细规格 ===== */
.specs {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-1);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 8px 24px;
}

.spec-row {
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-row__label {
    font-size: 14px;
    color: var(--text-2);
    flex-shrink: 0;
    min-width: 120px;
}

.spec-row__value {
    font-size: 15px;
    color: var(--text-0);
    font-weight: 500;
    text-align: right;
}

/* ===== 服务保障 ===== */
.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 800px;
    margin: 32px auto 0;
}

.service-card {
    background: var(--bg-1);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    transition: transform 0.25s, border-color 0.25s;
}

.service-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
}

.service-card__num {
    font-size: 32px;
    font-weight: 800;
    color: var(--accent);
    font-family: 'Inter', sans-serif;
    margin-bottom: 8px;
}

.service-card__desc {
    font-size: 14px;
    color: var(--text-1);
}

/* ===== 安装须知 ===== */
.install-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.install-card {
    background: var(--bg-1);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 28px;
    position: relative;
}

.install-card__num {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 36px;
    font-weight: 800;
    color: var(--accent);
    opacity: 0.25;
    font-family: 'Inter', sans-serif;
}

.install-card__title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 14px;
}

.install-card__list {
    padding-left: 20px;
    list-style: disc;
    color: var(--text-2);
    font-size: 14px;
    line-height: 1.7;
}

.install-card__list li {
    margin-bottom: 6px;
}

/* ===== 关于我们 ===== */
.about {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-1);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 40px;
}

.about__brand {
    display: flex;
    align-items: center;
    gap: 24px;
    padding-bottom: 28px;
    margin-bottom: 28px;
    border-bottom: 1px solid var(--line);
}

.about__logo {
    flex-shrink: 0;
    width: 110px;
    height: 110px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 1.5px;
    font-family: 'Inter', sans-serif;
    text-align: center;
    line-height: 1.2;
    box-shadow: 0 6px 20px rgba(30, 109, 240, 0.25);
}

.about__slogan {
    flex: 1;
}

.about__slogan-line {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 6px;
    letter-spacing: 1px;
}

.about__slogan-line:last-child {
    margin-bottom: 0;
    color: var(--accent);
}

.about__desc {
    font-size: 15px;
    color: var(--text-1);
    line-height: 1.9;
    margin-bottom: 20px;
    text-align: justify;
}

.about__desc:last-of-type {
    margin-bottom: 0;
}

.about__vision {
    margin-top: 28px;
    padding: 24px 28px;
    background: linear-gradient(135deg, var(--accent-dim) 0%, rgba(58, 138, 255, 0.08) 100%);
    border-left: 3px solid var(--accent);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.about__vision-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.about__vision-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-0);
    line-height: 1.5;
}

/* ===== 联系我们 ===== */
.contact {
    text-align: center;
}

.contact__lead {
    font-size: 15px;
    color: var(--text-2);
    margin-bottom: 28px;
}

.contact__company {
    margin-top: 32px;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-0);
}

.contact__tax {
    margin-top: 8px;
    font-size: 13px;
    color: var(--text-3);
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    letter-spacing: 0.5px;
}

.contact__addr {
    margin-top: 8px;
    font-size: 14px;
    color: var(--text-2);
}

.btn--email {
    margin-left: 12px;
    background: var(--bg-1);
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn--email:hover {
    background: var(--accent);
    color: #fff;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius);
    transition: transform 0.15s, background 0.2s, box-shadow 0.2s;
}

.btn--primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    color: #fff;
    box-shadow: 0 6px 20px rgba(30, 109, 240, 0.3);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(30, 109, 240, 0.4);
}


.btn--ghost {
    padding: 8px 16px;
    font-size: 13px;
    background: transparent;
    color: var(--text-1);
    border: 1px solid var(--line);
}

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

/* ===== 亚马逊店铺入口 ===== */
.amazon-cta {
    position: relative;
    z-index: 5;
    margin-top: -34px;
    padding-bottom: 8px;
}

.amazon-cta__band {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    padding: 20px 32px;
    border-radius: var(--radius);
    background:
        radial-gradient(120% 160% at 0% 0%, rgba(255, 153, 0, 0.22) 0%, transparent 55%),
        linear-gradient(135deg, #232f3e 0%, #131a22 100%);
    border: 1px solid rgba(255, 153, 0, 0.35);
    box-shadow: 0 14px 34px rgba(13, 44, 84, 0.22);
}

.amazon-cta__eyebrow {
    color: #dfe6ef;
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.01em;
}

.amazon-cta__eyebrow::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    margin-right: 10px;
    border-radius: 50%;
    background: #ff9900;
    box-shadow: 0 0 0 4px rgba(255, 153, 0, 0.18);
    vertical-align: middle;
}

.btn--amazon {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 34px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 700;
    color: #131a22;
    background: linear-gradient(135deg, #ffb63d 0%, #ff9900 55%, #f08804 100%);
    box-shadow: 0 8px 22px rgba(255, 153, 0, 0.42);
    transition: transform 0.18s, box-shadow 0.18s, filter 0.18s;
    white-space: nowrap;
}

.btn--amazon:hover {
    transform: translateY(-2px);
    filter: brightness(1.04);
    box-shadow: 0 12px 30px rgba(255, 153, 0, 0.55);
}

.btn--amazon__cart {
    width: 22px;
    height: 22px;
    flex: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23131a22' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='9' cy='20' r='1.6'/%3E%3Ccircle cx='18' cy='20' r='1.6'/%3E%3Cpath d='M2 3h2.2l2.4 12.2a1.6 1.6 0 0 0 1.6 1.3h8.9a1.6 1.6 0 0 0 1.6-1.3L21 7H5'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.btn--amazon__arrow {
    font-size: 18px;
    line-height: 1;
    transition: transform 0.18s;
}

.btn--amazon:hover .btn--amazon__arrow {
    transform: translateX(4px);
}

@media (max-width: 768px) {
    .amazon-cta {
        margin-top: -20px;
    }

    .amazon-cta__band {
        gap: 16px;
        padding: 18px 20px;
        text-align: center;
    }

    .amazon-cta__eyebrow {
        font-size: 14px;
    }

    .btn--amazon {
        width: 100%;
        justify-content: center;
        padding: 15px 22px;
        font-size: 15px;
    }
}

/* ===== 悬浮众筹按钮 ===== */
.kickstarter-float {
    position: fixed;
    right: 24px;
    bottom: 100px;
    z-index: 1000;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 28px;
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, #05ce78 0%, #00b368 100%);
    border-radius: 50px;
    box-shadow: 0 6px 24px rgba(5, 206, 120, 0.35);
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
    white-space: nowrap;
}

.kickstarter-float:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 32px rgba(5, 206, 120, 0.45);
}

.kickstarter-float::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    margin-right: 10px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-2 15l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

@media (max-width: 768px) {
    .kickstarter-float {
        right: 16px;
        bottom: 80px;
        padding: 14px 20px;
        font-size: 14px;
    }
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-2);
    border-top: 1px solid var(--line);
    padding: 24px 0;
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.footer__copy {
    font-size: 13px;
    color: var(--text-2);
}


/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-0);
    color: #fff;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-size: 14px;
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s, opacity 0.3s;
    z-index: 200;
    max-width: 90vw;
}

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

.toast--success {
    background: var(--success);
}

.toast--error {
    background: var(--danger);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {

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

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

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

    .compare-row {
        grid-template-columns: 1fr 1.2fr 1.2fr 1.2fr;
    }

    .compare-cell {
        padding: 12px;
        font-size: 13px;
    }

    .nav {
        display: none;
    }
}

@media (max-width: 640px) {
    .section {
        padding: 56px 0;
    }

    .section__title {
        font-size: 24px;
    }

    .section__title--mid {
        margin-top: 48px;
    }

    .features,
    .scenes,
    .audience,
    .pain-grid,
    .service-grid {
        grid-template-columns: 1fr;
    }

    .compare-row {
        grid-template-columns: 1fr;
        border-bottom: 1px solid var(--line);
        padding: 12px 0;
    }

    .compare-cell {
        border-right: none;
        border-bottom: 1px dashed var(--line);
    }

    .compare-cell--us {
        font-weight: 700;
    }

    .compare-row--head .compare-cell {
        background: var(--accent-dim);
    }

    .carousel {
        padding: 0 12px;
    }

    .carousel__btn {
        width: 36px;
        height: 36px;
        font-size: 22px;
    }

    .footer__inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .spec-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .spec-row__label {
        min-width: 0;
    }

    .spec-row__value {
        text-align: left;
    }

    .about {
        padding: 24px;
    }

    .about__brand {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .about__logo {
        width: 80px;
        height: 80px;
        font-size: 14px;
    }

    .about__slogan-line {
        font-size: 18px;
    }

    .about__vision-text {
        font-size: 15px;
    }

    .btn--email {
        margin-left: 0;
        margin-top: 12px;
    }
}