/* ============================================
   东孚石化 - 企业官网设计系统 v2.0
   Design System: Modern Enterprise / Premium Business
   Color: Tech Blue + Black + White
   ============================================ */

/* === RESET & BASE === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 - 科技蓝 */
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #60A5FA;
    --primary-soft: #DBEAFE;
    --primary-bg: #EFF6FF;

    /* 深色系 */
    --dark: #1A1A1A;
    --dark-2: #242424;
    --gray-900: #2D2D2D;
    --gray-800: #3A3A3A;
    --gray-700: #4A4A4A;
    --gray-600: #6B6B6B;
    --gray-500: #888888;
    --gray-400: #A8A8A8;
    --gray-300: #D0D0D0;
    --gray-200: #E5E5E5;
    --gray-100: #F2F2F3;
    --gray-50: #F8F8F9;
    --white: #FFFFFF;

    /* 语义色 */
    --success: #2E9E5B;
    --danger: #D94545;

    /* 阴影 */
    --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, 0.10);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.14);
    --shadow-blue: 0 4px 20px rgba(37, 99, 235, 0.25);

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 999px;

    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* 布局 */
    --container: 1280px;
    --container-narrow: 960px;
    --nav-height: 72px;

    /* 字体 */
    --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", "Noto Sans SC", "Source Han Sans SC", Arial, sans-serif;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--gray-800);
    background: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    display: block;
}

ul, ol {
    list-style: none;
}

/* === CONTAINER === */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 40px;
}

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 40px;
}

/* === TYPOGRAPHY === */
.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-tag::before {
    content: "";
    width: 24px;
    height: 2px;
    background: var(--primary);
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--dark);
    line-height: 1.3;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 1.0625rem;
    color: var(--gray-600);
    line-height: 1.8;
    max-width: 640px;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-header .section-subtitle {
    margin: 0 auto;
}

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

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(37, 99, 235, 0.4);
}

.btn-dark {
    background: var(--dark);
    color: var(--white);
}

.btn-dark:hover {
    background: var(--dark-2);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--dark);
    border: 2px solid var(--gray-200);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-bg);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(8px);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-lg {
    padding: 16px 40px;
    font-size: 1rem;
}

.btn-sm {
    padding: 10px 24px;
    font-size: 0.875rem;
}

/* === NAVIGATION === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--gray-200);
}

.navbar .container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--dark);
}

.nav-logo img {
    height: 44px;
    width: auto;
    display: block;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-menu a {
    padding: 8px 16px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-700);
    border-radius: var(--radius-sm);
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary);
}

.nav-menu a.active {
    color: var(--primary);
    font-weight: 600;
}

.nav-menu a.active::after {
    content: "";
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-actions .btn {
    padding: 10px 24px;
    font-size: 0.875rem;
}

.nav-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--gray-700);
    font-weight: 600;
}

.nav-phone .phone-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1rem;
}

/* Mobile menu toggle */
.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* === HERO === */
.hero {
    position: relative;
    min-height: 680px;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    background: linear-gradient(135deg, #0F0F0F 0%, #1A1A1A 50%, #242424 100%);
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 80% 20%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 20% 80%, rgba(37, 99, 235, 0.08) 0%, transparent 50%);
}

.hero::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 680px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    background: rgba(37, 99, 235, 0.15);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: var(--radius-full);
    color: var(--primary-light);
    font-size: 0.8125rem;
    font-weight: 500;
    margin-bottom: 28px;
}

.hero-badge .dot {
    width: 6px;
    height: 6px;
    background: var(--primary-light);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
    letter-spacing: -1px;
    margin-bottom: 24px;
}

.hero h1 .accent {
    color: var(--primary-light);
}

.hero-desc {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 560px;
}

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

.hero-stats {
    display: flex;
    gap: 48px;
    margin-top: 56px;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat .num {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-light);
    line-height: 1;
}

.hero-stat .num .suffix {
    font-size: 1.25rem;
    font-weight: 600;
}

.hero-stat .label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 8px;
}

/* Hero visual element */
.hero-visual {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 500px;
    height: 500px;
    z-index: 1;
    opacity: 0.6;
}

.hero-visual-ring {
    position: absolute;
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.hero-visual-ring:nth-child(1) { width: 500px; height: 500px; }
.hero-visual-ring:nth-child(2) { width: 380px; height: 380px; border-color: rgba(37, 99, 235, 0.15); }
.hero-visual-ring:nth-child(3) { width: 260px; height: 260px; border-color: rgba(37, 99, 235, 0.1); }

/* === SECTIONS === */
.section {
    padding: 100px 0;
}

.section-gray {
    background: var(--gray-50);
}

.section-dark {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.8);
}

.section-dark .section-title {
    color: var(--white);
}

.section-dark .section-subtitle {
    color: rgba(255, 255, 255, 0.6);
}

/* === ABOUT BRIEF === */
.about-brief {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-brief-text h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 24px;
    line-height: 1.3;
}

.about-brief-text p {
    font-size: 1rem;
    color: var(--gray-600);
    line-height: 1.9;
    margin-bottom: 20px;
}

.about-brief-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9375rem;
    color: var(--gray-700);
    font-weight: 500;
}

.about-feature .check {
    width: 24px;
    height: 24px;
    background: var(--primary-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 0.75rem;
    flex-shrink: 0;
}

.about-brief-visual {
    position: relative;
}

.about-visual-card {
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
    border-radius: var(--radius-xl);
    padding: 48px;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.about-visual-card::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 50%);
}

.about-visual-card .year {
    font-size: 4rem;
    font-weight: 800;
    color: var(--primary-light);
    line-height: 1;
    position: relative;
}

.about-visual-card .year-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 8px;
    position: relative;
}

.about-visual-card .divider {
    width: 40px;
    height: 2px;
    background: var(--primary);
    margin: 24px 0;
    position: relative;
}

.about-visual-card .desc {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    position: relative;
}

.about-mini-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 32px;
    position: relative;
}

.about-mini-stat {
    border-left: 2px solid var(--primary);
    padding-left: 16px;
}

.about-mini-stat .num {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--white);
}

.about-mini-stat .label {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.5);
}

/* === ADVANTAGES === */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.advantage-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.advantage-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-soft);
}

.advantage-card:hover::before {
    transform: scaleX(1);
}

.advantage-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 24px;
    color: var(--primary);
    transition: var(--transition);
}

.advantage-card:hover .advantage-icon {
    background: var(--primary);
    color: var(--white);
}

.advantage-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 0.875rem;
    color: var(--gray-600);
    line-height: 1.8;
}

/* === PRODUCTS === */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-card-visual {
    height: 200px;
    position: relative;
    overflow: hidden;
    background-size: cover;
    background-position: center;
    transition: var(--transition);
}

.product-card:hover .product-card-visual {
    transform: scale(1.03);
}

.product-card-visual.bg-1 { background: linear-gradient(135deg, #1A1A1A, #2D2D2D); }
.product-card-visual.bg-2 { background: linear-gradient(135deg, #2D2D2D, #3A3A3A); }
.product-card-visual.bg-3 { background: linear-gradient(135deg, #3A3A3A, #4A4A4A); }
.product-card-visual.bg-4 { background: linear-gradient(135deg, #1A1A1A, #3A3A3A); }
.product-card-visual.bg-5 { background: linear-gradient(135deg, #242424, #3A3A3A); }
.product-card-visual.bg-6 { background: linear-gradient(135deg, #1A1A1A, #2D2D2D); }

.product-card-visual::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60%;
    background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
    z-index: 1;
}

.product-card-visual .tag {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 4px 12px;
    background: rgba(37, 99, 235, 0.9);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    z-index: 2;
}

.product-card-body {
    padding: 28px;
}

.product-card-body h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.product-card-body .en-name {
    font-size: 0.75rem;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.product-card-body p {
    font-size: 0.875rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
}

.product-card-link:hover {
    gap: 10px;
}

/* === CASES === */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.case-card {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.7);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.5s ease;
}

.case-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 28px 60px rgba(37, 99, 235, 0.2), 0 10px 28px rgba(0, 0, 0, 0.07);
    border-color: rgba(37, 99, 235, 0.4);
}

.case-card-visual {
    height: 120px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-soft) 0%, #E8F0FF 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-card-visual .case-icon {
    font-size: 2.5rem;
    opacity: 0.85;
    position: relative;
    z-index: 2;
    transition: transform 0.55s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.45s ease;
}

.case-card:hover .case-card-visual .case-icon {
    transform: scale(1.15) translateY(-4px);
    opacity: 1;
}

.case-card-visual .overlay {
    position: absolute;
    inset: 0;
    background: transparent;
    display: flex;
    align-items: flex-end;
    padding: 16px;
    transition: background 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-card:hover .case-card-visual .overlay {
    background: linear-gradient(180deg, transparent 60%, rgba(37,99,235,0.08) 100%);
}

.case-card-visual .overlay .case-category {
    color: var(--primary);
    background: rgba(255, 255, 255, 0.9);
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    z-index: 3;
}

.case-card-body {
    padding: 28px;
}

.case-card-body h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.case-card-body p {
    font-size: 0.875rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 16px;
}

.case-card-meta {
    display: flex;
    gap: 16px;
    font-size: 0.8125rem;
    color: var(--gray-500);
}

.case-card-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* === NEWS === */
.news-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 28px;
}

.news-featured {
    grid-row: span 2;
}

.news-card {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.7);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.5s ease;
}

.news-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 28px 60px rgba(37, 99, 235, 0.2), 0 10px 28px rgba(0, 0, 0, 0.07);
    border-color: rgba(37, 99, 235, 0.4);
}

.news-card-visual {
    height: 110px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--primary-soft) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.news-featured .news-card-visual {
    height: 150px;
}

.news-card-visual .news-icon {
    font-size: 2.25rem;
    opacity: 0.7;
    transition: transform 0.55s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.45s ease;
}

.news-card:hover .news-card-visual .news-icon {
    transform: scale(1.18);
    opacity: 0.9;
}

.news-card-visual .news-date {
    position: absolute;
    bottom: 12px;
    left: 12px;
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary);
    padding: 5px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    backdrop-filter: blur(4px);
}

.news-card-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-card-body .news-tag {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.news-card-body h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
    line-height: 1.5;
}

.news-featured .news-card-body h3 {
    font-size: 1.25rem;
}

.news-card-body p {
    font-size: 0.875rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
}

.news-card-link {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* === HOME SECTION BACKGROUNDS === */
.home-cases {
    background:
        radial-gradient(ellipse at 15% 20%, rgba(37, 99, 235, 0.06) 0%, transparent 45%),
        radial-gradient(ellipse at 85% 80%, rgba(96, 165, 250, 0.07) 0%, transparent 45%),
        var(--gray-100);
}

.home-news {
    background:
        radial-gradient(ellipse at 80% 15%, rgba(37, 99, 235, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 20% 85%, rgba(96, 165, 250, 0.06) 0%, transparent 50%),
        var(--white);
}

/* === NEWS LIST === */
.news-list {
    display: flex;
    flex-direction: column;
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.news-list-item {
    display: flex;
    align-items: center;
    gap: 28px;
    padding: 28px 32px;
    border-bottom: 1px solid var(--gray-200);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
}

.news-list-item:last-child {
    border-bottom: none;
}

.news-list-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary);
    transform: scaleY(0);
    transition: var(--transition);
}

.news-list-item:hover {
    background: var(--primary-bg);
}

.news-list-item:hover::before {
    transform: scaleY(1);
}

.news-list-date {
    flex-shrink: 0;
    width: 80px;
    text-align: center;
    border-right: 2px solid var(--gray-200);
    padding-right: 24px;
}

.news-list-day {
    display: block;
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    font-family: var(--font-secondary);
}

.news-list-ym {
    display: block;
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-top: 6px;
    letter-spacing: 1px;
}

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

.news-list-tag {
    display: inline-block;
    font-size: 0.6875rem;
    color: var(--primary);
    font-weight: 600;
    padding: 3px 10px;
    background: var(--primary-soft);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.news-list-info h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 6px;
    line-height: 1.5;
    transition: var(--transition);
}

.news-list-item:hover .news-list-info h3 {
    color: var(--primary);
}

.news-list-info p {
    font-size: 0.8125rem;
    color: var(--gray-600);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-list-arrow {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    color: var(--gray-400);
    background: var(--gray-100);
    border-radius: 50%;
    transition: var(--transition);
}

.news-list-item:hover .news-list-arrow {
    color: var(--white);
    background: var(--primary);
    transform: translateX(4px);
}
.cta-section {
    position: relative;
    padding: 80px 0;
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
    overflow: hidden;
}

.cta-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 70% 50%, rgba(37, 99, 235, 0.12) 0%, transparent 60%);
}

.cta-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
}

.cta-text h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 12px;
}

.cta-text p {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.6);
}

.cta-actions {
    display: flex;
    gap: 16px;
    flex-shrink: 0;
}

/* === FOOTER === */
.footer {
    background: #0A0A0A;
    color: rgba(255, 255, 255, 0.6);
    padding: 64px 0 0;
}

.footer-main {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 48px;
}

.footer-brand .nav-logo {
    margin-bottom: 20px;
}

.footer-brand .nav-logo img {
    height: 40px;
    width: auto;
}

.footer-brand p {
    font-size: 0.875rem;
    line-height: 1.8;
    margin-bottom: 20px;
    max-width: 320px;
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 14px;
    font-size: 0.875rem;
}

.footer-contact-item .icon {
    color: var(--primary);
    font-size: 1rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 20px;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

.footer-qr {
    display: flex;
    gap: 20px;
    margin-top: 16px;
}

.footer-qr-item {
    text-align: center;
}

.footer-qr-item .qr-box {
    width: 100px;
    height: 100px;
    background: var(--white);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 8px;
}

.footer-qr-item .label {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom .links {
    display: flex;
    gap: 24px;
}

.footer-bottom .links a:hover {
    color: var(--primary-light);
}

/* === PAGE BANNER === */
.page-banner {
    padding: calc(var(--nav-height) + 80px) 0 64px;
    background: linear-gradient(135deg, #0F0F0F 0%, #1A1A1A 50%, #242424 100%);
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 80% 30%, rgba(37, 99, 235, 0.12) 0%, transparent 60%);
}

.page-banner::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
}

.page-banner .container {
    position: relative;
    z-index: 2;
}

.page-banner h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 12px;
}

.page-banner .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

.page-banner .breadcrumb a:hover {
    color: var(--primary-light);
}

.page-banner .breadcrumb .separator {
    color: rgba(255, 255, 255, 0.3);
}

.page-banner .breadcrumb .current {
    color: var(--primary-light);
}

/* === TIMELINE === */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 120px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gray-200);
}

.timeline-item {
    display: flex;
    gap: 40px;
    padding-bottom: 48px;
    position: relative;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-year {
    width: 100px;
    text-align: right;
    flex-shrink: 0;
}

.timeline-year .year {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
}

.timeline-dot {
    position: absolute;
    left: 113px;
    top: 6px;
    width: 16px;
    height: 16px;
    background: var(--white);
    border: 3px solid var(--primary);
    border-radius: 50%;
    z-index: 2;
}

.timeline-content {
    flex: 1;
    padding-left: 32px;
}

.timeline-content h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.8;
}

/* === CONTACT INFO === */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-info-list {
    display: grid;
    gap: 24px;
}

.contact-info-item {
    display: flex;
    gap: 20px;
    padding: 28px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.contact-info-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-soft);
}

.contact-info-item .icon {
    width: 52px;
    height: 52px;
    background: var(--primary-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--primary);
    flex-shrink: 0;
}

.contact-info-item .label {
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-bottom: 4px;
}

.contact-info-item .value {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--dark);
}

.contact-info-item .sub {
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-top: 4px;
}

/* === FORM === */
.form-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.form-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.form-card .form-desc {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.form-label .required {
    color: var(--danger);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    color: var(--dark);
    background: var(--white);
    transition: var(--transition);
    font-family: var(--font-sans);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-submit {
    width: 100%;
    margin-top: 8px;
}

/* === PRODUCT DETAIL LIST === */
.product-detail-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.product-detail-item {
    display: flex;
    gap: 24px;
    padding: 32px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.product-detail-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    border-color: var(--primary-soft);
}

.product-detail-item .pdi-image {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-md);
    overflow: hidden;
    flex-shrink: 0;
    position: relative;
}

.product-detail-item .pdi-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-detail-item:hover .pdi-image img {
    transform: scale(1.08);
}

.product-detail-item .pdi-content h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 6px;
}

.product-detail-item .pdi-content .pdi-sub {
    font-size: 0.75rem;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.product-detail-item .pdi-content p {
    font-size: 0.875rem;
    color: var(--gray-600);
    line-height: 1.7;
}

.product-detail-item .pdi-content .pdi-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.product-detail-item .pdi-features span {
    padding: 3px 10px;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--gray-600);
}

/* === STATS COUNTER === */
.stats-band {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    padding: 56px 0;
}

.stat-item {
    text-align: center;
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -16px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
}

.stat-item .num {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-light);
    line-height: 1;
}

.stat-item .num .suffix {
    font-size: 1.5rem;
}

.stat-item .label {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 12px;
}

/* === VALUES === */
.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.value-card {
    text-align: center;
    padding: 48px 32px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.value-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.value-card .icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: var(--primary-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary);
}

.value-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.value-card p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.8;
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .container, .container-narrow {
        padding: 0 32px;
    }

    .hero h1 {
        font-size: 2.75rem;
    }

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

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

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

    .news-grid {
        grid-template-columns: 1fr 1fr;
    }

    .news-featured {
        grid-column: span 2;
        grid-row: span 1;
    }

    .news-featured .news-card-visual {
        height: 130px;
    }

    .news-list-item {
        padding: 24px 20px;
        gap: 20px;
    }

    .news-list-day {
        font-size: 1.875rem;
    }

    .footer-main {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }

    .about-brief {
        gap: 40px;
    }

    .hero-visual {
        display: none;
    }

    .stats-band {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

    .stat-item:nth-child(2)::after {
        display: none;
    }

    .values-grid {
        grid-template-columns: 1fr;
    }

    .product-detail-list {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .cta-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .container, .container-narrow {
        padding: 0 20px;
    }

    /* Mobile nav */
    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 16px 20px;
        gap: 4px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        max-height: calc(100vh - var(--nav-height));
        overflow-y: auto;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-menu a {
        width: 100%;
        padding: 14px 16px;
        border-bottom: 1px solid var(--gray-100);
    }

    .nav-menu a.active::after {
        display: none;
    }

    .nav-actions {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-logo img {
        height: 36px;
    }

    /* Hero */
    .hero {
        min-height: 560px;
        text-align: left;
    }

    .hero h1 {
        font-size: 2rem;
        line-height: 1.3;
    }

    .hero-desc {
        font-size: 1rem;
    }

    .hero-stats {
        gap: 24px;
        flex-wrap: wrap;
    }

    .hero-stat .num {
        font-size: 1.75rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }

    /* Sections */
    .section {
        padding: 64px 0;
    }

    .section-title {
        font-size: 1.625rem;
    }

    .section-header {
        margin-bottom: 40px;
    }

    /* About */
    .about-brief {
        grid-template-columns: 1fr;
    }

    .about-brief-features {
        grid-template-columns: 1fr;
    }

    /* Grids */
    .advantages-grid,
    .products-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }

    .news-grid {
        grid-template-columns: 1fr;
    }

    .news-featured {
        grid-column: span 1;
    }

    .news-list-item {
        padding: 20px 16px;
        gap: 16px;
    }

    .news-list-date {
        width: 56px;
        padding-right: 14px;
    }

    .news-list-day {
        font-size: 1.5rem;
    }

    .news-list-ym {
        font-size: 0.75rem;
    }

    .news-list-info h3 {
        font-size: 0.9375rem;
    }

    .news-list-info p {
        -webkit-line-clamp: 1;
    }

    .news-list-arrow {
        display: none;
    }

    /* Stats */
    .stats-band {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .stat-item::after {
        display: none !important;
    }

    .stat-item .num {
        font-size: 2.25rem;
    }

    /* CTA */
    .cta-content {
        flex-direction: column;
        text-align: center;
    }

    .cta-actions {
        width: 100%;
        flex-direction: column;
    }

    /* Footer */
    .footer-main {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .footer-bottom .links {
        flex-wrap: wrap;
        justify-content: center;
    }

    /* Page banner */
    .page-banner {
        padding: calc(var(--nav-height) + 48px) 0 40px;
    }

    .page-banner h1 {
        font-size: 1.875rem;
    }

    /* Timeline */
    .timeline::before {
        left: 8px;
    }

    .timeline-item {
        flex-direction: column;
        gap: 8px;
    }

    .timeline-year {
        width: auto;
        text-align: left;
    }

    .timeline-dot {
        left: 1px;
    }

    .timeline-content {
        padding-left: 32px;
    }

    /* Form */
    .form-row {
        grid-template-columns: 1fr;
    }

    .form-card {
        padding: 24px;
    }

    /* Contact */
    .contact-info-item {
        padding: 20px;
    }

    /* Product detail */
    .product-detail-item {
        flex-direction: column;
        gap: 16px;
        padding: 24px;
    }

    .product-detail-item .pdi-image {
        width: 100%;
        height: 160px;
    }

    /* Values */
    .values-grid {
        grid-template-columns: 1fr;
    }
}

/* === ANIMATIONS === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === UTILITY === */
.text-center { text-align: center; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mb-32 { margin-bottom: 32px; }