/* ============================================
   杭州鹊桥相亲角科技有限公司 - 官网样式
   ============================================ */

/* ---------- CSS 变量 ---------- */
:root {
    --color-primary: #EC4899;
    --color-primary-dark: #DB2777;
    --color-primary-light: #F472B6;
    --color-accent: #FDA4AF;
    --color-bg: #ffffff;
    --color-bg-alt: #FFF5F7;
    --color-bg-dark: #831843;
    --color-text: #3D2B3D;
    --color-text-secondary: #7C6F7C;
    --color-text-light: #B5A9B5;
    --color-border: #FCE4EC;
    --color-gradient-start: #F472B6;
    --color-gradient-end: #DB2777;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", Monaco, Inconsolata, "Fira Mono", monospace;

    --container-max: 1200px;
    --header-height: 72px;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition: all 0.3s ease;
}

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

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

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

ul {
    list-style: none;
}

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

.gradient-text {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---------- Header ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
    height: var(--header-height);
}

.header.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
}

.logo:hover {
    color: var(--color-text);
}

.logo-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.logo-icon img {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.logo-text {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    padding: 8px 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transition: width 0.3s ease;
    border-radius: 2px;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

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

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #FFF0F5 0%, #FCE7F3 50%, #FDF2F8 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 20%, rgba(236, 72, 153, 0.10) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(253, 164, 175, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(219, 39, 119, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

.hero-bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(236, 72, 153, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(236, 72, 153, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
}

.hero-content {
    position: relative;
    text-align: center;
    padding-top: var(--header-height);
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.75rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    max-width: 680px;
    margin: 0 auto 3rem;
    line-height: 1.7;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    border-radius: var(--radius);
    box-shadow: 0 4px 14px 0 rgba(236, 72, 153, 0.45);
    transition: var(--transition);
}

.btn-primary:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(236, 72, 153, 0.55);
}

.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-hint span {
    display: block;
    width: 24px;
    height: 40px;
    border: 2px solid rgba(236, 72, 153, 0.35);
    border-radius: 12px;
    position: relative;
}

.scroll-hint span::after {
    content: "";
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: rgba(236, 72, 153, 0.55);
    border-radius: 2px;
    animation: scrollBounce 1.5s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { opacity: 1; transform: translate(-50%, 0); }
    50% { opacity: 0.5; transform: translate(-50%, 10px); }
}

/* ---------- Section 通用 ---------- */
.section {
    padding: 100px 0;
    position: relative;
}

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

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-primary-dark);
    background: rgba(236, 72, 153, 0.10);
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.section-desc {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    max-width: 640px;
    margin: 0 auto;
}

/* ---------- About ---------- */
.section-about {
    background: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 1.25rem;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-lead {
    font-size: 1.125rem !important;
    color: var(--color-text) !important;
    font-weight: 500;
}

.about-visual {
    display: grid;
    gap: 20px;
}

.visual-card {
    padding: 28px 32px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.visual-card:hover {
    transform: translateX(8px);
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
    background: #fff;
}

.card-icon {
    font-size: 1.75rem;
    margin-bottom: 12px;
}

.visual-card h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
}

.visual-card p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

/* ---------- Business ---------- */
.section-business {
    background: var(--color-bg-alt);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.business-card {
    background: #fff;
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.business-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.business-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.business-card:hover::before {
    transform: scaleX(1);
}

.business-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(244, 114, 182, 0.15), rgba(219, 39, 119, 0.12));
    border-radius: var(--radius);
    color: var(--color-primary);
    margin-bottom: 20px;
}

.business-icon svg {
    width: 28px;
    height: 28px;
}

.business-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 10px;
}

.business-card p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ---------- Company Info ---------- */
.section-company {
    background: var(--color-bg);
}

.info-table {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.info-row {
    display: grid;
    grid-template-columns: 180px 1fr;
    padding: 20px 28px;
    border-bottom: 1px solid var(--color-border);
    align-items: start;
}

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

.info-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-size: 0.9375rem;
    color: var(--color-text);
    font-weight: 500;
}

/* ---------- Footer ---------- */
.footer {
    background: #FDF2F8;
    padding: 48px 0 28px;
    color: var(--color-text-secondary);
    border-top: 1px solid var(--color-border);
}

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

.footer-top {
    text-align: center;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--color-border);
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
}

.footer-brand .logo-icon {
    font-size: 1.5rem;
}

.footer-brand .logo-icon img {
    width: 32px;
    height: 32px;
}

.footer-slogan {
    font-size: 0.8125rem;
    color: var(--color-text-light);
    letter-spacing: 0.05em;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom p {
    font-size: 0.8125rem;
    color: var(--color-text-light);
}

.footer-icp {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-icp a {
    font-size: 0.8125rem;
    color: var(--color-text-light);
}

.footer-icp a:hover {
    color: var(--color-primary);
}

/* ---------- Back to Top ---------- */
.back-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

.back-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-top:hover {
    transform: translateY(-4px);
    color: #fff;
}

.back-top svg {
    width: 22px;
    height: 22px;
}

/* ---------- 动画 ---------- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

@media (max-width: 768px) {
    .section {
        padding: 72px 0;
    }

    .section-header {
        margin-bottom: 48px;
    }

    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        box-shadow: var(--shadow-md);
        border-top: 1px solid var(--color-border);
        transform: translateY(-120%);
        transition: transform 0.3s ease;
    }

    .nav.open {
        transform: translateY(0);
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding: 140px 0 80px;
    }

    .hero-stats {
        gap: 32px;
    }

    .stat-divider {
        display: none;
    }

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

    .info-row {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .back-top {
        bottom: 24px;
        right: 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-content {
        padding-top: 20px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .section {
        padding: 56px 0;
    }
}

/* ---------- 打印样式 ---------- */
@media print {
    .header,
    .nav-toggle,
    .back-top,
    .scroll-hint {
        display: none;
    }

    body {
        background: #fff;
    }

    .section {
        padding: 40px 0;
        page-break-inside: avoid;
    }

    .hero {
        min-height: auto;
        padding: 0;
        background: #fff;
    }

    .hero-bg,
    .hero-bg::before {
        display: none;
    }
}