/* ============================================
   富力堂装饰 - 官网样式 v2
   设计风格：极简奢华 · 杂志感 · 设计感
   配色：墨黑 + 香槟金 + 暖白
   ============================================ */

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

:root {
    --color-ink: #0d0d0d;
    --color-ink-soft: #1a1a1a;
    --color-ink-light: #2a2a2a;
    --color-gold: #c9a96e;
    --color-gold-dark: #b8965a;
    --color-gold-light: #e8d5b0;
    --color-gold-glow: rgba(201, 169, 110, 0.15);
    --color-text: #2d2d2d;
    --color-text-muted: #888;
    --color-bg: #faf9f7;
    --color-bg-warm: #f5f2ed;
    --color-bg-dark: #0d0d0d;
    --color-white: #ffffff;
    --color-line: rgba(0, 0, 0, 0.08);
    --color-line-light: rgba(255, 255, 255, 0.1);
    --serif: "Noto Serif SC", "STSong", "SimSun", serif;
    --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    --transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    --transition-slow: all 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    --max-width: 1200px;
}

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

body {
    font-family: var(--sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 40px;
}

.section {
    padding: 140px 0;
    position: relative;
    overflow: hidden;
}

/* ===== 背景大数字 ===== */
.section-bg-number {
    position: absolute;
    top: 60px;
    right: -20px;
    font-family: var(--serif);
    font-size: 22rem;
    font-weight: 900;
    color: rgba(201, 169, 110, 0.04);
    line-height: 1;
    z-index: 0;
    pointer-events: none;
    user-select: none;
}

/* ===== Section Header ===== */
.section-header-center {
    text-align: center;
    margin-bottom: 80px;
    position: relative;
    z-index: 1;
}

.section-label {
    font-size: 0.75rem;
    letter-spacing: 6px;
    color: var(--color-gold);
    text-transform: uppercase;
    margin-bottom: 16px;
    font-weight: 500;
}

.section-title-large {
    font-family: var(--serif);
    font-size: 3.2rem;
    color: var(--color-ink);
    font-weight: 700;
    letter-spacing: 4px;
    line-height: 1.3;
}

.section-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-top: 16px;
    letter-spacing: 1px;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-block;
    padding: 16px 44px;
    font-size: 0.9rem;
    letter-spacing: 2px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    font-family: var(--sans);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--color-gold);
    color: var(--color-white);
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: left 0.5s ease;
}

.btn-primary:hover::after {
    left: 100%;
}

.btn-primary:hover {
    background: var(--color-gold-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(201, 169, 110, 0.3);
}

.btn-ghost {
    background: transparent;
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-ghost:hover {
    border-color: var(--color-gold);
    color: var(--color-gold);
}

.btn-full {
    width: 100%;
    text-align: center;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 24px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(13, 13, 13, 0.92);
    backdrop-filter: blur(16px);
    padding: 16px 0;
    border-bottom: 1px solid var(--color-line-light);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-white);
}

.logo-mark {
    font-family: var(--serif);
    font-size: 0.7rem;
    letter-spacing: 2px;
    color: var(--color-ink);
    background: var(--color-gold);
    padding: 4px 8px;
    font-weight: 700;
}

.logo-text {
    font-family: var(--serif);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    gap: 40px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.88rem;
    letter-spacing: 1px;
    position: relative;
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 1px;
    background: var(--color-gold);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 24px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-gold);
}

.nav-phone {
    display: flex;
    align-items: center;
}

.phone-btn {
    color: var(--color-white);
    padding: 10px 24px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.85rem;
    letter-spacing: 1px;
    font-family: var(--sans);
}

.phone-btn:hover {
    border-color: var(--color-gold);
    color: var(--color-gold);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    width: 26px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) { opacity: 0; }

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ===== Hero ===== */
.hero {
    height: 100vh;
    min-height: 650px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    background: var(--color-ink);
}

.hero-bg-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 1;
}

.hero-glow {
    position: absolute;
    width: 800px;
    height: 800px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, var(--color-gold-glow) 0%, transparent 60%);
    z-index: 1;
    animation: glowPulse 6s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 2;
    color: var(--color-white);
    animation: heroFadeIn 1.5s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes heroFadeIn {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-line-top {
    width: 40px;
    height: 1px;
    background: var(--color-gold);
    margin: 0 auto 32px;
}

.hero-subtitle {
    font-size: 0.8rem;
    letter-spacing: 8px;
    color: var(--color-gold);
    margin-bottom: 28px;
    font-weight: 400;
}

.hero-title {
    font-family: var(--serif);
    font-size: 6rem;
    font-weight: 900;
    letter-spacing: 16px;
    margin-bottom: 0;
    line-height: 1;
}

.title-char {
    display: inline-block;
    animation: charDrop 1s cubic-bezier(0.22, 1, 0.36, 1) backwards;
}

.title-char:nth-child(1) { animation-delay: 0.3s; }
.title-char:nth-child(2) { animation-delay: 0.5s; }
.title-char:nth-child(3) { animation-delay: 0.7s; }

@keyframes charDrop {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-divider {
    width: 60px;
    height: 2px;
    background: var(--color-gold);
    margin: 32px auto;
}

.hero-tagline {
    font-family: var(--serif);
    font-size: 1.4rem;
    color: var(--color-gold-light);
    letter-spacing: 6px;
    margin-bottom: 12px;
    font-weight: 300;
}

.hero-desc {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 3px;
    margin-bottom: 48px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.hero-side-text {
    position: absolute;
    left: 40px;
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
    transform-origin: left center;
    color: rgba(255, 255, 255, 0.2);
    font-size: 0.7rem;
    letter-spacing: 4px;
    z-index: 2;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    text-align: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.7rem;
    letter-spacing: 3px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.scroll-line {
    width: 1px;
    height: 50px;
    background: rgba(255, 255, 255, 0.15);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -50px;
    left: 0;
    width: 1px;
    height: 50px;
    background: var(--color-gold);
    animation: scrollDown 2s infinite;
}

@keyframes scrollDown {
    0% { top: -50px; }
    100% { top: 50px; }
}

/* ===== 关于我们 ===== */
.about {
    background: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 80px;
    align-items: start;
    position: relative;
    z-index: 1;
}

.about-left {
    position: sticky;
    top: 120px;
}

.about-left .section-label {
    margin-bottom: 20px;
}

.section-title-large {
    font-family: var(--serif);
    font-size: 3.2rem;
    color: var(--color-ink);
    font-weight: 700;
    letter-spacing: 4px;
    line-height: 1.3;
}

.about-quote {
    margin-top: 40px;
    padding-left: 24px;
    border-left: 2px solid var(--color-gold);
    position: relative;
}

.quote-mark {
    font-family: var(--serif);
    font-size: 3rem;
    color: var(--color-gold);
    line-height: 0;
    position: absolute;
    top: 20px;
    left: 20px;
    opacity: 0.3;
}

.about-quote p {
    font-family: var(--serif);
    font-size: 1.15rem;
    color: var(--color-ink-light);
    line-height: 1.8;
    font-weight: 400;
}

.about-desc {
    color: var(--color-text-muted);
    margin-bottom: 20px;
    font-size: 0.95rem;
    line-height: 2;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    margin-top: 48px;
    border-top: 1px solid var(--color-line);
    border-left: 1px solid var(--color-line);
}

.feature-item {
    padding: 32px 24px;
    border-right: 1px solid var(--color-line);
    border-bottom: 1px solid var(--color-line);
    transition: var(--transition);
}

.feature-item:hover {
    background: var(--color-bg-warm);
}

.feature-number {
    font-family: var(--serif);
    font-size: 2.8rem;
    color: var(--color-ink);
    font-weight: 700;
    line-height: 1;
}

.feature-number span {
    color: var(--color-gold);
}

.feature-label {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-top: 8px;
    letter-spacing: 1px;
}

/* ===== 设计理念 ===== */
.philosophy {
    background: var(--color-ink);
    position: relative;
}

.philosophy .section-bg-number {
    color: rgba(201, 169, 110, 0.06);
}

.philosophy .section-label {
    color: var(--color-gold);
}

.philosophy .section-title-large {
    color: var(--color-white);
}

.philosophy .section-subtitle {
    color: rgba(255, 255, 255, 0.4);
}

.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--color-line-light);
    border-left: 1px solid var(--color-line-light);
}

.philosophy-card {
    padding: 48px 32px;
    border-right: 1px solid var(--color-line-light);
    border-bottom: 1px solid var(--color-line-light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.philosophy-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0;
    background: linear-gradient(180deg, var(--color-gold-glow) 0%, transparent 100%);
    transition: height 0.6s ease;
}

.philosophy-card:hover::before {
    height: 100%;
}

.philosophy-num {
    font-family: var(--serif);
    font-size: 0.85rem;
    color: var(--color-gold);
    margin-bottom: 24px;
    letter-spacing: 2px;
}

.philosophy-icon {
    font-size: 2.5rem;
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
}

.philosophy-card h3 {
    font-family: var(--serif);
    font-size: 1.3rem;
    color: var(--color-white);
    margin-bottom: 16px;
    font-weight: 600;
    letter-spacing: 2px;
    position: relative;
    z-index: 1;
}

.philosophy-card p {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.9;
    position: relative;
    z-index: 1;
}

/* ===== 服务项目 ===== */
.services {
    background: var(--color-bg);
}

.services-list {
    position: relative;
    z-index: 1;
}

.service-row {
    display: grid;
    grid-template-columns: 80px 1fr 280px;
    gap: 40px;
    align-items: center;
    padding: 36px 0;
    border-bottom: 1px solid var(--color-line);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.service-row::before {
    content: '';
    position: absolute;
    left: -40px;
    top: 0;
    width: 0;
    height: 100%;
    background: var(--color-gold);
    transition: width 0.4s ease;
}

.service-row:hover::before {
    width: 4px;
}

.service-row:hover {
    padding-left: 20px;
}

.service-row:hover .service-number {
    color: var(--color-gold);
}

.service-row:hover h3 {
    color: var(--color-gold);
}

.service-number {
    font-family: var(--serif);
    font-size: 2rem;
    color: var(--color-line);
    font-weight: 700;
    transition: var(--transition);
}

.service-content h3 {
    font-family: var(--serif);
    font-size: 1.5rem;
    color: var(--color-ink);
    margin-bottom: 8px;
    font-weight: 600;
    letter-spacing: 2px;
    transition: var(--transition);
}

.service-content p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.8;
}

.service-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.service-tags span {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    padding: 6px 14px;
    border: 1px solid var(--color-line);
    border-radius: 20px;
    letter-spacing: 1px;
}

/* ===== 案例展示 ===== */
.portfolio {
    background: var(--color-bg-warm);
}

.portfolio-filter {
    display: flex;
    justify-content: center;
    gap: 0;
    margin-bottom: 48px;
    position: relative;
    z-index: 1;
}

.filter-btn {
    padding: 12px 32px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--color-text-muted);
    font-size: 0.88rem;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 2px;
    font-family: var(--sans);
}

.filter-btn:hover {
    color: var(--color-ink);
}

.filter-btn.active {
    color: var(--color-ink);
    border-bottom-color: var(--color-gold);
    font-weight: 500;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

.portfolio-item {
    border-radius: 0;
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.portfolio-item.hidden { display: none; }

.portfolio-image {
    width: 100%;
    height: 360px;
    position: relative;
    overflow: hidden;
}

.portfolio-bg-1 { background: linear-gradient(135deg, #2c2c44 0%, #0d0d0d 100%); }
.portfolio-bg-2 { background: linear-gradient(135deg, #4a3a2c 0%, #1a1208 100%); }
.portfolio-bg-3 { background: linear-gradient(135deg, #1c3a3a 0%, #0a1a1a 100%); }
.portfolio-bg-4 { background: linear-gradient(135deg, #3a4a5c 0%, #1a2230 100%); }
.portfolio-bg-5 { background: linear-gradient(135deg, #3a2c4a 0%, #180a1a 100%); }
.portfolio-bg-6 { background: linear-gradient(135deg, #5c4a2c 0%, #2a1e08 100%); }

.portfolio-bg-1::before, .portfolio-bg-2::before, .portfolio-bg-3::before,
.portfolio-bg-4::before, .portfolio-bg-5::before, .portfolio-bg-6::before {
    content: '🏠';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 4rem;
    opacity: 0.08;
    transition: var(--transition-slow);
}

.portfolio-item:hover .portfolio-image::before {
    opacity: 0.12;
    transform: translate(-50%, -50%) scale(1.2);
}

.portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent 10%, rgba(0, 0, 0, 0.9) 100%);
    padding: 40px 28px 28px;
    transform: translateY(100%);
    transition: var(--transition-slow);
}

.portfolio-item:hover .portfolio-overlay {
    transform: translateY(0);
}

.portfolio-tag {
    display: inline-block;
    font-size: 0.7rem;
    color: var(--color-gold);
    border: 1px solid var(--color-gold);
    padding: 3px 10px;
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.portfolio-info h3 {
    font-family: var(--serif);
    color: var(--color-white);
    font-size: 1.2rem;
    margin-bottom: 6px;
    font-weight: 600;
    letter-spacing: 1px;
}

.portfolio-info p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.82rem;
    letter-spacing: 1px;
}

/* ===== 联系我们 ===== */
.contact {
    background: var(--color-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.contact-info h3 {
    font-family: var(--serif);
    font-size: 1.8rem;
    color: var(--color-ink);
    margin-bottom: 16px;
    font-weight: 600;
    letter-spacing: 2px;
}

.contact-info > p {
    color: var(--color-text-muted);
    margin-bottom: 40px;
    line-height: 2;
}

.contact-items {
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 28px;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--color-line);
}

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

.contact-icon {
    width: 44px;
    height: 44px;
    background: var(--color-bg-warm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: 4px;
    letter-spacing: 2px;
}

.contact-detail a,
.contact-detail span {
    color: var(--color-ink);
    font-size: 0.95rem;
    font-weight: 500;
}

.contact-detail a:hover {
    color: var(--color-gold);
}

.contact-qr {
    margin-top: 32px;
}

.qr-image {
    width: 180px;
    height: auto;
    display: block;
}

.qr-caption {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-top: 10px;
    letter-spacing: 1px;
}

/* 联系表单 */
.contact-form-wrap {
    background: var(--color-ink);
    padding: 48px 40px;
    position: relative;
}

.contact-form-wrap::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 60px;
    height: 60px;
    border-top: 2px solid var(--color-gold);
    border-left: 2px solid var(--color-gold);
}

.contact-form-wrap::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 60px;
    height: 60px;
    border-bottom: 2px solid var(--color-gold);
    border-right: 2px solid var(--color-gold);
}

.contact-form h3 {
    font-family: var(--serif);
    font-size: 1.5rem;
    color: var(--color-white);
    margin-bottom: 8px;
    font-weight: 600;
    letter-spacing: 2px;
}

.form-desc {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.85rem;
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.required { color: var(--color-gold); }

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.03);
    font-size: 0.92rem;
    font-family: var(--sans);
    color: var(--color-white);
    transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.25);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-gold);
    background: rgba(201, 169, 110, 0.05);
}

.form-group select {
    color: rgba(255, 255, 255, 0.7);
}

.form-group select option {
    background: var(--color-ink);
    color: var(--color-white);
}

.form-group textarea { resize: vertical; }

.form-success {
    display: none;
    text-align: center;
    margin-top: 16px;
    padding: 14px;
    background: rgba(201, 169, 110, 0.1);
    color: var(--color-gold);
    font-size: 0.88rem;
    letter-spacing: 1px;
}

.form-success.show {
    display: block;
    animation: heroFadeIn 0.5s ease;
}

/* ===== 地图 ===== */
.map-section {
    margin-top: 60px;
    position: relative;
    z-index: 1;
}

.map-container {
    width: 100%;
    height: 400px;
    background: var(--color-bg-warm);
    border: 1px solid var(--color-line);
}

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

.map-info {
    padding: 24px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.map-info h4 {
    font-family: var(--serif);
    font-size: 1.1rem;
    color: var(--color-ink);
    margin: 0;
    font-weight: 600;
    white-space: nowrap;
}

.map-info p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin: 4px 0 0;
    flex: 1;
}

.map-btn {
    padding: 12px 32px;
    font-size: 0.85rem;
    white-space: nowrap;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--color-ink);
    color: rgba(255, 255, 255, 0.5);
    padding: 80px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo .logo-mark {
    font-size: 0.7rem;
}

.footer-logo span:last-child {
    font-family: var(--serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-white);
    letter-spacing: 2px;
}

.footer-brand p {
    font-size: 0.88rem;
    line-height: 1.9;
    max-width: 320px;
}

.footer-col h4 {
    font-family: var(--serif);
    color: var(--color-white);
    font-size: 1rem;
    margin-bottom: 24px;
    font-weight: 600;
    letter-spacing: 2px;
}

.footer-col ul li {
    margin-bottom: 14px;
}

.footer-col ul li a {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 1px;
}

.footer-col ul li a:hover {
    color: var(--color-gold);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid var(--color-line-light);
    padding: 28px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.3);
    letter-spacing: 1px;
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--color-ink);
    color: var(--color-gold);
    border: 1px solid var(--color-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--color-gold);
    color: var(--color-white);
}

/* ===== 滚动动画 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.9s ease, transform 0.9s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 - 平板 ===== */
@media (max-width: 992px) {
    .section { padding: 90px 0; }

    .section-bg-number { font-size: 14rem; }

    .section-title-large { font-size: 2.4rem; }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-left { position: static; }

    .philosophy-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .service-row {
        grid-template-columns: 60px 1fr;
        gap: 24px;
    }

    .service-tags { display: none; }

    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }

    .hero-title { font-size: 4rem; letter-spacing: 8px; }

    .hero-side-text { display: none; }
}

/* ===== 响应式 - 手机 ===== */
@media (max-width: 768px) {
    .container { padding: 0 24px; }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: rgba(13, 13, 13, 0.98);
        backdrop-filter: blur(16px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 32px;
        transition: right 0.4s ease;
        z-index: 999;
    }

    .nav-menu.active { right: 0; }

    .nav-link { font-size: 1.1rem; }

    .nav-phone { display: none; }

    .hamburger { display: flex; }

    .hero-title { font-size: 3rem; letter-spacing: 4px; }
    .hero-tagline { font-size: 1.1rem; letter-spacing: 2px; }
    .hero-desc { font-size: 0.8rem; }

    .hero-buttons {
        flex-direction: column;
        gap: 12px;
        padding: 0 40px;
    }

    .btn { padding: 14px 36px; font-size: 0.85rem; }

    .section { padding: 60px 0; }

    .section-title-large { font-size: 1.8rem; }

    .section-bg-number { font-size: 8rem; top: 30px; }

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

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

    .portfolio-filter { flex-wrap: wrap; gap: 0; }

    .filter-btn { padding: 10px 20px; font-size: 0.8rem; }

    .about-features { grid-template-columns: 1fr 1fr; }

    .feature-number { font-size: 2.2rem; }

    .contact-form-wrap { padding: 32px 24px; }

    .footer-content { grid-template-columns: 1fr; gap: 32px; }

    .back-to-top { bottom: 20px; right: 20px; width: 42px; height: 42px; }

    .map-info { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2.4rem; }
    .about-features { grid-template-columns: 1fr; }
    .section-title-large { font-size: 1.6rem; }
}