/*
 * 深圳市毅荣塑胶五金有限公司 官网主样式表
 * 设计主题：「精密制造」现代工业风
 * 关键词：CAD线框、精密网格、爆炸图动画、工具栏式导航
 */

/* ====================================
 * 1. Design Tokens
 * ==================================== */
:root {
    --color-primary: #1E40AF; /* 机械蓝 */
    --color-primary-dark: #0B1F4B;
    --color-secondary: #0F172A; /* 工业深蓝 */
    --color-accent: #FBBF24; /* 塑胶黄 */
    --color-accent-soft: #FCD34D;
    --color-surface: #FFFFFF;
    --color-surface-alt: #F3F4F6;
    --color-line: rgba(14, 28, 68, 0.12);
    --color-text: #1F2937;
    --color-text-muted: #6B7280;
    --color-success: #10B981;

    --font-family-main: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    --font-size-base: 16px;
    --font-size-h1: clamp(2rem, 4vw, 3rem);
    --font-size-h2: clamp(1.5rem, 3vw, 2.25rem);
    --font-size-h3: 1.5rem;

    --spacing-2: 8px;
    --spacing-3: 12px;
    --spacing-4: 16px;
    --spacing-6: 24px;
    --spacing-8: 32px;
    --spacing-10: 40px;
    --spacing-12: 48px;
    --spacing-16: 64px;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.08);
    --shadow-bold: 0 25px 60px rgba(15, 23, 42, 0.18);

    --transition-fast: 0.2s ease;
    --transition-medium: 0.35s ease;
}

/* ====================================
 * 2. Base Styles
 * ==================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family-main);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text);
    background:
        linear-gradient(135deg, rgba(30, 64, 175, 0.05), rgba(15, 23, 42, 0.08)),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 32px,
            rgba(30, 64, 175, 0.03) 32px,
            rgba(30, 64, 175, 0.03) 33px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 32px,
            rgba(30, 64, 175, 0.03) 32px,
            rgba(30, 64, 175, 0.03) 33px
        ),
        #F9FAFB;
    min-height: 100vh;
}

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

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

a:hover {
    color: var(--color-accent);
}

.container {
    width: min(1200px, 90%);
    margin: 0 auto;
}

section {
    padding: var(--spacing-16) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-10);
}

.section-header h2 {
    font-size: var(--font-size-h2);
    color: var(--color-secondary);
}

.section-header p {
    color: var(--color-text-muted);
    max-width: 640px;
    margin: var(--spacing-3) auto 0;
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(30, 64, 175, 0.1);
    color: var(--color-primary);
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-medium);
}

.btn-primary {
    background: linear-gradient(135deg, #1E40AF, #273C91);
    color: #fff;
    box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-bold);
}

.btn-secondary {
    border-color: rgba(30, 64, 175, 0.3);
    color: var(--color-primary);
    background: rgba(255, 255, 255, 0.9);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    background: #fff;
}

/* ====================================
 * 3. Navigation (工具栏风格)
 * ==================================== */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.92);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) 0;
    gap: var(--spacing-4);
}

.logo {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: #fff;
    white-space: nowrap;
}

.nav-menu {
    list-style: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    flex: 1;
    justify-content: flex-end;
    flex-wrap: nowrap;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    padding: 10px 16px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
    border: 1px solid transparent;
    background: rgba(255, 255, 255, 0.04);
}

.nav-link:hover,
.nav-link.active {
    border-color: rgba(251, 191, 36, 0.6);
    color: #fff;
}

.dropdown-menu {
    position: absolute;
    top: 110%;
    left: 0;
    background: #fff;
    border-radius: var(--radius-md);
    padding: var(--spacing-4);
    min-width: 220px;
    box-shadow: var(--shadow-bold);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-medium);
}

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

.dropdown-item {
    list-style: none;
}

.dropdown-item + .dropdown-item {
    margin-top: var(--spacing-3);
}

.dropdown-item a {
    display: block;
    color: var(--color-secondary);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    border-left: 3px solid transparent;
}

.dropdown-item a:hover {
    background: var(--color-surface-alt);
    border-left-color: var(--color-primary);
    color: var(--color-primary);
}

.nav-cta {
    margin-left: var(--spacing-4);
}

/* ====================================
 * 4. Hero & Banners
 * ==================================== */
.hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    background: radial-gradient(circle at top, rgba(30, 64, 175, 0.35), transparent 60%),
        url('../images/03_modern_office.png') center/cover;
    overflow: hidden;
    color: #fff;
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(15, 23, 42, 0.85), rgba(15, 23, 42, 0.55));
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 620px;
}

.hero h1 {
    font-size: var(--font-size-h1);
    margin-bottom: var(--spacing-4);
}

.hero p {
    color: rgba(255, 255, 255, 0.86);
    margin-bottom: var(--spacing-6);
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: var(--spacing-6);
}

.hero-tags span {
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 999px;
    padding: 6px 16px;
    font-size: 0.9rem;
}

.page-hero {
    padding: var(--spacing-12) 0;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.15), rgba(15, 23, 42, 0.8)),
        url('../images/factory_production_line_13.png') center/cover;
    color: #fff;
    position: relative;
}

.page-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(15, 23, 42, 0.85), rgba(15, 23, 42, 0.35));
}

.page-hero .container {
    position: relative;
    z-index: 1;
}

.page-hero h1 {
    color: #fff;
    font-size: var(--font-size-h2);
}

.breadcrumb {
    margin-top: var(--spacing-4);
    color: rgba(255, 255, 255, 0.8);
}

.subnav-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-3);
    margin-top: var(--spacing-4);
}

.chip {
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 999px;
    padding: 6px 16px;
    font-size: 0.9rem;
    color: #fff;
}

/* ====================================
 * 5. Layout Utilities
 * ==================================== */
.grid {
    display: grid;
    gap: var(--spacing-6);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: var(--spacing-4);
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-6);
    flex-wrap: wrap;
}

/* ====================================
 * 6. Cards & Special Effects
 * ==================================== */
.cad-card {
    position: relative;
    background: rgba(255, 255, 255, 0.96);
    border-radius: var(--radius-md);
    padding: var(--spacing-6);
    border: 1px solid var(--color-line);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.cad-card::before {
    content: '';
    position: absolute;
    inset: 10px;
    border: 1px dashed rgba(30, 64, 175, 0.35);
    border-radius: calc(var(--radius-md) - 6px);
}

.cad-card > * {
    position: relative;
    z-index: 1;
}

.cad-card img {
    width: 100%;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-3);
    height: 140px;
    object-fit: cover;
}

.metric {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.metric-label {
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-size: 0.8rem;
}

.exploded-view {
    position: relative;
    min-height: 240px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.1), rgba(14, 23, 42, 0.25));
    overflow: hidden;
}

.exploded-view img {
    width: 70%;
    margin: 0 auto;
    padding-top: var(--spacing-6);
    animation: explodeParts 6s ease-in-out infinite;
}

.exploded-view::after {
    content: '';
    position: absolute;
    top: 30px;
    right: 30px;
    width: 120px;
    height: 120px;
    border: 1px solid rgba(251, 191, 36, 0.4);
    border-radius: 50%;
    filter: blur(0.5px);
}

@keyframes explodeParts {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.precision-grid {
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-line);
    background-image:
        linear-gradient(0deg, rgba(30, 64, 175, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(30, 64, 175, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    padding: var(--spacing-6);
}

.process-flow {
    counter-reset: step;
    display: grid;
    gap: var(--spacing-4);
}

.process-step {
    position: relative;
    padding-left: 52px;
}

.process-step::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    position: absolute;
    left: 0;
    top: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(30, 64, 175, 0.1);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.process-step::after {
    content: '';
    position: absolute;
    left: 17px;
    top: 42px;
    width: 2px;
    height: calc(100% - 42px);
    background: rgba(30, 64, 175, 0.15);
}

.process-step:last-child::after {
    display: none;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-4);
}

.stat-item {
    background: rgba(30, 64, 175, 0.08);
    border-radius: var(--radius-md);
    padding: var(--spacing-4);
}

.case-card,
.news-card,
.capability-card {
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    background: #fff;
    box-shadow: var(--shadow-soft);
    padding: var(--spacing-4);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.case-card img,
.news-card img,
.capability-card img {
    border-radius: var(--radius-sm);
}

.case-meta,
.news-meta {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.quote-panel {
    background: linear-gradient(120deg, #1E40AF, #111836);
    color: #fff;
    padding: var(--spacing-6);
    border-radius: var(--radius-lg);
}

.floating-quote {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 999;
    box-shadow: var(--shadow-bold);
}

.legal-text h2 {
    margin-top: var(--spacing-6);
    color: var(--color-secondary);
}

.legal-text p,
.legal-text li {
    line-height: 1.8;
    color: var(--color-text);
}

/* ====================================
 * 7. Tables & Timeline
 * ==================================== */
.table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-line);
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

thead {
    background: var(--color-primary);
    color: #fff;
}

td,
th {
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-line);
    text-align: left;
}

.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 16px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: rgba(30, 64, 175, 0.2);
}

.timeline-item {
    margin-bottom: var(--spacing-8);
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -27px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 3px solid #fff;
    box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.2);
}

/* ====================================
 * 8. Forms & Contact
 * ==================================== */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-4);
}

input, textarea, select {
    width: 100%;
    padding: 14px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(14, 23, 42, 0.15);
    background: rgba(255, 255, 255, 0.95);
    font-size: 1rem;
}

textarea {
    min-height: 140px;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.15);
}

.contact-card {
    background: linear-gradient(135deg, #1E40AF, #152E6B);
    color: #fff;
    padding: var(--spacing-8);
    border-radius: var(--radius-lg);
}

.contact-card a {
    color: #fff;
    font-weight: 600;
}

/* ====================================
 * 9. Footer
 * ==================================== */
.footer {
    background: #0b1224;
    color: rgba(255, 255, 255, 0.7);
    padding: var(--spacing-12) 0;
}

.footer-grid {
    display: grid;
    gap: var(--spacing-6);
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.footer h4 {
    color: #fff;
    margin-bottom: var(--spacing-4);
}

.footer-links a {
    display: block;
    margin-bottom: 10px;
}

.footer-bottom {
    margin-top: var(--spacing-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-4);
    text-align: center;
}

/* ====================================
 * 10. Responsive
 * ==================================== */
@media (max-width: 980px) {
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
    .nav-cta {
        width: 100%;
        justify-content: center;
        margin-top: var(--spacing-3);
    }
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: var(--spacing-4);
    }
    section {
        padding: var(--spacing-12) 0;
    }
    .hero {
        min-height: auto;
        padding: var(--spacing-12) 0;
    }
}

@media (max-width: 520px) {
    .nav-link {
        padding: 8px 12px;
        font-size: 0.9rem;
    }
    .hero-tags {
        flex-direction: column;
        align-items: flex-start;
    }
}