/* ============================================================
   辉澜科技 — 大气专业版
   ============================================================ */

:root {
    --primary: #0B1D3A;
    --primary-light: #132c52;
    --primary-dark: #06101f;
    --accent: #C89B3C;
    --accent-light: #dbb35a;
    --accent-dark: #a17d2e;
    --bg: #F8F6F1;
    --bg-white: #FFFFFF;
    --text: #1a1a1a;
    --text-muted: #6b7280;
    --text-light: #9ca3af;
    --border: #e8e4db;
    --shadow-sm: 0 2px 10px rgba(11,29,58,0.06);
    --shadow-md: 0 8px 32px rgba(11,29,58,0.1);
    --shadow-lg: 0 24px 64px rgba(11,29,58,0.16);
    --radius: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --font-display: 'Noto Serif SC', 'Georgia', serif;
    --font-body: 'Noto Sans SC', -apple-system, 'Segoe UI', sans-serif;
    --nav-height: 76px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-height); }
body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.8;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
input, select, textarea, button { font-family: inherit; font-size: inherit; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 32px; }

/* ========== 导航 ========== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0;
    height: var(--nav-height); z-index: 1000;
    transition: background .4s, box-shadow .4s;
}
.navbar.scrolled {
    background: rgba(11,29,58,0.97);
    backdrop-filter: blur(16px);
    box-shadow: 0 2px 32px rgba(0,0,0,0.25);
}
.nav-container {
    max-width: 1240px; margin: 0 auto; padding: 0 32px;
    display: flex; align-items: center; justify-content: space-between; height: 100%;
}
.nav-logo { display: flex; align-items: center; gap: 14px; color: #fff; }
.logo-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 44px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: var(--primary);
    border-radius: 10px;
    font-family: var(--font-display);
    font-size: 17px; font-weight: 900;
    letter-spacing: 1px;
    box-shadow: 0 4px 12px rgba(200,155,60,0.3);
}
.logo-text {
    font-family: var(--font-display);
    font-size: 20px; font-weight: 700;
    letter-spacing: 3px;
}
.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-link {
    color: rgba(255,255,255,0.75);
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 14px; font-weight: 500;
    letter-spacing: 0.5px;
    transition: all .25s;
}
.nav-link:hover, .nav-link.active { color: #fff; background: rgba(255,255,255,0.08); }
.nav-cta {
    display: inline-flex; align-items: center; gap: 8px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #fff !important;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600; font-size: 14px;
    transition: all .25s;
    box-shadow: 0 4px 16px rgba(200,155,60,0.25);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(200,155,60,0.35); }
.nav-cta svg { width: 16px; height: 16px; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: #fff; margin: 5px 0; transition: all .3s; border-radius: 2px; }

/* ========== Hero ========== */
.hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    overflow: hidden;
    background: var(--primary);
}
.hero-slider { position: absolute; inset: 0; }
.hero-slide {
    position: absolute; inset: 0;
    background-size: cover; background-position: center;
    opacity: 0; transition: opacity 1.5s ease;
}
.hero-slide.active { opacity: 1; }
.hero-slide-default {
    background:
        radial-gradient(ellipse at 30% 40%, rgba(200,155,60,0.12) 0%, transparent 60%),
        radial-gradient(ellipse at 70% 70%, rgba(19,44,82,0.8) 0%, transparent 50%),
        linear-gradient(160deg, #0B1D3A 0%, #132c52 40%, #0B1D3A 100%);
}
.hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(11,29,58,0.7) 0%, rgba(11,29,58,0.5) 50%, rgba(11,29,58,0.8) 100%);
}
.hero-content {
    position: relative; z-index: 2;
    text-align: center; max-width: 860px; padding: 0 32px;
    animation: heroReveal 1.2s ease;
}
@keyframes heroReveal {
    from { opacity: 0; transform: translateY(48px); }
    to   { opacity: 1; transform: translateY(0); }
}
.hero-badge {
    display: inline-block;
    background: rgba(200,155,60,0.1);
    border: 1px solid rgba(200,155,60,0.25);
    color: var(--accent);
    padding: 8px 32px;
    border-radius: 40px;
    font-size: 12px; font-weight: 600;
    letter-spacing: 5px;
    margin-bottom: 32px;
    text-transform: uppercase;
}
.hero-title {
    font-family: var(--font-display);
    font-size: clamp(36px, 5.5vw, 64px);
    font-weight: 900;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: 2px;
}
.hero-subtitle {
    font-size: clamp(15px, 2vw, 19px);
    color: rgba(255,255,255,0.6);
    margin-bottom: 48px;
    font-weight: 300;
    letter-spacing: 2px;
    line-height: 1.8;
}
.hero-actions {
    display: flex; gap: 20px; justify-content: center;
    flex-wrap: wrap; margin-bottom: 72px;
}
.hero-stats {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 32px; max-width: 640px; margin: 0 auto;
    padding-top: 48px;
    border-top: 1px solid rgba(255,255,255,0.08);
}
.stat-item { text-align: center; }
.stat-num {
    font-family: var(--font-display);
    font-size: clamp(30px, 4vw, 48px);
    font-weight: 700; color: var(--accent);
    display: inline;
}
.stat-suffix {
    font-family: var(--font-display);
    font-size: clamp(14px, 1.5vw, 18px);
    color: var(--accent); font-weight: 600;
}
.stat-label {
    display: block;
    color: rgba(255,255,255,0.45);
    font-size: 13px; margin-top: 6px;
    letter-spacing: 1px;
}
.hero-dots {
    position: absolute; bottom: 48px; left: 50%; transform: translateX(-50%);
    z-index: 2; display: flex; gap: 10px;
}
.hero-dot {
    width: 32px; height: 3px;
    border-radius: 3px;
    border: none;
    background: rgba(255,255,255,0.2);
    cursor: pointer; transition: all .4s;
}
.hero-dot.active { background: var(--accent); width: 48px; }

/* ========== 通用板块 ========== */
.section { padding: 120px 0; }
.section-header { text-align: center; margin-bottom: 72px; }
.section-tag {
    display: inline-block;
    font-size: 11px; font-weight: 700;
    letter-spacing: 6px; text-transform: uppercase;
    color: var(--accent); margin-bottom: 16px;
}
.section-tag.light { color: var(--accent-light); }
.section-title {
    font-family: var(--font-display);
    font-size: clamp(28px, 3.5vw, 44px);
    font-weight: 700; color: var(--primary);
    margin-bottom: 16px; line-height: 1.3;
    letter-spacing: 1px;
}
.section-title.light { color: #fff; }
.section-subtitle {
    font-size: 16px; color: var(--text-muted);
    max-width: 600px; margin: 0 auto 20px;
    line-height: 1.8;
}
.section-subtitle.light { color: rgba(255,255,255,0.5); }
.title-line { width: 48px; height: 3px; background: var(--accent); margin: 0 auto; border-radius: 3px; }
.title-line.gold { background: var(--accent); }

/* ========== 关于 ========== */
.section-about { background: var(--bg-white); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.about-image { position: relative; border-radius: var(--radius-lg); overflow: hidden; }
.about-image img {
    width: 100%; height: 440px; object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}
.about-image-accent {
    position: absolute; bottom: -24px; right: -24px;
    width: 200px; height: 200px;
    border: 3px solid var(--accent);
    border-radius: var(--radius-lg);
    z-index: -1; opacity: 0.4;
}
.about-text {
    font-size: 15px; line-height: 2;
    color: var(--text-muted); margin-bottom: 40px;
}
.about-text p { margin-bottom: 16px; }
.about-highlights {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
    padding-top: 32px; border-top: 1px solid var(--border);
}
.highlight-item { text-align: center; }
.highlight-icon {
    width: 44px; height: 44px;
    background: linear-gradient(135deg, rgba(200,155,60,0.12), rgba(200,155,60,0.04));
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 12px;
    color: var(--accent-dark);
}
.highlight-icon svg { width: 20px; height: 20px; }
.highlight-num {
    display: block;
    font-family: var(--font-display);
    font-size: 30px; font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}
.highlight-label { font-size: 13px; color: var(--text-muted); letter-spacing: 0.5px; }

/* ========== 服务 ========== */
.section-services { background: var(--bg); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.service-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 44px 32px 40px;
    text-align: center;
    border: 1px solid var(--border);
    transition: all .35s cubic-bezier(.23,1,.32,1);
    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 .35s cubic-bezier(.23,1,.32,1);
    transform-origin: left;
}
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.service-icon {
    width: 64px; height: 64px;
    background: linear-gradient(135deg, rgba(11,29,58,0.06), rgba(11,29,58,0.02));
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 24px;
    color: var(--primary);
    transition: all .35s;
}
.service-icon svg { width: 28px; height: 28px; }
.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #fff;
    box-shadow: 0 8px 24px rgba(200,155,60,0.3);
}
.service-title {
    font-family: var(--font-display);
    font-size: 19px; font-weight: 700;
    color: var(--primary); margin-bottom: 12px;
    letter-spacing: 0.5px;
}
.service-desc { font-size: 14px; color: var(--text-muted); line-height: 1.8; }
.service-line { width: 0; height: 3px; background: var(--accent); margin: 24px auto 0; transition: width .4s ease; border-radius: 3px; }
.service-card:hover .service-line { width: 40px; }

/* ========== 优势 ========== */
.section-features {
    background: var(--primary);
    position: relative; overflow: hidden;
}
.features-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse at 15% 85%, rgba(200,155,60,0.06) 0%, transparent 55%),
        radial-gradient(ellipse at 85% 15%, rgba(19,44,82,0.6) 0%, transparent 50%);
}
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; position: relative; }
.feature-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-lg);
    padding: 40px 28px 36px;
    text-align: center;
    transition: all .35s cubic-bezier(.23,1,.32,1);
}
.feature-card:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(200,155,60,0.2);
    transform: translateY(-6px);
}
.feature-icon-wrap {
    width: 60px; height: 60px;
    margin: 0 auto 20px;
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(200,155,60,0.1);
    color: var(--accent);
    transition: all .35s;
}
.feature-card:hover .feature-icon-wrap {
    background: var(--accent);
    color: var(--primary);
    box-shadow: 0 8px 24px rgba(200,155,60,0.25);
}
.feature-icon-wrap svg { width: 26px; height: 26px; }
.feature-card h3 {
    color: #fff; font-size: 18px; font-weight: 600;
    margin-bottom: 10px; letter-spacing: 0.5px;
}
.feature-card p { color: rgba(255,255,255,0.5); font-size: 14px; line-height: 1.8; }

/* ========== 联系 ========== */
.section-contact { background: var(--bg-white); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 56px; align-items: start; }
.contact-item {
    display: flex; align-items: flex-start; gap: 20px;
    padding: 24px 0; border-bottom: 1px solid var(--border);
}
.contact-item:last-child { border-bottom: none; }
.contact-icon {
    width: 56px; height: 56px;
    background: linear-gradient(135deg, rgba(11,29,58,0.06), rgba(11,29,58,0.02));
    border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    color: var(--primary);
    transition: all .3s;
}
.contact-icon svg { width: 22px; height: 22px; }
.contact-icon.wechat-icon {
    background: linear-gradient(135deg, #07c160, #06ad56);
    color: #fff;
}
.contact-item:hover .contact-icon:not(.wechat-icon) {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #fff;
}
.contact-item h4 { font-size: 15px; font-weight: 600; color: var(--primary); margin-bottom: 6px; }
.contact-item p { color: var(--text-muted); font-size: 15px; }

/* 表单 */
.contact-form {
    background: var(--bg);
    padding: 44px 40px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 24px; }
.form-group label {
    display: block; font-size: 14px; font-weight: 600;
    color: var(--text); margin-bottom: 10px; letter-spacing: 0.5px;
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%; padding: 14px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-white); color: var(--text);
    transition: border-color .25s, box-shadow .25s;
    outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(200,155,60,0.1);
}
.form-group textarea { resize: vertical; }

/* ========== Footer ========== */
.footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.6);
    padding: 0 0 0; position: relative;
}
.footer-wave {
    margin-bottom: -2px; line-height: 0;
}
.footer-wave svg { width: 100%; height: 60px; }
.footer .container { padding-top: 56px; padding-bottom: 0; }
.footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr;
    gap: 48px; padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.footer-logo .logo-icon { width: 38px; height: 38px; font-size: 14px; }
.footer-logo .logo-text { color: #fff; font-size: 17px; font-weight: 700; }
.footer-desc { font-size: 14px; line-height: 1.8; max-width: 360px; }
.footer-links h4, .footer-contact h4 {
    color: #fff; font-size: 16px; font-weight: 600;
    margin-bottom: 24px; letter-spacing: 1px;
}
.footer-links ul li { margin-bottom: 12px; }
.footer-links a { font-size: 14px; transition: color .2s; letter-spacing: 0.3px; }
.footer-links a:hover { color: var(--accent); }
.footer-contact p {
    font-size: 14px; margin-bottom: 14px;
    display: flex; align-items: center; gap: 10px;
}
.footer-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 18px; height: 18px; flex-shrink: 0; opacity: 0.5;
}
.footer-icon svg { width: 16px; height: 16px; }
.footer-bottom {
    text-align: center; padding: 24px 0;
    font-size: 13px; color: rgba(255,255,255,0.3);
    letter-spacing: 0.5px;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 14px 32px;
    border-radius: var(--radius);
    font-weight: 600; font-size: 15px;
    border: 2px solid transparent;
    cursor: pointer; transition: all .3s;
    letter-spacing: 0.5px;
}
.btn-gold {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #fff; border-color: transparent;
    box-shadow: 0 4px 20px rgba(200,155,60,0.3);
}
.btn-gold:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(200,155,60,0.4);
}
.btn-outline {
    background: transparent; color: #fff;
    border-color: rgba(255,255,255,0.2);
}
.btn-outline:hover {
    border-color: rgba(255,255,255,0.5);
    background: rgba(255,255,255,0.06);
}
.btn-outline svg { width: 16px; height: 16px; }
.btn-lg { padding: 16px 40px; font-size: 16px; }
.btn-block { width: 100%; justify-content: center; }

/* ========== 客服聊天 ========== */
.chat-widget { position: fixed; bottom: 28px; right: 28px; z-index: 9999; }
.chat-bubble {
    width: 64px; height: 64px; border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #fff; border: none; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 6px 28px rgba(200,155,60,0.4);
    transition: all .3s; position: relative;
}
.chat-bubble:hover {
    transform: scale(1.06);
    box-shadow: 0 8px 36px rgba(200,155,60,0.5);
}
.chat-badge {
    position: absolute; top: -4px; right: -4px;
    width: 22px; height: 22px;
    background: #ef4444; color: #fff;
    border-radius: 50%; font-size: 12px; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    border: 2px solid #fff;
}
.chat-window {
    position: absolute; bottom: 80px; right: 0;
    width: 400px; max-height: 540px;
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: 0 24px 80px rgba(11,29,58,0.2);
    display: none; flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--border);
    animation: chatSlideUp .35s cubic-bezier(.23,1,.32,1);
}
.chat-window.open { display: flex; }
@keyframes chatSlideUp {
    from { opacity: 0; transform: translateY(20px) scale(0.96); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}
.chat-header {
    background: var(--primary);
    color: #fff; padding: 20px 24px;
    display: flex; align-items: center; justify-content: space-between;
}
.chat-header-info { display: flex; align-items: center; gap: 14px; }
.chat-avatar {
    width: 42px; height: 42px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #fff; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 17px;
    font-family: var(--font-display);
}
.chat-header h4 { font-size: 15px; font-weight: 600; letter-spacing: 0.5px; }
.chat-status { font-size: 12px; color: rgba(255,255,255,0.6); display: flex; align-items: center; gap: 6px; }
.status-dot { width: 8px; height: 8px; background: #22c55e; border-radius: 50%; display: inline-block; }
.chat-close {
    background: none; border: none;
    color: rgba(255,255,255,0.5);
    font-size: 22px; cursor: pointer;
    padding: 4px 8px; transition: color .2s;
    line-height: 1;
}
.chat-close:hover { color: #fff; }
.chat-messages {
    flex: 1; padding: 20px;
    overflow-y: auto; background: var(--bg);
    min-height: 320px; max-height: 360px;
    display: flex; flex-direction: column; gap: 14px;
}
.msg {
    max-width: 80%; padding: 12px 16px;
    border-radius: 16px; font-size: 14px;
    line-height: 1.6; animation: msgIn .3s ease;
}
@keyframes msgIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.msg-visitor {
    align-self: flex-end;
    background: var(--primary); color: #fff;
    border-bottom-right-radius: 4px;
}
.msg-admin {
    align-self: flex-start;
    background: var(--bg-white); color: var(--text);
    border: 1px solid var(--border);
    border-bottom-left-radius: 4px;
}
.msg-time { font-size: 11px; color: var(--text-light); margin-top: 4px; display: block; }
.msg-visitor .msg-time { color: rgba(255,255,255,0.45); text-align: right; }
.chat-input-area {
    display: flex; padding: 16px 20px;
    border-top: 1px solid var(--border);
    background: var(--bg-white); gap: 10px;
}
.chat-input {
    flex: 1; border: 1px solid var(--border);
    border-radius: 24px; padding: 12px 20px;
    outline: none; transition: border-color .25s, box-shadow .25s;
    font-size: 14px;
}
.chat-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(200,155,60,0.1); }
.chat-send {
    width: 46px; height: 46px; border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #fff; border: none; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all .25s; flex-shrink: 0;
    box-shadow: 0 4px 16px rgba(200,155,60,0.3);
}
.chat-send:hover { transform: scale(1.06); }

/* ========== 动画 ========== */
.reveal, .reveal-left, .reveal-right { opacity: 0; transition: opacity .7s ease, transform .7s ease; }
.reveal        { transform: translateY(36px); }
.reveal-left   { transform: translateX(-36px); }
.reveal-right  { transform: translateX(36px); }
.reveal.visible, .reveal-left.visible, .reveal-right.visible { opacity: 1; transform: translate(0); }

@keyframes bounce { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.08); } }
.chat-bubble.pulse { animation: bounce .6s ease; }

/* 自定义板块 */
.section-custom .custom-content { max-width: 800px; margin: 0 auto; font-size: 15px; line-height: 2; color: var(--text-muted); }
.custom-content p { margin-bottom: 16px; }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 48px; }
    .services-grid, .features-grid { grid-template-columns: repeat(2, 1fr); }
    .about-image-accent { display: none; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    :root { --nav-height: 64px; }
    .section { padding: 72px 0; }
    .nav-toggle { display: block; }
    .nav-menu {
        position: fixed; top: var(--nav-height); left: 0; right: 0;
        background: rgba(11,29,58,0.98); backdrop-filter: blur(16px);
        flex-direction: column; padding: 16px; gap: 4px;
        transform: translateY(-120%); transition: transform .35s ease;
    }
    .nav-menu.open { transform: translateY(0); }
    .nav-link { padding: 14px 16px; width: 100%; text-align: center; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .services-grid, .features-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .chat-window { width: calc(100vw - 40px); right: -12px; }
    .contact-form { padding: 28px 24px; }
}
@media (max-width: 480px) {
    .hero-actions { flex-direction: column; align-items: center; }
    .btn-lg { width: 100%; justify-content: center; }
    .stat-num { font-size: 26px; }
    .container { padding: 0 20px; }
}