/* ============================================
   木兰序 partner.html 商业合作页样式
   ============================================ */

/* 统一容器宽度与首页保持一致（1400px，含 4rem 横向内边距，匹配首页正文区） */
.partner-section .section-container,
.chain-section .section-container,
.flow-section .section-container,
.partner-contact-section .section-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 4rem;
    box-sizing: border-box;
    width: 100%;
}

/* Hero 复用现有 hero-section */
.hero-partner {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    text-align: center;
    padding: 8rem 4rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
}

.hero-partner .hero-content {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    text-align: center;
}

.hero-partner .hero-title { text-align: center; }
.hero-partner .hero-tag { display: inline-block; }
.hero-partner .hero-desc { margin-left: auto; margin-right: auto; }
.hero-partner .hero-actions { justify-content: center; }

/* ==================== 合作方向卡片 ==================== */
.partner-section {
    padding: 6rem 0;
    position: relative;
}

.partner-section .section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 760px;
    margin: 1.5rem auto 0;
    line-height: 1.7;
}

.partner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 1.75rem;
    margin-top: 4rem;
}

.partner-card {
    position: relative;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: 2.5rem 2rem 2rem;
    transition: all 0.5s var(--ease-out-expo);
    overflow: hidden;
}

.partner-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient-main);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.partner-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg), var(--shadow-glow-purple);
}

.partner-card:hover::before { opacity: 1; }

.partner-card.card-highlight {
    background: linear-gradient(160deg, rgba(217, 70, 239, 0.06) 0%, var(--bg-surface) 60%);
    border-color: rgba(217, 70, 239, 0.25);
}

.partner-num {
    position: absolute;
    top: 1.5rem;
    right: 1.75rem;
    font-family: var(--font-mono);
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--text-muted);
    opacity: 0.18;
    line-height: 1;
    letter-spacing: -0.02em;
}

.partner-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 16px;
    margin-bottom: 1.25rem;
    background: var(--bg-glass-strong);
    border: 1px solid var(--border-subtle);
    transition: all 0.4s ease;
}

.partner-icon svg { width: 32px; height: 32px; }

.partner-icon.icon-purple { color: var(--accent-purple); }
.partner-icon.icon-cyan { color: var(--accent-cyan); }
.partner-icon.icon-orange { color: var(--accent-orange); }
.partner-icon.icon-pink { color: var(--accent-pink); }

.partner-card:hover .partner-icon { transform: scale(1.06) rotate(-3deg); }

.partner-card h3 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    letter-spacing: 0.02em;
}

.partner-target {
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.6;
    padding-bottom: 1rem;
    border-bottom: 1px dashed var(--border-subtle);
}

.partner-target strong { color: var(--accent-cyan); }

.partner-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.partner-list li {
    position: relative;
    padding: 0.55rem 0 0.55rem 1.6rem;
    font-size: 0.93rem;
    line-height: 1.65;
    color: var(--text-secondary);
}

.partner-list li::before {
    content: '◆';
    position: absolute;
    left: 0;
    top: 0.55rem;
    color: var(--accent-purple);
    font-size: 0.65rem;
}

.partner-list li strong { color: var(--text-primary); font-weight: 600; }

.partner-cities {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px dashed var(--border-subtle);
}

.city-pill {
    font-size: 0.8rem;
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-family: var(--font-body);
    letter-spacing: 0.04em;
    transition: all 0.3s ease;
}

.city-pill:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    background: rgba(34, 211, 238, 0.08);
}

/* ==================== 产业链图谱 ==================== */
.chain-section {
    padding: 6rem 0;
    background: linear-gradient(180deg, transparent 0%, rgba(217, 70, 239, 0.03) 50%, transparent 100%);
    position: relative;
}

.chain-map {
    display: grid;
    grid-template-columns: 1fr 1.1fr 1fr;
    gap: 1.5rem;
    margin-top: 4rem;
    align-items: stretch;
}

.chain-col {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chain-col-header {
    text-align: center;
    margin-bottom: 1rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
}

.chain-col-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    padding: 0.3rem 0.85rem;
    border-radius: 999px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    margin-bottom: 0.6rem;
}

.chain-col-badge.badge-mid {
    background: linear-gradient(135deg, rgba(217, 70, 239, 0.18), rgba(34, 211, 238, 0.18));
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.chain-col-header h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.04em;
}

.chain-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 14px;
    padding: 1.5rem 1.25rem;
    transition: all 0.4s var(--ease-out-expo);
    text-align: center;
    flex: 1;
}

.chain-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.chain-card-mid {
    background: linear-gradient(160deg, rgba(217, 70, 239, 0.08) 0%, var(--bg-surface) 70%);
    border-color: rgba(217, 70, 239, 0.2);
}

.chain-icon {
    display: inline-block;
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    filter: drop-shadow(0 0 8px rgba(217, 70, 239, 0.3));
}

.chain-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
    letter-spacing: 0.03em;
}

.chain-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0.2rem 0;
}

.chain-value {
    color: var(--accent-cyan) !important;
    font-size: 0.78rem !important;
    font-weight: 500;
    letter-spacing: 0.02em;
    margin-top: 0.4rem !important;
}

/* ==================== 合作流程 ==================== */
.flow-section {
    padding: 6rem 0;
}

.flow-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.flow-step {
    position: relative;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 18px;
    padding: 2.5rem 2rem 2rem;
    transition: all 0.5s var(--ease-out-expo);
}

.flow-step:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.flow-num {
    font-family: var(--font-mono);
    font-size: 2.6rem;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.flow-step h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.flow-step p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

.flow-mail {
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border-bottom: 1px dashed var(--accent-cyan);
}

.flow-mail:hover {
    color: var(--accent-purple);
    border-bottom-color: var(--accent-purple);
}

/* ==================== 联系区 ==================== */
.partner-contact-section {
    padding: 5rem 0 7rem;
}

.partner-contact-box {
    max-width: 880px;
    margin: 0 auto;
    text-align: center;
    background: linear-gradient(160deg, var(--bg-elevated) 0%, var(--bg-surface) 100%);
    border: 1px solid var(--border-subtle);
    border-radius: 24px;
    padding: 4rem 2.5rem;
    position: relative;
    overflow: hidden;
}

.partner-contact-box::before {
    content: '';
    position: absolute;
    top: 0; left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-purple), transparent);
}

.partner-contact-box .contact-title {
    font-family: var(--font-display);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: 0.04em;
}

.partner-contact-box .contact-desc {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 2.5rem;
}

.partner-contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

.partner-contact-item {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: 14px;
    padding: 1.5rem 1rem;
    text-align: center;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.4s ease;
}

a.partner-contact-item:hover {
    border-color: var(--accent-purple);
    background: rgba(217, 70, 239, 0.06);
    transform: translateY(-3px);
}

.partner-contact-item .contact-icon {
    font-size: 1.8rem;
    margin-bottom: 0.4rem;
}

.partner-contact-item .contact-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.18em;
    color: var(--text-muted);
    text-transform: uppercase;
}

.partner-contact-item .contact-value {
    font-size: 1.05rem;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: 0.02em;
    word-break: break-all;
}

a.partner-contact-item .contact-value { color: var(--accent-cyan); }

.btn-cta {
    font-size: 1.05rem;
    padding: 1rem 2.5rem;
}

/* ==================== 默认图片灰度（hover 看清） ==================== */
.partner-section img,
.chain-section img,
.flow-section img,
.partner-contact-section img,
.city-pill,
.partner-icon,
.chain-icon,
.partner-contact-item .contact-icon {
    filter: grayscale(50%);
    transition: filter 0.4s ease;
}

.partner-section img:hover,
.chain-section img:hover,
.flow-section img:hover,
.partner-contact-section img:hover,
.partner-card:hover .partner-icon,
.partner-card:hover .city-pill,
.chain-card:hover .chain-icon,
.partner-contact-item:hover .contact-icon,
.city-pill:hover {
    filter: grayscale(0%);
}

/* ==================== 滚动入场动画 ==================== */
.scroll-animate {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

.hero-animate {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.9s var(--ease-out-expo), transform 0.9s var(--ease-out-expo);
}

.hero-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== 浅色主题适配 ==================== */
[data-theme="light"] .partner-card,
[data-theme="light"] .chain-card,
[data-theme="light"] .flow-step,
[data-theme="light"] .partner-contact-box {
    background: var(--bg-elevated);
}

[data-theme="light"] .partner-contact-box {
    background: linear-gradient(160deg, #ffffff 0%, var(--bg-elevated) 100%);
}

[data-theme="light"] .chain-card-mid {
    background: linear-gradient(160deg, rgba(217, 70, 239, 0.05) 0%, var(--bg-elevated) 70%);
}

[data-theme="light"] .chain-section {
    background: linear-gradient(180deg, transparent 0%, rgba(217, 70, 239, 0.04) 50%, transparent 100%);
}

/* ==================== 响应式 ==================== */
@media (max-width: 980px) {
    .chain-map {
        grid-template-columns: 1fr;
    }

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

    .partner-contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .hero-partner { padding: 6rem 0 3rem; }
    .partner-section .section-container,
    .chain-section .section-container,
    .flow-section .section-container,
    .partner-contact-section .section-container { padding: 0 1rem; }
    .partner-card,
    .flow-step { padding: 2rem 1.25rem 1.5rem; }
    .partner-contact-box { padding: 2.5rem 1.25rem; }
    .partner-contact-box .contact-title { font-size: 1.6rem; }
}