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

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f5f5f5;
    color: #111;
    line-height: 1.6;
}

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

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

/* ================= CONTAINER ================= */
.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

/* ================= HEADER ================= */
header {
    background: #000;
    color: #fff;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    font-size: 20px;
    font-weight: bold;
    letter-spacing: 1px;
}

/* ================= NAV ================= */
nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

nav ul li a {
    color: #fff;
    font-size: 14px;
    padding: 5px 0;
    transition: 0.3s;
}

nav ul li a:hover,
nav ul li a.active {
    border-bottom: 2px solid #fff;
}

/* CTA Button */
.nav-cta {
    background: #fff;
    color: #000;
    padding: 8px 14px;
    font-size: 13px;
    border-radius: 3px;
}

/* ================= MOBILE MENU ================= */
.menu-toggle {
    display: none;
    font-size: 22px;
    cursor: pointer;
}

@media (max-width: 768px) {
    nav ul {
        display: none;
        flex-direction: column;
        background: #000;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        padding: 20px;
    }

    nav ul.active {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }
}

/* ================= HERO ================= */
.hero {
    background: #111;
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 36px;
    margin-bottom: 20px;
}

.hero p {
    max-width: 700px;
    margin: auto;
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    padding: 10px 18px;
    background: #000;
    color: #fff;
    font-size: 14px;
    border-radius: 3px;
    transition: 0.3s;
}

.btn:hover {
    background: #333;
}

/* ================= SECTION ================= */
.section {
    padding: 60px 0;
}

.section h2 {
    font-size: 28px;
    margin-bottom: 30px;
    text-align: center;
}

/* ================= GRID ================= */
.grid {
    display: grid;
    gap: 20px;
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* ================= CARD ================= */
.card {
    background: #fff;
    padding: 20px;
    border-radius: 4px;
    transition: 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card h3 {
    margin: 15px 0 10px;
}

/* ================= IMAGE PLACEHOLDER ================= */
.image-box {
    background: #ddd;
    height: 200px;
}

/* ================= TABLE ================= */
table {
    width: 100%;
    border-collapse: collapse;
}

table th,
table td {
    padding: 10px;
    border: 1px solid #ccc;
    text-align: left;
}

/* ================= FORM ================= */
form input,
form textarea,
form select {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
}

/* ================= FOOTER ================= */
footer {
    background: #000;
    color: #fff;
    padding: 40px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.footer-grid h4 {
    margin-bottom: 10px;
}

.footer-grid ul {
    list-style: none;
}

.footer-grid ul li {
    margin-bottom: 6px;
}

.footer-bottom {
    text-align: center;
    margin-top: 30px;
    font-size: 12px;
    border-top: 1px solid #333;
    padding-top: 15px;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}
/* ===== Content Page (Privacy / Terms) ===== */
.content-page {
    max-width: 800px;
    margin: auto;
}

.content-page h1,
.content-page h2,
.content-page p {
    text-align: left;
}

.content-page h2 {
    margin-top: 25px;
}

.content-page p {
    margin-bottom: 15px;
}
/* ===== 图片优化 ===== */
img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
img {
max-width: 100%;
height: auto;
display: block;
}