/* ============================================
   昭通艾科科技有限公司 - 企业官网样式
   Style: 简约大气 · 科技蓝调
   ============================================ */

/* --- CSS Variables --- */
:root {
    --primary: #0f2b46;
    --primary-light: #1a3a5c;
    --accent: #00B4D8;
    --accent-dark: #0096b7;
    --accent-glow: rgba(0, 180, 216, 0.15);
    --accent-glow-strong: rgba(0, 180, 216, 0.3);
    --text-dark: #0f172a;
    --text-body: #334155;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-section: #f1f5f9;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* --- Reset & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
    font-family: var(--font);
    color: var(--text-body);
    background: var(--bg-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: color var(--transition); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* --- Navbar --- */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition);
}
.navbar.scrolled {
    background: rgba(255,255,255,0.95);
    border-bottom-color: var(--border);
    box-shadow: var(--shadow-sm);
}
.nav-container {
    max-width: 1200px; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
    height: 72px;
}
.nav-logo {
    display: flex; align-items: center; gap: 10px;
}
.logo-icon svg { width: 36px; height: 36px; }
.logo-text { display: flex; flex-direction: column; }
.logo-name {
    font-size: 17px; font-weight: 700; color: var(--primary);
    line-height: 1.2; letter-spacing: 1px;
}
.logo-sub {
    font-size: 10px; color: var(--text-muted);
    letter-spacing: 2px; line-height: 1;
}
.nav-links { display: flex; gap: 8px; }
.nav-link {
    padding: 8px 18px; border-radius: 8px;
    font-size: 15px; font-weight: 500; color: var(--text-body);
    transition: all var(--transition);
}
.nav-link:hover { color: var(--accent); background: var(--accent-glow); }
.nav-link.active { color: var(--accent); background: var(--accent-glow); }
.nav-cta {
    padding: 10px 24px; border-radius: 10px;
    background: var(--accent); color: #fff;
    font-size: 14px; font-weight: 600;
    transition: all var(--transition);
}
.nav-cta:hover { background: var(--accent-dark); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,180,216,0.3); }
.nav-toggle {
    display: none; background: none; border: none; cursor: pointer;
    flex-direction: column; gap: 5px; padding: 4px;
}
.nav-toggle span {
    width: 22px; height: 2px; background: var(--text-dark);
    border-radius: 2px; transition: all var(--transition);
}

/* --- Hero --- */
.hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #0a1628 0%, #0f2b46 40%, #132f50 100%);
    overflow: hidden; padding: 120px 24px 80px;
}
.hero-bg {
    position: absolute; inset: 0; pointer-events: none;
}
.hero-grid {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(0,180,216,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,180,216,0.05) 1px, transparent 1px);
    background-size: 60px 60px;
}
.hero-glow {
    position: absolute;
    width: 600px; height: 600px;
    top: -100px; right: -100px;
    background: radial-gradient(circle, rgba(0,180,216,0.12) 0%, transparent 70%);
    border-radius: 50%;
}
.hero-content {
    position: relative; z-index: 1; text-align: center; max-width: 800px;
}
.hero-badge {
    display: inline-block;
    padding: 8px 20px; border-radius: 50px;
    background: rgba(0,180,216,0.1);
    border: 1px solid rgba(0,180,216,0.2);
    color: var(--accent); font-size: 14px; font-weight: 500;
    margin-bottom: 32px; letter-spacing: 2px;
}
.hero-title {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 700; line-height: 1.2; color: #fff;
    margin-bottom: 24px;
}
.title-line { display: block; }
.title-accent {
    display: block;
    background: linear-gradient(135deg, #00B4D8, #48cae4);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 17px; line-height: 1.8; color: rgba(255,255,255,0.65);
    max-width: 620px; margin: 0 auto 40px;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 60px; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 14px 32px; border-radius: 12px;
    font-size: 15px; font-weight: 600; cursor: pointer;
    transition: all var(--transition); border: none;
}
.btn-primary {
    background: var(--accent); color: #fff;
    box-shadow: 0 4px 20px rgba(0,180,216,0.3);
}
.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,180,216,0.4);
}
.btn-outline {
    background: transparent; color: #fff;
    border: 1.5px solid rgba(255,255,255,0.25);
}
.btn-outline:hover {
    border-color: var(--accent); color: var(--accent);
    background: rgba(0,180,216,0.08);
}
.btn-full { width: 100%; }

/* Hero Stats */
.hero-stats {
    display: flex; gap: 40px; justify-content: center; flex-wrap: wrap;
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.08);
}
.stat-item { text-align: center; }
.stat-num {
    font-size: 36px; font-weight: 700; color: #fff;
    display: inline; font-variant-numeric: tabular-nums;
}
.stat-suffix { font-size: 18px; font-weight: 600; color: var(--accent); }
.stat-label { display: block; font-size: 13px; color: rgba(255,255,255,0.45); margin-top: 4px; }

/* Scroll Hint */
.scroll-hint {
    position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.scroll-hint span { font-size: 12px; color: rgba(255,255,255,0.3); letter-spacing: 2px; }
.scroll-arrow {
    width: 20px; height: 20px;
    border-right: 2px solid rgba(255,255,255,0.3);
    border-bottom: 2px solid rgba(255,255,255,0.3);
    transform: rotate(45deg);
    animation: scrollBounce 2s infinite;
}
@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translateY(0); opacity: 1; }
    50% { transform: rotate(45deg) translateY(8px); opacity: 0.5; }
}

/* --- Section Headers --- */
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
    display: inline-block;
    padding: 6px 16px; border-radius: 50px;
    background: var(--accent-glow);
    color: var(--accent); font-size: 13px; font-weight: 600;
    letter-spacing: 1px; margin-bottom: 16px;
}
.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700; color: var(--text-dark);
    line-height: 1.3; margin-bottom: 12px;
}
.section-desc { font-size: 16px; color: var(--text-muted); max-width: 540px; margin: 0 auto; }

/* --- Services Preview --- */
.services-preview {
    padding: 100px 0;
    background: var(--bg-white);
}
.services-grid {
    display: grid; grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}
.service-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 24px;
    text-align: center;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.service-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0;
    height: 3px; background: var(--accent);
    transform: scaleX(0); transition: transform var(--transition);
}
.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
    width: 64px; height: 64px; margin: 0 auto 20px;
    color: var(--accent);
}
.service-icon svg { width: 100%; height: 100%; }
.service-name {
    font-size: 18px; font-weight: 700; color: var(--text-dark);
    margin-bottom: 8px;
}
.service-brief {
    font-size: 13px; color: var(--text-muted); margin-bottom: 16px;
    line-height: 1.6;
}
.service-link {
    font-size: 14px; color: var(--accent); font-weight: 500;
    opacity: 0; transform: translateY(8px);
    transition: all var(--transition);
}
.service-card:hover .service-link {
    opacity: 1; transform: translateY(0);
}

/* --- About --- */
.about {
    padding: 100px 0;
    background: var(--bg-section);
}
.about-layout {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 60px; align-items: center;
}
.about-visual { position: relative; }
.about-img-wrapper { position: relative; }
.about-img-placeholder {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.about-img-placeholder svg {
    width: 100%; height: auto; display: block;
}
.about-float-card {
    position: absolute; bottom: -20px; right: -20px;
    background: var(--accent);
    color: #fff; padding: 20px 28px;
    border-radius: var(--radius);
    box-shadow: 0 8px 32px rgba(0,180,216,0.3);
    text-align: center;
}
.float-num { display: block; font-size: 36px; font-weight: 700; line-height: 1; }
.float-label { font-size: 13px; opacity: 0.9; }
.about-content .section-tag { display: inline-block; margin-bottom: 12px; }
.about-content .section-title { text-align: left; margin-bottom: 20px; }
.about-text {
    font-size: 15px; line-height: 1.9; color: var(--text-body);
    margin-bottom: 16px;
}
.about-features { margin-top: 32px; display: flex; flex-direction: column; gap: 20px; }
.about-feature {
    display: flex; align-items: flex-start; gap: 16px;
}
.feature-icon {
    width: 44px; height: 44px; flex-shrink: 0;
    background: var(--accent-glow);
    border-radius: 10px; display: flex; align-items: center; justify-content: center;
    color: var(--accent);
}
.feature-icon svg { width: 22px; height: 22px; }
.about-feature h4 {
    font-size: 15px; font-weight: 600; color: var(--text-dark);
    margin-bottom: 2px;
}
.about-feature p { font-size: 13px; color: var(--text-muted); }

/* --- Services Detail --- */
.services {
    padding: 100px 0;
    background: var(--bg-white);
}
.services-detail {
    display: flex; flex-direction: column; gap: 24px;
}
.service-detail-card {
    display: grid; grid-template-columns: auto 1fr auto;
    gap: 32px; align-items: start;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
    transition: all var(--transition);
}
.service-detail-card:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 24px rgba(0,180,216,0.08);
}
.sdc-number {
    font-size: 48px; font-weight: 800; color: var(--border-light);
    line-height: 1; padding-top: 4px;
    min-width: 70px;
    transition: color var(--transition);
}
.service-detail-card:hover .sdc-number { color: var(--accent-glow-strong); }
.sdc-icon-wrap {
    width: 56px; height: 56px; margin-bottom: 16px;
}
.sdc-icon-wrap svg { width: 100%; height: 100%; }
.sdc-content h3 {
    font-size: 22px; font-weight: 700; color: var(--text-dark);
    margin-bottom: 10px;
}
.sdc-content p {
    font-size: 15px; color: var(--text-muted); line-height: 1.8;
    margin-bottom: 16px;
}
.sdc-features {
    display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.sdc-features li {
    font-size: 14px; color: var(--text-body);
    padding-left: 20px; position: relative;
}
.sdc-features li::before {
    content: '';
    position: absolute; left: 0; top: 8px;
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--accent-glow-strong);
    border: 2px solid var(--accent);
}
.sdc-scenarios {
    display: flex; flex-direction: column; gap: 8px;
    align-self: center;
    min-width: 100px;
}
.scenario-tag {
    padding: 6px 14px; border-radius: 6px;
    background: var(--bg-section); color: var(--text-muted);
    font-size: 12px; text-align: center; white-space: nowrap;
    transition: all var(--transition);
}
.service-detail-card:hover .scenario-tag {
    background: var(--accent-glow); color: var(--accent);
}

/* --- Process --- */
.process {
    padding: 100px 0;
    background: var(--bg-section);
}
.process-steps {
    display: flex; align-items: flex-start; justify-content: center;
    gap: 0; position: relative;
}
.process-step {
    flex: 1; text-align: center; position: relative;
    padding: 0 20px;
}
.step-num {
    font-size: 32px; font-weight: 800; color: var(--accent);
    margin-bottom: 16px;
}
.step-line {
    width: 40px; height: 3px;
    background: var(--accent);
    margin: 0 auto 16px;
    border-radius: 2px;
}
.process-step h4 {
    font-size: 16px; font-weight: 700; color: var(--text-dark);
    margin-bottom: 6px;
}
.process-step p {
    font-size: 13px; color: var(--text-muted); line-height: 1.6;
}

/* --- Contact --- */
.contact {
    padding: 100px 0;
    background: var(--bg-white);
}
.contact-layout {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 60px; align-items: start;
}
.contact-info .section-tag { display: inline-block; margin-bottom: 12px; }
.contact-info .section-title { text-align: left; margin-bottom: 16px; }
.contact-desc {
    font-size: 15px; color: var(--text-muted); line-height: 1.8;
    margin-bottom: 32px;
}
.contact-items { display: flex; flex-direction: column; gap: 24px; }
.contact-item {
    display: flex; align-items: center; gap: 16px;
}
.ci-icon {
    width: 48px; height: 48px; flex-shrink: 0;
    background: var(--accent-glow);
    border-radius: 12px; display: flex; align-items: center; justify-content: center;
    color: var(--accent);
}
.ci-icon svg { width: 22px; height: 22px; }
.contact-item h4 {
    font-size: 13px; color: var(--text-muted); font-weight: 500;
    margin-bottom: 2px;
}
.contact-item p { font-size: 15px; color: var(--text-dark); font-weight: 600; }

/* Contact Form */
.contact-form-wrap {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
}
.contact-form h3 {
    font-size: 22px; font-weight: 700; color: var(--text-dark);
    margin-bottom: 6px;
}
.contact-form > p {
    font-size: 14px; color: var(--text-muted); margin-bottom: 28px;
}
.form-group { margin-bottom: 16px; }
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%; padding: 14px 18px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 15px; font-family: var(--font);
    color: var(--text-dark);
    background: var(--bg-light);
    transition: all var(--transition);
    outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    background: var(--bg-white);
    box-shadow: 0 0 0 4px var(--accent-glow);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-group select { cursor: pointer; }
.contact-form .btn { margin-top: 8px; padding: 16px 32px; font-size: 16px; }

/* --- Footer --- */
.footer {
    background: var(--primary);
    padding: 60px 0 0;
}
.footer-top {
    display: flex; justify-content: space-between;
    gap: 60px; padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand { max-width: 300px; }
.footer-brand .nav-logo { margin-bottom: 16px; }
.footer-brand .logo-name { color: #fff; }
.footer-brand .logo-sub { color: rgba(255,255,255,0.4); }
.footer-desc {
    font-size: 14px; color: rgba(255,255,255,0.4);
    line-height: 1.8;
}
.footer-links-group { display: flex; gap: 60px; }
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col h4 {
    font-size: 15px; font-weight: 600; color: #fff;
    margin-bottom: 6px;
}
.footer-col a {
    font-size: 14px; color: rgba(255,255,255,0.45);
    transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px 0;
}
.footer-bottom p {
    font-size: 13px; color: rgba(255,255,255,0.25);
}

/* --- News Section (首页) --- */
.news-section {
    padding: 100px 0;
    background: var(--bg-section);
}
.news-tabs {
    display: flex; gap: 8px; justify-content: center;
    margin-bottom: 40px;
}
.news-tabs-page { justify-content: flex-start; }
.news-tab {
    padding: 8px 22px; border-radius: 50px;
    background: var(--bg-white); border: 1px solid var(--border);
    font-size: 14px; font-weight: 500; color: var(--text-muted);
    cursor: pointer; transition: all var(--transition);
    font-family: var(--font);
}
.news-tab:hover { color: var(--accent); border-color: var(--accent); }
.news-tab.active {
    background: var(--accent); color: #fff;
    border-color: var(--accent);
}
.news-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.news-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all var(--transition);
    border: 1px solid var(--border);
}
.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.nc-cover {
    position: relative; height: 180px;
    background: var(--bg-section); overflow: hidden;
}
.nc-cover img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.5s ease;
}
.news-card:hover .nc-cover img { transform: scale(1.05); }
.nc-cover-placeholder {
    width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg-section);
}
.nc-type {
    position: absolute; top: 12px; left: 12px;
    padding: 4px 12px; border-radius: 4px;
    font-size: 12px; font-weight: 500;
}
.nc-type.company { background: rgba(0,180,216,0.9); color: #fff; }
.nc-type.industry { background: rgba(168,85,247,0.9); color: #fff; }
.nc-body { padding: 20px; }
.nc-title {
    font-size: 16px; font-weight: 600; color: var(--text-dark);
    line-height: 1.5; margin-bottom: 8px;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
}
.nc-summary {
    font-size: 13px; color: var(--text-muted); line-height: 1.6;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
    margin-bottom: 12px;
}
.nc-footer {
    display: flex; justify-content: space-between;
    font-size: 12px; color: var(--text-light);
}
.news-more {
    text-align: center; margin-top: 36px;
}
.news-more .btn-outline {
    border-color: var(--accent); color: var(--accent);
}
.news-more .btn-outline:hover {
    background: var(--accent); color: #fff;
}

/* --- Page Banner (新闻/详情页) --- */
.page-banner {
    position: relative;
    background: linear-gradient(135deg, #0a1628, #0f2b46, #132f50);
    padding: 140px 24px 60px;
    text-align: center;
    overflow: hidden;
}
.page-banner-sm { padding: 120px 24px 50px; }
.page-banner-bg {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(0,180,216,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,180,216,0.04) 1px, transparent 1px);
    background-size: 50px 50px;
}
.page-banner-content { position: relative; z-index: 1; }
.page-banner h1 {
    font-size: 36px; font-weight: 700; color: #fff;
    margin-bottom: 10px;
}
.page-banner p {
    font-size: 16px; color: rgba(255,255,255,0.55);
}
.breadcrumb {
    display: flex; align-items: center; gap: 8px;
    justify-content: center; margin-top: 16px;
    font-size: 14px;
}
.breadcrumb a { color: rgba(255,255,255,0.5); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: rgba(255,255,255,0.3); }

/* --- News List Page --- */
.news-list-section {
    padding: 60px 0 80px;
    background: var(--bg-white);
}
.news-list-grid {
    display: flex; flex-direction: column; gap: 20px;
}
.news-card-lg {
    display: grid; grid-template-columns: 260px 1fr;
    gap: 24px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all var(--transition);
    padding: 0;
}
.news-card-lg:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--accent);
}
.ncl-cover {
    height: 180px; background: var(--bg-section);
    overflow: hidden;
}
.ncl-cover img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.5s ease;
}
.news-card-lg:hover .ncl-cover img { transform: scale(1.05); }
.ncl-body {
    padding: 20px 24px 20px 0;
    display: flex; flex-direction: column; justify-content: center;
}
.ncl-meta {
    display: flex; gap: 16px; margin-bottom: 10px;
    font-size: 13px; color: var(--text-muted);
}
.ncl-body h3 {
    font-size: 18px; font-weight: 600; color: var(--text-dark);
    line-height: 1.5; margin-bottom: 8px;
}
.ncl-body p {
    font-size: 14px; color: var(--text-muted); line-height: 1.7;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
    margin-bottom: 12px;
}
.ncl-link {
    font-size: 14px; color: var(--accent); font-weight: 500;
}
.nda-type {
    display: inline-block; padding: 3px 10px; border-radius: 4px;
    font-size: 12px; font-weight: 500;
}
.nda-type.company { background: rgba(0,180,216,0.1); color: #0096b7; }
.nda-type.industry { background: rgba(168,85,247,0.1); color: #7c3aed; }

/* News Pagination */
.news-pagination {
    display: flex; align-items: center; justify-content: center;
    gap: 6px; margin-top: 40px;
}
.page-btn {
    padding: 8px 14px; border: 1px solid var(--border);
    border-radius: var(--radius-sm); background: #fff;
    font-size: 14px; cursor: pointer; transition: all var(--transition);
    font-family: var(--font);
}
.page-btn:hover { border-color: var(--accent); color: var(--accent); }
.page-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* --- News Detail Page --- */
.news-detail-section {
    padding: 60px 0 80px;
    background: var(--bg-white);
}
.news-detail-article {
    max-width: 800px; margin: 0 auto;
}
.nda-loading {
    text-align: center; padding: 60px 0;
    color: var(--text-muted); font-size: 15px;
}
.nda-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}
.nda-title {
    font-size: 28px; font-weight: 700; color: var(--text-dark);
    line-height: 1.4; margin-bottom: 16px;
}
.nda-meta {
    display: flex; gap: 16px; font-size: 14px; color: var(--text-muted);
    align-items: center;
}
.nda-cover {
    margin-bottom: 32px; border-radius: var(--radius);
    overflow: hidden;
}
.nda-cover img {
    width: 100%; display: block;
}
.nda-content {
    font-size: 16px; line-height: 1.9; color: var(--text-body);
}
.nda-content p { margin-bottom: 16px; }
.nda-content h2 { font-size: 22px; font-weight: 600; color: var(--text-dark); margin: 28px 0 16px; }
.nda-content h3 { font-size: 18px; font-weight: 600; color: var(--text-dark); margin: 24px 0 12px; }
.nda-content img { max-width: 100%; border-radius: var(--radius-sm); margin: 16px 0; }
.nda-content a { color: var(--accent); }
.nda-content ul, .nda-content ol { padding-left: 24px; margin-bottom: 16px; }
.nda-content li { margin-bottom: 6px; }
.nda-content blockquote {
    border-left: 4px solid var(--accent);
    padding: 12px 20px; margin: 16px 0;
    background: var(--accent-glow); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-muted); font-style: italic;
}
.news-detail-nav {
    max-width: 800px; margin: 40px auto 0;
    padding-top: 24px; border-top: 1px solid var(--border);
}

/* --- Back to Top --- */
.back-top {
    position: fixed; bottom: 30px; right: 30px;
    width: 48px; height: 48px;
    background: var(--accent); color: #fff;
    border: none; border-radius: 50%;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 20px rgba(0,180,216,0.3);
    opacity: 0; transform: translateY(20px);
    transition: all var(--transition);
    z-index: 999;
}
.back-top.visible { opacity: 1; transform: translateY(0); }
.back-top:hover { background: var(--accent-dark); transform: translateY(-3px); }
.back-top svg { width: 20px; height: 20px; }

/* --- Animations --- */
.fade-up {
    opacity: 0; transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .services-grid { grid-template-columns: repeat(3, 1fr); }
    .service-detail-card { grid-template-columns: 1fr; gap: 20px; }
    .sdc-number { font-size: 36px; min-width: auto; }
    .sdc-scenarios { flex-direction: row; flex-wrap: wrap; align-self: flex-start; }
    .process-steps { flex-wrap: wrap; gap: 24px; }
    .process-step { flex: 0 0 calc(33.333% - 16px); }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-cta { display: none; }
    .nav-toggle { display: flex; }
    .nav-links.open {
        display: flex; flex-direction: column;
        position: absolute; top: 72px; left: 0; right: 0;
        background: rgba(255,255,255,0.98);
        padding: 16px 24px; gap: 4px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
    }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .about-layout { grid-template-columns: 1fr; gap: 40px; }
    .contact-layout { grid-template-columns: 1fr; gap: 40px; }
    .footer-top { flex-direction: column; gap: 32px; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
    .hero-stats { gap: 24px; }
    .process-step { flex: 0 0 calc(50% - 12px); }
    .sdc-features { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .news-card-lg { grid-template-columns: 1fr; }
    .ncl-cover { height: 200px; }
    .ncl-body { padding: 20px; }
    .nda-title { font-size: 22px; }
}

@media (max-width: 480px) {
    .services-grid { grid-template-columns: 1fr; }
    .hero { padding: 100px 16px 60px; }
    .hero-actions { flex-direction: column; align-items: center; }
    .btn { width: 100%; }
    .process-step { flex: 0 0 100%; }
    .service-detail-card { padding: 24px; }
    .contact-form-wrap { padding: 24px; }
    .about-float-card { position: relative; bottom: auto; right: auto; display: inline-block; margin-top: 16px; }
    .page-banner h1 { font-size: 26px; }
}