/* ==================== CSS Variables ==================== */
:root {
    /* Colors - 深色系高端定制风 */
    --primary-color: #2C241B;        /* 深棕色 - 木质 */
    --secondary-color: #F5F5F5;      /* 大理石白 */
    --accent-color: #C8102E;         /* 红色点缀 */
    --text-dark: #333333;
    --text-light: #CCCCCC;
    --bg-dark: #1A1A1A;
    --bg-light: #FFFFFF;
    --bg-gray: #F8F8F8;
    
    /* Typography */
    --font-family: 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Layout */
    --container-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

/* ==================== Reset & Base ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    line-height: var(--line-height-base);
    color: var(--text-dark);
    background-color: var(--bg-light);
}

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

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

ul {
    list-style: none;
}

/* ==================== Layout ==================== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.section__title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.section__subtitle {
    font-size: 1.2rem;
    text-align: center;
    color: #666;
    margin-bottom: var(--spacing-lg);
}

/* ==================== Header & Navigation ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav__logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.nav__menu {
    display: flex;
    gap: var(--spacing-md);
}

.nav__link {
    color: var(--text-light);
    font-size: 1rem;
    transition: var(--transition);
}

.nav__link:hover {
    color: var(--accent-color);
}

.nav__contact {
    display: flex;
    align-items: center;
}

.nav__phone {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--secondary-color);
    font-weight: 600;
    font-size: 1.1rem;
}

.nav__phone-icon {
    font-size: 1.3rem;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav__toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--secondary-color);
    transition: var(--transition);
}

/* ==================== Hero Section ==================== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 70px;
    overflow: hidden;
}

.hero__background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero__bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.8) 0%, rgba(44, 36, 27, 0.7) 100%);
}

.hero__content {
    text-align: center;
    color: var(--secondary-color);
    z-index: 1;
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero__subtitle {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-color);
    font-weight: 600;
}

.hero__description {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-light);
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn--primary {
    background-color: var(--accent-color);
    color: var(--secondary-color);
}

.btn--primary:hover {
    background-color: #A00D24;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(200, 16, 46, 0.3);
}

.btn--secondary {
    background-color: transparent;
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
}

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

/* ==================== About Section ==================== */
.about {
    background-color: var(--bg-gray);
}

.about__content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.about__article {
    background-color: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.about__subtitle {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.about__subtitle:first-child {
    margin-top: 0;
}

.about__article p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.about__list {
    margin-left: var(--spacing-md);
}

.about__list li {
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-left: var(--spacing-md);
}

.about__list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: 700;
}

.about__stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.stat-card {
    background-color: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.stat-card__number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: var(--spacing-xs);
}

.stat-card__label {
    font-size: 1rem;
    color: #666;
}

/* ==================== Advantages Section ==================== */
.advantages__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.advantage-card {
    background-color: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    text-align: center;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.advantage-card__icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.advantage-card__title {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.advantage-card__description {
    color: #666;
    line-height: 1.8;
}

/* ==================== Services Section ==================== */
.services {
    background-color: var(--bg-gray);
}

.services__category {
    margin-bottom: var(--spacing-lg);
}

.services__category-title {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.services__category-description {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.service-item {
    background-color: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.service-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

.service-item__title {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.service-item__description {
    color: #666;
    font-size: 0.95rem;
}

.services__note {
    background-color: var(--bg-light);
    padding: var(--spacing-md);
    border-left: 4px solid var(--accent-color);
    border-radius: var(--border-radius);
    color: #666;
    font-style: italic;
}

.services__process {
    margin-top: var(--spacing-lg);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.process-step {
    background-color: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: relative;
}

.process-step__number {
    width: 50px;
    height: 50px;
    background-color: var(--accent-color);
    color: var(--secondary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-sm);
}

.process-step__title {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.process-step__description {
    color: #666;
    font-size: 0.95rem;
}

/* ==================== Cases Section ==================== */
.cases__gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.case-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    background-color: var(--bg-light);
}

.case-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.case-item__image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: var(--transition);
}

.case-item:hover .case-item__image {
    transform: scale(1.05);
}

.case-item__caption {
    padding: var(--spacing-sm);
    text-align: center;
    color: var(--text-dark);
    font-size: 0.95rem;
    background-color: var(--bg-light);
}

.cases__group-title {
    font-size: 1.6rem;
    color: var(--primary-color);
    margin: var(--spacing-lg) 0 var(--spacing-md);
    padding-left: var(--spacing-sm);
    border-left: 4px solid var(--accent-color);
}

.cases__group-title:first-of-type {
    margin-top: 0;
}

.cases__note {
    margin-top: var(--spacing-md);
    text-align: center;
    color: #666;
    font-size: 0.95rem;
}

/* ==================== Partners Section ==================== */
.partners {
    background-color: var(--bg-gray);
}

.partners__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.partner-card {
    background-color: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.partner-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.partner-card__name {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.partner-card__description {
    color: #666;
}

.partners__note {
    text-align: center;
    font-size: 1.1rem;
    color: #666;
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-radius: var(--border-radius);
}

/* ==================== Contact Section ==================== */
.contact__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact__item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    background-color: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.contact__icon {
    font-size: 2rem;
}

.contact__label {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.contact__value {
    color: #666;
    font-size: 1rem;
}

.contact__link {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 1.2rem;
}

.contact__link:hover {
    text-decoration: underline;
}

.contact__qr {
    background-color: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.contact__qr-title {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.contact__qr-image {
    width: 100%;
    max-width: 300px;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--border-radius);
}

.contact__qr-description {
    font-size: 1.1rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.contact__qr-note {
    color: #666;
    font-size: 0.95rem;
}

/* ==================== Address Module ==================== */
.address-module {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    overflow: hidden;
}

.address-module__preview {
    display: block;
    width: 100%;
    max-height: 200px;
    object-fit: cover;
    object-position: center;
}

.address-module__body {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
}

.address-module__trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: var(--spacing-sm);
    padding: 0.5rem 1.2rem;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--accent-color);
    background-color: transparent;
    border: 2px solid var(--accent-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.address-module__trigger:hover {
    background-color: var(--accent-color);
    color: var(--secondary-color);
    transform: translateY(-2px);
}

.address-module__trigger-icon {
    font-size: 1rem;
}

/* ==================== Action Sheet ==================== */
.action-sheet {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-sheet[hidden] {
    display: none;
}

.action-sheet__overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity 0.25s ease;
}

.action-sheet.is-open .action-sheet__overlay {
    opacity: 1;
}

.action-sheet__panel {
    position: relative;
    width: 100%;
    max-width: 420px;
    margin: 0 var(--spacing-md);
    padding: var(--spacing-xs) 0;
    background-color: var(--bg-light);
    border-radius: calc(var(--border-radius) * 1.5);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.action-sheet.is-open .action-sheet__panel {
    opacity: 1;
    transform: translateY(0);
}

.action-sheet__title {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: center;
    font-size: 0.95rem;
    color: #666;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.action-sheet__item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 1rem var(--spacing-md);
    font-size: 1.05rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--primary-color);
    background-color: transparent;
    border: none;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.action-sheet__item:last-child {
    border-bottom: none;
}

.action-sheet__item:hover,
.action-sheet__item:active {
    background-color: var(--bg-gray);
}

.action-sheet__item-icon {
    font-size: 1.2rem;
}

.action-sheet__item--cancel {
    color: #888;
    font-weight: 500;
    border-top: 6px solid var(--bg-gray);
}

/* ==================== Toast ==================== */
.toast {
    position: fixed;
    left: 50%;
    bottom: 40px;
    z-index: 2100;
    max-width: 80%;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    color: var(--secondary-color);
    background-color: rgba(26, 26, 26, 0.92);
    border-radius: 999px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transform: translate(-50%, 20px);
    transition: opacity 0.25s ease, transform 0.25s ease;
    pointer-events: none;
}

.toast[hidden] {
    display: none;
}

.toast.is-show {
    opacity: 1;
    transform: translate(-50%, 0);
}

/* ==================== Footer ==================== */
.footer {
    background-color: var(--bg-dark);
    color: var(--text-light);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer__content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer__title {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

.footer__description {
    line-height: 1.8;
    color: var(--text-light);
}

.footer__subtitle {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer__link {
    color: var(--text-light);
    transition: var(--transition);
}

.footer__link:hover {
    color: var(--accent-color);
}

.footer__bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__copyright {
    color: var(--text-light);
    font-size: 0.9rem;
}

.footer__icp {
    margin-top: 0.35rem;
    font-size: 0.85rem;
}

.footer__icp a {
    color: var(--text-light);
    transition: var(--transition);
}

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

/* ==================== Responsive Design ==================== */
@media (max-width: 1199px) {
    .advantages__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases__gallery {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .nav__menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(26, 26, 26, 0.98);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: var(--spacing-md) 0;
    }
    
    .nav__menu.active {
        left: 0;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__contact {
        display: none;
    }
    
    .hero__title {
        font-size: 2rem;
    }
    
    .hero__subtitle {
        font-size: 1.2rem;
    }
    
    .hero__buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .about__content {
        grid-template-columns: 1fr;
    }
    
    .advantages__grid {
        grid-template-columns: 1fr;
    }
    
    .services__grid {
        grid-template-columns: 1fr;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .cases__gallery {
        grid-template-columns: 1fr;
    }
    
    .partners__grid {
        grid-template-columns: 1fr;
    }
    
    .contact__content {
        grid-template-columns: 1fr;
    }
    
    .footer__content {
        grid-template-columns: 1fr;
    }
    
    .section__title {
        font-size: 2rem;
    }
    
    .action-sheet {
        align-items: flex-end;
    }
    
    .action-sheet__panel {
        max-width: none;
        margin: 0 var(--spacing-sm) var(--spacing-sm);
    }
}