/* 頁首與導覽列元件 */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: #f8ba0e;
    color: #000;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid #fff;
}

.site-header__inner {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

/* Logo */
.site-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 900;
    flex-shrink: 0;
    font-size: var(--fs-md);
    line-height: 1.2;
    padding: 0;
}

.site-logo__mark {
    height: 1.2em;
    width: auto;
    object-fit: contain;
}

.site-logo__text {
    font-family: var(--font-logo);
    font-size: 1.3em;
    font-weight: 900;
    color: #000;
    letter-spacing: 0.06em;
    line-height: 1.2;
}

.site-header .site-logo {
    background: #fff;
    padding: 0 10px 0 5px;
}

.site-header .site-logo__text {
    display: inline;
    color: #000;
}

.site-header .site-logo__mark {
    display: block;
    height: 3.1rem;
    width: auto;
    aspect-ratio: 61 / 40;
    object-fit: contain;
}

.site-logo__text--light {
    color: var(--color-white);
}

/* 桌面導覽 */
.site-nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.site-nav__link {
    font-size: var(--fs-md);
    font-weight: 400;
    color: #000;
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius-md);
    transition: background-color var(--transition), color var(--transition);
}

.site-nav__link:hover {
    background: #ffe293;
    color: #000;
}

.site-nav__link.is-active {
    color: #000;
    font-weight: 400;
}

/* 漢堡按鈕（桌面隱藏） */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: calc(2.75rem * 0.7);
    height: calc(2.75rem * 0.7);
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav-toggle__bar {
    display: block;
    width: 1.6rem;
    height: 2px;
    background: #000;
    transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.is-open .nav-toggle__bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.nav-toggle.is-open .nav-toggle__bar:nth-child(2) {
    opacity: 0;
}
.nav-toggle.is-open .nav-toggle__bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* 手機側拉選單 */
.mobile-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 78%;
    max-width: 320px;
    height: 100vh;
    background: var(--color-white);
    box-shadow: var(--shadow-lg);
    padding: calc(var(--header-height) + var(--space-md)) var(--space-lg) var(--space-lg);
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 99;
    overflow-y: auto;
}

.mobile-nav.is-open {
    transform: translateX(0);
}

.mobile-nav__list li {
    border-bottom: 1px solid var(--color-border);
}

.mobile-nav__link {
    display: block;
    padding: var(--space-md) 0;
    font-size: var(--fs-md);
    font-weight: 100;
}

.mobile-nav__link.is-active {
    color: #eb8900;
    font-weight: 100;
}

.mobile-nav a:hover,
.mobile-nav__sublink:hover {
    color: #eb8900;
}

.mobile-nav__sublink {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    padding: 0.5rem 0;
    font-size: var(--fs-base);
    color: var(--color-text-soft);
    text-decoration: none;
}

.mobile-nav__sublink-arrow {
    width: 0.875rem;
    height: 0.875rem;
    flex-shrink: 0;
    opacity: 0.55;
}

.mobile-nav__overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition);
    z-index: 98;
}

.mobile-nav__overlay.is-open {
    opacity: 1;
    visibility: visible;
}

/* 響應式：平板以下收合桌面選單、顯示漢堡 */
@media (max-width: 1024px) {
    .site-nav,
    .site-header__cta {
        display: none;
    }
    .nav-toggle {
        display: flex;
    }
}

@media (min-width: 1025px) {
    .site-header .site-logo {
        display: none;
    }
}

/* 內頁頂部橫幅（banner 背景 + logo，位於 topnav 上方） */
.site-page-banner {
    height: 180px;
    width: 100%;
    background: url("../img/banner.jpg") center / cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
}

.site-page-banner__inner {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    height: 100%;
    max-width: min(100%, 56rem);
    padding: 0 var(--space-md);
}

.site-page-banner__logo {
    display: block;
    height: 80%;
    width: auto;
    max-width: min(90%, 20rem);
    flex-shrink: 0;
    object-fit: contain;
}

.site-page-banner__tagline {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    margin: 0;
    font-size: var(--fs-xl);
    color: var(--color-banner-tagline);
    letter-spacing: 0.04em;
    line-height: 1.35;
    text-align: center;
    align-items: center;
    -webkit-text-stroke: 4px var(--color-white);
    paint-order: stroke fill;
}

.site-page-banner__tagline-line {
    display: block;
}

.site-page-banner__tagline-line:first-child {
    font-weight: 700;
}

@media (max-width: 1024px) {
    .site-page-banner {
        display: none;
    }
}