/* ===================================
   大圣智慧物业 — 主样式表
   设计风格：现代简洁、专业可信赖
   =================================== */

:root {
    --primary: #1a3a5c;
    --primary-light: #2c5f8a;
    --accent: #f7931e;
    --accent-light: #ffb74d;
    --accent-dark: #e65100;
    --gold: #ff6b35;
    --text: #1a1a2e;
    --text-light: #555;
    --text-muted: #888;
    --bg: #f8fafb;
    --bg-card: #fff;
    --border: #e8edf2;
    --shadow: 0 2px 20px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { border: none; cursor: pointer; background: none; font: inherit; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== Header ========== */
#header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    transition: all var(--transition);
    padding: 16px 0;
}
#header.scrolled {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 20px rgba(0,0,0,0.06);
    padding: 10px 0;
}
#header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1001;
}
.logo-text { display: flex; flex-direction: column; }
.logo-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.5px;
    transition: color var(--transition);
}
.scrolled .logo-name { color: var(--primary); }
.logo-sub {
    font-size: 0.65rem;
    color: rgba(255,255,255,0.7);
    letter-spacing: 2px;
    font-weight: 500;
    transition: color var(--transition);
}
.scrolled .logo-sub { color: var(--text-muted); }

#nav {
    display: flex;
    align-items: center;
    gap: 32px;
}
#nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: rgba(255,255,255,0.85);
    position: relative;
    transition: color var(--transition);
    padding: 4px 0;
}
.scrolled #nav a { color: var(--text); }
#nav a:hover,
#nav a.active { color: #fff; }
.scrolled #nav a:hover,
.scrolled #nav a.active { color: var(--accent); }
#nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition);
}
#nav a:hover::after,
#nav a.active::after { width: 100%; }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    z-index: 1001;
    padding: 4px;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    transition: all var(--transition);
}
.scrolled .nav-toggle span { background: var(--text); }

/* ========== Hero ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0f2027 0%, #1a3a5c 40%, #203a43 100%);
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(247,147,30,0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 30%, rgba(201,168,76,0.08) 0%, transparent 50%);
}
.hero-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.03;
    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' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='1'%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");
}
.hero .container {
    position: relative;
    z-index: 2;
    padding-top: 80px;
}
.hero-content { max-width: 700px; }
.hero-title { margin-bottom: 24px; }
.hero-title-sub {
    display: block;
    font-size: 1.5rem;
    font-weight: 400;
    color: rgba(255,255,255,0.7);
    letter-spacing: 4px;
    margin-bottom: 8px;
}
.hero-title-main {
    display: block;
    font-size: 3.5rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.15;
    background: linear-gradient(135deg, #fff 0%, #a8d8b9 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.6);
    line-height: 1.9;
    margin-bottom: 36px;
    max-width: 520px;
}
.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 13px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all var(--transition);
    letter-spacing: 0.5px;
}
.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 20px rgba(247,147,30,0.3);
}
.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(247,147,30,0.4);
}
.btn-outline {
    border: 2px solid rgba(255,255,255,0.3);
    color: #fff;
}
.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: #fff;
}
.btn-outline-white {
    border: 2px solid rgba(255,255,255,0.3);
    color: #fff;
}
.btn-outline-white:hover {
    background: rgba(255,255,255,0.15);
    border-color: #fff;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding-top: 36px;
    border-top: 1px solid rgba(255,255,255,0.1);
}
.stat-item { text-align: center; }
.stat-num {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
}
.stat-label {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    margin-top: 4px;
}
.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: rgba(255,255,255,0.4);
    font-size: 0.8rem;
    animation: bounce 2s infinite;
    z-index: 3;
}
@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ========== Section Common ========== */
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
    display: inline-block;
    padding: 6px 20px;
    background: rgba(247,147,30,0.08);
    color: var(--accent);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 16px;
}
.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}
.section-desc {
    font-size: 1.05rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ========== Services Grid ========== */
.services { background: #fff; }
.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.service-card {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    border: 1px solid var(--border);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    transform: scaleX(0);
    transition: transform var(--transition);
}
.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.service-card:hover::before { transform: scaleX(1); }
.service-icon { margin-bottom: 20px; }
.service-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}
.service-card > p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 16px;
    line-height: 1.7;
}
.service-card ul {
    margin-bottom: 20px;
}
.service-card ul li {
    font-size: 0.85rem;
    color: var(--text-light);
    padding: 4px 0 4px 18px;
    position: relative;
}
.service-card ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-light);
}
.service-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent);
    transition: color var(--transition);
}
.service-link:hover { color: var(--accent-dark); }

/* ========== Smart Section ========== */
.smart { background: var(--bg); }
.smart-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.smart-text .section-title { text-align: left; max-width: 450px; }
.smart-text > p {
    font-size: 1rem;
    color: var(--text-light);
    margin: 20px 0 36px;
    max-width: 480px;
}
.smart-features { display: grid; gap: 20px; }
.sf-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}
.sf-icon {
    width: 44px;
    height: 44px;
    background: #fff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
    box-shadow: var(--shadow);
}
.sf-item h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
.sf-item p { font-size: 0.85rem; color: var(--text-light); }
.smart-visual { display: flex; justify-content: center; }
.smart-mockup {
    background: linear-gradient(135deg, #1a3a5c, #2c5f8a);
    border-radius: 24px;
    padding: 4px;
    box-shadow: 0 20px 60px rgba(26,58,92,0.3);
}
.mockup-screen {
    background: #fff;
    border-radius: 20px;
    padding: 20px;
    width: 360px;
}
.mockup-header {
    text-align: center;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
.mockup-card {
    background: var(--bg);
    border-radius: 10px;
    padding: 14px 16px;
    margin-bottom: 10px;
}
.mockup-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 0.8rem;
}
.m-label { color: var(--text-light); }
.m-val { font-weight: 700; }
.m-val.good { color: var(--accent); }
.m-val.low { color: #e74c3c; }
.mockup-bar {
    height: 6px;
    background: #e0e0e0;
    border-radius: 3px;
    overflow: hidden;
}
.mockup-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    border-radius: 3px;
    transition: width 1.5s ease;
}
.mockup-fill.green { background: linear-gradient(90deg, #27ae60, #2ecc71); }
.mockup-fill.low-fill { background: linear-gradient(90deg, #f39c12, #f1c40f); }

/* ========== Why Us ========== */
.why-us { background: #fff; }
.why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.why-card {
    text-align: center;
    padding: 40px 24px;
    border-radius: var(--radius-lg);
    transition: all var(--transition);
    border: 1px solid transparent;
}
.why-card:hover {
    border-color: var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}
.why-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(247,147,30,0.1), rgba(247,147,30,0.2));
    color: var(--accent);
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 20px;
}
.why-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
}
.why-card p { font-size: 0.9rem; color: var(--text-light); line-height: 1.7; }

/* ========== Terminals (三端入口) ========== */
.terminals { background: #fff; padding: 60px 0 80px; margin-top: -60px; position: relative; z-index: 2; }
.terminals-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.terminal-card {
    display: block;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    border: 2px solid var(--border);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.terminal-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    transform: scaleX(0);
    transition: transform var(--transition);
}
.terminal-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-light);
}
.terminal-card:hover::before { transform: scaleX(1); }
.terminal-icon { font-size: 2.5rem; margin-bottom: 12px; }
.terminal-tag {
    display: inline-block;
    padding: 3px 14px;
    background: rgba(247,147,30,0.1);
    color: var(--accent);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 12px;
}
.terminal-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.terminal-card p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; margin-bottom: 12px; }
.terminal-link { font-size: 0.9rem; font-weight: 600; color: var(--accent); }

/* ========== Features Grid (核心功能) ========== */
.features { background: var(--bg); }
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.feature-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    border: 1px solid var(--border);
    transition: all var(--transition);
}
.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.feature-icon { font-size: 2.2rem; margin-bottom: 16px; }
.feature-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.feature-card p { font-size: 0.9rem; color: var(--text-light); line-height: 1.7; }

/* ========== Scenes Grid (应用场景) ========== */
.scenes { background: #fff; }
.scenes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.scene-card {
    background: var(--bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all var(--transition);
}
.scene-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.scene-img {
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}
.scene-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    padding: 16px 24px 4px;
    color: var(--text);
}
.scene-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    padding: 0 24px 24px;
    line-height: 1.7;
}

/* ========== Clients ========== */
.clients { background: var(--bg); }
.clients-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.client-item {
    background: #fff;
    padding: 32px 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}
.client-item span {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: color var(--transition);
}
.client-item:hover span { color: var(--accent); }
.client-item:hover { background: rgba(247,147,30,0.03); }

/* ========== CTA ========== */
.cta { padding: 60px 0 100px; background: var(--bg); }
.cta-wrapper {
    background: linear-gradient(135deg, #1a3a5c 0%, #2c5f8a 50%, #e65100 100%);
    border-radius: var(--radius-lg);
    padding: 64px 48px;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}
.cta-wrapper::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 80% 20%, rgba(255,255,255,0.06) 0%, transparent 50%);
}
.cta-wrapper > * { position: relative; z-index: 1; }
.cta-wrapper h2 { font-size: 2rem; font-weight: 800; margin-bottom: 12px; }
.cta-wrapper p { font-size: 1.05rem; opacity: 0.8; margin-bottom: 32px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; }

/* ========== Footer ========== */
#footer {
    background: #0f1923;
    color: rgba(255,255,255,0.7);
    padding: 60px 0 30px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand .logo-name { color: #fff !important; font-size: 1.1rem; }
.footer-brand > p { font-size: 0.85rem; margin-top: 8px; opacity: 0.6; }
.footer-links h4,
.footer-contact h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}
.footer-links a {
    display: block;
    font-size: 0.85rem;
    padding: 6px 0;
    opacity: 0.7;
    transition: opacity var(--transition);
}
.footer-links a:hover { opacity: 1; color: var(--accent-light); }
.footer-contact p {
    font-size: 0.85rem;
    padding: 4px 0;
    opacity: 0.7;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    opacity: 0.5;
}
.footer-bottom a { opacity: 0.7; transition: opacity var(--transition); }
.footer-bottom a:hover { opacity: 1; }

/* ========== Page Banner (Subpages) ========== */
.page-banner {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #1a3a5c, #2c5f8a);
    color: #fff;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.page-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(247,147,30,0.1) 0%, transparent 70%);
}
.page-banner .container { position: relative; z-index: 1; }
.page-banner h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 12px; }
.page-banner p { font-size: 1.1rem; opacity: 0.7; }
.breadcrumb {
    display: flex;
    gap: 8px;
    justify-content: center;
    font-size: 0.85rem;
    opacity: 0.6;
    margin-top: 16px;
}
.breadcrumb a:hover { opacity: 1; }

/* ========== Solution Page ========== */
.solution-detail { padding: 80px 0; background: #fff; }
.solution-detail:nth-child(even) { background: var(--bg); }
.solution-detail .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.solution-detail:nth-child(even) .container { direction: rtl; }
.solution-detail:nth-child(even) .sd-text { direction: ltr; }
.sd-text h2 { font-size: 1.8rem; font-weight: 800; margin-bottom: 20px; }
.sd-text p { color: var(--text-light); line-height: 1.9; margin-bottom: 20px; }
.sd-text ul { margin-top: 16px; }
.sd-text ul li {
    padding: 8px 0 8px 24px;
    position: relative;
    color: var(--text-light);
}
.sd-text ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}
.sd-visual {
    background: linear-gradient(135deg, #f0f4f8, #e8f0f5);
    border-radius: var(--radius-lg);
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--primary-light);
}

/* ========== About Page ========== */
.about-intro { padding: 80px 0; background: #fff; }
.about-intro .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.about-visual {
    background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
    border-radius: var(--radius-lg);
    height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
}
.about-text h2 { font-size: 2rem; font-weight: 800; margin-bottom: 24px; }
.about-text p { color: var(--text-light); line-height: 1.9; margin-bottom: 16px; }

.about-values { padding: 80px 0; background: var(--bg); }
.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.value-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 40px 28px;
    text-align: center;
    transition: all var(--transition);
}
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.value-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    display: block;
}
.value-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.value-card p { font-size: 0.9rem; color: var(--text-light); }

.about-timeline { padding: 80px 0; background: #fff; }
.timeline { max-width: 700px; margin: 0 auto; position: relative; padding-left: 40px; }
.timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), var(--accent-light), var(--border));
}
.timeline-item { position: relative; margin-bottom: 40px; }
.timeline-item::before {
    content: '';
    position: absolute;
    left: -34px;
    top: 4px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid #fff;
    box-shadow: 0 0 0 3px rgba(247,147,30,0.2);
}
.timeline-year {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 4px;
}
.timeline-item h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; }
.timeline-item p { font-size: 0.9rem; color: var(--text-light); }

/* ========== Contact Page ========== */
.contact-section { padding: 80px 0; background: #fff; }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}
.contact-info h2 { font-size: 2rem; font-weight: 800; margin-bottom: 20px; }
.contact-info > p { color: var(--text-light); margin-bottom: 32px; }
.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 24px;
}
.contact-item-icon {
    width: 48px;
    height: 48px;
    background: rgba(247,147,30,0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}
.contact-item h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
.contact-item p { font-size: 0.9rem; color: var(--text-light); }

.contact-form {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid var(--border);
}
.contact-form h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 24px; }
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color var(--transition);
    background: #fff;
    color: var(--text);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(247,147,30,0.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: #fff;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}
.form-submit:hover { background: var(--accent-dark); transform: translateY(-1px); }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .services-grid,
    .why-grid,
    .values-grid,
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .terminals-grid,
    .scenes-grid { grid-template-columns: repeat(3, 1fr); }
    .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .smart-wrapper { grid-template-columns: 1fr; gap: 40px; }
    .smart-mockup { max-width: 360px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid,
    .about-intro .container,
    .solution-detail .container { grid-template-columns: 1fr; }
    .solution-detail:nth-child(even) .container { direction: ltr; }
    .sd-visual,
    .about-visual { height: 200px; }
}

@media (max-width: 768px) {
    .hero-title-main { font-size: 2.2rem; }
    .hero-title-sub { font-size: 1.1rem; }
    .hero-desc { font-size: 0.95rem; }
    .hero-actions { flex-direction: column; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .section-title { font-size: 1.7rem; }
    .section { padding: 60px 0; }
    .services-grid,
    .why-grid,
    .values-grid,
    .features-grid { grid-template-columns: 1fr; }
    .terminals-grid,
    .scenes-grid,
    .clients-grid { grid-template-columns: repeat(2, 1fr); }
    .nav-toggle { display: flex; }
    #nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: #fff;
        flex-direction: column;
        padding: 100px 32px 40px;
        gap: 24px;
        box-shadow: -4px 0 30px rgba(0,0,0,0.1);
        transition: right var(--transition);
    }
    #nav.open { right: 0; }
    #nav a { color: var(--text) !important; font-size: 1.1rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
    .cta-wrapper { padding: 40px 24px; }
    .cta-wrapper h2 { font-size: 1.5rem; }
    .cta-actions { flex-direction: column; }
    .contact-form { padding: 28px; }
    .timeline { padding-left: 32px; }
    .timeline-item::before { left: -27px; }
}