/*
 * 深舍传感 — 设计系统
 * 从 Ardot 设计稿 1:1 提取
 */

/* ==================== CSS 变量 ==================== */
:root {
    /* 品牌色 */
    --color-primary:       #3B82F6;
    --color-primary-dark:  #2563EB;
    --color-green:         #10B981;
    --color-green-dark:    #059669;
    --color-amber:         #F59E0B;
    --color-indigo:        #6366F1;
    --color-red:           #EF4444;

    /* 渐变色 (用于 CTA Banner) */
    --gradient-brand: linear-gradient(135deg, var(--color-primary), var(--color-green));
    --gradient-blue-purple: linear-gradient(90deg, var(--color-primary), var(--color-indigo));
    --gradient-green-blue: linear-gradient(90deg, var(--color-green), var(--color-primary));

    /* 中性色 */
    --color-page:          #FFFFFF;
    --color-bg:            #F9FAFB;
    --color-bg-alt:        #F8F9FC;
    --color-text:          #18191C;
    --color-text-gray:     #6B7280;
    --color-text-light:    #9CA3AF;
    --color-border:        #E8E8EB;

    /* 卡片背景 */
    --card-blue:           #F5F8FF;
    --card-green:          #F0FDF8;
    --card-purple:         #FAF5FF;
    --card-amber:          #FAF8F2;

    /* Footer */
    --footer-bg:           #0A0A0B;
    --footer-text:         #9CA3AF;
    --footer-divider:      #29292E;

    /* 排版 */
    --font-heading: 'Mona Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    --fs-display:   48px;
    --fs-h1:        40px;
    --fs-h2:        32px;
    --fs-h3:        24px;
    --fs-h4:        20px;
    --fs-lg:        18px;
    --fs-base:      16px;
    --fs-sm:        15px;
    --fs-xs:        14px;
    --fs-2xs:       13px;

    --fw-bold:      700;
    --fw-semi:      600;
    --fw-medium:    500;
    --fw-regular:   400;

    --lh-tight:     1.2;
    --lh-normal:    1.6;
    --lh-relaxed:   1.8;

    /* 间距 */
    --section-pad-y: 80px;
    --section-pad-x: 64px;

    /* 圆角 */
    --radius-sm:     6px;
    --radius-md:     8px;
    --radius-lg:     12px;
    --radius-xl:     16px;
    --radius-2xl:    24px;
    --radius-full:   9999px;

    /* 阴影 */
    --shadow-sm:     0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md:     0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg:     0 10px 25px rgba(0, 0, 0, 0.1);

    /* 布局 */
    --header-h:      72px;
    --content-max:   1312px;
}

/* ==================== 全局 Reset ==================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-body);
    font-size: var(--fs-base);
    font-weight: var(--fw-regular);
    line-height: var(--lh-normal);
    color: var(--color-text);
    background: var(--color-page);
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-primary-dark);
}

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--fw-bold);
    line-height: var(--lh-tight);
    color: var(--color-text);
}

h1 { font-size: var(--fs-display); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); }

button, .btn {
    cursor: pointer;
    border: none;
    font-family: var(--font-body);
    font-size: var(--fs-base);
    transition: all 0.2s ease;
}

/* ==================== 布局容器 ==================== */
.container {
    width: 100%;
    max-width: var(--content-max);
    margin: 0 auto;
}

.container-wide {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Section 通用 */
.section {
    padding: var(--section-pad-y) var(--section-pad-x);
}

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

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

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header--left {
    text-align: left;
    margin-bottom: 40px;
}

.section-label {
    display: inline-block;
    font-size: var(--fs-xs);
    font-weight: var(--fw-semi);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.section-title {
    font-size: var(--fs-h2);
    color: var(--color-text);
    margin-bottom: 12px;
}

.section-desc {
    font-size: var(--fs-lg);
    color: var(--color-text-gray);
    max-width: 720px;
}

.section-header .section-desc {
    margin: 0 auto;
}

/* ==================== Header / 导航 ==================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-h);
    background: var(--color-page);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
}

.site-header .container {
    display: flex;
    align-items: center;
    padding: 0 var(--section-pad-x);
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    margin-right: auto;
}

.site-logo img {
    height: 32px;
    width: auto;
}

.site-logo .logo-text {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: var(--fw-bold);
    color: var(--color-text);
    white-space: nowrap;
}

/* 主导航 */
.primary-nav {
    display: flex;
    align-items: center;
    gap: 32px;
    margin-left: 48px;
}

.primary-nav a {
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-text-gray);
    padding: 8px 0;
    position: relative;
}

.primary-nav a:hover,
.primary-nav .current-menu-item a,
.primary-nav .current_page_item a {
    color: var(--color-primary);
}

.primary-nav .current-menu-item a::after,
.primary-nav .current_page_item a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    border-radius: 1px;
}

/* Nav CTA */
.nav-cta {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    background: var(--color-primary);
    color: #FFFFFF !important;
    font-size: var(--fs-xs);
    font-weight: var(--fw-semi);
    border-radius: var(--radius-full);
    margin-left: 32px;
    white-space: nowrap;
    transition: background 0.2s;
}

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

/* Mobile Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    padding: 4px;
    margin-left: auto;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: all 0.3s ease;
}

/* ==================== Banner / Hero ==================== */
.banner {
    padding: 100px var(--section-pad-x);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.banner--gradient {
    color: #FFFFFF;
}

.banner--gradient .banner-title,
.banner--gradient .banner-desc {
    color: #FFFFFF;
}

.banner--gradient .banner-desc {
    opacity: 0.8;
}

.banner--image {
    background-size: cover;
    background-position: center;
    position: relative;
}

.banner--image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
}

.banner--image > * {
    position: relative;
    z-index: 1;
}

.banner-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.2);
    color: #FFFFFF;
    font-size: var(--fs-xs);
    font-weight: var(--fw-semi);
    border-radius: var(--radius-full);
    margin-bottom: 4px;
}

.banner-title {
    font-size: var(--fs-display);
    font-weight: var(--fw-bold);
    color: var(--color-text);
    max-width: 900px;
}

.banner-desc {
    font-size: var(--fs-lg);
    color: var(--color-text-gray);
    max-width: 720px;
    line-height: var(--lh-relaxed);
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 32px;
    font-size: var(--fs-base);
    font-weight: var(--fw-semi);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn--primary {
    background: var(--color-primary);
    color: #FFFFFF;
}

.btn--primary:hover {
    background: var(--color-primary-dark);
    color: #FFFFFF;
}

.btn--white {
    background: #FFFFFF;
    color: var(--color-primary);
}

.btn--white:hover {
    background: #F9FAFB;
    color: var(--color-primary-dark);
}

.btn--green {
    background: var(--color-green);
    color: #FFFFFF;
}

.btn--green:hover {
    background: var(--color-green-dark);
    color: #FFFFFF;
}

.btn--outline {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn--outline:hover {
    background: var(--color-primary);
    color: #FFFFFF;
}

.btn--lg {
    padding: 18px 40px;
    font-size: var(--fs-lg);
}

.btn--sm {
    padding: 10px 20px;
    font-size: var(--fs-xs);
}

/* ==================== 卡片 ==================== */
.card {
    background: #FFFFFF;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: box-shadow 0.3s ease, transform 0.2s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card__body {
    padding: 24px;
}

.card--blue   { background: var(--card-blue);   border: none; }
.card--green  { background: var(--card-green);  border: none; }
.card--purple { background: var(--card-purple); border: none; }
.card--amber  { background: var(--card-amber);  border: none; }

/* 带图标的卡片 */
.icon-circle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    font-size: 20px;
}

.icon-circle--blue   { background: var(--color-primary); color: #FFFFFF; }
.icon-circle--green  { background: var(--color-green);  color: #FFFFFF; }
.icon-circle--indigo { background: var(--color-indigo); color: #FFFFFF; }
.icon-circle--amber  { background: var(--color-amber);  color: #FFFFFF; }

/* ==================== CTA Banner ==================== */
.cta-banner {
    max-width: var(--content-max);
    margin: 0 auto;
    padding: 64px;
    border-radius: var(--radius-2xl);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 28px;
}

.cta-banner--gradient {
    background: var(--gradient-brand);
    color: #FFFFFF;
}

.cta-banner--gradient .cta-banner__title {
    color: #FFFFFF;
}

.cta-banner--gradient .cta-banner__desc {
    color: rgba(255, 255, 255, 0.8);
}

.cta-banner__title {
    font-size: var(--fs-h2);
    font-weight: var(--fw-bold);
}

.cta-banner__desc {
    font-size: var(--fs-lg);
    max-width: 640px;
}

/* ==================== Footer ==================== */
.site-footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: 60px var(--section-pad-x) 32px;
}

.footer-grid {
    max-width: var(--content-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 64px;
    padding-bottom: 48px;
}

.footer-brand .footer-logo {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: var(--fw-bold);
    color: #FFFFFF;
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: var(--fs-xs);
    line-height: var(--lh-relaxed);
    color: var(--footer-text);
}

.footer-col-title {
    font-size: var(--fs-xs);
    font-weight: var(--fw-semi);
    color: #FFFFFF;
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: var(--fs-xs);
    color: var(--footer-text);
    padding: 6px 0;
    transition: color 0.2s;
}

.footer-col a:hover {
    color: #FFFFFF;
}

.footer-bottom {
    max-width: var(--content-max);
    margin: 0 auto;
    padding-top: 24px;
    border-top: 1px solid var(--footer-divider);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--fs-2xs);
}

/* ==================== 表单 ==================== */
.form-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.form-label {
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    color: #374151;
}

.form-label .required {
    color: var(--color-red);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 14px 16px;
    font-size: var(--fs-sm);
    font-family: var(--font-body);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #FFFFFF;
    color: var(--color-text);
    transition: border-color 0.2s;
    outline: none;
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-light);
}

.form-textarea {
    min-height: 140px;
    resize: vertical;
}

.form-row {
    display: flex;
    gap: 16px;
}

.form-submit {
    width: 100%;
    padding: 16px;
    background: var(--color-primary);
    color: #FFFFFF;
    font-size: var(--fs-base);
    font-weight: var(--fw-semi);
    font-family: var(--font-body);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background 0.2s;
}

.form-submit:hover {
    background: var(--color-primary-dark);
}

/* ==================== FAQ ==================== */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    padding: 24px;
    cursor: pointer;
    transition: background 0.2s;
}

.faq-item:hover {
    background: #EEF2FF;
}

.faq-item__q {
    font-size: var(--fs-base);
    font-weight: var(--fw-semi);
    color: var(--color-text);
    margin-bottom: 8px;
}

.faq-item__a {
    font-size: var(--fs-sm);
    color: var(--color-text-gray);
    line-height: var(--lh-relaxed);
    display: none;
}

.faq-item--open .faq-item__a {
    display: block;
}

/* ==================== 标签/徽章 ==================== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    font-size: var(--fs-2xs);
    font-weight: var(--fw-semi);
    border-radius: var(--radius-full);
}

.tag--blue   { background: #EFF6FF; color: var(--color-primary); }
.tag--green  { background: #ECFDF5; color: var(--color-green); }
.tag--amber  { background: #FFFBEB; color: var(--color-amber); }
.tag--indigo { background: #EEF2FF; color: var(--color-indigo); }

/* ==================== 统计数字 ==================== */
.stat-card {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 24px;
    border-radius: var(--radius-lg);
}

.stat-card__num {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: var(--fw-bold);
}

.stat-card__label {
    font-size: var(--fs-xs);
    color: var(--color-text-gray);
}

.stat-card--blue   { background: var(--card-blue); }
.stat-card--blue .stat-card__num { color: var(--color-primary); }
.stat-card--green  { background: var(--card-green); }
.stat-card--green .stat-card__num { color: var(--color-green); }
.stat-card--indigo { background: var(--card-purple); }
.stat-card--indigo .stat-card__num { color: var(--color-indigo); }

/* ==================== 搜索框 ==================== */
.search-box {
    display: flex;
    align-items: center;
    gap: 0;
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color 0.2s;
}

.search-box:focus-within {
    border-color: var(--color-primary);
}

.search-box__input {
    flex: 1;
    padding: 12px 16px;
    border: none;
    font-size: var(--fs-sm);
    font-family: var(--font-body);
    outline: none;
    color: var(--color-text);
}

.search-box__input::placeholder {
    color: var(--color-text-light);
}

.search-box__btn {
    padding: 12px 20px;
    background: var(--color-primary);
    color: #FFFFFF;
    border: none;
    font-size: var(--fs-sm);
    cursor: pointer;
}

/* ==================== 分类筛选 ==================== */
.filter-pills {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-pill {
    padding: 8px 18px;
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    border-radius: var(--radius-full);
    background: #FFFFFF;
    color: var(--color-text-gray);
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all 0.2s;
}

.filter-pill:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-pill--active {
    background: var(--color-primary);
    color: #FFFFFF;
    border-color: var(--color-primary);
}

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
    :root {
        --section-pad-x: 32px;
        --fs-display: 36px;
        --fs-h2: 28px;
    }

    .primary-nav {
        display: none;
    }

    .primary-nav--open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: #FFFFFF;
        border-bottom: 1px solid var(--color-border);
        padding: 16px var(--section-pad-x);
        gap: 12px;
        margin-left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-cta {
        margin-left: 0;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }

    .form-row {
        flex-direction: column;
    }
}

@media (max-width: 640px) {
    :root {
        --section-pad-x: 20px;
        --section-pad-y: 48px;
        --fs-display: 28px;
        --fs-h2: 24px;
        --fs-lg: 16px;
    }

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

    .cta-banner {
        padding: 40px 24px;
        border-radius: var(--radius-xl);
    }

    .banner {
        padding: 60px var(--section-pad-x);
    }
}