:root {
    /* 品牌色彩系统 (高端商务极简风) */
    --bg-main: #F7F5F0;
    /* 天然暖白 */
    --bg-sec: #E8E4DB;
    /* 浅沙灰 */
    --bg-card: #FFFFFF;
    /* 纯白色 */
    --gold: #C5A880;
    /* 拉丝黄铜金 */
    --gold-hover: #B5966D;
    --gold-gradient: linear-gradient(135deg, #EAD6A5 0%, #C5A880 50%, #9E794A 100%);
    --dark: #1E1E1E;
    /* 曜石黑 */
    --text-sec: #6A665D;
    /* 辅助文字灰褐 */

    /* 排版系统 */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-serif: 'Playfair Display', serif;

    /* 间距与圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --section-padding: 100px 5%;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 胶片噪点蒙版 (Film Grain Texture) */
.noise-overlay {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    pointer-events: none;
    z-index: 9999;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.05;
    mix-blend-mode: overlay;
    animation: noise-anim 0.2s infinite steps(1);
}

@keyframes noise-anim {
    0% {
        transform: translate(0, 0);
    }

    10% {
        transform: translate(-5%, -5%);
    }

    20% {
        transform: translate(-15%, 5%);
    }

    30% {
        transform: translate(7%, -25%);
    }

    40% {
        transform: translate(-5%, 25%);
    }

    50% {
        transform: translate(-15%, 10%);
    }

    60% {
        transform: translate(15%, 0%);
    }

    70% {
        transform: translate(0%, 15%);
    }

    80% {
        transform: translate(3%, 35%);
    }

    90% {
        transform: translate(-10%, 10%);
    }

    100% {
        transform: translate(0, 0);
    }
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* 布局公用类 */
.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* 文本渐变工具类 */
.text-gold-gradient {
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* 电影级文字揭示动画 */
.char-wrap {
    display: inline-block;
    overflow: hidden;
    vertical-align: top;
}

.char {
    display: inline-block;
    transform: translateY(100%);
    opacity: 0;
    animation: split-reveal 0.8s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

@keyframes split-reveal {
    0% {
        transform: translateY(100%);
        opacity: 0;
    }

    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

/* 电影级首屏入场 */
@keyframes cinematic-fade-in {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.cinematic-fade {
    opacity: 0;
    transform: translateY(20px);
    animation: cinematic-fade-in 1s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

.hero-badge.cinematic-fade {
    animation-delay: 0.1s;
}

.hero-desc.cinematic-fade {
    animation-delay: 1.0s;
}

.hero-actions.cinematic-fade {
    animation-delay: 1.2s;
}

.cinematic-fade-indicator {
    opacity: 0;
    animation: fade-in-indicator 1s 1.8s forwards !important;
}

@keyframes fade-in-indicator {
    to {
        opacity: 0.7;
    }
}

/* 向上揭示动画类 */
.reveal-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: opacity, transform;
}

.reveal-up.reveal-active {
    opacity: 1;
    transform: translateY(0);
}


.section-title-wrap {
    text-align: center;
    margin-bottom: 60px;
}

.section-subtitle {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.section-title {
    font-size: 40px;
    font-weight: 400;
    font-family: var(--font-serif);
}

.btn-primary {
    display: inline-block;
    padding: 16px 36px;
    background: var(--dark);
    color: var(--bg-card);
    font-size: 15px;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.btn-primary:hover {
    background: var(--gold);
    color: var(--bg-card);
}


/* 7. 联系与留资 (Contact) */
.contact {
    padding: var(--section-padding);
    background: var(--dark);
    color: var(--bg-card);
}

.contact-wrap {
    display: flex;
    gap: 80px;
    max-width: 1200px;
    margin: 0 auto;
}

.contact-info {
    flex: 1;
}

.contact-info .section-subtitle,
.contact-info .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.info-list {
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.info-item h5 {
    font-size: 14px;
    color: var(--gold);
    letter-spacing: 1px;
    margin-bottom: 4px;
    text-transform: uppercase;
}

.info-item p {
    font-size: 16px;
    opacity: 0.9;
}

.contact-form {
    flex: 1;
    background: #2A2A2A;
    padding: 50px;
    border-radius: 4px;
    border-top: 4px solid var(--gold);
}

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

.form-label {
    display: block;
    font-size: 13px;
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.7);
}

.form-input {
    width: 100%;
    padding: 16px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--bg-card);
    font-family: var(--font-sans);
    font-size: 15px;
    outline: none;
    transition: border 0.3s;
}

.form-input:focus {
    border-color: var(--gold);
}

textarea.form-textarea {
    resize: vertical;
    min-height: 100px;
    line-height: 1.6;
}

.custom-select-wrapper {
    position: relative;
    width: 100%;
}

select.custom-select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.7)' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
    cursor: pointer;
}

select.custom-select option {
    background-color: var(--dark);
    color: var(--bg-card);
    padding: 12px;
}

select.custom-select:required:invalid {
    color: rgba(255, 255, 255, 0.5);
}


.btn-submit {
    width: 100%;
    background: var(--gold-gradient);
    color: var(--dark);
    border: none;
    padding: 18px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    border-radius: 2px;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(197, 168, 128, 0.2);
}