/* ============================================
   2027 Dalian International Climate Summit
   Premium International Redesign
   ============================================ */

/* --- Design Tokens --- */
:root {
    --summit-deep: #0c4a6e;
    --summit-teal: #0f766e;
    --summit-ocean: #0369a1;
    --summit-coral: #e8623a;
    --summit-gold: #b45309;
    --summit-surface: #f8fafc;
    --summit-card-bg: #ffffff;
    --summit-border: #e2e8f0;
    --summit-border-light: #f1f5f9;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 1px 3px rgba(0,0,0,0.04);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.1), 0 2px 8px rgba(0,0,0,0.04);
    --shadow-xl: 0 20px 48px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.04);
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Hero Section --- */
.summit-hero {
    position: relative;
    min-height: 88vh;
    display: flex;
    align-items: center;
    background: linear-gradient(160deg, #0c4a6e 0%, #0e7490 25%, #0f766e 55%, #14532d 100%);
    background-image: url('../images/fjxlll-dalian-2367979.jpg');
    background-size: cover;
    background-position: center 30%;
    background-repeat: no-repeat;
    overflow: hidden;
    padding-bottom: 80px;
}

/* 暗色蒙版，确保白色文字清晰可读 */
.summit-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, rgba(12, 74, 110, 0.82) 0%, rgba(14, 116, 144, 0.65) 30%, rgba(15, 118, 110, 0.6) 60%, rgba(20, 83, 45, 0.72) 100%);
    z-index: 0;
    pointer-events: none;
}

/* 光晕氛围层 */
.summit-hero::after {
    content: '';
    position: absolute;
    top: -30%;
    right: -15%;
    width: 700px;
    height: 700px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
    z-index: 0;
    animation: summitFloat 20s ease-in-out infinite;
    pointer-events: none;
}

@keyframes summitFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.05); }
    66% { transform: translate(-20px, 10px) scale(0.95); }
}

.summit-hero-content {
    position: relative;
    z-index: 1;
    padding: 120px 0 0;
    color: #fff;
}

.summit-hero-content .breadcrumb { margin-bottom: 20px; }
.summit-hero-content .breadcrumb a { color: rgba(255,255,255,0.7); }
.summit-hero-content .breadcrumb .current { color: rgba(255,255,255,0.9); }

.summit-hero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    color: #fff;
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.summit-hero-content h1 {
    font-size: clamp(30px, 5.5vw, 56px);
    font-weight: 800;
    line-height: 1.2;
    color: #fff;
    margin-bottom: 14px;
    letter-spacing: -0.5px;
}

.summit-hero-subtitle {
    font-size: 17px;
    font-weight: 400;
    color: rgba(255,255,255,0.7);
    margin-bottom: 20px;
    letter-spacing: 0.5px;
    line-height: 1.6;
}

.summit-hero-abbr {
    font-weight: 500;
    color: rgba(255,255,255,0.5);
    font-size: 14px;
    letter-spacing: 1px;
}

.summit-hero-desc {
    font-size: 16px;
    color: rgba(255,255,255,0.8);
    max-width: 700px;
    line-height: 1.8;
    margin-bottom: 36px;
}

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

.btn-outline-light {
    display: inline-block;
    padding: 13px 32px;
    border: 1.5px solid rgba(255,255,255,0.5);
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    transition: all 0.3s ease;
    background: transparent;
}
.btn-outline-light:hover { background: rgba(255,255,255,0.15); border-color: #fff; color: #fff; }

/* ============================================
   Section Header — Refined
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-label {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--summit-ocean);
    background: rgba(3, 105, 161, 0.08);
    padding: 6px 16px;
    border-radius: 50px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    color: var(--text, #0f172a);
    letter-spacing: -0.5px;
    margin-bottom: 12px;
}

.section-desc {
    font-size: 16px;
    color: var(--text-muted, #64748b);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ============================================
   1. Overview Grid — Stat Cards
   ============================================ */
/* Gap between hero and first section */
.summit-hero + .section {
    padding-top: 100px;
}
.summit-overview-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.summit-overview-card {
    background: var(--summit-card-bg);
    border: 1px solid var(--summit-border);
    border-radius: var(--radius-xl);
    padding: 36px 24px 32px;
    text-align: center;
    transition: all 0.4s var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.summit-overview-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20%;
    right: 20%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--summit-ocean), transparent);
    border-radius: 3px;
    opacity: 0;
    transition: opacity 0.4s var(--ease-out-expo);
}

.summit-overview-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--summit-ocean);
}
.summit-overview-card:hover::after { opacity: 1; }

.summit-overview-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
}

.summit-overview-card h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--summit-ocean);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.summit-overview-card p {
    font-size: 14px;
    color: var(--text-secondary, #475569);
    line-height: 1.6;
    font-weight: 500;
}

/* ============================================
   2. Themes Section — Bento Layout
   ============================================ */
.summit-themes-section {
    background: linear-gradient(180deg, #f0f9ff 0%, #ecfdf5 100%);
    padding: 80px 0;
}

.summit-themes-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
    margin-top: 40px;
}

/* Card 1 & 2: each 3 cols */
.summit-theme-card:nth-child(1),
.summit-theme-card:nth-child(2) { grid-column: span 3; }

/* Card 3, 4, 5: each 2 cols */
.summit-theme-card:nth-child(3),
.summit-theme-card:nth-child(4),
.summit-theme-card:nth-child(5) { grid-column: span 2; }

.summit-theme-card {
    background: var(--summit-card-bg);
    border-radius: var(--radius-xl);
    padding: 36px 32px;
    transition: all 0.4s var(--ease-out-expo);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.summit-theme-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(3,105,161,0.03) 0%, rgba(15,118,110,0.03) 100%);
    opacity: 0;
    transition: opacity 0.4s var(--ease-out-expo);
}

.summit-theme-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(3,105,161,0.15);
}
.summit-theme-card:hover::before { opacity: 1; }

.summit-theme-number {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 56px;
    font-weight: 800;
    color: rgba(3, 105, 161, 0.05);
    line-height: 1;
    pointer-events: none;
}

.summit-theme-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #eff6ff, #e0f2fe);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.summit-theme-card:nth-child(2) .summit-theme-icon { background: linear-gradient(135deg, #f0fdf4, #dcfce7); }
.summit-theme-card:nth-child(3) .summit-theme-icon { background: linear-gradient(135deg, #fef3c7, #fde68a); }
.summit-theme-card:nth-child(4) .summit-theme-icon { background: linear-gradient(135deg, #f3e8ff, #e9d5ff); }
.summit-theme-card:nth-child(5) .summit-theme-icon { background: linear-gradient(135deg, #fce7f3, #fbcfe8); }

.summit-theme-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text, #0f172a);
    margin: 0;
    position: relative;
}

.summit-theme-card p {
    font-size: 14px;
    color: var(--text-secondary, #475569);
    line-height: 1.75;
    margin: 0;
    position: relative;
}

/* ============================================
   3. Agenda — Central Timeline
   ============================================ */
.summit-agenda-timeline {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-top: 40px;
    max-width: 880px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    padding-left: 48px;
}

/* Central vertical line */
.summit-agenda-timeline::before {
    content: '';
    position: absolute;
    left: 23px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg,
        transparent 0%,
        var(--summit-ocean) 8%,
        var(--summit-teal) 50%,
        var(--summit-ocean) 92%,
        transparent 100%);
    border-radius: 1px;
}

.summit-day-card {
    background: var(--summit-card-bg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--summit-border);
    overflow: hidden;
    transition: all 0.4s var(--ease-out-expo);
    position: relative;
    margin-bottom: 28px;
}

/* Timeline dot */
.summit-day-card::before {
    content: '';
    position: absolute;
    left: -37px;
    top: 36px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--summit-ocean);
    z-index: 2;
    box-shadow: 0 0 0 4px rgba(3, 105, 161, 0.12);
    transition: all 0.3s var(--ease-out-expo);
}

.summit-day-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.summit-day-card:hover::before { border-color: var(--summit-teal); box-shadow: 0 0 0 8px rgba(3, 105, 161, 0.08); }

.summit-day-header {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 28px 32px;
    background: var(--summit-surface);
    border-bottom: 1px solid var(--summit-border-light);
}

.summit-day-badge {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    color: var(--summit-ocean);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 15px;
    letter-spacing: 0.5px;
}

.day-badge-primary { background: linear-gradient(135deg, #eff6ff, #bfdbfe); color: #2563eb; }
.day-badge-accent  { background: linear-gradient(135deg, #fef0ec, #fed7d0); color: var(--summit-coral); }
.day-badge-green   { background: linear-gradient(135deg, #e8f5ee, #bbf7d0); color: #1a7a4c; }
.day-badge-purple  { background: linear-gradient(135deg, #f3e8ff, #e9d5ff); color: #7c3aed; }

.summit-day-info { flex: 1; }

.summit-day-info h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text, #0f172a);
    margin-bottom: 4px;
}

.summit-day-date {
    font-size: 14px;
    color: var(--text-muted, #64748b);
}

.summit-day-body { padding: 8px 0; }

.summit-agenda-item {
    display: flex;
    gap: 20px;
    padding: 20px 32px;
    border-bottom: 1px solid var(--summit-border-light);
    transition: background 0.2s ease;
    align-items: flex-start;
}

.summit-agenda-item:last-child { border-bottom: none; }
.summit-agenda-item:hover { background: var(--summit-surface); }

.summit-agenda-highlight {
    background: linear-gradient(90deg, #eff6ff 0%, transparent 100%);
    border-left: 3px solid var(--summit-ocean);
}

.summit-agenda-time {
    flex-shrink: 0;
    width: 100px;
    box-sizing: border-box;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 700;
    color: var(--summit-ocean);
    text-transform: uppercase;
    letter-spacing: 1px;
    background: rgba(3,105,161,0.06);
    border-radius: 6px;
    text-align: center;
    white-space: nowrap;
}

.summit-agenda-content { flex: 1; }

.summit-agenda-content h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text, #0f172a);
    margin-bottom: 6px;
}

.summit-agenda-content p {
    font-size: 14px;
    color: var(--text-secondary, #475569);
    line-height: 1.6;
}

.summit-agenda-content ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.summit-agenda-content ul li {
    font-size: 14px;
    color: var(--text-secondary, #475569);
    line-height: 1.7;
    padding: 3px 0;
    padding-left: 20px;
    position: relative;
}

.summit-agenda-content ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--summit-ocean);
    opacity: 0.4;
}

/* ============================================
   4. Outputs Section — Premium Cards
   ============================================ */
.summit-outputs-section {
    background: var(--summit-surface);
    padding: 80px 0;
}

.summit-outputs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.summit-output-card {
    background: var(--summit-card-bg);
    border-radius: var(--radius-xl);
    padding: 40px 28px 32px;
    text-align: center;
    border: 1px solid var(--summit-border);
    transition: all 0.4s var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

/* Decorative top ribbon */
.summit-output-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 4px;
    border-radius: 0 0 4px 4px;
    background: var(--summit-ocean);
    opacity: 0;
    transition: all 0.4s var(--ease-out-expo);
}

.summit-output-card:nth-child(2)::before { background: var(--summit-teal); }
.summit-output-card:nth-child(3)::before { background: var(--summit-coral); }

.summit-output-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}
.summit-output-card:hover::before { opacity: 1; width: 72px; }

.summit-output-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.summit-output-card:nth-child(1) .summit-output-icon { background: #eff6ff; }
.summit-output-card:nth-child(2) .summit-output-icon { background: #f0fdf4; }
.summit-output-card:nth-child(3) .summit-output-icon { background: #fef0ec; }

.summit-output-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text, #0f172a);
    margin-bottom: 8px;
    line-height: 1.4;
}

.summit-output-lang {
    display: inline-block;
    background: rgba(3,105,161,0.06);
    color: var(--summit-ocean);
    padding: 5px 16px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 14px;
}

.summit-output-card p {
    font-size: 14px;
    color: var(--text-secondary, #475569);
    line-height: 1.7;
}

/* ============================================
   5. Specials Section — Asymmetric Bento
   ============================================ */
.summit-specials-section {
    padding: 80px 0;
    background: #fff;
}

.summit-specials-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.summit-specials-grid .summit-special-item:nth-child(1) { grid-column: span 2; grid-row: span 1; }
.summit-specials-grid .summit-special-item:nth-child(2) { grid-column: span 2; grid-row: span 1; }
.summit-specials-grid .summit-special-item:nth-child(3) { grid-column: span 4; }
.summit-specials-grid .summit-special-item:nth-child(4) { grid-column: span 2; }
.summit-specials-grid .summit-special-item:nth-child(5) { grid-column: span 2; }

.summit-special-item {
    background: var(--summit-card-bg);
    border-radius: var(--radius-xl);
    padding: 32px;
    border: 1px solid var(--summit-border);
    transition: all 0.4s var(--ease-out-expo);
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: relative;
    overflow: hidden;
}

/* Gradient accent line on left */
.summit-special-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 20%;
    bottom: 20%;
    width: 3px;
    border-radius: 0 3px 3px 0;
    opacity: 0;
    transition: opacity 0.4s var(--ease-out-expo);
}

.summit-special-item:nth-child(1)::before { background: var(--summit-ocean); }
.summit-special-item:nth-child(2)::before { background: var(--summit-teal); }
.summit-special-item:nth-child(3)::before { background: var(--summit-coral); }
.summit-special-item:nth-child(4)::before { background: #2563eb; }
.summit-special-item:nth-child(5)::before { background: #7c3aed; }

.summit-special-item:hover {
    box-shadow: var(--shadow-lg);
    border-color: transparent;
    transform: translateY(-4px);
}
.summit-special-item:hover::before { opacity: 1; }

.summit-special-header {
    display: flex;
    align-items: center;
    gap: 14px;
}

.summit-special-num {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--summit-ocean), var(--summit-teal));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 16px;
    letter-spacing: 0.5px;
}

.summit-special-item:nth-child(2) .summit-special-num { background: linear-gradient(135deg, #0f766e, #0d9488); }
.summit-special-item:nth-child(3) .summit-special-num { background: linear-gradient(135deg, #e8623a, #f97316); }
.summit-special-item:nth-child(4) .summit-special-num { background: linear-gradient(135deg, #2563eb, #3b82f6); }
.summit-special-item:nth-child(5) .summit-special-num { background: linear-gradient(135deg, #7c3aed, #8b5cf6); }

.summit-special-header h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text, #0f172a);
}

.summit-special-item > p {
    font-size: 14px;
    color: var(--text-secondary, #475569);
    line-height: 1.75;
    margin: 0;
    flex: 1;
}

/* ============================================
   6. Audience — Gradient Top Bar Cards
   ============================================ */
.summit-audience-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.summit-audience-card:nth-child(1),
.summit-audience-card:nth-child(2),
.summit-audience-card:nth-child(3) { grid-column: span 2; }

.summit-audience-card:nth-child(4),
.summit-audience-card:nth-child(5) { grid-column: span 3; }

.summit-audience-card {
    background: var(--summit-card-bg);
    border-radius: var(--radius-xl);
    padding: 0;
    border: 1px solid var(--summit-border);
    transition: all 0.4s var(--ease-out-expo);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100%;
}

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

/* Top color bar */
.summit-audience-card::before {
    content: '';
    display: block;
    width: 100%;
    height: 4px;
    flex-shrink: 0;
}

.summit-audience-card:nth-child(1)::before { background: linear-gradient(90deg, #0369a1, #0ea5e9); }
.summit-audience-card:nth-child(2)::before { background: linear-gradient(90deg, #7c3aed, #a78bfa); }
.summit-audience-card:nth-child(3)::before { background: linear-gradient(90deg, #0f766e, #14b8a6); }
.summit-audience-card:nth-child(4)::before { background: linear-gradient(90deg, #16a34a, #4ade80); }
.summit-audience-card:nth-child(5)::before { background: linear-gradient(90deg, #e8623a, #fb923c); }

.summit-audience-card-inner {
    padding: 28px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.summit-audience-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 14px;
}

.summit-audience-card:nth-child(1) .summit-audience-icon { background: #eff6ff; }
.summit-audience-card:nth-child(2) .summit-audience-icon { background: #f3e8ff; }
.summit-audience-card:nth-child(3) .summit-audience-icon { background: #f0fdf4; }
.summit-audience-card:nth-child(4) .summit-audience-icon { background: #f0fdf4; }
.summit-audience-card:nth-child(5) .summit-audience-icon { background: #fef0ec; }

.summit-audience-card h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text, #0f172a);
}

.summit-audience-card-inner > p {
    font-size: 13px;
    color: var(--text-secondary, #475569);
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
}

.summit-audience-rights {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding-top: 14px;
    border-top: 1px solid var(--summit-border-light);
}

.summit-audience-rights span {
    display: inline-block;
    background: var(--summit-surface);
    color: var(--summit-ocean);
    padding: 5px 12px;
    border-radius: 50px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.3px;
    transition: all 0.2s ease;
}
.summit-audience-card:hover .summit-audience-rights span {
    background: #eff6ff;
    color: var(--summit-ocean);
}

/* ============================================
   7. Value Section — Bento 5 Cards
   ============================================ */
.summit-value-section {
    background: linear-gradient(180deg, #eff6ff 0%, #f0fdf4 100%);
    padding: 80px 0;
}

.summit-value-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.summit-value-card:nth-child(1),
.summit-value-card:nth-child(2),
.summit-value-card:nth-child(3) { grid-column: span 2; }

.summit-value-card:nth-child(4),
.summit-value-card:nth-child(5) { grid-column: span 3; }

.summit-value-card {
    background: var(--summit-card-bg);
    border-radius: var(--radius-xl);
    padding: 32px 28px;
    border: 1px solid var(--summit-border);
    transition: all 0.4s var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

/* Subtle corner glow */
.summit-value-card::after {
    content: '';
    position: absolute;
    top: -40px;
    right: -40px;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(3,105,161,0.06) 0%, transparent 70%);
    transition: all 0.4s var(--ease-out-expo);
}

.summit-value-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.summit-value-card:hover::after { width: 120px; height: 120px; top: -60px; right: -60px; }

.summit-value-card h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text, #0f172a);
    position: relative;
}

.summit-value-card p {
    font-size: 14px;
    color: var(--text-secondary, #475569);
    line-height: 1.75;
    position: relative;
}

/* ============================================
   8. Organizers — International Design Language
   ============================================ */
.summit-organizers-section {
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.summit-organizers-section .section-header {
    margin-bottom: 56px;
}

.summit-organizers-section .section-label {
    background: rgba(12, 74, 110, 0.08);
    color: var(--summit-ocean);
    padding: 8px 18px;
    font-size: 11px;
    letter-spacing: 2px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.summit-organizers-section .section-label .label-en {
    font-weight: 500;
    opacity: 0.75;
}

.summit-organizers-section .section-subtitle {
    font-size: 15px;
    color: var(--text-muted, #94a3b8);
    font-weight: 500;
    margin-top: 10px;
    letter-spacing: 0.5px;
}

.summit-organizers {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.summit-organizer-card {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 32px 36px;
    border: 1px solid var(--summit-border);
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
    transition: all 0.35s var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.summit-organizer-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(12, 74, 110, 0.1);
}

.summit-organizer-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--summit-ocean);
    transition: width 0.35s var(--ease-out-expo);
}

.summit-organizer-card:hover::before { width: 6px; }

.summit-organizer-card-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
}

.summit-organizer-label {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--summit-ocean);
    background: rgba(12, 74, 110, 0.08);
    padding: 8px 16px;
    border-radius: 50px;
}

.summit-organizer-label .label-en {
    font-weight: 500;
    opacity: 0.65;
    font-size: 10px;
}

.summit-organizer-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--text, #0f172a);
    letter-spacing: -0.3px;
    line-height: 1.4;
    margin: 0;
}

.summit-organizer-name-en {
    font-size: 15px;
    color: var(--text-muted, #64748b);
    font-weight: 500;
    margin-top: 8px;
    letter-spacing: 0.2px;
}

.summit-organizer-host { text-align: center; }
.summit-organizer-host .summit-organizer-card-header { justify-content: center; }
.summit-organizer-host::before { background: var(--summit-ocean); }
.summit-organizer-host .summit-organizer-name { color: var(--summit-ocean); }

.summit-organizer-guide {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.summit-organizer-guide .summit-organizer-card-header { margin-bottom: 0; }

.summit-organizer-guide-body {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 28px;
    padding-left: 4px;
}

.summit-organizer-guide-item {
    flex: 1;
    min-width: 240px;
}

.summit-organizer-guide-item .summit-organizer-name {
    font-size: 18px;
    font-weight: 600;
}

.summit-organizer-guide-item .summit-organizer-name-en {
    font-size: 13px;
    margin-top: 4px;
}

.summit-organizer-guide-divider {
    color: var(--text-muted, #cbd5e1);
    font-size: 20px;
    font-weight: 300;
    align-self: center;
}

.summit-organizer-co-block {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 32px 36px;
    border: 1px solid var(--summit-border);
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
    text-align: center;
}

.summit-organizer-block-header {
    margin-bottom: 24px;
}

.summit-organizer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.summit-organizer-grid-item {
    background: #f8fafc;
    border: 1px solid var(--summit-border);
    border-radius: var(--radius-lg);
    padding: 24px 18px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    transition: all 0.3s var(--ease-out-expo);
}

.summit-organizer-grid-item:hover {
    background: #fff;
    border-color: var(--summit-ocean);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(12, 74, 110, 0.08);
}

.summit-organizer-grid-item .item-icon {
    font-size: 24px;
    line-height: 1;
    margin-bottom: 4px;
}

.summit-organizer-grid-item .item-zh {
    font-size: 15px;
    font-weight: 600;
    color: var(--text, #0f172a);
}

.summit-organizer-grid-item .item-en {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted, #94a3b8);
    letter-spacing: 0.3px;
    text-transform: capitalize;
}

@media (max-width: 992px) {
    .summit-organizer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .summit-organizer-card,
    .summit-organizer-co-block { padding: 24px 22px; }

    .summit-organizer-card-header { flex-wrap: wrap; justify-content: center; }

    .summit-organizer-name { font-size: 18px; }
    .summit-organizer-name-en { font-size: 13px; }

    .summit-organizer-guide-body { flex-direction: column; align-items: flex-start; gap: 16px; }
    .summit-organizer-guide-divider { display: none; }
    .summit-organizer-guide-item { width: 100%; }

    .summit-organizer-grid { grid-template-columns: 1fr; }
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1024px) {
    .summit-overview-grid { grid-template-columns: repeat(2, 1fr); }

    .summit-themes-grid { grid-template-columns: repeat(2, 1fr); }
    .summit-theme-card:nth-child(1),
    .summit-theme-card:nth-child(2) { grid-column: span 2; }
    .summit-theme-card:nth-child(3),
    .summit-theme-card:nth-child(4),
    .summit-theme-card:nth-child(5) { grid-column: span 1; }

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

    .summit-specials-grid { grid-template-columns: repeat(2, 1fr); }
    .summit-specials-grid .summit-special-item:nth-child(1),
    .summit-specials-grid .summit-special-item:nth-child(2) { grid-column: span 1; }
    .summit-specials-grid .summit-special-item:nth-child(3) { grid-column: span 2; }
    .summit-specials-grid .summit-special-item:nth-child(4),
    .summit-specials-grid .summit-special-item:nth-child(5) { grid-column: span 1; }

    .summit-audience-grid { grid-template-columns: repeat(2, 1fr); }
    .summit-audience-card:nth-child(1),
    .summit-audience-card:nth-child(2),
    .summit-audience-card:nth-child(3),
    .summit-audience-card:nth-child(4),
    .summit-audience-card:nth-child(5) { grid-column: span 1; }
    .summit-audience-grid .summit-audience-card:last-child { grid-column: 1 / -1; }

    .summit-value-grid { grid-template-columns: repeat(2, 1fr); }
    .summit-value-card:nth-child(1),
    .summit-value-card:nth-child(2),
    .summit-value-card:nth-child(3),
    .summit-value-card:nth-child(4) { grid-column: span 1; }
    .summit-value-card:nth-child(5) { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
    /* ---- Hero ---- */
    .summit-hero { min-height: auto; padding-top: 84px; padding-bottom: 100px; }
    .summit-hero > .container { padding: 0 32px; }
    .summit-hero-content { padding: 60px 0 0; }
    .summit-hero-content h1 { font-size: 26px; line-height: 1.3; }
    .summit-hero-subtitle { font-size: 14px; line-height: 1.5; margin-bottom: 16px; }
    .summit-hero-desc { font-size: 14px; line-height: 1.65; margin-bottom: 28px; }
    .summit-hero-badge { font-size: 12px; padding: 7px 14px; margin-bottom: 18px; }
    .summit-hero-actions { flex-direction: row; gap: 12px; }
    .summit-hero-actions .btn { text-align: center; font-size: 14px; padding: 10px 22px; }
    .summit-hero-content .breadcrumb { font-size: 13px; margin-bottom: 14px; }

    /* ---- Sections ---- */
    .summit-hero + .section { padding-top: 60px; }
    .summit-themes-section,
    .summit-outputs-section,
    .summit-specials-section,
    .summit-value-section,
    .summit-organizers-section { padding: 56px 0; }
    .section-header { margin-bottom: 36px; }
    .section-title { font-size: 26px; }
    .section-desc { font-size: 14px; }

    /* ---- Overview ---- */
    .summit-overview-grid { grid-template-columns: 1fr; gap: 12px; }
    .summit-overview-card { padding: 24px 20px; }

    /* ---- Themes ---- */
    .summit-themes-grid { grid-template-columns: 1fr; gap: 12px; }
    .summit-theme-card:nth-child(1),
    .summit-theme-card:nth-child(2),
    .summit-theme-card:nth-child(3),
    .summit-theme-card:nth-child(4),
    .summit-theme-card:nth-child(5) { grid-column: auto; }
    .summit-theme-card { padding: 24px 22px; }
    .summit-theme-number { font-size: 42px; top: 10px; right: 14px; }

    /* ---- Outputs ---- */
    .summit-outputs-grid { grid-template-columns: 1fr; gap: 12px; }
    .summit-output-card { padding: 28px 22px; }

    /* ---- Specials ---- */
    .summit-specials-grid { grid-template-columns: 1fr; gap: 12px; }
    .summit-specials-grid .summit-special-item:nth-child(1),
    .summit-specials-grid .summit-special-item:nth-child(2),
    .summit-specials-grid .summit-special-item:nth-child(3),
    .summit-specials-grid .summit-special-item:nth-child(4),
    .summit-specials-grid .summit-special-item:nth-child(5) { grid-column: auto; }
    .summit-special-item { padding: 24px 22px; }

    /* ---- Audience ---- */
    .summit-audience-grid { grid-template-columns: 1fr; gap: 12px; }
    .summit-audience-card:nth-child(1),
    .summit-audience-card:nth-child(2),
    .summit-audience-card:nth-child(3),
    .summit-audience-card:nth-child(4),
    .summit-audience-card:nth-child(5) { grid-column: auto; }
    .summit-audience-card-inner { padding: 22px 20px; }

    /* ---- Value ---- */
    .summit-value-grid { grid-template-columns: 1fr; gap: 12px; }
    .summit-value-card:nth-child(1),
    .summit-value-card:nth-child(2),
    .summit-value-card:nth-child(3),
    .summit-value-card:nth-child(4),
    .summit-value-card:nth-child(5) { grid-column: auto; }
    .summit-value-card { padding: 24px 22px; }

    /* ---- Agenda ---- */
    .summit-agenda-timeline { padding-left: 32px; }
    .summit-agenda-timeline::before { left: 15px; }
    .summit-day-card { margin-bottom: 20px; }
    .summit-day-card::before { left: -25px; width: 10px; height: 10px; top: 28px; }
    .summit-day-card:hover { transform: none; }
    .summit-day-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 22px 24px;
    }
    .summit-day-badge { width: 52px; height: 52px; font-size: 13px; }
    .summit-day-info h3 { font-size: 17px; }
    .summit-agenda-item {
        flex-direction: column;
        gap: 6px;
        padding: 14px 24px;
    }
    .summit-agenda-time { width: auto; display: inline-block; }
    .summit-agenda-content h4 { font-size: 15px; }
    .summit-agenda-content p,
    .summit-agenda-content ul li { font-size: 13px; }
}

@media (max-width: 480px) {
    .summit-hero { min-height: auto; padding-top: 76px; padding-bottom: 80px; }
    .summit-hero > .container { padding: 0 26px; }
    .summit-hero-content { padding: 52px 0 0; }
    .summit-hero-content h1 { font-size: 23px; }
    .summit-hero-subtitle { font-size: 13px; }
    .summit-hero-desc { font-size: 13px; }
    .summit-hero-badge { font-size: 11px; padding: 6px 12px; }
    .summit-hero-actions .btn { padding: 10px 20px; font-size: 13px; }
    .summit-hero-content .breadcrumb { font-size: 12px; }

    .summit-hero + .section { padding-top: 48px; }
    .summit-themes-section,
    .summit-outputs-section,
    .summit-specials-section,
    .summit-value-section,
    .summit-organizers-section { padding: 44px 0; }
    .section-header { margin-bottom: 28px; }
    .section-title { font-size: 24px; }
    .section-desc { font-size: 13px; }

    .summit-overview-card { padding: 20px 16px; }
    .summit-theme-card { padding: 20px 18px; }
    .summit-output-card { padding: 24px 18px; }
    .summit-special-item { padding: 20px 18px; }
    .summit-audience-card-inner { padding: 18px 16px; }
    .summit-value-card { padding: 20px 18px; }

    .summit-agenda-timeline { padding-left: 24px; }
    .summit-agenda-timeline::before { left: 11px; }
    .summit-day-card::before { left: -19px; width: 8px; height: 8px; top: 24px; }
    .summit-day-header { padding: 18px 20px; }
    .summit-agenda-item { padding: 12px 20px; }
    .summit-agenda-content h4 { font-size: 14px; }
}