/* ================================================
   云栖国际酒店 · 单页展示网站样式
   结构：导航 / Banner / 预订条 / 关于 / 客房 / 设施 / 联系 / 页脚
================================================ */

/* ---------- 设计变量 ---------- */
:root {
    --color-primary: #b08d57;        /* 金色 */
    --color-primary-dark: #96733f;
    --color-dark: #1f2937;
    --color-dark-2: #111827;
    --color-text: #4b5563;
    --color-text-light: #9ca3af;
    --color-bg: #ffffff;
    --color-bg-alt: #f7f5f1;
    --color-border: #e5e7eb;
    --shadow-sm: 0 2px 10px rgba(17, 24, 39, .06);
    --shadow-md: 0 8px 30px rgba(17, 24, 39, .10);
    --radius: 14px;
    --header-h: 72px;
    --transition: .35s ease;
}

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button, input, select, textarea { font: inherit; }

.container { width: min(1140px, 92%); margin-inline: auto; }
.grid { display: grid; gap: 2rem; }
.section { padding: 96px 0; }

/* ---------- 通用标题 ---------- */
.section__head { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.section__subtitle {
    display: inline-block;
    font-size: .78rem;
    letter-spacing: .35em;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: .6rem;
}
.section__title {
    font-size: clamp(1.7rem, 3.5vw, 2.4rem);
    color: var(--color-dark);
    font-weight: 700;
    margin-bottom: .8rem;
}
.section__desc { color: var(--color-text-light); }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: .85rem 2.1rem;
    background: var(--color-primary);
    color: #fff;
    border: 1px solid var(--color-primary);
    border-radius: 999px;
    font-weight: 600;
    font-size: .95rem;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}
.btn:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; border-color: rgba(255,255,255,.7); color: #fff; }
.btn--ghost:hover { background: rgba(255,255,255,.15); border-color: #fff; }
.btn--small { padding: .55rem 1.4rem; font-size: .88rem; }

/* ==================================================
   导航栏
================================================== */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-h);
    z-index: 100;
    transition: var(--transition);
}
.header.scrolled {
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
}
.nav { height: 100%; display: flex; align-items: center; justify-content: space-between; }

.nav__logo {
    display: flex; align-items: center; gap: .55rem;
    font-size: 1.2rem; font-weight: 700;
    color: #fff;
    transition: var(--transition);
}
.header.scrolled .nav__logo { color: var(--color-dark); }
.nav__logo-icon {
    width: 34px; height: 34px;
    display: grid; place-items: center;
    background: var(--color-primary); color: #fff;
    border-radius: 8px;
    font-size: 1rem;
}

.nav__menu { display: flex; align-items: center; gap: 2rem; }
.nav__list { display: flex; gap: 2rem; }
.nav__link {
    position: relative;
    font-size: .95rem; font-weight: 500;
    color: rgba(255,255,255,.85);
    transition: var(--transition);
}
.header.scrolled .nav__link { color: var(--color-text); }
.nav__link::after {
    content: "";
    position: absolute; left: 0; bottom: -6px;
    width: 0; height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}
.nav__link:hover::after, .nav__link.active-link::after { width: 100%; }
.nav__close { display: none; }

/* 汉堡按钮 */
.nav__toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; z-index: 110; }
.nav__toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: var(--transition); }
.header.scrolled .nav__toggle span { background: var(--color-dark); }

/* ==================================================
   Hero Banner（宽屏）
================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    align-items: center;
    overflow: hidden;
}
.hero__bg { position: absolute; inset: 0; }
.hero__bg img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero__bg::after {
    content: "";
    position: absolute; inset: 0;
    background: linear-gradient(105deg, rgba(10, 18, 32, .72) 0%, rgba(10, 18, 32, .35) 55%, rgba(10, 18, 32, .15) 100%);
}
.hero__content { position: relative; z-index: 2; color: #fff; padding-top: var(--header-h); }
.hero__subtitle { letter-spacing: .4em; font-size: .8rem; color: #e8d5b5; font-weight: 600; }
.hero__title {
    font-size: clamp(2.4rem, 7vw, 4.4rem);
    line-height: 1.25;
    font-weight: 800;
    margin: 1rem 0 1.2rem;
    text-shadow: 0 4px 30px rgba(0,0,0,.35);
}
.hero__desc { font-size: clamp(.95rem, 1.6vw, 1.1rem); color: rgba(255,255,255,.85); margin-bottom: 2.2rem; }
.hero__actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero__scroll {
    position: absolute; left: 50%; bottom: 28px;
    transform: translateX(-50%);
    width: 26px; height: 42px;
    border: 2px solid rgba(255,255,255,.55);
    border-radius: 14px;
    z-index: 2;
}
.hero__scroll span {
    position: absolute; left: 50%; top: 7px;
    width: 4px; height: 8px;
    margin-left: -2px;
    background: #fff; border-radius: 2px;
    animation: scrollDown 1.8s infinite;
}
@keyframes scrollDown {
    0% { opacity: 1; transform: translateY(0); }
    70% { opacity: 0; transform: translateY(16px); }
    100% { opacity: 0; }
}

/* ==================================================
   快速预订条
================================================== */
.booking-bar {
    position: relative;
    z-index: 5;
    margin-top: -52px;
    padding-bottom: 8px;
}
.booking-form {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 1.4rem 1.6rem;
    display: grid;
    grid-template-columns: repeat(4, 1fr) auto;
    gap: 1.2rem;
    align-items: end;
}
.booking-form__field { display: flex; flex-direction: column; gap: .35rem; }
.booking-form__field label { font-size: .82rem; font-weight: 600; color: var(--color-dark); }
.booking-form__field input,
.booking-form__field select {
    padding: .65rem .8rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text);
    background: var(--color-bg-alt);
    transition: var(--transition);
}
.booking-form__field input:focus,
.booking-form__field select:focus { outline: none; border-color: var(--color-primary); background: #fff; }
.booking-form__btn { height: 46px; }
.booking-form__msg { margin-top: .8rem; text-align: center; font-size: .92rem; color: var(--color-primary-dark); font-weight: 600; min-height: 1.4em; }

/* ==================================================
   关于我们
================================================== */
.about__container { grid-template-columns: 1.1fr .9fr; align-items: center; }
.about__text { margin-bottom: 1.1rem; }
.about__stats { grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-top: 2rem; }
.about__stat {
    background: var(--color-bg-alt);
    border-radius: var(--radius);
    padding: 1.2rem .6rem;
    text-align: center;
}
.stat__num { font-size: 1.9rem; font-weight: 800; color: var(--color-primary); }
.stat__label { font-size: .82rem; color: var(--color-text-light); }
.about__img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.about__img img { height: 100%; object-fit: cover; transition: transform .8s ease; }
.about__img:hover img { transform: scale(1.05); }

/* ==================================================
   客房
================================================== */
.rooms { background: var(--color-bg-alt); }
.rooms__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.6rem;
}
.room-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.room-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); }
.room-card__img { position: relative; aspect-ratio: 4 / 3; overflow: hidden; }
.room-card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s ease; }
.room-card:hover .room-card__img img { transform: scale(1.08); }
.room-card__tag {
    position: absolute; top: 12px; left: 12px;
    padding: .2rem .8rem;
    font-size: .75rem; font-weight: 600;
    color: #fff; background: var(--color-dark);
    border-radius: 999px;
}
.room-card__tag--gold { background: var(--color-primary); }
.room-card__body { padding: 1.3rem 1.3rem 1.5rem; display: flex; flex-direction: column; flex: 1; }
.room-card__title { font-size: 1.15rem; color: var(--color-dark); margin-bottom: .4rem; }
.room-card__meta { font-size: .82rem; color: var(--color-text-light); display: flex; gap: .45rem; margin-bottom: .6rem; }
.room-card__desc { font-size: .88rem; flex: 1; }
.room-card__footer {
    display: flex; align-items: center; justify-content: space-between;
    margin-top: 1.1rem; padding-top: 1rem;
    border-top: 1px dashed var(--color-border);
}
.room-card__price { color: var(--color-dark); font-weight: 700; font-size: 1.25rem; }
.room-card__price em { font-style: normal; font-size: .85rem; color: var(--color-primary); margin-right: 2px; }
.room-card__price span { font-size: .8rem; color: var(--color-text-light); font-weight: 400; }

/* ==================================================
   设施服务
================================================== */
.facilities__grid { grid-template-columns: repeat(2, 1fr); gap: 1.8rem; }
.fac-card {
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
    box-shadow: var(--shadow-sm);
    display: grid;
    grid-template-columns: 1fr 1fr;
    transition: var(--transition);
}
.fac-card:hover { box-shadow: var(--shadow-md); transform: translateY(-5px); }
.fac-card__img { overflow: hidden; }
.fac-card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s ease; }
.fac-card:hover .fac-card__img img { transform: scale(1.07); }
.fac-card__body { padding: 1.8rem 1.6rem; display: flex; flex-direction: column; justify-content: center; }
.fac-card__body h3 { color: var(--color-dark); font-size: 1.2rem; margin-bottom: .6rem; }
.fac-card__body p { font-size: .9rem; }

/* ==================================================
   联系我们
================================================== */
.contact { background: var(--color-bg-alt); }
.contact__container { grid-template-columns: 1fr 1.1fr; align-items: start; }
.contact__text { margin-bottom: 1.6rem; }
.contact__list li {
    display: flex; gap: 1rem;
    padding: .8rem 0;
    border-bottom: 1px dashed var(--color-border);
    font-size: .95rem;
}
.contact__list strong { color: var(--color-dark); min-width: 4.5rem; }

.contact__form {
    background: #fff;
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    display: flex; flex-direction: column; gap: 1rem;
}
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.contact__form input,
.contact__form textarea {
    padding: .8rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-bg-alt);
    resize: vertical;
    transition: var(--transition);
}
.contact__form input:focus,
.contact__form textarea:focus { outline: none; border-color: var(--color-primary); background: #fff; }
.form__msg { font-size: .9rem; color: var(--color-primary-dark); font-weight: 600; min-height: 1.3em; }

/* ==================================================
   页脚
================================================== */
.footer { background: var(--color-dark-2); color: #d1d5db; }
.footer__container { grid-template-columns: 1.3fr 1fr 1fr; padding: 64px 0 40px; }
.footer__logo { color: #fff; margin-bottom: 1rem; }
.footer__text { font-size: .9rem; color: var(--color-text-light); }
.footer__col h4 { color: #fff; margin-bottom: 1.1rem; font-size: 1rem; }
.footer__col ul li { margin-bottom: .55rem; font-size: .9rem; }
.footer__col ul a:hover { color: var(--color-primary); }
.footer__bottom {
    border-top: 1px solid rgba(255,255,255,.08);
    padding: 1.2rem 0;
    text-align: center;
    font-size: .82rem;
    color: var(--color-text-light);
}

/* ==================================================
   返回顶部
================================================== */
.scrolltop {
    position: fixed; right: 22px; bottom: 22px;
    width: 44px; height: 44px;
    display: grid; place-items: center;
    background: var(--color-primary); color: #fff;
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    opacity: 0; pointer-events: none;
    transform: translateY(14px);
    transition: var(--transition);
    z-index: 90;
}
.scrolltop.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.scrolltop:hover { background: var(--color-primary-dark); }

/* ==================================================
   滚动进场动画（JS 控制）
================================================== */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ==================================================
   响应式：平板 ≤ 992px
================================================== */
@media (max-width: 992px) {
    .section { padding: 76px 0; }
    .booking-form { grid-template-columns: repeat(2, 1fr); }
    .booking-form__btn { grid-column: 1 / -1; }
    .rooms__grid { grid-template-columns: repeat(2, 1fr); }
    .facilities__grid { grid-template-columns: 1fr; }
    .about__container { grid-template-columns: 1fr; }
    .about__img { order: -1; max-height: 420px; }
}

/* ==================================================
   响应式：手机 ≤ 768px
================================================== */
@media (max-width: 768px) {
    :root { --header-h: 64px; }

    /* 汉堡按钮 & 抽屉菜单 */
    .nav__toggle { display: flex; }
    .nav__close {
        display: block;
        position: absolute; top: 20px; right: 24px;
        font-size: 1.7rem; color: var(--color-dark);
        cursor: pointer;
    }
    .nav__menu {
        position: fixed;
        top: 0; right: -100%;
        width: min(320px, 80vw);
        height: 100vh;
        background: #fff;
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        gap: 1.6rem;
        padding: 84px 2rem 2rem;
        box-shadow: -8px 0 40px rgba(0,0,0,.12);
        transition: right .4s ease;
        z-index: 105;
    }
    .nav__menu.open { right: 0; }
    .nav__list { flex-direction: column; gap: 1.2rem; width: 100%; }
    .nav__link { color: var(--color-dark); font-size: 1.05rem; }
    .nav__book { width: 100%; }

    .hero__title { margin-top: .8rem; }
    .hero__actions .btn { flex: 1; min-width: 130px; }

    .booking-bar { margin-top: -36px; }
    .booking-form { grid-template-columns: 1fr; padding: 1.2rem; }

    .rooms__grid { grid-template-columns: 1fr; }
    .fac-card { grid-template-columns: 1fr; }
    .fac-card__img { aspect-ratio: 16 / 9; }
    .form__row { grid-template-columns: 1fr; }
    .contact__container { grid-template-columns: 1fr; }
    .footer__container { grid-template-columns: 1fr; gap: 2.2rem; }
    .about__stats { grid-template-columns: repeat(2, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; transition: none; }
}