/* ============================================
   CSS变量 - 设计系统
   ============================================ */
:root {
    /* 颜色系统 */
    --primary-orange: #2C3E50;           /* 主色调-深蓝灰 */
    --logo-green: #7F8C8D;               /* Logo中性灰 */
    --teal: #34495E;                     /* 石墨蓝 */
    --accent-yellow: #BDC3C7;            /* 银灰色 */
    --accent-red: #95A5A6;               /* 雾灰色 */
    --accent-blue: #5D6D7E;              /* 钢青色 */
    --accent-green: #85929E;             /* 云灰色 */
    --text-primary: #FFFFFF;             /* 主文本色（白色） */
    --text-secondary: #ECF0F1;           /* 次要文本色-浅云灰 */
    
    /* 字体系统 */
    --font-family-primary: 'PingFang TC', 'Microsoft YaHei', '微软雅黑', 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;             /* 12px */
    --font-size-sm: 0.875rem;            /* 14px */
    --font-size-md: 1rem;                /* 16px */
    --font-size-lg: 1.125rem;            /* 18px */
    --font-size-xl: 1.25rem;             /* 20px */
    --font-size-2xl: 1.5rem;             /* 24px */
    --font-size-3xl: 2rem;               /* 32px */
    --font-size-4xl: 3rem;               /* 48px */
    
    /* 间距系统 */
    --spacing-xs: 0.25rem;               /* 4px */
    --spacing-sm: 0.5rem;                /* 8px */
    --spacing-md: 1rem;                  /* 16px */
    --spacing-lg: 1.5rem;                /* 24px */
    --spacing-xl: 2rem;                  /* 32px */
    --spacing-2xl: 3rem;                 /* 48px */
    --spacing-3xl: 4rem;                 /* 64px */
    
    /* 圆角系统 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* 阴影系统 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
    
    /* 过渡动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   基础样式重置
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-primary);
    color: var(--text-primary);
    background-color: var(--primary-orange);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* ============================================
   顶部导航栏
   ============================================ */
.header {
    background-color: var(--primary-orange);
    padding: var(--spacing-md) var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header__container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--spacing-lg);
}

/* Logo样式 */
.header__logo {
    display: flex;
    flex-direction: column;
    font-size: var(--font-size-xl);
    font-weight: 600;
    line-height: 1.2;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.header__logo:hover {
    transform: scale(1.05);
}

.logo-text {
    font-family: 'Brush Script MT', 'Brush Script', 'KaiTi', '楷体', cursive;
    color: var(--logo-green);
    display: block;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.logo-text--sierra {
    font-size: 1.1em;
}

.logo-text--sea {
    font-size: 1em;
}

/* 导航菜单 */
.header__nav {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: nowrap;
}

.nav-primary,
.nav-secondary {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    flex-wrap: nowrap;
}

.nav-primary {
    margin-right: var(--spacing-lg);
}

.nav-secondary {
    font-size: var(--font-size-lg);
}

.nav-link {
    color: var(--text-primary);
    font-size: var(--font-size-xl);
    font-weight: 700;
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: opacity var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link:focus {
    opacity: 0.8;
    outline: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--text-primary);
    transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link--active::after {
    width: 80%;
}

.nav-link--secondary {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

/* 语言选择器 */
.header__lang {
    justify-self: end;
}

.lang-selector {
    background-color: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='white' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-xs) center;
    padding-right: var(--spacing-xl);
    transition: border-color var(--transition-fast);
}

.lang-selector:hover,
.lang-selector:focus {
    border-color: rgba(255, 255, 255, 0.6);
    outline: none;
}

/* ============================================
   Hero区域
   ============================================ */
.hero {
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero__image {
    width: 100%;
    position: relative;
    z-index: 1;
}

.hero__image img {
    width: 100%;
    height: auto;
    display: block;
}

.hero__container {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    padding: var(--spacing-3xl) var(--spacing-lg);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Hero标题 */
.hero__content {
    text-align: center;
    position: relative;
    z-index: 10;
}

.hero__title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-2xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.hero__title .logo-text {
    font-size: 1em;
    font-family: 'Brush Script MT', 'Brush Script', 'KaiTi', '楷体', cursive;
    color: var(--logo-green);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    text-align: center;
}

.btn--primary {
    background-color: #A1A82F;
    color: var(--text-primary);
}

.btn--primary:hover,
.btn--primary:focus {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    outline: none;
}

.btn--primary:active {
    transform: translateY(0);
}

.btn__icon {
    width: 20px;
    height: 20px;
}


/* ============================================
   交通/位置信息区域
   ============================================ */
.transportation {
    background-color: var(--primary-orange);
    padding: var(--spacing-3xl) var(--spacing-lg);
    position: relative;
}

.transportation__container {
    max-width: 1400px;
    margin: 0 auto;
}

/* 波浪装饰 */
.transportation__waves {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    overflow: hidden;
    pointer-events: none;
}

.wave {
    position: absolute;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    opacity: 0.3;
}

.wave--left {
    background: var(--teal);
    top: -100px;
    left: -50px;
}

.wave--right {
    background: var(--logo-green);
    top: -100px;
    right: -50px;
}

/* 交通图表 */
.transportation__image {
    width: 100%;
    max-width: 1200px;
    margin: var(--spacing-2xl) auto;
    padding: 0 var(--spacing-lg);
}

.transportation__image img {
    width: 100%;
    height: auto;
    display: block;
}

/* 车站样式 */
.station {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.station--left {
    align-items: flex-end;
}

.station--right {
    align-items: flex-start;
}

.station__header {
    text-align: center;
}

.station__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.station__subtitle {
    font-size: var(--font-size-md);
    opacity: 0.9;
}

.station__train {
    margin: var(--spacing-md) 0;
}

.train-icon {
    display: block;
}

/* 公交标签 */
.station__buses {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.bus-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.bus-badge--red {
    background-color: var(--accent-red);
}

.bus-badge--green {
    background-color: var(--accent-green);
}

.bus-badge--blue {
    background-color: var(--accent-blue);
}

.station__arrow {
    width: 100%;
    display: flex;
    justify-content: center;
    margin: var(--spacing-md) 0;
}

/* 中央连接点 */
.connection {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 200px;
}

.connection__logo {
    font-size: var(--font-size-xl);
    text-align: center;
}

.connection__badges {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.connection-badge {
    background-color: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-md);
    font-weight: 600;
    backdrop-filter: blur(10px);
}

.connection-icon {
    width: 24px;
    height: 24px;
}

/* 描述文字 */
.transportation__description {
    text-align: center;
    max-width: 800px;
    margin: var(--spacing-2xl) auto 0;
    font-size: var(--font-size-lg);
    line-height: 1.8;
    opacity: 0.95;
}

/* ============================================
   底部区域
   ============================================ */
.location {
    background-color: var(--primary-orange);
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.location__container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.location__image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.location__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.location__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

.location__text {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    line-height: 1.8;
}

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

.info-item {
    font-size: var(--font-size-lg);
    line-height: 2;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.info-item strong {
    font-weight: 600;
    margin-right: var(--spacing-sm);
}

/* ============================================
   布局圖區域
   ============================================ */
.layout {
    background-color: var(--primary-orange);
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.layout__container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.layout__image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.layout__image img {
    width: 100%;
    height: auto;
    display: block;
}

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

.layout__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-primary);
}

/* ============================================
   預約參觀表單
   ============================================ */
.appointment {
    background-color: var(--primary-orange);
    padding: var(--spacing-3xl) var(--spacing-lg);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
}

.appointment__container {
    max-width: 1400px;
    width: 100%;
    display: flex;
    justify-content: center;
}

.appointment__form-wrapper {
    background-color: #FFFFFF;
    border-radius: var(--radius-md);
    padding: var(--spacing-3xl) var(--spacing-2xl);
    max-width: 600px;
    width: 100%;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.appointment__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid #E5E5E5;
}

.appointment__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: #000000;
    margin: 0;
}

.appointment__logo {
    display: flex;
    flex-direction: column;
    font-size: var(--font-size-xl);
    line-height: 1.2;
}

.appointment__logo .logo-text {
    font-family: 'Brush Script MT', 'Brush Script', 'KaiTi', '楷体', cursive;
    display: block;
}

.appointment__logo .logo-text--sierra {
    color: var(--logo-green);
    font-size: 1.1em;
}

.appointment__logo .logo-text--sea {
    color: #40E0D0;
    font-size: 1em;
}

/* 表單樣式 */
.appointment__form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-label {
    font-size: var(--font-size-md);
    font-weight: 500;
    color: #000000;
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm) 0;
    border: none;
    border-bottom: 1px solid #000000;
    font-size: var(--font-size-md);
    color: #000000;
    background-color: transparent;
    outline: none;
    transition: border-color var(--transition-fast);
}

.form-input:focus {
    border-bottom-color: var(--primary-orange);
}

.form-input::placeholder {
    color: #999999;
}

.form-input-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-bottom: 1px solid #000000;
}

.form-select {
    padding: var(--spacing-sm) var(--spacing-xs);
    border: none;
    background-color: transparent;
    font-size: var(--font-size-md);
    color: #000000;
    cursor: pointer;
    outline: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%23000000' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right center;
    padding-right: var(--spacing-lg);
}

.form-input-group .form-input {
    border-bottom: none;
    flex: 1;
}

.form-input-with-icon {
    position: relative;
    display: flex;
    align-items: center;
    border-bottom: 1px solid #000000;
    gap: var(--spacing-sm);
}

.form-icon {
    color: #000000;
    flex-shrink: 0;
}

.form-input-with-icon .form-input {
    border-bottom: none;
    flex: 1;
}

.time-period {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-left: var(--spacing-xs);
}

.period-char {
    font-size: var(--font-size-xs);
    color: #000000;
    line-height: 1;
}

.btn--submit {
    background-color: #000000;
    color: #FFFFFF;
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-size: var(--font-size-lg);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    margin-top: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn--submit:hover,
.btn--submit:focus {
    background-color: #333333;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    outline: none;
}

.btn--submit:active {
    transform: translateY(0);
}

/* ============================================
   頁腳
   ============================================ */
.footer {
    background-color: #1a1a1a;
    padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__container {
    max-width: 1400px;
    margin: 0 auto;
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

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

.footer__logo {
    font-size: var(--font-size-2xl);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

.footer__logo .logo-text {
    font-family: 'Brush Script MT', 'Brush Script', 'KaiTi', '楷体', cursive;
    color: var(--logo-green);
    display: block;
}

.footer__logo .logo-text--sierra {
    font-size: 1.1em;
}

.footer__logo .logo-text--sea {
    font-size: 1em;
}

.footer__developer,
.footer__address {
    font-size: var(--font-size-md);
    color: var(--text-primary);
    opacity: 0.9;
    line-height: 1.6;
    margin: 0;
}

.footer__heading {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.footer__nav {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer__link {
    color: var(--text-primary);
    font-size: var(--font-size-md);
    text-decoration: none;
    opacity: 0.9;
    transition: opacity var(--transition-fast);
    display: inline-block;
}

.footer__link:hover,
.footer__link:focus {
    opacity: 1;
    text-decoration: underline;
    outline: none;
}

.footer__info {
    font-size: var(--font-size-md);
    color: var(--text-primary);
    opacity: 0.9;
    line-height: 1.8;
    margin: 0 0 var(--spacing-xs) 0;
}

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

.footer__copyright {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    opacity: 0.8;
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   响应式设计
   ============================================ */

/* 平板设备 (768px - 1023px) */
@media (max-width: 1023px) {
    .transportation__diagram {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .station--left,
    .station--right {
        align-items: center;
    }

    .station__arrow {
        transform: rotate(90deg);
    }

    .location__container,
    .layout__container {
        grid-template-columns: 1fr;
    }

    .layout__content {
        padding: var(--spacing-md);
    }

    .appointment__form-wrapper {
        padding: var(--spacing-xl);
    }

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

    .form-input-group {
        flex-wrap: wrap;
    }
}

/* 移动设备 (< 768px) */
@media (max-width: 767px) {
    :root {
        font-size: 14px;
    }

    .header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .header__container {
        grid-template-columns: 1fr;
        justify-items: center;
        gap: var(--spacing-sm);
    }

    .header__logo {
        justify-self: start;
    }

    .header__nav {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    .nav-primary {
        margin-right: var(--spacing-md);
    }

    .nav-primary,
    .nav-secondary {
        flex-wrap: wrap;
        gap: var(--spacing-md);
        justify-content: center;
    }

    .header__lang {
        justify-self: end;
        position: absolute;
        top: var(--spacing-sm);
        right: var(--spacing-md);
    }

    .hero__container {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .hero__title {
        font-size: var(--font-size-3xl);
    }

    .transportation {
        padding: var(--spacing-2xl) var(--spacing-md);
    }

    .transportation__image {
        padding: 0 var(--spacing-md);
        margin: var(--spacing-xl) auto;
    }

    .station__title {
        font-size: var(--font-size-xl);
    }

    .transportation__description {
        font-size: var(--font-size-md);
    }

    .location {
        padding: var(--spacing-2xl) var(--spacing-md);
    }

    .location__content {
        padding: var(--spacing-md);
    }

    .location__title {
        font-size: var(--font-size-xl);
    }

    .footer {
        padding: var(--spacing-2xl) var(--spacing-md) var(--spacing-lg);
    }

    .footer__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .footer__heading {
        font-size: var(--font-size-md);
    }
}

/* 超小屏幕 (< 480px) */
@media (max-width: 479px) {
    .hero__title {
        font-size: var(--font-size-2xl);
    }

    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-md);
    }

    .connection {
        min-width: auto;
    }

    .connection__badges {
        font-size: var(--font-size-sm);
    }

    .nav-primary {
        gap: var(--spacing-sm);
    }

    .nav-link {
        font-size: var(--font-size-sm);
    }
}

/* ============================================
   无障碍访问优化
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 焦点可见性 */
*:focus-visible {
    outline: 2px solid var(--logo-green);
    outline-offset: 2px;
}