/* ==========================================================================
   苏苏小屋 · 东方雅致女性化高定视觉系统 (Luxury Feminine Oriental Design System)
   色彩：玄墨锦缎底色 + 胭脂落粉 + 流光华金 + 黛青温玉 + 朱砂印章
   ========================================================================== */

:root {
    /* 主色调：玄夜墨青底 */
    --bg-main: #0a0b10;
    --bg-surface: #12141f;
    --bg-card: rgba(20, 22, 34, 0.75);
    --bg-card-hover: rgba(28, 30, 46, 0.9);
    
    /* 东方高定女性化配色体系 */
    --c-rose-light: #fde8ed;
    --c-rose: #f0a8b7;
    --c-rose-deep: #db6e86;
    --c-rose-glow: rgba(240, 168, 183, 0.28);
    
    --c-gold-bright: #fff3d6;
    --c-gold-light: #f5dfa8;
    --c-gold: #dfb76c;
    --c-gold-dark: #ad833a;
    --c-gold-glow: rgba(223, 183, 108, 0.3);
    
    --c-jade: #8ec3b0;
    --c-jade-light: #cbe6dd;
    --c-jade-glow: rgba(142, 195, 176, 0.25);
    
    --c-cinnabar: #c24355;
    --c-cinnabar-light: #e56a7c;
    
    --c-ink: #fcf9f2;
    --c-ink-sub: #d4ccc0;
    --c-ink-muted: #8e8579;
    --c-ink-faint: #575148;
    
    /* 渐变系列 */
    --grad-gold: linear-gradient(135deg, #fff3d6 0%, #f5dfa8 35%, #dfb76c 70%, #b88b42 100%);
    --grad-rose: linear-gradient(135deg, #fff0f3 0%, #f0a8b7 40%, #db6e86 100%);
    --grad-title: linear-gradient(135deg, #ffffff 0%, #fff1d4 30%, #fbd5de 65%, #dfb76c 100%);
    --grad-card: linear-gradient(160deg, rgba(26, 28, 44, 0.85) 0%, rgba(13, 14, 23, 0.92) 100%);
    --grad-btn: linear-gradient(135deg, #fff3d6 0%, #f5dfa8 30%, #dfb76c 75%, #bf8f40 100%);
    
    /* 边框与阴影 */
    --border-gold: rgba(223, 183, 108, 0.22);
    --border-rose: rgba(240, 168, 183, 0.26);
    --border-highlight: rgba(255, 243, 214, 0.5);
    
    --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 25px rgba(223, 183, 108, 0.06);
    --shadow-hover: 0 25px 60px rgba(0, 0, 0, 0.65), 0 0 35px rgba(240, 168, 183, 0.2);
    --shadow-glow: 0 0 30px var(--c-gold-glow);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    
    --ease-silk: cubic-bezier(0.16, 1, 0.3, 1);
}

/* 基础重置与排印 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    color-scheme: dark;
    background: var(--bg-main);
}

body {
    min-height: 100vh;
    font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
    color: var(--c-ink);
    background-color: var(--bg-main);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    letter-spacing: 0.03em;
}

::selection {
    background: rgba(240, 168, 183, 0.38);
    color: #ffffff;
}

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

button, input, select, textarea {
    font-family: inherit;
}

h1, h2, h3, h4, .font-serif {
    font-family: 'Noto Serif SC', 'Songti SC', serif;
    letter-spacing: 0.06em;
}

/* 丝绢与暗墨背景纹理 */
.soft-bg {
    position: fixed;
    inset: 0;
    z-index: -3;
    background:
        radial-gradient(ellipse 80% 60% at 10% 10%, rgba(219, 110, 134, 0.18) 0%, transparent 60%),
        radial-gradient(ellipse 70% 55% at 90% 15%, rgba(223, 183, 108, 0.15) 0%, transparent 60%),
        radial-gradient(ellipse 65% 50% at 50% 90%, rgba(142, 195, 176, 0.12) 0%, transparent 65%),
        linear-gradient(165deg, #11131c 0%, #07080c 45%, #0b0c13 100%);
    pointer-events: none;
}

.soft-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.16;
    background-image: url('../images/ink_texture.webp');
    background-size: 550px;
    mix-blend-mode: soft-light;
    pointer-events: none;
}

/* 东方朱砂印章 (Seals) */
.seal-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: clamp(36px, 5vw, 46px);
    height: clamp(36px, 5vw, 46px);
    border: 1.5px solid var(--c-cinnabar-light);
    border-radius: var(--radius-sm);
    background: radial-gradient(circle, rgba(194, 67, 85, 0.3) 0%, rgba(194, 67, 85, 0.1) 100%);
    color: #ffd8df;
    font-family: 'Noto Serif SC', serif;
    font-size: clamp(1.1rem, 3vw, 1.35rem);
    font-weight: 700;
    box-shadow: 0 4px 18px rgba(194, 67, 85, 0.35), inset 0 0 10px rgba(194, 67, 85, 0.25);
    position: relative;
    user-select: none;
    flex-shrink: 0;
}

.seal-mark::before {
    content: '';
    position: absolute;
    inset: 3px;
    border: 1px dashed rgba(253, 232, 237, 0.35);
    border-radius: 4px;
    pointer-events: none;
}

/* 顶部导航栏 (Navbar) */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.4rem clamp(1.5rem, 6vw, 6.5rem);
    background: linear-gradient(180deg, rgba(8, 9, 13, 0.88) 0%, rgba(8, 9, 13, 0.2) 80%, transparent 100%);
    border-bottom: 1px solid transparent;
    transition: all 0.4s var(--ease-silk);
    backdrop-filter: blur(0px);
}

.navbar.scrolled {
    padding-top: 0.9rem;
    padding-bottom: 0.9rem;
    background: rgba(11, 12, 19, 0.92);
    border-bottom: 1px solid var(--border-gold);
    backdrop-filter: blur(20px) saturate(140%);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
}

.nav-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.9rem;
    text-decoration: none;
}

.nav-brand strong {
    font-size: 1.32rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    background: var(--grad-title);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.nav-brand strong::after {
    content: '✦';
    font-size: 0.7rem;
    color: var(--c-rose);
    opacity: 0.85;
    animation: rose-pulse 3s infinite ease-in-out;
}

@keyframes rose-pulse {
    0%, 100% { transform: scale(0.9); opacity: 0.6; }
    50% { transform: scale(1.25); opacity: 1; filter: drop-shadow(0 0 8px var(--c-rose)); }
}

.nav-brand span {
    font-size: 0.68rem;
    letter-spacing: 0.22em;
    color: var(--c-ink-muted);
    text-transform: uppercase;
    border-left: 1px solid rgba(223, 183, 108, 0.3);
    padding-left: 0.85rem;
    line-height: 1;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: clamp(1.2rem, 2.5vw, 2.8rem);
}

.nav-link {
    color: var(--c-ink-sub);
    font-size: 0.92rem;
    letter-spacing: 0.06em;
    position: relative;
    padding: 0.35rem 0;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 1.5px;
    background: var(--grad-gold);
    box-shadow: 0 0 8px var(--c-gold);
    transition: all 0.35s var(--ease-silk);
    transform: translateX(-50%);
    border-radius: 2px;
}

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

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* 按钮体系：高定流光金与丝绸感 */
.btn-primary, .nav-feedback, .form-submit, .btn-action.edit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.75rem 1.6rem;
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-sm);
    background: var(--grad-btn);
    color: #1a1208;
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    cursor: pointer;
    box-shadow: 0 8px 24px var(--c-gold-glow), inset 0 1px 1px rgba(255, 255, 255, 0.6);
    transition: all 0.35s var(--ease-silk);
    position: relative;
    overflow: hidden;
    user-select: none;
}

.btn-primary::before, .nav-feedback::before, .form-submit::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s ease;
}

.btn-primary:hover::before, .nav-feedback:hover::before, .form-submit:hover::before {
    left: 100%;
}

.btn-primary:hover, .nav-feedback:hover, .form-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(223, 183, 108, 0.45), inset 0 1px 1px #ffffff;
    color: #0d0803;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.75rem 1.6rem;
    border: 1px solid var(--border-gold);
    border-radius: var(--radius-sm);
    background: rgba(223, 183, 108, 0.06);
    color: var(--c-ink);
    font-size: 0.88rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    backdrop-filter: blur(10px);
    transition: all 0.35s var(--ease-silk);
    cursor: pointer;
}

.btn-secondary:hover {
    border-color: var(--c-rose);
    background: rgba(240, 168, 183, 0.12);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 0 25px var(--c-rose-glow);
}

.nav-toggle {
    display: none;
    padding: 0.5rem 0.9rem;
    border: 1px solid var(--border-gold);
    border-radius: var(--radius-sm);
    background: rgba(223, 183, 108, 0.08);
    color: var(--c-gold-light);
    cursor: pointer;
    font-size: 0.85rem;
}

/* 视效粒子与花瓣 */
.mystic-effects {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.particle-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0.85;
}

.cursor-aura {
    position: fixed;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(240, 168, 183, 0.12) 0%, rgba(223, 183, 108, 0.06) 45%, transparent 70%);
    transform: translate(-50%, -50%);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.4s ease;
    mix-blend-mode: screen;
}

body.cursor-active .cursor-aura {
    opacity: 1;
}

.mist-layer {
    position: absolute;
    left: -10vw;
    bottom: 5vh;
    width: 80vw;
    height: 35vh;
    border-radius: 50%;
    background: radial-gradient(ellipse, rgba(219, 110, 134, 0.1) 0%, transparent 65%);
    filter: blur(45px);
    animation: ambient-drift 24s ease-in-out infinite alternate;
}

.mist-layer.mist-two {
    left: 45vw;
    bottom: 30vh;
    background: radial-gradient(ellipse, rgba(223, 183, 108, 0.08) 0%, transparent 65%);
    animation-delay: -12s;
}

@keyframes ambient-drift {
    from { transform: translate3d(0, 0, 0) scale(1); }
    to { transform: translate3d(14vw, -7vh, 0) scale(1.15); }
}

.petal-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.petal {
    position: absolute;
    top: -20px;
    width: 12px;
    height: 16px;
    background: radial-gradient(ellipse at 30% 20%, #fff0f3 0%, #f0a8b7 60%, #db6e86 100%);
    border-radius: 60% 40% 70% 30% / 60% 30% 70% 40%;
    opacity: 0.8;
    filter: drop-shadow(0 2px 5px rgba(219, 110, 134, 0.3));
    animation: petal-fall var(--petal-duration, 16s) linear infinite;
    animation-delay: var(--petal-delay, 0s);
}

@keyframes petal-fall {
    0% { transform: translateY(-20px) translateX(0) rotate(0deg) scale(0.8); opacity: 0; }
    10% { opacity: 0.9; }
    90% { opacity: 0.85; }
    100% { transform: translateY(105vh) translateX(var(--petal-sway, 120px)) rotate(540deg) scale(1.05); opacity: 0; }
}

.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.8s var(--ease-silk), transform 0.8s var(--ease-silk);
}

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

/* 标语修饰 Kicker */
.section-kicker, .eyebrow, .modal-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    color: var(--c-gold);
}

.section-kicker::before, .eyebrow::before {
    content: '';
    display: inline-block;
    width: 26px;
    height: 1px;
    background: var(--grad-gold);
}

/* 优雅滚动条 */
::-webkit-scrollbar {
    width: 7px;
    height: 7px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: rgba(223, 183, 108, 0.25);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(240, 168, 183, 0.45);
}