/* ========== 全局基础与红色主题变量 ========== */
:root {
    --primary: #dc2626;        /* 主红色 */
    --primary-light: #fef2f2;  /* 浅红背景 */
    --primary-dark: #b91c1c;   /* 深红 */
    --text-main: #1f2937;
    --text-sub: #6b7280;
    --bg-body: #f8fafc;
    --neu-light: #ffffff;
    --neu-dark: rgba(220, 38, 38, 0.12);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

/* ========== 新拟态按钮通用样式 ========== */
.btn-neu {
    padding: 10px 24px;
    border: none;
    border-radius: 12px;
    background: var(--primary);
    color: #fff;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    box-shadow: 4px 4px 10px var(--neu-dark),
                -4px -4px 10px var(--neu-light);
    transition: all 0.3s ease;
}

.btn-neu:hover {
    background: var(--primary-dark);
    box-shadow: 2px 2px 6px var(--neu-dark),
                -2px -2px 6px var(--neu-light);
    transform: translateY(1px);
}

/* ========== 头部导航 ========== */
header {
    position: sticky;
    top: 0;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 6%;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(220, 38, 38, 0.08);
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-main);
    font-size: 15px;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary);
}

/* ========== 首屏Hero区 ========== */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    padding: 0 6%;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    z-index: 0;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #fca5a5, #ef4444);
    top: 10%;
    left: -5%;
    animation: float 8s ease-in-out infinite;
}

.blob-2 {
    width: 350px;
    height: 350px;
    background: linear-gradient(135deg, #fecaca, #dc2626);
    bottom: 10%;
    right: -5%;
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-30px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 650px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-h1 {
    font-size: 52px;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--text-main);
}

.hero-h1 span {
    color: var(--primary);
}

.hero-desc {
    font-size: 17px;
    color: var(--text-sub);
    margin-bottom: 36px;
    max-width: 560px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

/* ========== 双轨价值区 ========== */
.dual-value {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    padding: 80px 6%;
}

.dual-side {
    padding: 40px;
    border-radius: 20px;
    background: #fff;
    box-shadow: 8px 8px 20px var(--neu-dark),
                -8px -8px 20px var(--neu-light);
    transition: transform 0.3s;
}

.dual-side:hover {
    transform: translateY(-6px);
}

.value-icon {
    font-size: 42px;
    margin-bottom: 20px;
}

.value-h2 {
    font-size: 26px;
    margin-bottom: 12px;
    color: var(--text-main);
}

.value-p {
    color: var(--text-sub);
    margin-bottom: 20px;
}

.feature-list li {
    padding: 8px 0;
    color: var(--text-main);
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.check-icon {
    color: var(--primary);
    font-weight: bold;
    flex-shrink: 0;
}

/* ========== 任务生态雷达区 ========== */
.ecosystem {
    padding: 80px 6%;
    text-align: center;
}

.sec-h2 {
    font-size: 34px;
    margin-bottom: 12px;
    color: var(--text-main);
}

.sec-sub {
    color: var(--text-sub);
    margin-bottom: 60px;
    font-size: 16px;
}

.orbit-container {
    position: relative;
    width: 500px;
    height: 500px;
    margin: 0 auto;
    border: 2px dashed rgba(220, 38, 38, 0.2);
    border-radius: 50%;
}

.orbit-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 6px 6px 16px var(--neu-dark),
                -6px -6px 16px var(--neu-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.orbit-center h3 {
    color: var(--primary);
    font-size: 18px;
}

.orbit-item {
    position: absolute;
    width: 110px;
    padding: 16px 8px;
    border-radius: 16px;
    background: #fff;
    box-shadow: 4px 4px 12px var(--neu-dark),
                -4px -4px 12px var(--neu-light);
    text-align: center;
    transition: all 0.3s;
}

.orbit-item:hover {
    transform: scale(1.08);
    border: 1px solid var(--primary);
}

.orb-1 { top: 10%; left: 50%; transform: translateX(-50%); }
.orb-2 { top: 30%; right: 5%; }
.orb-3 { bottom: 30%; right: 5%; }
.orb-4 { bottom: 10%; left: 50%; transform: translateX(-50%); }
.orb-5 { bottom: 30%; left: 5%; }
.orb-6 { top: 30%; left: 5%; }

.orbit-item strong {
    display: block;
    color: var(--text-main);
    font-size: 14px;
}

/* ========== 信任数据仪表盘 ========== */
.trust-dash {
    padding: 80px 6%;
    background: var(--primary-light);
}

.dash-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1100px;
    margin: 0 auto;
}

.dash-card {
    padding: 36px 24px;
    border-radius: 16px;
    background: #fff;
    text-align: center;
    box-shadow: 6px 6px 16px var(--neu-dark),
                -6px -6px 16px var(--neu-light);
}

.dash-label {
    color: var(--text-sub);
    font-size: 15px;
    margin-bottom: 12px;
}

.dash-number {
    font-size: 42px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}

.dash-desc {
    color: var(--text-sub);
    font-size: 14px;
    line-height: 1.5;
}

/* ========== FAQ答疑区 ========== */
.faq-section {
    padding: 80px 6%;
}

.faq-item {
    margin-bottom: 16px;
    border-radius: 12px;
    background: #fff;
    box-shadow: 3px 3px 10px var(--neu-dark),
                -3px -3px 10px var(--neu-light);
    overflow: hidden;
}

.faq-q {
    padding: 18px 24px;
    cursor: pointer;
    font-weight: 500;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-main);
    transition: color 0.3s;
}

.faq-q:hover {
    color: var(--primary);
}

.faq-item.active .faq-q {
    color: var(--primary);
}

.arrow {
    color: var(--primary);
    transition: transform 0.3s;
}

.faq-item:not(.active) .arrow {
    transform: rotate(-90deg);
    color: var(--text-sub);
}

.faq-a {
    padding: 0 24px 20px;
    color: var(--text-sub);
    font-size: 15px;
    line-height: 1.7;
    display: none;
}

.faq-item.active .faq-a {
    display: block;
}

/* ========== 底部Footer ========== */
footer {
    background: #7f1d1d;
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 6% 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-grid h4 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 16px;
}

.footer-link {
    display: block;
    padding: 6px 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: color 0.3s;
}

.footer-link:hover {
    color: #fecaca;
}

footer p {
    font-size: 14px;
    line-height: 1.7;
}

/* ========== 响应式适配 ========== */
@media (max-width: 900px) {
    .dual-value,
    .dash-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .hero-h1 {
        font-size: 36px;
    }

    .orbit-container {
        width: 360px;
        height: 360px;
    }

    .orbit-item {
        width: 90px;
        padding: 10px 4px;
    }

    .nav-links a:not(.btn-neu) {
        display: none;
    }
}