/* ==========================================
   1. 全局初始化与变量
   ========================================== */
:root {
    --bg-color: #fcfaf2;
    --text-color: #2c2c2c;
    --text-muted: #6b6560;
    --accent-color: #bc2d29;
    --accent-hover: #a02522;
    --card-bg: #ffffff;
    --font-serif: "Noto Serif JP", "Georgia", serif;
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --shadow-sm: 0 2px 8px rgba(44, 44, 44, 0.06);
    --shadow-md: 0 8px 32px rgba(44, 44, 44, 0.10);
    --shadow-lg: 0 16px 48px rgba(44, 44, 44, 0.14);
    --radius: 12px;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: inherit;
}

/* ==========================================
   2. 通用区块样式
   ========================================== */
.section-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-label {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent-color);
    margin-bottom: 0.75rem;
}

section h2 {
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 600;
    letter-spacing: 0.04em;
    margin-bottom: 2.5rem;
    position: relative;
    padding-bottom: 1rem;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 48px;
    height: 3px;
    background-color: var(--accent-color);
}

#story .section-inner,
#menu .section-inner,
#reservation .section-inner,
#info .section-inner {
    text-align: center;
}

#story h2::after,
#menu h2::after,
#reservation h2::after,
#info h2::after {
    left: 50%;
    transform: translateX(-50%);
}

/* ==========================================
   3. 导航栏
   ========================================== */
header {
    background-color: rgba(44, 44, 44, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: #ffffff;
    position: sticky;
    top: 0;
    z-index: 200;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.1rem 2.5rem;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 2rem;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.65rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-decoration: none;
    color: #ffffff;
    white-space: nowrap;
    grid-column: 1;
}

.logo span {
    color: var(--accent-color);
}

.site-nav {
    grid-column: 2;
    justify-self: center;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.site-nav a {
    color: rgba(255, 255, 255, 0.72);
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 0.5rem 0.9rem;
    position: relative;
    transition: color var(--transition);
}

.site-nav a::after {
    content: '';
    position: absolute;
    left: 0.9rem;
    right: 0.9rem;
    bottom: 0.2rem;
    height: 1px;
    background-color: var(--accent-color);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition);
}

.site-nav a:hover {
    color: #ffffff;
}

.site-nav a:hover::after {
    transform: scaleX(1);
}

.header-cta {
    grid-column: 3;
    justify-self: end;
    background-color: var(--accent-color);
    color: #ffffff;
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.65rem 1.5rem;
    border-radius: 999px;
    white-space: nowrap;
    transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.header-cta:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(188, 45, 41, 0.4);
}

.nav-cta-mobile {
    display: none;
}

.nav-toggle-input {
    display: none;
}

.nav-toggle-label {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    cursor: pointer;
    padding: 4px;
    grid-column: 3;
    justify-self: end;
}

.nav-toggle-label span {
    display: block;
    height: 2px;
    background-color: #ffffff;
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

/* legacy alias kept for any stray refs */
.btn-cta {
    background-color: var(--accent-color) !important;
    color: #ffffff !important;
    font-weight: 500 !important;
    padding: 0.55rem 1.4rem !important;
    border-radius: 999px;
    margin-left: 0.75rem;
    letter-spacing: 0.04em;
    transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition) !important;
}

.btn-cta:hover {
    background-color: var(--accent-hover) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(188, 45, 41, 0.4);
}

/* ==========================================
   4. Hero 巨幕区
   ========================================== */
#hero {
    position: relative;
    height: 88vh;
    min-height: 520px;
    max-height: 900px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: url('images/拉面.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(20, 18, 16, 0.45) 0%,
        rgba(20, 18, 16, 0.62) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 2rem;
    max-width: 820px;
    animation: fadeUp 1s ease both;
}

.hero-eyebrow {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.5rem;
}

.hero-tagline {
    font-family: var(--font-serif);
    font-size: clamp(1.6rem, 4.5vw, 2.8rem);
    font-weight: 600;
    color: #ffffff;
    line-height: 1.5;
    letter-spacing: 0.06em;
    text-shadow: 0 2px 24px rgba(0, 0, 0, 0.3);
    margin-bottom: 1.75rem;
}

.hero-google-rating {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 2rem;
    padding: 0.65rem 1.15rem;
    border-radius: 999px;
    background-color: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.22);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #ffffff;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: background-color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.hero-google-rating:hover {
    background-color: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.35);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.hero-google-rating-score {
    font-weight: 600;
    font-size: 1.05rem;
}

.hero-google-rating-stars {
    display: inline-flex;
    align-items: center;
    gap: 0.1rem;
    color: #fbbc04;
}

.hero-google-rating-count {
    color: rgba(255, 255, 255, 0.88);
}

.hero-google-rating-label {
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.85rem;
    font-weight: 400;
}

.hero-google-rating-label::before {
    content: '·';
    margin-right: 0.45rem;
    color: rgba(255, 255, 255, 0.4);
}

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

.btn {
    display: inline-block;
    padding: 0.85rem 2rem;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(188, 45, 41, 0.45);
}

.btn-outline {
    background-color: transparent;
    color: #ffffff;
    border: 1.5px solid rgba(255, 255, 255, 0.75);
}

.btn-outline:hover {
    background-color: rgba(255, 255, 255, 0.12);
    border-color: #ffffff;
    transform: translateY(-2px);
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================
   5. 品牌故事
   ========================================== */
#story {
    padding: 7rem 0;
}

.story-lead {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: var(--text-color);
    margin-bottom: 1.25rem;
    line-height: 1.9;
}

#story p {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.9;
}

/* ==========================================
   6. 菜单区
   ========================================== */
#menu {
    padding: 7rem 0;
    background-color: #f5f2ea;
}

.menu-intro {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: -1.5rem auto 3.5rem;
    letter-spacing: 0.04em;
}

.menu-note {
    text-align: center;
    font-size: 0.88rem;
    color: var(--accent-color);
    background-color: rgba(188, 45, 41, 0.07);
    padding: 0.75rem 1.25rem;
    border-radius: 6px;
    margin: -1rem auto 2rem;
    max-width: 480px;
}

.menu-category {
    margin-bottom: 4rem;
    text-align: left;
}

.menu-category:last-of-type {
    margin-bottom: 0;
}

.category-title {
    font-family: var(--font-serif);
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    font-weight: 600;
    letter-spacing: 0.04em;
    margin-bottom: 1.75rem;
    color: var(--text-color);
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(44, 44, 44, 0.1);
}

.category-title span {
    display: block;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-top: 0.4rem;
}

.menu-list {
    list-style: none;
    background-color: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.menu-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.1rem 1.5rem;
    border-bottom: 1px solid rgba(44, 44, 44, 0.06);
    transition: background-color var(--transition);
}

.menu-item:last-child {
    border-bottom: none;
}

.menu-item:hover {
    background-color: rgba(188, 45, 41, 0.03);
}

.menu-item--featured {
    border-left: 3px solid var(--accent-color);
}

.menu-num {
    flex-shrink: 0;
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent-color);
    background-color: rgba(188, 45, 41, 0.08);
    width: 2.4rem;
    height: 2.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    letter-spacing: 0;
}

.menu-item-body {
    flex: 1;
    min-width: 0;
}

.menu-name {
    display: block;
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--text-color);
    margin-bottom: 0.2rem;
}

.menu-desc {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.menu-price {
    flex-shrink: 0;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent-color);
    white-space: nowrap;
    padding-top: 0.1rem;
}

.menu-allergy {
    text-align: center;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 3rem;
    padding: 1rem 1.5rem;
    background-color: rgba(44, 44, 44, 0.04);
    border-radius: 6px;
    line-height: 1.7;
}

/* ==========================================
   7. 在线预约
   ========================================== */
#reservation {
    padding: 7rem 0;
    background-color: #f5f2ea;
}

.reservation-intro {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: -1.5rem auto 2.5rem;
    max-width: 480px;
    line-height: 1.7;
}

.reservation-form {
    max-width: 640px;
    margin: 0 auto;
    text-align: left;
    background-color: var(--card-bg);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(44, 44, 44, 0.06);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-color);
    letter-spacing: 0.03em;
}

.form-group input {
    width: 100%;
    padding: 0.85rem 1rem;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    color: var(--text-color);
    background-color: var(--bg-color);
    border: 1px solid rgba(44, 44, 44, 0.12);
    border-radius: 6px;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input::placeholder {
    color: rgba(107, 101, 96, 0.65);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(188, 45, 41, 0.12);
}

.form-group input:invalid:not(:placeholder-shown) {
    border-color: rgba(188, 45, 41, 0.5);
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-top: 0.15rem;
}

.btn-submit {
    width: 100%;
    margin-top: 0.5rem;
    border: none;
    cursor: pointer;
    font-family: var(--font-sans);
}

/* ==========================================
   8. 营业信息
   ========================================== */
#info {
    padding: 7rem 0;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 960px;
    margin: 0 auto;
    text-align: left;
}

.info-card {
    background-color: var(--card-bg);
    padding: 2.75rem 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(44, 44, 44, 0.06);
    transition: box-shadow var(--transition), transform var(--transition);
}

.info-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.info-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background-color: rgba(188, 45, 41, 0.08);
    color: var(--accent-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.info-card h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    letter-spacing: 0.03em;
}

.info-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    line-height: 1.7;
}

.info-card strong {
    color: var(--text-color);
    font-weight: 600;
}

.info-link {
    display: inline-block;
    margin-top: 1rem;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--accent-color);
    text-decoration: none;
    transition: opacity var(--transition);
}

.info-link:hover {
    opacity: 0.75;
}

.info-contact-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
    text-decoration: none;
    margin-bottom: 0.75rem;
    transition: color var(--transition);
}

.info-contact-link:hover {
    color: var(--accent-color);
}

.info-contact-link--whatsapp {
    color: #25D366;
    font-weight: 500;
    font-size: 0.95rem;
}

.info-contact-link--whatsapp:hover {
    color: #1da851;
}

.info-card--instagram {
    text-align: center;
}

.info-card--instagram .info-icon {
    margin-left: auto;
    margin-right: auto;
}

.instagram-qr-link {
    display: block;
    margin: 0 auto 1rem;
    max-width: 150px;
}

.instagram-qr {
    width: 100%;
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
}

.instagram-qr-link:hover .instagram-qr {
    transform: scale(1.03);
    box-shadow: var(--shadow-md);
}

.info-card--instagram .info-link {
    margin-top: 0;
}

.map-wrap {
    margin-top: 3rem;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(44, 44, 44, 0.06);
    aspect-ratio: 16 / 7;
}

.map-wrap iframe {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

/* ==========================================
   9. 页脚
   ========================================== */
footer {
    text-align: center;
    padding: 3rem 2rem;
    background-color: var(--text-color);
    color: rgba(255, 255, 255, 0.45);
    font-size: 0.85rem;
}

.footer-brand {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.75);
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
}

.footer-address {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.82rem;
    margin-bottom: 0.75rem;
}

.footer-contact {
    margin-bottom: 0.75rem;
    font-size: 0.85rem;
}

.footer-contact a {
    color: rgba(255, 255, 255, 0.55);
    text-decoration: none;
    transition: color var(--transition);
}

.footer-contact a:hover {
    color: rgba(255, 255, 255, 0.85);
}

.footer-contact span {
    margin: 0 0.5rem;
    color: rgba(255, 255, 255, 0.25);
}

.fab-nav {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 52px;
    height: 52px;
    background-color: var(--accent-color);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(188, 45, 41, 0.45);
    z-index: 150;
    transition: background-color var(--transition), transform var(--transition);
}

.fab-nav:hover {
    background-color: var(--accent-hover);
    transform: scale(1.08);
}

/* ==========================================
   10. 响应式
   ========================================== */
@media (max-width: 768px) {
    .header-inner {
        padding: 1rem 1.25rem;
        grid-template-columns: 1fr auto;
        gap: 0;
        position: relative;
    }

    .logo {
        grid-column: 1;
        font-size: 1.45rem;
    }

    .nav-toggle-label {
        display: flex;
        grid-column: 2;
    }

    .header-cta {
        display: none;
    }

    .site-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: rgba(44, 44, 44, 0.98);
        padding: 1rem 1.25rem 1.5rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        gap: 0.15rem;
        grid-column: 1 / -1;
        justify-self: stretch;
    }

    .site-nav a {
        font-size: 0.9rem !important;
        padding: 0.85rem 0.5rem !important;
        width: 100%;
        letter-spacing: 0.08em;
    }

    .site-nav a::after {
        display: none;
    }

    .nav-cta-mobile {
        display: block;
        margin-top: 0.75rem;
        text-align: center;
        background-color: var(--accent-color);
        color: #ffffff !important;
        border-radius: 999px;
        padding: 0.85rem 1rem !important;
    }

    .nav-toggle-input:checked ~ .site-nav {
        display: flex;
    }

    .nav-toggle-input:checked + .nav-toggle-label span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle-input:checked + .nav-toggle-label span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle-input:checked + .nav-toggle-label span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    #hero {
        height: 75vh;
        background-attachment: scroll;
    }

    #story,
    #menu,
    #reservation,
    #info {
        padding: 5rem 0;
    }

    .reservation-form {
        padding: 1.75rem 1.25rem;
    }

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

    .info-grid {
        grid-template-columns: 1fr;
    }

    .menu-item {
        flex-wrap: wrap;
        gap: 0.5rem 1rem;
    }

    .menu-price {
        margin-left: 3.4rem;
    }

    .map-wrap {
        aspect-ratio: 4 / 3;
    }
}

@media (max-width: 480px) {
    .hero-tagline br {
        display: none;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 260px;
        text-align: center;
    }
}