:root {
    --ig-gradient: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    --bg-main: #FAFAFA;
    --bg-white: #FFFFFF;
    --text-main: #262626;
    --text-muted: #8E8E8E;
    --border-color: #DBDBDB;
    --btn-blue: #0095F6;
    --btn-blue-hover: #0074CC;
    --shadow: 0 4px 12px rgba(0,0,0,0.08);
}
* { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
body { background: var(--bg-main); color: var(--text-main); line-height: 1.6; }
a { text-decoration: none; color: inherit; }

/* Browser Access Nav */
.nav { display: flex; justify-content: space-between; align-items: center; padding: 10px 5%; background: var(--bg-white); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; height: 60px; }
.nav-brand { font-size: 24px; font-weight: 700; letter-spacing: -0.5px; }
.nav-links { display: flex; gap: 20px; align-items: center; }
.nav-links a { font-size: 14px; font-weight: 600; color: var(--text-main); }
.nav-links a:hover, .nav-links a.active { color: var(--text-muted); }
.nav-btn { background: var(--btn-blue); color: white !important; padding: 6px 16px; border-radius: 4px; transition: 0.2s; }
.nav-btn:hover { background: var(--btn-blue-hover); color: white !important; }

/* Hero */
.hero { text-align: center; padding: 60px 20px 40px; background: var(--bg-white); border-bottom: 1px solid var(--border-color); }
.hero-icon { margin: 0 auto 20px; width: 60px; height: 60px; background: var(--ig-gradient); border-radius: 16px; display: flex; align-items: center; justify-content: center; color: white; font-size: 30px; }
.hero h1 { font-size: 36px; font-weight: 700; margin-bottom: 15px; color: var(--text-main); letter-spacing: -0.5px; }
.hero p { font-size: 16px; color: var(--text-muted); max-width: 600px; margin: 0 auto 30px; }
.btn-group { display: flex; justify-content: center; gap: 15px; }
.btn { padding: 10px 24px; border-radius: 4px; font-size: 14px; font-weight: 600; cursor: pointer; border: 1px solid transparent; transition: 0.2s; }
.btn-primary { background: var(--btn-blue); color: white; }
.btn-primary:hover { background: var(--btn-blue-hover); }
.btn-secondary { background: transparent; color: var(--text-main); border-color: var(--border-color); }
.btn-secondary:hover { background: var(--bg-main); }

/* Data Bar */
.data-bar { display: flex; justify-content: center; gap: 60px; padding: 25px 20px; flex-wrap: wrap; background: var(--bg-white); border-bottom: 1px solid var(--border-color); }
.data-item { text-align: center; }
.data-item h3 { font-size: 18px; font-weight: 600; color: var(--text-main); }
.data-item p { font-size: 14px; color: var(--text-muted); }

/* Content Section */
.container { max-width: 1000px; margin: 0 auto; padding: 50px 20px; }
.section-title { font-size: 24px; font-weight: 600; text-align: center; margin-bottom: 40px; color: var(--text-main); }
.text-center { text-align: center; }
.img-fluid { max-width: 100%; border-radius: 8px; border: 1px solid var(--border-color); margin: 30px auto; display: block; box-shadow: var(--shadow); }

/* Browser Window Style Cards */
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 25px; }
.card { background: var(--bg-white); border: 1px solid var(--border-color); border-radius: 8px; overflow: hidden; transition: 0.2s; }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card-header { background: var(--bg-main); padding: 10px 15px; border-bottom: 1px solid var(--border-color); display: flex; gap: 6px; }
.card-dot { width: 10px; height: 10px; border-radius: 50%; background: #DBDBDB; }
.card-dot.r { background: #FF5F56; }
.card-dot.y { background: #FFBD2E; }
.card-dot.g { background: #27C93F; }
.card-body { padding: 20px; }
.card h3 { font-size: 16px; font-weight: 600; margin-bottom: 10px; color: var(--text-main); }
.card p { font-size: 14px; color: var(--text-muted); line-height: 1.5; }

/* FAQ & Steps */
.list-wrapper { max-width: 800px; margin: 0 auto; background: var(--bg-white); border: 1px solid var(--border-color); border-radius: 8px; }
.list-item { padding: 20px; border-bottom: 1px solid var(--border-color); }
.list-item:last-child { border-bottom: none; }
.list-item h3 { font-size: 15px; font-weight: 600; margin-bottom: 6px; color: var(--text-main); }
.list-item p { font-size: 14px; color: var(--text-muted); }

.guide-step { display: flex; gap: 15px; background: var(--bg-white); border: 1px solid var(--border-color); padding: 20px; border-radius: 8px; margin-bottom: 15px; align-items: center; }
.step-num { width: 36px; height: 36px; background: var(--bg-main); border: 1px solid var(--border-color); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 600; flex-shrink: 0; }
.guide-step h3 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.guide-step p { font-size: 14px; color: var(--text-muted); }

/* Footer */
.footer { background: var(--bg-white); border-top: 1px solid var(--border-color); padding: 40px 20px; text-align: center; }
.footer-links { margin-bottom: 15px; display: flex; justify-content: center; gap: 15px; flex-wrap: wrap; }
.footer-links a { color: var(--text-muted); font-size: 13px; font-weight: 600; }
.footer-links a:hover { color: var(--text-main); }
.footer p { font-size: 12px; color: #A8A8A8; }