* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: #f0f2f5;
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
    color: #374151;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.12);
    overflow: hidden;
}

/* ========== 导航 ========== */
.header {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    padding: 40px 30px;
    color: white;
    text-align: center;
}

.site-title {
    font-size: 2.2em;
    margin-bottom: 18px;
    font-weight: 800;
    letter-spacing: 1px;
}

.nav {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 8px 20px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    transition: all 0.3s;
    font-weight: 500;
    font-size: 0.95em;
}

.nav-link:hover,
.nav-link.active {
    background: white;
    color: #6366f1;
}

/* ========== Hero ========== */
.hero {
    padding: 60px 40px 50px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-slogan {
    font-size: 1.2em;
    opacity: 0.9;
    margin-bottom: 28px;
    letter-spacing: 1px;
    font-weight: 500;
    position: relative;
    z-index: 1;
}

.hero-search {
    max-width: 520px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-search-input {
    background: rgba(255, 255, 255, 0.18);
    border: 2px solid rgba(255, 255, 255, 0.25);
    color: white;
    font-size: 1em;
    padding: 14px 28px;
}

.hero-search-input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.hero-search-input:focus {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* ========== 通用搜索 ========== */
.search-bar {
    padding: 20px 30px 0;
    display: flex;
    justify-content: center;
}

.search-input {
    width: 100%;
    max-width: 500px;
    padding: 14px 24px;
    border: 2px solid #e5e7eb;
    border-radius: 30px;
    font-size: 1em;
    outline: none;
    transition: all 0.3s;
    color: #374151;
}

.search-input:focus {
    border-color: #6366f1;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.15);
}

.search-input::placeholder {
    color: #9ca3af;
}

.main {
    padding: 40px 30px;
}

/* ========== 通用标题 ========== */
.section-heading {
    font-size: 1.6em;
    font-weight: 800;
    color: #111827;
    text-align: center;
    margin-bottom: 36px;
    letter-spacing: -0.01em;
}

/* ========== 服务分类标签条 ========== */
.category-nav {
    display: flex;
    justify-content: center;
    gap: 12px;
    padding: 20px 30px;
    background: #ffffff;
    border-bottom: 1px solid #f1f5f9;
    flex-wrap: wrap;
}

.category-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95em;
    transition: all 0.3s;
    border: 1.5px solid transparent;
    position: relative;
}

.category-tag-icon {
    font-size: 1.15em;
    line-height: 1;
}

.category-tag-name {
    color: #374151;
}

.category-tag-count {
    font-size: 0.82em;
    font-weight: 500;
    color: #9ca3af;
    margin-left: 2px;
}

.category-tag--software {
    background: #eff6ff;
    border-color: #dbeafe;
}
.category-tag--software:hover {
    background: #dbeafe;
    border-color: #93c5fd;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.15);
}

.category-tag--troubleshooting {
    background: #fef2f2;
    border-color: #fecaca;
}
.category-tag--troubleshooting:hover {
    background: #fecaca;
    border-color: #f87171;
    box-shadow: 0 4px 16px rgba(239, 68, 68, 0.15);
}

.category-tag--cloud {
    background: #eef2ff;
    border-color: #e0e7ff;
}
.category-tag--cloud:hover {
    background: #e0e7ff;
    border-color: #818cf8;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.15);
}

.category-tag--math {
    background: #fff7ed;
    border-color: #fed7aa;
}
.category-tag--math:hover {
    background: #fed7aa;
    border-color: #fb923c;
    box-shadow: 0 4px 16px rgba(249, 115, 22, 0.15);
}

.category-tag--self-hosted {
    background: #f0fdf4;
    border-color: #bbf7d0;
}
.category-tag--self-hosted:hover {
    background: #bbf7d0;
    border-color: #4ade80;
    box-shadow: 0 4px 16px rgba(34, 197, 94, 0.15);
}

/* ========== 亲民定价信任条 ========== */
.pricing-trust-section {
    padding: 36px 40px 32px;
    background: linear-gradient(to right, #f9fafb, #f3f4f6, #f9fafb);
    border-bottom: 1px solid #e5e7eb;
}
.pricing-trust-inner {
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
}
.pricing-trust-badge {
    display: inline-block;
    background: #374151;
    color: #f9fafb;
    padding: 5px 18px;
    border-radius: 4px;
    font-size: 0.85em;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 16px;
}
.pricing-trust-headline {
    font-size: 1.55em;
    font-weight: 800;
    color: #111827;
    margin: 0 0 12px;
}
.pricing-trust-desc {
    font-size: 1em;
    color: #6b7280;
    line-height: 1.8;
    margin: 0 0 24px;
}
.pricing-trust-examples {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}
.pricing-example {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 14px 20px 12px;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    min-width: 110px;
}
.pricing-example-label {
    font-size: 0.88em;
    color: #6b7280;
    font-weight: 500;
    margin-bottom: 4px;
}
.pricing-example-price {
    font-size: 1.3em;
    font-weight: 800;
    color: #111827;
}
.pricing-example-price small {
    font-size: 0.6em;
    font-weight: 500;
    color: #9ca3af;
}

/* ========== 服务流程横条 ========== */
.flow-section {
    padding: 30px 40px;
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 50%, #f5f3ff 100%);
}

.flow-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 700px;
    margin: 0 auto;
}

.flow-item {
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
}

.flow-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    border-radius: 50%;
    font-weight: 800;
    font-size: 0.85em;
    flex-shrink: 0;
}

.flow-text {
    font-size: 0.95em;
    font-weight: 600;
    color: #374151;
}

.flow-line {
    flex: 1;
    height: 2px;
    background: linear-gradient(90deg, #c4b5fd, #a78bfa);
    margin: 0 12px;
    min-width: 30px;
}

/* ========== 精选服务 ========== */
.featured-section {
    padding: 50px 40px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.card {
    background: white;
    border: none;
    border-radius: 14px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 12px rgba(0, 0, 0, 0.04);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(99, 102, 241, 0.15);
}

.card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.card-content {
    padding: 20px;
}

.card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.card-category {
    padding: 3px 10px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    border-radius: 8px;
    font-size: 0.78em;
    font-weight: 600;
}

.card-price {
    font-size: 1.1em;
    font-weight: 800;
    color: #ef4444;
}

.card-title {
    font-size: 1.05em;
    margin-bottom: 8px;
    color: #111827;
    font-weight: 700;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-summary {
    color: #9ca3af;
    font-size: 0.88em;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 14px;
    border-top: 1px solid #f3f4f6;
}

.view-detail {
    color: #6366f1;
    font-weight: 600;
    font-size: 0.92em;
}

.view-all-wrap {
    text-align: center;
    margin-top: 32px;
}

.btn-outline {
    display: inline-block;
    padding: 12px 32px;
    border: 2px solid #6366f1;
    color: #6366f1;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s;
}

.btn-outline:hover {
    background: #6366f1;
    color: white;
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.3);
}

/* ========== 承诺横条 ========== */
.promise-bar {
    display: flex;
    justify-content: center;
    gap: 40px;
    padding: 24px 40px;
    background: #f8fafc;
    border-top: 1px solid #f1f5f9;
    flex-wrap: wrap;
}

.promise-item {
    font-size: 0.95em;
    font-weight: 600;
    color: #374151;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ========== 页脚 ========== */
.footer {
    background: #f8fafc;
    padding: 24px;
    text-align: center;
    color: #9ca3af;
    border-top: 1px solid #f1f5f9;
    font-size: 0.95em;
}

/* ========== 橱窗展示区 ========== */
.showcase-container {
    display: flex;
    justify-content: center;
    padding: 40px 20px;
    background: white;
}

.showcase-square {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    border-radius: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 50px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.3);
    position: relative;
    overflow: hidden;
}

.showcase-square::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.showcase-icon {
    font-size: 90px;
    margin-bottom: 25px;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.2));
    flex-shrink: 0;
}

.showcase-title {
    font-size: 36px;
    font-weight: 800;
    color: white;
    margin-bottom: 20px;
    line-height: 1.3;
    position: relative;
    z-index: 1;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    max-width: 100%;
    word-wrap: break-word;
}

.showcase-desc {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.95);
    line-height: 1.6;
    margin-bottom: 35px;
    max-width: 480px;
    position: relative;
    z-index: 1;
}

.showcase-tag {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    color: white;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 25px;
    position: relative;
    z-index: 1;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.showcase-footer {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    z-index: 1;
    font-weight: 600;
    letter-spacing: 2px;
}

/* ========== 商品信息区（左图右信息） ========== */
.product-info-area {
    display: flex;
    gap: 40px;
    padding: 30px;
    background: white;
    align-items: flex-start;
}

.product-showcase {
    flex-shrink: 0;
    padding: 0;
}

.product-meta {
    flex: 1;
    min-width: 0;
}

.product-category-tag {
    display: inline-block;
    padding: 4px 14px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    border-radius: 14px;
    font-size: 0.85em;
    margin-bottom: 14px;
    font-weight: 600;
}

.product-title {
    font-size: 1.5em;
    font-weight: 800;
    color: #111827;
    margin-bottom: 20px;
    line-height: 1.4;
}

.price-box {
    background: linear-gradient(to right, #fef2f2, #fff1f2);
    padding: 18px 24px;
    border-radius: 14px;
    margin-bottom: 24px;
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.price-symbol { font-size: 1.3em; font-weight: 700; color: #ef4444; }
.price-value { font-size: 2.8em; font-weight: 800; color: #ef4444; line-height: 1; }
.price-unit { font-size: 1.2em; font-weight: 700; color: #ef4444; }
.price-original { font-size: 1em; color: #9ca3af; text-decoration: line-through; margin-left: 12px; }
.price-discount { background: #ef4444; color: white; padding: 2px 10px; border-radius: 10px; font-size: 0.8em; font-weight: 600; margin-left: 8px; }

.package-section { margin-bottom: 24px; }
.package-label { font-size: 0.95em; color: #6b7280; margin-bottom: 10px; }
.package-options { display: flex; gap: 12px; flex-wrap: wrap; }

.package-option {
    display: flex; flex-direction: column; align-items: center;
    padding: 14px 24px; border: 2px solid #e5e7eb; border-radius: 12px;
    cursor: pointer; transition: all 0.3s; position: relative; min-width: 140px;
}
.package-option input { display: none; }
.package-option:hover { border-color: #6366f1; }
.package-option.active { border-color: #6366f1; background: rgba(99, 102, 241, 0.05); box-shadow: 0 0 0 1px #6366f1; }
.package-name { font-weight: 700; color: #111827; margin-bottom: 6px; }
.package-price { color: #ef4444; font-weight: 700; font-size: 1.2em; margin-bottom: 4px; }
.package-desc { color: #9ca3af; font-size: 0.85em; }

.product-params {
    display: flex; gap: 24px; padding: 16px 0;
    border-top: 1px solid #f3f4f6; border-bottom: 1px solid #f3f4f6;
    margin-bottom: 24px; flex-wrap: wrap;
}
.param-item { display: flex; align-items: center; gap: 8px; }
.param-label { color: #9ca3af; font-size: 0.9em; }
.param-value { color: #374151; font-weight: 600; font-size: 0.95em; }

.product-actions { display: flex; gap: 14px; }
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 14px 32px; border-radius: 25px; font-size: 1.05em;
    font-weight: 600; text-decoration: none; transition: all 0.3s; cursor: pointer; border: none;
}
.btn-contact { background: white; color: #6366f1; border: 2px solid #6366f1; }
.btn-contact:hover { background: rgba(99, 102, 241, 0.05); }
.btn-buy {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white; box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}
.btn-buy:hover { box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5); transform: translateY(-1px); }

.guarantee-bar {
    display: flex; justify-content: center; gap: 32px;
    padding: 18px 30px;
    background: linear-gradient(to right, #f0fdf4, #f0f9ff, #faf5ff);
    border-top: 1px solid #e5e7eb; border-bottom: 1px solid #e5e7eb; flex-wrap: wrap;
}
.guarantee-item { font-size: 0.95em; color: #374151; font-weight: 500; }

.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.related-card {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px; background: white; border: 1px solid #f1f5f9;
    border-radius: 12px; text-decoration: none; color: #374151;
    font-weight: 500; transition: all 0.3s;
}
.related-card:hover { border-color: #6366f1; box-shadow: 0 4px 12px rgba(99, 102, 241, 0.1); transform: translateX(4px); }
.related-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.related-arrow { color: #6366f1; font-weight: 700; flex-shrink: 0; margin-left: 10px; }

/* ========== 商品详情页 ========== */
.detail-page { background: white; }
.detail-header { background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%); padding: 50px 40px; color: white; }
.breadcrumb { font-size: 0.95em; margin-bottom: 10px; opacity: 0.95; }
.breadcrumb a { color: white; text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.detail-title { font-size: 2.8em; font-weight: 800; line-height: 1.2; text-align: center; }
.detail-main { padding: 50px 60px; max-width: 1000px; }
.detail-section { margin-bottom: 45px; }
.section-title {
    display: flex; align-items: center; gap: 12px; font-size: 1.9em;
    margin-bottom: 24px; color: #111827; padding-bottom: 14px;
    border-bottom: 3px solid #6366f1; font-weight: 700;
}
.section-icon { font-size: 1.1em; }
.section-content {
    padding: 28px 32px; background: linear-gradient(to bottom, #f9fafb, #ffffff);
    border-radius: 16px; line-height: 1.9; font-size: 1.08em;
    color: #374151; border: 1px solid #f1f5f9;
}
.section-content ul, .section-content ol { margin-left: 28px; margin-top: 16px; }
.section-content li { margin-bottom: 10px; }
.section-content p { margin-bottom: 14px; }
.section-content strong { color: #6366f1; font-weight: 600; }

.process-list { display: flex; flex-direction: column; gap: 18px; }
.process-item {
    display: flex; align-items: flex-start; gap: 20px;
    padding: 24px 28px; background: white; border: 1px solid #f1f5f9;
    border-radius: 16px; transition: all 0.3s; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.process-item:hover { border-color: #6366f1; box-shadow: 0 6px 20px rgba(99, 102, 241, 0.12); transform: translateX(4px); }
.process-number {
    flex-shrink: 0; width: 42px; height: 42px; display: flex;
    align-items: center; justify-content: center;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white; border-radius: 50%; font-weight: 700; font-size: 1.2em;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}
.process-text { flex: 1; padding-top: 8px; color: #374151; font-size: 1.08em; line-height: 1.7; }

.cta-section {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white; padding: 38px 42px; border-radius: 16px;
    text-align: center; margin-top: 50px; box-shadow: 0 8px 24px rgba(99, 102, 241, 0.25);
}
.cta-text { font-size: 1.4em; font-weight: 600; line-height: 1.5; }
.detail-footer {
    background: linear-gradient(to bottom, #f8fafc, #ffffff);
    padding: 28px; text-align: center; color: #9ca3af;
    border-top: 1px solid #f1f5f9; font-size: 1em; margin-top: 20px;
}

/* ========== 关于我们 ========== */
.about-section { background: linear-gradient(to bottom, #ffffff, #f8fafc); padding: 60px 40px; border-top: 1px solid #f1f5f9; }
.about-container { max-width: 1000px; margin: 0 auto; }
.about-title {
    font-size: 2.5em; font-weight: 800; color: #111827; text-align: center;
    margin-bottom: 12px; background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.about-subtitle { font-size: 1.3em; color: #6b7280; text-align: center; margin-bottom: 50px; font-weight: 500; }
.about-content { display: flex; flex-direction: column; gap: 50px; margin-bottom: 40px; }
.about-text { text-align: center; max-width: 800px; margin: 0 auto; }
.about-description { font-size: 1.15em; line-height: 2; color: #374151; margin-bottom: 20px; }
.about-description strong { color: #6366f1; font-weight: 600; }
.about-values { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 28px; }
.value-item {
    background: white; padding: 32px 24px; border-radius: 16px; text-align: center;
    border: none; transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 12px rgba(0, 0, 0, 0.04);
}
.value-item:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(99, 102, 241, 0.15); }
.value-icon { font-size: 3em; margin-bottom: 16px; }
.value-title { font-size: 1.3em; font-weight: 700; color: #111827; margin-bottom: 12px; }
.value-desc { font-size: 1em; line-height: 1.7; color: #6b7280; }
.about-motto {
    text-align: center; padding: 28px 32px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
    border-radius: 16px; border: 1px solid rgba(99, 102, 241, 0.15);
}
.about-motto p { font-size: 1.35em; font-weight: 600; color: #6366f1; font-style: italic; margin: 0; line-height: 1.6; }

/* ========== 关于我们（专属布局） ========== */
.about-hero {
    position: relative;
    padding: 70px 40px;
    background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 40%, #ede9fe 100%);
    text-align: center;
    overflow: hidden;
}
.about-hero-decor {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}
.about-hero-decor-1 {
    width: 300px; height: 300px;
    top: -80px; right: -60px;
    background: radial-gradient(circle, rgba(99,102,241,0.12) 0%, transparent 70%);
}
.about-hero-decor-2 {
    width: 200px; height: 200px;
    bottom: -50px; left: -40px;
    background: radial-gradient(circle, rgba(168,85,247,0.1) 0%, transparent 70%);
}
.about-hero-title {
    font-size: 2.8em;
    font-weight: 800;
    background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
}
.about-hero-tagline {
    font-size: 1.35em;
    color: #6b7280;
    font-weight: 500;
    position: relative;
    z-index: 1;
}

.about-mission {
    padding: 56px 40px;
    background: #ffffff;
}
.about-mission-inner {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}
.about-mission-text {
    font-size: 1.15em;
    line-height: 2;
    color: #374151;
    margin-bottom: 18px;
}
.about-mission-text:last-child { margin-bottom: 0; }
.about-mission-text strong { color: #6366f1; font-weight: 600; }

.about-values-section {
    padding: 56px 40px;
    background: linear-gradient(to bottom, #f8fafc, #ffffff);
}
.about-section-title {
    font-size: 2em;
    font-weight: 800;
    color: #111827;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}
.about-section-title::after {
    content: '';
    display: block;
    width: 48px;
    height: 4px;
    background: linear-gradient(135deg, #6366f1, #a855f7);
    border-radius: 2px;
    margin: 14px auto 0;
}
.about-values-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}
.about-value-card {
    background: #ffffff;
    border-radius: 18px;
    padding: 36px 28px;
    text-align: center;
    border: 1px solid #f1f5f9;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.03);
    transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
}
.about-value-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 36px rgba(99,102,241,0.15);
    border-color: rgba(99,102,241,0.2);
}
.about-value-icon {
    width: 72px; height: 72px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 2em;
    margin-bottom: 18px;
}
.about-value-icon--blue   { background: linear-gradient(135deg, #dbeafe, #eff6ff); }
.about-value-icon--purple { background: linear-gradient(135deg, #ede9fe, #f5f3ff); }
.about-value-icon--orange { background: linear-gradient(135deg, #ffedd5, #fff7ed); }
.about-value-icon--green  { background: linear-gradient(135deg, #dcfce7, #f0fdf4); }
.about-value-name {
    font-size: 1.3em;
    font-weight: 700;
    color: #111827;
    margin-bottom: 10px;
}
.about-value-desc {
    font-size: 1em;
    line-height: 1.7;
    color: #6b7280;
}

.about-promise-section {
    padding: 56px 40px;
    background: #ffffff;
}
.about-promise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
}
.about-promise-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 28px 24px;
    background: linear-gradient(to bottom, #f9fafb, #ffffff);
    border: 1px solid #f1f5f9;
    border-radius: 16px;
    transition: all 0.35s;
}
.about-promise-item:hover {
    border-color: rgba(99,102,241,0.25);
    box-shadow: 0 6px 20px rgba(99,102,241,0.1);
    transform: translateX(4px);
}
.about-promise-num {
    flex-shrink: 0;
    width: 44px; height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    border-radius: 12px;
    font-weight: 800;
    font-size: 1.1em;
    box-shadow: 0 4px 12px rgba(99,102,241,0.25);
}
.about-promise-body h3 {
    font-size: 1.15em;
    font-weight: 700;
    color: #111827;
    margin-bottom: 6px;
}
.about-promise-body p {
    font-size: 0.95em;
    color: #6b7280;
    line-height: 1.6;
    margin: 0;
}

.about-cta-section {
    padding: 64px 40px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.about-cta-section::before {
    content: '';
    position: absolute;
    width: 400px; height: 400px;
    top: -120px; right: -80px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
}
.about-cta-inner {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
}
.about-cta-title {
    font-size: 2em;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 16px;
}
.about-cta-desc {
    font-size: 1.15em;
    color: rgba(255,255,255,0.92);
    line-height: 1.7;
    margin-bottom: 8px;
}
.about-cta-sub {
    font-size: 1.05em;
    color: rgba(255,255,255,0.8);
    margin-bottom: 32px;
}
.about-cta-btn {
    display: inline-block;
    padding: 14px 40px;
    background: #ffffff;
    color: #6366f1;
    border-radius: 30px;
    font-size: 1.1em;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.about-cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(0,0,0,0.2);
}

.about-motto-section {
    padding: 48px 40px;
    background: linear-gradient(to bottom, #ffffff, #f8fafc);
    text-align: center;
}
.about-motto-quote {
    font-size: 1.4em;
    font-weight: 600;
    color: #6366f1;
    font-style: italic;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
    padding: 28px 36px;
    background: linear-gradient(135deg, rgba(99,102,241,0.06) 0%, rgba(139,92,246,0.06) 100%);
    border-radius: 16px;
    border: 1px solid rgba(99,102,241,0.12);
}

/* ========== 独立页面 ========== */
.page-container { max-width: 800px; margin: 0 auto; }
.page-header { background: #f8fafc; padding: 60px 40px; text-align: center; color: #111827; }
.page-header-content { max-width: 600px; margin: 0 auto; }
.page-title { font-size: 2.8em; font-weight: 800; margin-bottom: 16px; }
.page-subtitle { font-size: 1.3em; opacity: 0.95; font-weight: 400; margin: 0; }
.page-main { padding: 50px 40px; background: #f8fafc; }
.page-main h2 { font-size: 2em; font-weight: 700; color: #111827; margin-top: 50px; margin-bottom: 24px; padding-bottom: 12px; border-bottom: 3px solid #6366f1; }
.page-main h2:first-of-type { margin-top: 0; }
.page-main h3 { font-size: 1.5em; font-weight: 600; color: #374151; margin-top: 35px; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.page-main p { font-size: 1.1em; line-height: 1.9; color: #4b5563; margin-bottom: 20px; }
.page-main strong { color: #6366f1; font-weight: 600; }
.page-main ul { list-style: none; padding: 0; margin: 30px 0; }
.page-main ul li {
    padding: 18px 24px; margin-bottom: 16px; background: white;
    border: 1px solid #f1f5f9; border-radius: 12px; font-size: 1.05em;
    line-height: 1.7; color: #374151; transition: all 0.3s;
}
.page-main ul li:hover { border-color: #6366f1; box-shadow: 0 4px 12px rgba(99, 102, 241, 0.1); transform: translateX(4px); }
.page-main ul li strong { color: #6366f1; display: inline-block; min-width: 100px; }
.page-main > p:first-of-type {
    font-size: 1.25em; line-height: 2; color: #374151; text-align: center; padding: 30px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    border-radius: 16px; border: 1px solid rgba(99, 102, 241, 0.1); margin-bottom: 40px;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    body { padding: 10px; }
    .site-title, .detail-title { font-size: 1.8em; }
    .hero { padding: 40px 20px 35px; }
    .hero-slogan { font-size: 1em; }

    .category-nav { padding: 16px 16px; gap: 8px; }
    .category-tag { padding: 8px 14px; font-size: 0.88em; }
    .category-tag-count { display: none; }
    .pricing-trust-section { padding: 28px 20px 24px; }
    .pricing-trust-headline { font-size: 1.25em; }
    .pricing-trust-desc { font-size: 0.92em; }
    .pricing-trust-examples { gap: 10px; }
    .pricing-example { min-width: 90px; padding: 10px 14px; }
    .pricing-example-price { font-size: 1.1em; }
    .card-grid { grid-template-columns: 1fr; }

    .flow-bar { flex-direction: column; gap: 8px; align-items: stretch; }
    .flow-item { justify-content: center; }
    .flow-line { height: 0; width: 2px; min-width: auto; min-height: 16px; margin: 0 auto; }

    .promise-bar { gap: 16px; padding: 20px; }

    .detail-main { padding: 24px 20px; }
    .section-title { font-size: 1.4em; }
    .section-heading { font-size: 1.4em; margin-bottom: 28px; }
    .nav { gap: 8px; }
    .nav-link { padding: 6px 14px; font-size: 0.85em; }

    .product-info-area { flex-direction: column; padding: 20px; }
    .product-showcase { width: 100%; }
    .product-showcase .showcase-square { width: 100%; max-width: 400px; height: auto; aspect-ratio: 1 / 1; padding: 30px 20px; margin: 0 auto; }
    .product-title { font-size: 1.4em; }
    .price-value { font-size: 2.2em; }
    .package-options { flex-direction: column; }
    .package-option { flex-direction: row; gap: 12px; min-width: auto; justify-content: flex-start; }
    .product-actions { flex-direction: column; }
    .btn { width: 100%; justify-content: center; }
    .guarantee-bar { gap: 16px; padding: 14px 20px; }
    .product-params { flex-direction: column; gap: 10px; }
    .related-grid { grid-template-columns: 1fr; }

    .featured-section { padding: 40px 20px; }
    .flow-section { padding: 24px 20px; }

    .about-section { padding: 40px 20px; }
    .about-title { font-size: 2em; }
    .about-subtitle { font-size: 1.1em; margin-bottom: 30px; }
    .about-values { grid-template-columns: 1fr; gap: 20px; }
    .about-motto p { font-size: 1.15em; }

    .page-container { margin: 0; }
    .page-header { padding: 50px 30px 40px; }
    .page-title { font-size: 2.2em; }
    .page-main { padding: 35px 25px; }
    .page-main h2 { font-size: 1.7em; margin-top: 40px; }
    .page-main ul li strong { display: block; margin-bottom: 4px; }

    .about-hero { padding: 50px 20px; }
    .about-hero-title { font-size: 2em; }
    .about-hero-tagline { font-size: 1.1em; }
    .about-mission { padding: 40px 20px; }
    .about-mission-text { font-size: 1.05em; }
    .about-values-section { padding: 40px 20px; }
    .about-section-title { font-size: 1.6em; margin-bottom: 28px; }
    .about-values-grid { grid-template-columns: 1fr; gap: 16px; }
    .about-value-card { padding: 28px 20px; }
    .about-promise-section { padding: 40px 20px; }
    .about-promise-grid { grid-template-columns: 1fr; gap: 14px; }
    .about-cta-section { padding: 48px 20px; }
    .about-cta-title { font-size: 1.6em; }
    .about-motto-section { padding: 36px 20px; }
    .about-motto-quote { font-size: 1.15em; padding: 20px 24px; }
}