/* ========================================
   派卡兔科技 - 官网样式表
   活力创意风 · 智能益智硬件
   ======================================== */

/* ===== CSS 变量 ===== */
:root {
    /* 主色调 */
    --color-primary: #FF7A45;
    --color-primary-light: #FF9D6C;
    --color-primary-dark: #E5622E;
    --color-secondary: #00B8D4;
    --color-secondary-light: #4DD0E1;
    --color-accent: #7C4DFF;
    --color-accent-light: #9C7DFF;
    --color-yellow: #FFD93D;
    --color-pink: #FF6B9D;

    /* 中性色 */
    --color-bg: #FFF9F5;
    --color-bg-alt: #FFFFFF;
    --color-text: #2C2C2C;
    --color-text-light: #6B7280;
    --color-text-lighter: #9CA3AF;
    --color-border: #F0E6DD;

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #FF7A45 0%, #FF9D6C 100%);
    --gradient-secondary: linear-gradient(135deg, #00B8D4 0%, #4DD0E1 100%);
    --gradient-accent: linear-gradient(135deg, #7C4DFF 0%, #9C7DFF 100%);
    --gradient-warm: linear-gradient(135deg, #FF7A45 0%, #FF6B9D 100%);
    --gradient-hero: linear-gradient(160deg, #FFF4ED 0%, #FFF9F5 40%, #F0F7FF 100%);

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
    --shadow-primary: 0 8px 24px rgba(255,122,69,0.25);
    --shadow-cyan: 0 8px 24px rgba(0,184,212,0.2);

    /* 圆角 */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 999px;

    /* 间距 */
    --container-max: 1200px;
    --nav-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul {
    list-style: none;
}

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

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

input, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ===== 通用组件 ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--color-primary);
    background: rgba(255,122,69,0.1);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 900;
    color: var(--color-text);
    margin-bottom: 12px;
    line-height: 1.2;
}

.section-desc {
    font-size: 16px;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

.gradient-text {
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-full);
    font-size: 15px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(255,122,69,0.35);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 14px;
}

.btn-block {
    width: 100%;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}

.nav-container {
    max-width: var(--container-max);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 20px;
    font-weight: 900;
    color: var(--color-text);
}

.logo-sub {
    color: var(--color-primary);
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    border-radius: var(--radius-full);
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--color-primary);
    background: rgba(255,122,69,0.08);
}

.nav-link.active {
    color: var(--color-primary);
    background: rgba(255,122,69,0.1);
}

.nav-cta {
    display: flex;
    align-items: center;
}

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

.nav-toggle span {
    width: 24px;
    height: 2.5px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ===== Hero 首屏 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
    padding-top: var(--nav-height);
}

.hero-bg-shapes {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--color-primary);
    top: -100px;
    right: -50px;
    opacity: 0.15;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--color-secondary);
    bottom: -50px;
    left: -50px;
    opacity: 0.12;
    animation-delay: -5s;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--color-accent);
    top: 40%;
    left: 50%;
    opacity: 0.08;
    animation-delay: -10s;
}

.shape-4 {
    width: 150px;
    height: 150px;
    background: var(--color-yellow);
    top: 20%;
    left: 20%;
    opacity: 0.15;
    animation-delay: -7s;
}

.shape-5 {
    width: 180px;
    height: 180px;
    background: var(--color-pink);
    bottom: 20%;
    right: 30%;
    opacity: 0.1;
    animation-delay: -12s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 10px) scale(1.02); }
}

.hero-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
    width: 100%;
}

.hero-content {
    animation: fadeInUp 0.8s ease;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(10px);
    padding: 8px 18px;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-primary);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 20px;
    color: var(--color-text);
}

.hero-subtitle {
    font-size: clamp(15px, 2vw, 18px);
    color: var(--color-text-light);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 28px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.stat-number {
    font-size: 32px;
    font-weight: 900;
    color: var(--color-primary);
    line-height: 1;
    display: inline-block;
}

.stat-plus {
    font-size: 24px;
    font-weight: 900;
    color: var(--color-primary);
    display: inline-block;
}

.stat-label {
    font-size: 13px;
    color: var(--color-text-light);
    margin-top: 4px;
}

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

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease 0.3s both;
}

.hero-mascot {
    width: 100%;
    max-width: 420px;
    filter: drop-shadow(0 20px 40px rgba(255,122,69,0.2));
}

.hero-mascot svg {
    width: 100%;
    height: auto;
}

.float-element {
    transform-origin: center;
    animation: floatIcon 4s ease-in-out infinite;
}

.float-1 { animation-delay: 0s; }
.float-2 { animation-delay: -1s; }
.float-3 { animation-delay: -2s; }
.float-4 { animation-delay: -3s; }

@keyframes floatIcon {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 26px;
    height: 42px;
    border: 2px solid var(--color-text-light);
    border-radius: 14px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
    opacity: 0.5;
}

.scroll-indicator span {
    width: 4px;
    height: 8px;
    background: var(--color-text-light);
    border-radius: 2px;
    animation: scrollDot 2s ease-in-out infinite;
}

@keyframes scrollDot {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(12px); opacity: 0; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ===== 关于我们 ===== */
.about {
    background: var(--color-bg-alt);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content h3 {
    font-size: 26px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--color-text);
}

.about-content p {
    color: var(--color-text-light);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 28px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.about-feature:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.feature-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: #fff;
    flex-shrink: 0;
}

.about-feature:nth-child(2) .feature-icon { background: var(--gradient-secondary); }
.about-feature:nth-child(3) .feature-icon { background: var(--gradient-accent); }
.about-feature:nth-child(4) .feature-icon { background: linear-gradient(135deg, #FFD93D, #FFB800); }

.about-feature span {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
}

.about-card-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.about-card {
    padding: 28px 24px;
    border-radius: var(--radius-lg);
    color: #fff;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(255,255,255,0.15);
}

.about-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.card-orange { background: var(--gradient-primary); }
.card-cyan { background: var(--gradient-secondary); }
.card-purple { background: var(--gradient-accent); }
.card-yellow { background: linear-gradient(135deg, #FFD93D, #FFB800); color: #2C2C2C; }

.card-icon-wrap {
    margin-bottom: 16px;
}

.about-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.about-card p {
    font-size: 14px;
    opacity: 0.9;
}

/* ===== 核心业务 ===== */
.business {
    background: var(--color-bg);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.business-card {
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.business-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.business-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.business-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: #fff;
    transition: transform 0.3s ease;
}

.business-card:hover .business-icon {
    transform: scale(1.1) rotate(-5deg);
}

.icon-orange { background: var(--gradient-primary); box-shadow: var(--shadow-primary); }
.icon-cyan { background: var(--gradient-secondary); box-shadow: var(--shadow-cyan); }
.icon-purple { background: var(--gradient-accent); box-shadow: 0 8px 24px rgba(124,77,255,0.2); }
.icon-yellow { background: linear-gradient(135deg, #FFD93D, #FFB800); box-shadow: 0 8px 24px rgba(255,217,61,0.3); }

.business-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text);
}

.business-card p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

.business-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.business-tags li {
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    background: var(--color-bg);
    color: var(--color-text-light);
}

/* ===== 产品展示 ===== */
.products {
    background: var(--color-bg-alt);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.product-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--color-border);
}

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

.product-image {
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-img-1 { background: linear-gradient(135deg, #1a1a2e, #16213e); }
.product-img-2 { background: linear-gradient(135deg, #FFF0E8, #FFE4D1); }
.product-img-3 { background: linear-gradient(135deg, #F0E8FF, #E4D4FF); }
.product-img-4 { background: linear-gradient(135deg, #E0F7FF, #C0EFFF); }

.product-visual {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.4s ease;
}

.product-card:hover .product-visual {
    transform: scale(1.08);
}

.product-visual svg {
    width: 60%;
    max-width: 200px;
    height: auto;
}

.product-info {
    padding: 24px;
}

.product-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    background: rgba(255,122,69,0.1);
    color: var(--color-primary);
    margin-bottom: 12px;
}

.badge-new { background: rgba(0,184,212,0.1); color: var(--color-secondary); }
.badge-hot { background: rgba(255,107,157,0.1); color: var(--color-pink); }

.product-info h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}

.product-info p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 16px;
}

.product-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.product-specs span {
    font-size: 12px;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    color: var(--color-text-light);
}

/* ===== 企业优势 ===== */
.advantages {
    background: var(--color-bg);
    position: relative;
}

.advantages-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.advantage-item {
    display: flex;
    gap: 24px;
    padding: 32px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.advantage-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s ease;
}

.advantage-item:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
}

.advantage-item:hover::before {
    transform: scaleY(1);
}

.advantage-item:nth-child(2)::before { background: var(--gradient-secondary); }
.advantage-item:nth-child(3)::before { background: var(--gradient-accent); }
.advantage-item:nth-child(4)::before { background: linear-gradient(135deg, #FFD93D, #FFB800); }

.advantage-number {
    font-size: 48px;
    font-weight: 900;
    line-height: 1;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    flex-shrink: 0;
}

.advantage-item:nth-child(2) .advantage-number { background: var(--gradient-secondary); -webkit-background-clip: text; background-clip: text; }
.advantage-item:nth-child(3) .advantage-number { background: var(--gradient-accent); -webkit-background-clip: text; background-clip: text; }
.advantage-item:nth-child(4) .advantage-number { background: linear-gradient(135deg, #FFD93D, #FFB800); -webkit-background-clip: text; background-clip: text; }

.advantage-item:hover .advantage-number {
    opacity: 1;
}

.advantage-content h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}

.advantage-content p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ===== 联系我们 ===== */
.contact {
    background: var(--color-bg-alt);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info .section-header {
    text-align: left;
}

.contact-info .section-desc {
    margin-left: 0;
    margin-bottom: 36px;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: #fff;
    flex-shrink: 0;
    box-shadow: var(--shadow-primary);
}

.contact-item:nth-child(2) .contact-icon { background: var(--gradient-secondary); box-shadow: var(--shadow-cyan); }
.contact-item:nth-child(3) .contact-icon { background: var(--gradient-accent); box-shadow: 0 8px 24px rgba(124,77,255,0.2); }
.contact-item:nth-child(4) .contact-icon { background: linear-gradient(135deg, #FFD93D, #FFB800); box-shadow: 0 8px 24px rgba(255,217,61,0.3); }

.contact-item h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 15px;
    color: var(--color-text-light);
}

.contact-form-wrap {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    padding: 40px;
    border: 1px solid var(--color-border);
}

.contact-form h3 {
    font-size: 24px;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 8px;
}

.form-desc {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.form-group label span {
    color: var(--color-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg-alt);
    color: var(--color-text);
    font-size: 14px;
    transition: all 0.3s ease;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(255,122,69,0.1);
}

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

.form-success {
    display: none;
    margin-top: 16px;
    padding: 12px 16px;
    background: rgba(0,184,212,0.1);
    color: var(--color-secondary);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    text-align: center;
}

.form-success.show {
    display: block;
    animation: fadeInUp 0.4s ease;
}

/* ===== 页脚 ===== */
.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 60px 0 24px;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand .logo-text {
    color: #fff;
}

.footer-desc {
    margin-top: 16px;
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    line-height: 1.7;
    max-width: 320px;
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.7);
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-3px);
}

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

.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 16px;
    color: #fff;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col a {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    transition: all 0.3s ease;
}

.footer-col a:hover {
    color: var(--color-primary);
    padding-left: 4px;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-primary);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(255,122,69,0.4);
}

/* ===== 三有理念 ===== */
.philosophy-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 20px 0;
}

.philosophy-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.philosophy-item:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow-sm);
}

.philosophy-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    font-weight: 900;
    flex-shrink: 0;
}

.philosophy-item p {
    margin: 0;
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
    align-self: center;
}

/* ===== 产品系列 ===== */
.series {
    background: var(--color-bg);
}

.series-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.series-card {
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.series-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.series-chess::before { background: var(--gradient-primary); }
.series-thinking::before { background: var(--gradient-secondary); }
.series-finance::before { background: var(--gradient-accent); }
.series-other::before { background: linear-gradient(135deg, #FFD93D, #FFB800); }

.series-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.series-icon {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: #fff;
    transition: transform 0.3s ease;
}

.series-chess .series-icon { background: var(--gradient-primary); box-shadow: var(--shadow-primary); }
.series-thinking .series-icon { background: var(--gradient-secondary); box-shadow: var(--shadow-cyan); }
.series-finance .series-icon { background: var(--gradient-accent); box-shadow: 0 8px 24px rgba(124,77,255,0.2); }
.series-other .series-icon { background: linear-gradient(135deg, #FFD93D, #FFB800); box-shadow: 0 8px 24px rgba(255,217,61,0.3); }

.series-card:hover .series-icon {
    transform: scale(1.1) rotate(-5deg);
}

.series-card h3 {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 4px;
    color: var(--color-text);
}

.series-en {
    font-size: 12px;
    color: var(--color-text-lighter);
    margin-bottom: 12px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.series-card .series-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 16px;
}

.series-products {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.series-products li {
    font-size: 12px;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    color: var(--color-text-light);
    transition: all 0.2s ease;
}

.series-products li:hover {
    background: var(--color-primary);
    color: #fff;
}

/* ===== 表单下拉框 ===== */
.form-select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg-alt);
    color: var(--color-text);
    font-size: 14px;
    transition: all 0.3s ease;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236B7280' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(255,122,69,0.1);
}

/* ===== AOS 滚动动画 ===== */
[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos="fade-up"] {
    transform: translateY(40px);
}

[data-aos="fade-right"] {
    transform: translateX(-40px);
}

[data-aos="zoom-in"] {
    transform: scale(0.9);
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translate(0, 0) scale(1);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .business-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-content {
        order: 2;
    }

    .hero-visual {
        order: 1;
    }

    .hero-mascot {
        max-width: 320px;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-badge {
        margin-left: auto;
        margin-right: auto;
    }

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

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

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

@media (max-width: 768px) {
    .section {
        padding: 64px 0;
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background: rgba(255,255,255,0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        box-shadow: 0 8px 32px rgba(0,0,0,0.1);
        transform: translateY(-150%);
        transition: transform 0.4s ease;
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-cta {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

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

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

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

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

    .about-card-grid {
        grid-template-columns: 1fr;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 16px;
    }

    .stat-divider {
        display: none;
    }

    .footer-links {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

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

    .advantage-item {
        flex-direction: column;
        gap: 12px;
        padding: 24px;
    }

    .contact-form-wrap {
        padding: 28px 20px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
    }
}

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

    .hero-title {
        font-size: 32px;
    }

    .hero-stats {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .stat-item {
        align-items: center;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}