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

:root {
    --color-primary: #e3621c;
    --color-primary-dark: #c14e12;
    --color-secondary: #112438;
    --color-accent: #32b89b;
    --color-success: #2d8a56;
    --color-warning: #cb7a18;
    --color-info: #2f78b7;
    --color-text: #14202b;
    --color-text-light: #526171;
    --color-bg: #f6f8fb;
    --color-surface: #ffffff;
    --color-white: #ffffff;
    --layout-container-max: 1000px;
    --layout-container-padding: 20px;
    --shadow-sm: 0 10px 20px rgba(17, 36, 56, 0.06);
    --shadow-md: 0 18px 40px rgba(17, 36, 56, 0.1);
    --shadow-lg: 0 28px 60px rgba(17, 36, 56, 0.14);
    --border-radius: 12px;
    --border-radius-large: 20px;
    --transition: all 220ms ease;
}

body {
    font-family: 'Source Sans 3', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
}

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

a:hover {
    color: var(--color-primary);
}

.container {
    width: 100%;
    max-width: var(--layout-container-max);
    margin: 0 auto;
    padding: 0 var(--layout-container-padding);
}

.main-content {
    min-height: auto;
    padding: 1.25rem 0 2.5rem;
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"],
textarea {
    font-family: inherit;
    font-size: 1rem;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    transition: var(--transition);
    width: 100%;
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(227, 98, 28, 0.12);
}

.pg-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow-sm);
}

.pg-header__container {
    width: 100%;
    max-width: var(--layout-container-max);
    margin: 0 auto;
    padding: 1rem var(--layout-container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pg-header__logo-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.pg-header__logo-link:hover {
    color: var(--color-secondary);
}

.pg-header__logo-icon {
    font-size: 2rem;
    color: var(--color-primary);
}

.pg-header__logo-text {
    color: var(--color-secondary);
}

.pg-header__nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.pg-header__nav-link {
    color: var(--color-text);
    font-weight: 500;
    position: relative;
}

.pg-header__nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 3px;
    border-radius: 999px;
    background: var(--color-primary);
    transition: var(--transition);
}

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

.pg-footer {
    background: #112438;
    color: var(--color-white);
    padding: 2.4rem 0;
    margin-top: 4rem;
}

.pg-footer__container {
    width: 100%;
    max-width: var(--layout-container-max);
    margin: 0 auto;
    padding: 0 var(--layout-container-padding);
    text-align: center;
}

.pg-footer__links {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.pg-footer__link,
.pg-footer__separator,
.pg-footer__text,
.pg-footer__disclaimer {
    color: rgba(255, 255, 255, 0.78);
}

.pg-footer__link:hover {
    color: #fff;
}

.pg-footer__link {
    color: var(--color-white);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.pg-footer__link:hover {
    color: var(--color-secondary);
}

.pg-footer__separator {
    color: #666;
}

.pg-footer__text {
    margin-bottom: 0.5rem;
}

.pg-footer__disclaimer {
    font-size: 0.875rem;
    color: #aaa;
}

/* 响应式设计 */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }

    .pg-header__container {
        flex-direction: column;
        gap: 0.75rem;
        align-items: center;
    }

    .pg-header__nav-list {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.8rem 1.25rem;
    }
}