/*
  Main Stylesheet for the Company Website
  Version: 4.0 - Final Visual Lock
  Author: Your Top-Tier Software Developer
*/

@font-face {
    font-display: swap;
    font-family: 'Inter';
    font-style: normal;
    font-weight: 100 900;
    src: url('../fonts/Inter-Variable.ttf') format('truetype');
}

html {
    scroll-behavior: smooth;
}

:root {
    --color-primary: #007AFF;
    --color-dark: #1D1D1F;
    --color-light: #fff;
    --color-secondary: #5a6470;
    --color-light-grey: #f8f9fa;
    --color-border: #dee2e6;
    --font-main: 'Inter', sans-serif;
    --container-width: 1120px;
    --section-padding: 6rem 0;
    --header-height: 80px;
}

body {
    font-family: var(--font-main);
    color: var(--color-dark);
    background-color: var(--color-light);
    background-image: url(../images/backgrounds/grid-pattern.svg);
}

.cta-button {
    display: inline-block;
    background-color: var(--color-primary);
    color: var(--color-light);
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: transform .3s ease, box-shadow .3s ease;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 122, 255, .25);
}

/* --- NEW: Global Busy State for CTA Buttons --- */
.cta-button.is-busy {
    background-color: var(--color-secondary);
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
}

.section-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.main-header {
    height: var(--header-height);
    padding: 0 2rem;
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, .85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
}

.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
}

.logo {
    font-weight: 700;
    font-size: 1.5rem;
}

.logo img {
    height: 100px;
    width: auto;
    display: block;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: #343a40;
    font-weight: 500;
    transition: color .3s ease;
}

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

.hero-section {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: calc(100vh - var(--header-height));
    padding: 2rem;
    background-image: url(../images/backgrounds/hero-background-main.jpg);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.hero-content {
    background-color: rgba(0, 0, 0, .45);
    padding: clamp(2rem, 5vw, 3rem);
    border-radius: 12px;
    max-width: 800px;
    color: var(--color-light);
    backdrop-filter: blur(5px);
}

.hero-content h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    line-height: 1.15;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: clamp(1.1rem, 2.5vw, 1.25rem);
    color: rgba(255, 255, 255, .9);
    margin-bottom: 2.5rem;
}

.hero-buttons-container {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.cta-button-secondary {
    display: inline-block;
    background-color: rgba(255, 255, 255, .1);
    color: var(--color-light);
    padding: 10px 24px;
    border-radius: 8px;
    border: 2px solid rgba(255, 255, 255, .8);
    font-weight: 700;
    transition: background-color .3s ease, color .3s ease;
    backdrop-filter: blur(5px);
}

.cta-button-secondary:hover {
    background-color: var(--color-light);
    color: var(--color-dark);
}

.content-section,
.showcase-section,
.contact-section,
.trust-section,
.process-section,
.industries-section {
    padding: var(--section-padding);
}

.content-section h2,
.showcase-section h2,
.contact-section h2,
.trust-section h2,
.process-section h2,
.industries-section h2 {
    font-size: clamp(2.2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 4rem;
    text-align: center;
}

/* ★ ADD THIS NEW RULE BELOW IT ★ */
/* The new Single Source of Truth for all page-specific section titles */
.section-title {
    font-size: clamp(2.2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 4rem;
    text-align: center;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-item {
    position: relative;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    /* background-image: url(../images/backgrounds/service-card-bg.jpg); */
    background-size: 100%;
    background-position: center;
    padding: 0;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-size 0.4s ease-out;
}

.service-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, .1);
    background-size: 110%;
}

.service-item-content {
    width: 100%;
    height: 100%;
    padding: 2.5rem;
    background-color: var(--color-light);
}

.service-icon-img {
    width: 48px;
    height: 48px;
    margin-bottom: 1.5rem;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.service-item:hover .service-icon-img {
    transform: scale(1.15);
}

.service-item h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: .75rem;
}

.service-item p {
    color: var(--color-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.learn-more {
    color: var(--color-primary);
    font-weight: 700;
    transition: transform .3s ease;
    display: inline-block;
}

.service-item:hover .learn-more {
    transform: translateX(8px);
}

.showcase-section {
    background-color: var(--color-light);
    /* MODIFIED */
}

.showcase-item {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
    text-align: left;
    margin-bottom: 5rem;
}

.showcase-item:last-child {
    margin-bottom: 0;
}

.showcase-image {
    width: 100%;
    max-height: 450px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .1);
}

.showcase-content h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.showcase-content p {
    color: var(--color-secondary);
    line-height: 1.6;
}

.showcase-content p:last-of-type {
    color: var(--color-dark);
    margin-top: 1.5rem;
}

.showcase-footer {
    text-align: center;
    margin-top: 5rem;
}

.showcase-footer .cta-button-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.showcase-footer .cta-button-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-light);
}

.why-us-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    text-align: left;
}

.why-us-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.why-us-icon-img {
    width: 40px;
    height: 40px;
    margin-bottom: 1.5rem;
}

.why-us-item h3 {
    font-size: 1.5rem;
    margin-bottom: .75rem;
}

.why-us-item p {
    color: var(--color-secondary);
    line-height: 1.6;
}

.trust-section {
    background-color: var(--color-dark);
}

.trust-section h2 {
    color: var(--color-light);
}

.trust-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 4rem;
}

/* 请找到并替换这条规则 */
.trust-logos img {
    height: 45px;
    /* 从 35px 增加到 45px，以获得更好的视觉呈现 */
    width: auto;
    opacity: .6;
    transition: opacity .3s ease, transform .3s ease;
    /* 为 transform 添加过渡效果 */
}

/* 请找到并替换这条规则 */
.trust-logos img:hover {
    opacity: 1;
    transform: scale(1.05);
    /* 新增一个微妙的放大效果，提升交互感 */
}

.contact-section {
    background-color: var(--color-light-grey);
}

.contact-subtitle {
    text-align: center;
    color: var(--color-secondary);
    max-width: 500px;
    margin: -3rem auto 3rem;
}

.quote-form {
    max-width: 700px;
    margin: 0 auto;
}

.form-group {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.quote-form input,
.quote-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background-color: var(--color-light);
    font-size: 1rem;
}

.quote-form textarea {
    min-height: 120px;
    margin-bottom: 1rem;
    resize: vertical;
}

.upload-area {
    border: 2px dashed var(--color-border);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 2rem;
    cursor: pointer;
    background-color: var(--color-light);
    transition: background-color .3s ease;
}

.upload-area:hover {
    background-color: #f5faff;
}

.upload-area p strong {
    color: var(--color-primary);
}

.quote-form .cta-button {
    width: 100%;
    padding: 16px;
    font-size: 1.1rem;
}

.main-footer {
    background-color: var(--color-dark);
    color: var(--color-secondary);
    padding: 3rem 2rem;
    text-align: center;
    font-size: .9rem;
}

.main-footer .logo img {
    height: 200px;
}

.footer-column .footer-tagline {
    margin-top: -1.5rem;
}

.main-footer .section-container {
    max-width: 1280px;
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity .6s ease-out, transform .6s ease-out;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.service-item.animate-on-scroll:nth-child(2) {
    transition-delay: .1s;
}

.service-item.animate-on-scroll:nth-child(3) {
    transition-delay: .2s;
}

.service-item.animate-on-scroll:nth-child(4) {
    transition-delay: 0s;
}

.service-item.animate-on-scroll:nth-child(5) {
    transition-delay: .1s;
}

.service-item.animate-on-scroll:nth-child(6) {
    transition-delay: .2s;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 21px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 10;
}

.mobile-menu-toggle .bar {
    width: 100%;
    height: 3px;
    background-color: var(--color-dark);
    border-radius: 10px;
    transition: all .3s ease-in-out;
}

.mobile-menu-toggle.is-active .bar:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.mobile-menu-toggle.is-active .bar:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.is-active .bar:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

@media (max-width:768px) {
    .desktop-only {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--color-light);
        border-bottom: 1px solid var(--color-border);
        padding: 1rem 0;
    }

    .nav-links.nav-open {
        display: flex;
    }

    .nav-links li {
        text-align: center;
        padding: 1rem 0;
    }

    .showcase-item,
    .form-group {
        grid-template-columns: 1fr;
    }
}

@media (min-width:768px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .showcase-item {
        grid-template-columns: 1fr 1fr;
    }

    .showcase-item:nth-child(even) .showcase-image {
        order: 1;
    }

    .form-group {
        grid-template-columns: 1fr 1fr;
    }
}

.nav-item {
    position: relative;
}

.nav-links a .chevron {
    font-size: 0.7em;
    margin-left: 4px;
    transition: transform 0.3s ease;
}

.nav-item:hover>a .chevron {
    transform: rotate(180deg);
}

.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-15px);
    width: 260px;
    padding: 1rem 0;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 12px;
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--color-border);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
    z-index: 1001;
}

.nav-item:hover>.nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.nav-dropdown li {
    list-style: none;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

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

.nav-item:hover .nav-dropdown li:nth-child(1) {
    transition-delay: 0.05s;
}

.nav-item:hover .nav-dropdown li:nth-child(2) {
    transition-delay: 0.1s;
}

.nav-item:hover .nav-dropdown li:nth-child(3) {
    transition-delay: 0.15s;
}

.nav-item:hover .nav-dropdown li:nth-child(4) {
    transition-delay: 0.2s;
}

.nav-item:hover .nav-dropdown li:nth-child(5) {
    transition-delay: 0.25s;
}

.nav-item:hover .nav-dropdown li:nth-child(6) {
    transition-delay: 0.3s;
}

.nav-dropdown a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.85rem 1.5rem;
    color: var(--color-dark);
    font-weight: 500;
    transition: background-color 0.3s ease, color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.nav-icon {
    display: inline-block;
    width: 18px;
    height: 18px;
    background-color: #c0c9d7;
    border-radius: 4px;
    flex-shrink: 0;
}

.nav-dropdown a:hover {
    background-color: var(--color-primary);
    color: var(--color-light) !important;
}

.nav-dropdown a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.4s ease;
}

.nav-dropdown a:hover::before {
    left: 100%;
}


@media (max-width: 768px) {

    .nav-dropdown,
    .nav-links a .chevron {
        display: none;
    }
}

/*
  --- Icon System ---
  Applies SVG icons as background images for high-performance and easy maintenance.
*/
.nav-icon {
    display: inline-block;
    width: 20px;
    /* Unified icon width */
    height: 20px;
    /* Unified icon height */
    background-color: currentColor;
    /* Inherits color from parent text */
    -webkit-mask-size: contain;
    mask-size: contain;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
}

/* --- Service Icons --- */
.icon-cnc-machining {
    -webkit-mask-image: url('../images/ui/nav/icon-cnc-machining.svg');
    mask-image: url('../images/ui/nav/icon-cnc-machining.svg');
}

.icon-3d-printing {
    -webkit-mask-image: url('../images/ui/nav/icon-3D-printing.svg');
    mask-image: url('../images/ui/nav/icon-3D-printing.svg');
}

.icon-sheet-metal {
    -webkit-mask-image: url('../images/ui/nav/icon-sheet-metal.svg');
    mask-image: url('../images/ui/nav/icon-sheet-metal.svg');
}

.icon-vacuum-casting {
    -webkit-mask-image: url('../images/ui/nav/icon-vacuum-casting.svg');
    mask-image: url('../images/ui/nav/icon-vacuum-casting.svg');
}

.icon-tooling-molding {
    -webkit-mask-image: url('../images/ui/nav/icon-tooling-molding.svg');
    mask-image: url('../images/ui/nav/icon-tooling-molding.svg');
}

.icon-finishing-services {
    -webkit-mask-image: url('../images/ui/nav/icon-finishing-services.svg');
    mask-image: url('../images/ui/nav/icon-finishing-services.svg');
}

/* --- Industry Icons --- */
.icon-aerospace {
    -webkit-mask-image: url('../images/ui/nav/icon-aerospace.svg');
    mask-image: url('../images/ui/nav/icon-aerospace.svg');
}

.icon-medical {
    -webkit-mask-image: url('../images/ui/nav/icon-medical.svg');
    mask-image: url('../images/ui/nav/icon-medical.svg');
}

.icon-automotive {
    -webkit-mask-image: url('../images/ui/nav/icon-automotive.svg');
    mask-image: url('../images/ui/nav/icon-automotive.svg');
}

.icon-robotics {
    -webkit-mask-image: url('../images/ui/nav/icon-robotics.svg');
    mask-image: url('../images/ui/nav/icon-robotics.svg');
}

.icon-consumer-electronics {
    -webkit-mask-image: url('../images/ui/nav/icon-consumer-electronics.svg');
    mask-image: url('../images/ui/nav/icon-consumer-electronics.svg');
}

/* --- Color Control on Hover --- */
.nav-dropdown a:hover .nav-icon {
    background-color: var(--color-light);
    /* On hover, icons turn white with the text */
}

.main-footer {
    background-color: var(--color-dark);
    color: var(--color-secondary);
    padding: var(--section-padding) 0;
    font-size: 0.95rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.footer-column .logo {
    display: inline-block;
    margin-bottom: 1.5rem;
    color: var(--color-light);
}

.footer-tagline {
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.7);
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-light);
    margin-bottom: 1.5rem;
}

.footer-links-list {
    list-style: none;
    padding: 0;
}

.footer-links-list li {
    margin-bottom: 0.75rem;
}

.footer-links-list a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.social-links {
    display: flex;
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.social-links a {
    display: block;
}

.social-links img {
    height: 24px;
    width: 24px;
    filter: brightness(0) invert(0.7);
    transition: filter 0.3s ease, transform 0.3s ease;
}

.social-links a:hover img {
    filter: brightness(0) invert(1);
    transform: scale(1.1);
}

.footer-bottom {
    padding: 2rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
}

.legal-links a,
.icp-link {
    color: rgba(255, 255, 255, 0.5);
    margin-left: 1.5rem;
    transition: color 0.3s ease;
    text-decoration: none;
}

.legal-links a:hover,
.icp-link:hover {
    color: var(--color-light);
}

/* --- NEW: Standardized Inner Page Module Structures (Final Version 2.3) --- */

/* ... .page-hero-standard rules remain the same as V2.2 ... */
.page-hero-standard {
    padding: 8rem 2rem;
    text-align: center;
    position: relative;
    color: var(--color-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-hero-standard h1 {
    font-size: clamp(2.8rem, 6vw, 4.2rem);
    line-height: 1.3;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-hero-standard p {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, .9);
    max-width: 800px;
    margin: 0 auto;
}

.page-hero-standard .section-container {
    min-height: 250px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}


/* ★ REPLACE THE ENTIRE .final-cta-standard BLOCK WITH THIS FINAL VERSION ★ */

.final-cta-standard {
    /* 1. REMOVE the padding from here */
    /* padding: var(--section-padding); */

    /* 2. ADD a fixed min-height to the section itself */
    min-height: 450px;
    /* A generous, fixed height for the entire "stage" */

    /* 3. These Flexbox properties will center the .section-container */
    display: flex;
    align-items: center;
    justify-content: center;

    /* These properties remain for context */
    text-align: center;
    position: relative;
}

.final-cta-standard .section-container {
    /* 4. REMOVE the min-height from the inner container */
    /* min-height: 200px; */

    /* These properties ensure the text inside is arranged correctly */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* Text and button styles remain unchanged */
.final-cta-standard h2 {
    color: var(--color-light);
    font-size: clamp(2.2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 2rem;
}

.final-cta-standard p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2.5rem;
    font-size: 1.25rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}


/* --- NEW: Global Popup Modal Styles --- */
.popup-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 1;
    transition: opacity 0.3s ease, visibility 0.3s;
}

.popup-modal-overlay.is-hidden {
    opacity: 0;
    visibility: hidden;
}

.popup-modal-content {
    position: relative;
    background-color: var(--color-light);
    padding: 2.5rem 3rem;
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    text-align: center;
    transform: scale(1);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.popup-modal-overlay.is-hidden .popup-modal-content {
    transform: scale(0.9);
}

.popup-close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 2rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-secondary);
    transition: color 0.3s ease;
}

.popup-close-btn:hover {
    color: var(--color-dark);
}

.popup-modal-content h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.popup-modal-content p {
    color: var(--color-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.popup-contact-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.popup-contact-info a {
    color: var(--color-primary);
    font-weight: 500;
    text-decoration: none;
}