/**
 * 业务模式双卡片 — 样式对齐来源：
 * demo/src/app/pages/HomePage.tsx（「业务模式」section，约 L212–295）+ SectionHeader（L87–91）
 * Tailwind 语义：py-24 · max-w-7xl · px-4/md:px-8 · max-w-6xl 卡片区 · gap-8/lg:gap-10
 */

.demo-biz-section {
    /* HomePage: blue-600 用于描边条、图标底、按钮 hover */
    --biz-blue: #2563eb;
    --biz-blue-hover: #1d4ed8;
    /* HomePage: border-blue-100 + shadow rgb(37,99,235,0.08) */
    --biz-border-hover: #dbeafe;
    --biz-shadow-hover: 0 8px 40px rgba(37, 99, 235, 0.08);
    /* HomePage 卡片无 translateY，仅边框/阴影/光晕 */
    --biz-card-lift: 0;

    position: relative;
    width: 100vw;
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
    background: #f8fafc;
    overflow: hidden;
}

/* 与 pencil bskKZ 类似的极淡径向高光 */
.demo-biz-section::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background: radial-gradient(
        ellipse 120% 80% at 50% 0%,
        rgba(10, 10, 10, 0.03) 0%,
        transparent 55%
    );
}

/* HomePage: radial dot grid opacity 0.03 */
.demo-biz-section::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    opacity: 0.03;
    color: #0f172a;
    background-image: radial-gradient(circle at 2px 2px, currentColor 1px, transparent 0);
    background-size: 32px 32px;
}

/* max-w-7xl · py-24 · px-4 md:px-8 */
.demo-biz-section__inner {
    position: relative;
    z-index: 1;
    max-width: 1280px;
    margin: 0 auto;
    padding: 96px 16px;
    box-sizing: border-box;
}

@media (min-width: 768px) {
    .demo-biz-section__inner {
        padding: 96px 32px;
    }
}

/* SectionHeader: max-w-3xl(768) · mb-16 · h2 mb-6 · text-[17px] leading-relaxed text-slate-500 */
.demo-biz-section__header {
    max-width: 768px;
    margin: 0 auto 64px;
    text-align: center;
}

/* text-3xl md:text-4xl lg:text-[40px] font-bold text-slate-900 mb-6 tracking-tight */
.demo-biz-section__title {
    margin: 0 0 24px;
    font-family: var(--bs-font-sans-serif);
    font-size: 1.875rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.2;
    color: #0f172a;
}

@media (min-width: 768px) {
    .demo-biz-section__title {
        font-size: 2.25rem;
    }
}

@media (min-width: 1024px) {
    .demo-biz-section__title {
        font-size: 40px;
        letter-spacing: -0.02em;
        line-height: 1.1111;
    }
}

.demo-biz-section__lead {
    margin: 0 auto;
    max-width: 48rem;
    font-family: var(--bs-font-sans-serif);
    font-size: 17px;
    font-weight: 300;
    letter-spacing: -0.02em;
    line-height: 1.625;
    color: #64748b;
}

/* grid · max-w-6xl · gap-8 lg:gap-10 */
.demo-biz-section__cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    max-width: 1152px;
    margin: 0 auto;
    width: 100%;
    align-items: stretch;
}

@media (min-width: 1024px) {
    .demo-biz-section__cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 40px;
    }
}

.demo-biz-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    border-radius: 24px;
    background: #ffffff;
    border: 1px solid #f3f4f6;
    /* HomePage: p-8 md:p-12 */
    padding: 32px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateY(0);
    transition: border-color 0.5s ease, box-shadow 0.5s ease,
        transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

@media (min-width: 768px) {
    .demo-biz-card {
        padding: 48px;
    }
}

/* HomePage: 右上角淡蓝光晕，hover 700ms 渐入 */
.demo-biz-section__cards .demo-biz-card::before {
    content: "";
    position: absolute;
    right: -5rem;
    top: -5rem;
    width: 16rem;
    height: 16rem;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    opacity: 0;
    transition: opacity 0.7s ease;
    filter: blur(48px);
}

.demo-biz-section__cards .demo-biz-card:nth-child(1)::before {
    background: linear-gradient(to bottom right, rgba(239, 246, 255, 1), transparent);
}

.demo-biz-section__cards .demo-biz-card:nth-child(2)::before {
    background: linear-gradient(to bottom left, rgba(239, 246, 255, 1), transparent);
}

.demo-biz-card:hover::before {
    opacity: 1;
}

/* HomePage: hover:border-blue-100 + shadow，无整体上移 */
.demo-biz-card:hover {
    z-index: 2;
    border-color: var(--biz-border-hover);
    box-shadow: var(--biz-shadow-hover);
    transform: translateY(var(--biz-card-lift));
}

/* flex flex-col sm:flex-row sm:items-center gap-5 sm:gap-6 mb-8 */
.demo-biz-card__top {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: flex-start;
    margin-bottom: 32px;
}

@media (min-width: 640px) {
    .demo-biz-card__top {
        flex-direction: row;
        align-items: center;
        gap: 24px;
    }
}

/* Pencil Tu5Ek：64×64 容器，内层图标约 32×32，默认描色 #155dfc */
.demo-biz-card__icon-wrap {
    flex: 0 0 64px;
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: #f9fafb;
    border: 1px solid #f3f4f6;
    box-shadow: 0 1px 1.75px rgba(0, 0, 0, 0.1), 0 1px 2.625px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(1);
    transition: background 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease,
        transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Font Awesome 需直接设字号/颜色；font-family 防 Inter 继承成方框 */
.demo-biz-card__icon-wrap .fa {
    font-family: FontAwesome !important;
    font-size: 32px;
    line-height: 1;
    vertical-align: middle;
    color: #2563eb;
    transition: color 0.28s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 卡片悬停：蓝底上的图标为纯白（!important 压过主题里对 .fa 的颜色） */
.demo-biz-card:hover .demo-biz-card__icon-wrap {
    background: var(--biz-blue);
    border-color: var(--biz-blue);
    box-shadow: none;
    transform: scale(1.1);
}

.demo-biz-card:hover .demo-biz-card__icon-wrap .fa {
    color: #ffffff !important;
}

/* Pencil LgrrO：标题与说明块 gap 8；副标题两行用 flex 固定行距，避免 <br> 与主题 p 边距干扰 */
.demo-biz-card__intro {
    position: relative;
    z-index: 1;
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.demo-biz-card__intro h3 {
    margin: 0;
    padding: 0;
    display: block;
    font-family: var(--bs-font-sans-serif);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.3333333333333333;
    color: #111827;
    transition: color 0.28s ease;
}

.demo-biz-card:hover .demo-biz-card__intro h3 {
    color: #1a1a1a;
}

.demo-biz-card__intro-desc {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 0;
}

/* 每行独立行盒：与 Pencil 1dlAV 一致 line-height 1.625 × 14px */
.demo-biz-card__intro-line {
    margin: 0;
    padding: 0;
    border: 0;
    font-family: var(--bs-font-sans-serif);
    font-size: 14px;
    font-weight: 400;
    letter-spacing: -0.150390625px;
    line-height: 1.625;
    color: #6b7280;
    transition: color 0.28s ease;
}

.demo-biz-card:hover .demo-biz-card__intro-line {
    color: #666666;
}

/* HomePage：底轨为 gray-100 渐变；主色条 hover 展开至 1/3 宽，700ms ease-out */
.demo-biz-card__rule {
    position: relative;
    z-index: 1;
    display: block;
    width: 100%;
    height: 1px;
    /* 与上方 .demo-biz-card__top.mb-8 衔接，不再叠一层 32px margin-top */
    margin: 0 0 32px;
    padding: 0;
    border: 0;
    align-self: stretch;
    background: transparent;
}

/* Tailwind: bg-gradient-to-r from-gray-100 via-gray-100 to-transparent */
.demo-biz-card__rule::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 100%;
    z-index: 0;
    border-radius: 1px;
    background: linear-gradient(to right, #f3f4f6, #f3f4f6 40%, transparent);
}

.demo-biz-card__rule-line {
    position: relative;
    z-index: 1;
    display: block;
    height: 1px;
    width: 0;
    margin: 0;
    transform-origin: left center;
    /* HomePage: bg-blue-600 → #2563eb，与整站主色统一用 var */
    background: var(--biz-blue);
    transition: width 0.7s ease-out;
}

.demo-biz-card:hover .demo-biz-card__rule-line {
    width: 33.333%;
}

/* space-y-6 · flex gap-4 */
.demo-biz-card__list {
    position: relative;
    z-index: 1;
    list-style: none;
    margin: 0 0 40px;
    padding: 0;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    gap: 24px;
}

.demo-biz-card__list li {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

/* 列表勾：设计约 24px 视口，与 pencil 一致略放大字形 */
.demo-biz-card__list .demo-biz-card__check {
    flex: 0 0 24px;
    width: 24px;
    height: 24px;
    line-height: 24px;
    text-align: center;
    color: #3b82f6;
    font-size: 22px;
    margin-top: 1px;
    transition: color 0.28s ease;
}

.demo-biz-card:hover .demo-biz-card__check {
    color: var(--biz-blue);
}

.demo-biz-card__list span {
    padding-top: 2px;
    font-family: var(--bs-font-sans-serif);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: -0.234375px;
    line-height: 1.5;
    color: #374151;
    transition: color 0.28s ease;
}

.demo-biz-card:hover .demo-biz-card__list span {
    color: #333333;
}

/* 底部按钮：HomePage py-4 rounded-full；卡片悬停时主色实心 + 白字；箭头 hover 右移 */
.demo-biz-card__btn {
    position: relative;
    z-index: 1;
    margin-top: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 52px;
    padding: 16px 20px;
    width: 100%;
    box-sizing: border-box;
    border-radius: 9999px;
    background: #f9fafb;
    border: 1px solid transparent;
    text-decoration: none;
    font-family: var(--bs-font-sans-serif);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: -0.150390625px;
    line-height: 1.4285714285714286;
    color: #101828;
    max-width: none;
    white-space: nowrap;
    word-break: keep-all;
    transition: box-shadow 0.3s ease, background 0.3s ease, color 0.3s ease,
        border-color 0.3s ease;
}

.demo-biz-card__btn > span,
.demo-biz-card__btn > .fa {
    flex-shrink: 0;
}

.demo-biz-card__btn .fa {
    font-family: FontAwesome !important;
    font-size: 14px;
    color: inherit;
    transition: color 0.3s ease, transform 0.3s ease;
}

.demo-biz-card:hover .demo-biz-card__btn .fa-arrow-right {
    transform: translateX(4px);
}

/* 未悬停卡片：按钮自身 hover 仅阴影/底色，无位移 */
.demo-biz-card__btn:hover {
    box-shadow: 0 12px 32px rgba(17, 24, 39, 0.08);
    background: #f3f4f6;
}

.demo-biz-card:hover .demo-biz-card__btn {
    background: var(--biz-blue);
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 8px 24px rgba(29, 97, 255, 0.35);
}

.demo-biz-card:hover .demo-biz-card__btn .fa {
    color: #ffffff;
}

.demo-biz-card:hover .demo-biz-card__btn:hover {
    background: var(--biz-blue-hover);
    box-shadow: 0 14px 36px rgba(29, 97, 255, 0.45);
}

@media (prefers-reduced-motion: reduce) {
    .demo-biz-card,
    .demo-biz-card::before,
    .demo-biz-card__icon-wrap,
    .demo-biz-card__intro h3,
    .demo-biz-card__intro-line,
    .demo-biz-card__rule,
    .demo-biz-card__rule-line,
    .demo-biz-card__list,
    .demo-biz-card__check,
    .demo-biz-card__list span,
    .demo-biz-card__btn,
    .demo-biz-card__btn .fa {
        transition: none;
    }

    /* 仅关闭卡片整体上移，保留配色与分隔线等静态悬停反馈 */
    .demo-biz-card:hover {
        transform: none;
    }
}

/* 窄屏：单列已由 grid 默认处理；内边距见 .demo-biz-section__inner */