/* ==========================================================================
   system.html — 平台页面专用样式
   朗致科技 | nazve.com
   ========================================================================== */

/* ---- CSS 变量（继承 modern.css 主题） ---- */
:root {
    --sys-primary: #259ad6;
    --sys-primary-dark: #1a7bb3;
    --sys-dark: #1a1d24;
    --sys-gray-50: #f8f9fa;
    --sys-gray-100: #f0f2f5;
    --sys-gray-200: #e4e7ec;
    --sys-gray-600: #6b7280;
    --sys-gray-800: #313131;
    --sys-gray-900: #1f2937;
    --sys-shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --sys-shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --sys-shadow-lg: 0 10px 30px rgba(0,0,0,0.1);
    --sys-radius-md: 12px;
    --sys-radius-lg: 16px;
    --sys-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================
   1. Banner（与其他页面统一）
   ============================ */
.sys-hero-banner {
    position: relative;
    height: 320px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
}
.sys-hero-banner::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.25) 0%, rgba(0,0,0,0.05) 100%);
    pointer-events: none;
}
.sys-hero-banner__content {
    position: relative;
    z-index: 1;
    width: 100%;
}
.sys-hero-banner__title {
    font-size: clamp(2rem, 5vw, 2.75rem);
    font-weight: 700;
    color: #fff;
    text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

/* ============================
   2. 面包屑导航
   ============================ */
.sys-breadcrumb {
    background: var(--sys-gray-50);
    border-bottom: 1px dashed var(--sys-gray-200);
}
.sys-breadcrumb__inner {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    height: 52px;
    font-size: 0.875rem;
    color: var(--sys-gray-600);
}
.sys-breadcrumb__inner a {
    color: var(--sys-gray-600);
    text-decoration: none;
    transition: color var(--sys-transition);
}
.sys-breadcrumb__inner a:hover {
    color: var(--sys-primary);
}
.sys-breadcrumb__sep {
    color: #cbd5e1;
    user-select: none;
}

/* ============================
   2. 多端同步 Hero
   ============================ */
.sys-hero {
    background: #fff;
    text-align: center;
    padding: 4rem 0 3rem;
}
.sys-hero__tag {
    display: inline-block;
    background: rgba(37, 154, 214, 0.08);
    color: var(--sys-primary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.35rem 1rem;
    border-radius: 999px;
    margin-bottom: 1.5rem;
    letter-spacing: 0.5px;
}
.sys-hero__title {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 900;
    color: var(--sys-gray-800);
    line-height: 1.2;
    margin: 0 0 1rem;
    letter-spacing: -0.5px;
}
.sys-hero__title span {
    color: var(--sys-primary);
}
.sys-hero__desc {
    max-width: 620px;
    margin: 0 auto 2.5rem;
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--sys-gray-600);
}
.sys-hero__img {
    max-width: 800px;
    margin: 0 auto;
    border-radius: var(--sys-radius-lg);
    overflow: hidden;
}
.sys-hero__img img {
    width: 100%;
    display: block;
}
.sys-hero__cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2.5rem;
    padding: 0.75rem 2rem;
    background: linear-gradient(135deg, var(--sys-primary), var(--sys-primary-dark));
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
    text-decoration: none;
    border-radius: 999px;
    box-shadow: 0 4px 16px rgba(37, 154, 214, 0.3);
    transition: transform var(--sys-transition), box-shadow var(--sys-transition);
}
.sys-hero__cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(37, 154, 214, 0.4);
    color: #fff;
    text-decoration: none;
}

/* ============================
   3. 效率提升 Banner
   ============================ */
.sys-banner {
    position: relative;
    background-size: cover;
    background-position: center;
    min-height: 560px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.sys-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg,
        rgba(26, 30, 40, 0.75) 0%,
        rgba(26, 30, 40, 0.82) 50%,
        rgba(26, 30, 40, 0.88) 100%);
}
.sys-banner__content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    padding: 0 1.5rem;
}
.sys-banner__title {
    font-size: clamp(2rem, 4.5vw, 2.8rem);
    font-weight: 900;
    color: var(--sys-primary);
    line-height: 1.25;
    margin: 0 0 0.75rem;
    letter-spacing: -0.5px;
}
.sys-banner__subtitle {
    font-size: clamp(1.35rem, 3vw, 1.75rem);
    font-weight: 700;
    color: rgba(255,255,255,0.9);
    margin: 0 0 1.5rem;
}
.sys-banner__desc {
    font-size: 1rem;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    max-width: 560px;
    margin: 0 auto;
}

/* ============================
   4. 数据传输 Section
   ============================ */
.sys-section {
    background: #fff;
    padding: 5rem 0;
}
.sys-section__header {
    text-align: center;
    margin-bottom: 3rem;
}
.sys-section__title {
    font-size: clamp(1.75rem, 4vw, 2.4rem);
    font-weight: 900;
    color: var(--sys-gray-800);
    margin: 0 0 0.75rem;
    letter-spacing: -0.5px;
}
.sys-section__desc {
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--sys-gray-600);
}
.sys-section__img {
    max-width: 900px;
    margin: 0 auto;
    border-radius: var(--sys-radius-lg);
    overflow: hidden;
}
.sys-section__img img {
    width: 100%;
    display: block;
}
.sys-section__cta {
    text-align: center;
    margin-top: 2rem;
}
.sys-section__cta .sys-hero__cta {
    margin-top: 0;
}
.sys-section__cta > a:not(.sys-hero__cta) {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--sys-primary);
    font-weight: 700;
    font-size: 0.95rem;
    text-decoration: none;
    transition: gap var(--sys-transition), color var(--sys-transition);
}
.sys-section__cta > a:not(.sys-hero__cta):hover {
    gap: 0.65rem;
    color: var(--sys-primary-dark);
}

/* ============================
   5. 企业级应用 Section + 卡片
   ============================ */
.sys-apps {
    background: #fff;
    padding: 5rem 0;
}
.sys-apps__header {
    text-align: center;
    margin-bottom: 3.5rem;
}
.sys-apps__title {
    font-size: clamp(1.75rem, 4vw, 2.4rem);
    font-weight: 900;
    color: var(--sys-gray-800);
    margin: 0 0 0.75rem;
    letter-spacing: -0.5px;
}
.sys-apps__desc {
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--sys-gray-600);
}

/* 卡片网格 */
.sys-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* 单个卡片 */
.sys-card {
    position: relative;
    background: #fff;
    border-radius: var(--sys-radius-md);
    overflow: hidden;
    box-shadow: var(--sys-shadow-sm);
    border: 1px solid var(--sys-gray-200);
    transition: transform var(--sys-transition),
                box-shadow var(--sys-transition),
                border-color var(--sys-transition);
}
.sys-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--sys-shadow-lg);
    border-color: rgba(37, 154, 214, 0.2);
}
.sys-card__media {
    position: relative;
    overflow: hidden;
    height: 200px;
    background: var(--sys-gray-100);
}
.sys-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.sys-card:hover .sys-card__media img {
    transform: scale(1.05);
}
.sys-card__body {
    padding: 1.25rem 1.5rem 1.5rem;
}
.sys-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--sys-gray-800);
    margin: 0 0 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.sys-card__title::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 16px;
    background: var(--sys-primary);
    border-radius: 2px;
    flex-shrink: 0;
}
.sys-card__desc {
    font-size: 0.9rem;
    line-height: 1.65;
    color: var(--sys-gray-600);
    margin: 0;
}

/* ============================
   响应式
   ============================ */
@media (max-width: 992px) {
    .sys-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    .sys-banner {
        min-height: 420px;
    }
}
@media (max-width: 768px) {
    .sys-hero {
        padding: 3rem 0 2rem;
    }
    .sys-section,
    .sys-apps {
        padding: 3rem 0;
    }
    .sys-cards {
        grid-template-columns: 1fr;
        max-width: 440px;
        margin: 0 auto;
    }
    .sys-banner {
        min-height: 360px;
    }
    .sys-hero__img {
        border-radius: var(--sys-radius-md);
    }
}
@media (max-width: 480px) {
    .sys-hero__title {
        font-size: 1.6rem;
    }
    .sys-banner__title {
        font-size: 1.5rem;
    }
    .sys-section__title,
    .sys-apps__title {
        font-size: 1.4rem;
    }
}