/* ═══════════════════════════════════════════
   Aerlix — MD3 × Fluent Design System
   暗色优先 · 层次感 · 高饱和点缀 · 自适应
   ═══════════════════════════════════════════ */

/* ── MD3 Dark Theme Tokens ── */
:root {
    /* Surface elevation (MD3 tonal palette) */
    --surface-0: #0b0b0f;
    --surface-1: #12121a;
    --surface-2: #181824;
    --surface-3: #1e1e2e;
    --surface-4: #242438;
    --surface-5: #2a2a40;

    /* Primary — high saturation, pops on dark */
    --primary: #a78bfa;
    --primary-container: #2d2050;
    --on-primary: #0b0b0f;
    --on-primary-container: #e9ddff;

    /* Secondary */
    --secondary: #c4b5fd;
    --secondary-container: #332850;

    /* Tertiary accent */
    --tertiary: #67e8f9;
    --tertiary-container: #16404a;

    /* Error */
    --error: #fca5a5;
    --error-container: #4a2020;

    /* On-surface text */
    --on-surface: #e6e1ec;
    --on-surface-variant: #c9c4d4;
    --on-surface-muted: #948ca0;
    --outline: #49445a;
    --outline-variant: #2e2a3a;

    /* Shadows (elevation-based) */
    --elevation-1: 0 1px 2px rgba(0,0,0,0.3), 0 1px 3px rgba(0,0,0,0.15);
    --elevation-2: 0 2px 4px rgba(0,0,0,0.3), 0 3px 6px rgba(0,0,0,0.2);
    --elevation-3: 0 4px 8px rgba(0,0,0,0.3), 0 6px 12px rgba(0,0,0,0.2);
    --elevation-4: 0 8px 16px rgba(0,0,0,0.35), 0 10px 24px rgba(0,0,0,0.25);
    --elevation-5: 0 12px 24px rgba(0,0,0,0.4), 0 16px 36px rgba(0,0,0,0.3);

    /* Glass / Acrylic (for nav only) */
    --acrylic-bg: rgba(24, 24, 36, 0.75);
    --acrylic-border: rgba(255, 255, 255, 0.06);
    --acrylic-blur: blur(24px) saturate(180%);

    /* Layout */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;

    /* Legacy compat */
    --bg: var(--surface-0);
    --bg-alt: var(--surface-1);
    --text: var(--on-surface);
    --text-secondary: var(--on-surface-variant);
    --text-muted: var(--on-surface-muted);
    --nav-bg: var(--acrylic-bg);
    --nav-text: var(--on-surface);
    --nav-border: var(--acrylic-border);
    --card-bg: var(--surface-3);
    --card-border: var(--outline-variant);
    --card-shadow: var(--elevation-2);
    --section-alt-bg: var(--surface-1);
    --accent: var(--primary);
    --accent-hover: #c4b5fd;
    --accent-transparent: rgba(167, 139, 250, 0.12);
    --hero-bg: var(--surface-0);
    --hero-text: var(--on-surface);
}

/* ── Light theme ── */
[data-theme="light"] {
    --surface-0: #faf9fd;
    --surface-1: #f3f0f9;
    --surface-2: #e9e4f2;
    --surface-3: #e0daea;
    --surface-4: #d6cee2;
    --surface-5: #ccc2d8;

    --primary: #6750a4;
    --primary-container: #e9ddff;
    --on-primary: #ffffff;
    --on-primary-container: #21005d;

    --secondary: #625b71;
    --secondary-container: #e8def8;

    --tertiary: #0c8599;
    --tertiary-container: #c5f6fa;

    --error: #ba1a1a;
    --error-container: #ffdad6;

    --on-surface: #1c1b1f;
    --on-surface-variant: #49454f;
    --on-surface-muted: #7a757f;
    --outline: #79747e;
    --outline-variant: #cac4d0;

    --elevation-1: 0 1px 2px rgba(0,0,0,0.05), 0 1px 3px rgba(0,0,0,0.04);
    --elevation-2: 0 2px 4px rgba(0,0,0,0.06), 0 3px 6px rgba(0,0,0,0.04);
    --elevation-3: 0 4px 8px rgba(0,0,0,0.08), 0 6px 12px rgba(0,0,0,0.05);
    --elevation-4: 0 8px 16px rgba(0,0,0,0.1), 0 10px 24px rgba(0,0,0,0.06);
    --elevation-5: 0 12px 24px rgba(0,0,0,0.12), 0 16px 36px rgba(0,0,0,0.08);

    --acrylic-bg: rgba(250, 249, 253, 0.75);
    --acrylic-border: rgba(0, 0, 0, 0.06);

    --bg: var(--surface-0);
    --bg-alt: var(--surface-1);
    --text: var(--on-surface);
    --text-secondary: var(--on-surface-variant);
    --text-muted: var(--on-surface-muted);
    --nav-bg: var(--acrylic-bg);
    --nav-text: var(--on-surface);
    --nav-border: var(--acrylic-border);
    --card-bg: var(--surface-2);
    --card-border: var(--outline-variant);
    --card-shadow: var(--elevation-1);
    --section-alt-bg: var(--surface-1);
    --accent: var(--primary);
    --accent-hover: #4f3b8c;
    --accent-transparent: rgba(103, 80, 164, 0.1);
    --hero-bg: var(--surface-0);
    --hero-text: var(--on-surface);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
    background: var(--surface-0);
}

body {
    font-family: "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--on-surface);
    background: var(--surface-0);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

/* Phosphor Icons */
.ph { vertical-align: -0.125em; flex-shrink: 0; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }

/* ── Navigation ── */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 3.5rem;
    padding: 0 1.5rem;
    background: var(--acrylic-bg);
    backdrop-filter: var(--acrylic-blur);
    -webkit-backdrop-filter: var(--acrylic-blur);
    border-bottom: 1px solid var(--acrylic-border);
}

.nav-left { display: flex; align-items: center; }
.logo-img { height: 1.75rem; width: auto; }

.nav-center { display: flex; align-items: center; gap: 0.125rem; }

.nav-center a {
    position: relative;
    padding: 0.45rem 1rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--on-surface-variant);
    border-radius: var(--radius-lg);
    transition: all 0.2s ease;
}

.nav-center a:hover { color: var(--on-surface); background: var(--surface-4); }

.nav-center a.active {
    color: var(--on-primary-container);
    background: var(--primary-container);
    font-weight: 600;
}

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

.theme-btn {
    width: 2.5rem; height: 2.5rem;
    border: none; border-radius: 50%;
    font-size: 1.125rem;
    background: transparent;
    color: var(--on-surface-variant);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.2s ease;
}

.theme-btn:hover { background: var(--surface-4); color: var(--on-surface); }

/* ── Hero ── */
.hero {
    position: relative;
    padding: 8rem 2rem 6rem;
    text-align: center;
    background: var(--surface-0);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -20%; left: 50%;
    transform: translateX(-50%);
    width: 50rem; height: 50rem;
    background: radial-gradient(circle, rgba(167, 139, 250, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

.hero-noise {
    position: absolute; inset: 0;
    opacity: 0.025;
    background-image:
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Cg fill='%23ffffff' fill-opacity='0.5'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E"),
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(255,255,255,0.01) 2px, rgba(255,255,255,0.01) 4px);
    pointer-events: none; z-index: 0;
}

.animated-bg, .gradient-orbs, .orb-1, .orb-2, .orb-3, .orb-4 { display: none; }

.hero-content { position: relative; max-width: 50rem; margin: 0 auto; }

.hero-badge {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.35rem 1.1rem;
    font-size: 0.75rem; font-weight: 500;
    color: var(--primary);
    background: var(--primary-container);
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--on-surface);
    margin-bottom: 0.5rem;
    line-height: 1.15;
}

.hero h1 span {
    background: linear-gradient(135deg, var(--primary) 0%, var(--tertiary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.typing-container { margin-bottom: 1.75rem; min-height: 5rem; }

.typing-line {
    font-size: 1.35rem; font-weight: 400;
    color: var(--on-surface-variant);
    display: inline-flex; align-items: center;
    min-height: 2rem;
}

.typing-cursor {
    display: inline-block; width: 2px; height: 1.15em;
    background: var(--primary); margin-left: 4px;
    vertical-align: text-bottom;
    animation: cursorBlink 0.8s ease-in-out infinite;
    border-radius: 1px;
}

@keyframes cursorBlink { 0%,100%{opacity:1} 50%{opacity:0} }

.hero-buttons {
    display: flex; gap: 0.75rem; flex-wrap: wrap; justify-content: center;
}

/* ── Buttons ── */
.btn-primary {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.75rem 2rem;
    font-size: 0.875rem; font-weight: 600;
    color: var(--on-primary);
    background: var(--primary);
    border: none; border-radius: var(--radius-lg);
    cursor: pointer; text-decoration: none;
    transition: all 0.2s ease;
    box-shadow: var(--elevation-1);
    position: relative; overflow: hidden;
}

.btn-primary::after {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at center, rgba(255,255,255,0.2) 0%, transparent 70%);
    opacity: 0; transition: opacity 0.3s;
}

.btn-primary:hover { box-shadow: var(--elevation-3); transform: translateY(-1px); }
.btn-primary:hover::after { opacity: 1; }

.btn-secondary {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.75rem 2rem;
    font-size: 0.875rem; font-weight: 500;
    color: var(--primary);
    background: transparent;
    border: 1px solid var(--outline);
    border-radius: var(--radius-lg);
    cursor: pointer; text-decoration: none;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background: var(--primary-container);
    border-color: var(--primary);
    transform: translateY(-1px);
}

/* ── Sections ── */
.section { position: relative; padding: 5rem 2rem; max-width: 64rem; margin: 0 auto; }
.section-alt { background: var(--surface-1); max-width: none; }

.section-header { text-align: center; margin-bottom: 3rem; }

.section-header h2 {
    font-size: 2rem; font-weight: 600;
    letter-spacing: -0.02em; color: var(--on-surface);
    margin-bottom: 0.5rem;
}

.section-header p {
    font-size: 0.95rem; color: var(--on-surface-variant);
    max-width: 32rem; margin: 0 auto;
}

/* ── Feature Cards ── */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem; margin: 0 auto;
}

.feature-card {
    background: var(--surface-3);
    padding: 2.5rem 2rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--outline-variant);
    box-shadow: var(--elevation-1);
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
    text-align: center; cursor: pointer;
}

.feature-card:hover {
    background: var(--surface-4);
    transform: translateY(-2px);
    box-shadow: var(--elevation-3);
    border-color: var(--outline);
}

.feature-icon {
    width: 4rem; height: 4rem;
    margin: 0 auto 1.25rem;
    background: var(--primary-container);
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.75rem; color: var(--on-primary-container);
}

.feature-card h3 { font-size: 1.15rem; font-weight: 600; color: var(--on-surface); margin-bottom: 0.5rem; }
.feature-card p { font-size: 0.875rem; color: var(--on-surface-variant); line-height: 1.7; }

/* ── Stats ── */
.stats-section { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

.stat-item {
    text-align: center; padding: 2.5rem 1rem;
    background: var(--surface-2);
    border-radius: var(--radius-xl);
    border: 1px solid var(--outline-variant);
    box-shadow: var(--elevation-1);
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
    cursor: pointer;
}

.stat-item:hover {
    background: var(--surface-3);
    transform: translateY(-2px);
    box-shadow: var(--elevation-3);
    border-color: var(--outline);
}

.stat-number {
    font-size: 3rem; font-weight: 700;
    font-variant-numeric: tabular-nums;
    background: linear-gradient(135deg, var(--primary) 0%, var(--tertiary) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem; line-height: 1;
}

.stat-label { font-size: 0.875rem; color: var(--on-surface-variant); font-weight: 500; }

/* ── Highlight ── */
.highlight-section {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 3rem; align-items: center;
    max-width: 64rem; margin: 0 auto; padding: 0 2rem;
}

.highlight-content h2 {
    font-size: 2rem; font-weight: 600;
    color: var(--on-surface); margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.highlight-content p {
    font-size: 0.95rem; color: var(--on-surface-variant);
    line-height: 1.8; margin-bottom: 1.5rem;
}

.highlight-visual {
    background: linear-gradient(135deg, var(--primary-container) 0%, var(--tertiary-container) 100%);
    border-radius: var(--radius-2xl);
    padding: 3rem 2rem;
    display: flex; align-items: center; justify-content: center;
    min-height: 16rem;
    position: relative; overflow: hidden;
    border: 1px solid var(--outline-variant);
    box-shadow: 0 0 30px rgba(167, 139, 250, 0.15);
}

.highlight-visual::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at 70% 30%, rgba(255,255,255,0.05) 0%, transparent 60%);
    pointer-events: none;
}

.highlight-visual-content { color: var(--on-primary-container); text-align: center; position: relative; z-index: 1; }
.highlight-visual-content .big-icon { font-size: 3.5rem; margin-bottom: 1rem; display: block; animation: float-icon 4s ease-in-out infinite; }

@keyframes float-icon { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }

.highlight-visual-content h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.5rem; }
.highlight-visual-content p { opacity: 0.8; font-size: 0.95rem; }

/* ── CTA ── */
.cta-section {
    position: relative;
    background: var(--surface-1);
    padding: 5rem 2rem; text-align: center;
    border-top: 1px solid var(--outline-variant);
    border-bottom: 1px solid var(--outline-variant);
}

.cta-section h2 { font-size: 2rem; font-weight: 600; color: var(--on-surface); margin-bottom: 0.5rem; }
.cta-section p { font-size: 0.95rem; color: var(--on-surface-variant); margin-bottom: 2rem; max-width: 32rem; margin-left: auto; margin-right: auto; }

/* ── Small Hero ── */
.small-hero {
    position: relative; padding: 6rem 2rem 3rem;
    text-align: center; background: var(--surface-0); overflow: hidden;
}

.small-hero::before {
    content: ''; position: absolute; top: 0; left: 50%;
    transform: translateX(-50%);
    width: 30rem; height: 30rem;
    background: radial-gradient(circle, rgba(167, 139, 250, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

.small-hero .animated-bg { display: none; }
.small-hero h1 { font-size: 2.25rem; font-weight: 600; color: var(--on-surface); margin-bottom: 0.5rem; position: relative; }
.small-hero p { position: relative; font-size: 0.95rem; color: var(--on-surface-variant); }
.small-hero p a { color: var(--primary); }

/* ── Page Content ── */
.page-content { position: relative; padding: 3rem 2rem 5rem; max-width: 64rem; margin: 0 auto; }

.content-card {
    background: var(--surface-2);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-xl);
    box-shadow: var(--elevation-1);
    padding: 2.5rem; margin-bottom: 1.5rem;
}

.content-card h2 {
    font-size: 1.375rem; font-weight: 600;
    color: var(--on-surface); margin-bottom: 1.25rem;
    padding-bottom: 0.75rem; border-bottom: 1px solid var(--outline-variant);
}

.content-card .card-divider { border: none; border-top: 1px solid var(--outline-variant); margin: 2rem 0; }

.content-card .card-section-label {
    font-size: 0.75rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.06em; color: var(--on-surface-muted); margin-bottom: 1rem;
}

.content-card p { font-size: 0.9rem; line-height: 1.8; color: var(--on-surface-variant); margin-bottom: 0.75rem; }
.content-card ul { padding-left: 1.5rem; line-height: 2; font-size: 0.9rem; color: var(--on-surface-variant); }
.content-card ul li { margin-bottom: 0.25rem; }

/* ── Team Cards ── */
.team-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); gap: 1.5rem; }

.team-member-card {
    background: var(--surface-2);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--elevation-1);
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
    cursor: pointer; position: relative; overflow: hidden;
}

.team-member-card:hover {
    background: var(--surface-3);
    box-shadow: var(--elevation-3);
    border-color: var(--outline);
    transform: translateY(-2px);
}

.card-header { display: flex; align-items: flex-start; gap: 1.25rem; margin-bottom: 1rem; }
.avatar-wrapper { flex-shrink: 0; }

.member-avatar {
    width: 5rem; height: 5rem; border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--outline-variant);
    background: var(--surface-4);
    box-shadow: var(--elevation-1);
}

.team-member-card.lovely .member-avatar { border-color: rgba(59, 130, 246, 0.4); }
.team-member-card.eandan .member-avatar { border-color: rgba(139, 92, 246, 0.4); }

.member-info { flex: 1; min-width: 0; }

.member-name { font-size: 1.25rem; font-weight: 600; color: var(--on-surface); margin-bottom: 0.15rem; }

.member-nickname {
    font-size: 0.8rem; color: var(--on-surface-variant);
    margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.5rem;
}

.nickname-badge { font-size: 0.7rem; padding: 0.2rem 0.6rem; border-radius: var(--radius-sm); font-weight: 500; }
.team-member-card.lovely .nickname-badge { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.team-member-card.eandan .nickname-badge { background: rgba(139, 92, 246, 0.15); color: #a78bfa; }

.member-role { font-size: 0.875rem; color: var(--on-surface-variant); line-height: 1.5; }

.member-contact {
    display: flex; align-items: center; gap: 0.5rem;
    font-size: 0.8rem; color: var(--on-surface-variant); margin-top: 0.5rem;
}

.member-contact a { color: var(--primary); }
.member-contact a:hover { text-decoration: underline; }

.card-details {
    max-height: 0; overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0.2, 0, 0, 1), opacity 0.3s ease, padding 0.3s ease;
    opacity: 0; padding-top: 0; border-top: 1px solid transparent;
}

.card-details.expanded { max-height: 62.5rem; opacity: 1; padding-top: 1.25rem; border-top-color: var(--outline-variant); }

.section-label { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--on-surface-muted); margin-bottom: 0.5rem; }
.bio-text { font-size: 0.85rem; color: var(--on-surface-variant); line-height: 1.8; margin-bottom: 1.25rem; }
.bio-section { margin-bottom: 1.25rem; }

.expertise-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.5rem; margin-bottom: 1.25rem; }

.expertise-item {
    display: flex; align-items: center; gap: 0.5rem;
    padding: 0.75rem 0.875rem; background: var(--surface-3);
    border-radius: var(--radius-md); border: 1px solid var(--outline-variant);
    font-size: 0.825rem; transition: all 0.2s;
}

.expertise-item:hover { border-color: var(--outline); background: var(--surface-4); }
.expertise-icon { width: 1.75rem; height: 1.75rem; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 0.9rem; background: var(--accent-transparent); }
.expertise-text { font-weight: 500; color: var(--on-surface); }

.skills-container { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.skill-tag {
    font-size: 0.75rem; padding: 0.3rem 0.75rem;
    border-radius: var(--radius-sm); border: 1px solid var(--outline-variant);
    background: var(--surface-3); color: var(--on-surface-variant);
    transition: all 0.2s;
}

.skill-tag:hover { border-color: var(--primary); color: var(--primary); }

.skill-tag.primary {
    background: var(--primary-container); border-color: transparent;
    color: var(--on-primary-container); font-weight: 500;
}

.expand-hint {
    position: absolute; bottom: 0.75rem; right: 1rem;
    font-size: 0.7rem; color: var(--on-surface-muted);
    display: flex; align-items: center; gap: 0.25rem;
}

.expand-hint svg { transition: transform 0.3s ease; }
.team-member-card.expanded .expand-hint svg { transform: rotate(180deg); }
.decoration-dot { display: none; }

/* ── Contact Grid ── */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }

.contact-info-card {
    background: var(--surface-2);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-xl);
    padding: 2.5rem 2rem; text-align: center;
    box-shadow: var(--elevation-1);
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
}

.contact-info-card:hover { background: var(--surface-3); box-shadow: var(--elevation-2); border-color: var(--outline); transform: translateY(-2px); }

.contact-icon {
    width: 3.5rem; height: 3.5rem; margin: 0 auto 1.25rem;
    background: var(--primary-container); border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; color: var(--on-primary-container);
}

.contact-info-card h3 { font-size: 1.15rem; font-weight: 600; color: var(--on-surface); margin-bottom: 0.5rem; }
.contact-info-card p { font-size: 0.85rem; color: var(--on-surface-variant); margin-bottom: 1rem; line-height: 1.6; }
.contact-link { color: var(--primary); font-weight: 600; font-size: 0.9rem; transition: color 0.2s; }
.contact-link:hover { text-decoration: underline; }

.social-links { display: flex; justify-content: center; gap: 0.75rem; margin-top: 1.25rem; }

.social-link {
    width: 2.75rem; height: 2.75rem;
    background: var(--surface-3); border: 1px solid var(--outline-variant);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.2s ease;
}

.social-link:hover { background: var(--primary-container); border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--elevation-2); }
.social-link img { width: 1.125rem; height: 1.125rem; opacity: 0.8; transition: opacity 0.2s; }
.social-link:hover img { opacity: 1; }

.qr-display {
    width: 8rem; height: 8rem; background: #ffffff;
    border-radius: var(--radius-md); margin: 1rem auto 0;
    display: flex; align-items: center; justify-content: center;
    border: 1px solid var(--outline-variant); overflow: hidden;
    box-shadow: var(--elevation-1);
}

.qr-display img { width: 100%; height: 100%; object-fit: cover; }

/* ── Form ── */
form input:focus, form textarea:focus { outline: none; border-color: var(--primary) !important; box-shadow: 0 0 0 3px var(--accent-transparent) !important; }

/* ── Footer ── */
.footer { background: var(--surface-1); border-top: 1px solid var(--outline-variant); padding: 4rem 2rem 1.5rem; }

.footer-content {
    max-width: 64rem; margin: 0 auto;
    display: grid; grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem; padding-bottom: 2rem;
    border-bottom: 1px solid var(--outline-variant);
}

.footer-brand h3 { font-size: 1.2rem; font-weight: 700; color: var(--on-surface); margin-bottom: 0.5rem; }
.footer-brand p { font-size: 0.825rem; color: var(--on-surface-variant); line-height: 1.7; }
.footer-links h4 { font-size: 0.8rem; font-weight: 700; color: var(--on-surface); margin-bottom: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; }
.footer-links ul { list-style: none; padding: 0; }
.footer-links li { margin-bottom: 0.4rem; }
.footer-links a { font-size: 0.825rem; color: var(--on-surface-variant); transition: color 0.2s; }
.footer-links a:hover { color: var(--primary); }
.footer-bottom { max-width: 64rem; margin: 1.5rem auto 0; text-align: center; font-size: 0.75rem; color: var(--on-surface-muted); }

/* ── Responsive ── */
@media (max-width: 960px) {
    .navbar { padding: 0 1rem; flex-wrap: wrap; height: auto; min-height: 3.5rem; }

    .nav-center {
        order: 3; width: 100%; justify-content: center;
        padding: 0.5rem 0 0.75rem;
        border-top: 1px solid var(--outline-variant);
        margin-top: 0.5rem; gap: 0;
    }
    .nav-center a { padding: 0.35rem 0.75rem; font-size: 0.75rem; }

    .hero { padding: 7rem 1.5rem 4rem; }
    .hero h1 { font-size: 2.5rem; }
    .typing-line { font-size: 1.15rem; }
    .section, .page-content { padding: 3rem 1.5rem; }
    .section-header h2 { font-size: 1.75rem; }

    .highlight-section { grid-template-columns: 1fr; gap: 2rem; }
    .highlight-visual { order: -1; min-height: 12rem; }
    .stats-section { grid-template-columns: repeat(2, 1fr); }
    .footer-content { grid-template-columns: 1fr; gap: 2rem; text-align: center; }
    .content-card { padding: 1.5rem; }
    .team-grid { grid-template-columns: 1fr; }
    .team-member-card { padding: 1.5rem 1rem; }
    .member-avatar { width: 3.5rem; height: 3.5rem; }
    .member-role, .member-contact, .card-details, .expand-hint { display: none; }
    .team-member-card { cursor: default; }
    .expertise-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .hero h1 { font-size: 2rem; }
    .typing-line { font-size: 1rem; }
    .hero-buttons { flex-direction: column; align-items: stretch; }
    .btn-primary, .btn-secondary { justify-content: center; text-align: center; }
    .stats-section { grid-template-columns: 1fr 1fr; gap: 1rem; }
    .stat-number { font-size: 2.25rem; }
}