/* =============================================================
   摄影师主页 — 样式
   Design System: Editorial / Minimalist · 暖白底 + 香槟金点缀
   ============================================================= */

/* ========== Design Tokens ========== */
:root {
    --color-bg: #FAF8F5;
    --color-text: #1A1A1A;
    --color-text-muted: #8B8B8B;
    --color-text-light: #B8B8B8;
    --color-accent: #C8A46B;
    --color-accent-hover: #B8923E;
    --color-surface: #F0EDE8;
    --color-border: #E5E1DA;
    --color-nav-bg: rgba(250, 248, 245, 0.92);
    --color-hero-overlay: rgba(0, 0, 0, 0.35);

    --font-serif: 'Playfair Display', 'Georgia', serif;
    --font-sans: 'Inter', -apple-system, 'Helvetica Neue', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    --radius: 2px;
    --transition: 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-fast: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ========== Reset & Base ========== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-sans);
    font-weight: 300;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
img {
    display: block;
    max-width: 100%;
    height: auto;
}
a {
    text-decoration: none;
    color: inherit;
}
ul {
    list-style: none;
}

/* ========== Navigation ========== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.5rem var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: transparent;
    opacity: 0;
    transform: translateY(-100%);
    transition: opacity 0.8s ease,
                transform 0.8s ease,
                background var(--transition),
                padding var(--transition),
                box-shadow var(--transition);
}
.nav--visible {
    opacity: 1;
    transform: translateY(0);
}
.nav--scrolled {
    background: var(--color-nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 0.9rem var(--spacing-md);
    box-shadow: 0 1px 0 var(--color-border);
}
.nav__logo {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 600;
    letter-spacing: 0.05em;
}
.nav__links {
    display: flex;
    gap: 2.5rem;
}
.nav__link {
    font-size: 0.8rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    cursor: pointer;
    position: relative;
}
.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width var(--transition);
}
.nav__link:hover {
    color: var(--color-text);
}
.nav__link:hover::after {
    width: 100%;
}
.nav--scrolled .nav__link {
    color: var(--color-text-muted);
}
.nav--scrolled .nav__link:hover {
    color: var(--color-text);
}

/* Mobile nav toggle */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    background: none;
    border: none;
}
.nav__toggle span {
    display: block;
    width: 24px;
    height: 1.5px;
    background: var(--color-text);
    transition: var(--transition-fast);
}
.nav__toggle--active span:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
}
.nav__toggle--active span:nth-child(2) {
    opacity: 0;
}
.nav__toggle--active span:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
}

@media (max-width: 768px) {
    .nav__toggle {
        display: flex;
    }
    .nav__links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2.5rem;
        background: var(--color-bg);
        transition: right var(--transition);
        box-shadow: -10px 0 40px rgba(0, 0, 0, 0.05);
    }
    .nav__links--open {
        right: 0;
    }
    .nav__link {
        font-size: 1rem;
    }
}

/* ========== Hero ========== */
.hero {
    position: relative;
    height: 100vh;
    width: 100%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero__bg {
    position: absolute;
    inset: 0;
    background: #2a2a2a;
}
.hero__bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.hero__overlay {
    position: absolute;
    inset: 0;
    background: var(--color-hero-overlay);
}
.hero__content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    padding: var(--spacing-md);
    opacity: 0;
    transform: translateY(30px);
    animation: heroFadeIn 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.3s forwards;
}
@keyframes heroFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.hero__name {
    font-family: var(--font-serif);
    font-size: clamp(2.8rem, 7vw, 6.5rem);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: 0.03em;
    margin-bottom: 0.5rem;
}
.hero__tagline {
    font-size: clamp(0.95rem, 1.3vw, 1.25rem);
    font-weight: 300;
    letter-spacing: 0.15em;
    color: rgba(255, 255, 255, 0.75);
    text-transform: uppercase;
}
.hero__scroll {
    position: absolute;
    bottom: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    opacity: 0;
    animation: heroFadeIn 1s ease 1.5s forwards;
}
.hero__scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.5), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
    0%,
    100% {
        transform: scaleY(1);
        opacity: 1;
    }
    50% {
        transform: scaleY(0.6);
        opacity: 0.3;
    }
}

/* ========== Section Shared ========== */
.section {
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: 1280px;
    margin: 0 auto;
}
.section__header {
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.section__header--visible {
    opacity: 1;
    transform: translateY(0);
}
.section__label {
    font-size: 0.72rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 0.8rem;
}
.section__title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-text);
}
.section__title em {
    font-style: italic;
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .section {
        padding: var(--spacing-lg) 1.25rem;
    }
}

/* ========== Featured Works ========== */
.works-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}
.work-card {
    display: block;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    background: var(--color-surface);
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
    color: inherit;
    text-decoration: none;
}
.work-card--visible {
    opacity: 1;
    transform: translateY(0);
}
/* layout variants */
.work-card--featured {
    grid-column: 1 / -1;
}
.work-card--tall {
    grid-row: span 2;
}
.work-card--featured .work-card__image {
    aspect-ratio: 16 / 9;
}
.work-card--default .work-card__image {
    aspect-ratio: 4 / 5;
}
.work-card--tall .work-card__image {
    aspect-ratio: 3 / 4;
}
.work-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.work-card:hover .work-card__image {
    transform: scale(1.05);
}
.work-card__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.5) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 2rem;
}
.work-card:hover .work-card__overlay {
    opacity: 1;
}
.work-card__title {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: #fff;
    margin-bottom: 0.3rem;
    transform: translateY(10px);
    transition: transform var(--transition);
}
.work-card:hover .work-card__title {
    transform: translateY(0);
}
.work-card__category {
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.6);
    transform: translateY(10px);
    transition: transform var(--transition) 0.05s;
}
.work-card:hover .work-card__category {
    transform: translateY(0);
}

@media (max-width: 768px) {
    .works-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .work-card--featured {
        grid-column: 1;
    }
    .work-card--tall {
        grid-row: auto;
    }
    .work-card__overlay {
        opacity: 1;
    }
}

/* ========== About ========== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}
.about-image {
    position: relative;
    overflow: hidden;
    background: var(--color-surface);
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.about-image--visible {
    opacity: 1;
    transform: translateX(0);
}
.about-image img {
    width: 100%;
    aspect-ratio: 3 / 4;
    object-fit: cover;
}
.about-content {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.8s ease, transform 0.8s ease 0.15s;
}
.about-content--visible {
    opacity: 1;
    transform: translateX(0);
}
.about-content__name {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    line-height: 1.2;
    margin-bottom: 0.5rem;
}
.about-content__role {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}
.about-content__bio {
    font-weight: 300;
    color: var(--color-text-muted);
    line-height: 1.9;
    margin-bottom: var(--spacing-md);
}
.about-content__bio p + p {
    margin-top: 1rem;
}
.about-content__detail {
    display: flex;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}
.about-content__detail-label {
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-light);
    margin-bottom: 0.3rem;
}
.about-content__detail-value {
    font-family: var(--font-serif);
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    .about-image img {
        aspect-ratio: 4 / 3;
    }
}

/* ========== Footer ========== */
.footer {
    background: var(--color-text);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-lg) var(--spacing-md);
    margin-top: var(--spacing-2xl, 12rem);
}
.footer__inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}
.footer__brand {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: #fff;
}
.footer__social {
    display: flex;
    gap: 1.8rem;
}
.footer__social a {
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition-fast);
    position: relative;
}
.footer__social a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width var(--transition);
}
.footer__social a:hover {
    color: var(--color-accent);
}
.footer__social a:hover::after {
    width: 100%;
}
.footer__copy {
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.3);
    width: 100%;
    text-align: center;
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

@media (max-width: 640px) {
    .footer__inner {
        flex-direction: column;
        text-align: center;
    }
}

/* ========== Scroll-triggered Reveal (fallback) ========== */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal--visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== Image Fallback ========== */
.img-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    color: var(--color-text-light);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
}
.img-placeholder::after {
    content: attr(data-placeholder);
}