:root {
    /* 调色板，在这里更改配色 */
    --md-sys-color-primary: #FFCE00; /* 强调色：亮金黄 */
    --md-sys-color-on-primary: #312700;
    --md-sys-color-primary-container: #F2DC96;
    --md-sys-color-on-primary-container: #1F1600;
    --md-sys-color-secondary: #5F5129;
    --md-sys-color-on-secondary: #FFFFFF;
    --md-sys-color-secondary-container: #E6D49D;
    --md-sys-color-on-secondary-container: #1F1600;
    --md-sys-color-surface: #F7F1E2;
    --md-sys-color-on-surface: #19160F;
    --md-sys-color-surface-variant: #E6DBC2;
    --md-sys-color-surface-container: #EFE4CB;
    --md-sys-color-outline: #75695C;
    --md-sys-color-surface-container-high: #F0E1B5;
    --deep-orange: #9B4700;
    --deep-orange-hover: #7F3900;
    --deep-orange-soft: #F3D9C6;
    --page-accent-glow: radial-gradient(circle at top left, rgba(255, 206, 0, 0.28), transparent 40%), radial-gradient(circle at top right, rgba(155, 71, 0, 0.22), transparent 34%);
    --page-flow-streak: linear-gradient(120deg, rgba(255, 255, 255, 0.03) 10%, rgba(255, 211, 107, 0.2) 30%, rgba(255, 236, 166, 0.14) 46%, rgba(255, 255, 255, 0.03) 64%);
    --ambient-flow-duration: 14s;
    --ambient-sweep-duration: 22s;
    --card-shadow-soft: 0 4px 12px rgba(65, 53, 18, 0.06);
    --card-shadow-hover: 0 10px 28px rgba(65, 53, 18, 0.16);
    --card-spotlight-core: 0.46;
    --card-spotlight-edge: 0.18;
    --card-tint-opacity: 0.06;
    --spot-size: 72px;
    --spot-core-alpha: 0;
    --spot-edge-alpha: 0;
    --spot-tint-alpha: 0;
    --spot-opacity: 0;
    --theme-transition-duration: 0.45s;
    --ambient-canvas-opacity: 0.92;
    --ambient-glow-color: #FFCE00;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html[data-theme='dark'] {
    --md-sys-color-primary: #FFB08A;
    --md-sys-color-on-primary: #5A1B00;
    --md-sys-color-primary-container: #7A2F0D;
    --md-sys-color-on-primary-container: #FFDCCF;
    --md-sys-color-secondary: #E7B7A3;
    --md-sys-color-on-secondary: #452117;
    --md-sys-color-secondary-container: #5E372B;
    --md-sys-color-on-secondary-container: #FFDCD1;
    --md-sys-color-surface: #18110F;
    --md-sys-color-on-surface: #F3DFD8;
    --md-sys-color-surface-variant: #55413A;
    --md-sys-color-surface-container: #241917;
    --md-sys-color-surface-container-high: #30211D;
    --md-sys-color-outline: #9D847A;
    --deep-orange: #FF9A62;
    --deep-orange-hover: #FFBE91;
    --deep-orange-soft: rgba(255, 154, 98, 0.16);
    --page-accent-glow: radial-gradient(circle at top left, rgba(255, 176, 138, 0.24), transparent 42%), radial-gradient(circle at top right, rgba(122, 47, 13, 0.34), transparent 34%);
    --page-flow-streak: linear-gradient(120deg, rgba(255, 255, 255, 0.02) 12%, rgba(255, 176, 138, 0.15) 34%, rgba(122, 47, 13, 0.2) 54%, rgba(255, 255, 255, 0.02) 72%);
    --card-shadow-soft: 0 4px 14px rgba(0, 0, 0, 0.12);
    --card-shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.28);
    --card-spotlight-core: 0.2;
    --card-spotlight-edge: 0.07;
    --card-tint-opacity: 0.032;
    --ambient-canvas-opacity: 0.97;
}

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

html {
    scroll-behavior: smooth;
}

[id] {
    scroll-margin-top: 80px;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--theme-transition-duration) ease, color var(--theme-transition-duration) ease;
}

.ambient-glow-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: var(--ambient-canvas-opacity);
    filter: blur(8px);
    transition: opacity var(--theme-transition-duration) ease;
}

header,
section,
footer {
    position: relative;
    z-index: 1;
}

@media (prefers-reduced-motion: reduce) {
    .ambient-glow-canvas {
        opacity: calc(var(--ambient-canvas-opacity) * 0.72);
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 24px;
}

/* 占位图通用样式 */
.placeholder-img {
    background-color: #ffffff;
    border: 1px solid var(--md-sys-color-outline);
    display: block;
    object-fit: cover;
}

/* 导航栏 */
.top-app-bar {
    height: 64px;
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    width: 100%;
    background-color: color-mix(in srgb, var(--md-sys-color-surface) 82%, transparent);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: background-color var(--theme-transition-duration) ease, box-shadow var(--theme-transition-duration) ease;
}

.top-app-bar.scrolled {
    background-color: var(--md-sys-color-primary-container);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.top-app-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand {
    font-size: 24px;
    font-weight: 700;
    color: var(--deep-orange);
    text-decoration: none;
    transition: color var(--theme-transition-duration) ease;
}

.nav-links a {
    text-decoration: none;
    color: var(--md-sys-color-on-surface);
    margin: 0 16px;
    font-weight: 500;
    position: relative;
    overflow: hidden;
    display: inline-block;
    padding: 8px 12px;
    border-radius: 12px;
    transition: color var(--theme-transition-duration) ease, background-color var(--theme-transition-duration) ease;
}

.nav-links a:hover {
    background-color: color-mix(in srgb, var(--md-sys-color-primary-container) 68%, transparent);
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-width: 126px;
    height: 42px;
    padding: 0 16px;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--md-sys-color-outline) 54%, transparent);
    background: color-mix(in srgb, var(--md-sys-color-primary-container) 72%, var(--md-sys-color-surface));
    color: var(--md-sys-color-on-surface);
    box-shadow: 0 4px 12px rgba(65, 53, 18, 0.12);
    transition: background-color var(--theme-transition-duration) ease, color var(--theme-transition-duration) ease, border-color var(--theme-transition-duration) ease, box-shadow var(--theme-transition-duration) ease, transform 0.28s cubic-bezier(0.2, 0, 0, 1);
}

.theme-toggle:hover {
    transform: translateY(-1px);
}

.theme-toggle .material-symbols-outlined {
    margin-right: 0;
    font-size: 22px;
}

.theme-toggle-text {
    font-size: 14px;
    font-weight: 500;
}

.glow-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 42px;
    padding: 0 14px;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--md-sys-color-outline) 54%, transparent);
    background: color-mix(in srgb, var(--md-sys-color-primary-container) 72%, var(--md-sys-color-surface));
    color: var(--md-sys-color-on-surface);
    box-shadow: 0 4px 12px rgba(65, 53, 18, 0.12);
    transition: background-color var(--theme-transition-duration) ease, color var(--theme-transition-duration) ease, border-color var(--theme-transition-duration) ease, box-shadow var(--theme-transition-duration) ease, transform 0.28s cubic-bezier(0.2, 0, 0, 1);
    cursor: pointer;
}

.glow-toggle:hover {
    transform: translateY(-1px);
}

.glow-toggle .material-symbols-outlined {
    font-size: 22px;
}

.glow-toggle-text {
    font-size: 14px;
    font-weight: 500;
}

html[data-glow='off'] .ambient-glow-canvas {
    opacity: 0;
    transition: opacity 0.6s ease;
}

/* 按钮样式和可点击元素 */
button,
.nav-links a {
    position: relative;
    overflow: hidden;
}

.btn-filled {
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    border: none;
    padding: 12px 24px;
    border-radius: 100px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--theme-transition-duration) ease, color var(--theme-transition-duration) ease, box-shadow var(--theme-transition-duration) ease, border-color var(--theme-transition-duration) ease, opacity 0.3s ease, transform 0.3s ease;
}

.btn-filled:hover {
    box-shadow: 0 4px 8px rgba(88, 74, 20, 0.3);
    opacity: 0.9;
}

.contact-btns {
    display: flex;
    justify-content: center;
    gap: 24px;
    align-items: center;
}

.contact-btns .btn-tonal {
    background: transparent;
    color: var(--deep-orange);
    border: 2px solid var(--deep-orange);
}

.contact-btns .btn-tonal:hover {
    background: transparent;
    color: var(--deep-orange-hover);
    border-color: var(--deep-orange-hover);
}

.btn-tonal {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    border: none;
    padding: 12px 24px;
    border-radius: 100px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--theme-transition-duration) ease, color var(--theme-transition-duration) ease, box-shadow var(--theme-transition-duration) ease, border-color var(--theme-transition-duration) ease;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(128, 128, 128, 0.35);
    transform: scale(0);
    opacity: 0.7;
    pointer-events: none;
    animation: ripple-effect 0.4s ease-out;
}

@keyframes ripple-effect {
    to {
        transform: scale(25);
        opacity: 0;
    }
}

/* Hero 区域 */
.hero {
    padding: 140px 0 80px;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.hero h1 {
    font-size: 56px;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
    margin-top: 48px;
}

.text-primary { color: var(--md-sys-color-primary); }

.main-img {
    width: 100%;
    height: 400px;
    border-radius: 28px; /* MD3 Extra Large Corner */
    border: none;
}

/* 卡片与网格 */
.section-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 48px;
}

.content-text {
    text-align: center;
    font-size: 25px;
    margin-bottom: 48px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.services-footer {
    display: flex;
    justify-content: flex-end;
}

.btn-learn-more {
    background-color: transparent;
    color: var(--deep-orange);
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 500;
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    line-height: 1;
    height: fit-content;
}

.btn-learn-more:hover {
    background-color: var(--deep-orange-soft);
    color: var(--deep-orange-hover);
}

.btn-learn-more .arrow {
    margin-left: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
    font-size: 20px;
    line-height: 1;
}

.btn-learn-more:hover .arrow {
    transform: translateX(4px);
}

.card {
    background-color: var(--md-sys-color-surface-variant);
    padding: 32px;
    border-radius: 24px;
    position: relative;
    overflow: hidden;
    will-change: transform;
    --spot-x: 50%;
    --spot-y: 50%;
    --card-shift-x: 0px;
    --card-shift-y: 0px;
    --card-lift: 0px;
    --reveal-y: 0px;
    box-shadow: var(--card-shadow-soft);
    transform: translate(var(--card-shift-x), calc(var(--card-shift-y) + var(--card-lift) + var(--reveal-y)));
    transition: transform 0.28s cubic-bezier(0.2, 0.8, 0.2, 1),
                box-shadow 0.28s cubic-bezier(0.2, 0.8, 0.2, 1),
                background-color var(--theme-transition-duration) ease,
                color var(--theme-transition-duration) ease;
}

.card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    opacity: var(--spot-opacity);
    background: radial-gradient(var(--spot-size) circle at var(--spot-x) var(--spot-y), rgba(255, 255, 255, var(--spot-core-alpha)) 0%, rgba(255, 255, 255, var(--spot-edge-alpha)) 46%, rgba(255, 255, 255, 0) 78%);
    transition: opacity 0.22s ease, background 0.22s ease;
}

.card::after,
.member-card::after,
.stat-card::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    background: var(--md-sys-color-primary);
    opacity: var(--spot-tint-alpha);
    mix-blend-mode: multiply;
    transition: opacity 0.22s ease;
}

.card:hover {
    --card-lift: -8px;
    background-color: var(--md-sys-color-primary-container);
    box-shadow: var(--card-shadow-hover);
}

.card.spotlight-visible::before,
.member-card.spotlight-visible::before,
.stat-card.spotlight-visible::before {
    opacity: var(--spot-opacity);
}

.card.spotlight-visible::after,
.member-card.spotlight-visible::after,
.stat-card.spotlight-visible::after,
.card.is-hovered::after,
.member-card.is-hovered::after,
.stat-card.is-hovered::after {
    opacity: var(--spot-tint-alpha);
}

.card .material-icons-outlined {
    font-size: 40px;
    color: var(--md-sys-color-primary);
    margin-bottom: 16px;
}

.card,
.member-card,
.section-title,
.content-text,
.hero h1,
.hero p,
.placeholder-img,
.contact,
.modal,
.modal-title,
.modal-content,
.modal-btn-a,
.modal-btn-b {
    transition: background-color var(--theme-transition-duration) ease, color var(--theme-transition-duration) ease, border-color var(--theme-transition-duration) ease, box-shadow var(--theme-transition-duration) ease, opacity 0.6s ease, transform 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* 团队成员 */
.team { padding: 80px 0; }

.member-card {
    text-align: center;
    border-radius: 24px;
    padding: 20px 16px;
    position: relative;
    overflow: hidden;
    will-change: transform;
    --spot-x: 50%;
    --spot-y: 50%;
    --card-shift-x: 0px;
    --card-shift-y: 0px;
    --card-lift: 0px;
    --reveal-y: 0px;
    box-shadow: var(--card-shadow-soft);
    transform: translate(var(--card-shift-x), calc(var(--card-shift-y) + var(--card-lift) + var(--reveal-y)));
    transition: transform 0.28s cubic-bezier(0.2, 0.8, 0.2, 1),
                box-shadow 0.28s cubic-bezier(0.2, 0.8, 0.2, 1),
                background-color var(--theme-transition-duration) ease,
                color var(--theme-transition-duration) ease;
}

.member-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    opacity: var(--spot-opacity);
    background: radial-gradient(var(--spot-size) circle at var(--spot-x) var(--spot-y), rgba(255, 255, 255, var(--spot-core-alpha)) 0%, rgba(255, 255, 255, var(--spot-edge-alpha)) 42%, rgba(255, 255, 255, 0) 76%);
    transition: opacity 0.22s ease, background 0.22s ease;
}

.member-card:hover {
    --card-lift: -6px;
    background-color: rgba(242, 220, 150, 0.72);
    box-shadow: var(--card-shadow-hover);
}

.avatar {
    width: 160px;
    height: 160px;
    border-radius: 80px;
    margin-bottom: 16px;
    transition: transform 0.28s cubic-bezier(0.2, 0.8, 0.2, 1),
                box-shadow 0.28s cubic-bezier(0.2, 0.8, 0.2, 1),
                background-color 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.member-card:hover .avatar,
.avatar:hover {
    transform: scale(1.08);
    box-shadow: 0 12px 24px rgba(65, 53, 18, 0.28);
}

@media (hover: none) {
    .card::before,
    .member-card::before,
    .stat-card::before {
        display: none;
    }
}

.footer {
    text-align: center;
    padding: 40px;
    background-color: var(--md-sys-color-surface-variant);
    margin-top: 80px;
    transition: background-color var(--theme-transition-duration) ease, color var(--theme-transition-duration) ease;
}


.material-symbols-outlined {
  font-variation-settings:
  'FILL' 0,
  'wght' 400,
  'GRAD' 0,
  'opsz' 48;
  font-size: 40px;
}


/* 移动端适配 */
@media (max-width: 768px) {
    .hero .container { grid-template-columns: 1fr; text-align: center; }
    .nav-links { display: none; }
    .nav-actions { gap: 0; }
    .theme-toggle { min-width: 42px; width: 42px; padding: 0; justify-content: center; }
    .theme-toggle-text { display: none; }
    .glow-toggle { min-width: 42px; width: 42px; padding: 0; justify-content: center; }
    .glow-toggle-text { display: none; }
    .hero h1 { font-size: 36px; }
    .hero-btns { justify-content: center; }
}

.contact{
    padding: 10%;
    background-color: var(--md-sys-color-primary-container);
}

/* 弹窗样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.38s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.modal-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background: var(--md-sys-color-surface-container-high);
    border-radius: 28px;
    padding: 32px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 8px 32px rgba(128, 128, 128, 0.3);
    text-align: center;
    transform: scale(0.8);
    opacity: 0;
    transition: transform 0.38s cubic-bezier(0.2, 0.8, 0.2, 1),
                opacity 0.38s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.modal-overlay.show .modal {
    transform: scale(1);
    opacity: 1;
}

.modal-title {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 16px;
    color: var(--md-sys-color-on-surface);
}

.modal-content {
    font-size: 16px;
    margin-bottom: 24px;
    color: var(--md-sys-color-on-surface);
}

.modal-buttons {
    display: flex;
    gap: 16px;
    justify-content: flex-end;
    align-items: flex-end;
}

.modal-btn-a {
    background: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    border: 2px solid var(--md-sys-color-primary);
    padding: 12px 24px;
    border-radius: 100px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.modal-btn-b {
    background: transparent;
    color: var(--deep-orange);
    border: 2px solid var(--deep-orange);
    padding: 12px 24px;
    border-radius: 100px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.modal-btn-b:hover {
    background: var(--deep-orange-soft);
    color: var(--deep-orange-hover);
    border-color: var(--deep-orange-hover);
}